Shared transcriptional profiles of atypical B cells suggest common drivers of expansion and function in malaria, HIV, and autoimmunity.

Shared transcriptional profiles of atypical B cells suggest common drivers of expansion and function in malaria, HIV, and autoimmunity.
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DOI:
10.1126/sciadv.abg8384
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发表时间:
2021-05
期刊:
影响因子:
13.6
通讯作者:
Madi A
Madi A
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Holla P;Dizon B;Ambegaonkar AA;Rogel N;Goldschmidt E;Boddapati AK;Sohn H;Sturdevant D;Austin JW;Kardava L;Yuesheng L;Liu P;Moir S;Pierce SK;Madi A

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Atypical B cells represent an IFN-γ–driven B cell lineage that may be similarly expanded in malaria, HIV, and autoimmunity. Chronic infectious diseases have a substantial impact on the human B cell compartment including a notable expansion of B cells here termed atypical B cells (ABCs). Using unbiased single-cell RNA sequencing (scRNA-seq), we uncovered and characterized heterogeneities in naïve B cell, classical memory B cells, and ABC subsets. We showed remarkably similar transcriptional profiles for ABC clusters in malaria, HIV, and autoimmune diseases and demonstrated that interferon-γ drove the expansion of ABCs in malaria. These observations suggest that ABCs represent a separate B cell lineage with a common inducer that further diversifies and acquires disease-specific characteristics and functions. In malaria, we identified ABC subsets based on isotype expression that differed in expansion in African children and in B cell receptor repertoire characteristics. Of particular interest, IgD+IgMlo and IgD−IgG+ ABCs acquired a high antigen affinity threshold for activation, suggesting that ABCs may limit autoimmune responses to low-affinity self-antigens in chronic malaria.
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