TCR-like antibodies distinguish conformational and functional differences in two- versus four-domain auto reactive MHC class II-peptide complexes.
TCR-like antibodies distinguish conformational and functional differences in two- versus four-domain auto reactive MHC class II-peptide complexes.
复制标题
DOI:
10.1002/eji.201041241
复制
发表时间:
2011-05
影响因子:
5.4
通讯作者:
Reiter, Yoram
中科院分区:
文献类型:
--
作者:
Dahan, Rony;Tabul, Moran;Chou, Yuan K.;Meza-Romero, Roberto;Andrew, Shayne;Ferro, Adolph J.;Burrows, Gregory G.;Offner, Halina;Vandenbark, Arthur A.;Reiter, Yoram
Antigen presenting cell-associated four-domain MHC class-II molecules play a central role in activating autoreactive CD4+ T-cells involved in Multiple Sclerosis (MS) and Type 1 Diabetes (T1D). In contrast, two-domain MHC-II structures with the same covalently-attached self peptide (Recombinant T-cell receptor Ligands=RTLs) can regulate pathogenic CD4+ T-cells and reverse clinical signs of experimental autoimmune diseases. RTL1000, comprised of the β1α1 domains of HLA-DR2 linked to the encephalitogenic human MOG-35-55 peptide, was recently shown to be safe and well-tolerated in a Phase I clinical trial in MS. To evaluate the opposing biological effects of four- vs. two-domain class-II structures, we screened phage Fab antibodies (Abs) for neutralizing activity of RTL1000. . Five different TCR-like Abs were identified that could distinguish between the two- vs. four-domain MHC peptide complexes, while the cognate TCR was unable to make such a distinction. Moreover, Fab detection of native two-domain HLA-DR structures in human plasma implies that there are naturally-occurring regulatory MHC-peptide complexes. These results demonstrate for the first time distinct conformational determinants characteristic of activating vs. tolerogenic MHC-peptide complexes involved in human autoimmunity.
登录
查看更多内容
DOI:
10.1073/pnas.98.4.1763
发表时间:
2001-02-13
影响因子:
11.1
作者:
Nepom, GT;Lippolis, JD;Nepom, BS
通讯作者:
Nepom, BS
影响因子:
4.8
作者:
de Haard, HJ;van Neer, N;Hoogenboom, HR
通讯作者:
Hoogenboom, HR
影响因子:
4.4
作者:
Adamus, G;Burrows, GG;Offner, H
通讯作者:
Offner, H
影响因子:
82.9
作者:
Korn, Thomas;Reddy, Jayagopala;Kuchroo, Vijay K.
通讯作者:
Kuchroo, Vijay K.
影响因子:
4.4
作者:
Cohen, CJ;Sarig, O;Reiter, Y
通讯作者:
Reiter, Y