title: The Non-Genomic Effects of the PPARβγ Agonist GW0742 on Streptozotocin Treated Rat Aorta.
abstract: The ubiquitous nuclear receptor PPARβ/δ is increasingly being studied in regards to numerous diseases including diabetes following on the finding that PPARβ/δ agonist GW0742 controls Type 1 Diabetes in rats. Studies have shown that GW0742 has off target, non- PPARβ/δ effects in the cell although there are some key questions that remain to be addressed in respect to the significance of this control on vascular tone.
  
  
  
  Using isometric organ baths, rat aorta rings were exposed to ROCK inhibitors and the changes in contraction and dilation measured.
  
  
  
  Our data shows that the PPARβ/δ agonist GW0742 (10-7M) inhibits contractile responses to U46619 and phenylephrine, and that these responses are similar in normal and Streptozotocin (STZ) diabetic rat aorta. ROCK inhibitors Fasudil and Y27632 significantly reduced GW0742 mediated dilation of naïve rat aorta, but Fasudil had no effect on GW0742 dilation in STZ diabetic rat aorta. In contrast, STZ diabetic rat aorta pre-contracted with high [K+] Krebs lacked a dilatory response to GW0742, which taken together indicates that the mechanism of action of GW0742 mediated dilation changes in the diabetic state compared to non-diabetic state.
  
  
  
  This is the first direct evidence demonstrating the non- PPARβ/δ effect of GW0742 on contraction is irrespective to the diabetic state, and that GW0742 has the potential to induce vasodilation via multiple off-target mechanisms.
authors.affiliation: School of Life and Medical Sciences, Hertfordshire University, Hatfield, AL10 9AB, United Kingdom.
authors.forename: Noelia
authors.initials: N
authors.lastname: Perez-Diaz
authors.affiliation: School of Life and Medical Sciences, Hertfordshire University, Hatfield, AL10 9AB, United Kingdom.
authors.forename: Igor
authors.initials: I
authors.lastname: Pushkarsky
authors.affiliation: School of Life and Medical Sciences, Hertfordshire University, Hatfield, AL10 9AB, United Kingdom.
authors.forename: Nadia
authors.initials: N
authors.lastname: Oweis
authors.affiliation: School of Life and Medical Sciences, Hertfordshire University, Hatfield, AL10 9AB, United Kingdom.
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Lione
authors.affiliation: School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, BN2 4GJ, United Kingdom.
authors.forename: Louise S
authors.initials: LS
authors.lastname: Mackenzie
mesh_terms: D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid / Q000494:pharmacology; D000818:Animals; D001011:Aorta / Q000187:drug effects* / Q000503:physiopathology; D003921:Diabetes Mellitus, Experimental / Q000473:pathology / Q000503:physiopathology; D016678:Genome; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D047495:PPAR gamma / Q000819:agonists*; D048068:PPAR-beta / Q000819:agonists*; D010656:Phenylephrine / Q000494:pharmacology; D047428:Protein Kinase Inhibitors / Q000494:pharmacology; D017208:Rats, Wistar; D013311:Streptozocin; D013844:Thiazoles / Q000494:pharmacology*; D014664:Vasodilation / Q000187:drug effects; D054460:rho-Associated Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D010636:Phenols; D013438:Sulfhydryl Compounds
chemical_list: D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; D047495:PPAR gamma; D048068:PPAR-beta; D010656:Phenylephrine; D047428:Protein Kinase Inhibitors; D013311:Streptozocin; D013844:Thiazoles; D054460:rho-Associated Kinases; C479979:(4-(((2-(3-fluoro-4-(trifluoromethyl)phenyl)-4-methyl-1,3-thiazol-5-yl)methyl)sulfanyl)-2-methylphenoxy)acetic acid; D010636:Phenols; D013438:Sulfhydryl Compounds
keywords: Artery; Non-Genomic Effects; PPAR; ROCK; Rat Arohta.; ST2; Vasodilation; diabetes