CD4+ T cells in the lungs of acute sarcoidosis patients recognize an Aspergillus nidulans epitope.

CD4+ T cells in the lungs of acute sarcoidosis patients recognize an Aspergillus nidulans epitope.
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DOI:
10.1084/jem.20210785
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发表时间:
2021-10-04
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Fontenot AP
Fontenot AP
中科院分区:
其他
文献类型:
--
作者:
Greaves SA;Ravindran A;Santos RG;Chen L;Falta MT;Wang Y;Mitchell AM;Atif SM;Mack DG;Tinega AN;Maier LA;Dai S;Pinilla C;Grunewald J;Fontenot AP

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We identify a peptide derived from Aspergillus nidulans recognized by CD4+ T cells derived from the lungs of Löfgren’s syndrome (LS) patients and provide evidence that A. nidulans plays a role in the pathogenesis of LS. Löfgren’s syndrome (LS) is an acute form of sarcoidosis characterized by a genetic association with HLA-DRB1*03 (HLA-DR3) and an accumulation of CD4+ T cells of unknown specificity in the bronchoalveolar lavage (BAL). Here, we screened related LS-specific TCRs for antigen specificity and identified a peptide derived from NAD-dependent histone deacetylase hst4 (NDPD) of Aspergillus nidulans that stimulated these CD4+ T cells in an HLA-DR3–restricted manner. Using ELISPOT analysis, a greater number of IFN-γ– and IL-2–secreting T cells in the BAL of DR3+ LS subjects compared with DR3+ control subjects was observed in response to the NDPD peptide. Finally, increased IgG antibody responses to A. nidulans NDPD were detected in the serum of DR3+ LS subjects. Thus, our findings identify a ligand for CD4+ T cells derived from the lungs of LS patients and suggest a role of A. nidulans in the etiology of LS.
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