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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1992-4-17
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pubmed:abstractText |
3-Deoxyglucose (3-deoxy-D-erythro-hexos-2-ulose) (3-DG) is a reactive dicarbonyl intermediate involved in the polymerization and browning of proteins by glucose in vitro. Damage to protein by formation of 3-DG in vivo is thought to be limited by enzymes which convert 3-DG to less reactive species, such as 3-deoxyfructose (3-DF). We have developed a sensitive and specific assay for measuring 3-DG and 3-DF in human urine and plasma. In this assay, 3-DG and 3-DF are reduced to 3-deoxy-hexitols (3-DH), using either NaBH4 or NaBD4, and then analyzed by selected ion monitoring gas chromatography-mass spectrometry. Based on comparative analysis of samples reduced with NaBD4 versus NaBD4, 3-DH in urine was derived exclusively (greater than 99%) from 3-DF, while 3-DG accounted for approximately 15% of 3-DH in plasma. The concentrations of 3-DH in fasting human urine and plasma were 5.3 +/- 1.5 micrograms/mg creatinine (n = 18) and 7.2 +/- 1.7 micrograms/dl (n = 18), respectively. The concentrations of 3-DG and 3-DF in plasma (n = 7) were 1.0 +/- 0.2 and 6.7 +/- 1.6 micrograms/dl, respectively. These results suggest that several milligrams of 3-DG are formed in the body per day and detoxified by reduction to 3-DF and support the role of 3-DG as an intermediate in the browning of protein via the Maillard reaction in vivo.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/3-deoxyglucosone,
http://linkedlifedata.com/resource/pubmed/chemical/3-deoxyhexulose,
http://linkedlifedata.com/resource/pubmed/chemical/Borohydrides,
http://linkedlifedata.com/resource/pubmed/chemical/Deoxyglucose,
http://linkedlifedata.com/resource/pubmed/chemical/Deuterium,
http://linkedlifedata.com/resource/pubmed/chemical/Ketoses,
http://linkedlifedata.com/resource/pubmed/chemical/Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/sodium borohydride
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pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0003-9861
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
294
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
130-7
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:1550339-Borohydrides,
pubmed-meshheading:1550339-Deoxyglucose,
pubmed-meshheading:1550339-Deuterium,
pubmed-meshheading:1550339-Gas Chromatography-Mass Spectrometry,
pubmed-meshheading:1550339-Humans,
pubmed-meshheading:1550339-Ketoses,
pubmed-meshheading:1550339-Maillard Reaction,
pubmed-meshheading:1550339-Molecular Structure,
pubmed-meshheading:1550339-Oxidation-Reduction,
pubmed-meshheading:1550339-Proteins
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pubmed:year |
1992
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pubmed:articleTitle |
Detection of 3-deoxyfructose and 3-deoxyglucosone in human urine and plasma: evidence for intermediate stages of the Maillard reaction in vivo.
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pubmed:affiliation |
Department of Chemistry, University of South Carolina, Columbia 29208.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
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