YTHDF2 and systemic lupus erythematosus: Thus, the correlation test was performed to evaluate the correlations between the clinical variables of SLE and the levels of peripheral blood METTL3, WTAP, ALKBH5, FTO, and YTHDF2. Data showed that the mRNA levels of peripheral blood METTL3, WTAP, ALKBH5, FTO, and YTHDF2 in all SLE patients (including all new-onset and revisiting SLE patients) did not correlate with SLEDAI, CRP, ESR, IgG, C3, C4, WBC, RBC, HGB, HCT, PLT, L, M, or N (data not shown).