Nitrotyrosine (NT), a Nitrosative Stress Biomarker, Plasma Concentrations in Gallstone Disease and Cancer Patients.

Background/aim: The aim of this study was to assess the plasma concentration of the nitrosative stress biomarker nitrotyrosine (NT) in gallstone disease and cancer patients.

Materials And Methods: Initially, 114 patients with symptomatic gallstone disease were randomized into the laparoscopic cholecystectomy (LC) (n=54) and the minicholecystectomy (MC) (n=60) groups. The plasma concentrations of NT were measured just before, immediately after (POP1) and 6 h after operation (POP2). The cancer patients of this study included ten patients with gastrointestinal cancer and 19 patients with gynecological cancer.

Results: There was a statistically significant correlation in the median plasma NT concentrations versus plasma catalase (CAT) concentrations in cholecystectomy patients (r=0.169, p=0.001). Interestingly, there was a statistically significant inverse correlation between the individual values of the pain assessed and filed using a 11-point numeric rating scale 8 h postoperatively (NAD) and plasma NT median values in cholecystectomy patients (r=-0.337, p=0.004).

Conclusion: Patients with high plasma concentrations of NT appeared to have significantly lower pain scores 8 h postoperatively.