Cost of transport, but not gluteus medius and red blood cells monocarboxylate-transporters density differentiated Brazilian Sport Horses at two performance levels.

Autor: Feringer-Júnior WH; Department of Animal Morphology and Physiology, Laboratory of Pharmacology and Equine Exercise Physiology (LAFEQ), São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil., de Carvalho JRG; Department of Animal Morphology and Physiology, Laboratory of Pharmacology and Equine Exercise Physiology (LAFEQ), São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil., Moranza HG; Department of Animal Morphology and Physiology, Laboratory of Pharmacology and Equine Exercise Physiology (LAFEQ), São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil., de Almeida MLM; Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil., Lemos EGM; Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil., Soares OAB; Teaching and Research Division, Army Central Hospital, Brazilian Army, Rio de Janeiro, Brazil., Ribeiro G; Faculdades Metropolitanas Unidas, HOVET, São Paulo, Brazil., de Camargo Ferraz G; Department of Animal Morphology and Physiology, Laboratory of Pharmacology and Equine Exercise Physiology (LAFEQ), São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences (FCAV), Jaboticabal, São Paulo, Brazil. Electronic address: guilherme.c.ferraz@unesp.br.
Jazyk: angličtina
Zdroj: Research in veterinary science [Res Vet Sci] 2022 Mar; Vol. 143, pp. 20-27. Date of Electronic Publication: 2021 Dec 21.
DOI: 10.1016/j.rvsc.2021.12.008
Abstrakt: Cost of transport (COT) and monocarboxylate transporters (MCTs) could affect the ability to perform fast actions during a jumping discipline. This study aimed to compare the COT and evaluate the MCT1, MCT4, and their auxiliary protein CD147 content in the gluteus medius and RBCs of Brazilian sport horses (BH), a breed developed for jumping competitions, with low-level (LL) or intermediate-level (IL) jumping capacities. The physiological difference between the horses was assessed by an incremental jump test (IJT), in which the cost of lactate (COT LAC ) and heart rate (COT HR ) of running were determined for each animal by the ratio between each variable and the running speed. Western blotting was performed on muscle and RBC membranes to quantify MCT1, MCT4, and CD147. IL showed lower COT LAC and COT HR than LL at all jumping heights. The amount of MCT1, MCT4, and CD147 found in muscle and RBCs were not dependent on performance level. Muscle MCT4 and MCT1 were correlated positively with CD147. We conclude that the relatively small differences between performances did not relevantly influence MCT expression in BH. While MCT analyses are inaccessible for most trainers and veterinarians, the cost of transport measurements is a feasible and sensitive tool to distinguish intermediate and low-level jumping horses.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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