GAPDH and systemic lupus erythematosus: SLE: systemic lupus erythematosus, aPL: antiphospholipid, NPSLE: neuropsychiatric systemic lupus erythematosus, CNS: central nervous system, MAP-2: microtubule-associated protein 2, AECA: anti-endothelial-cell antibody, β2-GPI: beta-2-glycoprotein I, anti-RP Ab: anti-ribosomal P protein antibodies, aPL Ab: antiphospholipid antibodies, anti-MAP-2 Ab: anti-microtubule-associated protein 2 antibodies, anti-GAPDH Ab: anti-glyceraldehyde-3-phosphate dehydrogenase antibodies, BBB: blood-brain barrier