The last decade has witnessed an explosion of literature in the field of mesenchymal stem cells (MSCs) contesting their promise as a source of reparative cells. MSC-based therapies are being evaluated for the treatment of a broad array of ischemic, inflammatory, and immunological disorders in over 252 registered clinical trials rapidly increasing in number and scope.
MSCs are a rare population of cells first isolated from bone marrow and subsequently from various tissues. Their extensive potential to partake in the anatomy and physiology of distant organs has been linked to secretion of paracrine-acting angiogenic, trophic, anti-inflammatory, and immunomodulatory factors. The rationale for their use is based on their ability to: migrate to the site of injury, differentiate into cell lineages, release cell survival/ proliferation factors, and modulate immune response/inflammation. Different protocols for MSCs preparation and transplantation and their variability may often account for the discordant results in clinical trials.
Risk for chromosomal aberrations,neoplastic transformation, increased telomerase activity has been reported for human MSCs in the experimental setting. Hence it is paramount to have specific quality control and safety criteria mandates, follow standardized GMP conditions for: cell processing, conduct of preclinical animal models, meaningful phase I/II clinical trials, before advent into therapeutics. Although researchers continue to remain skeptical about the actual mechanism of repair, the ease of culture isolation of MSCs, their moderate side effects in on-going trials, and their pleiotropic functions make them promising candidates to usher in the next generation of cell based therapeutics.
Dr. Bhat made his valuable remarks at 3rd World Congress on Cell Science & Stem Cell Research held during Nov 20-22, 2013 in DoubleTree by Hilton Baltimore hosted by OMICS Group Conferences.