Abstract
Backgrounds
Type I diabetes mellitus (T1DM), an autoimmune disease, is associated with insulin deficiency due to the death of -cells. Bone marrowderived mesenchymal stem cells (BM-MSCs) are capable of tissue repair and thus are a promising source of -cell surrogates.
Methods
In this study, the therapeutic potential of BM-MSCs as -cell replacements was analyzed both in vitro and in vivo. First, we used retinoic acid (RA) to induce rat BM-MSCs to differentiate into cells of endodermal/pancreatic lineage. Then, differentiated rat BM-MSCs were syngeneically injected under the renal capsule of rats.
Results
Analysis of gene expression revealed that rat BM-MSCs showed signs of early pancreatic development, and differentiated cells were qualitatively and quantitatively confirmed to produce insulin in vitro. In vivo study was performed for short-term (3 weeks) and long-term (8 weeks) period of time. Rats that were injected with differentiated MSCs exhibited a reduction in blood glucose levels throughout 8 weeks, and grafted cells survived in vivo for at least 3 weeks.
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