Pemphigus Vulgaris Antibody Identifies Pemphaxin
Pemphigus Vulgaris Antibody Identifies Pemphaxin
复制标题
寻常型天疱疮抗体鉴定 Pemphaxin
DOI:
10.1074/jbc.m003174200
复制
发表时间:
2000
期刊:
影响因子:
--
通讯作者:
S. Grando
中科院分区:
文献类型:
--
作者:
V. Nguyen;A. Ndoye;S. Grando
Because pemphigus vulgaris (PV) IgGs adsorbed on the rDsg3-Ig-His baculoprotein induced blisters in neonatal mice, it was proposed that anti-desmoglein 3 (Dsg 3) autoantibody causes PV. However, we found that rDsg3-Ig-His absorbs autoantibodies to different antigens, including a non-Dsg 3 keratinocyte protein of 130 kDa. This prompted our search for novel targets of PV autoimmunity. The PV IgG eluted from a 75-kDa keratinocyte protein band both stained epidermis in a pemphigus-like pattern and induced acantholysis in keratinocyte monolayers. Screening of a keratinocyte λgt11 cDNA library with this antibody identified clones carrying cDNA inserts encoding a novel molecule exhibiting ∼40% similarity with annexin-2, named pemphaxin (PX). Recombinant PX (rPX-His) was produced inEscherichia coli M15 cells, and, because annexins can act as cholinergic receptors, its conformation was tested in a cholinergic radioligand binding assay. rPX-His specifically bound [3H]acetylcholine, suggesting that PX is one of the keratinocyte cholinergic receptors known to be targeted by disease-causing PV antibodies. Preabsorption of PV sera with rPX-His eliminated acantholytic activity, and eluted antibody immunoprecipitated native PX. This antibody alone did not cause skin blisters in vivo, but its addition to the preabsorbed PV IgG fraction restored acantholytic activity, indicating that acantholysis in PV results from synergistic action of antibodies to different keratinocyte self-antigens, including both acetylcholine receptors and desmosomal cadherins.
登录
查看更多内容
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
vanKoppen,CJ;Nathanson,NM
通讯作者:
Nathanson,NM
影响因子:
158.5
作者:
ANHALT, GJ;LABIB, RS;DIAZ, LA
通讯作者:
DIAZ, LA
DOI:
10.1111/1523-1747.ep12371684
发表时间:
1993-11
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
R. Fava;L. Nanney;D. Wilson;L. King
通讯作者:
R. Fava;L. Nanney;D. Wilson;L. King
DOI:
10.1111/1523-1747.ep12471811
发表时间:
1993
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
Thuong-Nguyen,V;Kadunce,DP;Hendrix,JD;Gammon,WR;Zone,JJ
通讯作者:
Zone,JJ
DOI:
10.1111/1523-1747.ep12277087
发表时间:
1989
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
Hashimoto,K;Wun,TC;Baird,J;Lazarus,GS;Jensen,PJ
通讯作者:
Jensen,PJ