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- W2017002322 abstract "Gemcitabine (Gemzar; Eli Lilly and Company, Indianapolis, IN) and cisplatin are commonly used in the treatment of many solid tumors, although the impact of chemotherapy is limited in metastatic non-small cell lung cancer. However, in clinical practice, there is a minority of patients who can attain long-term survival. Upregulation of mRNA transcripts has been linked to chemoresistance, and in some instances, mRNA expression has been correlated with polymorphisms. Cisplatin resistance is directly linked to the nucleotide excision repair system, specifically to the transcription-coupled nucleotide excision repair pathway that involves genes that are deficient in rare inborn disorders such as Cockayne syndrome and xeroderma pigmentosum. Overexpression of ERCC1 correlates with poor survival in gemcitabine/cisplatin-treated non-small cell lung cancer patients. At the preclinical level, ERCC1 and XPD mRNA expression correlate with each other, and overexpression of XPD causes selective cisplatin resistance in human tumor cell lines. XPD polymorphisms have been associated with lower DNA repair capacity. In our experience, time to progression is significantly higher in gemcitabine/cisplatin-treated patients with the Lys751Gln genotype (9.6 months) than in those with the Lys751Lys genotype (4.2 months; P = .03). Other polymorphisms involved in parallel DNA repair systems may well provide the same information, indicating a high degree of biologic redundancy. The overexpression of the subunit M1 of ribonucleotide reductase (RRM1) has been linked to gemcitabine resistance in our retrospective assessment. Preliminary findings that a subset of gemcitabine/cisplatin-treated patients with low ERCC1 and RRM1 mRNA levels show a significantly longer survival and highlight the possibilities of individually tailored chemotherapy." @default.
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- W2017002322 date "2009-09-01" @default.
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- W2017002322 title "1096 Molecular signatures of disseminated tumour cells in metastatic breast cancer patients" @default.
- W2017002322 doi "https://doi.org/10.1016/s1359-6349(09)70389-1" @default.
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