RGD Reference Report - Fisetin lowers methylglyoxal dependent protein glycation and limits the complications of diabetes. - Rat Genome Database

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Fisetin lowers methylglyoxal dependent protein glycation and limits the complications of diabetes.

Authors: Maher, P  Dargusch, R  Ehren, JL  Okada, S  Sharma, K  Schubert, D 
Citation: Maher P, etal., PLoS One. 2011;6(6):e21226. doi: 10.1371/journal.pone.0021226. Epub 2011 Jun 27.
RGD ID: 7243937
Pubmed: PMID:21738623   (View Abstract at PubMed)
PMCID: PMC3124487   (View Article at PubMed Central)
DOI: DOI:10.1371/journal.pone.0021226   (Journal Full-text)

The elevated glycation of macromolecules by the reactive dicarbonyl and alpha-oxoaldehyde methylglyoxal (MG) has been associated with diabetes and its complications. We have identified a rare flavone, fisetin, which increases the level and activity of glyoxalase 1, the enzyme required for the removal of MG, as well as the synthesis of its essential co-factor, glutathione. It is shown that fisetin reduces two major complications of diabetes in Akita mice, a model of type 1 diabetes. Although fisetin had no effect on the elevation of blood sugar, it reduced kidney hypertrophy and albuminuria and maintained normal levels of locomotion in the open field test. This correlated with a reduction in proteins glycated by MG in the blood, kidney and brain of fisetin-treated animals along with an increase in glyoxalase 1 enzyme activity and an elevation in the expression of the rate-limiting enzyme for the synthesis of glutathione, a co-factor for glyoxalase 1. The expression of the receptor for advanced glycation end products (RAGE), serum amyloid A and serum C-reactive protein, markers of protein oxidation, glycation and inflammation, were also increased in diabetic Akita mice and reduced by fisetin. It is concluded that fisetin lowers the elevation of MG-protein glycation that is associated with diabetes and ameliorates multiple complications of the disease. Therefore, fisetin or a synthetic derivative may have potential therapeutic use for the treatment of diabetic complications.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
type 1 diabetes mellitus  ISOAger (Mus musculus)7243937; 7243937protein:increased expression:renal cortex (mouse)RGD 
type 1 diabetes mellitus  IEP 7243937protein:increased expression:renal cortex (mouse)RGD 

Objects Annotated

Genes (Rattus norvegicus)
Ager  (advanced glycosylation end product-specific receptor)

Genes (Mus musculus)
Ager  (advanced glycosylation end product-specific receptor)

Genes (Homo sapiens)
AGER  (advanced glycosylation end-product specific receptor)


Additional Information