Abstract:Objective To explore the effect of the cinobufacini capsule on the serum levels of matrix metalloproteinases (MMP) and autophagy-related proteins in patients with advanced non-small cell lung cancer (NSCLC) undergoing surgery.Methods A total of 108 NSCLC patients visiting our hospital from September 2017 to April 2021 were included in this study and divided into control and study groups according to the randomized number table method. Both groups received radical resection of lung cancer. The control group was given conventional chemotherapy postoperatively, and the study group was additionally given the cinobufacini capsules on the basis of conventional chemotherapy. The clinical efficacy, immune function, serum tumor markers, MMP, and autophagy-related proteins, and adverse reactions were compared between the two groups.Results The objective response rate (ORR) was significantly higher in study group than that in control group (P < 0.05). After the treatment, the decreases in the frequencies of CD3+ and CD4+ lymphocytes and the increase in the frequency of CD8+ lymphocytes in the study group were higher than those in the control group (P < 0.05). The decreases in the levels of carbohydrate antigen 125 (CA125), carcinoembryonic antigen (CEA) and neuron specific enolase (NSE) after the treatment in the study group were greater than those in the control group (P < 0.05). Besides, the decreases in the levels of matrix metalloproteinase-2 (MMP-2) and MMP-9, as well as the increases in the levels of autophagy-related protein 1, microtubule-associated protein 1 light chain 3-Ⅱ (LC3-Ⅱ), were greater in the study group than those in the control group after the treatment (P < 0.05). There was no significant difference in the incidence of thrombocytopenia, liver function damage, leukopenia and nausea and vomiting between the two groups (P > 0.05).Conclusions Cinobufacini capsule is effective as an auxiliary therapy. It improves the immune function and the levels of serum tumor markers, reduces the levels of MMP, and enhances the autophagic activity of cells without increasing the incidence of adverse reactions.