title: Plasma L-carnitine concentration in healthy dogs and dogs with hepatopathy.
abstract: BACKGROUND
  L-Carnitine has an essential role in lipid metabolism. Disturbances of L-carnitine metabolism can influence the energy supply of the organism. L-Carnitine is synthesized exclusively in the liver. Hence, we hypothesized that liver disease can influence L-carnitine metabolism.
  
  
  OBJECTIVE
  The goal of this study was to compare plasma L-carnitine concentrations in dogs with different liver diseases of differing severity with the plasma L-carnitine concentrations of healthy dogs.
  
  
  METHODS
  Sixteen dogs with inflammatory liver disease and 12 dogs with liver neoplasia were included in the study. Liver disease was diagnosed by clinical chemistry, ultrasonography, and histology of liver biopsy specimens. L-Carnitine concentration was measured in plasma samples using mass spectrometry, and compared among groups using unpaired Student's t-tests.
  
  
  RESULTS
  Compared with healthy controls (24.4 +/- 8.4 micromol/L), the plasma L-carnitine concentration in dogs with liver disease (44.2 +/- 23.7 micromol/L) was significantly higher (P<.0001). The difference in L-carnitine concentration between dogs with moderate (n=8; 33.6 +/- 13.7 micromol/L) and severe (n=8; 57.4 +/- 22.9 micromol/L) hepatitis was also significant (P=.02). No difference in plasma L-carnitine concentration was found between dogs with hepatitis and those with liver tumors.
  
  
  CONCLUSIONS
  Liver disease in dogs was accompanied by elevated plasma L-carnitine concentration. The severity of hepatitis appears to influence L-carnitine concentration.
authors.affiliation: Institute of Veterinary Medicine, University of Goettingen, Goettingen, Germany. sneuman@gwdg.de
authors.forename: Stephan
authors.initials: S
authors.lastname: Neumann
authors.forename: Heike
authors.initials: H
authors.lastname: Welling
authors.forename: Sibylle
authors.initials: S
authors.lastname: Thuere
authors.forename: Franz-Josef
authors.initials: FJ
authors.lastname: Kaup
mesh_terms: D000818:Animals; D002331:Carnitine / Q000097:blood*; D004283:Dog Diseases / Q000097:blood*; D004285:Dogs / Q000097:blood*; D005260:Female; D006262:Health; D008107:Liver Diseases / Q000097:blood / Q000662:veterinary*; D008297:Male; D012189:Retrospective Studies
chemical_list: D002331:Carnitine