Numerical aberrations of chromosome 17 in interphase cell nuclei of breast carcinoma cells: lack of correlation with abnormal expression of p53, neu and nm23 protein
| Autor: | Kahsai Beraki, Peter Jebsen, Eli Ormerod, Torill Sauer, Oddvar Naess |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Microbiology (medical)
medicine.medical_specialty Receptor ErbB-2 Breast Neoplasms In situ hybridization Biology Pathology and Forensic Medicine Gene product Carcinoma medicine Biomarkers Tumor Immunology and Allergy Humans Interphase Monomeric GTP-Binding Proteins Cell Nucleus Chromosome Aberrations Cytogenetics Chromosome General Medicine NM23 Nucleoside Diphosphate Kinases medicine.disease Molecular biology Immunohistochemistry Chromosome 17 (human) Nucleoside-Diphosphate Kinase Cancer research Ploidy Tumor Suppressor Protein p53 Chromosomes Human Pair 17 Transcription Factors |
| Zdroj: | APMIS : acta pathologica, microbiologica, et immunologica Scandinavica. 106(10) |
| ISSN: | 0903-4641 |
| Popis: | The genes for p53, neu (c-erbB-2) and nm23 are all located on chromosome 17. Abnormal expression of their protein products is an important prognostic parameter. The aim of this study was to investigate if numerical aberrations of chromosome 17 are reflected in the expression of these markers. The immunohistochemical expression was analysed on histological specimens from 33 breast carcinomas. In situ hybridization (ISH) was performed on interphase cell nuclei in air-dried fine-needle aspirates from the same cases using a digoxigenin-labelled alpha-satellite probe for chromosome 17. ISH for chromosome 6, 7 and 12 was used additionally to give an estimate of ploidy. Of the carcinomas 76% were aneuploid, and numerical abnormalities of chromosome 17 were found in 34%. Abnormal p53 protein was expressed in 15% (five cases). All of these were aneuploid, but only one of them revealed aneusomy of chromosome 17. Neu overexpression was found in 18% of the tumours (six cases). Five of these were aneuploid, whereas two were aneusome for chromosome 17. Four cancers showed full (normal) expression of nm23 protein, whereas 29 had reduced expression. Reduced expression was found in 23 of 25 aneuploid tumours. Numerical aberrations of chromosome 17 were found equally in carcinomas with reduced and full nm23 protein expression. Abnormal numbers of chromosome 17 seem only to have a minor impact on these markers and are not reflected significantly in their expression. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text