CDK4/6 Inhibitors Impede Chemoresistance and Inhibit Tumor Growth of Small Cell Lung Cancer

Autor: Yang Wen, Xue Sun, Lingge Zeng, Shumei Liang, Deyu Li, Xiangtian Chen, Fanrui Zeng, Chao Zhang, Qiongyao Wang, Qinsong Zhong, Ling Deng, Linlang Guo
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Advanced Science, Vol 11, Iss 38, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 2198-3844
20240066
DOI: 10.1002/advs.202400666
Popis: Abstract Small cell lung cancer (SCLC) is characterized by rapid development of chemoresistance and poor outcomes. Cyclin‐dependent kinase 4/6 inhibitors (CDK4/6is) are widely used in breast cancer and other cancer types. However, the molecular mechanisms of CDK4/6 in SCLC chemoresistance remain poorly understood. Here, Rb1flox/flox, Trp53flox/flox, Ptenflox/flox (RTP) and Rb1flox/flox, Trp53flox/flox, MycLSL/LSL (RPM) spontaneous SCLC mouse models, SCLC cell line‐derived xenograft (CDX) models, and SCLC patient‐derived xenograft (PDX) models are established to reveal the potential effects of CDK4/6is on SCLC chemoresistance. In this study, it is found that CDK4/6is palbociclib (PD) or ribociclib (LEE) combined with chemotherapeutic drugs significantly inhibit SCLC tumor growth. Mechanistically, CDK4/6is do not function through the classic Retionblastoma1 (RB) dependent axis in SCLC. CDK4/6is induce impair autophagy through the AMBRA1‐lysosome signaling pathway. The upregulated AMBRA1 protein expression leads to CDK6 degradation via autophagy, and the following TFEB and TFE3 nuclear translocation inhibition leading to the lysosome‐related genes levels downregulation. Moreover, it is found that the expression of CDK6 is higher in SCLC tumors than in normal tissue and it is associated with the survival and prognosis of SCLC patients. Finally, these findings demonstrate that combining CDK4/6is with chemotherapy treatment may serve as a potential therapeutic option for SCLC patients.
Databáze: Directory of Open Access Journals
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje