1
|
Dong R, Li X, Flores AD, Lai KO. The translation initiating factor eIF4E and arginine methylation underlie G3BP1 function in dendritic spine development of neurons. J Biol Chem 2023; 299:105029. [PMID: 37442236 PMCID: PMC10432808 DOI: 10.1016/j.jbc.2023.105029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 07/02/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
Communication between neurons relies on neurotransmission that takes place at synapses. Excitatory synapses are located primarily on dendritic spines that possess diverse morphologies, ranging from elongated filopodia to mushroom-shaped spines. Failure in the proper development of dendritic spines has detrimental consequences on neuronal connectivity, but the molecular mechanism that controls the balance of filopodia and mushroom spines is not well understood. G3BP1 is the key RNA-binding protein that assembles the stress granules in non-neuronal cells to adjust protein synthesis upon exogenous stress. Emerging evidence suggests that the biological significance of G3BP1 extends beyond its role in stress response, especially in the nervous system. However, the mechanism underlying the regulation and function of G3BP1 in neurons remains elusive. Here we found that G3BP1 suppresses protein synthesis and binds to the translation initiation factor eIF4E via its NTF2-like domain. Notably, the over-production of filopodia caused by G3BP1 depletion can be alleviated by blocking the formation of the translation initiation complex. We further found that the interaction of G3BP1 with eIF4E is regulated by arginine methylation. Knockdown of the protein arginine methyltransferase PRMT8 leads to elevated protein synthesis and filopodia production, which is reversed by the expression of methylation-mimetic G3BP1. Our study, therefore, reveals arginine methylation as a key regulatory mechanism of G3BP1 during dendritic spine morphogenesis and identifies eIF4E as a novel downstream target of G3BP1 in neuronal development independent of stress response.
Collapse
Affiliation(s)
- Rui Dong
- Department of Neuroscience, City University of Hong Kong, Hong Kong, China
| | - Xuejun Li
- Department of Neuroscience, City University of Hong Kong, Hong Kong, China; Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong, China
| | - Angelo D Flores
- Department of Neuroscience, City University of Hong Kong, Hong Kong, China
| | - Kwok-On Lai
- Department of Neuroscience, City University of Hong Kong, Hong Kong, China; Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong, China.
| |
Collapse
|
2
|
Megdiche S, Mastrangelo S, Ben Hamouda M, Lenstra JA, Ciani E. A Combined Multi-Cohort Approach Reveals Novel and Known Genome-Wide Selection Signatures for Wool Traits in Merino and Merino-Derived Sheep Breeds. Front Genet 2019; 10:1025. [PMID: 31708969 PMCID: PMC6824410 DOI: 10.3389/fgene.2019.01025] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 09/24/2019] [Indexed: 12/24/2022] Open
Abstract
Merino sheep represents a valuable genetic resource worldwide. In this study, we investigated selection signatures in Merino (and Merino-derived) sheep breeds using genome-wide SNP data and two different approaches: a classical FST-outlier method and an approach based on the analysis of local ancestry in admixed populations. In order to capture the most reliable signals, we adopted a combined, multi-cohort approach. In particular, scenarios involving four Merino breeds (Spanish Merino, Australian Merino, Chinese Merino, and Sopravissana) were tested via the local ancestry approach, while nine pair-wise breed comparisons contrasting the above breeds, as well as the Gentile di Puglia breed, with non-Merino breeds from the same geographic area were tested via the FST-outlier method. Signals observed using both methods were compared with genome-wide patterns of distribution of runs of homozygosity (ROH) islands. Novel and known selection signatures were detected. The most reliable signals were observed on OAR 3 (MSRB3 and LEMD3), OAR10 (FRY and RXFP2), OAR 13 (RALY), OAR17 (FAM101A), and OAR18 (NFKBIA, SEC23A, and PAX9). All the above overlapped with known QTLs for wool traits, and evidences from the literature of their involvement in skin/hair/wool biology, as well as gene network analysis, further corroborated these results. The signal on OAR10 also contains well known evidence for association with horn morphology and polledness. More elusive biological evidences of association with the Merino phenotype were observed for a number of other genes, notably LOC101120019 and TMEM132B (OAR17), LOC105609948 (OAR3), LOC101110773 (OAR10), and EIF2S2 (OAR17). Taken together, the above results further contribute to decipher the genetic basis underlying the Merino phenotype.
Collapse
Affiliation(s)
- Sami Megdiche
- Départment des Ressources Animales, Agroalimentaire et Développement Rural, Institut Supérieur Agronomique de Chott-Mariem, Université de Sousse, Sousse, Tunisia
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, University of Bari “Aldo Moro,”Bari, Italy
| | - Salvatore Mastrangelo
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, University of Palermo, Palermo, Italy
| | | | | | - Elena Ciani
- Dipartimento di Bioscienze, Biotecnologie e Biofarmaceutica, University of Bari “Aldo Moro,”Bari, Italy
| |
Collapse
|
3
|
Yamamoto A, Hester J, Macklin PS, Kawai K, Uchiyama M, Biggs D, Bishop T, Bull K, Cheng X, Cawthorne E, Coleman ML, Crockford TL, Davies B, Dow LE, Goldin R, Kranc K, Kudo H, Lawson H, McAuliffe J, Milward K, Scudamore CL, Soilleux E, Issa F, Ratcliffe PJ, Pugh CW. Systemic silencing of PHD2 causes reversible immune regulatory dysfunction. J Clin Invest 2019; 129:3640-3656. [PMID: 31162141 PMCID: PMC6715380 DOI: 10.1172/jci124099] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 05/29/2019] [Indexed: 12/28/2022] Open
Abstract
Physiological effects of cellular hypoxia are sensed by prolyl hydroxylase (PHD) enzymes which regulate HIFs. Genetic interventions on HIF/PHD pathways reveal multiple phenotypes that extend the known biology of hypoxia. Recent studies unexpectedly implicate HIF in aspects of multiple immune and inflammatory pathways. However such studies are often limited by systemic lethal effects and/or use tissue-specific recombination systems, which are inherently irreversible, un-physiologically restricted and difficult to time. To study these processes better we developed recombinant mice which express tetracycline-regulated shRNAs broadly targeting the main components of the HIF/PHD pathway, permitting timed bi-directional intervention. We have shown that stabilization of HIF levels in adult mice through PHD2 enzyme silencing by RNA interference, or inducible recombination of floxed alleles, results in multi-lineage leukocytosis and features of autoimmunity. This phenotype was rapidly normalized on re-establishment of the hypoxia-sensing machinery when shRNA expression was discontinued. In both situations these effects were mediated principally through the Hif2a isoform. Assessment of cells bearing regulatory T cell markers from these mice revealed defective function and pro-inflammatory effects in vivo. We believe our findings have shown a new role for the PHD2/Hif2a couple in the reversible regulation of T cell and immune activity.
Collapse
Affiliation(s)
- Atsushi Yamamoto
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Joanna Hester
- Transplantation Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Philip S. Macklin
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Kento Kawai
- Transplantation Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Masateru Uchiyama
- Transplantation Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Daniel Biggs
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Tammie Bishop
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Katherine Bull
- Henry Wellcome Building for Molecular Physiology, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Xiaotong Cheng
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Eleanor Cawthorne
- Henry Wellcome Building for Molecular Physiology, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Mathew L. Coleman
- Henry Wellcome Building for Molecular Physiology, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Tanya L. Crockford
- Henry Wellcome Building for Molecular Physiology, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ben Davies
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Lukas E. Dow
- Sandra and Edward Meyer Cancer Center, Weill Cornell Medicine, New York, New York, USA
| | - Rob Goldin
- Department of Cellular Pathology, Imperial College London, London, United Kingdom
| | - Kamil Kranc
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Hiromi Kudo
- Department of Cellular Pathology, Imperial College London, London, United Kingdom
| | - Hannah Lawson
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - James McAuliffe
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Kate Milward
- Transplantation Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Cheryl L. Scudamore
- Veterinary Pathology, MRC Harwell, Mary Lyon Centre, Harwell Campus, Oxford, United Kingdom
| | - Elizabeth Soilleux
- Department of Pathology, School of Biological Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Fadi Issa
- Transplantation Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Peter J. Ratcliffe
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- The Francis Crick Institute, London, United Kingdom
| | - Chris W. Pugh
- Nuffield Department of Medicine Research Building, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| |
Collapse
|
4
|
Bolormaa S, Swan AA, Brown DJ, Hatcher S, Moghaddar N, van der Werf JH, Goddard ME, Daetwyler HD. Multiple-trait QTL mapping and genomic prediction for wool traits in sheep. Genet Sel Evol 2017; 49:62. [PMID: 28810834 PMCID: PMC5558709 DOI: 10.1186/s12711-017-0337-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 07/31/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The application of genomic selection to sheep breeding could lead to substantial increases in profitability of wool production due to the availability of accurate breeding values from single nucleotide polymorphism (SNP) data. Several key traits determine the value of wool and influence a sheep's susceptibility to fleece rot and fly strike. Our aim was to predict genomic estimated breeding values (GEBV) and to compare three methods of combining information across traits to map polymorphisms that affect these traits. METHODS GEBV for 5726 Merino and Merino crossbred sheep were calculated using BayesR and genomic best linear unbiased prediction (GBLUP) with real and imputed 510,174 SNPs for 22 traits (at yearling and adult ages) including wool production and quality, and breech conformation traits that are associated with susceptibility to fly strike. Accuracies of these GEBV were assessed using fivefold cross-validation. We also devised and compared three approximate multi-trait analyses to map pleiotropic quantitative trait loci (QTL): a multi-trait genome-wide association study and two multi-trait methods that use the output from BayesR analyses. One BayesR method used local GEBV for each trait, while the other used the posterior probabilities that a SNP had an effect on each trait. RESULTS BayesR and GBLUP resulted in similar average GEBV accuracies across traits (~0.22). BayesR accuracies were highest for wool yield and fibre diameter (>0.40) and lowest for skin quality and dag score (<0.10). Generally, accuracy was higher for traits with larger reference populations and higher heritability. In total, the three multi-trait analyses identified 206 putative QTL, of which 20 were common to the three analyses. The two BayesR multi-trait approaches mapped QTL in a more defined manner than the multi-trait GWAS. We identified genes with known effects on hair growth (i.e. FGF5, STAT3, KRT86, and ALX4) near SNPs with pleiotropic effects on wool traits. CONCLUSIONS The mean accuracy of genomic prediction across wool traits was around 0.22. The three multi-trait analyses identified 206 putative QTL across the ovine genome. Detailed phenotypic information helped to identify likely candidate genes.
Collapse
Affiliation(s)
- Sunduimijid Bolormaa
- Agriculture Victoria Research, AgriBio Centre, Bundoora, VIC, 3083, Australia. .,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia.
| | - Andrew A Swan
- Animal Genetics and Breeding Unit, University of New England, Armidale, NSW, 2351, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| | - Daniel J Brown
- Animal Genetics and Breeding Unit, University of New England, Armidale, NSW, 2351, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| | - Sue Hatcher
- NSW Department of Primary Industries, Orange Agricultural Institute, Orange, NSW, 2800, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| | - Nasir Moghaddar
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| | - Julius H van der Werf
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| | - Michael E Goddard
- Agriculture Victoria Research, AgriBio Centre, Bundoora, VIC, 3083, Australia.,School of Land and Environment, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Hans D Daetwyler
- Agriculture Victoria Research, AgriBio Centre, Bundoora, VIC, 3083, Australia.,School of Applied Systems Biology, La Trobe University, Bundoora, VIC, 3086, Australia.,Cooperative Research Centre for Sheep Industry Innovation, Armidale, NSW, 2351, Australia
| |
Collapse
|
5
|
Zhao Q, Abou-Hamdan H, Désaubry L. Recent Advances in the Synthesis of Flavaglines, a Family of Potent Bioactive Natural Compounds Originating from Traditional Chinese Medicine. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600437] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Qian Zhao
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
| | - Hussein Abou-Hamdan
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
| | - Laurent Désaubry
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry; College of Biotechnology; Tianjin University of Science and Technology; 300457 Tianjin P. R. China
| |
Collapse
|
6
|
Testing Chemotherapeutic Agents in the Feather Follicle Identifies a Selective Blockade of Cell Proliferation and a Key Role for Sonic Hedgehog Signaling in Chemotherapy-Induced Tissue Damage. J Invest Dermatol 2015; 135:690-700. [DOI: 10.1038/jid.2014.409] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 08/22/2014] [Accepted: 08/29/2014] [Indexed: 12/23/2022]
|
7
|
Li-Weber M. Molecular mechanisms and anti-cancer aspects of the medicinal phytochemicals rocaglamides (=flavaglines). Int J Cancer 2014; 137:1791-9. [PMID: 24895251 DOI: 10.1002/ijc.29013] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 05/29/2014] [Accepted: 06/02/2014] [Indexed: 01/08/2023]
Abstract
Rocaglamides (= flavaglines) are potent natural anti-cancer phytochemicals that inhibit cancer growth at nanomolar concentrations by the following mechanisms: (1) inhibition of translation initiation via inhibition of phosphorylation of the mRNA cap-binding eukaryotic translation initiation factor eIF4E and stabilization of RNA-binding of the translation initiation factor eIF4A in the eIF4F complex; (2) blocking cell cycle progression by activation of the ATM/ATR-Chk1/Chk2 checkpoint pathway; (3) inactivation of the heat shock factor 1 (HSF1) leading to up-regulation of thioredoxin-interacting protein (TXNIP) and consequent reduction of glucose uptake and (4) induction of apoptosis through activation of the MAPK p38 and JNK and inhibition of the Ras-CRaf-MEK-ERK signaling pathway. Besides the anti-cancer activities, rocaglamides are also shown to protect primary cells from chemotherapy-induced cell death and alleviate inflammation- and drug-induced injury in neuronal tissues. This review will focus on the recently discovered molecular mechanisms of the actions of rocaglamides and highlights the benefits of using rocaglamides in cancer treatment.
Collapse
Affiliation(s)
- Min Li-Weber
- Tumorimmunology Program (D030), German Cancer Research Center (DKFZ), D-69120, Heidelberg, Germany
| |
Collapse
|