- Autoantibodies that stabilize U1snRNP are a significant component of human autoantibodies to snRNP and delay proteolysis of sm antigens in vitro. Satoh, M., Akaogi, J., Kuroda, Y., Nacionales, D.C., Yoshida, H., Yamasaki, Y., Reeves, W.H. J. Rheumatol. (2004)