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Acquired resistance to oxaliplatin is not directly associated with increased resistance to DNA damage in SK-N-ASrOXALI4000, a newly established oxaliplatin-resistant sub-line of the neuroblastoma cell line SK-N-AS.

ABSTRACT: The formation of acquired drug resistance is a major reason for the failure of anti-cancer therapies after initial response. Here, we introduce a novel model of acquired oxaliplatin resistance, a sub-line of the non-MYCN-amplified neuroblastoma cell line SK-N-AS that was adapted to growth in the presence of 4000 ng/mL oxaliplatin (SK-N-ASrOXALI4000). SK-N-ASrOXALI4000 cells displayed enhanced chromosomal aberrations compared to SK-N-AS, as indicated by 24-chromosome fluorescence in situ hybridisation. Moreover, SK-N-ASrOXALI4000 cells were resistant not only to oxaliplatin but also to the two other commonly used anti-cancer platinum agents cisplatin and carboplatin. SK-N-ASrOXALI4000 cells exhibited a stable resistance phenotype that was not affected by culturing the cells for 10 weeks in the absence of oxaliplatin. Interestingly, SK-N-ASrOXALI4000 cells showed no cross resistance to gemcitabine and increased sensitivity to doxorubicin and UVC radiation, alternative treatments that like platinum drugs target DNA integrity. Notably, UVC-induced DNA damage is thought to be predominantly repaired by nucleotide excision repair and nucleotide excision repair has been described as the main oxaliplatin-induced DNA damage repair system. SK-N-ASrOXALI4000 cells were also more sensitive to lysis by influenza A virus, a candidate for oncolytic therapy, than SK-N-AS cells. In conclusion, we introduce a novel oxaliplatin resistance model. The oxaliplatin resistance mechanisms in SK-N-ASrOXALI4000 cells appear to be complex and not to directly depend on enhanced DNA repair capacity. Models of oxaliplatin resistance are of particular relevance since research on platinum drugs has so far predominantly focused on cisplatin and carboplatin.

SUBMITTER: Saintas E

PROVIDER: S-EPMC5305101 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Acquired resistance to oxaliplatin is not directly associated with increased resistance to DNA damage in SK-N-ASrOXALI4000, a newly established oxaliplatin-resistant sub-line of the neuroblastoma cell line SK-N-AS.

Saintas Emily E Abrahams Liam L Ahmad Gulshan T GT Ajakaiye Anu-Oluwa M AM AlHumaidi Abdulaziz S H A M AS Ashmore-Harris Candice C Clark Iain I Dura Usha K UK Fixmer Carine N CN Ike-Morris Chinedu C Mato Prado Mireia M Mccullough Danielle D Mishra Shishir S Schöler Katia M U KM Timur Husne H Williamson Maxwell D C MD Alatsatianos Markella M Bahsoun Basma B Blackburn Edith E Hogwood Catherine E CE Lithgow Pamela E PE Rowe Michelle M Yiangou Lyto L Rothweiler Florian F Cinatl Jindrich J Zehner Richard R Baines Anthony J AJ Garrett Michelle D MD Gourlay Campbell W CW Griffin Darren K DK Gullick William J WJ Hargreaves Emma E Howard Mark J MJ Lloyd Daniel R DR Rossman Jeremy S JS Smales C Mark CM Tsaousis Anastasios D AD von der Haar Tobias T Wass Mark N MN Michaelis Martin M

PloS one 20170213 2

The formation of acquired drug resistance is a major reason for the failure of anti-cancer therapies after initial response. Here, we introduce a novel model of acquired oxaliplatin resistance, a sub-line of the non-MYCN-amplified neuroblastoma cell line SK-N-AS that was adapted to growth in the presence of 4000 ng/mL oxaliplatin (SK-N-ASrOXALI4000). SK-N-ASrOXALI4000 cells displayed enhanced chromosomal aberrations compared to SK-N-AS, as indicated by 24-chromosome fluorescence in situ hybridis ...[more]

PMID: 28192521

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Dataset Information

Acquired resistance to oxaliplatin is not directly associated with increased resistance to DNA damage in SK-N-ASrOXALI4000, a newly established oxaliplatin-resistant sub-line of the neuroblastoma cell line SK-N-AS.

Publications

Acquired resistance to oxaliplatin is not directly associated with increased resistance to DNA damage in SK-N-ASrOXALI4000, a newly established oxaliplatin-resistant sub-line of the neuroblastoma cell line SK-N-AS.

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