Glucosamine decreases the stemness of human ALDH+ breast cancer stem cells by inactivating STAT3

Oncology Letters
Rendy HoseaSeptelia Inawati Wanandi

Abstract

Cancer stem cells (CSCs) are a subpopulation of cancer cells responsible for tumor maintenance and relapse due to their ability to resist various anticancer effects. Owing to the resistance of CSCs to the effects of targeted therapy, an alternative strategy that targets post-translational glycosylation may be an improved approach to treat cancer as it disrupts multiple coordinated signaling that maintains the stemness of CSCs. Glucosamine acts as an anticancer agent possibly by inhibiting N-linked glycosylation. The aim of the present study was to investigate the effect of glucosamine on the stemness of breast CSCs, which is regulated by signal transducer and activator of transcription 3 (STAT3) signaling. Human aldehyde dehydrogenase-positive (ALDH+) breast CSCs and MCF7 cells were treated with various concentrations (0.25, 1 or 4 mM) of glucosamine for 24 h. Subsequently, cell viability was determined by performing a trypan blue exclusion assay, pluripotency gene [ALDH 1 family member A1 (ALDH1A1), octamer-binding transcription factor 4 (OCT-4), and Krüppel-like factor 4 (KLF4)] expression was determined using the reverse transcription-quantitative polymerase chain reaction, and STAT3 and phosphorylated STAT3 (pSTAT3) levels ...Continue Reading

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