ABSTRACT
<p><b>OBJECTIVE</b>To explore the relationship between human papillomavirus(HPV) infection and expression of human leukocyte antigen class I (HLA-I) family genes (HLA-A, B and C) in cervical cancers of Uighur women, and to investigate their effect on cervical cancer progression.</p><p><b>METHODS</b>Fresh tissue samples of 78 Uighur women with cervical squamous carcinoma, cervical intraepithelial neoplasia (CIN) or benign cervicitis were selected. HLA-A, B and C expression and HPV infection were analyzed using RT-PCR and HPV gene chips, respectively.</p><p><b>RESULTS</b>There was a tendency of increasing the total loss of HLA-A, B and C mRNA as the cervical lesions became more aggressive. Loss of HLA-I mRNA in CIN (I, II and III) and cervical squamous carcinoma was 70.0% (14/20) and 84.8% (39/46) respectively. Poorly differentiated cervical carcinomas had the highest HLA-I expression loss (90.6%). In contrast, HLA-I mRNA loss was seen in only 8% of cases of cervicitis. Moreover, it was found that high risk HPV 16 infection was strongly correlated with the loss HLA-I mRNA expression (r = 0.803, P < 0.01).</p><p><b>CONCLUSIONS</b>The loss of HLA-I gene expression is strongly correlated with HPV-16 infection, and may serve as a biomarker of cervical cancer progression in Uighur women.</p>
Subject(s)
Adult , Aged , Female , Humans , Middle Aged , Carcinoma, Squamous Cell , Ethnology , Genetics , Allergy and Immunology , Virology , Uterine Cervical Dysplasia , Ethnology , Genetics , Allergy and Immunology , Virology , China , Ethnology , HLA Antigens , Genetics , Metabolism , HLA-A Antigens , Genetics , Metabolism , HLA-B Antigens , Genetics , Metabolism , HLA-C Antigens , Genetics , Metabolism , Human papillomavirus 16 , Papillomavirus Infections , Ethnology , Genetics , Allergy and Immunology , Virology , RNA, Messenger , Metabolism , Uterine Cervical Neoplasms , Ethnology , Genetics , Allergy and Immunology , Virology , Uterine Cervicitis , Ethnology , Genetics , Allergy and Immunology , VirologyABSTRACT
Objective To study the expression of O6-methylguanine-DNA methyltransferase (MGMT) and its clinicopathological significance in thyroid cancer.Methods Immunohistochemistry was used to determine the expression of MGMT in 61 thyroid cancer tissues, 21 thyroid adenomas, 15 Hashimoto's thyroiditis, 8 nodular goiter, and 12 peri-tumor tissues. Results There was statistic difference in the expression of MGMT between the normal tissues and thyroid cancers (P＜0.05). Expression of MGMT increased from the normal tissue (16.67%, 10/12), nodular goiter (25.00%, 2/8), Hashimoto's thyroiditis (60.00%, 9/15), and thyroid adenoma (52.38%, 11/21)to thyroid cancer (60.66%, 38/61). Expression of MGMT in papillary thyroid cancer (PTC) and follicular thyroid cancer (FTC) had significant difference (P＜0.05), and the expression level of MGMT decreased with the malignancy of thyroid cancer, such as in PTC (72.22%, 26/36), and FTC (50.00%, 8/16). There was no statistic difference in MGMT expression in sex, age, and nationality (P＞0.05).Conclusion High expression of MGMT might be related to the malignancy of thyroid cancer, which may be one of the diagnosis indexes for thyroid cancer. It will be a common clinical index in diagnosingthyroid cancer since there is no difference in MGMT expression among sexes, ages, and nationalities.