• Department of Thyroid Surgery, The Affiliated Hospital of Guiyang Medical College, Guiyang 550004, China;
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Objective To detect the expression of KiSS-1 protein in papillary thyroid carcinoma, and to analyze its significance.
Methods Paraffin-embedded specimens of 32 patients with thyroid papillary carcinoma and its adjacent cancer tissues were included in this study. Then the expression of KiSS-1 protein was detected by munohistochemistry and its relationship with clinical pathological features was analyzed.
Results KiSS-1 protein mainly expressed in the cell membrane and cytoplasm. The expression of KiSS-1 protein was positive in adjacent tissues, but decreased or absent in cancer tissues in 32 patients. In the latter, there were 11 cases with positive expression (34.4%) and 21 cases with negative expression (65.6%), and the difference was statistically significant (χ2=31.256, P lt;0.001). The average value of KiSS-1 protein expression represented by absorbance (A) value (119.595 2) in cancer tissues was higher than that in adjacent tissues (174.805 0), t=34.429, P lt;0.001. The expression of KiSS-1 protein in cancer tissues was not related to patient gender (P=0.618) and age (P=0.061), but except TNM staging (P=0.034). The expression rate of KiSS-1 protein in cancer tissues with lymph node metastasis (4/4, 100%) was significantly higher than that without lymph node metastasis (7/28, 25.0%), P=0.003.
Conclusion The expression of KiSS-1 protein is decreased or absent in papillary thyroid carcinoma, which may be involved in tumorigenesis, invasion, and metastasis.

Citation: GAO Rongjun,WANG Nanpeng,YE Hui,GAO Qingjun,ZHOU Yan,DUAN Haisong,ZHAO Daiwei.. Expression and Clinical Significance of Tumor Suppressor Gene KiSS-1 in Papillary Thyroid Carcinoma. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2010, 17(8): 775-779. doi: Copy