IPMK and arthritic joint disease: To investigate the role of myeloid IPMK in inflammatory arthritis, we induced K/BxN serum-transfer arthritis in wild-type (IpmkWT) or myeloid cell-specific IPMK KO mice (LysM-Cre+Ipmkfl/fl designated as IpmkΔLysM) by injecting serum from K/BxN mice.