Stimulated astrocytes release high-mobility group 1 protein, an inducer of LAN-5 neuroblastoma cell differentiation - PubMed (original) (raw)
Stimulated astrocytes release high-mobility group 1 protein, an inducer of LAN-5 neuroblastoma cell differentiation
M Passalacqua et al. Neuroscience. 1998 Feb.
Abstract
Stimulated astrocytes specifically release large amounts of high-mobility group 1 protein into the extracellular medium. The identity of the released protein has been established on the basis of its biological activity on murine erythroleukaemia cells and by its immunoreactivity against a specific monoclonal antibody. High-mobility group 1 protein also plays an essential role in differentiation of LAN-5 neuroblastoma cells which, following stimulation with retinoic acid, express high-mobility group 1 protein on to the external surface of the plasma membrane. In retinoic acid-induced LAN-5 cells, high-mobility group 1 protein is not secreted but is accumulated in a membrane-bound form, particularly at the level of neurite outgrowths. These cells can also be induced to differentiate by high-mobility group 1 protein coated on the surface of the cell culture vessels. The specific function of the protein in this process is indicated by inhibition of cell differentiation by an anti-high-mobility group 1 protein antibody. The data are consistent with a role of high-mobility group 1 protein in promoting cell-cell interactions and in the development of nerve tissues.
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