Mesenchymal stem cells (MSC) immunomodulation in Type I Diabetes Mellitus
JooHyun Julie Oh
Type 1 diabetes mellitus (T1DM) is caused by autoimmune destruction of pancreatic islet β cells, which results in loss of insulin production and secretion1. Approximately 1.25 million Americans have T1DM in the United States and incidence is increasing at a rate of 3-4% every year, notably among children2. Current T1DM standard treatment is exogenous insulin administration by administration by either insulin pump or multiple daily injections. These daily insulin therapy does not provide a cure and more problematically may lead to hypoglycemic episodes that can lead to devastating complications of retinopathy, nephropathy, and neuropathy3. Mesenchymal stem cells (MSCs) have been in the spotlight as an innovative approach to T1DM cure because of their multipotency, self-renewal, low immunogenicity and high immunomodulatory properties4. In this paper, we bridge together mechanism with numerous pre-clinical and clinical studies of MSC treatment in T1DM for the readers. In hopes of doing so, we discuss the following: mechanism behind the MSCs immunomodulation that allows it to be an efficient treatment for T1DM, in vivo studies with non-obese diabetic mice that demonstrates successful T1DM treatment from MSC transplantation, study that addresses the limitation of MSC treatment, and clinical trials that suggests well tolerance and immunomodulatory effect of MSC treatment. Significance from these studies points to that Th2 cells confer protection against Th1- mediated destruction of beta cells5, MSC transplantation alone can lead to successful treatment for T1DM6, even in human populations, and MSC can successfully change T1DM prognosis by delaying disease evolution or even reversing the it7.
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