cxcr4 and cxcr7 play distinct roles in cardiac lineage specification and pharmacologic β-adrenergic response
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2017
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Abstract
CXCR4 and CXCR7 are prominent G protein-coupled receptors (GPCRs) for chemokine stromal cell-derived factor-1 (SDF-1/CXCL12). This study demonstrates that CXCR4 and CXCR7 induce differential effects during cardiac lineage differentiation and β-adrenergic response in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). Using lentiviral vectors to ablate CXCR4 and/or CXCR7 expression, hiPSC-CMs were tested for phenotypic and functional properties due to gene knockdown. Gene expression and flow cytometry confirmed the pluripotent and cardiomyocyte phenotype of undifferentiated and differentiated hiPSCs, respectively. Although reduction of CXCR4 and CXCR7 expression resulted in a delayed cardiac phenotype, only knockdown of CXCR4 delayed the spontaneous beating of hiPSC-CMs. Knockdown of CXCR4 and CXCR7 differentially altered calcium transients and β-adrenergic response in hiPSC-CMs. In engineered cardiac tissues, depletion of CXCR4 or CXCR7 had opposing effects on developed force and chronotropic response to β-agonists. This work demonstrates distinct roles for the SDF-1/CXCR4 or CXCR7 network in hiPSC-derived ventricular cardiomyocyte specification, maturation and function.
| Reference Key |
ceholski2017stemcxcr4
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|---|---|
| Authors | ;Delaine K. Ceholski;Irene C. Turnbull;Venu Pothula;Laura Lecce;Andrew A. Jarrah;Changwon Kho;Ahyoung Lee;Lahouaria Hadri;Kevin D. Costa;Roger J. Hajjar;Sima T. Tarzami |
| Journal | journal of energy chemistry |
| Year | 2017 |
| DOI |
10.1016/j.scr.2017.06.015
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| URL | |
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