Linked Life Data

531489

Source:http://linkedlifedata.com/resource/pubmed/id/531489

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
1980-4-17
pubmed:abstractText
Previous studies indicate that water and at least 2 mol NaCl are reabsorbed in the proximal tubules for each mol NaHCO3 reabsorbed. To examine the effect on cortical energy metabolism of variations in this bicarbonate-dependent sodium reabsorption, the cortical metabolic rate was examined in anaesthetized dogs by the heat production technique during continuous infusion of saline and ethacrynic acid. Sodium reabsorption was altered either by intravenous infusion of a large dose of acetazolamide (500 mg/kg body wt) or by changing plasma Pco2 during metabolic alkalosis. Acetazolamide reduced bicarbonate reabsorption by 71 +/- 2%, sodium reabsorption by 54 +/- 2% and cortical heat production by 21 +/- 3%. A rise in Pco2 to 16.4 +/- 1.3 kPa during metabolic alkalosis increased sodium reabsorption by 25 +/- 3% and cortical heat production by 14 +/- 2%. A similar elevation of plasma Pco2 during metabolic acidosis had no effect on electrolyte reabsorption or the cortical metabolic rate. A reduction in Pco2 to 2.3 +/- 0.3 kPa reduced sodium reabsorption by 40 +/- 3% and cortical heat production by 19 +/- 2%. We conclude that a rise in proximal tubular reabsorption requires energy. However, the changes in energy requirement are small, accounting for previous failures to observe significant changes in cortical energy metabolism during less extensive changes of sodium reabsorption in the proximal tubules.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0036-5513
pubmed:author
pubmed:issnType
Print
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
635-43
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1979
pubmed:articleTitle
Renal metabolic rate during changes in bicarbonate-dependent sodium reabsorption in the proximal tubules.
pubmed:publicationType
Journal Article