ArticleBiophysical journal2020
Extraction of Thick Filaments in Individual Sarcomeres Affects Force Production by Single Myofibrils.
Article in Biophysical journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
7 citing papers in PubMed, 9 citations in OpenAlex.
- Post-infarction KLHL40-mediated regulation of cardiac sarcomeric integrity and function.PeerJ · 2026Article
- Impact of stretch on sarcomere length variability in isolated fully relaxed rat cardiac myocytes.Pflugers Archiv : European journal of physiology · 2023Article
- Impact of stretch on sarcomere length variability in isolated fully relaxed rat cardiac myocytes.Research square · 2023Article
- What Can We Learn from Single Sarcomere and Myofibril Preparations?Frontiers in physiology · 2022Review
- Sarcomere Length Nonuniformity and Force Regulation in Myofibrils and Sarcomeres.Biophysical journal · 2020Review
- Force enhancement after stretch of isolated myofibrils is increased by sarcomere length non-uniformities.Scientific reports · 2020Article
- Hypothesis: Single Actomyosin Properties Account for Ensemble Behavior in Active Muscle Shortening and Isometric Contraction.International journal of molecular sciences · 2020Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
It has been accepted that the force produced by a skeletal muscle myofibril depends on its cross-sectional area but not on the number of active sarcomeres because they are arranged in series. However, a previous study performed by our group showed that blocking actomyosin interactions within an activated myofibril and depleting the thick filaments in one sarcomere unexpectedly reduced force production. In this study, we examined in detail how consecutive depletion of thick filaments in individual sarcomeres within a myofibril affects force production. Myofibrils isolated from rabbit psoas were activated and relaxed using a perfusion system. An extra microperfusion needle filled with a high-ionic strength solution was used to erase thick filaments in individual sarcomeres in real time before myofibril activation. The isometric forces were measured upon activation. The force produced by myofibrils with intact sarcomeres was significantly higher than the force produced by myofibrils with one or more sarcomeres lacking thick filaments (p < 0.0001) irrespective of the number of contractions imposed on the myofibrils and their initial sarcomere length. Our results suggest that the myofibril force is affected by intersarcomere dynamics and the number of active sarcomeres in series.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.