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ISSN: 2157-7633

Journal of Stem Cell Research & Therapy
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Research Article

Neurosteroid Hormones Modulate the Differentiation of Adult Human Multipotent Mesenchymal Stromal Cells

B. I. Tiftikcioglu1, C. M. Rice2, R. Karabudak3 and N. J. Scolding2*

1Hacettepe University School of Medicine, Department of Neurology, Ankara, Turkey

2University of Bristol, Institute of Clinical Neurosciences, Frenchay Hospital, Bristol, UK

3Hacettepe University School of Medicine, Department of Neurology, Neuroimmunology Unit, Ankara, Turkey

*Corresponding Author:
Professor Neil J. Scolding PhD FRCP
Burden Professor of Clinical Neurosciences
University of Bristol Institute of Clinical Neurosciences
Department of Neurology, Frenchay Hospital, Bristol, BS16 1LE, UK
Tel: +44 (0) 117 970 1212
Fax: +44 (0) 117 975 3824
E-mail: [email protected]

Received date: December 04, 2011; Accepted date: January 04, 2011; Published date: January 06, 2012

Citation: Tiftikcioglu BI, Rice CM, Karabudak R, Scolding NJ (2012) Neurosteroid Hormones Modulate the Differentiation of Adult Human Multipotent Mesenchymal Stromal Cells. J Stem Cell Res Ther S4:003. doi:10.4172/2157-7633.S4-003

Copyright: © 2012 Tiftikcioglu BI, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Objective: To examine the effect of neurosteroids on human multipotent mesenchymal stromal cell (hMSCs) neuroglial differentiation.   Materials and methods: Human MSCs were isolated and expanded in vitro. The expression of neurosteroid receptors by hMSCs was examined using immunocytochemistry and the effect of neurosteroids on the proliferation and differentiation of hMSCs was investigated using immunocytochemistry and the 3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyl tetrazolium bromide (MTT) survival assay.   Results: Human MSCs express receptors for neurosteroids. Nestin expression is decreased by neurosteroids. Neurosteroids also exert differential effects depending on the gender of the hMSC donor; dihydrotestosterone (DHT) was responsible for maximal A2B5 expression in hMSCs from male donors whereas 17-β estradiol (E2) exerted the greatest effect on differentiation of ‘female’ hMSCs. Maximal effects of E2 and DHT were observed at a concentration of 100nM, progesterone (PROG) at 250nM. The neurosteroid-induced increase in oligodendroglial differentiation was abrogated by specific receptor antagonists for E2, PROG and DHT. High concentrations of neurosteroids were toxic for hMSCs, irrespective of gender.   Conclusions: These results suggest a significant role for neurosteroid hormones in the differentiation of hMSCs and may have important implications for the development of MSC transplantation therapy for multiple sclerosis and in autoimmune diseases.  

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