Effect of cytochalasins on cytosolic-free calcium concentration and phosphoinositide metabolism in leukocytes.
Effect of cytochalasins on cytosolic-free calcium concentration and phosphoinositide metabolism in leukocytes.
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细胞松弛素对白细胞中游离钙浓度和磷酸肌醇代谢的影响。
DOI:
10.1016/0014-4827(87)90001-2
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发表时间:
1987
影响因子:
3.7
通讯作者:
Tullio Pozzan
中科院分区:
文献类型:
--
作者:
Susan Treves;F. Virgilio;Giorgina M. Vaselli;Tullio Pozzan
Cytochalasins are routinely used to stimulate a variety of functions in eukaryotic cells even though their precise mode of action remains to be elucidated. In the present work we used the fluorescent Ca2+indicator quin2 to study the effect of various cytochalasins, cytochalasins A, B, C, D, E (CA, CB, CC, CD, CE) and dihydrocytochalasin B (dhCB) on the intracellular Ca2+concentration ([Ca2+]i) in various types of leukocytes, viz. neutrophils and lymphocytes. In human neutrophils, cytochalasins increase [Ca2+]imainly by releasing Ca2+from membrane-bound, intracellular stores. Thus, in order to readily appreciate the effect of cytochalasins on [Ca2+]i, these cells must be loaded with low intracellular quin2 concentrations. On the other hand, in peripheral blood lymphocytes, splenocytes and thymocytes, the increase in [Ca2+]iis predominantly due to an increased Ca2+influx from the extracellular medium. In addition, we found that in neutrophils these drugs prolong the increase in [Ca2+]iinduced by chemotactic peptides, probably by increasing the cell permeability to Ca2+. Finally, in thymocytes, cytochalasins potentiate the production of inositol phosphates induced by the polyclonal mitogen concanavalin A (conA).
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影响因子:
3.6
作者:
Bradford,PG;Rubin,RP
通讯作者:
Rubin,RP
DOI:
10.1042/bj2220307
发表时间:
1984
期刊:
The Biochemical journal
影响因子:
--
作者:
Dougherty,RW;Godfrey,PP;Hoyle,PC;PutneyJr,JW;Freer,RJ
通讯作者:
Freer,RJ
影响因子:
56.9
作者:
POZZAN, T;LEW, DP;TSIEN, RY
通讯作者:
TSIEN, RY
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Korchak,HM;Vienne,K;Rutherford,LE;Wilkenfeld,C;Finkelstein,MC;Weissmann,G
通讯作者:
Weissmann,G