Linked Life Data

3629603

Source:http://linkedlifedata.com/resource/pubmed/id/3629603

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-10-16
pubmed:abstractText
Ultrastructural and biochemical studies were conducted to evaluate the effects of bismuth, a potentially toxic group V trace metal, on organelle structure and heme biosynthetic parameters in rat liver and kidney cells. Bismuth subnitrate (BiONO3) was administered subcutaneously to male rats in 0, 20, 40, or 80 mg/kg doses 16 hr prior to euthanasia. Electron microscopy revealed swollen mitochondria and distortion of mitochondrial inner membranes in liver and renal proximal tubule cells at 40 and 80 mg/kg dose levels. In liver, dose-related decreases were observed in the activities of the mitochondrial enzymes, delta-aminolevulinic acid (ALA) synthetase and heme synthetase, and of the cytoplasmic enzyme, ALA dehydratase, to 51, 48, and 35% of levels seen in untreated controls, respectively. In kidney, ALA synthetase and ALA dehydratase, but not heme synthetase, were depressed in vivo to 32 and 20% of control, respectively. Studies in vitro conducted for 1-hr periods with Bi concentrations at 0, 0.1, 0.2, or 0.4 mM in reaction mixtures revealed that the direct action of the metal on membranal enzymes only partially accounts for the impairment of the activity of membranal enzymes. These studies demonstrate that the initial acute effects of bismuth in liver and kidney cells include distortion of mitochondrial membranes and direct inhibition of specific heme pathway enzymes. Both effects contribute to compromise of membrane-associated enzymatic functions. These findings are comparable to those previously reported of other trace metals with known toxicologic potential and may represent early events in bismuth-induced cell injury.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0041-008X
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
90
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
274-83
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Alteration of mitochondrial structure and heme biosynthetic parameters in liver and kidney cells by bismuth.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.