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Article Dans Une Revue Immunity Année : 2021

Follicular lymphoma triggers phenotypic and functional remodeling of the human lymphoid stromal cell landscape

Sylvain Baulande
Fatima Mechta-Grigoriou
Gilles Salles

Résumé

Lymphoid stromal cells (LSCs) are essential organizers of immune responses. We analyzed tonsillar tissue by combining flow cytometry, in situ imaging, RNA sequencing, and functional assays, defining three distinct human LSC subsets. The integrin CD49a designated perivascular stromal cells exhibiting features of local committed LSC precursors and segregated cytokine and chemokine-producing fibroblastic reticular cells (FRCs) supporting B and T cell survival. The follicular dendritic cell transcriptional profile reflected active responses to B cell and non-B cell stimuli. We therefore examined the effect of B cell stimuli on LSCs in follicular lymphoma (FL). FL B cells interacted primarily with CD49a(+) FRCs. Transcriptional analyses revealed LSC reprogramming in situ downstream of the cytokines tumor necrosis factor (TNF) and transforming growth factor β (TGF-β), including increased expression of the chemokines CCL19 and CCL21. Our findings define human LSC populations in healthy tissue and reveal bidirectional crosstalk between LSCs and malignant B cells that may present a targetable axis in lymphoma.
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Dates et versions

hal-03282989 , version 1 (29-09-2021)

Identifiants

Citer

Frédéric Mourcin, Léa Verdière, David Roulois, Rada Amin, Claire Lamaison, et al.. Follicular lymphoma triggers phenotypic and functional remodeling of the human lymphoid stromal cell landscape. Immunity, 2021, 54 (8), pp.1788-1806.e7. ⟨10.1016/j.immuni.2021.05.019⟩. ⟨hal-03282989⟩
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