Article ; Online: Measuring the Contractile Kinetics of Isolated Myofibrils from Human-Induced Pluripotent Stem Cell Derived Cardiomyocyte (hiPSC-CM) Models of Cardiomyopathy.
Methods in molecular biology (Clifton, N.J.)
2023 Volume 2735, Page(s) 213–233
Abstract: Isolated myofibrils provide biomechanical data at the contractile organelle level that are independent of cellular calcium handling and signaling pathways. These myofibrils can be harvested from animal tissue, human muscle biopsies, or stem cell-derived ... ...
Abstract | Isolated myofibrils provide biomechanical data at the contractile organelle level that are independent of cellular calcium handling and signaling pathways. These myofibrils can be harvested from animal tissue, human muscle biopsies, or stem cell-derived striated muscle. Here we present our myofibril isolation and rapid solution switching protocols, which allow for precise measurements of activation (kinetics and tension generation) and a biphasic relaxation relationship (initial slow isometric relaxation followed by a fast exponential decay in tension). This experiment is generated on a custom-built myofibril apparatus utilizing a two-photodiode array to detect micron level deflection of our forged glass tip force transducers. A complete activation/relaxation curve can be produced from a single myofibril in under 30 minutes. |
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MeSH term(s) | Animals ; Humans ; Myofibrils/metabolism ; Myocytes, Cardiac/metabolism ; Induced Pluripotent Stem Cells/metabolism ; Myocardial Contraction/physiology ; Cardiomyopathies/metabolism ; Sarcomeres/metabolism ; Kinetics ; Calcium/metabolism |
Chemical Substances | Calcium (SY7Q814VUP) |
Language | English |
Publishing date | 2023-12-01 |
Publishing country | United States |
Document type | Journal Article |
ISSN | 1940-6029 |
ISSN (online) | 1940-6029 |
DOI | 10.1007/978-1-0716-3527-8_12 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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