한빛사논문
- 조회2,052
Abstract
Jooyeon Park1, Yong Sook Kim2, Seungmi Ryu3, Wan Seok Kang2, Subeom Park4, Jin Han1, Hae Chang Jeong2, Byung Hee Hong4, Youngkeun Ahn2,* and Byung-Soo Kim1,3,5,*
1 School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea
2 Department of Cardiology, Chonnam National University Hospital, Gwangju, Republic of Korea
3 Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, Republic of Korea
4 Department of Chemistry, Seoul National University, Seoul, Republic of Korea
5 Bio-MAX Institute, Institute of Chemical Processes, Engineering Research Institute, Seoul National University, Seoul, Korea
*Corresponding author : Youngkeun Ahn, Byung-Soo Kim
J.P. and Y.S.K. contributed equally to this work.
Abstract
Stem cell therapy has emerged as a potential modality for myocardial infarction treatment. Mesenchymal stem cells (MSCs) exert reparative actions in the injured myocardium mainly through the secretion of paracrine factors. In addition, the overexpression of connexin 43 (Cx43), a gap junction protein, promotes cardiac repair and function restoration. It is known that MSCs in a spheroid form, which have enhanced cell-cell interaction, exhibit enhanced expression of paracrine factors and Cx43. However, cell-extracellular matrix (ECM) interactions, which also contribute to growth factor expression, are very limited in MSC spheroids. Reduced graphene oxide (RGO) shows high affinity toward ECM proteins, such as fibronectin (FN), and high electrical conductivity. In this study, by incorporating FN-adsorbed RGO flakes into MSC spheroids, it is possible to enhance the cell-ECM interactions and, subsequently, the paracrine factor expression in the MSCs in spheroids. Cx43 is also upregulated likely due to the enhanced paracrine factor expression and electrical conductivity of RGO. The injection of MSC-RGO hybrid spheroids into the infarcted hearts enhances cardiac repair compared with the injection of RGO flakes or MSC spheroids. This study demonstrates that RGO can effectively improve the therapeutic efficacy of MSCs for ischemic heart diseases.
Keywords: gap junction; graphene; growth factors; myocardial infarction; spheroids
논문정보
- Research article
- 2015년 03월 (BRIC 등록일 2015-03-31)
- 국내 연구진
- 바이오·의료융합 > 바이오센싱 및 나노바이오물질
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