Article
Ca(2+) activation of myofilaments from transgenic mouse hearts expressing R92Q mutant cardiac troponin T.
American journal of physiology. Heart and circulatory physiology - 1 Feb 2001
Chandra M, Rundell V L, Tardiff J C, Leinwand L A, De Tombe P P, Solaro R J
Abstract excerpt
The functional consequences of the R92Q mutation in cardiac troponin T (cTnT), linked to familial hypertrophic cardiomyopathy in humans, are not well understood. We have studied steady- and pre-steady-state mechanical activity of detergent-skinned fiber bundles from a transgenic (TG) mouse model in which 67% of the total cTnT in the heart was replaced by the R92Q mutant cTnT. TG fibers were more sensitive to...
Topics
- Acidosis
- Actin Cytoskeleton
- Adenosine Triphosphate
- Animals
- Calcium
- Cross-Linking Reagents
- Detergents
- Genes, myc
- Humans
- Mice
- Mice, Transgenic
- Muscle Contraction
- Muscle Fibers, Skeletal
- Mutation
- Promoter Regions, Genetic
