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- W1153313479 abstract "Background/Aims: CD117+ stem cell (SC) based therapy is considered an alternative therapeutic option for terminal heart disease. However, controversies exist on the effects of CD117+ SC implantation. In particular, the link between CD117+ SC function and angiotensin-II-type-2 receptor (AT2R) after MI is continuously discussed. We therefore asked whether 1) AT2R stimulation influences CD117+ SC properties in vitro and, 2) which effects can be ascribed to AT2R stimulation in vivo. Methods: We approached AT2R stimulation with Angiotensin II while simultaneously blocking its opponent receptor AT1 with Losartan. CD117 effects were dissected using a 2D-Matrigel assay and HL-1 co-culture in vitro. A model of myocardial infarction, in which we implanted EGFP+ CD117 SC, was further applied. Results: While we found indications for AT2R driven vasculogenesis in vitro, co-culture experiments revealed that CD117+ SC improve vitality of cardiomyocytes independently of AT2R function. Likewise, untreated CD117+ SC had a positive effect on cardiac function and acted cardioprotective in vivo. Conclusions: Therefore, our data show that transient AT2R stimulation does not significantly add to the beneficial actions of CD117+ SC in vivo. Yet, exploiting AT2R driven vasculogenis via an optimized AT2R stimulation protocol may become a promising tool for cardiac SC therapy." @default.
- W1153313479 created "2016-06-24" @default.
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- W1153313479 date "2015-01-01" @default.
- W1153313479 modified "2023-09-27" @default.
- W1153313479 title "Exploiting AT2R to Improve CD117 Stem Cell Function In Vitro and In Vivo - Perspectives for Cardiac Stem Cell Therapy" @default.
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- W1153313479 doi "https://doi.org/10.1159/000430335" @default.
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