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  • 1
    Publication Date: 2008-10-25
    Description: BAX is a pro-apoptotic protein of the BCL-2 family that is stationed in the cytosol until activated by a diversity of stress stimuli to induce cell death. Anti-apoptotic proteins such as BCL-2 counteract BAX-mediated cell death. Although an interaction site that confers survival functionality has been defined for anti-apoptotic proteins, an activation site has not been identified for BAX, rendering its explicit trigger mechanism unknown. We previously developed stabilized alpha-helix of BCL-2 domains (SAHBs) that directly initiate BAX-mediated mitochondrial apoptosis. Here we demonstrate by NMR analysis that BIM SAHB binds BAX at an interaction site that is distinct from the canonical binding groove characterized for anti-apoptotic proteins. The specificity of the human BIM-SAHB-BAX interaction is highlighted by point mutagenesis that disrupts functional activity, confirming that BAX activation is initiated at this novel structural location. Thus, we have now defined a BAX interaction site for direct activation, establishing a new target for therapeutic modulation of apoptosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597110/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597110/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gavathiotis, Evripidis -- Suzuki, Motoshi -- Davis, Marguerite L -- Pitter, Kenneth -- Bird, Gregory H -- Katz, Samuel G -- Tu, Ho-Chou -- Kim, Hyungjin -- Cheng, Emily H-Y -- Tjandra, Nico -- Walensky, Loren D -- 5P01CA92625/CA/NCI NIH HHS/ -- 5R01CA125562/CA/NCI NIH HHS/ -- 5R01CA50239/CA/NCI NIH HHS/ -- K99 HL095929/HL/NHLBI NIH HHS/ -- K99 HL095929-01A1/HL/NHLBI NIH HHS/ -- K99 HL095929-02/HL/NHLBI NIH HHS/ -- R00 HL095929/HL/NHLBI NIH HHS/ -- R01 CA050239/CA/NCI NIH HHS/ -- R01 CA125562/CA/NCI NIH HHS/ -- R01 CA125562-02/CA/NCI NIH HHS/ -- Intramural NIH HHS/ -- England -- Nature. 2008 Oct 23;455(7216):1076-81. doi: 10.1038/nature07396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Oncology and the Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18948948" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Apoptosis ; Apoptosis Regulatory Proteins/chemistry/metabolism ; BH3 Interacting Domain Death Agonist Protein/metabolism ; Cell Line ; *Gene Expression Regulation ; Humans ; Membrane Proteins/chemistry/metabolism ; Mice ; Mutagenesis, Site-Directed ; Mutation/genetics ; Nuclear Magnetic Resonance, Biomolecular ; Protein Binding ; Proto-Oncogene Proteins/chemistry/metabolism ; Sequence Alignment ; bcl-2-Associated X Protein/chemistry/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2008-06-13
    Description: MicroRNAs (miRNAs) are small non-coding RNAs that participate in the spatiotemporal regulation of messenger RNA and protein synthesis. Aberrant miRNA expression leads to developmental abnormalities and diseases, such as cardiovascular disorders and cancer; however, the stimuli and processes regulating miRNA biogenesis are largely unknown. The transforming growth factor beta (TGF-beta) and bone morphogenetic protein (BMP) family of growth factors orchestrates fundamental biological processes in development and in the homeostasis of adult tissues, including the vasculature. Here we show that induction of a contractile phenotype in human vascular smooth muscle cells by TGF-beta and BMPs is mediated by miR-21. miR-21 downregulates PDCD4 (programmed cell death 4), which in turn acts as a negative regulator of smooth muscle contractile genes. Surprisingly, TGF-beta and BMP signalling promotes a rapid increase in expression of mature miR-21 through a post-transcriptional step, promoting the processing of primary transcripts of miR-21 (pri-miR-21) into precursor miR-21 (pre-miR-21) by the DROSHA (also known as RNASEN) complex. TGF-beta- and BMP-specific SMAD signal transducers are recruited to pri-miR-21 in a complex with the RNA helicase p68 (also known as DDX5), a component of the DROSHA microprocessor complex. The shared cofactor SMAD4 is not required for this process. Thus, regulation of miRNA biogenesis by ligand-specific SMAD proteins is critical for control of the vascular smooth muscle cell phenotype and potentially for SMAD4-independent responses mediated by the TGF-beta and BMP signalling pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2653422/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2653422/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, Brandi N -- Hilyard, Aaron C -- Lagna, Giorgio -- Hata, Akiko -- HD042149/HD/NICHD NIH HHS/ -- HL082854/HL/NHLBI NIH HHS/ -- HL086572/HL/NHLBI NIH HHS/ -- R01 HD042149/HD/NICHD NIH HHS/ -- R01 HD042149-05/HD/NICHD NIH HHS/ -- R01 HL082854/HL/NHLBI NIH HHS/ -- R01 HL082854-03/HL/NHLBI NIH HHS/ -- R21 HL086572/HL/NHLBI NIH HHS/ -- R21 HL086572-02/HL/NHLBI NIH HHS/ -- England -- Nature. 2008 Jul 3;454(7200):56-61. doi: 10.1038/nature07086. Epub 2008 Jun 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18548003" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis Regulatory Proteins/metabolism ; Bone Morphogenetic Protein 4 ; Bone Morphogenetic Proteins/metabolism/pharmacology ; Breast Neoplasms/genetics ; Cell Line ; Cercopithecus aethiops ; DEAD-box RNA Helicases/metabolism ; Gene Expression Regulation/drug effects ; Humans ; Ligands ; Mice ; MicroRNAs/biosynthesis/*metabolism ; Muscle, Smooth/metabolism ; Phenotype ; Protein Binding ; *RNA Processing, Post-Transcriptional ; RNA-Binding Proteins/metabolism ; Ribonuclease III/*metabolism ; Signal Transduction/drug effects ; Smad Proteins/*metabolism ; Transforming Growth Factor beta/metabolism/pharmacology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2009-11-13
    Description: Direct inhibition of transcription factor complexes remains a central challenge in the discipline of ligand discovery. In general, these proteins lack surface involutions suitable for high-affinity binding by small molecules. Here we report the design of synthetic, cell-permeable, stabilized alpha-helical peptides that target a critical protein-protein interface in the NOTCH transactivation complex. We demonstrate that direct, high-affinity binding of the hydrocarbon-stapled peptide SAHM1 prevents assembly of the active transcriptional complex. Inappropriate NOTCH activation is directly implicated in the pathogenesis of several disease states, including T-cell acute lymphoblastic leukaemia (T-ALL). The treatment of leukaemic cells with SAHM1 results in genome-wide suppression of NOTCH-activated genes. Direct antagonism of the NOTCH transcriptional program causes potent, NOTCH-specific anti-proliferative effects in cultured cells and in a mouse model of NOTCH1-driven T-ALL.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951323/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951323/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moellering, Raymond E -- Cornejo, Melanie -- Davis, Tina N -- Del Bianco, Cristina -- Aster, Jon C -- Blacklow, Stephen C -- Kung, Andrew L -- Gilliland, D Gary -- Verdine, Gregory L -- Bradner, James E -- 5T32GM007598/GM/NIGMS NIH HHS/ -- N01-CO-12400/CO/NCI NIH HHS/ -- P01 CA119070/CA/NCI NIH HHS/ -- P01 CA119070-049001/CA/NCI NIH HHS/ -- R01 CA092433/CA/NCI NIH HHS/ -- R01 CA092433-06A2/CA/NCI NIH HHS/ -- R56 CA092433/CA/NCI NIH HHS/ -- R56 CA092433-06A1/CA/NCI NIH HHS/ -- T32 GM007598/GM/NIGMS NIH HHS/ -- T32 GM007598-30/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Nov 12;462(7270):182-8. doi: 10.1038/nature08543.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry & Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19907488" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Cell Line, Tumor ; Cell Membrane Permeability ; Cell Proliferation/drug effects ; DNA-Binding Proteins/chemistry/metabolism ; Disease Models, Animal ; Drosophila Proteins/chemistry ; Gene Expression Regulation, Neoplastic/drug effects ; Genome/drug effects/genetics ; Humans ; Immunoglobulin J Recombination Signal Sequence-Binding Protein/metabolism ; Mice ; Models, Molecular ; Nuclear Proteins/chemistry ; Peptides/chemical synthesis/chemistry/metabolism/*pharmacology ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy/genetics/pathology ; Protein Binding/drug effects ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptor, Notch1/*antagonists & inhibitors/chemistry/metabolism ; Signal Transduction/drug effects ; Substrate Specificity ; Transcription Factors/chemistry/metabolism ; Transcriptional Activation/*drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2007-04-14
    Description: The pre-B cell receptor (pre-BCR) serves as a checkpoint in B cell development. In the 2.7 angstrom structure of a human pre-BCR Fab-like fragment, consisting of an antibody heavy chain (HC) paired with the surrogate light chain, the "unique regions" of VpreB and lambda5 replace the complementarity-determining region 3 (CDR3) loop of an antibody light chain and appear to "probe" the HC CDR3, potentially influencing the selection of the antibody repertoire. Biochemical analysis indicates that the pre-BCR is impaired in its ability to recognize antigen, which, together with electron microscopic visualization of a pre-BCR dimer, suggests ligand-independent oligomerization as the likely signaling mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bankovich, Alexander J -- Raunser, Stefan -- Juo, Z Sean -- Walz, Thomas -- Davis, Mark M -- Garcia, K Christopher -- T32 AI007290/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2007 Apr 13;316(5822):291-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17431183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Complementarity Determining Regions/chemistry/physiology ; Crystallography, X-Ray ; Humans ; Immunoglobulin Heavy Chains/chemistry/physiology ; Immunoglobulin Light Chains/chemistry/physiology ; Immunoglobulin Light Chains, Surrogate ; Membrane Glycoproteins/*chemistry/physiology/ultrastructure ; Mice ; Models, Molecular ; Pre-B Cell Receptors ; Protein Conformation ; Receptors, Antigen, B-Cell/*chemistry/physiology/ultrastructure ; Recombinant Proteins ; Structure-Activity Relationship
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2008-12-06
    Description: A high-fat diet causes activation of the regulatory protein c-Jun NH2-terminal kinase 1 (JNK1) and triggers development of insulin resistance. JNK1 is therefore a potential target for therapeutic treatment of metabolic syndrome. We explored the mechanism of JNK1 signaling by engineering mice in which the Jnk1 gene was ablated selectively in adipose tissue. JNK1 deficiency in adipose tissue suppressed high-fat diet-induced insulin resistance in the liver. JNK1-dependent secretion of the inflammatory cytokine interleukin-6 by adipose tissue caused increased expression of liver SOCS3, a protein that induces hepatic insulin resistance. Thus, JNK1 activation in adipose tissue can cause insulin resistance in the liver.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2643026/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2643026/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sabio, Guadalupe -- Das, Madhumita -- Mora, Alfonso -- Zhang, Zhiyou -- Jun, John Y -- Ko, Hwi Jin -- Barrett, Tamera -- Kim, Jason K -- Davis, Roger J -- DK52530/DK/NIDDK NIH HHS/ -- R01 CA065861/CA/NCI NIH HHS/ -- R01 CA065861-14/CA/NCI NIH HHS/ -- R01 DK080756/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Dec 5;322(5907):1539-43. doi: 10.1126/science.1160794.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of Massachusetts Medical School, Worcester, MA 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19056984" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/enzymology/*metabolism ; Adipose Tissue/enzymology/metabolism ; Animals ; Dietary Fats/administration & dosage ; Enzyme Activation ; Glucose/metabolism ; Insulin/metabolism ; Insulin Receptor Substrate Proteins/metabolism ; *Insulin Resistance ; Interleukin-6/administration & dosage/metabolism ; Liver/*metabolism ; MAP Kinase Signaling System ; Mice ; Mitogen-Activated Protein Kinase 8/deficiency/genetics/*metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-akt/metabolism ; *Signal Transduction ; *Stress, Physiological ; Suppressor of Cytokine Signaling Proteins/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 2009-03-03
    Description: Amyotrophic lateral sclerosis (ALS) is a fatal degenerative motor neuron disorder. Ten percent of cases are inherited; most involve unidentified genes. We report here 13 mutations in the fused in sarcoma/translated in liposarcoma (FUS/TLS) gene on chromosome 16 that were specific for familial ALS. The FUS/TLS protein binds to RNA, functions in diverse processes, and is normally located predominantly in the nucleus. In contrast, the mutant forms of FUS/TLS accumulated in the cytoplasm of neurons, a pathology that is similar to that of the gene TAR DNA-binding protein 43 (TDP43), whose mutations also cause ALS. Neuronal cytoplasmic protein aggregation and defective RNA metabolism thus appear to be common pathogenic mechanisms involved in ALS and possibly in other neurodegenerative disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kwiatkowski, T J Jr -- Bosco, D A -- Leclerc, A L -- Tamrazian, E -- Vanderburg, C R -- Russ, C -- Davis, A -- Gilchrist, J -- Kasarskis, E J -- Munsat, T -- Valdmanis, P -- Rouleau, G A -- Hosler, B A -- Cortelli, P -- de Jong, P J -- Yoshinaga, Y -- Haines, J L -- Pericak-Vance, M A -- Yan, J -- Ticozzi, N -- Siddique, T -- McKenna-Yasek, D -- Sapp, P C -- Horvitz, H R -- Landers, J E -- Brown, R H Jr -- New York, N.Y. -- Science. 2009 Feb 27;323(5918):1205-8. doi: 10.1126/science.1166066.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology, Massachusetts General Hospital, 114 16th Street, Charlestown, MA 02129, USA. tkwiatkowski@partners.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19251627" target="_blank"〉PubMed〈/a〉
    Keywords: Age of Onset ; Amino Acid Substitution ; Amyotrophic Lateral Sclerosis/*genetics/metabolism/pathology ; Animals ; Brain/pathology ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Chromosomes, Human, Pair 16/*genetics ; Cytoplasm/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Exons ; Female ; Humans ; Male ; Mice ; Motor Neurons/chemistry/metabolism/ultrastructure ; Mutant Proteins/chemistry/genetics/metabolism ; *Mutation, Missense ; Neurons/metabolism/ultrastructure ; RNA/metabolism ; RNA-Binding Protein FUS/chemistry/*genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Sequence Analysis, DNA ; Spinal Cord/pathology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 2005-10-15
    Description: Tourette's syndrome (TS) is a genetically influenced developmental neuropsychiatric disorder characterized by chronic vocal and motor tics. We studied Slit and Trk-like 1 (SLITRK1) as a candidate gene on chromosome 13q31.1 because of its proximity to a de novo chromosomal inversion in a child with TS. Among 174 unrelated probands, we identified a frameshift mutation and two independent occurrences of the identical variant in the binding site for microRNA hsa-miR-189. These variants were absent from 3600 control chromosomes. SLITRK1 mRNA and hsa-miR-189 showed an overlapping expression pattern in brain regions previously implicated in TS. Wild-type SLITRK1, but not the frameshift mutant, enhanced dendritic growth in primary neuronal cultures. Collectively, these findings support the association of rare SLITRK1 sequence variants with TS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abelson, Jesse F -- Kwan, Kenneth Y -- O'Roak, Brian J -- Baek, Danielle Y -- Stillman, Althea A -- Morgan, Thomas M -- Mathews, Carol A -- Pauls, David L -- Rasin, Mladen-Roko -- Gunel, Murat -- Davis, Nicole R -- Ercan-Sencicek, A Gulhan -- Guez, Danielle H -- Spertus, John A -- Leckman, James F -- Dure, Leon S 4th -- Kurlan, Roger -- Singer, Harvey S -- Gilbert, Donald L -- Farhi, Anita -- Louvi, Angeliki -- Lifton, Richard P -- Sestan, Nenad -- State, Matthew W -- K23 RR16118/RR/NCRR NIH HHS/ -- R01 NS054273/NS/NINDS NIH HHS/ -- R01 NS43520/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2005 Oct 14;310(5746):317-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Child Study Center, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16224024" target="_blank"〉PubMed〈/a〉
    Keywords: 3' Untranslated Regions ; Adolescent ; Animals ; Attention Deficit Disorder with Hyperactivity/complications/genetics ; Brain/metabolism ; Child ; Child, Preschool ; Chromosome Inversion ; Chromosome Mapping ; *Chromosomes, Human, Pair 13 ; Dna ; DNA Mutational Analysis ; Female ; Frameshift Mutation ; Humans ; In Situ Hybridization, Fluorescence ; Male ; Membrane Proteins/*genetics ; Mice ; *Mutation ; Nerve Tissue Proteins/*genetics ; Pedigree ; Sequence Analysis, DNA ; Tourette Syndrome/complications/*genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2006-08-05
    Description: Immunity-related p47 guanosine triphosphatases (IRG) play a role in defense against intracellular pathogens. We found that the murine Irgm1 (LRG-47) guanosine triphosphatase induced autophagy and generated large autolysosomal organelles as a mechanism for the elimination of intracellular Mycobacterium tuberculosis. We also identified a function for a human IRG protein in the control of intracellular pathogens and report that the human Irgm1 ortholog, IRGM, plays a role in autophagy and in the reduction of intracellular bacillary load.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Singh, Sudha B -- Davis, Alexander S -- Taylor, Gregory A -- Deretic, Vojo -- AI42999/AI/NIAID NIH HHS/ -- AI45148/AI/NIAID NIH HHS/ -- AI57831/AI/NIAID NIH HHS/ -- R01 AI057831/AI/NIAID NIH HHS/ -- T32 AI007538/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1438-41. Epub 2006 Aug 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16888103" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Autophagy ; Cell Line ; Cytosol/metabolism ; GTP-Binding Proteins/genetics/*physiology ; HeLa Cells ; Humans ; Interferon-gamma/immunology ; Lysosomes/metabolism/microbiology/ultrastructure ; Macrophages/*immunology/*microbiology ; Mice ; Microbial Viability ; Microtubule-Associated Proteins/metabolism ; Mycobacterium bovis/*immunology/physiology ; Phagosomes/metabolism/microbiology/*ultrastructure ; RNA, Small Interfering ; Transfection ; Vacuoles/metabolism/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2008-05-03
    Description: Glycogen synthase kinase 3beta (GSK3beta) is involved in metabolism, neurodegeneration, and cancer. Inhibition of GSK3beta activity is the primary mechanism that regulates this widely expressed active kinase. Although the protein kinase Akt inhibits GSK3beta by phosphorylation at the N terminus, preventing Akt-mediated phosphorylation does not affect the cell-survival pathway activated through the GSK3beta substrate beta-catenin. Here, we show that p38 mitogen-activated protein kinase (MAPK) also inactivates GSK3beta by direct phosphorylation at its C terminus, and this inactivation can lead to an accumulation of beta-catenin. p38 MAPK-mediated phosphorylation of GSK3beta occurs primarily in the brain and thymocytes. Activation of beta-catenin-mediated signaling through GSK3beta inhibition provides a potential mechanism for p38 MAPK-mediated survival in specific tissues.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597039/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597039/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, Tina M -- Pedraza-Alva, Gustavo -- Deng, Bin -- Wood, C David -- Aronshtam, Alexander -- Clements, James L -- Sabio, Guadalupe -- Davis, Roger J -- Matthews, Dwight E -- Doble, Bradley -- Rincon, Mercedes -- P20 RR021905/RR/NCRR NIH HHS/ -- P20 RR15557/RR/NCRR NIH HHS/ -- P20 RR16462/RR/NCRR NIH HHS/ -- R01 AI051454/AI/NIAID NIH HHS/ -- R01 AI051454-01A1/AI/NIAID NIH HHS/ -- R01 AI051454-02/AI/NIAID NIH HHS/ -- R01 AI051454-03/AI/NIAID NIH HHS/ -- R01 AI051454-04/AI/NIAID NIH HHS/ -- R01 AI051454-05/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2008 May 2;320(5876):667-70. doi: 10.1126/science.1156037.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine/Immunobiology Program, University of Vermont, Burlington, VT 05405-0068, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18451303" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/enzymology ; Glycogen Synthase Kinase 3/*antagonists & inhibitors/immunology/metabolism ; Humans ; Mice ; Phosphorylation ; Protein Kinase Inhibitors/*metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Serine/metabolism ; Thymus Gland/cytology/enzymology ; beta Catenin/metabolism ; p38 Mitogen-Activated Protein Kinases/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2009-04-04
    Description: Apicomplexan parasites, including Plasmodium falciparum and Toxoplasma gondii (the causative agents of malaria and toxoplasmosis, respectively), are responsible for considerable morbidity and mortality worldwide. These pathogenic protozoa replicate within an intracellular vacuole inside of infected host cells, from which they must escape to initiate a new lytic cycle. By integrating cell biological, pharmacological, and genetic approaches, we provide evidence that both Plasmodium and Toxoplasma hijack host cell calpain proteases to facilitate parasite egress. Immunodepletion or inhibition of calpain-1 in hypotonically lysed and resealed erythrocytes prevented the escape of P. falciparum parasites, which was restored by adding purified calpain-1. Similarly, efficient egress of T. gondii from mammalian fibroblasts was blocked by either small interfering RNA-mediated suppression or genetic deletion of calpain activity and could be restored by genetic complementation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3391539/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3391539/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chandramohanadas, Rajesh -- Davis, Paul H -- Beiting, Daniel P -- Harbut, Michael B -- Darling, Claire -- Velmourougane, Geetha -- Lee, Ming Yeh -- Greer, Peter A -- Roos, David S -- Greenbaum, Doron C -- F32 AI075846/AI/NIAID NIH HHS/ -- F32 AI075846-02/AI/NIAID NIH HHS/ -- F32 AI077268/AI/NIAID NIH HHS/ -- F32 AI077268-02/AI/NIAID NIH HHS/ -- R37 AI028724/AI/NIAID NIH HHS/ -- R37 AI028724-17/AI/NIAID NIH HHS/ -- T32 GM008076/GM/NIGMS NIH HHS/ -- T32 GM008076-24/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 May 8;324(5928):794-7. doi: 10.1126/science.1171085. Epub 2009 Apr 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19342550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calpain/blood/genetics/*metabolism ; Cell Line ; Cell Line, Tumor ; Erythrocytes/*parasitology ; Fibroblasts/parasitology ; Humans ; Leucine/analogs & derivatives/pharmacology ; Life Cycle Stages ; Merozoites/physiology ; Mice ; Mice, Knockout ; Plasmodium falciparum/growth & development/metabolism/*pathogenicity/physiology ; RNA, Small Interfering ; Schizonts/physiology ; Toxoplasma/growth & development/metabolism/*pathogenicity/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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