Linked Life Data

3031166

Source:http://linkedlifedata.com/resource/pubmed/id/3031166

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1987-5-12
pubmed:abstractText
Superoxide production by stimulated phagocytes is commonly measured by reduction of ferricytochrome C, with specificity of the assay assumed if the reaction is inhibited by superoxide dismutase (SOD). Most preparations of ferricytochrome C contain a small proportion in the reduced (ferro) form, and this is also formed by the reaction of ferricytochrome C with superoxide. The generation of other reactive oxygen intermediates, such as hydrogen peroxide or hydroxyl radical, could cause oxidation of ferrocytochrome C and consequent underestimation of superoxide production. In support of this, it has been demonstrated that exogenous catalase enhanced the reduction of ferricytochrome C by phorbol myristate acetate (PMA)-stimulated human monocytes. Control experiments confirmed that this was due to enhanced detection rather than increased production of superoxide. In addition, SOD was found to promote oxidation of ferrocytochrome C by PMA-stimulated human monocytes, but this was also inhibited by catalase. These effects of catalase and SOD on ferricytochrome C reduction/ferrocytochrome C oxidation were also demonstrated when superoxide was produced independently of monocytes by a xanthine and xanthine oxidase generating system. It is concluded that the assay of superoxide, using 'SOD inhibitable' reduction of ferricytochrome C, underestimates superoxide production.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0022-1759
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
98
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
63-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Reduction of ferricytochrome C may underestimate superoxide production by monocytes.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't