TNFSF12 and systemic lupus erythematosus: TNFR superfamily member 12A (TNFRSF12A; encodes Fn14) was slightly upregulated by IFN-α treatment in the SLE KCs only, however, there was no change in TNF superfamily member 12 (TNFSF12; encodes TWEAK) expression in HC or SLE KCs (Supplementary Figure S4A).