丹参酮ⅡA抗宫颈癌鳞癌细胞增殖效应及其雌激素受体亚型介导机制的研究

目的观察丹参酮ⅡA对宫颈癌鳞癌Siha细胞增殖的影响,探讨其作用机制。方法不同浓度丹参酮ⅡA作用人宫颈癌鳞癌Siha细胞,MTT法和流式细胞术测定Siha细胞增殖速率和增殖周期分布,Western blot测定Siha细胞磷酸化细胞外信号调节激酶(p-ERK)、细胞周期蛋白(Cyclin)D表达。结果 1×10-5、5×10-6、1×10-6、5×10-7 mol/L丹参酮ⅡA显著抑制宫颈癌鳞癌Siha细胞增殖,该抑制作用可被雌激素受体(ER)α拮抗剂MPP增强、可被ERβ拮抗剂PHTPP减弱;1×10-5、5×10-6、1×10-6 mol/L丹参酮ⅡA干预后Siha细胞增殖指数显著下降;1×10-5、5×10-6、1×10-6、5×10-7 mol/L丹参酮ⅡA干预后Siha细胞p-ERK、Cyclin D蛋白表达水平显著降低。结论丹参酮ⅡA抑制宫颈癌鳞癌Siha细胞增殖是通过靶细胞ER途径实现的,并通过降低p-ERK、Cyclin D表达量发挥抗增殖作用。

研究CAl25及SCC-Ag在预测中晚期宫颈鳞癌治疗后复发转移的作用

目的探讨通过检测鳞状上皮癌抗原(SCC-Ag)及肿瘤相关糖类抗原CAl25在中晚期宫颈鳞状细胞癌治疗前后的水平,预测肿瘤复发和转移的价值。方法采集120例中晚期宫颈癌患者治疗前后的血清样本,用电化学发光免疫测定法测定SCC-Ag和CAl25水平,并进行分析。结果中晚期宫颈癌血清SCC-Ag、CAl25的水平随肿瘤分期升高而升高(P<0.05)。治疗后SCC-Ag、CAl25的水平逐渐下降。分析表明血清SCC-Ag、CAl25水平在治疗后下降至2.0 ng/mL和35 U/mL以下,其复发转移率明显下降,差异有统计学意义(P<0.01)。结论治疗后SCC-Ag、CAl25下降程度可以作为预测治疗后复发和转移的依据。

Relationship between Cell Proliferation and Apoptosis in Cervical Carcinoma

Objective To study the relationship between cell proliferation and apoptosis in cervical carcinoma and its clinical significance. Methods The cell proliferation and apoptosis of cervical epithelial cells in archival formalin-fixed, paraffin-embedded tissue sections of normal cervix, cervical intraepithelial neoplasms (GIN) and cervical squamous carcinoma were tested by using immunohistochemistry assay and DNA nick end-labeling technigue. The proliferation index (PI) and apoptosis index (AI) were calculated and their correlation with clinical and pathological data was analyzed.Results PI was gradually increased, but the AI and AI/PI ratio decreased from normal cervical epithelium, GIN to cervical carcinoma. There was no significant relationship among cell proliferation, apoptosis, clinical stages and pathological grades. High AI was always associated with a poor prognosis of the patients.Conclusion Cell proliferation and apoptosis allow to distinguish among normal epithelium, GIN and cervical carcinoma and are useful for the assessment of the malignant potential of tumor tissues.

Expression and role of AQP1 in cervical squamous carcinoma and its precancerous lesions

Objective： To investigate the expression of aquaporin 1 in cervical squamous carcinomas （CSC） and cervical precancerous lesions, and the relationship between the tumor clinicopathological parameters, prognosis and the expression of AQP1. Methods： Immunohistochemical method （EliVision） was used to detect the expression of AQP1 in samples from 106 patients [20 with normal cervical tissue, 30 with cervical intraepithelial neoplasia （stage Ⅰ and Ⅱ） and 56 with CSC]. Survival analysis was performed by Kaplan-Meier method. Results： AQP1 protein was expressed in vascular endothelia of all samples. It showed upregulation of AQP1 expression in CSC. There was a significant difference between CSC and normal cervical tissues （P〈0.05）. AQP1 was expressed in some tumor cells and unexpressed in normal squamous epithelial cells. And APQl-expressing tumor cells were positively related to lymph node metastasis. Patients with APQl-expressing tumor cells had the lower survival rate than the ones without. Conclusion： Abnormal expression of AQP1 plays an important role in the development of CSC. Positive expression of AQP1 in tumor cells maybe enhances tumor metastasis and could be used as a marker for tumor prognosis.

Screening of premalignant and malignant cervical lesions in underdeveloped countries by using Pap smear as routine investigation in outpatient department

Objective: Papanicolou (Pap) smear screening has dramatically reduced the incidence of invasive cervical cancer worldwide. Pap smear screening is still not widely available in developing countries and therefore cannot be used as mass screening tool. This study was designed to establish the role of Pap smear as a routine investigation for females presented to gynecological department. Methods: It was a hospital based study. Patients attending with complaints including irregular vaginal bleeding, vagina discharge, dyspareunia, low backache or lower abdominal pain and primary or secondary infertility were included in the study. All these patients underwent pap smear. Results: Age of females was 25 to 60 years. Ninety females had dysplasia. Mild to moderate dysplasia was positive in 84 females. Six patients had severe dysplasia suspicious for squamous cell carcinoma (SCC) which was confirmed as invasive SCC on biopsy. All patients with mild to moderate dysplasia were regularly followed at 4 to 6 months. Thirty patients were lost during follow up. Forty had negative smear at 6 months, while fourteen having persistent dysplasia on repeated pap smears were referred for biopsies. Histopathology confirmed invasive SCC in five patients while chronic cervicitis was reported in nine patients. Only two of screened patients with high suspicion for cancer showed false negative results. Directed biopsies done in these confirmed invasive SCC. Conclusion: Pap smear is a useful, simple, non-invasive and reliable screening tool for cervical cancer. It may be practiced as a routine investigation in outpatients in developing countries, where mass screening is not available.