PTPRC and systemic lupus erythematosus: Flow cytometry staining of bone marrow cells showed that compared to pristane alone, tRA supplementation either pre- or post-induction of lupus significantly induced the expansion of CD11b+ (Figure 2A) and CD11b− (Figure 2B) subsets of conventional dendritic cells (cDCs) gated as B220− Siglec-H− in CD11c+ myeloid cells.