Binding of tissue plasminogen activator to cultured human endothelial cells.
Binding of tissue plasminogen activator to cultured human endothelial cells.
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组织纤溶酶原激活剂与培养的人内皮细胞的结合。
DOI:
10.1172/jci113262
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发表时间:
1987
期刊:
影响因子:
--
通讯作者:
Nachman,RL
中科院分区:
文献类型:
--
作者:
Hajjar,KA;Hamel,NM;Harpel,PC;Nachman,RL
Tissue plasminogen activator (t-PA) and urokinase (u-PA), the major activators of plasminogen, are synthesized and released from endothelial cells. We previously demonstrated specific and functional binding of plasminogen to cultured human umbilical vein endothelial cells (HUVEC). In the present study we found that t-PA could bind to HUVEC. Binding of t-PA to HUVEC was specific, saturable, plasminogen-independent, and did not require lysine binding sites. The t-PA bound in a rapid and reversible manner, involving binding sites of both high (Kd, 28.7 +/- 10.8 pM; Bmax, 3,700 +/- 300) and low (Kd, 18.1 +/- 3.8 nM; Bmax 815,000 +/- 146,000) affinity. t-PA binding was 70% inhibited by a 100-fold molar excess of u-PA. When t-PA was bound to HUVEC, its apparent catalytic efficiency increased by three- or fourfold as measured by plasminogen activation. HUVEC-bound t-PA was active site-protected from its rapidly acting inhibitor: plasminogen activator inhibitor. These results demonstrate that t-PA specifically binds to HUVEC and that such binding preserves catalytic efficiency with respect to plasminogen activation. Therefore, endothelial cells can modulate hemostatic and thrombotic events at the cell surface by providing specific binding sites for activation of plasminogen.
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影响因子:
2.9
作者:
B. M. Martin;W. W. Wasiewski;J. Fenton;T. Detwiler
通讯作者:
T. Detwiler
DOI:
10.1016/s0021-9258(17)42691-3
发表时间:
1984-12
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. V. van Mourik;D. Lawrence;D. Loskutoff
通讯作者:
J. V. van Mourik;D. Lawrence;D. Loskutoff
DOI:
--
发表时间:
1976
期刊:
Hoppe-Seyler´s Zeitschrift für physiologische Chemie
影响因子:
--
作者:
C. Brown;E. Hartree
通讯作者:
E. Hartree
影响因子:
3.4
作者:
Shuman,MA;Merkel3rd,CH
通讯作者:
Merkel3rd,CH
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hajjar,KA;Harpel,PC;Jaffe,EA;Nachman,RL
通讯作者:
Nachman,RL