Detection of Telomerase RNA Component Gene Amplification in Cervical In- traepithelial Neoplasia and Cervical Cancer with Fluorescence in Situ Hybridization and Its Clinical Significance
- VernacularTitle:荧光原位杂交技术检测宫颈上皮内瘤变及宫颈癌中TERC基因的扩增及临床意义
- Author:
Wei LIU
;
Lijun SUN
- Publication Type:Journal Article
- Keywords:
Cervical cancer;
Cervical intraepithelial neoplasia;
Telomerase RNA component gene;
Fluo rescence in situ hybridization
- From:
Journal of Practical Obstetrics and Gynecology
2010;26(2):124-127,插1
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the amplification of the telomerase RNA component (TERC) gene in cervical cancer and cervical intraepithelial neoplasia (CIN) using dual-color interphase fluorescence in situ hybridization (FISH) and its significance in screening of cervical lesion. Methods:Cervical cast-off cell specimens were screened from 120 outpatients with cervical lesion, including normal cell from liquid based cytology (20 cases), CIN Ⅰ , Ⅱ , Ⅲ and cervical cancer cell from liquid based cytology (each of 25 cases). The amplification of TERC gene in cervical cast-off cells was detected by dual-color interphase FISH. The results of normal samples were used to set up the threshold. Results:①The percentages of abnormal cells in CIN Ⅰ , Ⅱ , Ⅲ and cervical cancer were significantly higher than threshold value ( P<0.05), and the percentage of abnormal cells was increased with the serious degree of pathological grade (P<0.01) ; ②The percentagesof 2:3,2:4,2:5 and great than or equal to 4:4 types in CIN Ⅰ , Ⅱ , Ⅲ and cervical cancer were significantdifferences (all P<0.01). The percentages of 2:4,2:5 and great than or equal to 4:4 types in cervical cancer were significant higher than that in CIN Ⅰ (P<0.001) while the percentage of 2:3 type was significant lower than that in it (P<0.001);③The percentage of abnormal cells was increased with the serious degree of cytological grade (P<0.01) in different cytological grades. The percentages of 2:3,2:5 and great than or equal to 4:4 types in atypical squamous cell of undetermined significance (ASCUS), low-grade squamous intraepithe-lial lesions (LSIL) and high-grade squamous intraepithelial lesions (HSIL) were significant differences (all P <0.01), and the percentages of 2:5 and great than or equal to 4:4 types in HSIL were significant higher than that in ASCUS( P <0.01) while the percentage of 2:3 type was significant lower than that in it ( P <0.01);④The detection rates of LSIL and HSIL with cytological examination in low grade and high grade CIN were 40% (10/25) and 62% (31/50) respectively, which were significant lower than the detection rates of FISH which was 100%(P<0.05).Conclusions:There is an abnormal amplification of TERC gene in CIN Ⅰ , Ⅱ , Ⅲ and cervical cancer, and its copy numbers are increased with the serious degree of pathological and cytological grades. Detection of amplification of TERC gene in cervical cast-off cells with FISH has a certain value for screening cervival lesion and prediction of lesion progression.
