Oxidative and nitrosative stress — the leading mechanisms of chronic pancreatitis and chronic obstructive pulmonary disease interaction and inducers of their progression

Background. The frequency of chronic pancreatitis (CP) comorbidity with chronic obstructive pulmonary disease (COPD) has significantly increased recently. It may be accompanied by changes in oxidant-antioxidant homeostasis and activates a cascade of reactions of mutual burdening of these pathologies. The purpose of the current research was to evaluate the intensity of lipid peroxidation, oxidative modification of proteins and the state of individual factors of the antioxidant defense system in the development and course of CP, depending on the comorbid COPD. Materials and methods. Three hundred and seventeen patients were examined, including 62 patients with CP alone (group 1), 132 CP patients with comorbid COPD (group 2), 123 patients with COPD alone (group 3). The content in blood of isolated double bonds in compounds, conjugated dienes, ketodienes and conjugated trienes, malonic aldehyde, nitrites/nitrates, reduced glutathione, the activity of catalase, glutathione-S-transferase, glutathione peroxidase were evaluated in all patients. Results. In CP patients with comorbid COPD, the maximum oxidative stress intensity among the compared groups was registered. There was a reliable increase in the content of malonic aldehyde — by 2.0 times (p