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- W1993879746 abstract "Objective: Inflammation and immobility are comorbid etiological factors inducing muscle weakness in critically ill patients. This study establishes a rat model to examine the effect of inflammation and immobilization alone and in combination on muscle contraction, histology, and acetylcholine receptor regulation. Design: Prospective, randomized, experimental study. Setting: Animal laboratory of a university hospital. Subjects: Sprague-Dawley rats. Interventions: To produce systemic inflammation, rats (n = 34) received three consecutive intravenous injections of Corynebacterium parvum on days 0, 4, and 8. Control rats (n = 21) received saline. Both groups were further divided to have one hind limb either immobilized by pinning of knee and ankle joints or sham-immobilized (surgical leg). The contralateral nonsurgical leg of each animal served as control (nonsurgical leg). Measurements and Main Results: After 12 days, body weight and muscle mass were significantly reduced in all C. parvum animals compared with saline-injected rats. Immobilization led to local muscle atrophy. Normalized to muscle mass, tetanic contraction was reduced in the surgical leg after immobilization (7.64 ± 1.91 N/g) and after inflammation (8.71 ± 2.0 N/g; both p < .05 vs. sham immobilization and saline injection, 11.03 ± 2.26 N/g). Histology showed an increase in inflammatory cells in all C. parvum–injected animals. Immobilization in combination with C. parvum injection had an additive effect on inflammation. Acetylcholine receptors were increased in immobilized muscles and in all muscles of C. parvum–injected animals. Conclusions: The muscle weakness in critically ill patients can be replicated in our novel rat model. Inflammation and immobilization independently lead to muscle weakness." @default.
- W1993879746 created "2016-06-24" @default.
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- W1993879746 date "2008-03-01" @default.
- W1993879746 modified "2023-10-14" @default.
- W1993879746 title "Systemic inflammatory response syndrome increases immobility-induced neuromuscular weakness*" @default.
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- W1993879746 doi "https://doi.org/10.1097/ccm.0b013e3181659669" @default.
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