These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Thymidylate synthase and dihydropyrimidine dehydrogenase expression in oral squamous cell carcinoma: an immunohistochemical and clinicopathologic study.
    Author: Kawasaki G, Yoshitomi I, Yanamoto S, Mizuno A.
    Journal: Oral Surg Oral Med Oral Pathol Oral Radiol Endod; 2002 Dec; 94(6):717-23. PubMed ID: 12464897.
    Abstract:
    OBJECTIVE: Thymidylate synthase (TS) is the target enzyme for 5-fluorouracil (5-FU), and dihydropyrimidine dehydrogenase (DPD) is the first enzyme that metabolizes 5-fluorouracil. Until now, only the enzyme activities of TS and DPD have been investigated; however, there are few reports about the immunohistochemistry of TS and DPD and none regarding oral carcinoma. The purpose of this article was to investigate the expression of TS and DPD in oral squamous cell carcinoma. STUDY DESIGN: In this study, 109 oral squamous cell carcinomas were investigated for the immunohistochemical expression of TS and DPD proteins. RESULTS: The expressions of TS in carcinoma cases was significantly higher than in controls (P <.05, t test). DPD was expressed both in carcinomas and in areas adjacent to the carcinomas. There was no correlation between the clinical factors and the TS labeling index or between the clinical factors and the DPD labeling index (DPD-LI). Pathologically, DPD-LI was significantly different in both the World Health Organization classification and Anneroth's classification. The TS labeling index was significantly correlated with the Ki-67 LI (P <.05, Pearson's correlation coefficient). Although TS showed no correlation between tegafur-uracil response and TS labeling index, there was a significant correlation between the tegafur-uracil response and DPD-LI. CONCLUSIONS: TS may reveal tumor cell proliferation, but DPD-LI may correlate with a response to anticancer drug treatment.
    [Abstract] [Full Text] [Related] [New Search]