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- W1969613932 abstract "Injury to rat brain induces a 3-10-fold increase in the activity of factors capable of stimulating astrocyte DNA synthesis and cell division in vitro. Maximum mitogenic activity was reached 10-15 days post-lesion in both the tissue surrounding the wound and in the gelfoam filling the wound cavity. Factors capable of transforming the astrocyte morphology from polygonal-flat to fibrous-like (morphogens) could also be observed in brain tissue and showed increased activity beginning at 10 days postlesion. On the other hand, morphogenic activity was very low or absent in gelfoam extracts until 15 days postlesion. Both mitogenic and morphogenic factors were nondiffusible and were partly temperature and trypsin sensitive, i.e. they had the properties of protein-like substances, but seemed different from both epidermal and fibroblast growth factors. As judged by their filtration behavior on Amicon membranes, the molecular weight of mitogens and morphogens ranged from lower than 30,000 to greater than 100,000. Inhibitors of both mitogenic and morphogenic activities with molecular weight lower than 30,000 seemed to be also present in the brain extracts. The factors described here can account for the processes of astrocytosis and astrogliosis observed in vivo in response to CNS injury." @default.
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- W1969613932 date "1985-09-01" @default.
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- W1969613932 title "The control of glial populations in brain: Changes in astrocyte mitogenic and morphogenic factors in response to injury" @default.
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- W1969613932 doi "https://doi.org/10.1016/0006-8993(85)90750-4" @default.
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