Peer-reviewedCC BY 4.0Frontiers in Immunology19 Oct 2026

Antigen specificity and inflammatory amplification in autoimmune hepatitis

Zihao Xu¹
Yifan Liu¹
Haoyang Zou¹
Sheng Guo^2,3,4,5

5 affiliations

¹School of Chinese Medicine, Hubei University of Chinese Medicine
²Institute of Liver Diseases, Hubei Key Laboratory of Theoretical and Applied Research of Liver and Kidney in Traditional Chinese Medicine, Hubei Provincial Hospital of Traditional Chinese Medicine
³Hubei Provincial Clinical Research Center of Traditional Chinese Medicine for Liver Diseases
⁴Hubei Shizhen Laboratory
⁵Affiliated Hospital of Hubei University of Chinese Medicine

Abstract

Human leukocyte antigen (HLA) associations anchor genetic susceptibility to autoimmune hepatitis (AIH). Connecting this susceptibility to the immune reactions that sustain liver injury remains a central challenge. Recent antigen-specific experiments and tissue analyses provide complementary insights into recognition and injury. This Mini Review examines how population-specific HLA associations, SepSecS-reactive lymphocytes and intrahepatic immune states inform the relationship between antigen recognition and inflammatory amplification. The evidence reveals three unresolved relationships between susceptibility, recognition and injury. Class II-restricted autoreactivity and conditionally independent class I associations in Han Chinese AIH implicate potentially complementary immune pathways. Antigen-specific T-cell responses extend beyond the boundaries defined by autoantibody status. Receptor specificity and the capacity to sustain tissue injury require distinct functional tests. We evaluate antigen-presentation experiments, receptor studies and tissue profiling, distinguishing human observations from mechanistic models. The synthesis supports a model in which heterogeneous antigen-specific responses may converge on shared inflammatory processes. Priorities include linking genetic risk to natural antigen presentation and defining autoreactive clone function in liver tissue. Matched perturbation experiments should then test antigen dependence alongside cytokine-dependent injury. Resolving these questions would clarify which mechanisms require antigen-specific intervention and which reflect downstream inflammatory amplification.

Veillonella dispar triggers dual-hits in the pathogenesis of autoimmune hepatitis and primary biliary cholangitis via testosterone depletion-BAFF-B cell axis and Th17 cell activation
Y.-L. Liu, Q.-Q. Xing, X. Lin +9
bioRxiv26 Sep 2026PreprintAll rights reservedFull textImmunologybioRxiv
General prediction of T cell receptor antigen specificity from sequence using AlphaFold 3
Lawson J. Woods, Brandon Neff, Kamel Lahouel +5
Science Advances30 Oct 2026Peer-reviewedCC BY-NCFull textImmunologySci. Adv.CrossrefEurope PMCEurope PMC+1
TCR origin and specificity to environmental or self-antigens on distinct antigen-presenting cells determine peripheral Treg cell differentiation
Xinxin Chi, Charlotte H. Wang, Yollanda Franco Parisotto +10
Immunity28 Jul 2026Peer-reviewedCC BY-NC-ND6 citedImmunologyOpenAlex
Beyond Better Models: Barriers and a Path Forward in Generalisable TCR Antigen Specificity Prediction
H. Koohy, I. Ilievski, A. Antanaviciute +1
bioRxiv12 Oct 2026PreprintCC BY-NC-NDFull textImmunologybioRxiv
Case Report: Acute liver failure in systemic lupus erythematosus with autoimmune hepatitis–primary biliary cholangitis overlap: a belimumab-containing regimen and longitudinal follow-up
Lina Zhang, Tong Zhang, Jing Zhang +3
Frontiers in Immunology6 Oct 2026Peer-reviewedCC BY 4.0Full textImmunologyCrossrefEurope PMC

Cite

BibTeX RIS

BibTeX

@article{xu2026antigen,
  title = {{Antigen specificity and inflammatory amplification in autoimmune hepatitis}},
  author = {Zihao Xu and Yifan Liu and Haoyang Zou and Sheng Guo},
  journal = {Frontiers in Immunology},
  year = {2026},
  month = oct,
  doi = {10.3389/fimmu.2026.1996626},
  url = {https://www.frontiersin.org/articles/10.3389/fimmu.2026.1996626/full},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Antigen specificity and inflammatory amplification in autoimmune hepatitis
AU  - Zihao Xu
AU  - Yifan Liu
AU  - Haoyang Zou
AU  - Sheng Guo
PY  - 2026
DA  - 2026/10/19
JO  - Frontiers in Immunology
DO  - 10.3389/fimmu.2026.1996626
UR  - https://www.frontiersin.org/articles/10.3389/fimmu.2026.1996626/full
AB  - Human leukocyte antigen (HLA) associations anchor genetic susceptibility to autoimmune hepatitis (AIH). Connecting this susceptibility to the immune reactions that sustain liver injury remains a central challenge. Recent antigen-specific experiments and tissue analyses provide complementary insights into recognition and injury. This Mini Review examines how population-specific HLA associations, SepSecS-reactive lymphocytes and intrahepatic immune states inform the relationship between antigen recognition and inflammatory amplification. The evidence reveals three unresolved relationships between susceptibility, recognition and injury. Class II-restricted autoreactivity and conditionally independent class I associations in Han Chinese AIH implicate potentially complementary immune pathways. Antigen-specific T-cell responses extend beyond the boundaries defined by autoantibody status. Receptor specificity and the capacity to sustain tissue injury require distinct functional tests. We evaluate antigen-presentation experiments, receptor studies and tissue profiling, distinguishing human observations from mechanistic models. The synthesis supports a model in which heterogeneous antigen-specific responses may converge on shared inflammatory processes. Priorities include linking genetic risk to natural antigen presentation and defining autoreactive clone function in liver tissue. Matched perturbation experiments should then test antigen dependence alongside cytokine-dependent injury. Resolving these questions would clarify which mechanisms require antigen-specific intervention and which reflect downstream inflammatory amplification.
SN  - 1664-3224
ER  -

Abstract

Related

Cite