Why the study?
Does cGMP-dependent protein kinase decrease calcium sensitivity in skinned cardiac muscle fibers?
Population
Chemically skinned (Lubrol WX) cardiac muscle fibers
Comparison
Addition of cGMP and cGMP-dependent protein kinase vs Baseline state (in presence of MgATP 10 mM)
Design
Preclinical
Authors
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Animal data link cGMP-PK to reduced myofilament Ca sensitivity; hypothesis-generating for human HF signaling before clinical translation.
Does cGMP-dependent protein kinase decrease calcium sensitivity in skinned cardiac muscle fibers?
cGMP-dependent protein kinase decreases calcium sensitivity in cardiac muscle fibers, associated with phosphorylation of troponin-I and another protein, similar to the effects of cAMP-dependent protein kinase.
Pfitzer et al. (1982) studied this question.
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