SERPINC1 and systemic lupus erythematosus: Of the 23 proteins which increased more in the iLN group than the SLE group, 19 proteins, including ORM1 and SERPINC1, were show by protein interaction network analysis to be related to the acute phase response (FDR 8E-06), cellular oxidant detoxification (FDR 8E-03) or response to stress (FDR 4E-02).