Bone Marrow Stem Cell Co-transplantation Prevents Embryonic Stem Cell Transplant-associated Tumors


ScienceDaily (May 11, 2009) — Transplanted embryonic stem cells are recognized as a potential treatment for patients suffering from the effects of spinal cord injury (SCI). However, in studies using embryonic stem cells transplanted into SCI laboratory animals, a serious drawback has been the development of tumors following transplantation.

Publishing in the current issue of Cell Transplantation (Vol. 18 No.1), a team of Japanese researchers describe their study that demonstrates a way to eliminate the problem of tumor growth by co-transplanting bone marrow stem cells (BMSCs) along with embryonic stem cells.

"Our study results suggest that co-transplanting BMSCs induce undifferentiated embryonic stem cells to differentiate into a neuronal lineage by neurotrophic factor production, resulting in suppression of tumor formation in SCI model mice," said corresponding author Dr. Masahide Yoshikawa of the Nara Medical University. "The known multipotency of BMSCs during differentiation and their known ability to produce neurotrophic factors, such as nerve growth factor, led us to speculate that co-transplantation of ES cells and BMSCs would provide an advantage over transplantation of ES cells alone."

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http://www.sciencedaily.com/releases...0511122420.htm