Dasatinib induces apoptosis and autophagy by suppressing the PI3K/Akt/mTOR pathway in bladder cancer cells

• Published in: Investigative and clinical urology Vol. 65; no. 6; pp. 593 - 602
• Main Authors: Ho, Jin-Nyoung, Byun, Seok-Soo, Kim, Danhyo, Ryu, Hoyoung, Lee, Sangchul
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Urological Association 01.11.2024; Korean Urological Association; 대한비뇨의학회
• Subjects: anticancer; Antineoplastic Agents - pharmacology; apoptosis; Apoptosis - drug effects; autophagy; Autophagy - drug effects; bladder cancer; Cell Line, Tumor; Cell Proliferation - drug effects; dasatinib; Dasatinib - pharmacology; Humans; Original; Phosphatidylinositol 3-Kinases - metabolism; Protein Kinase Inhibitors - pharmacology; Proto-Oncogene Proteins c-akt - metabolism; Signal Transduction - drug effects; TOR Serine-Threonine Kinases - metabolism; Urinary Bladder Neoplasms - drug therapy; Urinary Bladder Neoplasms - metabolism; Urinary Bladder Neoplasms - pathology; 비뇨기과학; Dasatinib; Anticancer; Autophagy; Bladder cancer; Apoptosis
• ISSN: 2466-0493; 2466-054X; 2466-054X
• DOI: 10.4111/icu.20240250

Bladder cancer is a common genitourinary malignant disease worldwide. Dasatinib is a small molecule inhibitor of Src family kinases. We investigated the anticancer effect and putative molecular mechanisms of dasatinib on T24 and cisplatin-resistant T24R2 human bladder cancer cells. Cell proliferation was measured using Cell Counting Kit-8 (CCK-8) and colony formation in dasatinib treated bladder cancer cells. Flow cytometry was used to determined cell cycle arrest and apoptosis. The expression of apoptosis and autophagy related proteins were detected by western blot analysis. In bladder cancer cells, dasatinib significantly reduced cell proliferation, colony formation, and induced G1-phase arrest. Dasatinib triggered apoptosis along with an increased expression of apoptosis-related genes (caspases, PARP, and cytochrome c). Down-regulation of Bcl-2 and up-regulation of Bad, which are hallmarks of apoptosis, were found to play a dominant role in mediating the effects of dasatinib treatment. We further showed that dasatinib inhibits p-Src, p-PI3K, p-Akt, and p-mTOR in bladder cancer cells. Dasatinib also increased the expression of markers of autophagy flux such as LC3-II and p62. These results confirmed that dasatinib is a potent chemotherapeutic drug which induces apoptosis and autophagy by suppressing the PI3K/Akt/mTOR pathway in bladder cancer cells.