Document Detail


Homeoviscous adaptation under pressure: the pressure dependence of membrane order in brain myelin membranes of deep-sea fish.
MedLine Citation:
PMID:  1543716     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Steady-state and time-resolved anistropy of 1,6-diphenyl-1,3,5-hexatriene (DPH) fluorescence have been used to compare the hydrocarbon order of brain myelin membranes from a shallow water (plaice) and two deep-sea fish species (Coryphenoides rupestris and Coryphenoides armatus). At atmospheric pressure the deep sea fish displayed lower steady-state anisotropies than shallow water species although the pressure dependence of anisotropy was similar in all species. Time-resolved measurements allowed the separate determination of the rate of probe motion from the amplitude of that motion. Anisotropy decays were analysed in terms of two correlation times and a constant (r infinity). The r infinity and mean value of P2 order parameter for all species increased with pressure, the graphs for deep-sea species being translated to higher pressures relative to shallow-water species. The resulting pressure coefficients for C. armatus was distinctly less than for the two shallower species. These time-resolved studies show that the interspecific differences provide for similar order parameters in all three species when corrected to their respective habitat conditions of pressure and temperature. This indicates that myelin order is highly conserved despite the profound ordering effects of high hydrostatic pressure.
Authors:
M K Behan; A G Macdonald; G R Jones; A R Cossins
Related Documents :
20556116 - Pressure sensor using optical fibers.
11421796 - Cyclopentannulation of 3-alkylindoles: a synthesis of a tetracyclic subunit of the kops...
15268316 - Conformation of p-terphenyl under hydrostatic pressure.
17742966 - Pressure-induced enhancement of tc above 150 k in hg-1223.
3729076 - Investigation of the venous hemodynamics of the lower limb by venous pressure models.
1796916 - Cardiovascular effects of the new dihydropyridine derivative elgodipine.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  1103     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1992 Jan 
Date Detail:
Created Date:  1992-04-14     Completed Date:  1992-04-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  317-23     Citation Subset:  IM    
Affiliation:
Department of Environmental and Evolutionary Biology, University of Liverpool, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological*
Animals
Brain / physiology*
Brain Chemistry
Cell Membrane / chemistry*,  physiology
Fishes
Fluorescence Polarization
Hydrostatic Pressure
Myelin Sheath / chemistry*,  physiology
Viscosity

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


Previous Document:  Phospholipid asymmetry during erythrocyte deformation: maintenance of the unit membrane.
Next Document:  The effect of aging and acetyl-L-carnitine on the activity of the phosphate carrier and on the phosp...