GLRX and necrotizing enterocolitis: The mucosal barrier was disrupted during NEC stress, as evidenced by secretory immunoglobulin A (SIgA) elevation (Figure 4B), β-defensin-2 suppression (Figure 4C), as well as fluorescein isothiocyanate (FITC)-dextran exudation (Figure 4D); these detrimental effects were mitigated by Grx1−/−.