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  • 1
    Electronic Resource
    Electronic Resource
    Satellite cells of the rat soleus muscle in the process of compensatory hypertrophy combined with denervation (1975)
    Springer
    Cell & tissue research 160 (1975), S. 411-421 
    Details
    ISSN: 1432-0878
    Keywords: Compensatory muscle hypertrophy ; Muscle denervation ; Atrophy and hypertrophy ; Muscle satellite cells ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Compensatory hypertrophy was induced in the rat soleus muscle by sectioning the tendon of the ipsilateral gastrocnemius and plantaris muscle. Seven days after tenotomy of synergistic muscles, when soleus hypertrophy attains about 40%, the number of satellite cells (expressed as percentage of all muscle nuclei found in the same cross-sections) as revealed by electron microscopy, was increased from 5.8±0.06% in the normal soleus muscle to 16.6±1.26%. After four days' denervation of the soleus muscle the percentage of satellite cells was increased to 7.2±0.62%. In experiments where hypertrophy of the soleus muscle was combined with denervation three days after tenotomy of synergists, and examined after another four days (during which time it loses, as has previously been shown, over 40% of its predenervation weight), the number of satellite cells was greatly increased to 29.9±3.42%. This increase is apparently due to two independent processes which take place during the first postoperative period: a) mitotic division of satellite cells during the early stages of compensatory hypertrophy and b) pinching off of muscle nuclei from rapidly atrophying muscle fibres due to subsequent denervation. Activation of satellite cells was mainly manifested by expansion of smooth and especially of rough endoplasmic reticulum, a rich Golgi complex, high pinocytotic activity, increased number of ribosomes and by nuclear changes. Concomitantly with the increased number of satellite cells, proliferation of fibroblasts, macrophages and mast cells could be observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222049
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  • 2
    Electronic Resource
    Electronic Resource
    Enzyme activity patterns of energy metabolism in skiers of different performance levels (M. quadriceps femoris) (1982)
    Springer
    European journal of applied physiology 48 (1982), S. 315-322 
    Details
    ISSN: 1439-6327
    Keywords: Muscle enzyme activities ; VO2 max ; O2-pulse ; % Body fat ; Performance ; Skiers ; Seasonal changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Changes in the activity of muscle enzymes of energy metabolism were studied in two groups of skiers (A, B) with a different sports performance (triosephosphate dehydrogenase-TPDH, lactate dehydrogenase-LDH, glycerol-3-phosphate dehydrogenase-GPDH, hexokinase-HK, malate dehydrogenase-MDH, citrate synthase-CS, hydroxyacyl, CoA dehydrogenase-HOADH). 1. In a group of ski-runners (A) significantly higher activities of CS, MDH, HOADH in the preparatory period (October) and also at the end of the competition period (March) were found in athletes with higher sports performance. 2. Significantly lower activities of LDH, GPDH, MDH, CS, HOADH were found in downhill skiers (group B). 3. Some significant correlations were established, both between the activities of individual enzymes (TPDH, GPDH, HK, CS, HOADH) and between the enzymes and indicators of functional capacity (MDH, CS, HOADH, VO2 max, HR max, O2-pulse max, body fat, laboratory performance).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430221
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The relationship between anaerobic performance and muscle metabolic capacity and fibre distribution (1985)
    Springer
    European journal of applied physiology 54 (1985), S. 413-415 
    Details
    ISSN: 1439-6327
    Keywords: Anaerobic performance ; Muscle enzyme activities ; Muscle fibre distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Relationships between functional anaerobic indicators and the character of cellular muscle energy metabolism were studied. Twelve untrained male students were tested by a specific anaerobic test on the treadmill. The mean values of the anaerobic test were as follows: blood lactate 10.69 mmol · 1−1, running speed 16.08 km · h−1 and duration 92.67 s. The average distribution of muscle fibres (m. vastus lateralis) was: type I 52.2%, type II A 29.0% and type II B 18.8%. The mean enzyme activity values were: triosephosphate dehydrogenase (TPDH) 4.67 Μkat · g−1 w.w., lactate dehydrogenase (LDH) 5.76 Μkat · g−1 w.w, citrate synthase (CS) 0.21 Μkat · g−1 w.w. and hydroxyacyl-CoA dehydrogenase (HAD) 0.12 Μkat · g−1 w.w. Significant negative correlations were found between δLA and CS (r=0.64) and % of fibre type II B and CS (r=0.78) and positive correlations between % of fibre type I and CS and/or HAD (r=0.60 andr=0.62, respectively).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02337186
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    Paper (German National Licenses)
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