Abstract
Background/Aim: We examined the inhibitory effects of both glyoxalase 1 (GLO 1) and protein kinase C (PKC)λ in aldehyde dehydrogenase 1 (ALDH1)-positive breast cancer stem cells (CSCs). Materials and Methods: Breast cancer genomics datasets (TCGA, n=593; METABRIC, n=1904) were downloaded and statistically analyzed. The effects of GLO 1 and PKCλ on trypan blue staining and tumor-sphere formation by ALDH1high cells derived from triple negative breast cancer (TNBC) and basal-like breast cancer were examined. Results: GLO 1high, PKCλhigh, and ALDH1A3high tumors were enriched in stage I/II/III/IV samples, associated with the HER2 and TNBC subtypes according to receptor status, and associated with the HER2-enriched and basal-like subtypes according to PAM50. Inhibition of either GLO 1 (TLSC702) or PKCλ (ANF) suppressed tumor-sphere formation and enhanced death in ALDH1high cells. TLSC702 also effectively inhibited tumor-sphere formation and induced death in PKCλ knockout ALDH1high cells. Conclusion: GLO 1 and PKCλ are important for the survival of ALDH1-positive breast CSCs, and may represent potential therapeutic targets for the treatment of ALDH1-positive breast CSCs.
Original language | English |
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Pages (from-to) | 5959-5971 |
Number of pages | 13 |
Journal | Anticancer research |
Volume | 41 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2021 |
Keywords
- ALDH1A3
- Breast cancer
- Cancer stem cell
- GLO 1
- PKCλ