Investigation of the Bcl-2 and C-myc Expression in Relationship to the Ki-67 Labelling Index in Cervical Intraepithelial Neoplasia
| Autor: | Athanassios Dellas, Joachim Torhorst, Wolfgang Holzgreve, Elisabeth Schultheiss, Fred Gudat, Martin Oberholzer |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Pathology
medicine.medical_specialty Uterine Cervical Neoplasms medicine.disease_cause Cervical intraepithelial neoplasia Pathology and Forensic Medicine Proto-Oncogene Proteins c-myc medicine Humans Papillomaviridae Intraepithelial neoplasia biology Papillomavirus Infections virus diseases Obstetrics and Gynecology Uterine Cervical Dysplasia medicine.disease Immunohistochemistry female genital diseases and pregnancy complications Epithelium Tumor Virus Infections Ki-67 Antigen medicine.anatomical_structure Proto-Oncogene Proteins c-bcl-2 Ki-67 biology.protein Neoplastic cell Female Carcinogenesis Immunostaining |
| Zdroj: | International Journal of Gynecological Pathology. 16:212-218 |
| ISSN: | 0277-1691 |
| DOI: | 10.1097/00004347-199707000-00004 |
| Popis: | This is the investigation of the relationship between the neoplastic cell proliferation and the expression of bcl-2 and c-myc in human papillomavirus (HPV)-negative and HPV-positive cervical intraepithelial neoplasms (CIN). The expression of bcl-2 and c-myc was studied using quantitative immunohistochemistry in 20 specimens of normal cervical squamous epithelium and 73 specimens of CIN. To analyze the neoplastic cell proliferation rate, the Ki-67 labelling index was determined; the latter was significantly different between normal epithelium and various grades of CIN (p > 0.0001). The highest proliferation rate was found in high-grade CIN. In precancerous lesions, we found the number of bcl-2 positive cells lower than in normal epithelium, but with a significant difference between low-grade and high-grade CIN (p > 0.0001). The highest percentage of bcl-2 positive neoplastic cells was found in high-grade CIN. C-myc was rarely expressed in normal epithelium. Similar to the Ki-67 labelling index, c-myc immunostaining correlated with the histological grade of CIN, with the highest percentage of c-myc positive nuclei occurring in high-grade CIN (p > 0.0001). In contrast to bcl-2 immunoreactivity, the c-myc significantly was more expressed in high-risk HPV-positive than in HPV-negative lesions. The c-myc expression in CIN is closely related to the neoplastic cell proliferation rate. With progression of intraepithelial neoplasia, bcl-2 production in neoplastic cells increases with high co-expression of c-myc. |
| Databáze: | OpenAIRE |
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