Nestin is a class VI intermediate filament protein expressed in the cytoplasm of stem and progenitor cells in the mammalian CNS during development. In adults, nestin is present only in a small subset of cells and tissues, including the subventricular zone of the adult mammalian brain, where neurogenesis occurs. Nestin expression has also been detected under such pathological conditions as ischemia, inflammation, and brain injury, as well as in various types of human solid tumors and their corresponding cell lines. Furthermore, nestin was recently found in the nuclei of glioblastoma, neuroblastoma, and angiosarcoma cells and it was proved to interact directly with the nuclear DNA in neuroblastoma cells. Here, we perform the first study of the intracellular distribution of nestin in cell lines derived from neurogenic tumors. Using immunodetection methods, we examined nestin expression in tumor-derived cell lines obtained from 11 patients with neuroblastoma, medulloblastoma, or glioblastoma multiforme. Besides its standard cytoplasmic localization, nestin was present in the nuclei of two neuroblastoma cell lines and one medulloblastoma cell line. Nestin was only present in the nuclei of cells with diffuse cytoplasmic staining for this protein, and the proportion of cells positive for nestin in nuclei, as well as the intensity of staining, varied. The presence of nestin in the nuclei was confirmed by both transmission electron microscopy and Western blotting. Our results indicate that the presence of nestin in the nuclei of tumor cells is not very rare, especially under in vitro conditions.

• MeSH
• buněčné jádro chemie   metabolismus   ultrastruktura   MeSH
• dítě MeSH
• fluorescenční protilátková technika MeSH
• glioblastom metabolismus   ultrastruktura   MeSH
• imunohistochemie MeSH
• kojenec MeSH
• lidé středního věku MeSH
• lidé MeSH
• meduloblastom metabolismus   ultrastruktura   MeSH
• nádorové buněčné linie MeSH
• neuroblastom metabolismus   ultrastruktura   MeSH
• předškolní dítě MeSH
• proteiny intermediálních filament analýza   metabolismus   MeSH
• proteiny nervové tkáně analýza   metabolismus   MeSH
• senioři MeSH
• transmisní elektronová mikroskopie MeSH
• western blotting MeSH
• Check Tag
• dítě MeSH
• kojenec MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• předškolní dítě MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH