title: Can 18F-FDG-PET show differences in myocardial metabolism between Wistar Kyoto rats and spontaneously hypertensive rats?
abstract: Positron emission tomography (PET) is useful for evaluating the cardiac metabolism of free fatty acid, glucose and oxygen both in human clinical practice and in experimental animal models. However, no data are available for such an evaluation in a model of stable compensated left ventricular hypertrophy in 14-month-old spontaneously hypertensive rats (SHRs). This study was designed to assess the metabolism of myocardial glucose in SHRs using 2-deoxy-2-[18F]fluoro-D-glucose ((18)F-FDG) using PET. The study was performed on 14-month-old male SHRs (n = 4) and age-matched Wistar Kyoto (WKY) rats (n = 4). PET scans were performed after the administration of anaesthesia with isoflurane and injection of a bolus of 39.37 ± 3.25 (mean ± SD) MBq (1.06 mCi) of (18)F-FDG. The standardized uptake value (SUV) was used to evaluate (18)F-FDG uptake by the heart. The analysis of SUV showed increased metabolism in the left ventricle of SHRs compared with WKY rats. Our results show that small animal PET using (18)F-FDG can be performed in 14-month-old SHRs to evaluate new therapies in the regression of left ventricular hypertrophy in SHRs because pathological myocardial metabolism in the SHR differs from the normal metabolism of the WKY rat.
authors.affiliation: Department of Anaesthesiology, Reanimation and Intensive Care, Hospital General Universitario Gregorio Marañón, Department of Pharmacology, Faculty of Medicine, Universidad Complutense, Madrid, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Quintana-Villamandos
authors.forename: M J
authors.initials: MJ
authors.lastname: Delgado-Martos
authors.forename: C
authors.initials: C
authors.lastname: Fernandez-Riveira
authors.forename: M C
authors.initials: MC
authors.lastname: Fernández-Criado
authors.forename: A
authors.initials: A
authors.lastname: Martos-Rodríguez
authors.forename: F
authors.initials: F
authors.lastname: Canillas
authors.forename: E
authors.initials: E
authors.lastname: Delgado-Baeza
mesh_terms: D000818:Animals; D019788:Fluorodeoxyglucose F18; D005947:Glucose / Q000378:metabolism*; D008297:Male; D009206:Myocardium / Q000378:metabolism*; D049268:Positron-Emission Tomography / Q000379:methods / Q000662:veterinary*; D051381:Rats; D011918:Rats, Inbred SHR / Q000378:metabolism*; D011921:Rats, Inbred WKY / Q000378:metabolism*
chemical_list: D019788:Fluorodeoxyglucose F18; D005947:Glucose
keywords:   18F-FDG–PET; cardiac metabolism; spontaneously hypertensive rats; ventricular hypertrophy