Article: article from journal or magazin.
Localisation of EGF-receptor mRNA in the nucleus of A431 cells by light microscopy.
Cell Biology International
We have localized the mRNA of the epidermal growth factor receptor (EGF-receptor) in nuclei of A431 cells by non-radioactive in situ hybridization at the light microscopical level using digoxigenin-labelled DNA probes. Both formaldehyde and glutaraldehyde fixations were tested before the hybridization was performed. Glutaraldehyde, compared with formaldehyde fixation, gives a less diffuse hybridization signal, which is easier to localize. Therefore, glutaraldehyde was used as a fixative in the hybridization experiments. It is demonstrated that the mRNA of the EGF-receptor is present in restricted domains mainly located around the nucleolus. This location of the EGF-receptor mRNA was unaltered after extraction of chromatin. Therefore it is concluded that the messenger RNA of the EGF-receptor is attached to the nuclear matrix. A possible biological role for the location of mRNA of the EGF-receptor around the nucleolus is discussed.
Animals, Carcinoma, Squamous Cell, Cell Nucleolus/chemistry, Cell Nucleolus/ultrastructure, Cell Nucleus/chemistry, Cell Nucleus/ultrastructure, DNA Probes, DNA, Neoplasm/analysis, DNA, Neoplasm/genetics, Formaldehyde/pharmacology, Glutaral/pharmacology, Humans, In Situ Hybridization, RNA, Messenger/analysis, RNA, Messenger/genetics, Receptor, Epidermal Growth Factor/chemistry, Tumor Cells, Cultured/chemistry, Tumor Cells, Cultured/ultrastructure
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