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JNCI Journal of the National Cancer Institute 2001 93(1):45-50; doi:10.1093/jnci/93.1.45
© 2001 by Oxford University Press
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Journal of the National Cancer Institute, Vol. 93, No. 1, 45-50, January 3, 2001
© 2001 Oxford University Press

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Detecting Bladder Cancer in the Chinese by Microsatellite Analysis: Ethnic and Etiologic Considerations

Jianjun Zhang, Zhenbin Fan, Yanning Gao, Zejun Xiao, Changling Li, Qian An, Shujun Cheng

Affiliations of authors: J. Zhang, Z. Fan, Y. Gao, Q. An, S. Cheng (Department of Chemical Etiology and Carcinogenesis), Z. Xiao, C. Li (Department of Urology), Cancer Institute (Hospital), Chinese Academy of Medical Science and Peking Union Medical College, Beijing.

Correspondence to: Shujun Cheng, M.D., Department of Chemical Etiology and Carcinogenesis, Cancer Institute (Hospital), CAMS and PUMC, P.O. Box 2258, Beijing 100021, People's Republic of China (e-mail: chengsj{at}pubem.cicams.ac.cn

Background: Microsatellite analysis of urine sediments has shown promise as a highly sensitive and specific technique for the detection of bladder cancer. However, most studies have been conducted in Western countries with Caucasian subjects. We explored the potential of microsatellite analysis for detecting bladder cancer in Chinese people. Methods: We performed microsatellite analysis of surgical specimens and urine sediment cells collected from Chinese patients with bladder tumors. Those microsatellite markers giving clearly readable patterns and showing susceptibility to alterations were used as a panel to detect primary tumors. A blinded study of additional patients with bladder cancer was performed to investigate the practical value of this panel for detecting bladder cancer. All statistical tests were two-sided. Results: Thirty-eight bladder tumors and corresponding urine sediment specimens were initially screened for 60 microsatellite markers from 18 chromosomes. Nine markers, most of which were different from those that had been used for Western patients, with frequent alterations in the initial patients were selected for further analysis. In the subsequent blinded experiment, microsatellite alterations were observed in urine sediments from 22 (96%) of 23 patients with bladder cancer and from all three patients with inverted papilloma. None of the urine sediments from the one patient with bladder lipoma, from the one patient with neurofibroma, or from the 12 individuals without evidence of bladder tumor showed any microsatellite alterations. Conclusions: Microsatellite analysis of urine sediments could be a practical method for detecting bladder cancer in the Chinese. Our identification of different microsatellite markers highlights possible ethnic and etiologic disparities between the Chinese and Western bladder cancer patients.


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