title: Proteome analysis of cortical neuronal cultures following cycloheximide, heat stress and MK801 preconditioning.
abstract: Studying endogenous neuroprotective mechanisms induced by preconditioning may provide drug leads to reduce ischemic neuronal death. In this study, we used 2-DE to examine protein expression following cycloheximide, heat stress, and MK801 preconditioning in rat cortical neuronal cultures. Of 150 differentially expressed protein spots selected for identification the protein or tentative protein(s) were identified in 84 cases, representing 50 different proteins. Different protein spots representing the same protein or closely related protein(s) occurred for 21 of the identified proteins and are likely to represent PTMs or proteolytic fragments of the protein. Six protein spots (actin, elongation factor 1-alpha 1, peptidyl-prolyl cis-transisomerase A, Cu/Zn superoxide dismutase, stathmin, tropomyosin) were differentially expressed in all three preconditioning treatments. Twenty-seven protein spots were differentially expressed in two preconditioning treatments, while 51 spots were differentially expressed in one treatment. Three proteins heterogeneous nuclear ribonucleoproteins A2/B1, mitochondrial stress-70 protein, and tropomyosin were detected in control neuronal cultures, but not following one or more preconditioning treatments, while a posttranslational modified form of the voltage dependent anion channel 1 was only detected following cycloheximide preconditioning. In summary, this study has revealed multiple protein changes potentially involved in neuroprotective and neurodamaging pathways, which require further characterization.
authors.affiliation: Department of Neurosurgery, Sir Charles Gairdner Hospital, Centre for Neuromuscular and Neurological Disorders, The University of Western Australia, Nedlands 6009, WA, Australia. meloni@cyllene.uwa.edu.au
authors.forename: Bruno P
authors.initials: BP
authors.lastname: Meloni
authors.forename: Derek
authors.initials: D
authors.lastname: Van Dyk
authors.forename: Rebecca
authors.initials: R
authors.lastname: Cole
authors.forename: Neville W
authors.initials: NW
authors.lastname: Knuckey
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002540:Cerebral Cortex / Q000166:cytology / Q000378:metabolism; D003513:Cycloheximide / Q000494:pharmacology*; D016291:Dizocilpine Maleate / Q000494:pharmacology*; D015536:Down-Regulation / Q000187:drug effects; D015180:Electrophoresis, Gel, Two-Dimensional; D018882:Heat Stress Disorders / Q000503:physiopathology*; D019194:Ischemic Preconditioning; D009474:Neurons / Q000737:chemistry* / Q000187:drug effects; D020543:Proteome / Q000032:analysis* / Q000096:biosynthesis*; D051381:Rats; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015854:Up-Regulation
chemical_list: D020543:Proteome; D016291:Dizocilpine Maleate; D003513:Cycloheximide