title: Altered ATP-sensitive potassium channels may underscore obesity-triggered increase in blood pressure.
abstract: OBJECTIVE
  To determine whether ATP-sensitive potassium channels are altered in VSMC from arotas and mesenteric arteries of obese rat, and their association with obesity-triggered increase in blood pressure.
  
  
  METHODS
  Obesity was induced by 24 weeks of high-fat diet feeding in male Sprague-Dawley rats. Control rats were fed with standard laboratory rat chow. Blood pressure and body weight of these rats were measured every 4 weeks. At the end of 24 weeks, K(ATP) channelmediated relaxation responses in the aortas and mesenteric arteries, K(ATP) channel current, and gene expression were examined, respectively.
  
  
  RESULTS
  Blood pressure and body weight were increased in rats fed with high-fat diet. K(ATP) channelmediated relaxation responses, currents, and K(ATP) expression in VSMC of both aortas and mesenteric arteries were inhibited in these rats.
  
  
  CONCLUSIONS
  Altered ATP-sensitive potassium channels in obese rats may underscore obesity-triggered increase in blood pressure.
authors.affiliation: Department of Cardiology, The First Affiliated Hospital of Xi-an Jiaotong University School of Medicine, Xi-an 710061, China.
authors.forename: Li-hong
authors.initials: LH
authors.lastname: Fan
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Tian
authors.forename: Ai-qun
authors.initials: AQ
authors.lastname: Ma
authors.forename: Zhi
authors.initials: Z
authors.lastname: Hu
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Huo
authors.forename: Yong-xiao
authors.initials: YX
authors.lastname: Cao
mesh_terms: D000818:Animals; D000959:Antihypertensive Agents / Q000627:therapeutic use; D001013:Aorta, Thoracic / Q000187:drug effects; D001794:Blood Pressure / Q000502:physiology*; D001835:Body Weight / Q000187:drug effects; D004041:Dietary Fats; D004594:Electrophysiology; D054086:KATP Channels / Q000096:biosynthesis / Q000502:physiology*; D008297:Male; D009126:Muscle Relaxation / Q000187:drug effects; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D032389:Myocytes, Smooth Muscle / Q000187:drug effects / Q000378:metabolism*; D009765:Obesity / Q000378:metabolism* / Q000503:physiopathology*; D018408:Patch-Clamp Techniques; D020110:Pinacidil / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D000959:Antihypertensive Agents; D004041:Dietary Fats; D054086:KATP Channels; D020110:Pinacidil