The influence of stress on substrate utilization in skeletal muscle fibres of reindeer (Rangifer tarandus L)
Moderate stress in connection with handling, sampling and herding of reindeer caused a very pronounced depletion of glycogen in mainly type IIA and IIB fibres. Also intramuscular triglyceride levels decreased but mainly in type I fibres. Muscle lactate levéls increased in all animals but not to the...
| Published in: | Rangifer |
|---|---|
| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Septentrio Academic Publishing
1984
|
| Subjects: | |
| Online Access: | https://doi.org/10.7557/2.4.1.483 https://doaj.org/article/1651b9e2b50d4f44857370b2142b5e9c |
| Summary: | Moderate stress in connection with handling, sampling and herding of reindeer caused a very pronounced depletion of glycogen in mainly type IIA and IIB fibres. Also intramuscular triglyceride levels decreased but mainly in type I fibres. Muscle lactate levéls increased in all animals but not to the levels found in pigs exposed to stress or exertion. Reindeer muscles appeared to have a great capacity to oxidize both carbohydrates and lipids. All animals showed increased Cortisol, urea and AS AT values. A marked depletion of glycogen and lipids in many of the fibres may be a factor involved in the development of skeletal muscle degeneration in connection with mental stress and exertion as there seems to be a correlation between high ASAT values and substrate depleted musclefibres. A connection may therefore exist between high instramuscular substrate stores and the ability of a muscle to tolerate stress. Av stress påverkat substratutnyttjande i skelettmuskelfibrer hos ren Abstract in Swedish / Sammanfattning: Måttlig stress betingad av hantering, provtagning och drivning av ren orsakade en mycket kraftig minskning av muskelglykogen i fråmst typ IIA och typ IIB fibrer. Aven triglycerider minskade framfor allt i typ I fibrer. Muskellaktatnivåerna okade i samtliga undersokta djur, men inte till nivåer som ses hos gris utsatta for stress eller fysisk anstrångning.Renens muskler uppvisade en mycket hog kapacitet att oxidera, forbranna, både kolhydrat och fett. Alla djur uppvisade forhojda Cortisol, urea och ASAT varden. Den mycket kraftiga tomningen av kolhydrat och fett i många muskelfibrer kan vara en faktor medverkande till muskeldegeneration i samband med mental stress och anstrangning då hoga ASAT-vården synes vara korrelerade till uttomda muskelfibrer. Ett samband mellan hog instramuskulår substratupplagring och formåga att tåla stress kan således foreligga. Stressin vaikuttaneen poron substraattihyvåk-sikåytto luurangon lihaksiston kuiduissa. Abstract in Finnish / Yhteenveto: Kohtuullinen stressi edellyttåen ... |
|---|