TLR7 and systemic lupus erythematosus: We demonstrate that activation of naïve B (BN) cells from healthy donors or SLE patients with IFNγ-producing T cells or IFNγ+TLR7/8 and BCR ligands induces formation of a T-bethi pre-ASC population that is phenotypically, transcriptionally and functionally similar to the SLE T-bethi DN2 subset.