JAK2 and lupus nephritis: Another study in vivo revealed that artesunate ameliorated the symptoms of lupus nephritis, decreased renal deposition of anti-dsDNA antibodies and suppressed the production of pathogenic cytokines through a reduction of follicular T helper cells (Tfh) and enhancement of follicular regulatory T cells (Tfr) as well as suppression of Jak2-Stat3 signaling pathway (57).