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b-Adrenergic modulation of the L-type Ca current (ICaL) was characterized for different developmental stages in murine embryonic stem cell-derived cardiomyocytes using the whole-cell patch-clamp technique at 37°C. Cardiomyocytes first appeared in embryonic stem cell-derived embryoid bodies grown for 7 days (7d). ICaL was insensitive to isoproterenol,(More)
Recent experiments have revealed an unanticipated complexity in Ca2+ release processes in smooth muscle. While Ca2+ release via stimulation of phospholipase C activity and the gating of inositol-1,4,5-trisphosphate (InsP3) receptor Ca2+ channels has been well characterized, the role of the homologous family of sarcoplasmic reticulum (SR) Ca2+ channels,(More)
beta1 integrins play a crucial role as cytoskeletal anchorage proteins. In this study, the coupling of the cytoskeleton and intracellular signaling pathways was investigated in beta1 integrin deficient (-/-) embryonic stem cells. Muscarinic inhibition of the L-type Ca2+ current (ICa) and activation of the acetylcholine-activated K+ current (IK,ACh) was(More)
We coexpressed the human large-conductance, calcium-activated K (K(Ca)) channel (alpha- and beta-subunits) and rat atrial natriuretic peptide (ANP) receptor genes in Xenopus oocytes to examine the mechanism of guanylyl cyclase stimulatory coupling to the channel. Exposure of oocytes to ANP stimulated whole cell K(Ca) currents by 21 +/- 3% (at 60 mV),(More)
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