Heparin inhibits inositol trisphosphate-induced calcium release from permeabilized rat liver cells.

Heparin inhibits inositol trisphosphate-induced calcium release from permeabilized rat liver cells.
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肝素抑制肌醇三磷酸诱导的透化大鼠肝细胞钙释放。

DOI:
10.1016/0006-291x(87)90492-x
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发表时间:
1987
影响因子:
3.1
通讯作者:
Boynton,AL
Boynton,AL
中科院分区:
生物学4区
文献类型:
--
作者:
Hill,TD;Berggren,PO;Boynton,AL

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用电穿孔法使261 B细胞具有通透性,0.5 μM的Ins(1,4,5)P3刺激261 B细胞后,261 B细胞内的Ca ~(2+)释放量为0.2-0.3 μM。发现肝素以剂量依赖性方式抑制这种Ca 2+释放反应(Ki为15 μg/ml)。另外两种糖胺聚糖,硫酸软骨素和透明质酸,在高达0.2 mg/ml的剂量下没有显示出抑制作用。被动的Ca 2+释放,和螯合的Ca 2+进入细胞内的存储网站的行动的Ca 2 +-ATP酶肝素治疗的影响。我们的结论是,肝素处理对Ca 2+动员的抑制作用,在透性261 B细胞介导的Ins(1,4,5)P3受体结合位点的相互作用。
Neoplastic rat liver epithelial (261B) cells made permeable by electroporation released 0.2-0.3 μM Ca2+from intracellular stores in response to 0.5 μM Ins(1,4,5)P3stimulation. This Ca2+release response was found to be inhibited by heparin in a dose-dependent manner (Kiof 15 μg/ml). Two other glycosaminoglycans, chondroitin sulfate and hyaluronic acid, showed no inhibitory effect at doses as high as 0.2 mg/ml. Passive Ca2+release, and sequestration of Ca2+into intracellular storage sites by the action of Ca2+-ATPase were unaffected by heparin treatment. We conclude that the inhibitory action of heparin treatment on Ca2+mobilization in permeabilized 261B cells is mediated through its interaction at the Ins(1,4,5)P3receptor binding site.
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发表时间: 1984
影响因子: 4.1
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