Amplification of the epidermal growth factor receptor in astrocytic tumours by chromogenic in situ hybridization: association with clinicopathological features and patient survival
| Autor: | Sally, Järvelä, S, Järvellä, H, Helin, J, Haapasalo, Timo, Järvelä, T, Järvellä, T T, Junttila, K, Elenius, M, Tanner, H, Haapasalo, J, Isola |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male Histology Adolescent Protein Array Analysis Chromogenic in situ hybridization Apoptosis Astrocytoma Biology Pathology and Forensic Medicine Epidermal growth factor Physiology (medical) Glioma medicine Humans EGFR Gene Amplification RNA Messenger Epidermal growth factor receptor Child CISH In Situ Hybridization Aged Aged 80 and over Tissue microarray Brain Neoplasms Reverse Transcriptase Polymerase Chain Reaction Age Factors Gene Amplification Middle Aged medicine.disease Immunohistochemistry Survival Analysis ErbB Receptors Survival Rate Chromogenic Compounds Neurology Child Preschool Cancer research biology.protein Female Neurology (clinical) Tumor Suppressor Protein p53 |
| Zdroj: | Neuropathology and Applied Neurobiology. 32:441-450 |
| ISSN: | 1365-2990 0305-1846 |
| DOI: | 10.1111/j.1365-2990.2006.00758.x |
| Popis: | Chromogenic in situ hybridization (CISH) was used to detect amplification of the epidermal growth factor receptor (EGFR) gene in tissue microarrays of tumours derived from 287 patients with grade II-IV diffuse astrocytomas. Amplification was found in 32% of the tumours with a highly significant association with histological grade (4% in grade II, 21% in grade III and 39% in grade IV; P < 0.001). Amplification of the EGFR gene was more common in primary than in secondary glioblastomas (41%vs. 16%, P = 0.033). Overexpression of EGFR mRNA and protein (wild-type and vIII variant) was found to correlate with EGFR gene amplification (P = 0.028, P = 0.035 and P = 0.014 respectively), but wild-type EGFR protein was also frequently overexpressed in tumours without EGFR gene amplification. Patients with older age (P < 0.001) and tumours with lack of p53 overexpression (P = 0.03) and higher apoptosis rate (P < 0.001) had significantly more EGFR gene amplifications than their counterparts. No such correlation with apoptosis was found in glioblastomas. The survival of patients with EGFR gene-amplified grade III tumours was significantly shorter than in those with grade III non-amplified tumours (P = 0.03). No such difference was noted in glioblastomas (grade IV tumours). Our data verify the central role of EGFR in the pathobiology of astrocytic tumours, and highlight the advantages of CISH as a simple and practical assay to screen for EGFR gene amplification in astrocytic tumours. |
| Databáze: | OpenAIRE |
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