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Objective: To study the expression of PKD2 gene in human kidney and other tissues. Methods: The expression of PKD2 was detected by reverse transcription PCR(RT-PCR) and in situ hybridization(ISH). The results of ISH were analyzed by micromegakargocytes. Results: Distribution of pkd-2 in normal adult kidney was stronger in proximal convoluted tubule, Henles loop ascending branch, distal convoluted tubule and cortical collecting ducts, and inferior signal were observed in fetal kidney. Negative was seen in ADPKD 2 kidney. Conclusion: Down-regulation of PKD2 gene expression in kidney may take effect on the occurrence and development of ADPKD2.