DOI

  • Paul Noordhuis
  • Adrianus C. Laan
  • Kasper van de Born
  • Richard J. Honeywell
  • Godefridus J. Peters

Oxaliplatin (OHP) treatment of colorectal cancer (CRC) frequently leads to resistance. OHP resistance was induced in CRC cell lines LoVo-92 and LoVo-Li and a platinum-sensitive ovarian cancer cell line, A2780, and related to cellular platinum accumulation, platinum-DNA adducts, transporter expression, DNA repair genes, gene expression arrays, and array-CGH profiling. Pulse (4 h, 4OHP) and continuous exposure (72 h, cOHP) resulted in 4.0 to 7.9-fold and 5.0 to 11.8-fold drug resistance, respectively. Cellular oxaliplatin accumulation and DNA-adduct formation were decreased and related to OCT1-3 and ATP7A expression. Gene expression profiling and pathway analysis showed significantly altered p53 signaling, xenobiotic metabolism, role of BRCA1 in DNA damage response, and aryl hydrocarbon receptor signaling pathways, were related to decreased ALDH1L2, Bax, and BBC3 (PUMA) and increased aldo-keto reductases C1 and C3. The array-CGH profiles showed focal aberrations. In conclusion, OHP resistance was correlated with total platinum accumulation and OCT1-3 expression, decreased proapoptotic, and increased anti-apoptosis and homologous repair genes.

Original languageEnglish
Article number3619
Number of pages18
JournalInternational Journal of Molecular Sciences
Volume20
Issue number15
DOIs
Publication statusPublished - 2019
Externally publishedYes

    Research areas

  • Array comparative genomic hybridization, Gene expression, Oxaliplatin resistance, Platinum accumulation, Platinum DNA adducts, oxaliplatin resistance, platinum accumulation, platinum DNA adducts, array comparative genomic hybridization, gene expression

ID: 56662608