Abstract:Objective To investigate the clinical efficacy of sintilimab and bevacizumab combined with transcatheter arterial chemoembolization (TACE) in the treatment of advanced liver cancer.Methods From December 2018 to December 2019, a total of 84 patients with advanced liver cancer admitted to Qingyang Hospital of Traditional Chinese Medicine were selected and divided into the study group and the control group by the random number table method, with 42 patients in each group. All patients received TACE treatment. The control group was treated with bevacizumab, while the study group was treated with sintilimab plus bevacizumab. After 3 months of treatment, the clinical efficacy, levels of tumor markers [alpha fetoprotein (AFP), carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA199)] and immune indexes [CD3+ cell, CD4+/CD8+ ratio, natural killer (NK) cell], and adverse drug reactions were compared. The patients were followed up for 3 years, and the progression free survival (PFS) and the overall survival (OS) were recorded.Results The objective remission rate of the study group was 83.33%, which was higher than that of the control group (61.90%) (P < 0.05). The disease control rates of the study group and the control group were 92.86% and 85.71%, respectively. There was no significant difference in the disease control rate between the two groups (P > 0.05). The differences of levels of AFP, CEA, CA199, CD3+ cell, CD4+/CD8+ ratio, and NK cell before and after the treatment in the study group were higher than those in the control group (P < 0.05). There was no significant difference in the incidence of adverse reactions between the two groups (P > 0.05). During the 3-year follow-up, 23 patients died in the study group, with a median PFS of 14 months, a median OS of 23 months and a 3-year overall survival rate of 42.50%. There were 26 cases of death in the control group, with a median PFS of 10 months, a median OS of 20 months and a 3-year overall survival rate of 31.58%. The PFS and OS in the study group were better than those in the control group (P < 0.05).Conclusions Sintilimab and bevacizumab combined with TACE effectively regulates the levels of tumor markers and immune factors in patients with advanced liver cancer, and prolongs the survival of patients with good safety.