Thrombin effects on osteoblastic cells. II. Structure-function relationships.

Thrombin effects on osteoblastic cells. II. Structure-function relationships.
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凝血酶对成骨细胞的作用。

DOI:
10.1016/0006-291x(91)90503-y
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发表时间:
1991
影响因子:
3.1
通讯作者:
Fenton2nd,JW
Fenton2nd,JW
中科院分区:
生物学4区
文献类型:
--
作者:
Tatakis,DN;Dolce,C;Dziak,R;Fenton2nd,JW

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凝血酶可引起体外骨吸收,刺激成骨细胞增殖、磷酸肌醇转换和胞浆钙水平。在本研究中,凝血酶的活性位点在其作用于成骨细胞的作用进行了研究。水蛭素或(4-脒基苯基)甲磺酰氟抑制,以剂量依赖性的方式,凝血酶对人成骨细胞样骨肉瘤细胞(G292和Saos-2细胞系)和正常大鼠颅骨成骨细胞的影响。凝血酶诱导的细胞增殖刺激、胞浆钙升高和磷酸肌醇代谢刺激同时受到抑制,且抑制程度相似。抑制剂,当存在于凝血酶的情况下,不影响细胞功能的基础水平。α-凝血酶经蛋白水解裂解后形成的α-凝血酶和γ-凝血酶均能刺激成骨细胞。这些数据表明,凝血酶对成骨细胞样细胞的作用依赖于其催化位点的可用性。
Thrombin has been shown to causein vitrobone resorption and to stimulate osteoblastic cell proliferation, phosphoinositide turnover and cytosolic calcium levels. In the present study, the role of the active site of thrombin in its action on osteoblastic cells was investigated. Either hirudin or (4-amidinophenyl)methanesulfonyl fluoride inhibited, in a dose-dependent manner, the effects of thrombin on human osteoblast-like osteosarcoma cells (G292 and Saos-2 cell lines) and on normal rat calvarial osteoblastic cells. Thrombin-induced stimulation of cell proliferation, cytosolic calcium increases, and stimulation of phosphoinositide metabolism were concomitantly, and to a proportionally similar extent, inhibited. The inhibitors, when present in the absence of thrombin, did not affect the basal levels of cell functions. Both σ-thrombin and γ-thrombin, forms resulting from proteolytic cleavage of α-thrombin, were capable of stimulating the osteoblastic cells. These data indicate that thrombin's actions on osteoblast-like cells are dependent on the availability of its catalytic site.
DOI: 10.1016/s0021-9258(17)40293-6
发表时间: 1977
期刊: The Journal of biological chemistry
影响因子: --
作者:
J. Fenton;M. Fasco;A. B. Stackrow
通讯作者: A. B. Stackrow
DOI: --
发表时间: 1977
影响因子: 4.8
作者:
D. Bing;M. Cory;J. Fenton
通讯作者: J. Fenton
培养的人内皮细胞中凝血酶诱导的前列环素产生与肌醇三磷酸和胞质游离钙水平之间的相关性。
DOI: --
发表时间: 1987
期刊: The Journal of biological chemistry
影响因子: --
作者:
Jaffe,EA;Grulich,J;Weksler,BB;Hampel,G;Watanabe,K
通讯作者: Watanabe,K
凝血酶、胰蛋白酶和离子载体 A 23187 刺激内皮细胞产生前列环素。
DOI: --
发表时间: 1978
影响因子: 15.9
作者:
B. Weksler;C. W. Ley;E. Jaffe
通讯作者: E. Jaffe
凝血酶和胰蛋白酶在同一位点作用,刺激磷酸肌醇水解和钙动员。
DOI: --
发表时间: 1989
影响因子: 3.6
作者:
Jones,LG;McDonough,PM;Brown,JH
通讯作者: Brown,JH