ScienceDaily (Nov. 10, 2009) — Human embryonic stem cells could help people with learning and memory deficits after radiation treatment for brain tumors, suggests a new UC Irvine study.
Research with rats found that transplanted stem cells restored learning and memory to normal levels four months after radiotherapy. In contrast, irradiated rats that didn't receive stem cells experienced a more than 50 percent drop in cognitive function.
"Our findings provide the first evidence that such cells can be used to ameliorate radiation-induced damage of healthy tissue in the brain," said Charles Limoli, UCI radiation oncology associate professor and senior author of the study, appearing online the week of Nov. 9 in the Proceedings of the National Academy of Sciences.
Radiotherapy for brain tumors is limited by how well the surrounding tissue tolerates the treatment. In receiving radiation at levels needed to treat tumors, patients suffer varying degrees of learning and memory impairment that can affect their quality of life.
"It's a progressive, debilitating side effect of cranial irradiation," Limoli said. "Any treatments showing promise at reversing this are worthy of pursuit."
In the UCI study, stem cells were transplanted into the heads of rats that had undergone radiation treatment. They migrated to a brain region known to support the growth of neurons, scientists observed, and developed into new brain cells.
Work is under way to determine how the transplanted stem cells improved cognition: Did they integrate into healthy tissue or did they help repair and support existing brain cells?
Said Limoli: "With further research, stem cells may one day be used to manage a variety of adverse conditions associated with radiotherapy."
In addition to Limoli, UCI scientists Munjal Acharya, Lori-Ann Christie, Mary Lan, Peter Donovan and Carl Cotman worked on this study, in collaboration with John Fike of UC San Francisco. The UCI researchers are from the departments of radiation oncology, biological chemistry, and developmental & cell biology; the Institute for Memory Impairments and Neurological Disorders, or UCI MIND; and the Sue & Bill Gross Stem Cell Research Center.
The study was supported by grants from the California Institute for Regenerative Medicine and the National Institutes of Health.
I've been using umbilical cord stem cells on my patients for over 15 years and I had to use a lot of them to see some results, but I never got close to the results that I see using Stemaid's stem cells.Dr C.
Thank you Stemaid. Your embryonic stem cells reduced my elevated CA-19-9 pancreatic tumour markers to normal levels and lower. So grateful.Brent J.
My PSA was at 21 when I started Stemaid's program. After two weeks of their rejuvenation protocol it was at 11.Tom F.
They said the refraction was 40 percent! My refraction hasn't been that good for at least 15 to 20 years.Randy (Heart Disease)
There isn't any doubt in my mind that Stemaid saved our daughter's life.Laura G. (Lyme Protocol)
I thank God everyday for helping me find the remarkable positive effects that were possible through Stemaid treatments.Charlene L (Heart Disease)
It was the single best decision that I have made in my life!Susan V. (Lyme Protocol)
The best stem cells in the world! Pluripotent and can message all cells in your body to regenerate. Excretes a protein that is anti-tumor and cancer. I highly recommend Stemaid.Tracy C. (Lyme Protocol)
Whether you're a patient seeking stem cell therapy or a doctor seeking stem cells for your patients, please feel free to get in touch with us.
Call Us 1-844-STEMAID (toll-free) 1-800-277-3132 (toll-free) 1-310-739-6991 (outside USA)