High claudin-7 expression is associated with a poor response to platinum-based chemotherapy in epithelial ovarian carcinoma
- Authors
- Kim, CJ[Kim, Chul Jung]; Lee, JW[Lee, Jeong-Won]; Choi, JJ[Choi, Jung-Joo]; Choi, HY[Choi, Hye Young]; Park, YA[Park, Young-Ae]; Jeon, HK[Jeon, Hye-Kyung]; Sung, CO[Sung, Chang Ohk]; Song, SY[Song, Sang Yong]; Lee, YY[Lee, Yoo-Young]; Choi, CH[Choi, Chel Hun]; Kim, TJ[Kim, Tae-Joong]; Lee, JH[Lee, Je-Ho]; Kim, BG[Kim, Byoung-Gie]; Bae, DS[Bae, Duk-Soo]
- Issue Date
- Apr-2011
- Citation
- EUROPEAN JOURNAL OF CANCER, v.47, no.6, pp.918 - 925
- Indexed
- SCIE
SCOPUS
- Journal Title
- EUROPEAN JOURNAL OF CANCER
- Volume
- 47
- Number
- 6
- Start Page
- 918
- End Page
- 925
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/70403
- DOI
- 10.1016/j.ejca.2010.11.007
- ISSN
- 0959-8049
- Abstract
- Background: Claudin-7 (CLDN-7) is a tight junction protein that has been shown overexpressed in several human cancers. We investigated prognostic significance of CLDN-7 overexpression in patients with epithelial ovarian carcinoma (EOC) and its functional role on cell proliferation in ovarian carcinoma cell lines. Patients and methods: CLDN-7 expression was evaluated by real-time RT-PCR and immunohistochemical analysis in 71 patients with EOC. We assessed the association of CLDN-7 expressions with prognosis of the patients including sensitivity to platinum-based chemotherapy. In vitro experiment was performed with and without inhibition of CLDN-7 by its siRNA to evaluate the sensitivity of the human ovarian cancer cells to cisplatin chemotherapy. Results: CLDN-7 transcripts in EOCs were significantly up-regulated compared with normal ovarian tissues (P < 0.001). The expression of CLDN-7 protein was observed in majority (69/71, 97.1%) of the EOCs but not in normal ovarian tissues (P < 0.001). High CLDN-7 expression in primary tumour correlated with shorter progression-free survival (PFS) of the patients (P = 0.005) and poor sensitivity to platinum-based chemotherapy (P = 0.024). Moreover, CLDN-7 was highly expressed in 2774 and HeyA8 human ovarian cancer cells and inhibition of CLDN-7 by its siRNA significantly enhanced the sensitivity of 2774 and HeyA8 cells to cisplatin treatment. Conclusion: These findings suggest CLDN-7 expression is an independent prognostic factor for PFS and it may play a role in regulating response to platinum-based chemotherapy in the treatment of EOC. (C) 2010 Elsevier Ltd. All rights reserved.
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