Effects of probucol on contrast-induced acute kidney injury in patients undergoing percutaneous coronary intervention

Objective: This study was performed to explore the effects of probucol on contrast-induced acute kidney injury (CIAKI) in patients with coronary heart disease undergoing percutaneous coronary intervention (PCI). Methods: In total, 220 patients undergoing PCI were randomly assigned to either the control group (hydration from 12hours before to 12hours after contrast administration; n=110) or the probucol group (hydration plus probucol 500mg twice daily 1 day before and 3 days after the operation; n=110). The primary endpoint was the occurrence of serum creatinine (Scr)-based CIAKI, defined as an absolute increase in Scr by 0.5 mg/dl (44.2 mu mol/L) or a relative 25% increase from baseline within 48 to 72hours after exposure to contrast medium. The secondary outcomes were composite variations in Scr, blood urea nitrogen (BUN), creatinine clearance rate (Ccr) within 48 to 72hours, and major adverse events during hospitalization or the 7-day follow-up period after PCI. Results: The overall incidence of Scr-based CIAKI was 7.3% (16/220): 5.5% (6/110) in the control group and 9.1% (10/110) in the probucol group (chi(2)=1.078, P=.298). There were no significant differences in the occurrence rate of major adverse events during hospitalization or the 7-day follow-up period after PCI between the groups. Multivariate logistic regression analysis showed that probucol was not an independent protective factor for CIAKI (odds ratio, 1.825; 95% confidence interval, 0.639-5.212; P=.261). However, hydration was an independent protective factor (odds ratio, 0.997; 95% confidence interval, 0.995-0.999; P=.004). Conclusion: Probucol cannot effectively reduce the incidence of CIAKI through its anti-inflammatory and antioxidative stress effects.