Effect of phorbol esters on Ca2+ sensitivity and myosin light-chain phosphorylation in airway smooth muscle.
Effect of phorbol esters on Ca2+ sensitivity and myosin light-chain phosphorylation in airway smooth muscle.
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佛波酯对气道平滑肌 Ca2 敏感性和肌球蛋白轻链磷酸化的影响。
DOI:
10.1152/ajpcell.1998.274.5.c1253
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
Jones,KA
中科院分区:
文献类型:
--
作者:
Bremerich,DH;Kai,T;Warner,DO;Jones,KA
We studied in β-escin-permeabilized canine tracheal smooth muscle (CTSM) the effect of the protein kinase C (PKC) agonist phorbol 12,13-dibutyrate (PDBu) on isometric force at a constant submaximal Ca2+concentration (i.e., the effect on Ca2+sensitivity) and regulatory myosin light-chain (rMLC) phosphorylation. PDBu increased Ca2+sensitivity, an increase associated with a concentration-dependent, sustained increase in rMLC phosphorylation. PDBu altered the relationship between rMLC phosphorylation and isometric force such that the increase in isometric force was less than that expected for the increase in rMLC phosphorylation observed. The effect of four PKC inhibitors [calphostin C, chelerythrine chloride, a pseudosubstrate inhibitor for PKC, PKC peptide-(19—31) (PSSI), and staurosporine] on PDBu-induced Ca2+sensitization as well as the effect of calphostin C and PSSI on rMLC phosphorylation were determined. Whereas none of these compounds prevented or reversed the PDBu-induced increase in Ca2+sensitivity, the PDBu-induced increase in rMLC phosphorylation was inhibited. We conclude that PDBu increases rMLC phosphorylation by activation of PKC but that the associated PDBu-induced increases in Ca2+sensitivity are mediated by mechanisms other than activation of PKC in permeabilized airway smooth muscle.
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DOI:
10.1152/ajpheart.1993.264.4.h1300
发表时间:
1993
期刊:
The American journal of physiology
影响因子:
--
作者:
Y. Shimamoto;H. Shimamoto;C. Kwan;E. Daniel
通讯作者:
E. Daniel
影响因子:
4.1
作者:
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通讯作者:
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DOI:
10.1152/ajplung.1996.271.5.l719
发表时间:
1996
期刊:
The American journal of physiology.
影响因子:
--
作者:
Akao,M;Hirasaki,A;Jones,KA;Wong,GY;Bremerich,DH;Warner,DO
通讯作者:
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DOI:
10.1152/ajpcell.1989.257.6.c1062
发表时间:
1989
期刊:
The American journal of physiology
影响因子:
--
作者:
Gerthoffer,WT;Murphey,KA;Gunst,SJ
通讯作者:
Gunst,SJ
影响因子:
--
作者:
GERTHOFFER, WT
通讯作者:
GERTHOFFER, WT