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Erschienen in: Tumor Biology 1/2014

01.01.2014 | Research Article

Effects of ellipticine on ALDH1A1-expressing breast cancer stem cells—an in vitro and in silico study

verfasst von: Santhi Latha Pandrangi, Rajasekhar Chikati, Pradeep Singh Chauhan, Chitta Suresh Kumar, Anropa Banarji, Sunita Saxena

Erschienen in: Tumor Biology | Ausgabe 1/2014

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Abstract

Targeting breast cancer stem cells (BCSCs) offers a promising strategy for breast cancer treatment. We examined the plant alkaloid ellipticine for its efficacy to inhibit the expression of aldehyde dehydrogenase 1 class A1 (ALDH1A1)-positive BCSCs by in vitro and in silico methods. At 3 mM concentration, ellipticine decreased the expression of ALDH1A1-positive BCSCs by 62 % (p = 0.073) in the MCF7 cell line and by 53 % (p = 0.024) in the SUM159 cell line compared to vehicle-treated cultures. Ellipticine significantly reduced the formation of mammospheres, whereas paclitaxel enhanced mammosphere formation in both the treated cell lines. Interestingly, when treated with a combination of ellipticine and paclitaxel, the percentage of ALDH1A1-positive BCSCs dropped by several fold in vitro. A homology model of Homo sapiens ALDH1A1 was built using the crystal structure of NAD-bound sheep liver class I aldehyde dehydrogenase [PDB ID: 1BXS] as a template. Molecular simulation and docking studies revealed that the amino acids Asn-117 and Asn-121, Glu-249, Cys-302, and Gln-350, present in the active site of human ALDH1A1, played a vital role in interacting with the drug. The present study suggests that ellipticine reduces the proliferation and self-renewal ability of ALDH1A1-positive BCSCs and can be used in combination with a cytotoxic drug like paclitaxel for potential targeting of BCSCs.
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Metadaten
Titel
Effects of ellipticine on ALDH1A1-expressing breast cancer stem cells—an in vitro and in silico study
verfasst von
Santhi Latha Pandrangi
Rajasekhar Chikati
Pradeep Singh Chauhan
Chitta Suresh Kumar
Anropa Banarji
Sunita Saxena
Publikationsdatum
01.01.2014
Verlag
Springer Netherlands
Erschienen in
Tumor Biology / Ausgabe 1/2014
Print ISSN: 1010-4283
Elektronische ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-013-1099-y

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