Key result
Hypoxic endothelial cells released an unidentified substance that induced rapid, potent, and reversible inhibition of isolated cardiac myocyte contraction and depressed cardiac myosin ATPase activity.
Why the study?
Does acute moderate hypoxia induce endothelial cells to release factors that inhibit myocardial crossbridge cycling?
Does acute moderate hypoxia induce endothelial cells to release factors that inhibit myocardial crossbridge cycling?
Cultured endothelial cells respond to acute moderate hypoxia by releasing an unidentified substance that inhibits myocardial crossbridge cycling independent of Ca2+ signaling, suggesting a mechanism for regulating oxygen supply-demand balance in conditions like myocardial hibernation.
No takes yet. Share an insight, caveat, or question.
Hypoxic endothelial inhibition of myocyte contraction is hypothesis-generating; leaves open in vivo relevance and any therapeutic implications.
Shah et al. (1997) studied Myocardial hypoxia. Acute moderate hypoxia vs. Normoxia was evaluated on Cardiac myocyte contraction and cardiac myosin ATPase activity. Hypoxic endothelial cells released an unidentified substance that induced rapid, potent, and reversible inhibition of isolated cardiac myocyte contraction and depressed cardiac myosin ATPase activity.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: