High oxidative capacity and type IIx fibre content in springbok and fallow deer skeletal muscle suggest fast sprinters with a resistance to fatigue
High oxidative capacity and type IIx fibre content in springbok and fallow deer skeletal muscle suggest fast sprinters with a resistance to fatigue
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DOI：
10.1242/jeb.073684
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发表时间：
2012-11-01
影响因子：
2.8
通讯作者：
Kohn, Tertius Abraham
中科院分区：
文献类型：
--
作者：
Curry, Jennifer Wendy;Hohl, Rodrigo;Kohn, Tertius Abraham
一些野生羚羊是快速短跑运动员，比其他动物更能抵抗疲劳。因此，本研究调查了两个野生羚羊物种，以更好地了解他们的报告性能。肌肉样本死后收集的股外侧肌和腰最长肌的休闲鹿（达马达马）和跳羚（Antidorcas marsupialis）进行了分析肌球蛋白重链异构体含量，柠檬酸合成酶，3-羟酰辅酶A脱氢酶，磷酸果糖激酶，乳酸脱氢酶和肌酸激酶活性。横截面积，纤维类型和每种纤维类型的氧化能力，确定在股外侧肌。在两个肌肉群和物种的主要纤维类型是IIX型（>50%），与跳羚有更多的IIX型纤维比休闲鹿（P90和46公里每小时（-1），分别，部分原因是具有大的IIX型纤维含量和高的糖酵解能力。高氧化能力也表明，这些动物可能能够承受长时间的疲劳。
Some wild antelopes are fast sprinters and more resistant to fatigue than others. This study therefore investigated two wild antelope species to better understand their reported performance capability. Muscle samples collected post mortem from the vastus lateralis and longissimus lumborum of fallow deer (Dama dama) and springbok (Antidorcas marsupialis) were analysed for myosin heavy chain isoform content, citrate synthase, 3-hydroxyacyl CoA dehydrogenase, phosphofructokinase, lactate dehydrogenase and creatine kinase activities. Cross-sectional areas, fibre type and oxidative capacities of each fibre type were determined in the vastus lateralis only. The predominant fibre type in both muscle groups and species were type IIX (>50%), with springbok having more type IIX fibres than fallow deer (P90 and 46 km h(-1), respectively, partly from having large type IIX fibre contents and high glycolytic capacities. The high oxidative capacities also suggest that these animals may be able to withstand fatigue for long periods of time.