Regulation of Hormone Secretion by Acute Cell Volume Changes: Ca2+-Independent Hormone Secretion
Regulation of Hormone Secretion by Acute Cell Volume Changes: Ca2+-Independent Hormone Secretion
复制标题
急性细胞体积变化对激素分泌的调节:Ca2 依赖性激素分泌
DOI:
--
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发表时间:
2001
影响因子:
--
通讯作者:
M. Greer
中科院分区:
文献类型:
--
作者:
V. S̆trbák;M. Greer
Exocytosis of intravesicular material should help a cell meet a relative extracellular hyposmotic challenge by expanding the plasmalemma through fusion with vesicular membrane. Cell swelling evokes an immediate secretory burst of hormones stored in secretory vesicles with dynamics indistinguishable from those induced by specific secretagogues. Hormone secretion induced by cell swelling is not associated with a rise in cAMP, IP3, or prostaglandins, and it is not depressed by inhibition of stretch mechano-receptors or aquaporin channels. In contrast to most types of regulated secretion, that induced by cell swelling in normal cells does not require a rise in intracellular Ca2+ through opening L-type Ca2+ channels. However, such Ca2+ influx is essential for cell-swelling induced secretion in tumor-derived pituitary cells. Cell swelling induces universal secretion of exocytotic material. The response of cells specialized in osmoregulation is, however, different. Possible physiological significance: Consistent stimulation of secretion occurs with a 4% hyposmolar challenge. It is likely that fluctuations in osmotic pressure with resultant cell volume changes have a significant regulatory role in hormone secretion. Released hormones could also play an important role in the pathophysiology of ischemia. Exocytosis itself does not have an essential role in volume regulation.
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DOI:
10.1152/ajpendo.1991.260.6.e946
发表时间:
1991
期刊:
The American journal of physiology
影响因子:
--
作者:
Sato,N;Wang,XB;Greer,MA
通讯作者:
Greer,MA
影响因子:
4.8
作者:
Sato,N;Wang,XB;Greer,MA;Greer,SE;McAdams,S;Oshima,T
通讯作者:
Oshima,T
DOI:
10.1113/jphysiol.1991.sp018655
发表时间:
1991
期刊:
The Journal of physiology
影响因子:
--
作者:
Stack,J;Surprenant,A
通讯作者:
Surprenant,A
影响因子:
4
作者:
Wang,X;Inukai,T;Greer,MA
通讯作者:
Greer,MA
DOI:
10.1016/s0021-9258(18)83753-x
发表时间:
1989-03
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
D. Yamaguchi;J. Green;C. Kleeman;S. Muallem
通讯作者:
D. Yamaguchi;J. Green;C. Kleeman;S. Muallem