The CDK4/6 inhibitor in HR-positive advanced breast cancer: A systematic review and meta-analysis
2018
Background: Recently, several high-quality clinical randomized controlled trials (RCTs) have identified that cyclin-dependent kinases (CDKs) 4/6 inhibitors obtained a great safety and efficacy, which can be consequently applied as a combination therapy with letrozole or fulvestrant for women who had advanced breast cancer and progressed while receiving endocrine therapy. In this systemic review, we performed a meta-analysis to explore whether CDK4/6 inhibitors had a significantly benefit to treating hormone receptor-positive (HR-positive)/human epidermal growth factor receptor 2 negative (HER2-negative) advanced breast cancer. Methods: The data for meta-analysis were collected from MEDLINE, EMBASE, and Cochrane Library from January 1980 to December 2017, and eventually 3182 patients from 6 RCTs were included. Results: The result showed the CDK4/6 inhibitor group had a longer progression-free survival (PFS) (hazard ratio = 0.51; 95% confidence interval [CI], 0.46–0.57, P Conclusion: CDK4/6 inhibitors can significantly prolong the PFS and improve the objective response and clinical benefit response among the patients with HR-positive/ HER2-negative advanced breast cancer.
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