T Cell Mediated Conversion of a Non-Anti-La Reactive B Cell to an Autoreactive Anti-La B Cell by Somatic Hypermutation.

T Cell Mediated Conversion of a Non-Anti-La Reactive B Cell to an Autoreactive Anti-La B Cell by Somatic Hypermutation.
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DOI:
10.3390/ijms22031198
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发表时间:
2021-01-26
影响因子:
5.6
通讯作者:
Feldmann A
Feldmann A
中科院分区:
生物学2区
文献类型:
--
作者:
Bachmann MP;Bartsch T;Bippes CC;Bachmann D;Puentes-Cala E;Bachmann J;Bartsch H;Arndt C;Koristka S;Loureiro LR;Kegler A;Laube M;Gross JK;Gross T;Kurien BT;Scofield RH;Farris AD;James JA;Schmitz M;Feldmann A

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Since the first description of nuclear autoantigens in the late 1960s and early 1970s, researchers, including ourselves, have found it difficult to establish monoclonal antibodies (mabs) against nuclear antigens, including the La/SS-B (Sjögrens’ syndrome associated antigen B) autoantigen. To date, only a few anti-La mabs have been derived by conventional hybridoma technology; however, those anti-La mabs were not bona fide autoantibodies as they recognize either human La specific, cryptic, or post-translationally modified epitopes which are not accessible on native mouse La protein. Herein, we present a series of novel murine anti-La mabs including truly autoreactive ones. These mabs were elicited from a human La transgenic animal through adoptive transfer of T cells from non-transgenic mice immunized with human La antigen. Detailed epitope and paratope analyses experimentally confirm the hypothesis that somatic hypermutations that occur during T cell dependent maturation can lead to autoreactivity to the nuclear La/SS-B autoantigen.
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