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
Chemotherapyjournal_title
Chemotherapyauthors
Yasumatsu R,Nakashima T,Uryu H,Ayada T,Wakasaki T,Kogo R,Masuda M,Fukushima M,Komune Sdoi
10.1159/000175465subject
Has Abstractpub_date
2009-01-01 00:00:00pages
36-41issue
1eissn
0009-3157issn
1421-9794pii
000175465journal_volume
55pub_type
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