驯鹿（Rangifer tarandus L.）的骨骼肌特征

Skeletal muscle characteristics of reindeer (Rangifer tarandus L.).

作者信息

Essén-Gustavsson B, Rehbinder C

出版信息

Comp Biochem Physiol A Comp Physiol. 1985;82(3):675-9. doi: 10.1016/0300-9629(85)90450-5.

Abstract

Fibre type composition, fibre areas, capillaries, enzyme activities and intramuscular substrates were analysed on skeletal muscle samples from reindeer. The muscles contained 10-20% Type I fibres and a higher percentage of Type IIB (40-60%) than Type IIA fibres (20-40%). All fibre types revealed medium or dark staining intensity for oxidative capacity. Glycolytic capacity was greatest in Type IIB fibres. All fibres stained for glycogen, while Type I and IIA fibres stained for lipids. The mean number of capillaries in contact with fibres of each type, relative to fibre type area was high in all muscle types. The metabolic profile of reindeer muscle indicates that energy, to a great extent, is produced through oxidative pathways.

摘要

对驯鹿的骨骼肌样本进行了纤维类型组成、纤维面积、毛细血管、酶活性和肌内底物分析。这些肌肉含有10%-20%的I型纤维，IIB型纤维的百分比（40%-60%）高于IIA型纤维（20%-40%）。所有纤维类型的氧化能力均显示为中等或深色染色强度。糖酵解能力在IIB型纤维中最强。所有纤维均对糖原染色，而I型和IIA型纤维对脂质染色。相对于纤维类型面积，与每种类型纤维接触的毛细血管平均数量在所有肌肉类型中都很高。驯鹿肌肉的代谢特征表明，能量在很大程度上是通过氧化途径产生的。