Somatic hypermutation as a generator of antinuclear antibodies in a murine model of systemic autoimmunity.
Somatic hypermutation as a generator of antinuclear antibodies in a murine model of systemic autoimmunity.
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DOI:
10.1084/jem.20092712
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发表时间:
2010-09-27
期刊:
影响因子:
--
通讯作者:
Wysocki LJ
中科院分区:
文献类型:
--
作者:
Guo W;Smith D;Aviszus K;Detanico T;Heiser RA;Wysocki LJ
Systemic lupus erythematosus (SLE) is characterized by high-avidity IgG antinuclear antibodies (ANAs) that are almost certainly products of T cell–dependent immune responses. Whether critical amino acids in the third complementarity-determining region (CDR3) of the ANA originate from V(D)J recombination or somatic hypermutation (SHM) is not known. We studied a mouse model of SLE in which all somatic mutations within ANA V regions, including those in CDR3, could be unequivocally identified. Mutation reversion analyses revealed that ANA arose predominantly from nonautoreactive B cells that diversified immunoglobulin genes via SHM. The resolution afforded by this model allowed us to demonstrate that one ANA clone was generated by SHM after a VH gene replacement event. Mutations producing arginine substitutions were frequent and arose largely (66%) from base changes in just two codons: AGC and AGT. These codons are abundant in the repertoires of mouse and human V genes. Our findings reveal the predominant role of SHM in the development of ANA and underscore the importance of self-tolerance checkpoints at the postmutational stage of B cell differentiation.
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影响因子:
3.6
作者:
Kalsi, JK;Martin, ACR;Isenberg, DA
通讯作者:
Isenberg, DA
影响因子:
32.4
作者:
Hande, S;Notidis, E;Manser, T
通讯作者:
Manser, T
DOI:
10.1016/0090-1229(84)90061-8
发表时间:
1984-01-01
期刊:
CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY
影响因子:
--
作者:
DANG, H;HARBECK, RJ
通讯作者:
HARBECK, RJ
影响因子:
3.6
作者:
Haley, J;Mason, LJ;Rahman, A
通讯作者:
Rahman, A
影响因子:
3.6
作者:
Jang, YJ;Sanford, D;Stollar, BD
通讯作者:
Stollar, BD