Aberrant ?-Adrenergic Hypertrophic Response in Cardiomyocytes from Human Induced Pluripotent Cells
  • Metaadatok
Tartalom: http://www.cell.com/stem-cell-reports/abstract/S2213-6711...
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Article
Cím:
Aberrant ?-Adrenergic Hypertrophic Response in Cardiomyocytes from Human Induced Pluripotent Cells
Létrehozó:
Földes, Gábor
Matsa, Elena
Kriston-Vizi, János
Leja, Thomas
Amisten, Stefan
Arányi, Tamás
Dátum:
2014
Téma:
R1 Medicine (General) / orvostudomány általában
Tartalmi leírás:
Cardiomyocytes from human embryonic stem cells (hESC-CMs) and induced pluripotent stem cells (hiPSC-CMs) represent new models for drug discovery. Although hypertrophy is a high-priority target, we found that hiPSC-CMs were systematically unresponsive to hypertrophic signals such as the ?-adrenoceptor (?AR) agonist phenylephrine (PE) compared to hESC-CMs. We investigated signaling at multiple levels to understand the underlying mechanism of this differential responsiveness. The expression of the normal ?1AR gene, ADRA1A, was reversibly silenced during differentiation, accompanied by ADRA1B upregulation in either cell type. ADRA1B signaling was intact in hESC-CMs, but not in hiPSC-CMs. We observed an increased tonic activity of inhibitory kinase pathways in hiPSC-CMs, and inhibition of antihypertrophic kinases revealed hypertrophic increases. There is tonic suppression of cell growth in hiPSC-CMs, but not hESC-CMs, limiting their use in investigation of hypertrophic signaling. These data raise questions regarding the hiPSC-CM as a valid model for certain aspects of cardiac disease. In this article, Fo¨ldes and colleagues show that hiPSC-derived cardiomyocytes are relatively unresponsive to ?-adrenergic hypertrophic signals compared to hESC cardiomyocytes. The main difference in hiPSC-CMs that accounts for the defective response is the suppression of growth by tonic antihypertrophic pathways. Superficial similarities in phenotype between cardiomyocytes derived from hESCs or hiPSCs may mask complex differences in signaling.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Földes, Gábor and Matsa, Elena and Kriston-Vizi, János and Leja, Thomas and Amisten, Stefan and Arányi, Tamás (2014) Aberrant ?-Adrenergic Hypertrophic Response in Cardiomyocytes from Human Induced Pluripotent Cells. STEM CELL REPORTS, 3 (5). pp. 905-914.
Kapcsolat: