Сотрудничество с клетками T-B в эктомных лимфоидных фолликулах распространяет автоиммунитет CNS.
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Kolz Anna, de la Rosa Clara, Syma Isabel J, McGrath Sarah, Kavaka Vladyslav, Schmitz Rosa, Thomann Anna S, Kerschensteiner Martin, Beltran Eduardo, Kawakami Naoto, Peters Anneli
Аннотация
Оригинал публикации
T-B cell cooperation in ectopic lymphoid follicles propagates CNS autoimmunity.
Meningeal ectopic lymphoid follicle (eLF)-like structures have been described in multiple sclerosis, but their role in central nervous system (CNS) autoimmunity is unclear. Here, we used a T helper 17 (TH17) adoptive transfer experimental autoimmune encephalomyelitis model featuring formation of eLFs. Single-cell RNA sequencing revealed that clusters of activated B cells and B1/marginal zone-like B cells were overrepresented in the CNS and identified B cells poised for undergoing germinal center reactions and clonal expansion in the CNS. Using intravital imaging to directly visualize TH17-B cell interactions, we demonstrated that T and B cells form long-lasting antigen-specific contacts in meningeal eLFs that result in reactivation of autoreactive T cells. CNS T cells depended on CNS B cells to maintain a proinflammatory cytokine profile. Our study reveals that extensive T-B cell cooperation occurs in meningeal eLFs, promoting both B cell differentiation and T cell reactivation, and may thereby propagate smoldering inflammation in the CNS.