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Épigénétique et mémoire cellulaire

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ISSN: 9782213677705 ISBN: 9782213677705 9782722602328 Year: Language: French
Publisher: Collège de France
Added to DOAB on : 2014-02-27 14:16:29
License: OpenEdition licence for Books

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Comment l’information contenue dans nos gènes est-elle lue, mémorisée, interprétée ? Quels mécanismes contrôlent l’activité des gènes chez un individu ou à travers les générations ? La compréhension de ces mécanismes est un enjeu essentiel de la connaissance du vivant. L’épigénétique étudie la façon dont la lecture du génome est influencée par son histoire cellulaire. Depuis le séquençage du génome humain complet au début du XXIe siècle, l’épigénétique crée aussi l’espoir que nous sommes « pl...

The Bacterial Cell: Coupling between Growth, Nucleoid Replication, Cell Division and Shape

Authors: --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889198177 Year: Pages: 324 DOI: 10.3389/978-2-88919-817-7 Language: English
Publisher: Frontiers Media SA
Subject: Microbiology --- Science (General)
Added to DOAB on : 2016-01-19 14:05:46
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Bacterial Physiology was inaugurated as a discipline by the seminal research of Maaløe, Schaechter and Kjeldgaard published in 1958. Their work clarified the relationship between cell composition and growth rate and led to unravel the temporal coupling between chromosome replication and the subsequent cell division by Helmstetter et al. a decade later. Now, after half a century this field has become a major research direction that attracts interest of many scientists from different disciplines. The outstanding question how the most basic cellular processes - mass growth, chromosome replication and cell division - are inter-coordinated in both space and time is still unresolved at the molecular level. Several particularly pertinent questions that are intensively studied follow: (a) what is the primary signal to place the Z-ring precisely between the two replicating and segregating nucleoids? (b) Is this coupling related to the structure and position of the nucleoid itself? (c) How does a bacterium determine and maintain its shape and dimensions? Possible answers include gene expression-based mechanisms, self-organization of protein assemblies and physical principles such as micro-phase separations by excluded volume interactions, diffusion ratchets and membrane stress or curvature. The relationships between biochemical reactions and physical forces are yet to be conceived and discovered. This e-book discusses the above mentioned and related questions. The book also serves as an important depository for state-of-the-art technologies, methods, theoretical simulations and innovative ideas and hypotheses for future testing. Integrating the information gained from various angles will likely help decipher how a relatively simple cell such as a bacterium incorporates its multitude of pathways and processes into a highly efficient self-organized system. The knowledge may be helpful in the ambition to artificially reconstruct a simple living system and to develop new antibacterial drugs.

Mechanisms of Mitotic Chromosome Segregation

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ISBN: 9783038424031 9783038424024 Year: Pages: VIII, 332 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biology
Added to DOAB on : 2017-05-10 09:52:09
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This book describes current knowledge about the mechanisms by which cells segregate their already duplicated chromosomes in preparation for cell division. Experts in the field treat several important aspects of this subject: (1) the history of research on mitotic mechanisms, to serve as a background; (2) assembly of the mitotic spindle; (3) Kinetochore assembly and function; (4) the mechanisms of chromosome congression to the metaphase plate; (5) the spindle assembly checkpoint; (6) mechanisms to avoid and correct erroneous chromosome attachments to the spindle; (7) a molecular perspective on spindle assembly in land plants; (8) chromosome segregation in anaphase A; (9) spindle elongation in anaphase B; and (10) the consequences of errors in chromosome segregation. Each chapter provides the reader with a comprehensive and accurate picture of current research in a form that is both readable and authoritative. The volume is suitable for scholars in this and related fields and for teaching at an advanced level.

Evolution, Composition and Regulation of Supernumerary B Chromosomes

Authors: --- --- ---
ISBN: 9783038977865 / 9783038977872 Year: Pages: 254 DOI: 10.3390/books978-3-03897-787-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-08-28 11:21:28
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Supernumerary B chromosomes (Bs) are dispensable genetic elements found in thousands of species of plants and animals, and some fungi. Since their discovery more than a century ago, they have been a source of puzzlement, as they only occur in some members of a population and are absent from others. When they do occur, they are often harmful, and in the absence of “selfishness”, based on mechanisms of mitotic and meiotic drive, there appears to be no obvious reason for their existence. Cytogeneticists have long wrestled with questions about the biological existence of these enigmatic elements, including their lack of any adaptive properties, apparent absence of functional genes, their origin, sequence organization, and co-evolution as nuclear parasites. Emerging new technologies are now enabling researchers to step up a gear, to look enthusiastically beyond the previous limits of the horizon, and to uncover the secrets of these “silent” chromosomes. This book provides a comprehensive guide to theoretical advancements in the field of B chromosome research in both animal and plant systems.

Keywords

repetitive elements --- RNA-Seq --- genomics --- evolution --- cytogenetics --- supernumerary elements --- extra chromosomes --- B chromosomes --- transmission --- drive --- host/parasite interaction --- supernumerary chromosomes --- karyotype evolution --- genome instability --- supernumerary chromosomes --- heterochromatin --- parent-of-origin effects --- paternal X chromosome --- maternal X chromosome --- controlling element --- teleost --- population analysis --- whole genome resequencing --- DNA copy number variation --- ribosomal DNA --- B chromosomes --- FISH (fluorescence in situ hybridisation) --- GISH (genomic in situ hybridisation) --- Prospero autumnale complex --- supernumerary chromosomal segments (SCS) evolution --- tandem repeats --- Drosophila --- supernumerary --- satellite DNA --- sSMC --- B chromosomes --- dot-like (micro) Bs --- karyotypic characteristics --- ?s --- B morphotypes --- Apodemus peninsulae --- maize B chromosome --- centromere --- inactivation --- reactivation --- de novo centromere formation --- epigenetics --- supernumerary chromosomes --- additional chromosomes --- chromosome polymorphism --- evolution --- B chromosomes --- karyotypes --- genome evolution --- interphase nucleus --- mammals --- genes --- repetitive DNA --- transcription of heterochromatin --- B chromosomes --- grasshoppers --- DNA composition --- repeat clusters --- euchromatin degradation --- microdissected DNA probes --- B chromosome --- satellite DNA --- mobile element --- organelle DNA --- chromosome evolution --- fluorescent in situ hybridization --- Orthoptera --- satellite DNA --- supernumerary chromosome --- RepeatExplorer --- supernumerary chromosomes --- B chromosomes --- next-generation sequencing --- coverage ratio analysis --- n/a --- B chromosome --- transmission --- origin --- drive --- n/a

New Advances on Zika Virus Research

Authors: ---
ISBN: 9783038977643 Year: Pages: 552 DOI: 10.3390/books978-3-03897-765-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Internal medicine --- Medicine (General)
Added to DOAB on : 2019-04-05 10:34:31
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Zika virus (ZIKV) is a mosquito-borne member of the Flaviviridae family that historically has been associated with mild febrile illness. However, the recent outbreaks in Brazil in 2015 and its rapid spread throughout South and Central America and the Caribbean, together with its association with severe neurological disorders—including fetal microcephaly and Guillain-Barré syndrome in adults—have changed the historic perspective of ZIKV. Currently, ZIKV is considered an important public health concern that has the potential to affect millions of people worldwide. The significance of ZIKV in human health and the lack of approved vaccines and/or antiviral drugs to combat ZIKV infection have triggered a global effort to develop effective countermeasures to prevent and/or treat ZIKV infection. In this Special Issue of Viruses, we have assembled a collection of 32 research and review articles that cover the more recent advances on ZIKV molecular biology, replication and transmission, virus–host interactions, pathogenesis, epidemiology, vaccine development, antivirals, and viral diagnosis.

Keywords

Ziks virus --- silvestrol --- antiviral --- eIF4A --- hepatocytes --- flavivirus --- arbovirus --- Zika --- sexual transmission --- testis --- prostate --- Zika virus --- ZIKV --- rhesus macaques --- Non-human primates --- NHP --- infection --- natural history --- Asian-lineage --- African-lineage --- zika virus --- ZIKV–host interactions --- viral pathogenesis --- cell surface receptors --- antiviral responses --- viral counteraction --- cytopathic effects --- microcephaly --- ZIKV-associated neurologic disorders --- Zika virus --- serology --- flavivirus --- microsphere immunoassay --- validated --- optimised --- dengue virus --- ZIKV --- reporter virus --- cryptic promoter silencing --- full-length molecular clone --- subgenomic replicon --- plasmid toxicity --- Zika virus --- dengue viruses --- flavivirus --- ELISA --- indirect immunofluorescence --- plaque reduction neutralization test --- polymerase chain reaction --- cross-reactions --- Zika virus --- flavivirus --- infectious cDNA --- replication --- gene expression --- neuropathogenesis --- viral genetic variation --- host genetic variation --- flavivirus --- Zika virus --- therapy --- host-directed antivirals --- Aedes aegypti --- RNA-seq --- insecticide resistance --- Zika virus --- detoxification and immune system responses --- Zika virus --- mosquito-borne flavivirus --- emerging arbovirus --- outbreak control --- molecular diagnostics --- laboratory preparedness --- assay standardization --- external quality assessment --- EQA --- QCMD --- flavivirus --- eye --- zika virus --- blood-retinal barrier --- ocular --- innate response --- Zika virus --- pregnancy --- fetal infection --- congenital Zika syndrome --- Asian lineage --- Zika virus --- Full-length cDNA infectious clones --- Bacterial artificial chromosome --- NS2A protein --- Zika virus --- neural progenitor cells --- neurons --- Zika virus --- antivirals --- therapeutics --- research models and tools --- flavivirus --- Zika virus (ZIKV) --- reverse genetics --- infectious clone --- full-length molecular clone --- bacterial artificial chromosome --- replicon --- infectious RNA --- Zika virus --- flavivirus --- arbovirus --- sexual transmission --- host genetic variation --- immune response --- Zika virus --- flaviviruses --- vaccines --- virus like particles --- clinical trials --- ZIKV --- NS1 protein --- Zika virus --- diagnosis --- monoclonal antibodies --- ELISA --- zika virus --- placenta cells --- microglia cells --- siRNA --- TLR7/8 --- Zika --- viral evolution --- genetic variability --- Bayesian analyses --- Zika virus --- reverse genetics --- infectious cDNA --- Tet-inducible --- MR766 --- FSS13025 --- flavivirus --- ZIKV --- NS5 --- type I IFN antagonist --- point-of-care diagnostics --- isothermal nucleic acid amplification --- nucleic acid computation --- nucleic acid strand exchange --- zika virus --- mosquito --- mosquito surveillance --- multiplex nucleic acid detection --- boolean logic-processing nucleic acid probes --- Zika virus --- flavivirus --- astrocytomas --- dsRNA --- viral fitness --- antiviral --- heme-oxygenase 1 --- Zika virus --- viral replication --- Zika virus --- antiviral compounds --- neural cells --- viral replication --- flavivirus --- Zika virus --- viral persistence --- testicular cells --- testes --- Zika virus --- prM-E proteins --- viral pathogenicity --- virus attachment --- viral replication --- viral permissiveness --- viral survival --- apoptosis --- cytopathic effects --- mutagenesis --- chimeric viruses --- human brain glial cells --- Zika virus --- flavivirus --- microRNAs --- neurons --- neuroinflammation --- anti-viral immunity --- Zika virus --- dengue virus --- secondary infections --- cross-reactions --- IgA --- IgG avidity tests

Molecular Advances in Wheat and Barley

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ISBN: 9783039213719 / 9783039213726 Year: Pages: 290 DOI: 10.3390/books978-3-03921-372-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:15
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Allohexaploid bread wheat and diploid barley are two of the most cultivated crops in the world. This book reports novel research and reviews concerning the use of modern technologies to understand the molecular bases for wheat and barley improvement. The contributions published in this book illustrate research advances in wheat and barley knowledge using modern molecular techniques. These molecular approaches cover genomic, transcriptomic, proteomic, and phenomic levels, together with new tools for gene identification and the development of novel molecular markers. Overall, the contributions for this book lead to a further understanding of regulatory systems in order to improve wheat and barley performance.

Keywords

Triticum durum --- Aegilops tauschii --- Triticum aestivum --- marker-trait associations --- genes --- bread wheat --- genetic biofortification --- favorable alleles --- allohexaploid --- homoeolog --- hybrid necrosis --- molecular marker --- wheat --- wheat --- rye --- 6R --- small segment translocation --- powdery mildew --- transgenic wheat --- 12-oxophytodienoate reductase --- jasmonates --- freezing tolerance --- HIGS --- transgene --- wheat --- barley --- cereal cyst nematodes --- wheat --- barely --- breeding --- biotechnology --- resistance --- Triticum aestivum --- Landrace --- Powdery mildew --- Bulked segregant analysis-RNA-Seq (BSR-Seq) --- Single nucleotide polymorphism (SNP) --- Kompetitive Allele Specific PCR (KASP) --- Blumeria graminis f. sp. tritici --- protein two-dimensional electrophoresis --- mass spectrometry --- Pm40 --- Barley --- Grain development --- Transcriptional dynamics --- RNA editing --- RNA-seq --- durum wheat --- Tunisian landraces --- center of diversity --- genetic diversity --- population structure --- DArTseq technology --- chromatin --- 3D-FISH --- nucleus --- introgression --- rye --- hybrid --- wheat --- genome stability --- wheat --- Thinopyrum --- chromosome --- ND-FISH --- oligo probe --- barley --- wheat --- protease --- germination --- grain --- abiotic stress --- antioxidant enzymes --- aquaporin --- TdPIP2 --- 1 --- histochemical analysis --- transgenic wheat --- transpiration --- wheat --- Aegilops tauschii --- Lr42 --- disease resistance --- molecular mapping --- KASP markers --- marker-assisted selection --- phytase --- wheat --- barley --- purple acid phosphatase phytase --- PAPhy --- mature grain phytase activity (MGPA) --- genome assembly --- bread wheat --- barley --- optical mapping --- BAC --- ribosomal DNA --- cereals --- CRISPR --- crops --- genetic engineering --- genome editing --- plant --- Triticeae --- n/a

Towards Mechanism-based Treatments for Fragile X Syndrome

Authors: ---
ISBN: 9783039215058 / 9783039215065 Year: Pages: 250 DOI: 10.3390/books978-3-03921-506-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:15
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It has been more than 25 years since the identification of the FMR1 gene and the demonstration of the causative role of CGG-repeat expansion in the disease pathology of fragile X syndrome (FXS), but the underlying mechanisms involved in the expansion mutation and the resulting gene silencing still remain elusive. Our understanding of the pathways impacted by the loss of FMRP function has grown tremendously, and has opened new avenues for targeted treatments for FXS. However, the failure of recent clinical trials that were based on successful preclinical studies using the Fmr1 knockout mouse model has forced the scientific community to revisit clinical trial design and identify objective outcome measures. There has also been a renewed interest in restoring FMR1 gene expression as a possible treatment approach for FXS. This special issue of Brain Sciences highlights the progress that has been made towards understanding the disease mechanisms and how this has informed the development of treatment strategies that are being explored for FXS.

Keywords

fragile X syndrome --- clinical trials --- targeted treatments --- drug development --- fragile X syndrome --- clinical trials --- treatment development --- best practices --- fragile X syndrome --- newborn screening --- early identification --- fragile X syndrome --- X chromosome --- females --- FMR1 --- anxiety --- avoidance --- cognition --- behavior --- brain --- Fragile X --- FMRP --- Fxr2 --- Fmr1 --- fragile X syndrome --- executive function --- working memory --- set-shifting --- cognitive flexibility --- inhibitory control --- attention --- planning --- processing speed --- Fragile X syndrome 1 --- Fragile X-associated Tremor/Ataxia Syndrome 2 --- CRISPR 3 --- Trinucleotide Repeat 4 --- Gene editing --- fragile X syndrome --- FMR1 gene --- voice of the person --- voice of the patient --- characteristics that have the greatest impact --- developmental disorders --- fragile X syndrome --- language development --- automated vocal analysis --- adeno-associated virus --- autism spectrum disorders --- cerebral spinal fluid --- fragile X mental retardation protein --- neurodevelopmental disorders --- viral vector --- fragile X syndrome --- gene reactivation --- RNA:DNA hybrid --- FMRP --- histone methylation --- DNA methylation --- FMR1 --- PRC2 --- fragile X syndrome --- unstable repeat diseases --- epigenetic gene silencing --- DNA methylation --- repeat instability --- pluripotent stem cells --- CGG Repeat Expansion Disease --- DNA instability --- expansion --- contraction --- mismatch repair (MMR) --- base excision repair (BER) --- transcription coupled repair (TCR) --- double-strand break repair (DSBR) --- Non-homologous end-joining (NHEJ) --- mosaicism --- protein synthesis --- Fragile X Syndrome --- biomarker --- iPSC --- fibroblast --- lymphoblast --- fragile X syndrome --- molecular biomarkers --- FMR1 --- FMRP --- intellectual disability --- Fmr1 KO mouse --- ASD --- n/a

DNA Replication Stress

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ISBN: 9783039213894 / 9783039213900 Year: Pages: 368 DOI: 10.3390/books978-3-03921-390-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 16:10:12
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This Special Issue of International Journal of Molecular Sciences (IJMS) is dedicated to the mechanisms mediated at the molecular and cellular levels in response to adverse genomic perturbations and DNA replication stress. The relevant proteins and processes play paramount roles in nucleic acid transactions to maintain genomic stability and cellular homeostasis. A total of 18 articles are presented which encompass a broad range of highly relevant topics in genome biology. These include replication fork dynamics, DNA repair processes, DNA damage signaling and cell cycle control, cancer biology, epigenetics, cellular senescence, neurodegeneration, and aging. As Guest Editor for this IJMS Special Issue, I am very pleased to offer this collection of riveting articles centered on the theme of DNA replication stress. The blend of articles builds upon a theme that DNA damage has profound consequences for genomic stability and cellular homeostasis that affect tissue function, disease, cancer, and aging at multiple levels and through unique mechanisms. I thank the authors for their excellent contributions, which provide new insight into this fascinating and highly relevant area of genome biology.

Keywords

barley --- chromosome --- DNA replication pattern --- EdU --- mutagens --- DNA replication --- DNA damage --- DNA repair --- genome integrity --- A549 cells --- H1299 cells --- heterogeneity --- DNA damage response --- 8-chloro-adenosine --- DNA replication --- S phase --- origin firing --- TopBP1 --- ATR --- DNA fiber assay --- APE2 --- ATR-Chk1 DDR pathway --- Genome integrity --- SSB end resection --- SSB repair --- SSB signaling --- DNA replication stress --- genome stability --- ubiquitin --- replication fork restart --- translesion synthesis --- template-switching --- homologous recombination --- Fanconi Anemia --- G protein-coupled receptor (GPCR) --- aging --- DNA damage --- ?-arrestin --- G protein-coupled receptor kinase (GRK) --- interactome --- G protein-coupled receptor kinase interacting protein 2 (GIT2) --- ataxia telangiectasia mutated (ATM) --- clock proteins --- energy metabolism --- neurodegeneration --- cellular senescence --- ageing --- Alzheimer’s disease --- multiple sclerosis --- Parkinson’s disease --- lipofuscin --- SenTraGorTM (GL13) --- senolytics --- DNA replication --- DNA repair --- DNA damage response --- DNA translocation --- DNA helicase --- superfamily 2 ATPase --- replication restart --- fork reversal --- fork regression --- chromatin remodeler --- C9orf72 --- ALS --- motor neuron disease --- R loops, nucleolar stress --- neurodegeneration --- Difficult-to-Replicate Sequences --- replication stress --- non-B DNA --- Polymerase eta --- Polymerase kappa --- genome instability --- common fragile sites --- Microsatellites --- cancer --- DNA double-strand repair --- premature aging --- post-translational modification --- protein stability --- replication stress --- Werner Syndrome --- Werner Syndrome Protein --- dormant origins --- replicative stress --- replication timing --- DNA damage --- genome instability --- cancer --- Thermococcus eurythermalis --- endonuclease IV --- AP site analogue --- spacer --- DNA repair --- DNA repair --- double strand break repair --- exonuclease 1 --- EXO1 --- mismatch repair --- MMR --- NER --- nucleotide excision repair --- strand displacements --- TLS --- translesion DNA synthesis --- POL? --- mutation frequency --- mutations spectra --- SupF --- mutagenicity --- oxidative stress --- DNA damage --- DNA repair --- replication --- 8-oxoG --- epigenetic --- gene expression --- helicase --- cell cycle checkpoints --- genomic instability --- G2-arrest --- cell death --- repair of DNA damage --- adaptation --- n/a

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