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Titolo:
KERATIN INTERMEDIATE FILAMENT EXPRESSION IN ASTROCYTIC NEOPLASMS - ANALYSIS BY IMMUNOCYTOCHEMISTRY, WESTERN-BLOT, AND NORTHERN HYBRIDIZATION
Autore:
COSGROVE MM; RICH KA; KUNIN SA; SHERROD AE; MARTIN SE;
Indirizzi:
UNIV SO CALIF,SCH MED,DEPT PATHOL LOS ANGELES CA 90033
Titolo Testata:
Modern pathology
fascicolo: 3, volume: 6, anno: 1993,
pagine: 342 - 347
SICI:
0893-3952(1993)6:3<342:KIFEIA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
EPITHELIAL MEMBRANE ANTIGEN; MONOCLONAL-ANTIBODIES; TUMOR-DIAGNOSIS; CYTOKERATIN; CELLS; IMMUNOREACTIVITY; DIFFERENTIATION; PATHOLOGY; PROTEINS; PATTERNS;
Keywords:
ASTROCYTOMA; GLIOMA; IMMUNOCYTOCHEMISTRY; IMMUNOBLOT; KERATIN; CYTOKERATIN; NORTHERN ANALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
M.M. Cosgrove et al., "KERATIN INTERMEDIATE FILAMENT EXPRESSION IN ASTROCYTIC NEOPLASMS - ANALYSIS BY IMMUNOCYTOCHEMISTRY, WESTERN-BLOT, AND NORTHERN HYBRIDIZATION", Modern pathology, 6(3), 1993, pp. 342-347

Abstract

In this study, 29 formalin-fixed, paraffin-embedded astrocytic tumorswere analyzed immunocytochemically with the antikeratin monoclonal antibodies Mak-6 and Cam 5.2 and a polyclonal antibody against glial fibrillary acidic protein (GFAP). Immunoreactivity for Mak-6 was present in 29 cases (100%) including six well-differentiated astrocytomas, nine anaplastic astrocytomas, and 14 glioblastomas multiforme. Cam 5.2 immunoreactivity was focally present in one case of GBM (4%) but was absent in the remaining 28 cases. All cases were immunoreactive with an antibody against GFAP. Cytokeratin (CK) expression was examined in extracts of four separate well-characterized astrocytoma cell lines by Western blotting with the monoclonal antibodies Mak-6, Cam 5.2, and anti-CK 18 and by Northern analysis using a cDNA probe for the human CK 18 gene. The Western blots revealed the presence of immunoreactive bands corresponding to CK numbers 14/15, 16, and 18 in extracts from all four cell lines and additional bands corresponding to CK 8 in 3/4 lines and CK 19 in 1/4 lines. Northern analysis detected CK 18 mRNA in extracts from 2/4 astrocytic cell lines. These findings demonstrate that CK immunoreactivity is frequent in astrocytic tumors and confirm through the molecular and biochemical analysis of CK 18 gene expression and ofkeratin intermediate filament proteins that the basis for CK immunoreactivity in astrocytic tumors is bona fide CK expression, not cross-reactivity with other antigens or artifact. The demonstration of CK expression by astrocytic neoplasms has important implications for pathologists involved in the diagnosis of poorly differentiated tumors.

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Documento generato il 22/01/20 alle ore 12:37:21