Journal article
Activation of NF-E2-related factor-2 reverses biochemical dysfunction of endothelial cells induced by hyperglycemia linked to vascular disease
Diabetes (New York, N.Y.), Vol.57(10), pp.2809-2817
10/01/2008
DOI: 10.2337/db06-1003
PMCID: PMC2551693
PMID: 18633117
Abstract
OBJECTIVE-Sulforaphane is an activator of transcription factor NF-E2-related factor-2 (nrf2) that regulates gene expression through the promoter antioxidant response element (ARE). Nrf2 regulates the transcription of a battery of protective and metabolic enzymes. The aim of this study was to assess whether activation of nrf2 by sulforaphane in human microvascular endothelial cells prevents metabolic dysfunction in hyperglycemia.
RESEARCH DESIGN AND METHODS-Human microvascular HMEC-1 endothelial cells were incubated in low and high glucose concentrations (5 and 30 mmol/l, respectively), and activation of nrf2 was assessed by nuclear translocation. The effects of sulforaphane on multiple pathways of biochemical dysfunction, increased reactive oxygen species (ROS) formation, hexosamine pathway, protein kinase C (PKC) pathway, and increased formation of methylglyoxal were assessed.
RESULTS-Activation of nrf2 by sulforaphane induced nuclear translocation of nrf2 and increased ARE-linked gene expression, for example, three- to fivefold increased expression of transketolase and glutathione reductase. Hyperglycemia increased the formation of ROS-an effect linked to mitochondrial dysfunction and prevented by sulforaphane. ROS formation was increased further by knockdown of nrf2 and transketolase expression. This also abolished the counteracting effect of sulforaphane, suggesting mediation by nrf2 and related increase of transketolase expression. Sulforaphane also prevented hyperglycemia-induced activation of the hexosamine and PKC pathways and prevented increased cellular accumulation and excretion of the glycating agent methylglyoxal.
CONCLUSIONS-We conclude that activation of nrf2 may prevent biochemical dysfunction and related functional responses of endothelial cells induced by hyperglycemia in which increased expression of transketolase has a pivotal role.
Details
- Title: Subtitle
- Activation of NF-E2-related factor-2 reverses biochemical dysfunction of endothelial cells induced by hyperglycemia linked to vascular disease
- Creators
- Mingzhan Xue - University Hospital CoventryQingwen Qian - University of EssexAntonysunil Adaikalakoteswari - Univ Warwick, Univ Hosp, Warwick Med Sch, Clin Sci Res Inst, Coventry CV4 7AL, W Midlands, EnglandNaila Rabbani - Univ Warwick, Univ Hosp, Warwick Med Sch, Clin Sci Res Inst, Coventry CV4 7AL, W Midlands, EnglandRoya Babaei-Jadidi - University of EssexPaul J. Thornalley - Univ Warwick, Univ Hosp, Warwick Med Sch, Clin Sci Res Inst, Coventry CV4 7AL, W Midlands, England
- Resource Type
- Journal article
- Publication Details
- Diabetes (New York, N.Y.), Vol.57(10), pp.2809-2817
- DOI
- 10.2337/db06-1003
- PMID
- 18633117
- PMCID
- PMC2551693
- NLM abbreviation
- Diabetes
- ISSN
- 0012-1797
- eISSN
- 1939-327X
- Publisher
- Amer Diabetes Assoc
- Number of pages
- 9
- Grant note
- Biotechnology and Biosciences Research Council (U.K.); UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC) BB/D006295/2 / Biotechnology and Biological Sciences Research Council; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC) BB/D006295/1 / BBSRC; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC) Wellcome Trust (U.K.); Wellcome Trust Juvenile Diabetes Research Foundation International (New York); Juvenile Diabetes Research Foundation
- Language
- English
- Date published
- 10/01/2008
- Academic Unit
- Anatomy and Cell Biology
- Record Identifier
- 9984420838602771
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