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Adolph SK, DeLotto R, Nielsen FC, Christiansen J. Embryonic expression of Drosophila IMP in the developing CNS and PNS. Gene Expr Patterns 2008; 9:138-43. [PMID: 19111951 DOI: 10.1016/j.gep.2008.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 11/28/2008] [Accepted: 12/03/2008] [Indexed: 01/08/2023]
Abstract
Drosophila IMP (dIMP) is related to the vertebrate RNA-binding proteins IMP1-3, ZBP1, Vg1RBP and CRD-BP, which are involved in RNA regulatory processes such as translational repression, localization and stabilization. The proteins are expressed in many fetal tissues, including the developing nervous system, and IMP up-regulation in solid tumors correlates with a high metastatic potential and poor prognosis. In this study, we used immunohistochemistry and live-imaging of an endogenous promoter-driven GFP-dIMP fusion protein to reveal the expression pattern of dIMP protein throughout embryogenesis. In the cellular blastoderm, immunoreactivity was seen in the entire cell-layer, where it was localized apically to the nucleus, and in the pole cells. Later, the GFP-dIMP fusion protein appeared in the developing central nervous system, both in the brain and in the ventral nerve cord. In the peripheral nervous system, immunoreactivity was detected in both neurons and accessory cells of chordotonal and external sensory organs.
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Affiliation(s)
- Sidsel Kramshøj Adolph
- Department of Biology, University of Copenhagen, Ole Maaloes Vej 5, DK-2200 Copenhagen N, Denmark.
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Gagné JP, Éthier C, Gagné P, Mercier G, Bonicalzi MÈ, Mes-Masson AM, Droit A, Winstall E, Isabelle M, Poirier GG. Comparative proteome analysis of human epithelial ovarian cancer. Proteome Sci 2007; 5:16. [PMID: 17892554 PMCID: PMC2072939 DOI: 10.1186/1477-5956-5-16] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2007] [Accepted: 09/24/2007] [Indexed: 01/10/2023] Open
Abstract
Background Epithelial ovarian cancer is a devastating disease associated with low survival prognosis mainly because of the lack of early detection markers and the asymptomatic nature of the cancer until late stage. Using two complementary proteomics approaches, a differential protein expression profile was carried out between low and highly transformed epithelial ovarian cancer cell lines which realistically mimic the phenotypic changes observed during evolution of a tumour metastasis. This investigation was aimed at a better understanding of the molecular mechanisms underlying differentiation, proliferation and neoplastic progression of ovarian cancer. Results The quantitative profiling of epithelial ovarian cancer model cell lines TOV-81D and TOV-112D generated using iTRAQ analysis and two-dimensional electrophoresis coupled to liquid chromatography tandem mass spectrometry revealed some proteins with altered expression levels. Several of these proteins have been the object of interest in cancer research but others were unrecognized as differentially expressed in a context of ovarian cancer. Among these, series of proteins involved in transcriptional activity, cellular metabolism, cell adhesion or motility and cytoskeleton organization were identified, suggesting their possible role in the emergence of oncogenic pathways leading to aggressive cellular behavior. Conclusion The differential protein expression profile generated by the two proteomics approaches combined to complementary characterizations studies will open the way to more exhaustive and systematic representation of the disease and will provide valuable information that may be helpful to uncover the molecular mechanisms related to epithelial ovarian cancer.
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Affiliation(s)
- Jean-Philippe Gagné
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
- CNRS UMR6061 Université de Rennes 1, Groupe Cycle Cellulaire, Université de Rennes 1, Faculté de Médecine, 2 Avenue du Pr Léon Bernard, CS 3417, Rennes cedex, France
| | - Chantal Éthier
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Pierre Gagné
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Geneviève Mercier
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Marie-Ève Bonicalzi
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CHUM)-Hôpital Notre-Dame and Institut du cancer de Montréal, 1560 rue Sherbrooke Est, Montréal, Québec, H2L 4M1, Canada
| | - Arnaud Droit
- Proteomics Platform, Québec Genomic Center, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Eric Winstall
- Proteomics Platform, Québec Genomic Center, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Maxim Isabelle
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
| | - Guy G Poirier
- Health and Environment Unit, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
- Proteomics Platform, Québec Genomic Center, Laval University Medical Research Center, CHUQ, Faculty of Medicine, Laval University, 2705, Boulevard Laurier, Ste-Foy, Québec, G1V 4G2, Canada
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