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Acute Quadriplegic Myopathy: An Acquired "Myosinopathy"
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Clinical Neurophysiology.
2008 (English)In: Advances in Experimental Medicine and Biology, ISSN 0065-2598, Vol. 642, 92-98 p.Article in journal (Refereed) Published
Abstract [en]

Acquired neuromuscular disorders have been shown to be very common in critically ill patients receiving prolonged mechanical ventilation in the intensive care unit (ICU). Acute Quadriplegic Myopathy (AQM) is a specific acquired myopathy in ICU patients. Patients with AQM are characterized by severe muscle weakness and atrophy of spinal nerve innervated limb and trunk muscles, while cranial nerve innervated craniofacial muscles, sensory and cognitive functions are spared or less affected. The muscle weakness is associated with altered muscle membrane properties and a preferential loss of the motor protein myosin and myosin-associated thick filament proteins. Prolonged mechanical ventilation, muscle unloading, postsynaptic block of neuromuscular transmission, sepsis and systemic corticosteroid hormone treatment have been suggested as important triggering factors in AQM. However, the exact mechanisms underlying the loss of thick filament proteins are not known, though enhanced myofibrillar protein degradation in combination with a downregulation of protein synthesis at the transcriptional level play important roles.

Place, publisher, year, edition, pages
2008. Vol. 642, 92-98 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-129267ISI: 000261700300009OAI: oai:DiVA.org:uu-129267DiVA: diva2:338655
Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2010-08-10Bibliographically approved

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