Correlations between thymidylate synthase expression and chemosensitivity to 5-fluorouracil, cell proliferation and clinical outcome in head and neck squamous cell carcinoma.

Abstract:

BACKGROUND:5-Fluorouracil (5-FU) is a widely used drug in head and neck squamous cell carcinoma (HNSCC). Thymidylate synthase (TS), which is the target enzyme of 5-FU, has been demonstrated to be a key regulatory enzyme. In this study, we examined whether TS expression is correlated with chemosensitivity to 5-FU, cell proliferation and clinical outcome in HNSCC. METHODS:An antisense TS cDNA was constitutively expressed in the HNSCC cell line. The effects of TS expression on in vitro cell growth and 5-FU cytotoxicity were examined. We also evaluated the association between TS expression and cell proliferation in surgical specimens, and prognosis in HNSCC patients. RESULTS:Antisense TS transfection increases the cytotoxicity of 5-FU and inhibits cell proliferation in HNSCC cells in vitro. Immunohistochemical expression of TS may have prognostic value in patients with HNSCC. CONCLUSIONS:These results indicate that TS expression plays an important role in the sensitivity of HNSCC to 5-FU chemotherapy.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Yasumatsu R,Nakashima T,Uryu H,Ayada T,Wakasaki T,Kogo R,Masuda M,Fukushima M,Komune S

doi

10.1159/000175465

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

36-41

issue

1

eissn

0009-3157

issn

1421-9794

pii

000175465

journal_volume

55

pub_type

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