Pathogenic accumulation of T follicular helper cells in lupus disease depends on PD-L1 and IL-4 expressing basophils

ABSTRACT Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by autoantibodies raised against nuclear antigens and whose production is promoted by autoreactive T follicular helper (TFH) cells. Basophils, by accumulating in secondary lymphoid organs (SLO), amplify autoantibody production and disease progression through mechanisms to be defined. Here, we demonstrate that a functional relationship between TFH cells and basophils occurs in SLO during lupus pathogenesis. On SLE patient blood basophils, PD-L1 expression was upregulated and associated with TFH and TFH2 cell expansions and with disease activity. In two distinct lupus-like mouse models, TFH cell pathogenic accumulation, maintenance and function, and disease activity were dependent on basophils and their expressions of PD-L1 and IL-4. Our study establishes a direct link between basophils and TFH cells in the SLE context that promotes autoreactive IgG production and lupus nephritis pathogenesis. Altering the basophil/TFH cell axis in the SLE context may represent a promising innovative intervention strategy in SLE..

Medienart:

Preprint

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

bioRxiv.org - (2023) vom: 04. Dez. Zur Gesamtaufnahme - year:2023

Sprache:

Englisch

Beteiligte Personen:

Tchen, John [VerfasserIn]
Simon, Quentin [VerfasserIn]
Chapart, Léa [VerfasserIn]
Lamri, Yasmine [VerfasserIn]
Saidoune, Fanny [VerfasserIn]
Pacreau, Emeline [VerfasserIn]
Pellefigues, Christophe [VerfasserIn]
Bex-Coudrat, Julie [VerfasserIn]
Karasuyama, Hajime [VerfasserIn]
Miyake, Kensuke [VerfasserIn]
Hidalgo, Juan [VerfasserIn]
Fallon, Padraic G. [VerfasserIn]
Papo, Thomas [VerfasserIn]
Blank, Ulrich [VerfasserIn]
Benhamou, Marc [VerfasserIn]
Hanouna, Guillaume [VerfasserIn]
Sacre, Karim [VerfasserIn]
Daugas, Eric [VerfasserIn]
Charles, Nicolas [VerfasserIn]

Links:

Volltext [kostenfrei]

Themen:

570
Biology

doi:

10.1101/2023.01.10.23284399

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

XBI038392151