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Journal of Molecular Medicine

, Volume 90, Issue 9, pp 997–1010 | Cite as

Stem cell-based delivery of Hypoxamir-210 to the infarcted heart: implications on stem cell survival and preservation of infarcted heart function

  • Ha Won Kim
  • Shujia Jiang
  • Muhammad Ashraf
  • Khawaja Husnain HaiderEmail author
Original Article

Abstract

This study seeks to test our hypothesis that transgenic induction of miR-210 in mesenchymal stem cells (MSC) simulates the pro-survival effects of ischemic preconditioning (IPC) and that engraftment of PCMSC helps in the functional recovery of ischemic heart by miR-210 transfer to host cardiomyocytes through gap junctions. miR-210 expression in MSC was achieved by IPC or nanoparticle-based transfection of miR-210 plasmid (miRMSC) and functional recovery of the infarcted heart of rat transplanted with PCMSC or miRMSC was evaluated. Both PCMSC and miRMSC showed higher survival under lethal anoxia as compared to non-PCMSC and scramble-transfected MSC (ScMSC) controls with concomitantly lower CASP8AP2 expression. Similarly, both PCMSC and miRMSC survived better and accelerated functional recovery of ischemic heart post-transplantation. To validate our hypothesis that MSC deliver miR-210 to host cardiomyocytes, in vitro co-culture between cardiomyocytes and PCMSC or miRMSC (using non-PCMSC or ScMSC as controls) showed co-localization of miR-210 with gap-junctional connexin-43. miR-210 transfer to cardiomyocytes was blocked by heptanol pretreatment. Moreover, higher survival of cardiomyocytes co-cultured with PCMSC was observed with concomitant expression of CASP8AP2 as compared to cardiomyocytes co-cultured with non-PCMSC thus suggesting that miR-210 was translocated from MSC to protect host cardiomyocytes. Induction of miR-210 in MSC promoted their survival post-engraftment in the infarcted heart. Moreover, direct transfer of pro-survival miR-210 from miRMSC to host cardiomyocytes led to functional recovery of the ischemic heart.

Keywords

Connexin-43 miR-210 Myocardium Preconditioning Stem cells 

Notes

Acknowledgments

This work was supported by NIH Grants# [R37 HL074272; HL-087246(M.A) and HL-087288; HL-089535; HL106190-01(Kh.H.H)].

Disclosure statement

Nothing to disclose.

Supplementary material

109_2012_920_MOESM1_ESM.pdf (4.3 mb)
ESM 1 (PDF 4436 kb)

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Ha Won Kim
    • 1
  • Shujia Jiang
    • 1
  • Muhammad Ashraf
    • 1
  • Khawaja Husnain Haider
    • 1
    Email author
  1. 1.Department of PathologyUniversity of CincinnatiCincinnatiUSA

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