AUTHOR=Zhang Jinmeng , Xu Dayu , Zhou Yue , Zhu Zhengfei , Yang Xi TITLE=Mechanisms and Implications of CDK4/6 Inhibitors for the Treatment of NSCLC JOURNAL=Frontiers in Oncology VOLUME=Volume 11 - 2021 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.676041 DOI=10.3389/fonc.2021.676041 ISSN=2234-943X ABSTRACT=Cyclin-dependent kinases (CDKs) are critical regulators of cell cycle progression in malignant cells, functioning through complex molecular interactions. Deregulation of CDK dependent pathways is commonly found in non-small cell lung cancer, and these derangements suggest vulnerabilities that can be exploited for clinical benefit. CDK4/6 inhibitors can prevent tumor cells from entering the G approved 1 and S phases, which can be used in hormone receptor positive breast cancer, and combined with endocrine therapy, has become the first-line standard treatment for patients with breast cancer. CDK4/6 inhibitors have been studied in a series of explorations and demonstrated to have brought great clinical benefits to patients and gave more encouragement to physicians and researchers, thereby showing potential as a new therapeutic agent. A series of preclinical and clinical studies have been carried out on CDK4/6 inhibitors in NSCLC, and have been achieved some results, which may become a new treatment in the future. This review focuses on research progress on CDK4/6 inhibitors in NSCLC, particularly the mechanisms of action, drugs, clinical research progress, and future application.