The effect of cyclooxygenase-2 on lymphangiogenesis in breast cancer / 中华外科杂志
Chinese Journal of Surgery
; (12): 132-135, 2008.
Article
Dans Zh
| WPRIM
| ID: wpr-237846
Responsable en Bibliothèque :
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of cyclooxygenase-2 (COX-2) on lymphangiogenesis in breast cancer.</p><p><b>METHODS</b>By the means of immunohistochemistry, COX-2, vascular endothelial growth factor-C (VEGF-C) and D2-40 were examined in the tissue samples of primary tumors from 94 patients underwent surgical resections for breast cancer from November 1998 to March 2002. Eighty-three patients were followed-up. The expressions of VEGF-C mRNA and protein were detected by reverse transcription polymerase chain reaction (RT-PCR) and Western blot in MDA-MB-231 cell lines by the treatment of selective COX-2 inhibitor Nimesulide at different doses. The expressions of VEGF-C protein were evaluated in MDA-MB-231 cells treated by PGE2 (1 microg/ml) and Trastuzumab (1 microg/ml), respectively.</p><p><b>RESULTS</b>COX-2 over-expression was observed in 46.8% of surgical specimens (44/94), while VEGF-C overexpression occurred in 51.1% of tumor samples (48/94). COX-2 was strongly correlated with VEGF-C expression (P < 0.01), micro-lymphatic vessels (P = 0.032) and metastatic lymph nodes (P = 0. 035). Patients with COX-2 positive tumors had a significant shorter survival time than those with negative tumors did, including disease-free survival (P = 0.010) and overall survival (P = 0.040). Nimesulide could down-regulate the expressions of VEGF-C mRNA and protein in a does-dependent manner, while PGE2 could up-regulate the expressions. The expression of VEGF-C protein up-regulated by PGE2 treatment was decreased by Trastuzumab.</p><p><b>CONCLUSIONS</b>COX-2 over-expression can up-regulate the expression of VEGF-C. VEGF-C might promote lymph node metastasis by a lymph-angiogenic pathway, then affect the prognosis of the patients with breast cancer.</p>
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Anatomopathologie
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Physiologie
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Pronostic
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Tumeurs du sein
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Études de suivi
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Facteur de croissance endothéliale vasculaire de type C
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Lymphangiogenèse
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Cyclooxygenase 2
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Génétique
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Métastase lymphatique
Type d'étude:
Observational_studies
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Prognostic_studies
Limites du sujet:
Adolescent
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Adult
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Aged
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Female
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Humans
langue:
Zh
Texte intégral:
Chinese Journal of Surgery
Année:
2008
Type:
Article