EET agonist prevents adiposity and vascular dysfunction in rats fed a high fat diet via a decrease in Bach 1 and an increase in HO-1 levels

Komal Sodhi, Nitin Puri, Kazuyoshi Inoue, J R Falck, Michal L. Schwartzman, Nader G. Abraham

Research output: Contribution to journalArticle

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Abstract

Recent reports have shown interplay between EETs (epoxides) and the heme oxygenase (HO) system in attenuating adipogenesis in cell culture models; prompting an examination of the effectiveness of EET agonist on obesity and associated cardio-metabolic dysfunction. Patho-physiological effects of an EET agonist (NUDSA) were contrasted in the absence and in the presence of stannous mesoporphyrin (an HO inhibitor) in SD rats fed a high fat (58%, HF) for 16 weeks. Animals on HF diet exhibited enhanced oxidative stress, increased levels of inflammatory cytokines and decreased levels of adiponectin along with reduced vascular and adipose tissue levels of EETs, HO-1; as compared to control rats (11% dietary fat). Treatment with NUDSA not only reversed serum adiponectin and vascular and adipose tissue levels of EETs and HO-1, but also, decreased blood pressure, subcutaneous and visceral fat content and serum TNFα and IL-6 levels in rats on HF diet. Aortic endothelial function, peNOS expression and adipose tissue markers of energy homeostasis i.e. pAMPK, Sirt1 and FAS, impaired in rats fed a HF diet, were restored in animals treated with this EET agonist. That NUDSA enhanced HO-1 expression, was accompanied by increase in p-GSK-3β and pAKT levels along with attenuation of adipose tissue levels of Bach 1 - the transcriptional suppresser of HO-1 expression. Prevention of these beneficial effects of NUDSA, in animals on HF diet and concurrently exposed to NUDSA and SnMP, supports the role of EET-HO interaction in mediating such effects. Taken together, our findings suggest that the EETs stimulate HO-1 expression via suppression of Bach 1 and interplay of these two systems affords vascular and metabolic protection in diet induced obesity.

Original languageEnglish (US)
Pages (from-to)133-142
Number of pages10
JournalProstaglandins and Other Lipid Mediators
Volume98
Issue number3-4
DOIs
StatePublished - Aug 2012

Fingerprint

Heme Oxygenase-1
Adiposity
High Fat Diet
Nutrition
Blood Vessels
Rats
Heme Oxygenase (Decyclizing)
Fats
Adipose Tissue
Diet
Tissue
Animals
Adiponectin
Obesity
Rat control
Glycogen Synthase Kinase 3
Adipogenesis
Oxidative stress
Intra-Abdominal Fat
Subcutaneous Fat

Keywords

  • Adiponectin
  • Cytochrome P450
  • HO-1
  • Metabolic dysfunction
  • Obesity

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Pharmacology
  • Cell Biology

Cite this

EET agonist prevents adiposity and vascular dysfunction in rats fed a high fat diet via a decrease in Bach 1 and an increase in HO-1 levels. / Sodhi, Komal; Puri, Nitin; Inoue, Kazuyoshi; Falck, J R; Schwartzman, Michal L.; Abraham, Nader G.

In: Prostaglandins and Other Lipid Mediators, Vol. 98, No. 3-4, 08.2012, p. 133-142.

Research output: Contribution to journalArticle

Sodhi, Komal ; Puri, Nitin ; Inoue, Kazuyoshi ; Falck, J R ; Schwartzman, Michal L. ; Abraham, Nader G. / EET agonist prevents adiposity and vascular dysfunction in rats fed a high fat diet via a decrease in Bach 1 and an increase in HO-1 levels. In: Prostaglandins and Other Lipid Mediators. 2012 ; Vol. 98, No. 3-4. pp. 133-142.
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