Myofibrillar protein and gene expression in acute quadriplegic myopathy
2009 (English)In: Journal of the Neurological Sciences, ISSN 0022-510X, E-ISSN 1878-5883, Vol. 285, no 1-2, 28-38 p.Article in journal (Refereed) Published
The dramatic muscle wasting, preferential loss of myosin and impaired muscle function in intensive care unit (ICU) patients with acute quadriplegic myopathy (AQM) have traditionally been suggested to be the result of proteolysis via specific proteolytic pathways. In this study we aim to investigate the mechanisms underlying the preferential loss of thick vs. thin filament proteins and the reassembly of the sarcomere during the recovery process in muscle samples from ICU patients with AQM. Quantitative and qualitative analyses of myofibrillar protein and mRNA expression were analyzed using SDS-PAGE, confocal microscopy, histochemistry and real-time PCR. The present results demonstrate that the transcriptional regulation of myofibrillar protein synthesis plays an important role in the loss of contractile proteins, as well as the recovery of protein levels during clinical improvement, myosin in particular, presumably in concert with proteolytic pathways, but the mechanisms are specific to the different thick and thin filament proteins studied.
Place, publisher, year, edition, pages
2009. Vol. 285, no 1-2, 28-38 p.
myosin, actin, myosin binding proteins, acute quadriplegic myopathy, mRNA
Medical and Health Sciences
Research subject Clinical Neurophysiology
IdentifiersURN: urn:nbn:se:uu:diva-108256DOI: 10.1016/j.jns.2009.04.041ISI: 000270476400006OAI: oai:DiVA.org:uu-108256DiVA: diva2:234699