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H2 and H3 relaxin inhibit high glucose-induced apoptosis in neonatal rat ventricular myocytes
- Source :
- Biochimie. 108:59-67
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- High concentrations of glucose induce cardiomyocyte apoptosis, and contribute to diabetic cardiomyopathy. Relaxin-2 and relaxin-3 are two members of the relaxin peptide family that are cardioprotective. However, it remains unknown whether relaxin-2 or relaxin-3 can regulate apoptosis in high glucose treated-neonatal rat ventricular myocytes (NRVMs). In cultured NRVMs, 33 mmol/l high glucose (HG) increased apoptosis in a time-dependent manner. HG-increased the protein expression of cleaved caspase-8 and -9, two initiators of the extrinsic and intrinsic pathways of apoptosis, Caspase-3 was attenuated by human recombinant relaxin-2 (H2 relaxin) or relaxin-3 (H3 relaxin), indicating that H2 and H3 relaxin inhibited HG-induced apoptosis. Furthermore, endoplasmic reticulum stress (ERS) markers CHOP and caspase-12 were markedly increased in HG-treated NRVMs, leading to apoptosis; this effect was also effectively attenuated by H2 relaxin or H3 relaxin. Treatment of NRVMs with HG reduced autophagy which cannot be adjusted by H2 relaxin or H3 relaxin. In conclusion, HG-induced apoptosis in NRVMs was mediated, in part, by the activation of the extrinsic and intrinsic pathways of apoptosis and ERS, all inhibited by H2 relaxin or H3 relaxin.
- Subjects :
- Male
endocrine system
medicine.medical_specialty
Heart Ventricles
Apoptosis
Peptide
CHOP
Biology
Biochemistry
law.invention
law
Internal medicine
Diabetic cardiomyopathy
Autophagy
medicine
Animals
Myocytes, Cardiac
Rats, Wistar
chemistry.chemical_classification
Relaxin
Dose-Response Relationship, Drug
urogenital system
Endoplasmic reticulum
General Medicine
Endoplasmic Reticulum Stress
medicine.disease
Rats
body regions
Glucose
Endocrinology
Animals, Newborn
chemistry
Recombinant DNA
Female
hormones, hormone substitutes, and hormone antagonists
Signal Transduction
Subjects
Details
- ISSN :
- 03009084
- Volume :
- 108
- Database :
- OpenAIRE
- Journal :
- Biochimie
- Accession number :
- edsair.doi.dedup.....a62b03aeb5a0723d1472a2dcfff2dd74