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Pelech S, Jelinkova L, Susor A, Zhang H, Shi X, Pavlok A, Kubelka M, Kovarova H. Antibody Microarray Analyses of Signal Transduction Protein Expression and Phosphorylation during Porcine Oocyte Maturation. J Proteome Res 2008; 7:2860-71. [DOI: 10.1021/pr800082a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven Pelech
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Lucie Jelinkova
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Andrej Susor
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Hong Zhang
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Xiaoqing Shi
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Antonin Pavlok
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Michal Kubelka
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
| | - Hana Kovarova
- Kinexus Bioinformatics Corporation, Suite 1, 8755 Ash Street, Vancouver, BC, Canada V6P 6T3, Department of Medicine, University of British Columbia, Vancouver, BC, Canada, and Department of Reproductive and Developmental Biology, Institute of Animal Physiology and Genetics, Rumburska 89, Libechov, Czech Republic
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Oi S, Haneda T, Osaki J, Kashiwagi Y, Nakamura Y, Kawabe J, Kikuchi K. Lovastatin prevents angiotensin II-induced cardiac hypertrophy in cultured neonatal rat heart cells. Eur J Pharmacol 1999; 376:139-48. [PMID: 10440099 DOI: 10.1016/s0014-2999(99)00282-4] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Angiotensin II activates p21ras, and mediates cardiac hypertrophic growth through the type 1 angiotensin II receptor in cardiac myocytes. An inhibitor of 3-hydroxy-3-methyglutaryl-coenzyme A (HMG-CoA) reductase has been shown to block the post-translational farnesylation of p21ras and inhibit protein synthesis in several cell types. Primary cultures of neonatal cardiac myocytes were used to determine whether HMG-CoA reductase inhibitors, lovastatin, simvastatin and pravastatin inhibit the angiotensin II-induced hypertrophic growth. Angiotensin II (10(-6) M) significantly increased protein-DNA ratio, RNA-DNA ratio, ratios of protein synthesis and mitogen-activated protein (MAP) kinase activity. Lipid-soluble HMG-CoA reductase inhibitors, lovastatin (10(-6) M) and simvastatin (10(-6) M) partially and significantly inhibited the angiotensin II-induced increases in these parameters, but a water-soluble HMG-CoA reductase inhibitor, pravastatin (10(-6) M) did not. Mevalonate (10(-4) M) overcame the inhibitory effects of lovastatin and simvastatin on angiotensin II-induced increases in these parameters. A selective protein kinase C inhibitor, calphostin C (10(-6) M) partially and significantly prevented angiotensin II-induced increases in these parameters, and treatment with both lovastatin and calphostin C inhibited completely. Angiotensin II increased p21ras activity and membrane association, and lovastatin inhibited them. These studies demonstrate that a lipid-soluble HMG-CoA reductase inhibitor, lovastatin, may prevent angiotensin II-induced cardiac hypertrophy, at least in part, through p21ras/MAP kinase pathway, which is linked to mevalonate metabolism.
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Affiliation(s)
- S Oi
- First Department of Internal Medicine, Asahikawa Medical College, Japan
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Moriguchi T, Gotoh Y, Nishida E. Activation of two isoforms of mitogen-activated protein kinase kinase in response to epidermal growth factor and nerve growth factor. Eur J Biochem 1995; 234:32-8. [PMID: 8529659 DOI: 10.1111/j.1432-1033.1995.032_c.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Mitogen-activated protein kinase kinase (MAPKK) is a dual-specificity protein kinase which phosphorylates and activates mitogen-activated protein kinase (MAPK). cDNAs encoding two isoforms of MAPKK, MAPKK1 and MAPKK2 (also known as MEK1 and MEK2), have been cloned in mammalian cells. To analyze the characteristics of MAPKK1 and MAPKK2 individually, we have produced specific anti-MAPKK serum against each isoform. MAPKK1 and MAPKK2 have apparent molecular masses of 45 kDa and 47 kDa, respectively, on SDS/polyacrylamide gel electrophoresis. In mouse tissues, MAPKK1 was highly enriched in brain, while MAPKK2 was present relatively evenly. In rat fibroblastic 3Y1 cells, epidermal growth factor (EGF) treatment induced activation of both MAPKK1 and MAPKK2. Immunoprecipitation experiments have shown that the time courses of activation and deactivation of both isoforms of MAPKK were superimposed. In PC12 cells, both MAPKK1 and MAPKK2 were activated in response to nerve growth factor (NGF) as well as EGF, and the time courses of activation and deactivation of both isoforms were indistinguishable from each other in the NGF-stimulated cells and also in the EGF-stimulated cells. Furthermore, localization of both MAPKK1 and MAPKK2 in the cytoplasm was unchanged in response to EGF and NGF. Thus, the same or quite similar mechanisms may operate in the regulation of the activation and deactivation of two isoforms of MAPKK, and both kinases might have redundant functions when expressed in the same cell.
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Affiliation(s)
- T Moriguchi
- Department of Genetics and Molecular Biology, Kyoto University, Japan
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Abstract
The molecular cloning of new neuroactive growth factors and their receptors has greatly enhanced our understanding of important interactions among receptors and signaling molecules. These studies have begun to illuminate some of the mechanisms that allow for specificity in neuronal signaling. Model cell systems, such as the PC-12 pheochromocytoma cell line, express receptors for these different neurotrophic factors, leading to comparisons of signaling pathways for these factors. Upon binding their ligands, these receptors undergo phosphorylation on tyrosine residues, which directs their interaction with signaling proteins containing src homology (SH2) domains, sequences that mediate associations with tyrosine-phosphorylated proteins. These SH2 proteins translate the tyrosine kinase activity of receptors into downstream events that result in the specific cellular response. Investigations such as these have revealed that molecular specificity in signaling pathways may arise from combinatorial diversity in interactions between receptors and key regulatory proteins.
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Affiliation(s)
- A R Saltiel
- Department of Signal Transduction, Parke-Davis Pharmaceutical Research Division of Warner-Lambert Co., Ann Arbor, Michigan 48105
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