Linked Life Data

1656038

Source:http://linkedlifedata.com/resource/pubmed/id/1656038

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-11-4
pubmed:abstractText
The sodium dependence of recovery of cytoplasmic pH (pHi) after an acid load was studied in platelets from 15 patients with untreated essential hypertension (mean arterial pressure 117 +/- 2.3 mmHg, mean +/- SE) and in 15 normotensive controls (mean arterial pressure 90 +/- 2.2 mmHg). Proton flux was measured in gel-filtered platelets loaded with pH sensitive fluorescent indicator. Sodium dependent proton efflux was prevented by 5 (N,N hexamethylene) amiloride, a potent inhibitor of sodium-proton exchange. The relationship between initial rate of proton efflux and extracellular sodium concentration obeyed Michaelis-Menten kinetics. The maximum initial rate of proton efflux was similar in hypertensive and normotensive subjects (1.93 +/- 0.35 mmol H+1/sec, mean +/- SE, and 1.88 +/- 0.26 mmol H+l/sec respectively). The Michaelis-Menten constant (the sodium concentration at which the initial rate of proton efflux is half maximal) was also similar in the two groups: 75.7 +/- 13.9 mmol/l and 8.15 +/- 10.6 mmol/l respectively. There was no significant correlation between either of these parameters and arterial blood pressure.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0950-9240
pubmed:author
pubmed:issnType
Print
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
161-5
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Sodium dependence of sodium-proton exchange in platelets from patients with essential hypertension.
pubmed:affiliation
Department of Clinical Pharmacology, United Medical School, Guy's Hospital, London, UK.
pubmed:publicationType
Journal Article