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- W4366140313 abstract "<div><p>Cancer stem cells (CSC) within non–small cell lung carcinoma (NSCLC) tumors drive NSCLC progression, metastasis, relapse, and intrinsic chemoresistance. Understanding the mechanisms that support the malignant phenotypes of NSCLC CSCs may provide insights for improved NSCLC therapeutic interventions. Here, we report that expression of RAB27B, a small GTPase, is significantly upregulated in NSCLC CSCs when compared with bulk cancer cells (BCC). Short hairpin RNA–mediated knockdown of RAB27B leads to a loss of stem cell marker gene expression and reduced NSCLC spheroid growth, clonal expansion, transformed growth, invasion, and tumorigenicity. We find that NSCLC CSCs secrete significantly more extracellular vesicles (EV) than BCCs, and that this is RAB27B-dependent. Furthermore, CSC-derived EVs, but not BCC-derived EVs, induce spheroid growth, clonal expansion, and invasion in BCCs. Finally, RAB27B is required for CSC-derived EV-induced stemness in BCCs. Taken together, our results indicate that RAB27B is required for maintenance of a highly tumorigenic, cancer-initiating, invasive stem-like cell population in NSCLC and RAB27B is involved in propagating EV-mediated communication from NSCLC CSCs to BCCs. Our findings further suggest that inhibition of RAB27B-dependent EV secretion may be a potential therapeutic strategy for NSCLC.</p>Significance:<p>Expression of RAB27B in CSCs leads to elevated levels of EVs that mediate communication between CSCs and BCCs that maintains a stem-like phenotype in NSCLC cells.</p></div>" @default.
- W4366140313 created "2023-04-19" @default.
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- W4366140313 date "2023-04-17" @default.
- W4366140313 modified "2023-09-27" @default.
- W4366140313 title "Data from RAB27B Drives a Cancer Stem Cell Phenotype in NSCLC Cells Through Enhanced Extracellular Vesicle Secretion" @default.
- W4366140313 doi "https://doi.org/10.1158/2767-9764.c.6603196" @default.
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