Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
6
|
pubmed:dateCreated |
1990-3-29
|
pubmed:abstractText |
The effects of heat shock on cell cycling in the mammalian neuroectoderm were determined by applying heat shocks to cultured rat embryos at the neural plate stage, as part of a study on the teratogenic effects of heat shock on neural development. The heat shocks had been characterized previously (Walsh et al.: Teratology 36:181-191, 1987) with respect to their effects on the gross morphological development of the rat embryos. The effects on cell cycling were observed in DNA histograms of neural plate cells recorded in a flow cytometer after staining with DAPI. The mild heat shock (42 degrees C for 10 min) arrested cells at entry to S phase. The teratogenic heat shock (43 degrees C for 7.5 min) arrested cells at entry to S phase also but for a longer time and inhibited cycling through S phase. After each arrest, a synchronized peak of cells later entered S phase and progressed through the cycle. The induced-thermotolerance heat shock, which was the mild heat shock followed after an interval by the teratogenic heat shock, showed that pre-treatment with the mild heat shock reduced the magnitude of the response to the teratogenic heat shock. The cell-cycle inhibitor ICRF 159 showed the effects on cycling rates of the heat-shock treatments. The arrest of cells at entry to S phase by heat shock may function to prevent cells entering DNA synthesis under non-optimal conditions. We report estimates of proportions of non-proliferative cells in the neural plate of the rat embryos.
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical | |
pubmed:status |
MEDLINE
|
pubmed:month |
Dec
|
pubmed:issn |
0040-3709
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
40
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
583-92
|
pubmed:dateRevised |
2008-11-21
|
pubmed:meshHeading |
pubmed-meshheading:2623645-Animals,
pubmed-meshheading:2623645-Cell Cycle,
pubmed-meshheading:2623645-Flow Cytometry,
pubmed-meshheading:2623645-Hot Temperature,
pubmed-meshheading:2623645-Interphase,
pubmed-meshheading:2623645-Nervous System,
pubmed-meshheading:2623645-Organ Culture Techniques,
pubmed-meshheading:2623645-Rats,
pubmed-meshheading:2623645-Rats, Inbred Strains,
pubmed-meshheading:2623645-Razoxane
|
pubmed:year |
1989
|
pubmed:articleTitle |
Heat shock affects cell cycling in the neural plate of cultured rat embryos: a flow cytometric study.
|
pubmed:affiliation |
Veterinary Clinical Sciences, University of Sydney, NSW, Australia.
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|