{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["12(12)"],"submitter":["Li T"],"pubmed_abstract":["<h4>Background</h4>High levels of thymidylate synthase (TS) and dihydrofolate reductase (DHFR) expression in tumour tissues are an indicator of ineffective responses to pemetrexed-based chemotherapy in various tumours, including non-small cell lung cancer (NSCLC). However, tumour tissues are highly heterogeneous, so a single biopsy may not reflect genetic alterations during disease progression. This study investigated the potential use of plasma TS and DHFR mRNA levels as biomarkers for predicting sensitivity to pemetrexed-based chemotherapy.<h4>Methods</h4>Plasma samples were obtained from 245 patients with advanced NSCLC and 30 healthy donors. Total RNA was extracted from the plasma samples, and TS and DHFR mRNA levels were determined via real-time PCR. TS and DHFR mRNA levels between ca"],"journal":["Journal of thoracic disease"],"pagination":["7313-7319"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC7797849"],"repository":["biostudies-literature"],"pubmed_title":["Plasma thymidylate synthase and dihydrofolate reductase mRNA levels as potential predictive biomarkers of pemetrexed sensitivity in patients with advanced non-small cell lung cancer."],"pmcid":["PMC7797849"],"pubmed_authors":["Lu JG","Li T","Zhang XD","Huang JB","Shi XR","Li R","Shi MX","Wang Y"],"additional_accession":[]},"is_claimable":false,"name":"Plasma thymidylate synthase and dihydrofolate reductase mRNA levels as potential predictive biomarkers of pemetrexed sensitivity in patients with advanced non-small cell lung cancer.","description":"<h4>Background</h4>High levels of thymidylate synthase (TS) and dihydrofolate reductase (DHFR) expression in tumour tissues are an indicator of ineffective responses to pemetrexed-based chemotherapy in various tumours, including non-small cell lung cancer (NSCLC). However, tumour tissues are highly heterogeneous, so a single biopsy may not reflect genetic alterations during disease progression. This study investigated the potential use of plasma TS and DHFR mRNA levels as biomarkers for predicting sensitivity to pemetrexed-based chemotherapy.<h4>Methods</h4>Plasma samples were obtained from 245 patients with advanced NSCLC and 30 healthy donors. Total RNA was extracted from the plasma samples, and TS and DHFR mRNA levels were determined via real-time PCR. TS and DHFR mRNA levels between ca","dates":{"release":"2020-01-01T00:00:00Z","publication":"2020 Dec","modification":"2025-04-04T19:53:56.248Z","creation":"2025-04-04T19:53:56.248Z"},"accession":"S-EPMC7797849","cross_references":{"pubmed":["33447420"],"doi":["10.21037/jtd-20-3185"]}}