In vitro O2 uptake and histochemical fiber type of resting hamster muscles.
In vitro O2 uptake and histochemical fiber type of resting hamster muscles.
复制标题
静息仓鼠肌肉的体外 O2 吸收和组织化学纤维类型。
DOI：
10.1152/jappl.1984.57.1.246
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
Pittman,RN
中科院分区：
文献类型：
--
作者：
Sullivan,SM;Pittman,RN
测定了三种金黄地鼠横纹肌的体外耗氧量(VO2)、组织化学纤维类型、毛细血管排列和肌肉纤维几何形状。这些肌肉的组织化学纤维类型组成(按数量百分比)明显不同：牵引肌(70%FG，快抽动，糖酵解；16%雾，快抽动，氧化-糖酵解；14%SO，慢抽动，氧化)；比目鱼肌(57%FOG，43%SO)和缝匠肌(98%FG，2%雾)。缝匠肌VO2[0.80±/-0.034(SE)mlO2×min~(-1)×100g~(-1)]与牵引肌(0.89±-0.038)和比目鱼肌(1.00±-0.048)相比有显著差异(P<0.01)，纤维周围的毛细血管数和比表面积/体积雾纤维大于FG纤维。所有类型的纤维似乎都是大致椭圆形的。在比目鱼肌中，毛细血管均匀地分布在纤维周围，但它们更多地位于牵引肌和缝匠肌中大直径的末端。结果表明，纤维的氧化能力(基于其组织化学染色模式)、周围毛细血管的数量和表面积/体积之间存在关系。此外，结果表明，光纤周围的VO2和毛细管间距可能取决于光纤类型。
In vitro oxygen consumption (VO2), histochemical fiber type, capillary arrangement, and muscle fiber geometry were measured in three hamster striated muscles. These muscles varied markedly in their histochemical fiber type composition (% by number): retractor (70% FG, fast-twitch, glycolytic; 16% FOG, fast-twitch, oxidative-glycolytic; 14% SO, slow-twitch, oxidative); soleus (57% FOG, 43% SO), and sartorius (98% FG, 2% FOG). Sartorius VO2 [0.80 +/- 0.034 (SE) ml O2 X min-1 X 100 g-1] was significantly different (P less than 0.01) from VO2 of retractor (0.89 +/- 0.038) and soleus (1.00 +/- 0.048).The number of capillaries around a fiber and the surface area/volume were greater for FOG and SO fibers than for FG fibers. Fibers of all types appeared to be roughly elliptical in shape. Capillaries were uniformly distributed around fibers in the soleus, but they were located more toward the ends of the major diameter in the retractor and sartorius. The results suggest a relationship among a fiber's oxidative capacity (based on its histochemical staining pattern), number of surrounding capillaries and surface area/volume. Furthermore, results suggest that VO2 and capillary spacing around a fiber may depend on fiber type.