Document Detail

Influence of hypothermia on cell volume and cytotoxic swelling of glial cells in vitro.
MedLine Citation:
PMID:  11450089     Owner:  NLM     Status:  MEDLINE    
In view of the increasing significance of mild hypothermia (32 degrees C) as an efficient procedure of neuroprotection, the present study was performed to examine the influence of this level of hypothermia on the volume of glial cells under physiological as well as under pathological conditions. The influence of mild (32 degrees C) and moderate (27 degrees C) hypothermia on cell volume and cell viability of C6 glioma cells was studied for 60 minutes in vitro. Cells were suspended in an incubation chamber under continuous control of temperature, pH and pO2. Cell volume was measured by an advanced Coulter system. Hypothermia itself was causing significant cell swelling in a dose-dependent manner, which could be prevented by omission of Na(+)-ions from the suspension medium, while the replacement of Cl(-)-ions failed to prevent cell swelling from hypothermia. Inhibition of the Na+/H(+)-antiporter with EIPA (5N-ethyl-n-isopropyl-amiloride, 50 microM) was significantly reducing the hypothermia induced cell swelling, indicating activation of the Na+/H(+)-antiporter. Conversely, mild or moderate hypothermia failed to prevent cell swelling from lactic acid, arachidonic acid or glutamate, i.e. agents which are mediating the development of cytotoxic brain edema in vivo in cerebral trauma, ischemia and other acute insults. The findings indicate that cerebral protection by hypothermia in vivo is most likely not attributable to an inhibition of cytotoxic brain edema. Further investigations, however, are required in vivo and in vitro to elucidate the hypothermia-induced swelling of glial cells in more detail, e.g. as to the role of the Na+/H(+)-antiporter.
E Mueller; J Wietzorrek; F Ringel; S Guretzki; A Baethmann; N Plesnila
Related Documents :
451539 - Role of nuclear size in cell growth initiation.
1336929 - Intracellular ph regulation by a na+/h+ exchanger in cultured bovine trabecular cells.
16323149 - Cell volume increase in murine mc3t3-e1 pre-osteoblasts attaching onto biocompatible ta...
3811979 - Carbonic anhydrase inhibition and cell volume regulation in necturus gallbladder.
19003339 - Hybridoma cell behaviour in continuous culture under hyperosmotic stress.
16660449 - Association of potassium and some other monovalent cations with occurrence of polyphosp...
7686949 - Phosphorylation of cd20 in cells from a hairy cell leukemia cell line. evidence for inv...
24561269 - Perfluorooctane sulfonate blocked autophagy flux and induced lysosome membrane permeabi...
22753739 - Effect of histone deacetylase inhibitors trichostatin a and valproic acid on etoposide-...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta neurochirurgica. Supplement     Volume:  76     ISSN:  0065-1419     ISO Abbreviation:  Acta Neurochir. Suppl.     Publication Date:  2000  
Date Detail:
Created Date:  2001-07-13     Completed Date:  2001-08-09     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100962752     Medline TA:  Acta Neurochir Suppl     Country:  Austria    
Other Details:
Languages:  eng     Pagination:  551-5     Citation Subset:  IM    
Institute for Surgical Research, Ludwig-Maximilians-Universität, Munich, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Brain Neoplasms
Cell Size / physiology*
Cell Survival / physiology*
Flow Cytometry*
Hypothermia, Induced*
Neuroglia / physiology*
Tumor Cells, Cultured / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The selectin superfamily: the role of selectin adhesion molecules in delayed cerebral ischaemia afte...
Next Document:  Clinical experiences with the dual-switch valve in patients with normal pressure hydrocephalus.