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Titolo:
Muscle fibre growth in undernourished reindeer calves (Rangifer tarandus tarandus L.) during winter
Autore:
Poso, AP; Heiskari, U; Lindstrom, M; Nieminen, M; Soveri, T;
Indirizzi:
Univ Helsinki, Dept Vet Basic Sci, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ci, FIN-00014 Helsinki, Finland Finnish Game & Fisheries Res Inst, FIN-99910 Kaamanen, Finland Finnish Game & Fisheries Res Inst Kaamanen Finland FIN-99910 en, Finland
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 2-3, volume: 129, anno: 2001,
pagine: 495 - 500
SICI:
1095-6433(200106)129:2-3<495:MFGIUR>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIBER COMPOSITION; BLOOD-CHEMISTRY; HORSES;
Keywords:
cathepsin; middle gluteal muscle; muscle fibre; protein degradation; reindeer; under-nutrition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Poso, AP Univ Helsinki, Dept Vet Basic Sci, POB 57, FIN-00014 Helsinki, Finland Univ Helsinki POB 57 Helsinki Finland FIN-00014 elsinki, Finland
Citazione:
A.P. Poso et al., "Muscle fibre growth in undernourished reindeer calves (Rangifer tarandus tarandus L.) during winter", COMP BIOC A, 129(2-3), 2001, pp. 495-500

Abstract

To study whether moderate under-nutrition causes muscle wasting, reindeer (Rangifer tarandus tarandus L.) calves were fed either pelleted reindeer feed ad libitum (n = 8) or restricted amounts of lichens (n = 8). The restricted amount was 60% of ad libitum intake of lichens, and the feeding period was 6 weeks preceded by a 2-week adjustment period. Biopsy samples from themiddle gluteal muscle (M. gluteus medius) for the analysis of fibre composition and area, as well as for the activity of cathepsin B were taken before the restriction period in November and January, and after the restrictionperiod in April. In all calves the muscle fibre composition remained unchanged during the winter. In the lichen group, the fibre size also remained unchanged, whereas in control calves the cross sectional area of type I and type IIA fibres increased significantly from November to April. Cathepsin Bactivity decreased in all calves from November to January and remained at that low level for the rest of the study period, which suggests an attenuated rate of protein degradation. These results can be taken as an indicationthat moderate under-nutrition causes no muscle wasting in reindeer calves,and the decreased availability of nitrogen is partially compensated for byadaptive decrease in protein degradation. Interestingly the adaptive changes in protein metabolism are equally well seen in the well-fed controls as in the undernourished lichen-fed reindeer. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 14:38:30