title: Comparative analysis of thymidylate synthase, thymidine phosphorylase and dihydropyrimidine dehydrogenase expression in colorectal cancer and surrounding normal tissue.
abstract: Thymidylate synthase [TS], thymidine phosphorylase [TP] and dihydropyrimidine dehydrogenase [DPD] play the essential role in the activation and catabolism of the fluoropyrimidines used in cancer therapy. Its expression may influence the antitumor activity or toxicity of these drugs. We studied the expression levels of selected enzymes in colorectal tumors and adjacent normal mucosa. The analysis of TS, TP and DPD gene expression was performed using quantitative Real time PCR technique (Roche) in 15 (TS), 64 (TP) and 12 (DPD) of 64 colorectal cancer patients. The mean gene expression of TS, TP and DPD was found to be 3.29; 3.79 and 8.24 in tumors and 1.88; 3.80 and 19.69 in normal mucosa. The corresponding median gene expression was 1.87; 2.32 and 4.50 for tumors and 2.14; 2.63 and 11.64 for normal tissue. We did not find any significant differences in TS, TP and DPD gene expression between colorectal tumor and surrounding mucosa.
authors.affiliation: Department of Oncology, General Teaching Hospital, 12880 Prague, Czech Republic. onkologie@seznam.cz
authors.forename: M
authors.initials: M
authors.lastname: Zimovjanova
authors.forename: V
authors.initials: V
authors.lastname: Sykora
authors.forename: J
authors.initials: J
authors.lastname: Novotny
authors.forename: J
authors.initials: J
authors.lastname: Gatek
authors.forename: L
authors.initials: L
authors.lastname: Petruzelka
authors.forename: L
authors.initials: L
authors.lastname: Holubec
authors.forename: L
authors.initials: L
authors.lastname: Pecen
mesh_terms: D015179:Colorectal Neoplasms / Q000201:enzymology*; D042943:Dihydrouracil Dehydrogenase (NADP) / Q000235:genetics / Q000378:metabolism*; D015870:Gene Expression; D006801:Humans; D007413:Intestinal Mucosa / Q000201:enzymology; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D013939:Thymidine Phosphorylase / Q000235:genetics / Q000378:metabolism*; D013940:Thymidylate Synthase / Q000235:genetics / Q000378:metabolism*
chemical_list: D012333:RNA, Messenger; D042943:Dihydrouracil Dehydrogenase (NADP); D013940:Thymidylate Synthase; D013939:Thymidine Phosphorylase