Resistance of stem-like cells from neuroblastoma cell lines to commonly used chemotherapeutic agents

Pediatric Blood & Cancer
Sharada D VangipuramWilliam D Lyman

Abstract

Cancer stem cell theory suggests that the presence of tumor initiating stem-like cells in cancers may be responsible for cancer progression and relapse. CD133 cell surface maker expression has been used to identify stem-like cells in cancer cell lines. Our goal was to identify such cells in neuroblastoma cell lines and to study the cytotoxicity of common anticancer drugs for those cells. CD133+ cells from SK-N-SH and SK-N-BE cell lines were isolated using magnetic microbeads. Cytotoxicity of four anticancer drugs was studied on CD133+ and CD133- populations. The percentage of live, apoptotic, and dead cells in each population after drug treatment was estimated by MTT and PI/Annexin-binding assays. Western blot analyses were used to identify differences in the expression of kinases. Eight to 10% of SK-N-SH and 3-5% of SK-N-BE cells were CD133+. These cells were more resistant than CD133- cells to all four chemotherapeutic agents tested in the MTT assay. Decreased apoptosis was observed in CD133+ cells compared to CD133- cells by PI/Annexin V-binding assay. Western blot analysis showed that CD133+ cells expressed less MKP-1. Phosphorylated forms of both ERK and P-38 kinases were expressed at higher levels in CD133+ cells than in ...Continue Reading

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Aug 14, 2012·Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine·Sharada D VangipuramWilliam D Lyman
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Jul 25, 2019·Cancers·Juergen Becker, Joerg Wilting

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