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Kaltwaßer B, Schulenborg T, Beck F, Klotz M, Schäfer KH, Schmitt M, Sickmann A, Friauf E. Developmental changes of the protein repertoire in the rat auditory brainstem: a comparative proteomics approach in the superior olivary complex and the inferior colliculus with DIGE and iTRAQ. J Proteomics 2012. [PMID: 23201114 DOI: 10.1016/j.jprot.2012.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Protein profiles of developing neural circuits undergo manifold changes. The aim of this proteomic analysis was to quantify postnatal changes in two auditory brainstem areas in a comparative approach. Protein samples from the inferior colliculus (IC) and the superior olivary complex (SOC) were obtained from neonatal (P4) and young adult (P60) rats. The cytosolic fractions of both areas were examined by 2-D DIGE, and the plasma membrane-enriched fraction of the IC was analyzed via iTRAQ. iTRAQ showed a regulation in 34% of the quantified proteins. DIGE revealed 12% regulated spots in both the SOC and IC and, thus, numeric congruency. Although regulation in KEGG pathways displayed a similar pattern in both areas, only 13 of 71 regulated DIGE proteins were regulated in common, implying major area-specific differences. 89% of regulated glycolysis/gluconeogenesis and citrate cycle proteins were up-regulated in the SOC or IC, suggesting a higher energy demand in adulthood. Seventeen cytoskeleton proteins were regulated, consistent with complex morphological reorganization between P4 and P60. Fourteen were uniquely regulated in the SOC, providing further evidence for area-specific differences. Altogether, we provide the first elaborate catalog of proteins involved in auditory brainstem development, several of them possibly of particular developmental relevance.
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Affiliation(s)
- Bernd Kaltwaßer
- Animal Physiology Group, Department of Biology, University of Kaiserslautern, Kaiserslautern, Germany
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Kalinina TS, Shishkina GT, Dygalo NN. Induction of Tyrosine Hydroxylase Gene Expression by Glucocorticoids in the Perinatal Rat Brain is Age-Dependent. Neurochem Res 2012; 37:811-8. [DOI: 10.1007/s11064-011-0676-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 12/09/2011] [Accepted: 12/15/2011] [Indexed: 11/30/2022]
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A proteomic analysis of PKCε targets in astrocytes: implications for astrogliosis. Amino Acids 2010; 40:641-51. [PMID: 20640460 DOI: 10.1007/s00726-010-0691-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Accepted: 07/06/2010] [Indexed: 12/16/2022]
Abstract
Astrocytes are glial cells in the central nervous system (CNS) that play key roles in brain physiology, controlling processes, such as neurogenesis, brain energy metabolism and synaptic transmission. Recently, immune functions have also been demonstrated in astrocytes, influencing neuronal survival in the course of neuroinflammatory pathologies. In this regard, PKCepsilon (PKCε) is a protein kinase with an outstanding role in inflammation. Our previous findings indicating that PKCε regulates voltage-dependent calcium channels as well as morphological stellation imply that this kinase controls multiple signalling pathways within astrocytes, including those implicated in activation of immune functions. The present study applies proteomics to investigate new protein targets of PKCε in astrocytes. Primary astrocyte cultures infected with an adenovirus that expresses constitutively active PKCε were compared with infection controls. Two-dimensional gel electrophoresis clearly detected 549 spots in cultured astrocytes, and analysis of differential protein expression revealed 18 spots regulated by PKCε. Protein identification by mass spectrometry (nano-LC-ESI-MS/MS) showed that PKCε targets molecules with heterogeneous functions, including chaperones, cytoskeletal components and proteins implicated in metabolism and signalling. These results support the notion that PKCε is involved in astrocyte activation; also suggesting that multiple astrocyte-dependent processes are regulated by PKCε, including those associated to neuroinflammation.
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Zheng JF, Patil SS, Chen WQ, An W, He JQ, Höger H, Lubec G. Hippocampal protein levels related to spatial memory are different in the Barnes maze and in the multiple T-maze. J Proteome Res 2010; 8:4479-86. [PMID: 19650667 DOI: 10.1021/pr9002596] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Multiple T-maze (MTM) and the Barnes maze (BM) are land mazes used for the evaluation of spatial memory. The observation that mice are performing differently in individual mazes made us test the hypothesis that differences in cognitive performances in the two land mazes would be accompanied by differences in hippocampal protein levels. C57BL/6J mice were tested in the BM and in the MTM, hippocampi were extirpated 6 h following the probe trials each, and proteins were extracted for gel-based proteomic analysis. Mice learned the task in both paradigms. Levels of hippocampal proteins from several pathways including signaling, chaperone, and metabolic cascades were significantly different between the two spatial memory tasks. Protein levels were linked to spatial memory specifically as yoked controls were used.
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Affiliation(s)
- Jun-Fang Zheng
- Department of Pediatrics, Medical University of Vienna, Vienna, Austria
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Chen WQ, Siegel N, Li L, Pollak A, Hengstschläger M, Lubec G. Variations of Protein Levels in Human Amniotic Fluid Stem Cells CD117/2 Over Passages 5−25. J Proteome Res 2009; 8:5285-95. [DOI: 10.1021/pr900630s] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wei-Qiang Chen
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
| | - Nicol Siegel
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
| | - Lin Li
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
| | - Arnold Pollak
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
| | - Markus Hengstschläger
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
| | - Gert Lubec
- Department of Pediatrics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria, and Department of Medical Genetics, Medical University of Vienna, Währinger Gürtel 18, 1090 Vienna, Austria
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