RNPC3 and lupus erythematosus: Furthermore, although our review focuses on membrane surface autoantibodies, we call brief attention to evidence of the maternal–fetal transfer of anti-Sjögren's-syndrome-related antigen A (SSA) (Ro) and anti-SSB (La) and anti-ribonucleoprotein 1 (RNP) autoantibodies in mothers with lupus erythematosus (Feki et al. 2015, Zurgil et al. 1993) to better decipher the spectrum of potential maternal–fetal transfer of autoantibodies.