Abstract:
:Extracts of skeletal muscle contain chromatographically distinct molecules that enhance the cholinergic development of cultured embryonic rat spinal cord neurons. We have recently purified a 20-22 kilodalton anionic polypeptide choline acetyltransferase (ChAT) development factor (CDF) from rat skeletal muscle extracts that stimulates the development of ChAT activity in rat spinal cord cultures. The maximum increase in the level of ChAT activity achieved by this factor, however, is less than that achieved by the addition of the crude extract. We now show that muscle extract also contains mitogenic activity that is immunologically related to basic fibroblast growth factor (bFGF) and also that recombinant bFGF stimulates ChAT development in rat spinal cord cultures. bFGF, however, differs from CDF in its physiochemical, chromatographic, and immunological properties and by its action on nonneuronal cells. Individually, CDF and bFGF each enhance the level of ChAT activity in rat spinal cord cultures two- to threefold after 2 days of treatment. However, their combined actions result in a five- to sixfold enhancement of ChAT activity, suggesting that they are affecting cholinergic development through different means. The demonstration that extracts of rat skeletal muscle contain two biochemically and immunologically distinct polypeptides, with additive effects on cultured embryonic spinal cord neurons, provides additional evidence for the involvement of multiple target-derived neurotrophic factors in the regulation of cholinergic development.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
McManaman J,Crawford F,Clark R,Richker J,Fuller Fdoi
10.1111/j.1471-4159.1989.tb09241.xsubject
Has Abstractpub_date
1989-12-01 00:00:00pages
1763-71issue
6eissn
0022-3042issn
1471-4159journal_volume
53pub_type
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journal_title:Journal of neurochemistry
pub_type: 杂志文章
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更新日期:1985-05-01 00:00:00
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