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[Catabolic aspects of cranial trauma]
O Mansoor1, J E Bazin, B Beaufrère
1Département d'anesthésie-réanimation, RCO, hôpital G-Montpied, Clermont-Ferrand, France.
Annales Francaises D'Anesthesie Et De Reanimation
|September 29, 1998
Summary
Head-trauma patients in intensive care experience muscle wasting due to increased protein breakdown. Research explores interventions like hormone therapy and supplements to combat this hypercatabolic state.
Area of Science:
- Biochemistry
- Physiology
- Trauma Medicine
Context:
- Intensive care unit (ICU) patients with head trauma exhibit significant metabolic derangements.
- A hypermetabolic and hypercatabolic state is characteristic, leading to negative nitrogen balance.
Purpose:
- To investigate the mechanisms behind increased muscle proteolysis in head-trauma patients.
- To identify potential therapeutic targets for mitigating muscle wasting and weakness.
Summary:
- Head trauma induces increased muscle proteolysis, primarily via the ATP-ubiquitin-dependent pathway, despite normal overall protein synthesis.
- Muscle protein synthesis decreases while hepatic protein synthesis increases, contributing to net muscle loss.
- Increased glucocorticoid release during the acute phase response may drive muscle proteolysis.
Impact:
- Understanding these pathways is crucial for developing effective nutritional and pharmacological interventions.
- Potential therapies include glutamine, vitamin, or zinc supplementation, and exploring glucocorticoid antagonists, growth hormone, or anti-cytokines.