Anti-β2-glycoprotein I Antibody-mediated Inhibition of Activated Protein C Requires Binding of β2-glycoprotein I to Phospholipids
Anti-β2-glycoprotein I Antibody-mediated Inhibition of Activated Protein C Requires Binding of β2-glycoprotein I to Phospholipids
复制标题
抗 β2-糖蛋白 I 抗体介导的活化蛋白 C 抑制需要 β2-糖蛋白 I 与磷脂结合
DOI:
10.1055/s-0037-1613265
复制
发表时间:
2002
影响因子:
6.7
通讯作者:
T. Ortel
中科院分区:
文献类型:
--
作者:
T. Izumi;Mary L. Pound;Z. Su;G. Iverson;T. Ortel
Summary To clarify the role(s) of anti-β2GPI antibodies on thrombosis in antiphospholipid antibody syndromes (APS), the effect of IgG from three patients on activated protein C (APC) was investigated using phospholipid vesicles and purified proteins. Two of the total IgG inhibited APC activity in the presence of β2GPI, whereas the third IgG did not. In addition, one IgG inhibited APC activity without β2GPI. Anti-β2GPI IgG from the two inhibitory IgG preparations inhibited APC activity only in the presence of β2GPI. Inhibition was suppressed partially by excess APC and almost completely by excess phospholipid vesicles. Cleaved β2GPI, a non-phospholipid-binding form, did not support inhibitory activity, even though the anti-β2GPI IgG bound to the cleaved molecule. This study confirms that anti-β2GPI antibodies from APS patients inhibit APC activity, and demonstrates the requirement of phospholipid binding of β2GPI for expression of the inhibitory activity of these antibodies.
DOI:
10.1016/s0021-9258(17)42183-1
发表时间:
1994-01
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. Smirnov;C. Esmon
通讯作者:
M. Smirnov;C. Esmon
DOI:
10.1021/bi982538b
发表时间:
1999
期刊:
Biochemistry.
影响因子:
--
作者:
Smirnov,MD;Ford,DA;Esmon,CT;Esmon,NL
通讯作者:
Esmon,NL
DOI:
--
发表时间:
2001
期刊:
The Journal of rheumatology.
影响因子:
--
作者:
Hansen,KE;Kong,DF;Moore,KD;Ortel,TL
通讯作者:
Ortel,TL