Activation of Hydroxy-carboxylic Acid Receptor 1 effect on cardiomyocytes
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA932761 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR23372092_1.fastq.gz | Fastqsanger.gz | |||
| SRR23372092_2.fastq.gz | Fastqsanger.gz | |||
| SRR23372093_1.fastq.gz | Fastqsanger.gz | |||
| SRR23372093_2.fastq.gz | Fastqsanger.gz | |||
| SRR23372094_1.fastq.gz | Fastqsanger.gz |
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Project description:Our aim is to explore the effect of Hydroxy-carboxylic Acid Receptor 1 on cardiomyocytes. Neonatal rat cardiomyocytes (NRCMs) were isolated and cultured. Subsequently, NRCMs were treated with the agonist of Hydroxy-carboxylic Acid Receptor 1 (HCAR1), 3Cl-HBA at 40 μM for 48 h(HBA1,HBA2 and HBA3) or DMSO as control(C1,C3 and C3). RNA was extracted using the KAPA RiboErase RNA-Seq kit (Roche, Basel, Switzerland), and was analysed using the Agilent Bioanalyzer 2100 system (Agilent Technologies, CA, USA) for quality control. The libraries were sequenced on an Illumina HiSeq X Ten platform. DESeq2 was used to analyse RNA-seq data. Neonatal rat cardiomyocytes (NRCMs) were isolated and cultured. Subsequently, NRCMs were treated with the agonist of Hydroxy-carboxylic Acid Receptor 1 (HCAR1), 3Cl-HBA (40 μM for 48 h) or DMSO as control. RNA was extracted using the KAPA RiboErase RNA-Seq kit (Roche, Basel, Switzerland), and was analysed using the Agilent Bioanalyzer 2100 system (Agilent Technologies, CA, USA) for quality control. The libraries were sequenced on an Illumina HiSeq X Ten platform.
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Project description:Mechanistic investigations have shown that, upon agonist activation, hydroxy-carboxylic acid receptor-1(HCA1) couples to a Gi protein and inhibits adenylate cyclase activity, leading to inhibition of liberation of free fatty acid. However, the underlying molecular mechanisms for HCA1 signaling remain largely unknown. Using CHO-K1 cells stably expressing HCA1, and L6 cells, which endogenously express rat HCA1 receptors, we found that activation of ERK1/2 by HCA1 was rapid, peaking at 5 min, and was significantly blocked by pertussis toxin. Furthermore, time course experiments with different kinase inhibitors demonstrated that HCA1 induced ERK1/2 activation via the extracellular Ca2+, PKC and IGF-I receptor transactivation-dependent pathways. In addition, we observed that pretreated the cells with M119K, an inhibitor of Gβγ subunit-dependent signaling, effectively attenuated the ERK1/2 activation triggered by HCA1, suggesting a critical role for βγ-subunits in HCA1-activated ERK1/2 phosphorylation. Furthermore, the present results also indicated that the arrestin2/3 were not required for ERK1/2 activation. In conclusion, our findings demonstrate that upon binding to agonist, HCA1 receptors initially activate Gi, leading to dissociation of the Gβγ subunit from activated Gi, and subsequently induce ERK1/2 activation via two distinct pathways: one PKC-dependent pathway and the other IGF-IR transactivation-dependent pathway. Our results provide the first in-depth evidence that defines the molecular mechanism of HCA1-mediated ERK1/2 activation.
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