Antiproliferative Effect of NS-398, a Cyclooxygenase- 2 Inhibitor in TPC-1 Thyroid Cancer Cell Line / 대한내분비외과학회지
Korean Journal of Endocrine Surgery
; : 106-112, 2003.
Article
en Ko
| WPRIM
| ID: wpr-39890
Biblioteca responsable:
WPRO
ABSTRACT
PURPOSE: Cyclooxygenase (COX) enzymes catalyze the ratelimiting step in arachidonate metabolism. COX-1 is expressed constitutively in many cell types. However COX-2 is an inducible enzyme responsible for prostaglandin production at site of inflammation. Recently, there has been increasing evidence that COX-2 involves in development and progression of human tumors. The aim of the present investigation is to evaluate the antiproliferative effect of NS-398, a selective COX-2 inhibitor, and its mechanism in a papillary thyroid cancer cell line, TPC-1. METHODS: We used TPC-1 cell line, NS-398 and EGF. COX-2 expression was detected by RT-PCR and western blot. We used MTT assay to evaluate antiproliferative effect of NS- 398. The mechanisms of growth inhibition were evaluated by apoptosis assay and cell cycle analysis using flow cytometry. RESULTS: COX-2 expression was identified by both RT-PCR and western blot in TPC-1 cells and it was upregulated by serum, EGF (10 ng/ml), and NS-398 (50 mM). NS-398 induced a dose-dependent inhibition of cell proliferation but did not increases apoptotic cell population significantly in the TPC-1 cell line. EGF treatment (10 ng/ml) for 72 hours did not seem to change the antiproliferative effect of NS-398. The proportion of G0/G1 cell cycle was increased by 10% compared with control after 36 hours of treatment with NS-398. CONCLUSION: TPC-1 cells expressed COX-2 constitutively and its expression was upregulated by serum, EGF, and NS-398. The selective COX-2 inhibitor, NS-398 inhibited cell proliferation in TPC-1 cell line rather by cell cycle arrest at G₀/G₁ phase than by inducing apoptosis.
Palabras clave
Texto completo:
1
Índice:
WPRIM
Asunto principal:
Glándula Tiroides
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Neoplasias de la Tiroides
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Ciclo Celular
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Línea Celular
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Western Blotting
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Prostaglandina-Endoperóxido Sintasas
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Apoptosis
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Proliferación Celular
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Factor de Crecimiento Epidérmico
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Ciclooxigenasa 2
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
Ko
Revista:
Korean Journal of Endocrine Surgery
Año:
2003
Tipo del documento:
Article