title: Plasma endothelin-1 immunoreactivity in normal dogs and dogs with acquired heart disease.
abstract: We sought to measure plasma endothelin-1 (ET-1) concentrations in normal dogs and to compare them with those measured in dogs with acquired heart disease with or without pulmonary edema. A sandwich enzyme-linked immunosorbent assay kit was validated and used to measure ET-1 immunoreactivity in plasma samples obtained from 32 normal dogs and 46 dogs with either dilated cardiomyopathy (DCM, n = 27) or degenerative valvular disease (CDVD, n = 19) with (n = 30) or without (n = 16) overt congestive heart failure (CHF). Plasma ET-1 concentrations (geometric mean, 95% confidence interval of geometric mean) were 1.17 (1.04-1.32) fmol/mL in the 32 normal control dogs, 1.25 (0.981-1.60) fmol/mL in 16 dogs with DCM (n = 9) or CDVD (n = 7) without CHF, and 2.51 (2.10-3.01) fmol/mL in 30 dogs with DCM (n = 18) and CDVD (n = 12) with CHE Plasma immunoreactivity of ET-1 was significantly higher in dogs with CHF in comparison with normal dogs (P < .001) and dogs with heart disease without CHF (P < .001). No significant difference was found between normal dogs and dogs with heart disease but without CHF (P > .05). Significant correlations were between plasma ET-I concentrations and left atrial:aortic ratio (P < .0001, r2 = .39), left ventricular internal dimension at end-diastole indexed to aortic diameter (P < .0001, r2 = .30) or body surface area (BSA) (P = .0071, r2 = .10), and left ventricular internal dimension at end-systole indexed to aortic diameter (P = .0003, r- = .17) or BSA (P = .0008, r2 = .15).
authors.affiliation: Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL, USA. prosek@uiuc.edu
authors.forename: Robert
authors.initials: R
authors.lastname: Prosek
authors.forename: D David
authors.initials: DD
authors.lastname: Sisson
authors.forename: Mark A
authors.initials: MA
authors.lastname: Oyama
authors.forename: Alexander W
authors.initials: AW
authors.lastname: Biondo
authors.forename: Philip F
authors.initials: PF
authors.lastname: Solter
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000097:blood; D009202:Cardiomyopathies / Q000175:diagnosis / Q000662:veterinary; D016022:Case-Control Studies; D004283:Dog Diseases / Q000097:blood / Q000175:diagnosis*; D004285:Dogs / Q000097:blood; D019332:Endothelin-1 / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis / Q000662:veterinary*; D006333:Heart Failure / Q000175:diagnosis / Q000662:veterinary; D006349:Heart Valve Diseases / Q000175:diagnosis / Q000662:veterinary; D008297:Male; D011237:Predictive Value of Tests
chemical_list: D015415:Biomarkers; D019332:Endothelin-1