PMID- 31422757 OWN - NLM STAT- MEDLINE DCOM- 20210201 LR - 20210201 IS - 1532-2750 (Electronic) IS - 1098-612X (Linking) VI - 22 IP - 7 DP - 2020 Jul TI - Plasma homocysteine concentration in privately owned healthy adult cats: assessment of biological determinants and establishment of a reference interval. PG - 623-630 LID - 10.1177/1098612X19868549 [doi] AB - OBJECTIVES: The assessment of homocysteine status in diseased cats has indicated high plasma concentrations in chronic kidney disease and yielded conflicting results with respect to cardiovascular disorders. Previous investigations in small populations of normal cats revealed greater-than-expected variability in plasma homocysteine concentration. The purpose of this study was to determine biological determinants and the reference interval (RI) of plasma homocysteine concentration in the feline species, under strict pre-analytical conditions. METHODS: In this prospective observational study, privately owned healthy adult cats underwent a complete physical examination, urinalysis and blood testing, in order to rule out any signs of disease. Plasma homocysteine concentration was measured using high-performance liquid chromatography-tandem mass spectrometry. RESULTS: Of 151 cats recruited, 30 cats were not included owing to abnormal physical examination or fractious behaviour, and 30 cats were excluded based on abnormalities on blood work or urinalysis. Plasma homocysteine concentrations >28 micromol/l were associated with a dietary protein content >9.3 g/100 kcal metabolisable energy. The RI for plasma homocysteine concentration was determined to be 6.2-52.3 micromol/l. CONCLUSIONS AND RELEVANCE: Normal values for plasma homocysteine concentration in cats have a wide RI, suggesting high inter-individual variability. Whether some healthy cats exhibit impaired homocysteine metabolism remains to be elucidated. FAU - Drut, Amandine AU - Drut A AUID- ORCID: 0000-0002-8700-6004 AD - Department of Clinical Science, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. AD - Nutrition, Physiopathology and Pharmacology Unit, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Soetart, Nicolas AU - Soetart N AD - Department of Biology, Pathology and Food Science, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Bertin, Carole AU - Bertin C AD - Department of Biochemistry and Genetics, University Hospital, Angers, France. FAU - Le Corff, Emmanuelle AU - Le Corff E AD - Department of Clinical Science, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Berder, Caroline AU - Berder C AD - Nutrition, Physiopathology and Pharmacology Unit, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. AD - Department of Biology, Pathology and Food Science, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Thorin, Chantal AU - Thorin C AD - Nutrition, Physiopathology and Pharmacology Unit, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Nguyen, Patrick AU - Nguyen P AD - Nutrition, Physiopathology and Pharmacology Unit, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. FAU - Simard, Gilles AU - Simard G AD - Department of Biochemistry and Genetics, University Hospital, Angers, France. FAU - Mallem, M Yassine AU - Mallem MY AD - Nutrition, Physiopathology and Pharmacology Unit, Oniris - Nantes Atlantic National College of Veterinary Medicine, Food Science and Engineering, Nantes, France. LA - eng PT - Journal Article DEP - 20190819 PL - England TA - J Feline Med Surg JT - Journal of feline medicine and surgery JID - 100897329 RN - 0LVT1QZ0BA (Homocysteine) SB - IM MH - Animals MH - Cats/*blood MH - Chromatography, High Pressure Liquid MH - Diet/veterinary MH - Homocysteine/*blood MH - Prospective Studies MH - Reference Values OTO - NOTNLM OT - Cardiovascular disease OT - cobalamin OT - folate OT - kidney disease EDAT- 2019/08/20 06:00 MHDA- 2021/02/02 06:00 CRDT- 2019/08/20 06:00 PHST- 2019/08/20 06:00 [pubmed] PHST- 2021/02/02 06:00 [medline] PHST- 2019/08/20 06:00 [entrez] AID - 10.1177/1098612X19868549 [doi] PST - ppublish SO - J Feline Med Surg. 2020 Jul;22(7):623-630. doi: 10.1177/1098612X19868549. Epub 2019 Aug 19.