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  • Female  (18)
  • Amino Acid Sequence  (6)
  • PROTEIN  (6)
  • 1
    Keywords: EXPRESSION ; screening ; DISEASE ; CDNA ; GENE ; GENE-EXPRESSION ; GENES ; HYBRIDIZATION ; PROTEIN ; PROTEINS ; RNA ; TISSUE ; DNA ; MARKER ; DOMAIN ; BINDING ; BIOLOGY ; cell cycle ; CELL-CYCLE ; CYCLE ; SEQUENCE ; IN-SITU ; PATTERNS ; CHROMATIN ; gene expression ; IN-SITU HYBRIDIZATION ; MARKERS ; DATABASE ; DNA-BINDING ; XENOPUS ; PREDICTION ; epidermis ; FUNCTIONAL GENOMICS ; REGULATOR ; ENDOPLASMIC-RETICULUM ; EMBRYOS ; TRANSCRIPTIONAL REGULATION ; embryogenesis ; CLUSTER ; clustering ; in situ hybridization ; molecular ; Xenopus laevis ; XENOPUS-LAEVIS ; EXPRESSED SEQUENCE TAGS ; SCREEN ; endoplasmic reticulum ; LAEVIS ; synexpression ; SYNEXPRESSION GROUP ; cluster analysis ; EXPRESSION PATTERNS ; GENE ONTOLOGY ; EXPRESSION PROFILES ; protein domain ; amphibian ; cDNA sequencing ; partial cDNA sequencing ; pattern formation ; regionalization
    Abstract: We have carried out a large-scale, semi-automated whole-mount in situ hybridization screen of 8369 cDNA clones in Xenopus laevis embryos. We confirm that differential gene expression is prevalent during embryogenesis since 24% of the clones are expressed nonubiquitously and 8% are organ or cell type specific marker genes. Sequence analysis and clustering yielded 723 unique genes displaying a differential expression pattern. Of these, 18% were already described in Xenopus, 47% have homologs and 35% are lacking significant sequence similarity in databases. Many of them encode known developmental regulators. We classified 363 of the 723 genes for which a Gene Ontology annotation for molecular function could be attributed and found 'DNA binding' and 'enzyme' the most represented terms. The most common protein domains encoded in these embryonic, differentially expressed genes are the homeobox and RNA Recognition Motif (RRM). Fifty-nine Putative orthologs of human disease genes, and 254 organ or cell specific marker genes were identified. Markers were found for nasal placode and archenteron roof, organs for which a specific marker was previously unavailable. Markers were also found for novel subdomains of various other organs. The tissues for which most markers were found are muscle and epidermis. Expression of cell cycle regulators fell in two classes, containing proliferation-promoting and anti-proliferative genes, respectively. We identified 66 new members of the BMP4, chromatin, endoplasmic reticulum, and karyopherin synexpression groups, thus providing a first glimpse of their probable cellular roles. Cluster analysis of tissues to measure tissue relatedness yielded some unorthodox affinities besides expectable lineage relationships. In conclusion, this study represents an atlas of gene expression patterns, which reveals embryonic regionalization, provides novel marker genes, and makes predictions about the functional role of unknown genes. (c) 2004 Elsevier Ireland Ltd. All rights reserved
    Type of Publication: Journal article published
    PubMed ID: 15763213
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  • 2
    Keywords: CELLS ; EXPRESSION ; Germany ; COHORT ; POPULATION ; RISK ; PROTEIN ; ASSOCIATION ; LINKAGE ; polymorphism ; POLYMORPHISMS ; VARIANTS ; PROMOTER ; SNP ; OBESITY ; LINKAGE DISEQUILIBRIUM ; EPITHELIAL-CELLS ; cholesterol ; case-control studies ; BODY ; DIABETES-MELLITUS ; SMALL-INTESTINE ; TYPE-2 ; INITIATION ; case-control study ; VARIANT ; INCREASE ; SNPs ; LEVEL ; case control studies ; INSULIN-RESISTANCE ; BMI ; SUBSTITUTION ; type 2 diabetes ; LINKAGE-DISEQUILIBRIUM ; HUMAN CELL LINES ; ALA54THR POLYMORPHISM ; FATTY-ACID-BINDING ; PROTEIN-2 GENE ; PROMOTER POLYMORPHISMS ; ATCC STOCKS ; CODON-54 ; fatty acid-binding protein ; SEAP assay
    Abstract: Fatty acid-binding protein 2 (FABP2) is a cytosolic protein expressed exclusively in epithelial cells of the small intestine. Some, albeit not conclusive, evidence indicates that the Thr-allele of FABP2 Ala54Thr polymorphism is associated with type 2 diabetes. More recently, common FABP2 promoter polymorphisms have shown association with postprandial increase of triglycerides, body composition and plasma lipid levels. Therefore, we reasoned that variants in the FABP2 promoter may also predispose to type 2 diabetes mellitus. In our Caucasian study population, we found three SNPs and three insertion-deletion polymorphisms that are in complete linkage disequilibrium defining promoter haplotype A and B within 1kb5' of the FABP2 initiation codon. Haplotype calculations indicated that the FABP2 promoter and Ala54Thr variants were strongly linked. Functional analysis of promoter fragments demonstrated that haplotype difference is caused by polymorphisms within 260 bp downstream of the FABP2 initiation codon. Using a prospective case-control study nested within the EPIC-Potsdam cohort of 192 incident type 2 diabetes cases and 384 sex-/age-matched controls, male subjects carrying the FABP2 haplotype B allele showed significantly decreased risk of type 2 diabetes when adjusted for BMI (OR = 0.50, 95% CI = 0.28-0.87, p 〈 0.05) and additional covariates (OR = 0.42, 95% CI 0.22-0.81, p 〈 0.01). Further adjustment for the Ala54Thr polymorphism revealed an OR of 0.18 (95% CI 0.06-0.49, p 〈 0.001). Similarly, Ala/Ala homozygote males carrying the promoter haplotype B had decreased risk (0.33, 0.11-0.94, p 〈 0.05) of type 2 diabetes after stratification for the Ala54Thr polymorphism. FABP2 promoter haplotypes or genotype combinations defined by the promoter and Ala54Thr polymorphism were not associated with BMI, body fat, leptin, HbA(1c), total cholesterol or HDL. In conclusion, our findings suggest that the functional FABP2 promoter haplotype may contribute to type 2 diabetes in a sex-specific manner
    Type of Publication: Journal article published
    PubMed ID: 16718625
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  • 3
    Keywords: RECEPTOR ; carcinoma ; RISK ; PROTEIN ; SUSCEPTIBILITY LOCUS ; VARIANTS ; METAANALYSIS ; 5P15.33 ; CEP57
    Abstract: Lung cancer is the leading cause of cancer death worldwide. Although several genetic variants associated with lung cancer have been identified in the past, stringent selection criteria of genome-wide association studies (GWAS) can lead to missed variants. The objective of this study was to uncover missed variants by using the known association between lung cancer and first-degree family history of lung cancer to enrich the variant prioritization for lung cancer susceptibility regions. In this two-stage GWAS study, we first selected a list of variants associated with both lung cancer and family history of lung cancer in four GWAS (3,953 cases, 4,730 controls), then replicated our findings for 30 variants in a meta-analysis of four additional studies (7,510 cases, 7,476 controls). The top ranked genetic variant rs12415204 in chr10q23.33 encoding FFAR4 in the Discovery set was validated in the Replication set with an overall OR of 1.09 (95% CI = 1.04, 1.14, P = 1.63 x 10(-4) ). When combining the two stages of the study, the strongest association was found in rs1158970 at Ch4p15.2 encoding KCNIP4 with an OR of 0.89 (95% CI = 0.85, 0.94, P = 9.64 x 10(-6) ). We performed a stratified analysis of rs12415204 and rs1158970 across all eight studies by age, gender, smoking status, and histology, and found consistent results across strata. Four of the 30 replicated variants act as expression quantitative trait loci (eQTL) sites in 1,111 nontumor lung tissues and meet the genome-wide 10% FDR threshold.
    Type of Publication: Journal article published
    PubMed ID: 25644374
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  • 4
    Keywords: PEPTIDE ; RECEPTOR ; CELLS ; EXPRESSION ; Germany ; human ; MODEL ; COMMON ; COHORT ; DISEASE ; RISK ; SITE ; GENE ; GENES ; PROTEIN ; RELEASE ; RISK-FACTORS ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; ACID ; NO ; AGE ; MUTATION ; SNP ; OBESITY ; risk factors ; REGION ; REGIONS ; EPIC-GERMANY ; insulin ; ASSOCIATIONS ; RE ; VARIANT ; ALLELE ; SNPs ; CARDIOVASCULAR-DISEASE ; AMINO-ACID ; interaction ; pancreatic ; GENOTYPE ; metabolic syndrome ; RISK-FACTOR ; cardiovascular disease ; EPIC-Potsdam ; DEPENDENT INSULINOTROPIC POLYPEPTIDE ; diabetes type 2 ; GASTRIC-INHIBITORY POLYPEPTIDE ; GIP receptor ; gluocose-dependent insulinotropic peptide
    Abstract: Glucose-dependent insulinotropic polypeptide (GIP) stimulates insulin release via interaction with its pancreatic receptor (GIP receptor (GIPR)). GIP also acts as vasoactive protein. To investigate whether variations in GIP and GIPR genes are associated with risk factors of the metabolic syndrome we sequenced gene regions and identified two coding SNPs (GIP Ser103Gly, GIPR Glu354Gln) and one splice site SNP (GIP rs2291726) in 47 subjects. Interestingly, in silico analyses revealed that splice site SNP rs2291726 results in a truncated protein and classified GIPR variant Glu354Gln as a functional amino acid change. Association analyses were performed in a case-cohort study of incident cardiovascular disease (CVD) nested in the EPIC-Potsdam cohort. No significant associations between incident CVD and GIP Ser103Gly and rs2291726 were found. For GIPR Glu354Gln, we obtained a nominal association of heterozygous minor allele carrier with CVD in a codominant model adjusted for BMI, sex, and age (OR: 0.67, Cl: 0.50-0.91,p = 0.01) or additional covariates of CVD (OR: 0.72, Cl: 0.52-0.97,p = 0.03). In conclusion, we identified a common splice site mutation (rs2291726) of the GIP gene which results in a truncated protein and provide preliminary evidence for an association of the heterozygous GIPR Glu354Gln genotype with CVD
    Type of Publication: Journal article published
    PubMed ID: 17624916
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  • 5
    Keywords: EXPRESSION ; Germany ; segmentation ; GENE ; GENES ; PROTEIN ; PROTEINS ; DIFFERENTIATION ; FAMILY ; DOMAIN ; MEMBER ; MEMBERS ; MOUSE ; CLOCK ; EMBRYO ; CONSERVATION ; XENOPUS ; DE-NOVO ; REPRESSION ; CHICKEN ; EMBRYOS ; MORPHOGENESIS ; NOTCH PATHWAY ; PARAXIAL MESODERM ; SOMITE SEGMENTATION ; SOMITOGENESIS
    Abstract: During somitogenesis, the cycling expression of members of the Notch signalling cascade is involved in a segmentation clock that regulates the periodic budding of somites in chicken, mouse, and zebrafish. In frog, genes with cycling expression in the presomitic mesoderm have not been reported. Here, we describe the expression of Xenopus esr9 and esr10, two new members of the Hairy/Enhancer of split related family of bHLH proteins. We show that they are expressed in a highly dynamic fashion, with their mRNA levels oscillating periodically in the presomitic mesoderm during somitogenesis. This dynamic expression is independent of de novo protein synthesis. Thus, expression of esr9 and esr10 is an indicator of the segmentation clock in the amphibian embryo. This confirms the evolutionary conservation of a molecular pathway involved in vertebrate segmentation clock
    Type of Publication: Journal article published
    PubMed ID: 12558606
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  • 6
    Keywords: PROTEIN ; CHILDHOOD ; HUMAN CANCERS ; MYC ; HEDGEHOG PATHWAY INHIBITOR ; ALPHA-SYNUCLEIN ; PARKINSONS-DISEASE ; COPY-NUMBER ALTERATION ; BETA FAMILY ; SYNPHILIN-1
    Abstract: Medulloblastoma, the most common malignant paediatric brain tumour, is currently treated with nonspecific cytotoxic therapies including surgery, whole-brain radiation, and aggressive chemotherapy. As medulloblastoma exhibits marked intertumoural heterogeneity, with at least four distinct molecular variants, previous attempts to identify targets for therapy have been underpowered because of small samples sizes. Here we report somatic copy number aberrations (SCNAs) in 1,087 unique medulloblastomas. SCNAs are common in medulloblastoma, and are predominantly subgroup-enriched. The most common region of focal copy number gain is a tandem duplication of SNCAIP, a gene associated with Parkinson's disease, which is exquisitely restricted to Group 4alpha. Recurrent translocations of PVT1, including PVT1-MYC and PVT1-NDRG1, that arise through chromothripsis are restricted to Group 3. Numerous targetable SCNAs, including recurrent events targeting TGF-beta signalling in Group 3, and NF-kappaB signalling in Group 4, suggest future avenues for rational, targeted therapy.
    Type of Publication: Journal article published
    PubMed ID: 22832581
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  • 7
    Publication Date: 2011-04-15
    Description: Schizophrenia (SCZD) is a debilitating neurological disorder with a world-wide prevalence of 1%; there is a strong genetic component, with an estimated heritability of 80-85%. Although post-mortem studies have revealed reduced brain volume, cell size, spine density and abnormal neural distribution in the prefrontal cortex and hippocampus of SCZD brain tissue and neuropharmacological studies have implicated dopaminergic, glutamatergic and GABAergic activity in SCZD, the cell types affected in SCZD and the molecular mechanisms underlying the disease state remain unclear. To elucidate the cellular and molecular defects of SCZD, we directly reprogrammed fibroblasts from SCZD patients into human induced pluripotent stem cells (hiPSCs) and subsequently differentiated these disorder-specific hiPSCs into neurons (Supplementary Fig. 1). SCZD hiPSC neurons showed diminished neuronal connectivity in conjunction with decreased neurite number, PSD95-protein levels and glutamate receptor expression. Gene expression profiles of SCZD hiPSC neurons identified altered expression of many components of the cyclic AMP and WNT signalling pathways. Key cellular and molecular elements of the SCZD phenotype were ameliorated following treatment of SCZD hiPSC neurons with the antipsychotic loxapine. To date, hiPSC neuronal pathology has only been demonstrated in diseases characterized by both the loss of function of a single gene product and rapid disease progression in early childhood. We now report hiPSC neuronal phenotypes and gene expression changes associated with SCZD, a complex genetic psychiatric disorder.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3392969/" 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/PMC3392969/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brennand, Kristen J -- Simone, Anthony -- Jou, Jessica -- Gelboin-Burkhart, Chelsea -- Tran, Ngoc -- Sangar, Sarah -- Li, Yan -- Mu, Yangling -- Chen, Gong -- Yu, Diana -- McCarthy, Shane -- Sebat, Jonathan -- Gage, Fred H -- P01 NS028121/NS/NINDS NIH HHS/ -- P30 NS072031/NS/NINDS NIH HHS/ -- R01 MH083911/MH/NIMH NIH HHS/ -- England -- Nature. 2011 May 12;473(7346):221-5. doi: 10.1038/nature09915. Epub 2011 Apr 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Salk Institute for Biological Studies, Laboratory of Genetics, 10010 North Torrey Pines Road, La Jolla California 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21490598" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Antipsychotic Agents/pharmacology ; Cell Differentiation ; Cells, Cultured ; Cellular Reprogramming/genetics ; Child ; Female ; Fibroblasts/cytology ; Gene Expression Profiling ; *Gene Expression Regulation/drug effects ; Humans ; Intracellular Signaling Peptides and Proteins/metabolism ; Loxapine/pharmacology ; Male ; Membrane Proteins/metabolism ; Models, Biological ; Neurites ; Neurons/*cytology/drug effects/*metabolism ; Phenotype ; Pluripotent Stem Cells/*cytology/*metabolism/pathology ; Receptors, Glutamate/metabolism ; Schizophrenia/*pathology ; Young Adult
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2012-08-03
    Description: Glioblastoma multiforme is the most common primary malignant brain tumour, with a median survival of about one year. This poor prognosis is due to therapeutic resistance and tumour recurrence after surgical removal. Precisely how recurrence occurs is unknown. Using a genetically engineered mouse model of glioma, here we identify a subset of endogenous tumour cells that are the source of new tumour cells after the drug temozolomide (TMZ) is administered to transiently arrest tumour growth. A nestin-DeltaTK-IRES-GFP (Nes-DeltaTK-GFP) transgene that labels quiescent subventricular zone adult neural stem cells also labels a subset of endogenous glioma tumour cells. On arrest of tumour cell proliferation with TMZ, pulse-chase experiments demonstrate a tumour re-growth cell hierarchy originating with the Nes-DeltaTK-GFP transgene subpopulation. Ablation of the GFP+ cells with chronic ganciclovir administration significantly arrested tumour growth, and combined TMZ and ganciclovir treatment impeded tumour development. Thus, a relatively quiescent subset of endogenous glioma cells, with properties similar to those proposed for cancer stem cells, is responsible for sustaining long-term tumour growth through the production of transient populations of highly proliferative cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3427400/" 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/PMC3427400/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Jian -- Li, Yanjiao -- Yu, Tzong-Shiue -- McKay, Renee M -- Burns, Dennis K -- Kernie, Steven G -- Parada, Luis F -- R01 CA131313/CA/NCI NIH HHS/ -- R01 NS048192-01/NS/NINDS NIH HHS/ -- England -- Nature. 2012 Aug 23;488(7412):522-6. doi: 10.1038/nature11287.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9133, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22854781" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents, Alkylating/pharmacology/therapeutic use ; Brain Neoplasms/*drug therapy/*pathology ; Cell Proliferation/drug effects ; Cell Tracking ; Dacarbazine/*analogs & derivatives/pharmacology/therapeutic use ; Disease Models, Animal ; Disease Progression ; Female ; Ganciclovir/pharmacology ; Glioblastoma/*drug therapy/*pathology ; Green Fluorescent Proteins/genetics/metabolism ; Male ; Mice ; Mice, Transgenic ; Neoplastic Stem Cells/*drug effects/*pathology ; Neural Stem Cells/drug effects/pathology ; Transgenes/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2012-09-21
    Description: The Pacific oyster Crassostrea gigas belongs to one of the most species-rich but genomically poorly explored phyla, the Mollusca. Here we report the sequencing and assembly of the oyster genome using short reads and a fosmid-pooling strategy, along with transcriptomes of development and stress response and the proteome of the shell. The oyster genome is highly polymorphic and rich in repetitive sequences, with some transposable elements still actively shaping variation. Transcriptome studies reveal an extensive set of genes responding to environmental stress. The expansion of genes coding for heat shock protein 70 and inhibitors of apoptosis is probably central to the oyster's adaptation to sessile life in the highly stressful intertidal zone. Our analyses also show that shell formation in molluscs is more complex than currently understood and involves extensive participation of cells and their exosomes. The oyster genome sequence fills a void in our understanding of the Lophotrochozoa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Guofan -- Fang, Xiaodong -- Guo, Ximing -- Li, Li -- Luo, Ruibang -- Xu, Fei -- Yang, Pengcheng -- Zhang, Linlin -- Wang, Xiaotong -- Qi, Haigang -- Xiong, Zhiqiang -- Que, Huayong -- Xie, Yinlong -- Holland, Peter W H -- Paps, Jordi -- Zhu, Yabing -- Wu, Fucun -- Chen, Yuanxin -- Wang, Jiafeng -- Peng, Chunfang -- Meng, Jie -- Yang, Lan -- Liu, Jun -- Wen, Bo -- Zhang, Na -- Huang, Zhiyong -- Zhu, Qihui -- Feng, Yue -- Mount, Andrew -- Hedgecock, Dennis -- Xu, Zhe -- Liu, Yunjie -- Domazet-Loso, Tomislav -- Du, Yishuai -- Sun, Xiaoqing -- Zhang, Shoudu -- Liu, Binghang -- Cheng, Peizhou -- Jiang, Xuanting -- Li, Juan -- Fan, Dingding -- Wang, Wei -- Fu, Wenjing -- Wang, Tong -- Wang, Bo -- Zhang, Jibiao -- Peng, Zhiyu -- Li, Yingxiang -- Li, Na -- Wang, Jinpeng -- Chen, Maoshan -- He, Yan -- Tan, Fengji -- Song, Xiaorui -- Zheng, Qiumei -- Huang, Ronglian -- Yang, Hailong -- Du, Xuedi -- Chen, Li -- Yang, Mei -- Gaffney, Patrick M -- Wang, Shan -- Luo, Longhai -- She, Zhicai -- Ming, Yao -- Huang, Wen -- Zhang, Shu -- Huang, Baoyu -- Zhang, Yong -- Qu, Tao -- Ni, Peixiang -- Miao, Guoying -- Wang, Junyi -- Wang, Qiang -- Steinberg, Christian E W -- Wang, Haiyan -- Li, Ning -- Qian, Lumin -- Zhang, Guojie -- Li, Yingrui -- Yang, Huanming -- Liu, Xiao -- Wang, Jian -- Yin, Ye -- Wang, Jun -- 268513/European Research Council/International -- England -- Nature. 2012 Oct 4;490(7418):49-54. doi: 10.1038/nature11413. Epub 2012 Sep 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22992520" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological/*genetics ; Animal Shells/chemistry/*growth & development ; Animals ; Apoptosis Regulatory Proteins/genetics ; Crassostrea/*genetics ; DNA Transposable Elements/genetics ; Evolution, Molecular ; Female ; Gene Expression Regulation, Developmental/genetics ; Genes, Homeobox/genetics ; Genome/*genetics ; Genomics ; HSP70 Heat-Shock Proteins/genetics ; Humans ; Larva/genetics/growth & development ; Mass Spectrometry ; Molecular Sequence Annotation ; Molecular Sequence Data ; Polymorphism, Genetic/genetics ; Repetitive Sequences, Nucleic Acid/genetics ; Sequence Analysis, DNA ; Stress, Physiological/genetics/*physiology ; Transcriptome/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2012-07-06
    Description: Mutations in the IDH1 and IDH2 genes encoding isocitrate dehydrogenases are frequently found in human glioblastomas and cytogenetically normal acute myeloid leukaemias (AML). These alterations are gain-of-function mutations in that they drive the synthesis of the 'oncometabolite' R-2-hydroxyglutarate (2HG). It remains unclear how IDH1 and IDH2 mutations modify myeloid cell development and promote leukaemogenesis. Here we report the characterization of conditional knock-in (KI) mice in which the most common IDH1 mutation, IDH1(R132H), is inserted into the endogenous murine Idh1 locus and is expressed in all haematopoietic cells (Vav-KI mice) or specifically in cells of the myeloid lineage (LysM-KI mice). These mutants show increased numbers of early haematopoietic progenitors and develop splenomegaly and anaemia with extramedullary haematopoiesis, suggesting a dysfunctional bone marrow niche. Furthermore, LysM-KI cells have hypermethylated histones and changes to DNA methylation similar to those observed in human IDH1- or IDH2-mutant AML. To our knowledge, our study is the first to describe the generation and characterization of conditional IDH1(R132H)-KI mice, and also the first report to demonstrate the induction of a leukaemic DNA methylation signature in a mouse model. Our report thus sheds light on the mechanistic links between IDH1 mutation and human AML.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4005896/" 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/PMC4005896/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sasaki, Masato -- Knobbe, Christiane B -- Munger, Joshua C -- Lind, Evan F -- Brenner, Dirk -- Brustle, Anne -- Harris, Isaac S -- Holmes, Roxanne -- Wakeham, Andrew -- Haight, Jillian -- You-Ten, Annick -- Li, Wanda Y -- Schalm, Stefanie -- Su, Shinsan M -- Virtanen, Carl -- Reifenberger, Guido -- Ohashi, Pamela S -- Barber, Dwayne L -- Figueroa, Maria E -- Melnick, Ari -- Zuniga-Pflucker, Juan-Carlos -- Mak, Tak W -- R01 AI081773/AI/NIAID NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2012 Aug 30;488(7413):656-9. doi: 10.1038/nature11323.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Campbell Family Institute for Breast Cancer Research, Ontario Cancer Institute, University Health Network, Toronto, Ontario M5G 2C1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22763442" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Bone Marrow/pathology ; Cell Lineage ; CpG Islands/genetics ; DNA Methylation ; Disease Models, Animal ; Epigenesis, Genetic/*genetics ; Female ; Gene Knock-In Techniques ; Glioma/pathology ; Hematopoiesis ; Hematopoietic Stem Cells/*cytology/metabolism ; Histones/metabolism ; Humans ; Isocitrate Dehydrogenase/*genetics/*metabolism ; Leukemia, Myeloid, Acute/genetics ; Male ; Mice ; Mutant Proteins/genetics/*metabolism ; Mutation/*genetics ; Myeloid Cells/cytology/metabolism ; Spleen/pathology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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