Expression of Claudin-1 and -7 in Clear Cell Renal Cell Carcinoma and Its Clinical Significance.
10.4111/kju.2011.52.5.317
- Author:
Hong Il SHIN
;
Byung Hoon KIM
;
Hyuk Soo CHANG
;
Chun Il KIM
;
Hye Ra JUNG
;
Choal Hee PARK
- Publication Type:Original Article
- Keywords:
Claudin 1;
Claudin 7;
Renal cell carcinoma
- MeSH:
Body Mass Index;
Carcinoma, Renal Cell;
Claudin-1;
Humans;
Neoplasm Metastasis
- From:Korean Journal of Urology
2011;52(5):317-322
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: We investigated the correlations between the expression of claudin-1 and claudin-7 in clear cell renal cell carcinoma (clear cell RCC) and clinical parameters. MATERIALS AND METHODS: The subjects of this study were 119 patients with confirmed clear cell RCC between January 2000 and December 2007. Their RCC tissues were immunohistochemically stained for claudin-1 and claudin-7. The correlations between the expression of claudin and parameters such as sex, age, body mass index (BMI), tumor size, TNM stage, Furhman nuclear grade, postoperative distant metastasis, and cancer-specific survival were analyzed. RESULTS: Among the total 119 subjects, claudin-1 was expressed in 18 (15.1%) and claudin- 7 in 31 (26.1%). Claudin-1 was expressed in patients who were older (p=0.007), who had a greater tumor size (p=0.001), who had a higher pathologic T stage (p=0.009), who had preoperative distant metastasis (p=0.035), and who had a higher Furhman nuclear grade (p=0.004). Claudin-7 was expressed only in patients who had a higher Furhman nuclear grade (p=0.031). The risk of postoperative distant metastasis was associated with the expression of claudin-1 (p<0.001) but not with the expression of claudin-7 (p=0.668). The expression of claudin-1 and -7 was not associated with cancer-specific survival (p>0.05). CONCLUSIONS: In clear cell RCC, claudin-1 was expressed in patients who were older and who had a greater tumor size, who had higher T or M stages, and who had a higher Furhman nuclear grade. The expression of claudin-1 was associated with a higher risk of postoperative distant metastasis.
