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- W1988346069 abstract "Monitoring of molecular markers is indispensable for deciding subsequent treatment after acquired resistance to molecular-targeted therapy. According to results using re-biopsy, EGFR T790M mutation and overexpression of hepatocyte growth factor (HGF) are major mechanisms of acquired resistance to epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs). The aim of the present study was to assess whether quantification of HGF using peripheral blood in addition to detection of T790M with plasma DNA is useful for monitoring as an alternative to invasive re-biopsy. HGF levels in plasma were determined using ELISA and T790M mutation was detected using mutation-biased PCR and quenched probe system (MBP-QP). The median level of HGF in plasma at baseline was 140 pg/ml and was significantly higher in the advanced stage of cancer and in smokers and predicted poor survival as determined using 315 plasma samples from 225 lung cancer patients. T790M was detected with plasma DNA in 9 of 16 patients who acquired resistance to EGFR-TKIs and a greater than 1.5-fold elevation compared with pretreatment HGF levels was observed in 6 patients after acquired resistance. Eleven of 16 patients (69%) showed either HGF elevation or T790M in plasma samples, with both outcomes observed in 25% of patients; this is consistent with results based on re-biopsy reported from other laboratories. Considering these results, assessing HGF and T790M using peripheral blood could be useful for monitoring mechanisms of acquired resistance to EGFR-TKIs." @default.
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- W1988346069 date "2014-10-22" @default.
- W1988346069 modified "2023-10-17" @default.
- W1988346069 title "Usefulness of plasma HGF level for monitoring acquired resistance to EGFR tyrosine kinase inhibitors in non-small cell lung cancer" @default.
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- W1988346069 doi "https://doi.org/10.3892/or.2014.3560" @default.
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