Journal
STEM CELLS
Volume 32, Issue 10, Pages 2799-2810Publisher
WILEY-BLACKWELL
DOI: 10.1002/stem.1763
Keywords
Calcium flux; Immunosuppression; Mesenchymal stem cells; siRNA; T cells; Stem cell transplantation; gp130; Experimental models
Categories
Funding
- 973 program
- National Natural Science Foundation of China [2012CB917100, 2014CB541905, 2010CB529704, 91029730, 31330026]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Science and Technology Commission of Shanghai Municipality [09140902600]
- Leading Academic Discipline Project of the Shanghai Municipal Education Commission [J50208, J50207]
- Shanghai Pujiang Program [10PJ407300]
- Shanghai Committee of Science and Technology [11DZ2260200]
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Mesenchymal stem cells (MSCs) have demonstrated promising therapeutic potential for a variety of diseases including autoimmune disorders. A fundamental requirement for MSC-mediated in vivo immunosuppression is their effective trafficking. However the mechanism underlying MSC trafficking remains elusive. Here we report that skin-derived MSCs (S-MSCs) secrete high levels of interleukin-6 (IL-6) in inflammatory conditions. Disruption of the il6 or its signaling transducer gp130 blocks voltage-gated calcium (Ca2+) channels (VGCC) critically required for cell contraction involved in the sequential adhesion and de-adhesion events during S-MSC migration. Deletion of il6 gene leads to a severe defect in S-MSC's trafficking and immunosuppressive function in vivo. Thus, this unexpected requirement of autocrine IL-6 for activating Ca2+ channels uncovers a previously unrecognized link between the IL-6 signaling and the VGCC and provides novel mechanistic insights for the trafficking and immunomodulatory activities of S-MSCs.
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