Evaluation of HER-2 positive breast cancer treated with dual-targeted treatment of Trastuzumab plus Pertuzumab

Objective: Clinical studies have shown that trastuzumab combined with pertuzumab (dual-targeted drug therapy) can significantly improve the treatment status and prognosis of HER-2 positive breast cancer patients through double targeting of HER-2. This study systematically evaluated the efficacy and safety of trastuzumab combined with pertuzumab in the treatment of HER-2 positive breast cancer.Method: We search relevant databases and collect RCTs on the treatment of HER-2 positive breast cancer with dual-targeted treatment. Meta-analysis was performed using Revman5.4 software.Results: A total of 10 studies for 8553 patients were included. Meta-analysis showed that, in terms of efficacy, overall survival (OS) (HR = 1.40, 95%CI = 1.29-1.53, p < 0.00001) and progression-free survival (PFS) (HR = 1.36, 95%CI = 1.28-1.46, p < 0.00001) in dual-targeted drug therapy were better than which in the single-targeted drug group. In terms of safety, the highest incidence (Relative risk, RR) of Adverse reactions was Infections and infestations (RR = 1.48, 95%CI = 1.24-1.77, p < 0.0001) follow by Nervous system disorders (RR = 1.29, 95%CI = 1.12-1.50, p = 0.0006), Gastrointestinal disorders (RR = 1.25, 95%CI = 1.18-1.32, p < 0.0001), Respiratory, thoracic, and mediastinal disorders (RR = 1.21, 95%CI = 1.01-1.46, p = 0.04), Skin and subcutaneous tissue disorders (RR = 1.14, 95%CI = 1.06-1.22, p = 0.0002) and General disorders (RR = 1.14, 95%CI = 1.04-1.25, p = 0.004) in dual-targeted drug therapy group. The incidence of Blood system disorder (RR = 0.94, 95%CI = 0.84-1.06, p = 0.32) and Liver dysfunction (RR = 0.80, 95%CI = 0.66-0.98, p = 0.03) was lower than that of the single targeted drug group.Conclusion: Dual-targeted treatment for HER-2-positive breast cancer can prolong the OS, PFS and improve the quality of patients' life. Meanwhile, it also brings a higher medication risk, which requires a rational selection of drug symptomatic interventions.