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Titolo:
BIOCHEMICAL PROFILE OF THE GLUTEUS MEDIUS MUSCLE IN HORSES WITH DIFFERENT PERFORMANCE RECORDS
Autore:
RIVERO JLL; SERRANO AL; HENCKEL P;
Indirizzi:
UNIV CORDOBA,GRP BIOL MUSCULAR,FAC VET,DEPT ANAT & ANAT PATHOL COMPARADAS,AVDA MEDINA AZAHARA 9 CORDOBA 14005 SPAIN NATL INST ANIM SCI,DEPT RES PIGS & HORSES DK-8830 TJELE DENMARK
Titolo Testata:
Archivos de medicina veterinaria
fascicolo: 1, volume: 30, anno: 1998,
pagine: 23 - 30
SICI:
0301-732X(1998)30:1<23:BPOTGM>2.0.ZU;2-8
Fonte:
ISI
Lingua:
SPA
Soggetto:
ENZYME-ACTIVITIES; SKELETAL-MUSCLE; HISTOCHEMICAL PROPERTIES; STANDARDBRED TROTTERS; FIBER COMPOSITION; TRAINING-PROGRAM; DIFFERENT AGES; EXERCISE; METABOLISM; SEXES;
Keywords:
SKELETAL MUSCLE; ENZYME ACTIVITY; BIOCHEMISTRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
J.L.L. Rivero et al., "BIOCHEMICAL PROFILE OF THE GLUTEUS MEDIUS MUSCLE IN HORSES WITH DIFFERENT PERFORMANCE RECORDS", Archivos de medicina veterinaria, 30(1), 1998, pp. 23-30

Abstract

Biopsies from three different depths of the Gluteus medius muscle were obtained from 36 endurance horses, aged 8.42 +/- 2.85 years and of both sexes. Twenty of the horses were considered excellent performers according to the mean speed of their three fastest records in enduranceevents, two or three years prior to the study. The other 16 horses were considered moderate performers, with a mean racing speed <12.5 km/h(in 120- to 180-km endurance rides). <14 km/h (in 80- to 120-km endurance rides), or <13.5 km/h (in 40- to 60-km endurance rides). The activities of citrate synthase (an indicator of the citric acid cycle activity), 3-OH-acyl-CoA-dehydrogenase (a marker for lipid oxidation) and lactate dehydrogenase (an indicator of anaerobic metabolism) enzymes were also studied. Significant differences in oxidative enzyme activities but not in the glycolytic lactate dehydrogenase enzyme activities were recorded between performance categories. Excellent performers had higher activities of citrate synthase (P<0.001) and 3-OH-acyl-CaA-dehydrogenase (P<0.02) enzymes than the poorest. The three enzyme activities changed significantly with the increase of sampling depth within the muscle Citrate synthase and 3-OH-acyl-CoA-dehydrogenase activities increased by 60% and 75%, respectively, and that of lactate dehydrogenase decreased by 23% from surface to deep sampling depths. When lactatedehydrogenase/citrate synthase and lactate dehydrogenase/3-OH-acyl-CoA-dehydrogenase enzyme activity ratios were regressed on sampling depth in order to describe the general metabolic profile of the muscle, a strong linear relationship was found in both performance groups (P<0.001). The highest intercepts of these regression lines, found in moderate performers when compared to excellent performers (P<0.001 and P<0.01 for both ratios), clearly show that the best performing endurance horses have a,greater aerobic capacity and a relatively lower anaerobic capacity in the Gluteus medius muscle than those horses that have beenmoderately endurance raced. These results show that fibre metabolic profile of this muscle is directly related to the athletic ability of the horse for endurance events.

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Documento generato il 08/04/20 alle ore 12:11:13