Objective: To investigate the expression of zinc ribbon domain-containing1 (ZNRD1) in human renal cell carcinoma and normal kidney tissues.
Methods: The expression of ZNRD1 protein was examined by immunohistochemical staining in 71 renal cell carcinomas and 24 samples of normal kidney tissue. The correlation between the expressions of ZNRD1 protein and clinicopathologic features was analyzed. The expression of ZNRD1 mRNA and ZNRD1 protein was detected by quantitative reverse transcriptase-polymerase chain reaction (PT-PCR) and Western blot in 20 renal cell carcinomas and corresponding adjacent non-cancerous tissues.
Results: ZNRD1 protein was detected mostly in the cell nuclei by immunohistochemistry. The positive expression rate of ZNRD1 protein was 91.7% (22/24) in renal cell carcinomas and 20.8% (5/24) in the normal kidney tissues, with a statistically significant difference between cancer and normal kidney tissue (P < 0.01). However, no significant correlation was observed between ZNRD1 protein expression level and clinicopathologic features (P > 0.05). ZNRD1 mRNA expression level was significantly higher in renal cell carcinomas (0.6186) than that in the normal kidney tissues (0.4273) assessed by RT-PCR (P < 0.01). The expression level of ZNRD1 protein by Western blot was 0.5623 in renal cell carcinomas, significantly higher than that in normal kidney tissues (0.3885, P < 0.01).
Conclusion: ZNRD1 gene and ZNRD1 protein may play an important role in the carcinogenesis of renal cell carcinoma. Further investigation is still needed.
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