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Titolo:
Skeletal muscle fibre characteristics in young and old bulls and metabolicresponse after a bullfight
Autore:
Aguera, EI; Munoz, A; Castejon, FM; Essen-Gustavsson, B;
Indirizzi:
Univ Cordoba, Fac Vet Med, Dept Anim Biol, Physiol Sect, E-14071 Cordoba, Spain Univ Cordoba Cordoba Spain E-14071 Physiol Sect, E-14071 Cordoba, Spain
Titolo Testata:
JOURNAL OF VETERINARY MEDICINE SERIES A-PHYSIOLOGY PATHOLOGY CLINICAL MEDICINE
fascicolo: 5, volume: 48, anno: 2001,
pagine: 313 - 319
SICI:
0931-184X(200106)48:5<313:SMFCIY>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLYCOGEN DEPLETION PATTERNS; FIBER TYPES; STANDARDBRED TROTTERS; ENZYME-ACTIVITIES; HORSES; CATTLE; BEEF;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Aguera, EI Univ Cordoba, Fac Vet Med, Dept Anim Biol Physiol, E-14071 Cordoba, Spain Univ Cordoba Cordoba Spain E-14071 ol, E-14071 Cordoba, Spain
Citazione:
E.I. Aguera et al., "Skeletal muscle fibre characteristics in young and old bulls and metabolicresponse after a bullfight", J VET MED A, 48(5), 2001, pp. 313-319

Abstract

Fibre type composition, activities of enzymes such as citrate synthase (CS), 3-hydroxyacyl coenzyme A dehydrogenase (HAD), lactate dehydrogenase (LDH), as well as glycogen, lactate and pH levels were analysed in muscle biopsies (m. gluteus medius) obtained after bullfighting from 10 young and 10 old bulls. No changes were seen in fibre type composition between groups, butthe older bulls had higher HAD and LDH activities. Low glycogen concentrations and low pH values were found in both groups, but the lactate concentration after bullfighting was higher in the older group of bulls. The histochemical stain for glycogen revealed that type IIB fibres in both young and old bulls contained more glycogen than seen in type IIA and type I fibres. These results show that young and old bulls have similar muscle fibre type composition, but the metabolic capacity differs, with a higher glycolytic capacity and lactate production in older bulls. Furthermore, it seems that the physical and emotional stress in connection with a bullfight causes a marked depletion of glycogen, especially of type I and IIA fibres.

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Documento generato il 29/02/20 alle ore 15:03:57