AXL and systemic lupus erythematosus: In the case of AXL, the observed increase in sAxl could be attributed to carriers of the G allele (24.6 ± 5.2 ng/mL in 17 GG ± AG controls compared to 41.2 ± 3.8 ng/mL in 19 AG SLE patients), while no differences were observed in the AA genotype between SLE and controls.