Modulation of vasopressin-sensitive cyclic AMP levels by calcium in papillary collecting tubules.
Modulation of vasopressin-sensitive cyclic AMP levels by calcium in papillary collecting tubules.
复制标题
乳头集合管中钙对加压素敏感的环 AMP 水平的调节。
DOI:
10.1016/0303-7207(88)90075-5
复制
发表时间:
1988
影响因子:
4.1
通讯作者:
Jackson,BA
中科院分区:
文献类型:
--
作者:
Jackson,BA
The present study was designed to examine the extent to which calcium modulates vasopressin (AVP)-stimulated cyclic AMP (cAMP) accumulation in microdissected rat papillary collecting ducts (PCD), and to identify the mechanism(s) involved. Using a submaximal concentration of vasopressin (1 nM), ionophore A23187-mediated increases in intracellular calcium inhibited AVP-dependent cAMP levels by 69% (P< 0.001) in the absence of the cAMP-phosphodiesterase inhibitor 1-methyl-3-isobutyl xanthine (MIX). The degree of inhibition was significantly reduced (−47%;P< 0.01) in the presence of MIX. Compared to controls (1.2 mM calcium), AVP-sensitive cAMP accumulation was significantly reduced ( − 34%;P< 0.05) when PCD were incubated in a medium containing an increased (5.0 mM) calcium concentration. In the presence of MIX 5.0 mM calcium had no effect on cAMP levels. Conversely, compared to controls, a calcium-free medium increased AVP-dependent cAMP accumulation by 89% (P< 0.01) in the absence of MIX, and similarly by 82% (P< 0.05) in the presence of MIX. These data demonstrate that calcium can modulate AVP-dependent cAMP accumulation in PCD as a result of effects on both adenylate cyclase and cAMP phosphodiesterase activities.
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DOI:
10.7883/yoken1952.25.321
发表时间:
1972
期刊:
Japanese journal of medical science & biology
影响因子:
--
作者:
Yutaka Doi;T. Sanpe;Minoru Nakajima;Shoichiro Okawa;Toshitada Katoh;Heihachi Itoh;Takeshi Sato;Kimio Oguchi;Toshiro Kumanishi;Tadao Tsubaki
通讯作者:
Tadao Tsubaki
影响因子:
3.7
作者:
Carrigan,DR
通讯作者:
Carrigan,DR
影响因子:
4.4
作者:
R. Fujinami;M. Oldstone
通讯作者:
M. Oldstone
影响因子:
15.3
作者:
B. Joseph;M. Oldstone
通讯作者:
M. Oldstone
影响因子:
3.6
作者:
I. Fish;M. Winick
通讯作者:
M. Winick