Linked Life Data

3125489

Source:http://linkedlifedata.com/resource/pubmed/id/3125489

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1988-4-5
pubmed:abstractText
The dorsal cochlear nucleus is a highly organized nucleus in the auditory system in which the ramifications of depletion of specific cell types during development can be studied. Granule cells, small interneurons that are located in all layers of the DCN in the adult hamster, proliferate postnatally and are, therefore, potentially vulnerable to anti-mitotic agents that are administered after birth. The present experiments describe the effects of alpha-difluoromethylornithine, a drug that inhibits proliferation of cerebellar granule cells, on the granule cells in the dorsal cochlear nucleus. As in the cerebellum, the density of granule cells in the dorsal cochlear nucleus is reduced after alpha-difluoromethylornithine treatment. In hamsters treated with alpha-difluoromethylornithine (200 or 500 mg/kg subcutaneously (s.c.), twice daily on postnatal days 4-14), the numerical density of granule cells was reduced in the superficial dorsal cochlear nucleus at 15 days; by 40 days this effect was also apparent in the deep layer, suggesting that cells located superficially that would have migrated into the deep dorsal cochlear nucleus had either failed to develop or did not arrive at their final location. This evidence suggests that the cells normally migrate down from the superficial proliferative zone into the deeper layers. In the drug-treated animals, a layer of mixed granule cells and fusiform cells was thinner than in controls probably due to the reduction in interspersed granule cells since the number of fusiform cells was unaffected. There was also a dose-dependent effect on cell growth; fusiform cells were affected at both doses, while giant cells were only affected at the highest dose. Granule cells form a major input to the fusiform cells and their depletion may account for some of the effects on fusiform cell growth. There could also be additional direct actions of alpha-difluoromethylornithine on this population.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0306-4522
pubmed:author
pubmed:issnType
Print
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1123-32
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Impaired morphological development of the dorsal cochlear nucleus in hamsters treated postnatally with alpha-difluoromethylornithine.
pubmed:affiliation
Department of Anatomy, Duke University Medical Center, Durham, NC 27710.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.