New reprogramming factor cocktail produces therapy-grade induced pluripotent stem cells
By LizaAVILA
7 hours ago Stem cells. Credit: Nissim Benvenisty - Wikipedia
Induced pluripotent stem cells (iPSCs)adult cells reprogrammed back to an embryonic stem cell-like statemay hold the potential to cure damaged nerves, regrow limbs and organs, and perfectly model a patient's particular disease. Yet through the reprogramming process, these cells can acquire serious genetic and epigenetic abnormalities that lower the cells' quality and limit their therapeutic usefulness.
When the generation of iPSCs was first reported in 2006, efficiency was paramount because only a fraction of a percentage of reprogrammed cells successfully became cell lines. Accordingly, the stem cell field focused on reprogramming efficiency to boost the pool of cells that could be studied. However, as scientists gained an increased understanding of the reprogramming process, they realized that myriad variables, including the ratio of reprogramming factors and the reprogramming environment, can also greatly affect cell quality.
Now researchers working in the lab of Whitehead Institute Founding Member Rudolf Jaenisch together with scientists from the Hebrew University have determined that the reprogramming factors themselves impact the reprogramming efficiency and the quality of the resulting cells. Their work is described in the current issue of the journal Cell Stem Cell.
"Postdoctoral researcher Yosef Buganim and Research Scientist Styliani Markoulaki show that a different combination of reprogramming factors may be less efficient than the original, but can produce much higher quality iPSCs," says Jaenisch, who is also a professor of biology at MIT. "And quality is a really important issue. At this point, it doesn't matter if we get one colony out of 10,000 or one out of 100,000 cells, as long as it is of high quality."
To make iPSCs, scientists expose adult cells to a cocktail of genes that are active in embryonic stem cells. iPSCs can then be pushed to differentiate into almost any other cell type, such as nerve, liver, or muscle cells. Although the original combination of Oct4, Sox2, Klf4, and Myc (OSKM) efficiently reprograms cells, a relatively high percentage of the resulting cells have serious genomic aberrations, including aneuploidy, and trisomy 8, which make them unsuitable for use in clinical research.
Using bioinformatic analysis of a network of 48 genes key to the reprogramming process, Buganim and Markoulaki designed a new combination of genes, Sall4, Nanog, Esrrb, and Lin28 (SNEL). Roughly 80% of SNEL colonies made from mouse cells were of high quality and passed the most stringent pluripotency test currently available, the tetraploid complementation assay. By comparison, only 20-30% of high quality OSKM passed the same test. Buganim hypothesizes that SNEL reprograms cells better because, unlike OSKM, the cocktail does not rely on a potent oncogene like Myc, which may be causing some of the genetic problems. More importantly, the cocktail does not rely on the potent key master regulators Oct4 and Sox2 that might abnormally activate some regions in the adult cell genome.
To better understand why some reprogrammed cells are of high quality while others fall short, Buganim and Markoulaki analyzed SNEL colonies down to the genetic and epigenetic level. On their DNA, SNEL cells have deposits of the histone protein H2AX in locations very similar to those in ESCs, and the position of H2AX seems to predict the quality of the cell. The researchers believe this characteristic could be used to quickly screen for high quality colonies.
But for all of its promise, the current version of SNEL seems unable to reprogram human cells, which are generally more difficult to manipulate than mouse cells.
"We know that SNEL is not the ideal combination of factors," says Buganim, who is currently a Principal Investigator at Hebrew University in Jerusalem. "This work is only a proof of principle that says we must find this ideal combination. SNEL is an example that shows if you use bioinformatics tools you can get better quality. Now we should be able to find the optimal combination and try it in human cells to see if it works."
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New reprogramming factor cocktail produces therapy-grade induced pluripotent stem cells
Reneuron on track for clinical milestones as studies get underway
By LizaAVILA
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Stem cell therapy group Reneuron said it remains on track with the first patients having been dosed in two its clinical trials.
The phase II trial for the ReN001 cell therapy candidate for stroke disability and the phase I trail for ReN009 cell therapy candidate for critical limb ischaemia have both begun.
The ReN001 trial is on course to have generated six month follow-up data by the end of 2015, while ReN009 study should give results in the first half of next year.
Chief executive officer (CEO) Michael Hunt said that Reneuron's core therapeutic programmes remain on track towards "further important clinical milestones" over the next 18 months.
"In particular, the commencement of dosing of patients in two new clinical trials, in stroke and limb ischaemia, marks another significant step in Reneuron's evolution into a fully-fledged clinical development business and a leading player in the increasingly exciting field of cell therapy and regenerative medicine," Hunt said.
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Stem Cell Activation Phuket, Thailand: How have the stem cell therapy results been so far – Video
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Stem Cell Activation Phuket, Thailand: How have the stem cell therapy results been so far
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Stem Cell Activation Phuket, Thailand: How is your stem cell therapy different – Video
By LizaAVILA
Stem Cell Activation Phuket, Thailand: How is your stem cell therapy different
http://www.thanyapurahealth.com/health-services/natural-stem-cell-activationregenerative-therapy/how-is-your-stem-cell-therapy-different/ Thanyapura Health offers natural stem cell activation,...
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Stem Cell Activation Phuket, Thailand: How is your stem cell therapy different - Video
New tool aids stem cell engineering for medical research
By LizaAVILA
PUBLIC RELEASE DATE:
28-Aug-2014
Contact: Robert Nellis newsbureau@mayo.edu 507-284-5005 Mayo Clinic
ROCHESTER, Minn. A Mayo Clinic researcher and his collaborators have developed an online analytic tool that will speed up and enhance the process of re-engineering cells for biomedical investigation. CellNet is a free-use Internet platform that uses network biology methods to aid stem cell engineering. Details of CellNet and its application to stem cell engineering are described in two back-to-back papers in the journal Cell.
"This free platform has a broad range of uses for all types of cell-based investigations and can potentially offer help to people working on all types of cancer," says Hu Li, Ph.D., investigator in the Mayo Clinic Center for Individualized Medicine and Department of Molecular Pharmacology & Experimental Therapeutics, and co-lead investigator in the two works. "CellNet will indicate how closely an engineered cell resembles the real counterpart and even suggests ways to adjust the engineering."
The network biology platform contains data on a wide range of cells and details on what is known about those cell types. Researchers say the platform can be applied to almost any study and allows users to refine the engineering process. In the long term, it should provide a reliable short cut to the early phases of drug development, individualized cancer therapies, and pharmacogenetics.
CellNet uses 21 cell types and tissues and data from 56 published human and mouse engineering studies as a basis for analyzing and predicting cell fate and corresponding engineering strategies. The platform also offers classification scores to determine differentiation and conversion of induced pluripotent stem cells. It reveals incomplete conversion of engineered microphages and hepatocytes. CellNet can be used for interrogation of cell fate following expression profiling, by classifying input by cell type, quantifying gene regulatory network status, and identifying aberrant regulators affecting the engineering process. All this is valuable in predicting success of engraftment of cancer tumors in mouse avatars for cancer and drug development research. CellNet can be accessed at cellnet.hms.harvard.edu.
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Co-lead authors with Dr. Li are Patrick Cahan, Ph.D., and Samantha Morris, Ph.D., of Boston Children's Hospital. The senior investigators are George Q. Daley, M.D., Ph.D., Director of the Stem Cell Transplantation Program at Boston Children's and senior investigator on both studies and James Collins, Ph.D., Core Faculty member at the Wyss Institute and the William F. Warren Distinguished Professor at Boston University, co-senior investigator on one of the studies.
Investigators are supported in part by the National Institutes of Health, specifically, the National Institute of Diabetes and Digestive and Kidney Diseases and the National Heart, Lung, and Blood Institute; the Children's Hospital Stem Cell Program; the Howard Hughes Medical Institute; Alex's Lemonade Stand Foundation; the Ellison Medical Foundation; the Doris Duke Medical Foundation; the Mayo Clinic Center for Individualized Medicine and the Mayo Clinic Center for Regenerative Medicine.
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STEM CELL THERAPY: with DR ANDREW J. ROCHMAN – Video
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STEM CELL THERAPY: with DR ANDREW J. ROCHMAN
Dr. Andrew J Rochman is a leader in advanced surgical techniques, a native New Yorker and a Board-Certified Surgeon. His current undertaking involves promoting an educational advocacy in MODERN...
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Rogue stem cell therapy operators charging thousands for ineffective treatments, researchers say
By LizaAVILA
ABC Kellie van Meurs (3rd from R) died of a heart attack last month while receiving stem cell treatment in Moscow.
Rogue operators in Australia and overseas are charging thousands of dollars for ineffectual stem cell treatments, a leading stem cell research group has warned.
And Stem Cells Australia says there is a growing number of patients going overseas for stem cell treatments which are limited in Australia.
A loophole in the therapeutic goods legislation means that doctors are legally allowed to treat patients, both here and overseas, with their own stem cells even if that treatment is unsafe or has not been proven effective through clinical trials.
Stem Cells Australia believes that dozens of doctors in Australia offer the questionable treatments.
"They're selling treatment without any proof of benefit, and without any proof of safety," Associate Professor Megan Munsie, a stem cell biologist at the University of Melbourne, told 7.30.
Annie Leverington was diagnosed with multiple sclerosis in 2007.
She was once a talented flamenco dancer and worked as a court stenographer.
But in 2002 she noticed something was wrong when her fingers started to "drop" during long trials.
Then her feet started to go.
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Rogue stem cell therapy operators charging thousands for ineffective treatments, researchers say
Amazing pensioner helps save 264 lives in 30 countries on four continents
By LizaAVILA
At the age of 70, many people are retired but Glenn Abbassi is still dashing round the world doing one of the most important jobs ever.
As a volunteer courier for bone marrow register Anthony Nolan, its her mission to travel thousands of miles transporting vital stem cells for seriously ill transplant patients.
So far, during seven years in her role, she has helped to save the lives of 264 people. She has travelled to four continents and more than 30 countries. She even spent last Christmas away from her family in China.
Speaking yesterday in support of a new Anthony Nolan campaign, she said: I wouldnt change it for the world. Every trip I embark on is as important as the next one.
Glenn, a former NHS complaints manager, explained how donated cells have to be with the recipient within 72 hours.
Getting back in time is a matter of life or death, she said.
The cells are used to treat a range of conditions, including cancer and blood disorders.
Glenns role is particularly poignant as her first husband Peter Davies was diagnosed with the blood disorder aplastic anaemia in 1977. He died three years later aged just 43.
She met her current husband Eddie, 68, a retired air conditioning engineer, a few years later when he flew to Britain from his homeland in Iran to donate his bone marrow to his brother.
They fell in love when Eddie lodged with her while his brother recovered.
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Amazing pensioner helps save 264 lives in 30 countries on four continents
AFL approves stem-cell therapy
By LizaAVILA
Aug. 24, 2014, 2:09 a.m.
An Australian-based biomedical company has been given approval from the AFL to use stem-cell therapy on players recovering from injury.
An Australian-based biomedical company has been given approval from the AFL to use stem-cell therapy on players recovering from injury.
Sydney-based Regeneus has revealed it was recently given permission for its HiQCell treatment on players suffering from such issues as osteoarthritis and tendinopathy.
The treatment is banned by the World Anti-Doping Agency if it is performance-enhancing but allowed if it is solely to treat injuries.
Regeneus commercial development director Steven Barberasaid the regenerative medicine company had sought approval from the AFL for what the company says is "innovative but not experimental" treatment.
"In 2013, Regeneus sought and received clearance from ASADA [Australian Sports Anti-Doping Authority] for its proprietary HiQCell therapy for use with athletes who participate in sporting competitions subject to the WADA Anti-Doping Code. The AFL is one of many professional sports bodies which applies the WADA Anti-Doping Code within its regulations for players," he said.
"In March this year, the AFL introduced a Prohibited Treatments List as an additional level of scrutiny over and above the WADA code for player treatments. In light of this, Regeneus made a submission to the AFL to confirm that our specific treatment is not prohibited under that list. Subsequently, the chief medical officer of the AFL has recently communicated with our primary Melbourne-based HiQCell medical practitioner that the treatment is not prohibited and can be administered on a case-by-case basis to players.
"We anticipate documented confirmation of this outcome in the near future from the AFL.
"To our knowledge, the permission is specific to HiQCell and not necessarily to cell-based therapies in general."
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AFL approves stem-cell therapy
Be The Match donate marrow & cord blood, transplant …
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Marrow transplant patients are at the heart of our mission.
Do a world of good with every mile you ride.
Join us on September 10 from 12-1:15 p.m. CT. for a free telephone education workshop. Learn about the basics of stem cell transplant, HLA matching, how a doctor searches for a donor, caregiver and survivor experiences and resources available to patients.
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Every four minutes, someone is diagnosed with a blood cancer like leukemia. It can happen to anyone, at any time. But so can a curea marrow or cord blood transplant. Learn more about the heart of our missiondelivering cures for blood cancersin our 2013 Report to the Community.
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Whats the difference between adult stem cell taken from body fat and from bone marrow – Video
By LizaAVILA
Whats the difference between adult stem cell taken from body fat and from bone marrow
Whats the difference between adult stem cell taken from body fat and from bone marrow? In conversation with Dr Alok Sharma (MS, MCh.) Professor of Neurosurgery Head of Department, LTMG Hospital...
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Vanderbilt researchers find that coronary arteries hold heart-regenerating cells
By LizaAVILA
PUBLIC RELEASE DATE:
20-Aug-2014
Contact: Craig Boerner craig.boerner@vanderbilt.edu 615-322-4747 Vanderbilt University Medical Center
Endothelial cells residing in the coronary arteries can function as cardiac stem cells to produce new heart muscle tissue, Vanderbilt University investigators have discovered.
The findings, published recently in Cell Reports, offer insights into how the heart maintains itself and could lead to new strategies for repairing the heart when it fails after a heart attack.
The heart has long been considered to be an organ without regenerative potential, said Antonis Hatzopoulos, Ph.D., associate professor of Medicine and Cell and Developmental Biology.
"People thought that the same heart you had as a young child, you had as an old man or woman as well," he said.
Recent findings, however, have demonstrated that new heart muscle cells are generated at a low rate, suggesting the presence of cardiac stem cells. The source of these cells was unknown.
Hatzopoulos and colleagues postulated that the endothelial cells that line blood vessels might have the potential to generate new heart cells. They knew that endothelial cells give rise to other cell types, including blood cells, during development.
Now, using sophisticated technologies to "track" cells in a mouse model, they have demonstrated that endothelial cells in the coronary arteries generate new cardiac muscle cells in healthy hearts. They found two populations of cardiac stem cells in the coronary arteries a quiescent population in the media layer and a proliferative population in the adventitia (outer) layer.
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Vanderbilt researchers find that coronary arteries hold heart-regenerating cells
The Times Have Published Only Half the Story, Says Specialist Stem Cell Bank BioEden
By LizaAVILA
(PRWEB UK) 21 August 2014
The success of stem cell medicine does not depend on funding alone
Funding is of the upmost importance but access to the right material is vital.
Stem Cell Banking of a childs own stem cells for potentially a lifetime of use, is a way of storing their health for their future. So it is vital that the right stem cells are available for treatment when they are needed at any time in their life.
Tony Veverka, Group CEO of specialist stem cell bank BioEden says, "Funding is of the upmost importance so that research can continue, but access to the right material is vital."
Gaining access to the right material for stem cell therapy has dramatically simplified since BioEden pioneered an entirely non-invasive method of taking stem cells from children's baby teeth. No longer is there just the option of stem cells from embryos, bone marrow or cord blood, but the option of taking quality cells from the baby tooth after it has fallen out naturally.
BioEden believes it can cut NHS funding dramatically by individuals banking their own stem cells, and they continue to call for clarity and transparency so that a prolonged and healthier life is accessible to all. http://www.thetimes.co.uk/tto/business/industries/health/article4181168.ece
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The Times Have Published Only Half the Story, Says Specialist Stem Cell Bank BioEden
BioTime Announces Second Quarter 2014 Results and Recent Developments
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ALAMEDA, Calif.--(BUSINESS WIRE)--BioTime, Inc. (NYSE MKT: BTX) today reported financial results for the first quarter ended June 30, 2014 and highlighted recent corporate accomplishments.
We are pleased with our success to date in building toward our goal of developing both near-term commercial applications of our technologies and maintaining our focus on the power of pluripotent stem cells to create innovative human therapeutics, said Dr. Michael D. West, BioTimes Chief Executive Officer. Near-term product development underway includes our subsidiary OncoCyte Corporations three cancer diagnostic products undergoing clinical studies, mobile health product development in our subsidiary LifeMap Solutions, Inc., our Renevia pivotal clinical trial in Europe, steps to prepare for the marketing of our recently FDA-cleared wound healing product Premvia, and growing research product sales by our ESI BIO division.
BioTimes longer-term major therapeutic product opportunities are based on the broad range of cell-based regenerative therapies planned for development from its pluripotent stem cell technology platform. This platform is protected by over 600 patents and patent applications worldwide within the BioTime family of companies. Our subsidiary Asterias Biotherapeutics, Inc. has submitted an amended IND to the FDA for a Phase 1/2a clinical trial of AST-OPC1 for the treatment of cervical spinal cord injury and is currently awaiting clearance from the FDA for that trial. Asterias is also currently undertaking process development of AST-VAC2, a cancer immunotherapy targeting the important antigen called telomerase, for a potential clinical trial in lung cancer. This progress, along with the appointment of Pedro Lichtinger as Asterias CEO and the award of a $14 million grant from the California Institute for Regenerative Medicine, should fuel the development of these first-in-class therapeutic products. Recently, Asterias shares began to trade publicly under the symbol ASTYV, the first of our subsidiaries to have its shares trade publicly. Lastly, we expect that BioTimes subsidiary Cell Cure Neurosciences Ltd. will soon file its IND to begin a clinical trial of OpRegen for the treatment of age-related macular degeneration. Additional important cell-based product development is underway in our disease-focused subsidiaries OrthoCyte Corporation and ReCyte Therapeutics.
As we saw in the first quarter of this year, our expenses have risen compared to recent quarters, but our progress during the second quarter in streamlining our workforce through shared core resources among our subsidiaries should reduce our cash burn rate in the third quarter. We would like to thank those who share our goal of better health in the coming era of regenerative medicine. Their continued support and the diligent efforts of our collaborators at leading academic medical institutions is critical in advancing our products from the lab bench to the clinic, where they are desperately needed.
Second Quarter and Recent Highlighted Corporate Accomplishments
Financial Results
Revenue
For the six months ended June 30, 2014, on a consolidated basis, total revenue was $2.2 million, up $0.3 million or 19% from $1.8 million for the same period one year ago. The increase in revenue is primarily attributable to a $0.4 million increase in grant income primarily from a grant awarded to BioTimes subsidiary Cell Cure Neurosciences Ltd. (Cell Cure Neurosciences) from Israels Office of the Chief Scientist, offset in part by the decline in license fees of $0.1M primarily due to full recognition of the unamortized balance of the Summit license fees received in advance during the fourth quarter of 2013 as a result of the termination of our license agreements with Summit in 2013.
Expenses
Operating expenses for the six months ended June 30, 2014 were $26.0 million, compared to expenses of $18.0 million for the same period of 2013. The increase in operating expenses is primarily attributable to an increase in staffing, and the expansion of research and development efforts, including additional expenses in the Renevia clinical safety trial program, the development of OpRegen by BioTimes subsidiary Cell Cure Neurosciences for the treatment of dry age related macular degeneration, and the increased staffing and operations of Asterias in connection with the Geron stem cell asset acquisition and by LifeMap Solutions. In addition, during the first six months in 2014, operating expenses included $1.5 million of amortization expense of intangible assets recorded in connection with the Geron stem cell asset acquisition in October 2013.
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BioTime Announces Second Quarter 2014 Results and Recent Developments
Cedars-Sinai Heart Institute Opens First-of-its-Kind Research Stem Cell Clinic for Cardiac Patients
By LizaAVILA
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Newswise LOS ANGELES (Aug. 12, 2014) Regenerative medicine experts at the Cedars-Sinai Heart Institute have opened a new clinic to evaluate heart and vascular disease patients for participation in stem cell medical studies.
Led by Eduardo Marbn, MD, PhD, director of the Cedars-Sinai Heart Institute, and Timothy Henry, MD, director of the Heart Institutes Cardiology Division, the doctors and researchers at the Cedars-Sinai Heart Institute Regenerative Medicine Clinic use a scientific approach to assess the possible benefits of stem cells to repair damaged or diseased cardiovascular tissues. The clinic is believed to be the first at a major U.S. academic medical center dedicated to matching patients with appropriate stem cell clinical trials, whether those research interventions are available at the medical center or at other institutions.
The Heart Institute Regenerative Medicine Clinic offers consultative services for patients with heart and vascular disease who may qualify for investigative stem cell therapy. The goal is to provide research options to patients who remain symptomatic on their current management regimen, or for patients with stable heart disease who are concerned about disease progression.
Over the past decade, medical experts have predicted that in the future, stem cell therapies would transform heart disease treatment and save lives, said Shlomo Melmed, MD, dean of the Cedars-Sinai faculty and the Helene A. and Philip E. Hixon Distinguished Chair in Investigative Medicine. At Cedars-Sinai, we have a track record of successfully directing cardiac stem cell studies as well as transferring innovations from the laboratory to the patient bedside.
In 2009, Marbn and his team completed the worlds first procedure in which a patients own heart tissue was used to grow specialized heart stem cells. The specialized cells were then injected back into the patients heart in an effort to repair and re-grow healthy muscle in a heart that had been injured by a heart attack. Results, published in The Lancet in 2012, showed that one year after receiving the stem cell treatment, heart attack patients demonstrated a significant reduction in the size of the scar left on the heart muscle after a heart attack.
Henry has served as principal investigator of multiple large, multicenter trials in acute coronary syndromes, myocardial infarction and angiogenesis, including several ongoing cardiovascular stem cell trials. He also is principal investigator for one of seven NIH Clinical Cardiovascular Stem Cell Centers.
Our goal is to help make stem cells a regular treatment option for heart disease, Henry said. Right now, many patients with advanced heart disease have limited treatment options. Stem cells offer not only hope but a real chance of a game-changing treatment.
As part of each patients assessment in the Heart Regenerative Medicine Clinic, physicians will evaluate patients interested in participating in stem cell clinical trials at Cedars-Sinai and, for patients willing to travel at other medical institutions across the nation. For patients willing to travel to participate in research, Cedars-Sinai physicians will work closely with investigators at other centers to expedite referrals and seamlessly transfer all relevant medical records.
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Cedars-Sinai Heart Institute Opens First-of-its-Kind Research Stem Cell Clinic for Cardiac Patients
Spinal injury patients needed for stem cell treatment study
By LizaAVILA
SAN DIEGO The UC San Diego Health System put out a call Monday for eight spinal cord injury patients to take part in a five-year test of the safety of a new treatment involving neural stem cells.
The researchers are looking for people who suffered an injury to the middle or lower levels of the spines thoracic vertebrae between one and two years ago. According to UCSD, the injury must be between the seventh and 12th thoracic vertebrae.
The goal of this study is to evaluate the safety of transplanting neural stem cells into the spine for what one day could be a treatment for spinal cord injuries, said Dr. Joseph Ciacci, the studys principal investigator and a neurosurgeon at UC San Diego Health System. The studys immediate goal, however, is to determine whetherinjecting these neural stem cells into the spine of patients with spinal cord injury is safe.
The doctors also want to know how long the transplanted stem cells will last, and whether drugs designed to prevent rejection by the immune system are effective, according to UCSD Health.
The researchers will also look for possible changes in motor and sensory function, bowel and bladder function, and pain levels.
The stem cells were tested in laboratory rats by Ciacci and Dr. Martin Marsala, of the UC San Diego School of Medicine. They detected signs of improved motor function with minimal side effects. The cells have also been tested for safety in human patients with amyotrophic lateral sclerosis commonly known as ALS or Lou Gehrigs Disease.
UCSD cautioned prospective test subjects that since human tests are just beginning, unforeseen risks, complications or unpredictable outcomes are possible.
The clinical trial at UC San Diego Health System is funded by Neuralstem Inc. and was launched and supported by the UC San Diego Sanford Stem Cell Clinical Center. The center was recently created to advance leading-edge stem cell medicine and science, protect and counsel patients, and accelerate innovative stem cell research into patient diagnostics and therapy, according to UCSD.
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Blood cells are new, unexpected source of neurons in crayfish
By LizaAVILA
17 hours ago The red swamp crayfish (Procambarus clarkii) is native to the southeastern United States. This species is a popular model organism for studies of the nervous system, and has been used to study fundamental mechanisms involved in the production of new neurons in the adult brain. Credit: Jeanne Benton
Researchers have strived for years to determine how neurons are produced and integrated into the brain throughout adult life. In an intriguing twist, scientists reporting in the August 11 issue of the Cell Press journal Developmental Cell provide evidence that adult-born neurons are derived from a special type of circulating blood cell produced by the immune system. The findingswhich were made in crayfishsuggest that the immune system may contribute to the development of the unknown role of certain brain diseases in the development of brain and other tissues.
In many adult organisms, including humans, neurons in some parts of the brain are continually replenished. While this process is critical for ongoing health, dysfunctions in the production of new neurons may also contribute to several neurological diseases, including clinical depression and some neurodegenerative disorders. Dr. Barbara Beltz of Wellesley College and her colleagues studied crayfish to understand how new neurons are made in adult organisms. When they marked the cells of one crayfish and used this animal as a blood donor for transfusions into another crayfish, the researchers found that the donor blood cells could generate neurons in the recipient.
"These blood cellscalled hemocyteshave functions similar to certain white blood cells in mammals and are produced by the immune system in a blood-forming organ that is functionally analogous to bone marrow," explains Dr. Beltz. "When these cells are released into the circulation, they are attracted to a specialized region in the brain where stem cells divide, and their descendants develop into functional neurons."
The current work demonstrates that the immune system can produce cells with stem cell properties that can give rise to different types of cells, including both hemocytes and nerve cells. "Our findings in crayfish indicate that the immune system is intimately tied to mechanisms of adult neurogenesis, suggesting a much closer relationship between the immune system and nervous system than has been previously appreciated," says co-author Dr. Irene Sderhll, of Uppsala University in Sweden. The flexibility of these immune cells in producing neurons in adult animals raises the intriguing possibility of the presence of similar types of flexibility in other animals. If further studies demonstrated a similar relationship between the immune system and brain in mammals, the findings would stimulate a new area of research into immune therapies to target neurological diseases.
Explore further: New discovery on early immune system development
More information: Developmental Cell, Benton et al.: "Cells from the immune system generate adult-born neurons in crayfish." http://www.cell.com/developmental-cel 1534-5807(14)00405-5
Journal reference: Developmental Cell
Provided by Cell Press
Researchers at Lund University have shed light on how and when the immune system is formed, raising hope of better understanding various diseases in children, such as leukaemia.
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Blood cells are new, unexpected source of neurons in crayfish
Stem cell stroke therapy shows promise after first human trial
By LizaAVILA
A pilot study undertaken by researchers from Imperial College Healthcare NHS Trust and Imperial College London has shown promise in rapid treatment of serious strokes. The study, the first of its kind published in the UK, treated patients using stem cells from bone marrow.
Imagine a perfectly ordinary beginning to your day, say burned toast, no matching pair of socks and the usual damp commute to work. Except at some point through the usual minutiae you suffer a massive stroke. If you dont die outright, you may soon afterwards. Even supposing you survive those first days or weeks, the chance of your life resuming its comforting tedium is impossibly remote. You may need assistance for the rest of your shortened life.
According to the Stroke Association, about 152,000 people suffer a stroke in the UK alone each year. However, the five patients treated in the recent Imperial College pilot study all showed improvements. According to doctors, four of those had suffered the most severe kind of stroke, which leaves only four percent of people alive or able to live independently six months after the event. All four of the patients were alive after six months.
A particular set of CD34+ stem cells was used, as they help with the production of blood cells and blood vessels lining cells. These same cells have been found to improve the effects of stroke in animals, and they assist in brain tissue and blood growth in the affected areas of the brain. The CD34+ cells were isolated from samples taken from patients bone marrow and then infused into the affected area via an artery that leads to the brain, using keyhole surgery.
The innovative stem cell treatment differs from others in one important way: patients are treated within seven days of their stroke, rather than six months hence. The stroke sufferers all recorded improvements in terms of clinical measures of disability, despite four of the five having suffered the most severe kind of stroke.
It's still early days for the research, and much more will need to be done to expand clinical trials, but eventually it is hoped that a drug may be developed that can be administered to stroke sufferers as soon as they are admitted to hospital. This could ameliorate longer term effects and allow for speedier recovery and a faster entry into therapy.
A paper detailing the research was published in journal Stem Cells Translational Medicine.
Source: Imperial College London
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Stem cell stroke therapy shows promise after first human trial
India needs more bone marrow donors: Harsh Vardhan
By LizaAVILA
Union Health Minister Harsh Vardhan Wednesday called upon citizens to voluntarily register themselves as bone marrow donors to help enhance the chances of patients with blood cancer and other blood-related diseases get genetically compatible donors.
"Unlike blood donation, in the case of unrelated donor, the chances are one in a million that a donor's Human Leukocyte Antigen (HLA) will match with the needy patient's. Therefore, there is a requirement of having millions of registered donors," Vardhan said while speaking at the launch of a "Public Initiative of Bone Marrow Donation" at All India Institute of Medical Science (AIIMS) here.
A willing donor can register himself at the Asian Indian Donor Marrow Registry (AIDMR) at AIIMS. He will have to undergo an initial test done for which 10 ml of blood is taken. The test is called HLA typing.
In case they turn out to be HLA match for the needy patient, they will be requested to donate their bone marrow or peripheral blood stem cells to patients of blood-cancer and other disorders, he said.
Vardhan said the health ministry will soon start a facility for the bone marrow donation in Safdurjung Hospital, which will intensify the initiative for bone marrow donation in the country.
"There is a need for the NGOs and several other health organisations to spread awareness in the society to curb all kinds of myths and superstitions that deter the individuals from being donors, which is a noble cause," he said.
On the occasion, Vardhan registered himself as a bone marrow donor and gave his blood sample for the HLA testing.
"One should at least understand that for the patients suffering from blood-related diseases like blood cancer, leukaemia, thalassemia, anaemia and many other diseases, a simple commitment to donate bone marrow can save a patient's life at the cost of nothing," Vardhan told IANS.
The AIDMR at AIIMS has set a target of registering 100,000 bone marrow donors in the first year and expand the register up to half a million donors in the next five years.
Vardhan also called for donation of body organs and cadavers, which can save life of the needy patients, and also serve the purposes of medical research.
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India needs more bone marrow donors: Harsh Vardhan
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