期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 291, 期 30, 页码 15841-15852出版社
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M115.684118
关键词
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资金
- Fonds de la Recherche Scientifique Medicale of Belgium
- Action de Recherche Concertee of the Communaute Francaise de Belgique, an Interuniversity Attraction Pole grant from the Politique Scientifique Federale [IAP-P7/40]
- Prime Minister's Office, Federal Service for Science, Technology and Culture
- Fonds Lokumo
- European Community [LSHB-2003-503337]
- Fonds National de la Recherche Scientifique/FRIA, Belgium
- Universite libre de Bruxelles, Belgium
The study of the mechanisms leading to cardiac hypertrophy is essential to better understand cardiac development and regeneration. Pathological conditions such as ischemia or pressure overload can induce a release of extracellular nucleotides within the heart. We recently investigated the potential role of nucleotide P2Y receptors in cardiac development. We showed that adult P2Y(4)-null mice displayed microcardia resulting from defective cardiac angiogenesis. Here we show that loss of another P2Y subtype called P2Y(6), a UDP receptor, was associated with a macrocardia phenotype and amplified pathological cardiac hypertrophy. Cardiomyocyte proliferation and size were increased in vivo in hearts of P2Y(6)-null neonates, resulting in enhanced postnatal heart growth. We then observed that loss of P2Y(6) receptor enhanced pathological cardiac hypertrophy induced after isoproterenol injection. We identified an inhibitory effect of UDP on in vitro isoproterenol-induced cardiomyocyte hyperplasia and hypertrophy. The present study identifies mouse P2Y(6) receptor as a regulator of cardiac development and cardiomyocyte function. P2Y(6) receptor could constitute a therapeutic target to regulate cardiac hypertrophy.
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