ArticleThe Journal of general physiology2019
Developmental increase in β-MHC enhances sarcomere length-dependent activation in the myocardium.
Article in The Journal of general physiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Human atrial skinned muscle fibers exhibit reduced length-dependent activation but show faster force development kinetics than ventricular muscle.Journal of molecular and cellular cardiology · 2026Article
- miR-31-5p suppresses myocardial hypertrophy by targeting Nfatc2ip.Journal of cellular and molecular medicine · 2024Article
- Programmed Exercise Attenuates Familial Hypertrophic Cardiomyopathy in Transgenic E22K MiceFrontiers in cardiovascular medicine · 2022Article
- The Beneficial Effects of Chinese Herbal Monomers on Ameliorating Diabetic Cardiomyopathy via Nrf2 Signaling.Oxidative medicine and cellular longevity · 2022Review
- Progress on the regulation of myofibrillar function: Part 2.The Journal of general physiology · 2019Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Shifts in myosin heavy chain (MHC) isoforms in cardiac myocytes have been shown to alter cardiac muscle function not only in healthy developing hearts but also in diseased hearts. In guinea pig hearts, there is a large age-dependent shift in MHC isoforms from 80% α-MHC/20% β-MHC at 3 wk to 14% α-MHC/86% β-MHC at 11 wk. Because kinetic differences in α- and β-MHC cross-bridges (XBs) are known to impart different cooperative effects on thin filaments, we hypothesize here that differences in α- and β-MHC expression in guinea pig cardiac muscle impact sarcomere length (SL)-dependent contractile function. We therefore measure steady state and dynamic contractile parameters in detergent-skinned cardiac muscle preparations isolated from the left ventricles of young (3 wk old) or adult (11 wk old) guinea pigs at two different SLs: short (1.9 µm) and long (2.3 µm). Our data show that SL-dependent effects on contractile parameters are augmented in adult guinea pig cardiac muscle preparations. Notably, the SL-mediated increase in myofilament Ca
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