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Research firm reaped stem cell funds despite panel's advice

Posted: October 17, 2012 at 8:15 pm

StemCells Inc. has a history not much different from those of dozens, even hundreds, of biotech companies all around California.

Co-founded by an eminent Stanford research scientist, the Newark, Calif., firm has struggled financially while trying to push its stem cell products through the research-and-development pipeline. It collects about $1 million a year from licensing patents and selling cell cultures but spends well more than $20 million annually on R&D, so it runs deeply in the red.

On the plus side, StemCells Inc. has had rather a charmed relationship with the California stem cell program, that $3-billion taxpayer-backed research fund known formally as the California Institute for Regenerative Medicine.

The firm ranks first among all corporate recipients of approved funding from CIRM, with some $40 million in awards approved this year. That's more than has gone to such established California nonprofit research centers as Cedars-Sinai Medical Center, the Salk Institute for Biological Studies, and the Sanford-Burnham Medical Research Institute.

The record of StemCells is particularly impressive given that one of the two proposals for which the firm received a $20-million funding award, covering a possible Alzheimer's treatment, was actually rejected by CIRM's scientific review panel twice. Nevertheless, the stem cell agency's governing board went ahead and approved it last month.

What was the company's secret? StemCells says it's addressing "a serious unmet medical need" in Alzheimer's research. But it doesn't hurt that the company also had powerful friends going to bat for it, including two guys who were instrumental in getting CIRM off the ground in the first place.

There's nothing improper about the state stem cell agency funding private enterprise; that's part of its statutory duties, and potentially valuable in advancing the goals of research. In part that's because CIRM is in a good position to help biotech firms leapfrog the "valley of death" the territory between basic research and the much more expensive and speculative process of moving a technology to clinical testing and, hopefully, the marketplace. Unfortunately, that's also the point where outside investment often dries up.

But private enterprise is new territory for CIRM, which has steered almost all its grants thus far to nonprofit institutions. Those efforts haven't been trouble-free: With some 90% of the agency's grants having gone to institutions with representatives on its board, the agency has long been vulnerable to charges of conflicts of interest. The last thing it needed was to show a similar flaw in its dealings with private companies too.

That brings us back to StemCells Inc. First, consider the firm's pedigree. Its co-founder was Irving Weissman, director of Stanford's Institute for Stem Cell Biology and Regenerative Medicine and a stem cell research pioneer. Weissman was one of the most prominent and outspoken supporters of Proposition 71, the 2004 ballot initiative that established the stem cell agency.

He's also been a leading beneficiary of CIRM funding, listed as the principal researcher on three grants worth a total of $24.5 million. The agency also contributed $43.6 million toward the construction of his institute's glittering $200-million research building on the Stanford campus. As of mid-April Weissman was still listed as a shareholder of StemCells, where his wife, Ann Tsukamoto, is an executive. Weissman, who is traveling in Africa, could not get back to me by deadline to talk about his relationship with the company.

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Journal Stem Cell Translational Medicine to Publish Article on FDA Communications and the Regulatory Pathway for Cell …

Posted: October 17, 2012 at 8:14 pm

WASHINGTON, DC--(Marketwire - Oct 17, 2012) - The Alliance for Regenerative Medicine (ARM), the international organization representing the interests of the regenerative medicine community, announced the publication today of an article on FDA communications to help companies developing cell-based therapies by clarifying the development pathway. The article, entitled "Communications with the FDA on the Development Pathway for a Cell-Based Therapy: Why, What, When, and How?" will be published in the journal Stem Cells Translational Medicine. It is co-authored by representatives from ARM, Janssen R&D, GE Healthcare and Life Technologies, with the lead author from the California Institute for Regenerative Medicine (CIRM).

"There are a number of ways cell-based therapy companies can communicate with FDA that will help them navigate the road from the bench to a regulatory submission," said Michael Werner, Executive Director of ARM. "We hope that our combined experience as co-authors, and our attempt to create a single source of guidance on the regulatory process, will help companies bring new cell-based therapies through clinical trials and the regulatory review process more quickly so they can reach patients faster," added Mr. Werner.

Lead author Ellen Feigal, MD, Senior Vice President for Research and Development at the California Institute for Regenerative Medicine (CIRM) commented, "Cell-based therapies represent a fundamentally new way to treat or cure disease, but developing a new therapy is costly, time consuming and fraught with uncertainty. Our paper takes a practical approach to clarifying the path to market."

"Communications with the FDA on the Development Pathway for a Cell-Based Therapy: Why, What, When, and How?" provides detailed information on options for communicating with the FDA at different stages; the official communications tied to each stage of development; and the most common reasons regulatory applications are delayed. The article can be accessed at: http://stemcellstm.alphamedpress.org/content/early/recent

About CIRM: CIRM was established in November 2004 with the passage of Proposition 71, the California Stem Cell Research and Cures Act. The statewide ballot measure, which provided $3 billion in funding for stem cell research at California universities and research institutions, was overwhelmingly approved by voters, and called for the establishment of an entity to make grants and provide loans for stem cell research, research facilities, and other vital research opportunities. A list of grants and loans awarded to date may be seen here: http://www.cirm.ca.gov/for-researchers/researchfunding.

About ARM: The Alliance for Regenerative Medicine is a Washington, DC-based multi-stakeholder advocacy organization that promotes legislative, regulatory and reimbursement initiatives necessary to facilitate access to life-giving advances in regenerative medicine. ARM also works to increase public understanding of the field and its potential to transform human healthcare, providing business development and investor outreach services to support the growth of its member companies and research organizations. Prior to the formation of ARM in 2009, there was no advocacy organization operating in Washington, DC to specifically represent the interests of the companies, research institutions, investors and patient groups that comprise the entire regenerative medicine community. Today ARM has more than 120 members and is the leading global advocacy organization in this field. In March 2012, ARM launched a sister organization in Europe -- the Alliance for Advanced Therapies. For more information go to http://www.alliancerm.org.

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Journal Stem Cell Translational Medicine to Publish Article on FDA Communications and the Regulatory Pathway for Cell ...

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Researchers discover new blood vessel-generating cell with therapeutic potential

Posted: October 17, 2012 at 12:12 pm

Public release date: 16-Oct-2012 [ | E-mail | Share ]

Contact: Bryan Ghosh bghosh@plos.org 44-122-344-2837 Public Library of Science

Researchers at the University of Helsinki believe they have discovered stem cells that play a decisive role in the growth of new blood vessels. If researchers learn to isolate and efficiently produce these stem cells found in blood vessel walls, the cells could offer new opportunities for developing therapeutics to treat diseases, such as cardiovascular disease and cancer. The study reporting the discovery of these stem cells is published in the open access journal PLOS Biology on October 16.

The growth of new blood vessels, known as neoangiogenesis, occurs during the repair of damaged tissue and organs in adults. However, malignant tumours also grow new blood vessels in order to receive oxygen and nutrients. As such, neoangiogenesis is both beneficial and detrimental to health, depending on the context, requiring therapeutic approaches that can either help to stimulate or prevent it. Therapeutics that aim to prevent the growth of new blood vessels are already in use, but the results are often more modest than predicted.

Adjunct Professor Petri Salvn and his team, from the University of Helsinki, now report that these stem cells can be found among the cellsso-called endothelial cellsthat line the inside of blood vessel walls. He explains, "we succeeded in isolating endothelial cells with a high rate of division in the blood vessel walls of mice. We found these same cells in human blood vessels and blood vessels growing in malignant tumours in humans. These cells are known as vascular endothelial stem cells, abbreviated as VESC. In a cell culture, one such cell is capable of producing tens of millions of new blood vessel wall cells".

From their studies in mice, the team are able to show that the growth of new blood vessels weakens, and the growth of malignant tumours slows, if the amount of these cells is below normal. Conversely, new blood vessels form where these stem cells are implanted.

"The identification and isolation of an entirely new adult stem cell type is a significant discovery in stem cell biology." explains Salvn. "Endothelial stem cells in blood vessels are particularly interesting, because they offer great potential for applications in practical medicine and the treatment of patients."

If an efficient method of vascular endothelial stem cell production could be developed, it could offer new treatment opportunities in situations where damaged tissue or diseases call for new blood vessel growth, or where the constriction or dysfunction of blood vessels deprives tissues of oxygen, for example in cardiac disease. These cells also offer new opportunities for developing therapeutics that seek to prevent new blood vessel growth in malignant tumours.

###

Funding: The work was supported by the Finnish Academy of Sciences. The funders had no role in study design, data collection and analysis, decision to publish,or preparation of the manuscript.

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New blood-vessel-generating cells with therapeutic potential discovered

Posted: October 17, 2012 at 12:12 pm

Washington, October 17 (ANI): Researchers believe they have discovered stem cells that play a decisive role in new blood vessel growth.

If the researchers at the University of Helsinki, Finland, learn to isolate and efficiently produce these stem cells found in blood vessel walls, the cells offer new opportunities in the treatment of cardiovascular diseases, cancer and many other diseases.

The growth of new blood vessels, also known as angiogenesis, is needed in adults when repairing damaged tissue or organs.

Unfortunately, malignant tumours are also capable of growing new blood vessels to receive oxygen and nutrients. In other words, the treatment of diseases would benefit from two types of methods - ones that help launch the process of angiogenesis and ones that make it possible to prevent the process.

Medications that prevent the growth of new blood vessels have already been introduced, but their effectiveness and long-term efficacy leave much to be desired.

For more than a decade, Adjunct Professor Petri Salven from the University of Helsinki has studied the mechanisms of angiogenesis to discover how blood vessel growth could be prevented or accelerated effectively.

He has examined the birth and origin of endothelial cells, which form the thin layer that lines the interior surface of blood vessels. Endothelial cells are necessary for new blood vessel growth. Where do these highly diversified cells come from? Can their production be prevented or increased?

For a long time, it was assumed that new cells in the blood vessel walls of an adult originate in the bone marrow. In an article published in the PNAS journal in 2008, Salven's research team showed that such stem cells were not found in bone marrow.

Now Salven is ready to reveal where these mysterious stem cells originate.

"We succeeded in isolating endothelial cells with a high rate of division in the blood vessel walls of mice. We found these same cells in human blood vessels and blood vessels growing in malignant tumours in humans. These cells are known as vascular endothelial stem cells, abbreviated as VESC. In a cell culture, one such cell is able to produce tens of millions of new blood vessel wall cells," Salven said.

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New blood-vessel-generating cells with therapeutic potential discovered

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New blood-vessel-generating cell with therapeutic potential discovered

Posted: October 17, 2012 at 12:12 pm

ScienceDaily (Oct. 16, 2012) Researchers at the University of Helsinki, Finland, believe they have discovered stem cells that play a decisive role in new blood vessel growth. If researchers learn to isolate and efficiently produce these stem cells found in blood vessel walls, the cells offer new opportunities in the treatment of cardiovascular diseases, cancer and many other diseases.

The study will be published Oct. 16, 2012 in the online journal PLOS Biology.

The growth of new blood vessels, also known as angiogenesis, is needed in adults when repairing damaged tissue or organs. Unfortunately, malignant tumours are also capable of growing new blood vessels to receive oxygen and nutrients. In other words, the treatment of diseases would benefit from two types of methods: ones that help launch the process of angiogenesis and ones that make it possible to prevent the process. Medications that prevent the growth of new blood vessels have already been introduced, but their effectiveness and long-term efficacy leave much to be desired.

For more than a decade, Adjunct Professor Petri Salvn from the University of Helsinki has studied the mechanisms of angiogenesis to discover how blood vessel growth could be prevented or accelerated effectively. He has examined the birth and origin of endothelial cells, which form the thin layer that lines the interior surface of blood vessels. Endothelial cells are necessary for new blood vessel growth. Where do these highly diversified cells come from? Can their production be prevented or increased?

For a long time, it was assumed that new cells in the blood vessel walls of an adult originate in the bone marrow. In an article published in the Proceedings of the National Academy of Sciences (PNAS) in 2008, Salvn's research team showed that such stem cells were not found in bone marrow.

Now Salvn is ready to reveal where these mysterious stem cells originate. His team's new study will be published in the PLOS Biology journal on 16 October 2012.

"We succeeded in isolating endothelial cells with a high rate of division in the blood vessel walls of mice. We found these same cells in human blood vessels and blood vessels growing in malignant tumours in humans. These cells are known as vascular endothelial stem cells, abbreviated as VESC. In a cell culture, one such cell is able to produce tens of millions of new blood vessel wall cells," Salvn explains.

"Our study shows that these important stem cells can be found as single cells among ordinary endothelial cells in blood vessel walls. When the process of angiogenesis is launched, these cells begin to produce new blood vessel wall cells."

The effects of new endothelial stem cells have also been tested in mice. The results show that the growth of new blood vessels weakens and the growth of malignant tumours slows if the amount of these cells in the organism is below normal. Correspondingly, a high number of new blood vessels quickly emerge where new stem cells are implanted.

Identifying stem cells among other blood vessel wall cells is challenging and time-consuming. Salvn and his team managed to identify a few molecular surface structures that make it easier to trace these stem cells. However, the efficiency of the identification process needs to be enhanced.

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Patient's husband testifies in stem cell doctor's hearing

Posted: October 17, 2012 at 12:12 pm

COLLIER COUNTY, Fla - A controversial stem cell doctor is fighting for his medical license in Collier County court.

Two of Dr. Zannos Grekos' patient who underwent experimental stem cell procedures died and as part of his defense, his attorney's say, family members of those patients could have done more to save their lives.

This week long hearing focuses on a 69 year old patient of Dr. Grekos who died in 2010. For the first time Tuesday that woman's husband talked about her experimental procedure, but he also describes her untimely death hours after receiving a stem cell treatment.

In March of 2010, Dr. Zannos Grekos preformed a cerebral angiogram and experimental stem cell procedure on a 69 year old woman, but as soon as she got home, her husband Jack says things go scary as his wife's condition took a turn for the worst.

"I thought she had a stroke, but I didn't know, I'm not a doctor," says Jack while testifying Tuesday. "But, there was nothing there, she was just blank."

Jack told the courtroom his wife went to Dr. Grekos' practice Regenocyte in Bonita Springs to cure a walking disability that occurred from breast cancer treatments. They were told by Dr. Grekos, worst case, it wouldn't work, but Tuesday he described the moments leading up to his wife's death.

"They told me she would be fine by the morning. I just kept an eye on her. Then, after she vomited and it was real bad. Then I called 911."

In cross examination Dr. Grekos' attorney, Richard Ozelie, referred to a deposition that describes how Jack's wife hit her head on the floor. According to a state report the patient suffered a severe brain stem injury. But, today in court Jack said his wife didn't fall, but slid out of a reclining chair.

Ozelie asks Jack, "Is it your testimony that your wife did not fall?"

"That's right, she did not fall, she couldn't even get up," says Jack.

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Patient's husband testifies in stem cell doctor's hearing

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Harvard Ophthalmologist Dr. Ula Jurkunas Introduces Stem Cell Transplant for Eyes

Posted: October 17, 2012 at 12:12 pm

Grants Pass, OR (PRWEB) October 16, 2012

Harvard Ophthalmologist and Corneal Stem Cell Researcher Ula Jurkunas, MD, has announced an important new stem cell transplant procedure for the eyes.

Speaking on the Sharon Kleyne Hour Power of Water radio show, Dr. Jurkunas, predicted that the procedure will offer a significant benefit to patients with certain corneal diseases, and corneal injuries such as chemical and thermal burns (The cornea is the eyes clear portion).

Stem cell research has been in the news because the 2012 Nobel Prize for Medicine was awarded for stem cell research.

Dr. Jurkunas explained to host Sharon Kleyne that the human eye produces its own adult (non-embryonic) stem cells. These are found between the limbus (where the clear cornea meets the white of the eye) and the conjunctiva (the red meaty tissue in the eyes inner corner). Their function is to replenish corneal cells to keep the cornea clear and healthy.

Production of corneal stem cells, according to Dr. Jurkunas, can become impaired due to a disease entity such as an infection, severe allergy, severe dry eye, immunological disorder or chronic inflammation; or due to injury such as a chemical or thermal burn. These traumas can cause the cornea to become cloudy and ulcerated. Prior to the present corneal stem cell research, there had been no reliable, non-invasive treatment for these conditions.

Corneal stem cell transplantation, Dr. Jurkunas explains, has the advantage of utilizing the patients own tissue as donor cells. Stem cells may be taken either from healthy tissue elsewhere in the diseased eye, from the patients other eye, or from the patients inner cheek (which has many similarities to eye tissue and also produces adult stem cells). Donor stem cells are then isolated and grown in culture. The final step is to transfer them to the affected cornea using a stem cell bandage.

The procedure, says Dr. Jurkunas, has resulted in dramatic corneal clearing and sight restoration. Although research is ongoing and the procedure remains experimental, corneal stem cell therapy is available in clinical trials. Widespread applications of the procedure, including routine testing for corneal stem cell deficiency, are anticipated. Stem cell therapy, according to Dr. Jurkunas, could eventually be used for macular degeneration, glaucoma and other eye diseases.

Dr. Jurkunas stressed the importance of water and hydration in maintaining a healthy tear film and cornea. The tear film covering the cornea is 99% water and is essential to the light refraction that enables vision. Dry eye and related eye infections, according to Dr. Jurkunas, can damage both the cornea and adjacent stem cell producing tissues that enable the cornea to repair itself. Water in the tear film stimulates the healthy production of stem cells. Water is also critical to keeping stem cells viable during transplantation.

Mrs. Kleyne and Dr. Jurkunas agree that non-invasive therapies using the bodys own tissues, such as corneal stem cell transplantation, could eventually prove indispensable in combating the worldwide health effects of global drying and dehydration.

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Harvard Ophthalmologist Dr. Ula Jurkunas Introduces Stem Cell Transplant for Eyes

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Research firm reaped stem cell funds despite panel's advice

Posted: October 17, 2012 at 12:12 pm

StemCells Inc. has a history not much different from those of dozens, even hundreds, of biotech companies all around California.

Co-founded by an eminent Stanford research scientist, the Newark, Calif., firm has struggled financially while trying to push its stem cell products through the research-and-development pipeline. It collects about $1 million a year from licensing patents and selling cell cultures but spends well more than $20 million annually on R&D, so it runs deeply in the red.

On the plus side, StemCells Inc. has had rather a charmed relationship with the California stem cell program, that $3-billion taxpayer-backed research fund known formally as the California Institute for Regenerative Medicine.

The firm ranks first among all corporate recipients of approved funding from CIRM, with some $40 million in awards approved this year. That's more than has gone to such established California nonprofit research centers as Cedars-Sinai Medical Center, the Salk Institute for Biological Studies, and the Sanford-Burnham Medical Research Institute.

The record of StemCells is particularly impressive given that one of the two proposals for which the firm received a $20-million funding award, covering a possible Alzheimer's treatment, was actually rejected by CIRM's scientific review panel twice. Nevertheless, the stem cell agency's governing board went ahead and approved it last month.

What was the company's secret? StemCells says it's addressing "a serious unmet medical need" in Alzheimer's research. But it doesn't hurt that the company also had powerful friends going to bat for it, including two guys who were instrumental in getting CIRM off the ground in the first place.

There's nothing improper about the state stem cell agency funding private enterprise; that's part of its statutory duties, and potentially valuable in advancing the goals of research. In part that's because CIRM is in a good position to help biotech firms leapfrog the "valley of death" the territory between basic research and the much more expensive and speculative process of moving a technology to clinical testing and, hopefully, the marketplace. Unfortunately, that's also the point where outside investment often dries up.

But private enterprise is new territory for CIRM, which has steered almost all its grants thus far to nonprofit institutions. Those efforts haven't been trouble-free: With some 90% of the agency's grants having gone to institutions with representatives on its board, the agency has long been vulnerable to charges of conflicts of interest. The last thing it needed was to show a similar flaw in its dealings with private companies too.

That brings us back to StemCells Inc. First, consider the firm's pedigree. Its co-founder was Irving Weissman, director of Stanford's Institute for Stem Cell Biology and Regenerative Medicine and a stem cell research pioneer. Weissman was one of the most prominent and outspoken supporters of Proposition 71, the 2004 ballot initiative that established the stem cell agency.

He's also been a leading beneficiary of CIRM funding, listed as the principal researcher on three grants worth a total of $24.5 million. The agency also contributed $43.6 million toward the construction of his institute's glittering $200-million research building on the Stanford campus. As of mid-April Weissman was still listed as a shareholder of StemCells, where his wife, Ann Tsukamoto, is an executive. Weissman, who is traveling in Africa, could not get back to me by deadline to talk about his relationship with the company.

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Stem cells: this election’s neglected child

Posted: October 17, 2012 at 8:15 am

An important issue pushed into the background.

Stem cell issues: still important issues. Photograph: Getty Images

In a US election year dominated by economic issues, research using human embryonic stem cells (hESC) has received far less attention in 2012 than in previous election years just another social debate pushed into the background, despite its ethical controversy and the fact that it could have major implications for the treatment of conditions as serious and widespread as diabetes, cancer, heart disease and dementia.

Although stem cell research isn't exactly on top of this year's election agenda, the result when America goes to the polls on 6 November could have a major impact on hESC research in the US. The main issue at hand is not whether embryonic stem cell research should be banned both Obama and Romney agree that this research is legal but whether it should be federally funded through the National Institutes of Health (NIH).

President Obama has effectively made his position clear during his time in office. In 2009, he reversed a directive from his predecessor George W Bush that denied federal funding to research on any stem cells created after 2001, limiting researchers to the 21 stem cell lines (a family of constantly dividing cells) that had been derived from embryos up to that point. Obama's legislation re-opened the 1,000 or more stem cell lines that have been created since then to federally-funded research, a move welcomed by the scientific community and condemned by pro-life campaigners and conservative Republicans.

In reality, despite Obama's 2009 legislation, under the Dickey-Wicker amendment introduced in 1996 it is still illegal in the US to pursue any research that involves the creation, destruction or discarding of human embryos, meaning that although American scientists can conduct research on stem cell lines derived from embryos, they are barred from using embryos to create their own lines. The Dickey-Wicker amendment remains an obstacle to embryonic stem cell research in the US and it's unclear if the president would have the clout to do away with it if re-elected.

Romney's personal view on hESC seems to broadly follow the pro-life stance of his party; he supports stem cell research in general, but opposes the destruction of embryos for the purpose. In a Republican presidential candidates' debate for the last election in 2007, Romney stated that he wouldn't use federal funds to finance hESC research. This would essentially take the US back to the same situation as under George W Bush, and there's no reason to think that Romney has changed his position between 2007 and now.

The Republican candidate has consistently extolled the benefits of adult and umbilical cord stem cells, which, he asserts, provide the benefits of creating pluripotent cells without the "moral shortcut" of destroying an embryo in the process. Alternatives to embryonic stem cell research are Romney's perfect political solution, allowing him to appear to support stem cell research without losing the religious right by excusing the destruction of embryos.

From a scientific standpoint, his position is less tenable. Researchers have said that the development of non-embryonic stem cell types is actually dependent on embryonic stem cell research as a complementary process. So by plugging adult stem cell research alternatives as the exclusive answer to the field's ethical issues, Romney may be unwittingly damaging their development by depriving researchers of important side-by-side embryonic research.

Whatever the outcome of the elections on 6 November, the US is unlikely to live up to its stem cell research potential when compared to world leaders in the field. If Obama wins, there will at least be federal funding to study existing embryonic stem cells, but the Dickey-Wicker amendment will maintain the ban on creating new stem cell lines. If Romney turns the tide and emerges on top, American stem cell researchers will likely have to suffer through four more years in the unfunded wilderness.

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New blood-vessel-generating cells with therapeutic potential discovered

Posted: October 17, 2012 at 8:15 am

Washington, October 17 (ANI): Researchers believe they have discovered stem cells that play a decisive role in new blood vessel growth.

If the researchers at the University of Helsinki, Finland, learn to isolate and efficiently produce these stem cells found in blood vessel walls, the cells offer new opportunities in the treatment of cardiovascular diseases, cancer and many other diseases.

The growth of new blood vessels, also known as angiogenesis, is needed in adults when repairing damaged tissue or organs.

Unfortunately, malignant tumours are also capable of growing new blood vessels to receive oxygen and nutrients. In other words, the treatment of diseases would benefit from two types of methods - ones that help launch the process of angiogenesis and ones that make it possible to prevent the process.

Medications that prevent the growth of new blood vessels have already been introduced, but their effectiveness and long-term efficacy leave much to be desired.

For more than a decade, Adjunct Professor Petri Salven from the University of Helsinki has studied the mechanisms of angiogenesis to discover how blood vessel growth could be prevented or accelerated effectively.

He has examined the birth and origin of endothelial cells, which form the thin layer that lines the interior surface of blood vessels. Endothelial cells are necessary for new blood vessel growth. Where do these highly diversified cells come from? Can their production be prevented or increased?

For a long time, it was assumed that new cells in the blood vessel walls of an adult originate in the bone marrow. In an article published in the PNAS journal in 2008, Salven's research team showed that such stem cells were not found in bone marrow.

Now Salven is ready to reveal where these mysterious stem cells originate.

"We succeeded in isolating endothelial cells with a high rate of division in the blood vessel walls of mice. We found these same cells in human blood vessels and blood vessels growing in malignant tumours in humans. These cells are known as vascular endothelial stem cells, abbreviated as VESC. In a cell culture, one such cell is able to produce tens of millions of new blood vessel wall cells," Salven said.

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