Immunoaffinity Purification of HTC Rat Hepatoma Cell Plasminogen Activator-Inhibitor-1
Immunoaffinity Purification of HTC Rat Hepatoma Cell Plasminogen Activator-Inhibitor-1
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HTC 大鼠肝癌细胞纤溶酶原激活剂-抑制剂-1 的免疫亲和纯化
DOI:
10.1055/s-0038-1646047
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发表时间:
1987
影响因子:
6.7
通讯作者:
T. Gelehrter
中科院分区:
文献类型:
--
作者:
R. Zeheb;U. Rafferty;M. Rodríguez;P. Andreasen;T. Gelehrter
Summary Incubation of HTC rat hepatoma cells with the synthetic glucocorticoid dexamethasone rapidly inhibits tissue-type plasminogen activator activity by inducing a specific plasminogen activator-inhibitor (PAI-1). Using immobilized polyclonal antibodies raised against HT-1080 human fibrosarcoma PAI-1, we have purified HTC PAI-1 from serum-free medium conditioned by dexamethasone-treated HTC hepatoma cells and shown it to be antigenically related to human PAI-1. Greater than 100-fold purification with greater than 75% yield was achieved in a single step. The purified PAI-1 migrates on SDS-polyacrylamide gels as a single major band of 49 kDa with a minor band of 46 kDa. Digestion of PAI-1 with endoglycosidase F causes a shift toward faster migrating species which retain inhibitory activity. The purified PAI-1 was stable at pH 2.5, lost 50% of its activity after 15 min at 45° C, and showed marked activation after treatment with SDS or guanidine-HCl. Purified PAI-1 rapidly inhibited and formed complexes with both tissue-type and urokinase-type plasminogen activators. Polyclonal rabbit antirat PAI-1 antibodies were raised which immunoprecipitate both free and complexed PAI-1.
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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
影响因子:
2.9
作者:
Erickson,LA;Lawrence,DA;Loskutoff,DJ
通讯作者:
Loskutoff,DJ
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Cwikel,BJ;Barouski-Miller,PA;Coleman,PL;Gelehrter,TD
通讯作者:
Gelehrter,TD
DOI:
--
发表时间:
1985
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hekman,CM;Loskutoff,DJ
通讯作者:
Loskutoff,DJ
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Coleman,PL;Patel,PD;Cwikel,BJ;Rafferty,UM;Sznycer-Laszuk,R;Gelehrter,TD
通讯作者:
Gelehrter,TD