Linked Life Data

24346

Source:http://linkedlifedata.com/resource/pubmed/id/24346

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1978-4-26
pubmed:abstractText
Gastric mucosas from newborn pigs (0--20 days) and rabbits (0--20 days) were used for in vitro investigation of active Na+ transport during resting (no HCl secretion) conditions. As measured with 22Na+, these tissues actively absorb Na+ from the mucosal-to serosal (m-t-s) bathing solution during both open-circuit and short-circuit current (Is) conditions. In the nonsecreting state, net Na+ transport accounts for 40--60% of Isc. The remaining current is provided by net s-to-m flux of Cl-. Amiloride (2-5 X 10(-5) M) in the mucosal solution abolishes this active Na+ transport by inhibiting m-to-s fluxes of Na+ (JNams). In vivo-in vitro experiments showed that active Na+ transport is a normal function of the resting mammalian stomach. Decreasing pH of the mucosal solution below pH 5 reversibly causes decreased current-generating capability of the tissue. Pretreatment of the tissue with amiloride abolishes this pH effect. The implication is that the low pH affects the Na+-entry step into cells. "Titration curves" of current vs. pH had an apparent pK approximately 4.0. Ouabain and K+-free solutions both cause decreases in active Na+ and Cl- current. Calculations indicate that a shunt may account for only a small (less than 30%) percentage of total transepithelial conductance.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
234
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
E228-35
pubmed:dateRevised
2009-10-27
pubmed:meshHeading
pubmed:year
1978
pubmed:articleTitle
Na+ transport by mammalian stomach.
pubmed:publicationType
Journal Article, Comparative Study, In Vitro, Research Support, U.S. Gov't, P.H.S.