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Topographical localization of muscle glycogen: an ultrahistochemical study in the human vastus lateralis
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Fridén, Jan (författare)
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- Seger, Jan (författare)
- Gymnastik- och idrottshögskolan,Institutionen för idrotts- och hälsovetenskap
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- Ekblom, Björn (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
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(creator_code:org_t)
- 1989
- 1989
- Engelska.
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Ingår i: Acta Physiologica Scandinavica. - 0001-6772 .- 1365-201X. ; 135, s. 381-391
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- The fine structural pattern of glycogen storage in resting and sprint-exercised human vastus lateralis muscle fibres of different types was analysed using ultrahistochemical methods. Three male subjects (31-36 years) performed 60 consecutive, supramaximal bouts of bicycle exercise, each starting every 1 min and having a duration of 8 s (including approximately 3 s of acceleration). The load was estimated to correspond to 200% of VO2-max. Five other subjects (22-27 years) constituted controls. Ultrathin sections stained with periodic acid-thiosemicarbazide-silver proteinate (PA-TSC-SP) clearly revealed a compartmental distribution of glycogen. Glycogen is stored at five topographically, and probably also functionally, different locations. They are the subsarcolemmal, intermyofibrillar, para-Z-disc, N2-line, and H-zone spaces. During the exercise, glycogen from the N2-line and para-Z-disc locations is preferentially utilized. Serial sections stained with uranyl acetate and lead citrate demonstrated that glycogen stores of the type 2 fibres were more depleted than those of type 1 fibres. The implications of the differential intracellular glycogen storage are discussed
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
Nyckelord
- Physiology
- Fysiologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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