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Journal Article
Research Support, Non-U.S. Gov't
Seminal plasma protein in renal cell carcinoma: expression of semenogelin I is a predictor for cancer progression and prognosis.
Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine 2014 September
The incidence of renal cell carcinoma (RCC) has been steadily rising each year. There are currently few recognized biomarkers for the diagnosis and prognosis of RCC. We investigated semenogelin I (Sg I) expression and its clinical significance in patients with RCC. The expression levels of Sg I and its protein were measured by qPCR and Western blotting, respectively. Immunohistochemistry was used to investigate the protein expression of Sg I in RCC and normal renal tissue from 53 patients. The Kaplan-Meier method and log-rank test were used to evaluate the data. By qRCR (p < 0.01) and Western blot, the level of Sg I expression in benign tissues was higher than that in RCC tissues. Expression of Sg I was observed in 30 (57 %) RCC cases, which was significantly lower than that observed in benign renal tissues from the same patients [Sg I positive in 53 (100 %) cases (p < 0.0001)] by immunohistochemistry. There was an inverse relation between Sg I expression and clinical stage (pT1-2 vs pT3-4, p < 0.0001). Patients with Sg I-negative tumor had a significantly higher risk of recurrence (Kaplan-Meier and log-rank tests, p < 0.0001). There was low Sg I expression in RCC. Sg I expression has potential value in predicting cancer progression and prognosis. These findings support the use of Sg I as a novel biomarker for RCC.
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