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.
复制标题

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
复制
发表时间:
1987
影响因子:
3.7
通讯作者:
Tullio Pozzan
Tullio Pozzan
中科院分区:
医学3区
文献类型:
--
作者:
Susan Treves;F. Virgilio;Giorgina M. Vaselli;Tullio Pozzan

文献摘要

参考文献

被引文献

相似文献

细胞松弛素通常被用来刺激真核细胞的各种功能,尽管它们的确切作用模式仍有待阐明。在本工作中,我们用荧光指示剂Quin2研究了不同细胞松弛素A、B、C、D、E(CA、CB、CC、CD、CE)和二氢细胞松弛素B(DHCB)对不同类型白细胞内钙离子浓度([Ca+]i)的影响。中性粒细胞和淋巴细胞。在人类中性粒细胞中,细胞松弛素主要通过从膜结合的细胞内储存释放钙离子来增加[钙离子]。因此,为了更容易地了解细胞松弛素对[Ca~(2+)]i的影响,这些细胞必须负载较低的细胞内Qu2浓度。另一方面,在外周血淋巴细胞、脾细胞和胸腺细胞中,[Ca~(2+)]i的升高主要是由于细胞外介质中的Ca~(2+)内流增加。此外,我们还发现,在中性粒细胞中,这些药物延长趋化性多肽引起的[Ca~(2+)]i升高,可能是通过增加细胞对Ca~(2+)的通透性。最后,在胸腺细胞中,细胞松弛素能增强多克隆有丝分裂原刀豆蛋白A(ConA)诱导的肌醇磷酸盐的产生。
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).
甲酰甲硫氨酰-亮氨酰-苯丙氨酸刺激兔中性粒细胞中肌醇三磷酸积累的表征。
DOI: --
发表时间: 1985
影响因子: 3.6
作者:
Bradford,PG;Rubin,RP
通讯作者: Rubin,RP
促分泌素诱导的人白细胞中的磷酸肌醇代谢。
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
DOI: 10.1126/science.6310757
发表时间: 1983-01-01
期刊: SCIENCE
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