Linked Life Data

3261792

Source:http://linkedlifedata.com/resource/pubmed/id/3261792

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1988-10-13
pubmed:abstractText
1. In fifteen experiments, single microvessels in the exposed mesenteries of pithed frogs were perfused with Ringer solutions containing bovine serum albumin (40 mg ml-1). For each vessel, the hydraulic permeability of its walls (Lp) and effective osmotic pressure exerted across them (sigma delta pi) were determined from measurements of fluid filtration rates at two capillary pressures (Michel, Mason, Curry, Tooke & Hunter, 1974) before and at predetermined times after the tissue temperature had been raised abruptly from approximately 15 degrees C to 30-35 degrees C. Temperatures greater than 30 degrees C appear to damage the tissues of frogs acclimatized to temperatures of 5-10 degrees C. 2. In fourteen out of fifteen experiments Lp rose when the temperature was raised to 30-35 degrees C. In twelve of these experiments the increase in Lp was greater than expected from the fall in water viscosity with temperature, and was progressive. In five vessels where measurements were made 1-2 min after tissue temperature was raised, Lp increased from an initial mean value (+/- S.E.M.) of 3.76 (+/- 0.54) x 10(-3) micron s-1 cmH2O-1 to one of 8.72 (+/- 1.68) x 10(-3) micron s-1 cmH2O-1. In nine vessels where measurements were made at 10 min after tissue temperature was raised, Lp increased from an initial mean value of 4.03 (+/- 0.72) x 10(-3) micron s-1 cmH2O-1 to one of 16.9 (+/- 3.5) x 10(-3) micron s-1 cmH2O-1. Further increases in Lp were seen at 15 and 20 min. 3. The changes in the effective osmotic pressure opposing filtration, sigma delta pi, were very variable. Out of the twelve vessels which showed large changes in Lp with tissue heating, four showed no reduction in sigma delta pi after 10 min, though sigma delta pi fell in three of these vessels at 15 min. In the other eight vessels, sigma delta pi fell as Lp rose. A quantitative theory developed in this paper allowed the changes in sigma delta pi to be analysed in terms of a component across the regions of vessel wall of increased permeability (sigma H delta pi H) and a component across regions where Lp was unchanged. In six vessels sigma H delta pi H approximated to zero; in two vessels sigma H delta pi H was 6.2 and 4.5 cmH2O.(ABSTRACT TRUNCATED AT 400 WORDS)
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-1086361, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-14212850, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-14468626, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-3080341, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-3084499, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-3157795, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-3498833, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-382749, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-3872988, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-4066181, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-4548540, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-69248, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-6973022, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-6975816, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-7108783, http://linkedlifedata.com/resource/pubmed/commentcorrection/3261792-7360044
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-3751
pubmed:author
pubmed:issnType
Print
pubmed:volume
395
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
99-114
pubmed:dateRevised
2010-8-25
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Inflammatory changes in permeability and ultrastructure of single vessels in the frog mesenteric microcirculation.
pubmed:affiliation
University Laboratory of Physiology, Oxford.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't