ArticleDiscover oncology2025
Functional role of cancer stem cell like exosomes on survival and drug resistance behaviors of colorectal cancer cells.
Article in Discover oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study aimed to evaluate the potential impact of colorectal cancer stem cell exosomes (CRC CSCs-enriched exosomes/CSCs-EXOs) on drug resistance and cell proliferation of CRC tumor cells.
methodsCSCs were enriched from HT-29 cells and characterized by sequential sphere formation, real-time PCR analysis of key stemness genes, and CRC-CSCs markers. The gene expression related to ABC transporters was analyzed in HT-29, HT-29 CSCs, and Caco-2 cells. CSCs-EXOs and parental-EXOs were isolated and characterized from HT-29 cells. The gene expression related to ABC transporters was investigated in Caco-2 cells treated with CSCs-EXOs and parental-EXOs of HT-29 cells by real-time PCR. The survival rate of exosome-treated Caco-2 cells was also studied in the presence of 5-fluorouracil (5-FU) at the IC50 concentration using MTT assay.
resultsColonospheres were found to have the ability to form serial spheres, along with the upregulatation of the key stemness genes (p-value ≤ 0.05). The expression of CRC-CSCs markers significantly increased relative to their parental counterparts (p-value ≤ 0.05). Treatment of Caco2 cells with CSCs-EXOs and their parental-EXOs revealed a substantial elevation in expression of drug resistance genes relative to those treated with their parental-EXOs (p-value ≤ 0.0001). The combination treatment of cells with exosomes and 5-FU at the IC50 concentration led to a more pronounced decrease in cell viability in all groups compared to applying 5-FU at the same concentration.
conclusionOur findings underscore the significance of targeting the CSCs-exosome axis as a prospective therapeutic strategy to overcome drug resistance. Upcoming studies ought to concentrate on exploring the molecular machinery of CSCs and tumor cells plasticity through the exosome-mediated functions.
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