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Updated: Jul 14, 2026
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Simultaneous Assessment of Cardiomyocyte DNA Synthesis and Ploidy: A Method to Assist Quantification of Cardiomyocyte Regeneration and Turnover
Published on: May 23, 2016
[Relationship between cardiomyocyte protein synthesis and cell viability]
Xiao-xing Zhu1, Xiao-lin Niu, Jin Wei
1Department of Cardiology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China. xx_zhu2003@yahoo.com.cn
Summary
Protein synthesis does not impact cardiomyocyte viability in neonatal rats. Endothelin-1 (ET-1) increased protein synthesis but decreased cell viability, suggesting no direct association.
Area of Science:
- Cardiology
- Molecular Biology
- Cell Biology
Context:
- Neonatal rat cardiomyocytes are a model for studying cardiac function.
- Endothelin-1 (ET-1) is a potent vasoconstrictor that can affect cardiac cells.
- Protein synthesis and cell viability are critical determinants of cardiac health.
Purpose:
- To investigate the relationship between protein synthesis and cardiomyocyte viability in neonatal rats.
- To determine if ET-1 influences both protein synthesis and cell viability.
- To assess the effects of lacidipine and tetramethylpyrazine on ET-1-induced changes.
Summary:
- Protein synthesis in neonatal rat cardiomyocytes was measured using Brandford's method.
- Cell viability was assessed via MTT assay, measuring absorbance at 490 nm (A(490 nm)) relative to total cell number.
- ET-1 increased protein synthesis dose-dependently, but higher doses reduced cell viability, an effect exacerbated by lacidipine and tetramethylpyrazine.
Impact:
- This study indicates that increased protein synthesis does not correlate with enhanced cardiomyocyte viability in this model.
- Findings suggest a dissociation between protein synthesis and cell survival under certain conditions.
- The results may inform therapeutic strategies targeting cardiac protection by clarifying the roles of protein synthesis and cell viability.
