Therapeutic effects of late outgrowth endothelial progenitor cells or mesenchymal stem cells derived from human umbilical cord blood on infarct repair

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• 作者：Sung-Whan Kim^a ; ^b ; ¹ ; Hong Lian Jin^c ; ¹ ; Seok-Min Kang^d ; Sinyoung Kim^e ; Kyung-Jong Yoo^f ; Yangsoo Jang^c ; Hyun Ok Kim^e ; ^{Hyunok1019@yuhs.ac" class="auth_mail" title="E-mail the corresponding author} ; Young-sup Yoon^a ; ^g ; ^{yyoon5@emory.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Umbilical cord blood ; Late outgrowing endothelial progenitor cells ; Mesenchymal stem cells ; Acute myocardial infarction ; Angiogenesis
• 刊名：International Journal of Cardiology
• 出版年：2016
• 出版时间：15 January 2016
• 年：2016
• 卷：203
• 期：Complete
• 页码：498-507
• 全文大小：2199 K

文摘

This study sought to systematically investigate the derivation of late outgrowth endothelial progenitor cells (late EPC) and mesenchymal stem cells (MSC) from umbilical cord blood (UCB) and to examine their therapeutic effects on myocardial infarction (MI).

Methods

The expression of angiogenic genes was determined by qRT-PCR. Myocardial infarction (MI) was induced in rats, and cells were directly transplanted into the border regions of ischemic heart tissue.

Results

Culture of UCB mononuclear cells yielded two distinct types of cells by morphology after 2 weeks in the same culture conditions. These cells were identified as late EPC and MSC, and each was intramyocardially injected into rat hearts after induction of MI. Echocardiography and histologic analyses demonstrated that both EPC and MSC improved cardiac function and enhanced vascularization, although fibrosis was reduced only in the EPC transplanted hearts. Different paracrine factors were enriched in EPC and MSC. However, once injected into the hearts, they induced similar types of paracrine factors in the heart. Transplanted EPC or MSC were mostly localized at the perivascular areas. This study demonstrated that EPC and MSC can be simultaneously derived from UCB under the same initial culture conditions, and that common paracrine factors are involved in the repair of MI.

Conclusion

Late EPC and MSC are effective for infarct repair, apparently mediated through common humoral mechanisms.