title: Time-dependent changes in protein expression in rainbow trout muscle following hypoxia.
abstract: Adaptation to hypoxia is a complex process, and individual proteins will be up- or down-regulated in order to address the main challenges at any given time. To investigate the dynamics of the adaptation, rainbow trout (Oncorhynchus mykiss) was exposed to 30% of normal oxygen tension for 1, 2, 5 and 24 h respectively, after which muscle samples were taken. The successful investigation of numerous proteins in a single study was achieved by selectively separating the sarcoplasmic proteins using 2-DE. In total 46 protein spots were identified as changing in abundance in response to hypoxia using one-way ANOVA and multivariate data analysis. Proteins of interest were subsequently identified by MS/MS following tryptic digestion. The observed regulation following hypoxia in skeletal muscle was determined to be time specific, as only a limited number of proteins were regulated in response to more than one time point. The cellular response to hypoxia included regulation of proteins involved in maintaining iron homeostasis, energy levels and muscle structure. In conclusion, this proteome-based study presents a comprehensive investigation of the expression profiles of numerous proteins at four different time points. This increases our understanding of timed changes in protein expression in rainbow trout muscle following hypoxia.
authors.affiliation: National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark. tuwu@food.dtu.dk
authors.forename: Tune
authors.initials: T
authors.lastname: Wulff
authors.forename: Alfred
authors.initials: A
authors.lastname: Jokumsen
authors.forename: Peter
authors.initials: P
authors.lastname: Højrup
authors.forename: Flemming
authors.initials: F
authors.lastname: Jessen
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D015180:Electrophoresis, Gel, Two-Dimensional; D004734:Energy Metabolism / Q000502:physiology; D006706:Homeostasis / Q000502:physiology; D000860:Hypoxia / Q000378:metabolism* / Q000473:pathology; D007501:Iron / Q000378:metabolism; D055442:Metabolome / Q000187:drug effects; D009124:Muscle Proteins / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology / Q000502:physiology; D017686:Oncorhynchus mykiss / Q000378:metabolism* / Q000502:physiology; D010100:Oxygen / Q000494:pharmacology; D011897:Random Allocation; D053719:Tandem Mass Spectrometry; D013997:Time Factors
chemical_list: D009124:Muscle Proteins; D007501:Iron; D010100:Oxygen