Showing posts with label Stem cells. Show all posts
Showing posts with label Stem cells. Show all posts

Friday, December 06, 2013

Scientists used human stem cells for lung tissue

Mywebhealthreport.com


Scientists had previously converted stem cells into cells of the heart, intestine, liver, nerves and pancreas, Fox News reports.

"Now, we are finally able to make lung and airway cells," study leader Dr. Hans-Willem Snoeck, a professor of microbiology and immunology at Columbia University in New York, said in a statement.

Patients who receive lung transplants today have a poor prognosis. But future approaches involving transplants that use the patient's own stem cells to generate lung tissue could reduce the chances that a patient's immune system would reject the transplant, the researchers said. 
In the new study, Snoeck's team found evidence suggesting the cells could develop into six types of lung and airway epithelial cells.

The technology could enable researchers to model certain lung diseases.

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Wednesday, June 13, 2012

Japan team claims they created functional human liver from stem cells: report

S

A team of scientists claim they transplanted induced pluripotent stem (iPS) cells
into the body of a mouse, where it grew into a small, but working, human liver, 
the Yomiuri Shimbun said.

EBASTIAN KAULITZKI/SHUTTERSTOCK.COM

NY Daily News

Japanese researchers have created a functioning human liver from stemcells, a report said Friday, raising hopes for the manufacture of artificial organs for those in need of transplants.
A team of scientists transplanted induced pluripotent stem (iPS) cells into the body of a mouse, where it grew into a small, but working, human liver, the Yomiuri Shimbun said.
Stemcells are frequently harvested from embryos, which are then discarded, a practice some people find morally objectionable. But iPS cells -- which have the potential to develop into any body tissue -- can be taken from adults.
A team led by professor Hideki Taniguchi at Yokohama City University developed human iPS cells into "precursor cells", which they then transplanted into a mouse's head to take advantage of increased blood flow.
The cells grew into a human liver 0.2 inches in size that was capable of generating human proteins and breaking down drugs, the Yomiuri reported.
The breakthrough opens the door to the artificial creation of human organs, a key battleground for doctors who constantly face a shortage of transplant donors.
Taniguchi's research could be "an important bridge between basic research and clinical application" but faces various challenges before it can be put into medical practice, the Yomiuri said.
An abstract of Taniguchi's research was delivered to regenerative medicine researchers ahead of an academic conference next week, but Taniguchi declined to comment to AFP before the meeting.
Two separate teams, one from the United States and one from Japan, discovered iPS cells in 2006.


“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today! Tell Your Loved Ones of Your Decision”

Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, donatelife.net
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You.

Friday, May 18, 2012

Stem Cell Transplant Patients Show Long Term Improvement

By Live Science Staff

An injection of a patient's own stem cells seems to help heal spinal cord injury in the long run, new research suggests. Thirty percent of stem cell therapy patients showed significant functional or other improvements after 6 months.

This study, following after an initial report of results on six patients, is the first attempt at direct spinal injection of a patient's own stem cells for the treatment of spinal cord injury in humans. The latest data was reported in the May 2012 issue of the journal Neurosurgery.

The stem cell transplantation was performed in 10 patients with permanent movement problems or paralysis after spinal cord injury. The researchers transplanted stem cells cultured from each patient's own bone marrow, grew them in the lab into spinal cord cells, and injected them into the patient's back.

The researchers monitored the patients for improvement in their ability to move their arms and hands and to perform key activities of daily living. Imaging scans and tests of muscle activity were performed as well. 

Three of the patients showed "continuous and gradual motor improvement," the authors write. In three more patients, the improvement was detectable, but less drastic.

Six months after their injections, 60 percent of patients showed improvement in motor power of the arms and hands. Of these, three patients had gradual improvement in the ability to perform daily activities — for example, preparing meals and typing on a keyboard.

These three patients also showed significant changes in the spinal cord, including evidence of healing around the injured area of the spine. They also had improvement in studies of their muscle activity.

These 3 patients that showed the most improvement came into the trial with "residual neurological function," the authors write. This could mean that the treatment "is more likely to enhance the remaining neurological function rather than regeneration."

They call for further studies to understand the mechanism of improvement after MSC treatment and to clarify which patients with spinal cord injury are most likely to benefit.

Additionally, the results support the safety of these blood marrow stem cells for use in treatments.

The report shows not only the promise of stem cell treatments, but their safety. None of the ten patients had any permanent complications related to the transplantation. This helps to alleviate concerns that stem cell injection could lead to later problems like the development of tumors or calcifications.


“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today! Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, donatelife.net
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You.

Thursday, March 29, 2012

Growing organs for transplants

Regenerative Medicine has exciting possibilities for the future of medicine as scientists are learning to use stem cells to replace defective cells and attempt to restore normal function in a wide range of organs. I had the privilege of taking a tour of the McEwen Centre for Regenerative Medicine in Toronto and seeing this research first hand.

At any given time there are up to 86-thousand people worldwide waiting for donor organ. Until researchers can make regenerative medicine reality, you can make a difference by being an organ donor."

By Dr. Jay Adlersberg
NEW YORK (WABC) -- Organ transplants have progressed rapidly in recent years, but organ recipients still need medication to suppress the immune system.

One exception is a transplant between identical twins and that's presenting researchers with an exciting goal.

It sounds like something out of science fiction, but it's happening right in our lifetime, and you will be hearing more and more about it.

The solution to finding a organ like one that might come from an identical twin is to grow one, and that field is called regenerative medicine.
It was just about a year ago that Ernesto Boleaga learned his symptoms - fatigue, anemia and swollen feet were caused by severe kidney failure. He would need a transplant. His twin brother's response was immediate.

"I have two kidneys. I said, 'If I can give you one of my two kidneys, please take it,'" Jose Luis Boleaga said.

Because they're identical twins, the brothers have the same genetic makeup, so Ernesto's body accepts his brother's kidney as its own.

Ernesto's immune system won't reject it as it would one from an unrelated donor.

For most people, drugs that suppress the immune system help stop the rejection process. But they cause side effects, and over time, the body's immune system "wins" and damages the new kidney.

"I think the challenge today is how do you make that organ last for a lifetime?"Mikel Prieto, M.D., Mayo Clinic transplant surgeon, said.

The answer may be in regenerative medicine that is, reproducing an organ that is essentially genetically identical to the patient getting it.

Right now, researchers in the lab are able to turn stem cells into other cells such as kidney cells. The hope is that one day they will be able to grow those cells into life saving organs for people like Ernesto.

"We hope that sometime in the future we will be able to reproduce an organ that is essentially genetically identical to the patient getting it. When we achieve that, then basically every transplant will be like doing a transplant between identical twins," Prieto said.

At any given time there are up to 86-thousand people worldwide waiting for donor organ. Until researchers can make regenerative medicine reality, you can make a difference by being an organ donor.

“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, donatelife.net
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You.

Thursday, February 16, 2012

Patients' stem cells reduce tissue damage after heart attacks

Stem cell treatments use cells that have the potential to develop into many different types of cells in the body. They serve as a repair system for the body. There are two main types of stem cells: embryonic stem cells and adult stem cells. In the article below the heart's own stem cells were used to repair damage caused to it, scientists say. They help the organ re-grow healthy muscle after a heart attack and research with regenerative medicine in other organs shows promise for the future.

Doctors and scientists are excited about stem cells because they have potential in many different areas of health and medical research. Studying stem cells may help explain how serious conditions such as birth defects and cancer come about. Stem cells may one day be used to make cells and tissues for therapy of many diseases.


By Adam Cresswell, HEALTH EDITOR,The Australian
RESEARCHERS have reported dramatic reductions in amounts of heart tissue damaged during heart attacks, after treating patients with stem cells taken from their own bodies - a technique experts say raises hopes for future treatments.

The US experts found the amount of scar tissue inside the patients' hearts had halved after the treatment was given, and new healthy muscle tissue was created - suggesting it might be possible to recover some of the heart function typically lost after heart attacks.

Although the study was small, involving just 25 patients, and designed merely to prove the technique was safe enough for further research, the authors said it "provides early evidence for therapeutic regeneration" and could lead to a new treatment option.

"This discovery challenges the conventional wisdom that, once established, cardiac scarring is permanent and that, once lost, healthy heart muscle cannot be restored," they wrote.

Heart attacks occur when the heart muscle cannot get enough oxygen from the blood to function, as when the blood flow is blocked by a clot.

The dead or damaged area of heart muscle is later replaced by scar tissue as the heart recovers, but this results in a weakened heart because the scar tissue does not beat as healthy heart muscle does.

For the study, the authors from the Cedars-Sinai Heart Institute in Los Angeles gathered stem cells from the hearts of patients who had suffered a heart attack within the past month. They then isolated the stem cells and grew them, before injecting up to 25 million of these cells back into the arteries around the heart.

The researchers found that before the treatment, an average of 24 per cent of the patients' left ventricles had turned to scar tissue, but this fell to 16 per cent six months after the treatment, and to 12 per cent after 12 months.

In the study, published online yesterday by The Lancet, the authors said it was unclear why this led to only a slight increase in the ejection fraction, a measure of the heart's pumping ability.

Robert Grenfell, clinical issues director for the National Heart Foundation, said the research was promising and indicated that in future it "may be possible to regenerate heart muscle that is damaged during a heart attack".


“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, donatelife.net
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You.

Friday, December 02, 2011

Pay ban on donor organs doesn't include bone marrow, U.S. appeals court says

This is an important ruling for those afflicted with cancer, leukemia and genetic disorders and hopefully we will see an increase in donors that will save many more lives.

The Bellingham Herald
By Carol J. Williams - Los Angeles Times

LOS ANGELES - A federal law banning compensation for organ transplants doesn't extend to bone marrow harvested from a donor's blood, a federal appeals court said Thursday in a ruling that could attract thousands of new donors in a national campaign to save the lives of those afflicted with cancer, leukemia and genetic disorders.

The 1984 National Organ Transplant Act included bone marrow in its list of "organs and parts thereof" for which donors could face criminal charges and five years in prison for providing them in exchange for money or other "valuable consideration."

Although bone marrow is naturally replenishable, unlike livers, kidneys and other whole organs, its sale was barred because the extraction method used at the time the law was passed was painful and risky for the donor and authorities feared the poor would be induced to submit to the procedure to earn money.

In the last 20 years, though, medical advances have brought about a less intrusive method by which the life-saving marrow stem cells are harvested from a donor's bloodstream in much the same way as blood is drawn at a blood bank. The new process, known as apheresis, filters out excess marrow stem cells that circulate in the bloodstream, as opposed to the surgical extraction method, known as aspiration, which inserts a large needle into the hip bone and siphons out the cells.

A unanimous three-judge panel of the 9th U.S. Circuit Court of Appeals ruled that the marrow cells taken from a donor's blood were blood parts, not organ parts, and that a donor is therefore free to accept compensation for a donation.

"This is a fundamental change to how deadly blood diseases will be treated in the country," said Jeff Rowes, the Institute for Justice attorney who argued the case before the 9th Circuit panel in February. "Compensation will expand the donor pool by at least hundreds and potentially thousands each year."

More than 3,000 Americans die each year waiting for a suitable marrow donor, Rowes told the court, representing a group of cancer patients and their families, a Minnesota doctor specializing in bone marrow treatments and the California nonprofit MoreMarrowDonors.org.

The lead plaintiff in the case is Doreen Flynn of Lewiston, Maine, a single mother of five trying to ensure that a broader field of potential donors is available when her three daughters suffering from Fanconi anemia need marrow transplants after treatment for the potentially fatal genetic disorder.

"That is, like, the best Christmas news ever!" said a jubilant Flynn upon hearing that the 9th Circuit had ruled to exclude marrow from the compensation ban. Her 13-year-old daughter is already on medication to stave off the need for a marrow transplant while waiting for a well matched donor, and Flynn must decide soon whether to put one of her 7-year-old twins on the same medication, she said.

MoreMarrowDonors.org wanted the organ transplant law struck down or amended to allow the nonprofit to offer $3,000 scholarships or housing payments to attract new registrants to the National Marrow Donor Program. The registry has more than 7 million members, but many joined years ago during donor drives for friends or family members and are often reluctant to donate to a stranger.

Although the extraction procedure has been greatly simplified, it remains difficult to find the right genetic match between donor and recipient, the plaintiffs argued. Unlike blood, of which there are only four types, marrow comes in millions of types.

The plaintiffs sued U.S. Attorney General Eric H. Holder Jr., alleging that the federal law treating bone marrow in the same way as organs that can't be regenerated violates the Equal Protection Clause of the Constitution. The appeals court panel ruled that the older extraction method directly drawing cells from the marrow was reasonably included in the ban on compensation but that the marrow cells filtered out of a donor's blood were blood parts, not marrow parts.

"We construe 'bone marrow' to mean the soft, fatty substance in bone cavities, as opposed to blood, which means the red liquid that flows through the blood vessels," said the opinion written by Judge Andrew J. Kleinfeld, an appointee of President George H.W. Bush. "The statute does not prohibit compensation for donations of blood and the substances in it, which include peripheral blood stem cells."

Justice Department spokesman Charles S. Miller said the government hasn't decided yet whether to appeal.

"We're going to have to review it to make a determination about what the government's next step will be," Miller said, declining to comment on the ruling.

The 9th Circuit interpretation applies to its nine-state jurisdiction, but because it is the only federal appeals court to have ruled on the question, its judgment could guide future decisions nationwide.

Note: Canadian Bone Marrow donation policy
Canadian Blood Services operates the OneMatch Stem Cell and Marrow Network
OneMatch will reimburse expenses incurred as a result of donating stem cells. For example, if you have to go to another city for the procedure, they will cover travel and accommodation costs for you and a companion. While the procedure and recovery will take you away from work for a short time, experience has shown that most employers are willing to give sick time or paid leave to stem cell donors.

“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, organdonor.gov
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You.

Monday, October 31, 2011

Zebrafish have capacity to regenerate their own hearts

The potential to regenerate organ tissue is exciting news as researchers around the world are developing techniques such as generating beating heart cells from stem cells. I had the opportunity to see this in action during a personal tour of the McEwen Centre for Regenerative Medicine and learned that stem cells are undifferentiated (or unspecialized) cells that are capable of renewing themselves indefinitely. This undifferentiated state means that a single stem cell has a unique capability to grow and generate a wide variety of specialized cell types (e.g., muscle cells, neurons, heart muscle cells, etc) under the right physiological conditions.

How a fish can teach us survival
Zebrafish have a rare capacity to regenerate their own hearts if they get damaged. Now scientists hope to learn from them.

Zebrafish are not just for brightening aquariums, they are key to research. Photograph: Alamy

theguardian.co.uk
The British Heart Foundation turned 50 earlier this year and launched its Mending Broken Hearts Appeal – one of its most ambitious projects ever. The goal is to spend £50m ($80.57 million) on research that could begin to literally mend broken hearts in as little as 10 years.

Hope for success rests partly on the amazing zebrafish, which have the ability to regenerate heart muscle – something that tens of thousands of people in the UK living with debilitating heart failure caused by a heart attack can't do. By unlocking the biological secrets of the zebrafish, scientists funded by the Mending Broken Hearts Appeal aim to identify and harness the key genes and chemical messengers that allow the fish to regenerate heart muscle, and find a way to help human hearts damaged by heart attacks heal themselves.

Without this vital research, the growing number of patients surviving heart attacks will remain without hope of an end to the debilitating symptoms of heart failure, such as breathlessness, tiredness, palpitations, swollen ankles, lack of appetite, anxiousness and depression. Drugs and surgery can help alleviate symptoms, but currently the only cure for heart failure is a heart transplant. And even if a donor is found, a heart transplant may not fully restore quality of life for recipients who require a lifetime of immunosuppressant drugs to prevent organ rejection.

How much better it would be to be able to regenerate healthy heart tissue and replace heart muscle destroyed by heart attacks. The zebrafish is already providing vital clues about how this could be done in human hearts. If part of its heart is damaged, it can repair it in a matter of weeks, just like we are able to mend a broken bone.

Because zebrafish are transparent early in their life cycle, it is relatively easy for researchers to see their hearts and blood vessels grow. Their hearts begin to develop after just 12 hours, and they reach adult size – about 3cm long – in about three months, so they can provide quick research results.

Dr Tim Chico, consultant cardiologist at the University of Sheffield, whose work is partly funded by the British Heart Foundation (BHF), explains: "The same pathways and genes that made my heart and your heart are responsible for switching on heart development in zebrafish. At that fundamental level we share more common mechanisms than you might imagine.

"We have a library of many thousands of compounds that might be the next best drug. With zebrafish we can very quickly screen them to see if the compounds have an effect.

"We can switch off genes and see how the zebrafish regrows vessels to repair damage. If we could switch the right genes on in humans then we could live longer and survive better after a heart attack."

By spending £50m ($80.57 million), the BHF aims to fund world-leading scientists in stem cell research, regenerative medicine and developmental biology to find ways to repair or replace damaged or dead heart tissue with new, healthy, functioning heart tissue.

"The aim of the Mending Broken Hearts Appeal is to start early clinical trials within five years and full trials within another five so that in 10 years people with heart failure would have a brighter future," says the BHF's medical director, Professor Peter Weissberg.

Stem cells, for example, offer hope because they have the potential to turn into any specialist cell. Scientists think they can harness stem cells from elsewhere in the patient's body to repair damaged heart muscle – or find out what can trigger stem cells already present in the heart to repair themselves. read more.

“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, organdonor.gov
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Tuesday, October 18, 2011

Breakthrough in Diabetes Treatment

By Maria Hill technorati.com

There is new hope for diabetics, according to the Neural Stem Cell Transplant May Tackle Diabetes report on October 14, 2011. Researchers in Japan have found a way to regenerate the beta cells of the pancreas, which makes possible a long awaited cure to this devastating disease that affects as many as 200 million people on our planet. The research finding were published in EMBO Molecular Medicine on October 6.

Insulin dependent diabetics are plagued by insufficient insulin production in the pancreas, the organ responsible its production. The pancreas is a shaped like a fish and located behind the stomach in the abdomen. Insulin is produced by beta cells which are located in the islets of Langerhans in the pancreas. When the beta cells do not function, insulin injections are necessary since diabetes is a debilitating chronic disease with many serious and life threatening complications. Diabetes treatment has been hindered by the low donations of pancreatic beta cells to regenerate the beta cells.

Researchers in Japan have found a creative solution to the problem using neural stem cells. The research which was conducted at the AIST Institute in Tsukuba, Japan was led by Dr. Tomoko Kuwabara. Human stem cells can be differentiated which means that there is a process though which stem cells can be adapted to different cell replacement roles in the body. This technique is particularly useful for situations which target a single cell as in the case of diabetes. "As diabetes is caused by the lack of a single type of cell the condition is an ideal target for cell replacement treatments," said Kuwabara.

Image Credit: TopNewsHealth

The research transplanted cells from the hippocampus and olfactory bulb in the front of the brain into a diabetic rate. The cells then began to act like the beta cells of the pancreas. They produced insulin and when removed the rat's sugar levels rose again. Since these brain cells do not normally produce insulin, the results were a pleasant surprise because they demonstrated that the brain cells could be used as an effective treatment for diabetes.

Science Daily noted the encouraging peer response to the research results: "The discovery of stem cells which have virtually unlimited self-renewal raises great expectations for their use in regenerative medicine. The isolation and cultivation of stem cells as a renewable source of beta cells would be a major breakthrough," wrote Onur Basak and Hans Clevers, from the Hubrecht Institute for Development Biology and Stem Cell Research, in their close up paper, published in the same issue of EMBO Molecular Medicine.

Not only does this research provide great hope for diabetics but it also offers new hope for many others suffering from diseases created by non functioning cells like diabetes. It is truly a breakthrough which will be welcomed by many.

“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, organdonor.gov
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Wednesday, October 12, 2011

New Transplant Method May Eliminate Need for Lifelong Medication

FoxNews.com
A new technique for organ transplants may eliminate the need for lifelong anti-rejection drugs after surgery, according to a recent study.

Stock photo
Johns Hopkins researchers have developed a way to stimulate stem cells in rats after a liver transplant as a means of preventing rejection of the new organ without the need for immunosuppressant drugs.

Anti-rejection medicines carry serious side effects and are a major obstacle to long-term survival of people who require organ transplants.

The study found that a combination of two drugs lengthened survival time and prevented liver rejection in rodents. One drug was a low dose of tacrolimus, which prevented immediate rejection of the transplant, and the other was plerifaxor, which freed the recipient's stem cells from the bone marrow.

The bone marrow cells freed by plerifaxor then traveled to the damaged liver and repopulated it with the recipients’ own cells, replacing the donor cells that cause rejection. The stem cells also appeared to control immune response by increasing the amount of regulatory T-cells.

Essentially, the scientists said they transformed the donor liver from a foreign object under attack by the immune system into an organ tolerated by the body within three months of the surgery.

And – the rats only had to take the medications for one week after the transplant.

The researchers are also testing the method on other transplanted organs, including kidneys, in rats and other larger animals. They hope to begin testing in humans within a few years.

"It is the dream for all scientists in the transplant field to erase the need for lifelong immunosuppressant drugs," said Dr. Zhaoli Sun, an associate professor of surgery at the Johns Hopkins University School of Medicine.

"Currently, if a patient survives for 10 or 20 years with a new liver, that organ is still seen as foreign inside its new body because immunosuppression puts blinders on the immune system that must stay on to prevent rejection. Our idea was to find a way to turn that organ into something that 'belongs' and is never at risk of rejection."

The study was published in the American Journal of Transplantation.

“You Have the Power to Donate Life – to become an organ and tissue donor Sign-up today!
Tell Your Loved Ones of Your Decision”
Australia, register at Australian Organ Donor Register
New Zealand, register at Organ Donation New Zealand
South Africa, http://www.odf.org.za/
United States, organdonor.gov
United Kingdom, register at NHS Organ Donor Register
Your generosity can save or enhance the lives of up to fifty people with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help by donating skin, corneas, bone, tendon, ligaments and heart valves
Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Monday, September 26, 2011

StemCells reports world's 1st neural stem cell transplant in spinal cord injury patient

Stem cell research has the potential to cure many human conditions such as cancer, birth defects and the treatment of diseases by genetic engineering. Even the regeneration of organs for transplantation could be possible.

pharmabiz.com
StemCells, Inc. announced that the first patient in the company's breakthrough phase I/II clinical trial in chronic spinal cord injury was successfully transplanted with the company's proprietary HuCNS-SC adult neural stem cells. The stem cells were administered at Balgrist University Hospital, University of Zurich, a world leading medical centre for spinal cord injury and rehabilitation. The transplant surgery was performed by a team of surgeons led by Dr Raphael Guzman, a visiting staff neurosurgeon also on faculty at Department of Neurosurgery, Stanford University, and Dr K Min, an orthopaedic surgeon at Balgrist University Hospital.

"I am pleased to be a part of this innovative clinical trial designed to help us assess the safety and potential efficacy of HuCNS-SC stem cells for spinal cord injury," explains Dr. Armin Curt, Principal Investigator. "The preclinical data underlying this trial provided compelling rationale to conduct a study of this nature in spinal cord-injured patients." StemCells, Inc. has published numerous preclinical studies demonstrating the therapeutic potential of the company's human neural stem cells for the treatment of acute and chronic spinal cord injury. These studies were conducted in close collaboration with Drs. Aileen Anderson and Brian Cummings of the University of California, Irvine.

The first patient transplanted in the trial, a 23-year-old German man, suffered a spinal cord injury in an automobile accident in April of this year. He sustained a complete loss of sensation and mobility from the waist down. When asked about his decision to enroll in this leading-edge study, he said: "This terrible injury crossed out almost all my life plans, and has led me to an unexpected path. Participating in this clinical trial not only gives me a sense of hope, but it also helps move this important research forward."

"With this first patient enrolled and dosed, we remain on track to meet our goal of treating the first cohort of patients by the end of this year," said Stephen Huhn MD, FACS, FAAP, vice president and head of the CNS Program at StemCells, Inc. "While the trial's first cohort will consist of patients with the most severe, complete injury, the second and third cohorts will progress to patients with less severe, incomplete injury. This unique trial design will allow us to evaluate the potential of our HuCNS-SC cells as a treatment for a broad spectrum of spinal cord injury patients. Even a small improvement could have a marked impact on quality of life for the millions of people who suffer from this debilitating condition."

The phase I/II clinical trial of StemCells, Inc.'s HuCNS-SC purified human adult neural stem cells is designed to assess both safety and preliminary efficacy. Twelve patients with thoracic (chest-level) neurological injuries at the T2-T11 level are planned for enrollment. The first three patients will all have injuries classified as ASIA A, in which there is no apparent neurological function below the injury level, the most severe level identified by the American Spinal Injury Association (ASIA) Impairment Scale. The second and third cohorts will be patients classified as ASIA B and ASIA C, those with less severe injury, in which there is some preservation of sensory or motor function. In addition to assessing safety, the trial will assess preliminary efficacy based on defined clinical endpoints, such as changes in sensation, motor and bowel/bladder function.

All patients will receive HuCNS-SC cells through direct transplantation into the spinal cord and will be temporarily immunosuppressed. Patients will be evaluated regularly in the post-transplant period in order to monitor and assess the safety of the HuCNS-SC cells, the surgery and the immunosuppression, as well as to measure any recovery of neurological function below the injury site. The Company intends to follow the effects of this therapy long-term, and a separate 4-year observational study will be initiated at the conclusion of this trial.

According to a study reported by the Christopher and Dana Reeve Foundation, nearly 1.3 million people in the United States are estimated to be living with chronic spinal cord injury. The chronic phase of spinal cord injury is considered to begin when inflammation has stabilized and recovery has reached a plateau, which is typically several months following injury. Currently, there are no effective treatment options for patients with chronic spinal cord injury, and treatment approaches have generally targeted the acute and sub-acute time points, which are within hours or days of injury. Given the unmet need in chronic spinal cord injury, restoring some degree of function for patients at time points beyond the acute phase could have a transformative impact on the field. StemCells hopes to address a broad population of spinal cord-injured patients by opening the window of opportunity for therapeutic intervention well after the acute injury and targeting a wide range of injury levels and degrees of impairment.

Balgrist University Hospital, University of Zurich is recognized worldwide as a highly specialized centre of excellence providing examination, treatment and rehabilitation opportunities to patients with serious musculoskeletal conditions.

StemCells, Inc. is engaged in the research, development, and commercialization of cell-based therapeutics and tools for use in stem cell-based research and drug discovery.

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Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Wednesday, August 17, 2011

Nanotechnology Researchers Turn Embryonic Stem Cells into Heart cells

The push towards growing organs for transplantation has received a boost from the latest discovery by the Institute of Bioengineering and Nanotechnology (IBN), the world's first bioengineering and nanotechnology research institute. Researchers from IBN have shown that human embryonic stem cells (hESCs) can be transformed into heart cells using a 'decellularized' heart as a scaffold.

The IBN research team comprising Dr Shujun Gao, Serina Ng, Dr Andrew Wan and Dr Karthikeyan Narayanan (from left to right).

azoano.com
Every day, 15 people die from heart disease in Singapore, which accounted for 31.6% of all deaths in 2009.1 Worldwide, the number of severe heart failure patients waiting for transplant far exceeds the number of available donor hearts. The severe shortage of available donor hearts necessitates the development of other options for heart replacement. Now, with IBN's research breakthrough, we are one step closer to growing a new replacement heart from human embryonic stem cells.

Every organ in the human body has a scaffold or a structure, which provides it with its shape, and within this scaffold are many different types of cells with different functions. Tissue engineering aims to create the organ scaffold - either through the use of synthetic materials such as polymers, or through decellularization, which uses the whole organ as a scaffold after removing its cells.

Decellularization is ideal for tissue regeneration because it preserves the three-dimensional structure of the organ and the extracellular matrix (ECM) - the framework between the cells - that are complex and difficult to mimic. While current methods use specific ECM proteins to transform stem cells into a particular cell type, scientists have found it difficult to imitate the natural ECM.

Using the decellularization approach, a team of researchers led by Dr Andrew Wan, IBN Team Leader and Principal Research Scientist and Dr Karthikeyan Narayanan, Senior Research Scientist and Project Leader, removed the cells from the heart of a mouse and implanted the empty heart scaffold with hESCs to observe if these cells could attach to the scaffold and develop into heart cells. After 14 days, the cells developed into two different types of cells found in the heart: cardiac marker expressing cells and endothelial or blood vessel cells.

The cell-laden scaffold was then implanted back into the mouse where it was observed to develop visible blood vessels. The formation of blood vessels in the scaffold is critical for the transport of nutrients and oxygen to the heart, and has posed a major challenge in tissue engineering.

Dr Wan explained, "By exploiting the intact scaffold of a heart, we have directed the differentiation of human embryonic stem cells into cardiac cells. This study is the first proof-of-concept that addressed the complexity of obtaining different cell types in a scaffold using stem cells. The positive results we have derived encourage us to take this one step further, to achieve functional cardiac cells, and bring whole organ regeneration to the next level."

Professor Jackie Ying, IBN Executive Director, added, "IBN's Cell and Tissue Engineering research is actively developing bioartificial organs using a combination of stem cell technology and biocompatible materials as alternative treatments for organ failures."

Stem cells are an attractive cell source for seeding decellularized organs. Besides hESCs, the team also used progenitor cells derived from the hESCs, which are found in a subset of tissues including heart tissues, to see if the two cell types would regenerate differently. The findings revealed that both stem cell types developed different types of cardiac marker expressing cells and the progenitor cells exhibited the same gene expression pattern as cells in a beating heart.

Published recently in a leading peer-reviewed journal, Biomaterials, this new finding could pave the way to the development of a bioartificial heart, and realize the decellularized organ approach for organ transplantation. If successful, xenogeneic organs - animal organs seeded with human stem cells - could then be explored as a feasible alternative for regenerative medicine.

Source: Singapore Heart Foundation

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Wednesday, July 13, 2011

Scientists grow whole tooth units using mouse stem cells

I became very interested in stem cell research after a tour of the McEwen Centre for Regenerative Medicine in Toronto. Their focus of research is in heart, neurological, diabetes, blood and lungs and I was excited about the promise of hope for the future. We are seeing researchers from all over the world achieve stunning results with stem cells, such as the successful growing and transplantation of a trachea (windpipe) and now Japanese researchers are claiming to have made a breakthrough in organ transplant technology. They've engineered an entire tooth from stem cells and successfully transplanted the tooth into a mouse. It's thought to be the first time a complex body part has been developed this way.

In an interview with ABC News in Australia, the Japanese researchers say because the tooth is a more complex structure than any grown before it opens up a range of surreal possibilities.

The breakthrough's first commercial application will be for regeneration of hair follicles, say the Japanese scientists. Other experts say possibly within say 10 years, we can probably transplant, regenerate fingers and toes and perhaps even limbs. Ultimately we might even be able to generate eyes. The Japanese researchers say the ultimate goal is to grow livers and kidneys, to relieve the worldwide shortage of organs for transplants

..team removed two types of stem cells from the molar teeth of mice and grew them in the laboratory. To control the length and shape of the teeth, the cells were placed in a mould, where they grew into entire tooth units.
The entire tooth units were then transplanted into the lower jaws of one-month-old mice. They fused with the tissues and jaw bones around them after about 40 days, Tsuji said. Nerve fibers too could be detected in the new teeth..

By TAN EE LYN, Reuters GMAnews.tv
HONG KONG — Scientists in Japan said on Wednesday they have created teeth — complete with connective fibres and bones — by using mouse stem cells and successfully transplanted them into mice, a step they hope will lead to progress in stem cell research.

The entire tooth units, which were inserted into lower jaws of mice, attached successfully with jaw bones and the rats were able to chew normally, the researchers wrote in a paper in PLoS One (Public Library of Science).

"The bioengineered teeth were fully functional... there was no trouble (with) biting and eating food after transplantation," wrote Masamitsu Oshima, assistant professor at the Research Institute for Science and Technology, Tokyo University of Science.

The researchers hope this is a step to help the development of new human organs grown from a patient's own cells.

"At present, researchers worldwide do not have the method to culture three-dimensional organs in vitro (outside the body)," Professor Takashi Tsuji, who led the research, wrote in his reply to questions from Reuters.

"It is important to develop technologies for the culture of the bioengineered organ... for the realization of future organ replacement regenerative therapy."

Stem cells are the body's master cells and source of all cells and tissues. They are undifferentiated and experts believe they can generate all the cell types of the organ from which they originate.

Because of their ability to generate different types of cells and multiply and self-renew, scientists hope to harness stem cells to treat a variety of diseases and disorders, including cancer, diabetes and injuries.

From stem cells to whole tooth units

Tsuji's team removed two types of stem cells from the molar teeth of mice and grew them in the laboratory. To control the length and shape of the teeth, the cells were placed in a mould, where they grew into entire tooth units.

The entire tooth units were then transplanted into the lower jaws of one-month-old mice. They fused with the tissues and jaw bones around them after about 40 days, Tsuji said. Nerve fibers too could be detected in the new teeth.

Tsuji stressed the importance of finding the right "seed cells" for reparative therapy. In this case, entire tooth units could be grown because the stem cells were taken from molar teeth of mice — where they later grew into enamel, dental bones and other parts that comprised a regular tooth unit.

In 2010, US researchers created an artificial lung that rats used to breathe for several hours. — Reuters

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Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Tuesday, July 12, 2011

Man's New Windpipe is the World's First Synthetic Organ Transplant

What’s the News: An African man’s new trachea is the world’s first synthetic organ to be transplanted. Made from a polymer scaffold coated with the patient’s own cells, the windpipe seems to be working out well, more than a month after the surgery.

The synthetic trachea, just before implantation
    How the Heck:
  • The patient had an inoperable golfball-sized tumor, which hadn’t responded well to chemo or radiation treatments, obscuring his windpipe. While patients in such straits often receive donor tracheae, none were available.
  • Scientists built a polymer scaffold exactly the same size and shape as the patient’s trachea and two primary bronchi, using 3D scans taken of the patient as a model.
  • Another group of scientists then seeded the artificial trachea with stem cells taken from the patient’s bone marrow. The cells were allowed to grow for two days, as researchers prodded them to differentiate into the various tissue types found in a healthy trachea.
  • Surgeons then removed the patient’s cancerous trachea and implanted the synthetic replica during a 12-hour operation.
  • Since the new trachea is built of the patient’s own cells, there was no risk he would reject the transplant—and thus no need for post-op immunosuppressant drugs.
  • The patient is doing well, and will be released from Karolinska University Hospital in Stockholm, Sweden,where the procedure took place, on Friday.
  • What's the Context:
  • Earlier windpipe transplants have also used tissues derived from the patients’ stem cells—but the tissues were grown on donor tracheae, not artificial scaffolds, meaning that a suitable donor was still needed for every transplant.
  • Building new organs from only a patient’s cells and manmade materials, however, could eliminate the need for donor organs altogether, a major benefit given the chronic shortage of organs and the number of patients who die while waiting for a transplant.
  • This transplant was also amazingly fast—two days to grow a trachea!—which is particularly good news for patients who are critically ill.
  • The Future Holds:
  • The lead surgeon has three more lab-grown trachea transplants planned, two in the US and one in Korea.
  • While researchers hope this technique could be used to grow not just tracheas but many other organs, it won’t be an easy process. Hollow organs like tracheas will likely prove easy to build in the lab compared to organs composed of thick tissue, such as the heart.
by Valerie Ross in Health & Medicine Discovermagazine.com

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Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Friday, August 06, 2010

First child in the world to undergo the breakthrough procedure to transplant his trachea with one grown from his own stem cells.

I was very intrigued by this article because of the breakthrough technique to use the patient's own stem cells to coat the donor windpipe and then transplanting it into the recipient. This eliminates the need for anti-rejection drugs and the associated complications and it is hoped the technique will eventually replace almost all transplant surgery.

Ciaran Finn-Lynch pictured with his parents Colleen and Paul Photo: PA

First child to have 'miracle' operation leaves hospital

An 11-year-old British boy who came close to death after being born with a windpipe just one millimeter wide is now able to breathe normally again following pioneering surgery doctors have described as a 'kind of miracle'.

By Rebecca Smith, Medical Editor, Telegraph.co.uk

Ciaran Finn-Lynch became the first child in the world to undergo the breakthrough procedure to transplant his trachea with one grown from his own stem cells.

He had been born with a windpipe just one millimeter wide and went through repeated surgery from a young age.

Although he managed well with a series of metal devices to hold his trachea open, they repeatedly burrowed into a major blood vessel causing 'massive bleeding'.

Speaking for the first time about her son's ordeal yesterday, Ciaran's mother Colleen told how she thought she had lost him. But now, four months after the operation, she said she had been 'given her boy back'.

The technique involved taking a windpipe from a dead donor and stripping it of its living tissue, before squirting the leftover scaffold with stem cells taken from Ciaran's bone marrow.

The trachea was then transplanted into his throat almost immediately where the stem cells have grown into normal tissue to cover the scaffold and provide a new windpipe. While the tissue was growing, his windpipe was supported by a temporary scaffold which will dissolve naturally.

The technique avoids complications associated with straight transplantation when the body can often reject donor organs without powerful drugs to keep the recipient's immune system in check.

As the trachea transplanted in Ciaran is covered with tissue that has grown from his own cells, his body will not reject it and he does not need any anti-rejection drugs.

A similar operation was carried out in Barcelona, Spain, two years earlier but in that operation that stem cells were grown on the windpipe scaffold in the laboratory and it was only transplanted four months later.

Speaking yesterday as her family prepared to leave Great Ormond Street Hospital in London for their home in Northern Ireland, Ciaran's mother said they were not daunted by their son being the first child to undergo such a procedure.

She said: "We didn't have much choice when it came to the operation.

"If Ciaran had one more bleed I don't think he would have made it."

She said they had "100 per cent faith" in the transplant team, led by Great Ormond Street's Professor Martin Elliott.

"When they initially suggested the procedure we agreed to it, knowing it would be the first time it had been tried in a child, as we have 100% faith in them and the work they do.

She said Ciaran's recovery had been "up and down" but he kept his spirits up.

"Because it's so new, nobody knows what's ahead, or how long his full recovery is going to be, but we are on the right road now," she said.

"We're just so grateful, we are delighted they gave Ciaran a chance, we've got our boy back."

Ciaran, who turned 11 last month, is looking forward to going home and is likely to return to school in September.

A keen drummer, he is most excited about being able to play in his band again, and even started practising with a lesson in the hospital's intensive care unit recently.

The donor was found for Ciaran four months before his operation, from a 30-year-old Italian woman.

Colleen said: “We are obviously also incredibly grateful and indebted to Ciaran’s donor and are aware of the heartbreak that family went through in losing someone.

"They have displayed courage and selflessness and we would like to use this opportunity to urge people to think about signing up to the organ donor register.”

It is hoped the technique will eventually replace almost all transplant surgery.

Prof Martin Elliott, director of the tracheal service at Great Ormond Street, said 'enormous numbers' of patients could benefit from this technique in future. In many types of surgery pieces of tissue from animals or plastic substitutes are used but that could all be replaced with the patient's own stem cells.

“You Have the Power to Save Lives – Register to be an organ and tissue donor & Tell Your Loved Ones of Your Decision”
Register to be a donor in Ontario or Download Donor Cards from Trillium Gift of Life Network. NEW for Ontario: recycleMe.org - Learn The Ins & Outs Of Organ And Tissue Donation. Register Today! For other Canadian provinces click here
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In Great Britain, register at NHS Organ Donor Register
In Australia, register at Australian Organ Donor Register
Your generosity can save up to eight lives with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help 75 to 100 other people by donating skin, corneas, bone, tendon, ligaments and heart valves

Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You

Tuesday, June 15, 2010

Livers grown in the laboratory could solve organ transplant shortage

Many centers around the world are experimenting in their labs to find ways to repair or grow new organs and the following report gives hope for the future of liver transplantation.

I had the great pleasure of visiting the labs at the McEwen Centre for Regenerative Medicine at Toronto General Hospital, University Health Network and saw first hand the exciting experiments the scientists were doing with stem cell biology and regenerative medicine.

McEwan scientists have successfully used gene therapy to repair and recondition donor lungs that were found unsuitable for transplant. Also, researchers at McEwan are using stem cells not just to try to regenerate damaged spinal cords or hearts but to test medications on organ cells grown from stem cells. They can now generate heart cells from human stem cells and generate liver cells from human stem cells. Heart and liver transplant recipients are especially vulnerable to side effects from medications and the feeling is that new drugs could be tested in the lab before they are ever given to patients. This is an exciting time in organ transplantation as scientists are working to find ways to ease the shortage of organs for transplantation, improve medications and save more lives.


Livers could be grown in the laboratory for transplantation into humans within five years, new research suggests.

By Richard Alleyne, Science Correspondent
Telegraph.co.uk

Livers from organ donors are often too damaged to be used Photo: PA

Doctors believe the breakthrough could "revolutionize" how liver diseases are treated and also solve the shortage of organs for transplant.

The techinique could be used to recycle thousands of donated organs which are at present considered too old or damaged for transplantation.

The liver could be 'rejuvenated' using the patient's own cells, removing the need for powerful drugs to prevent the body rejecting the organ.

"The basic idea is to grow a liver in the lab for transplantation," said Dr Korkot Uygon at Harvard Medical School.

"If we succeed it will definitely revolutionise how liver diseases are treated."

More than 600 liver transplants are carried out each year in Britain, but it is estimated that more than a fifth of patients die waiting.

Many livers have to be discarded because they are too old or too damaged to be of any use.

The new technique works by effectively chemically stripping the old liver down too its basic "scaffold" or exoskeleton in a process of called "decellularization".

Onto this frame of connective tissue and blood vessels, they then regrow the new liver using stem cells from the patient. Stem cells from embryos could also be used.

The effectively brand new liver is then transplanted back into the patient.

At the moment the technique will require donor organs but it is hoped that eventually pig's livers or artificial scaffolds can be used instead – effectively avoiding donors altogether.

The technique is very similar to one used in replacing the windpipe of Claudio Castillo two years ago in Spain but because the liver is a more complicated organ it has taken longer to develop.

Dr Uygon and his team's breakthrough is to perfect the technique in rats.

"This scaffold retains for the most part the detailed microarchitecture of the liver, including essential structures such as the blood vessels," said Dr Uygon.

"We take advantage of this remaining structure to repopulate the scaffold with liver cells to recreate a functional liver.

"As we have shown this re-engineered liver performs the most essential liver functions in the lab and can be transplanted into rats and stays intact, with the cells able to survive."

He said he was "cautiously optimistic" but there were still hurdles to overcome.

"If all goes well, to be doing this with humans in 5-10 years is quite possible, which is why this is a significant step forward," he said.

"But tissue engineering was promised to deliver such tissues grown in lab before, and it didn't do quite do so well, which is why I'm trying to be cautiously optimistic."

Dr Martin Yarmush, co-author of the study in Nature Medicine, said the quarter of a million donor livers discarded each year because they are not suitable for transplantation would be an obvious source of supply for the creation of these scaffolds.

“You Have the Power to Save Lives – Register to be an organ and tissue donor & Tell Your Loved Ones of Your Decision”
Register to be a donor in Ontario or Download Donor Cards from Trillium Gift of Life Network. NEW for Ontario: recycleMe.org - Learn The Ins & Outs Of Organ And Tissue Donation. Register Today! For other Canadian provinces click here
In the United States, be sure to find out how to register in your state at ShareYourLife.org or Download Donor Cards from OrganDonor.Gov
In Great Britain, register at NHS Organ Donor Register
In Australia, register at Australian Organ Donor Register
Your generosity can save up to eight lives with heart, kidneys, liver, lungs, pancreas and small intestine transplants (see allotransplantation). One tissue donor can help 75 to 100 other people by donating skin, corneas, bone, tendon, ligaments and heart valves

Has your life been saved by an organ transplant? "Pay it forward" and help spread the word about the need for organ donation - In the U.S. another person is added to the national transplant waiting list every 11 minutes and 18 people die each day waiting for an organ or tissue transplant. Organs can save lives, corneas renew vision, and tissue may help to restore someone's ability to walk, run or move freely without pain. Life Begins with You