keyword
MENU ▼
Read by QxMD icon Read
search

Megf10

keyword
https://www.readbyqxmd.com/read/29611808/formation-of-retinal-direction-selective-circuitry-initiated-by-starburst-amacrine-cell-homotypic-contact
#1
Thomas A Ray, Suva Roy, Christopher Kozlowski, Jingjing Wang, Jon Cafaro, Samuel W Hulbert, Christopher V E Wright, Greg D Field, Jeremy N Kay
A common strategy by which developing neurons locate their synaptic partners is through projections to circuit-specific neuropil sublayers. Once established, sublayers serve as a substrate for selective synapse formation, but how sublayers arise during neurodevelopment remains unknown. Here we identify the earliest events that initiate formation of the direction-selective circuit in the inner plexiform layer of mouse retina. We demonstrate that radially-migrating newborn starburst amacrine cells establish homotypic contacts on arrival at the inner retina...
April 3, 2018: ELife
https://www.readbyqxmd.com/read/29520845/draper-mediated-jnk-signaling-is-required-for-glial-phagocytosis-of-apoptotic-neurons-during-drosophila-metamorphosis
#2
Reut Hilu-Dadia, Ketty Hakim-Mishnaevski, Flonia Levy-Adam, Estee Kurant
Development of the central nervous system involves elimination of superfluous neurons through apoptosis and subsequent phagocytosis. In Drosophila, this occurs mainly during three developmental stages: embryogenesis, metamorphosis and emerging adult. Two transmembrane glial phagocytic receptors, SIMU (homolog of the mammalian Stabilin-2) and Draper (homolog of the mammalian MEGF10 and Jedi), mediate glial phagocytosis of apoptotic neurons during embryogenesis. However, less is known about the removal of apoptotic neurons during later stages of development...
March 9, 2018: Glia
https://www.readbyqxmd.com/read/29503163/five-novel-loci-associated-with-antipsychotic-treatment-response-in-patients-with-schizophrenia-a-genome-wide-association-study
#3
Hao Yu, Hao Yan, Lifang Wang, Jun Li, Liwen Tan, Wei Deng, Qi Chen, Guigang Yang, Fuquan Zhang, Tianlan Lu, Jianli Yang, Keqing Li, Luxian Lv, Qingrong Tan, Hongyan Zhang, Xiao Xiao, Ming Li, Xin Ma, Fude Yang, Lingjiang Li, Chuanyue Wang, Tao Li, Dai Zhang, Weihua Yue
BACKGROUND: Antipsychotic drugs improve schizophrenia symptoms and reduce the frequency of relapse, but treatment response is highly variable. Little is known about the genetic factors associated with treatment response. We did a genome-wide association study of antipsychotic treatment response in patients with schizophrenia. METHODS: The discovery cohort comprised patients with schizophrenia from 32 psychiatric hospitals in China that are part of the Chinese Antipsychotics Pharmacogenomics Consortium...
March 1, 2018: Lancet Psychiatry
https://www.readbyqxmd.com/read/29316776/phagocytic-roles-of-glial-cells-in-healthy-and-diseased-brains
#4
REVIEW
Yeon-Joo Jung, Won-Suk Chung
Glial cells are receiving much attention since they have been recognized as important regulators of many aspects of brain function and disease. Recent evidence has revealed that two different glial cells, astrocytes and microglia, control synapse elimination under normal and pathological conditions via phagocytosis. Astrocytes use the MEGF10 and MERTK phagocytic pathways, and microglia use the classical complement pathway to recognize and eliminate unwanted synapses. Notably, glial phagocytosis also contributes to the clearance of disease-specific protein aggregates, such as β-amyloid, huntingtin, and α-synuclein...
January 10, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29128256/megf10-related-myopathies-a-new-case-with-adult-onset-disease-with-prominent-respiratory-failure-and-review-of-reported-phenotypes
#5
Elizabeth Harris, Chiara Marini-Bettolo, Ana Töpf, Rita Barresi, Tuomo Polvikovski, Geraldine Bailey, Richard Charlton, James Tellez, Daniel MacArthur, Michela Guglieri, Hanns Lochmüller, Kate Bushby, Volker Straub
Recessive mutations in MEGF10 (multiple epidermal growth factor 10) have been reported in a severe early onset disorder named Early Myopathy, Areflexia, Respiratory Distress and Dysphagia, and a milder form with cores in the muscle biopsy; and a possible genotype-phenotype correlation determining the clinical presentation has been suggested. We undertook exome sequencing in a 66 year old male with a 20 year history of progressive proximal and distal weakness of upper and lower limbs, facial weakness and dysphagia, who developed respiratory failure requiring ventilation while still ambulant in his 50s...
January 2018: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/29109235/glial-draper-rescues-a%C3%AE-toxicity-in-a-drosophila-model-of-alzheimer-s-disease
#6
Arpita Ray, Sean D Speese, Mary A Logan
Pathological hallmarks of Alzheimer's disease (AD) include amyloid-β (Aβ) plaques, neurofibrillary tangles, and reactive gliosis. Glial cells offer protection against AD by engulfing extracellular Aβ peptides, but the repertoire of molecules required for glial recognition and destruction of Aβ are still unclear. Here, we show that the highly conserved glial engulfment receptor Draper/MEGF10 provides neuroprotection in an AD model of Drosophila (both sexes). Neuronal expression of human Aβ42arc in adult flies results in robust Aβ accumulation, neurodegeneration, locomotor dysfunction, and reduced lifespan...
December 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28642575/reactive-astrocytes-function-as-phagocytes-after-brain-ischemia-via-abca1-mediated-pathway
#7
Yosuke M Morizawa, Yuri Hirayama, Nobuhiko Ohno, Shinsuke Shibata, Eiji Shigetomi, Yang Sui, Junichi Nabekura, Koichi Sato, Fumikazu Okajima, Hirohide Takebayashi, Hideyuki Okano, Schuichi Koizumi
Astrocytes become reactive following various brain insults; however, the functions of reactive astrocytes are poorly understood. Here, we show that reactive astrocytes function as phagocytes after transient ischemic injury and appear in a limited spatiotemporal pattern. Following transient brain ischemia, phagocytic astrocytes are observed within the ischemic penumbra region during the later stage of ischemia. However, phagocytic microglia are mainly observed within the ischemic core region during the earlier stage of ischemia...
June 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28536440/genetic-variants-in-the-transcription-regulatory-region-of-megf10-are-associated-with-autism-in-chinese-han-population
#8
Zhiliu Wu, Jian Qin, Yang You, Yuanlin Ma, Meixiang Jia, Linyan Wang, Tianlan Lu, Weihua Yue, Yanyan Ruan, Dai Zhang, Jun Li, Lifang Wang
Multiple epidermal growth factor-like-domains 10 (MEGF10), a critical member of the apoptotic engulfment pathway, mediates axon pruning and synapse elimination during brain development. Previous studies indicated that synaptic pruning deficit was associated with autism-related phenotypes. However, the relationship between MEGF10 and autism remains poorly understood. Disease-associated variants are significantly enriched in the transcription regulatory regions. These include the transcription start site (TSS) and its cis-regulatory elements...
May 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526325/expression-of-megf10-in-cholinergic-and-glutamatergic-neurons
#9
Yu Fujita, Tomoji Maeda, Koji Kamaishi, Rui Saito, Koyo Chiba, Xuefeng Shen, Kun Zou, Hiroto Komano
Multiple-EGF like domains 10 (MEGF10) is the mammalian homologue of Draper, a Drosophila phagocytosis receptor that plays an important role in synapse elimination and cell type-specific recognition. However, the expression and function of MEGF10 in the brain remain to be elucidated. Therefore, we aimed to clarify the regions and types of neurons that express MEGF10 in the brain, and to determine whether cells expressing MEGF10 possess phagocytic abilities. Our results indicated that MEGF10 is expressed in cholinergic and glutamatergic neurons of the cortex, hippocampus, and substantia nigra...
July 13, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28498977/consequences-of-megf10-deficiency-on-myoblast-function-and-notch1-interactions
#10
Madhurima Saha, Satomi Mitsuhashi, Michael D Jones, Kelsey Manko, Hemakumar M Reddy, Christine C Bruels, Kyung-Ah Cho, Christina A Pacak, Isabelle Draper, Peter B Kang
Mutations in MEGF10 cause early onset myopathy, areflexia, respiratory distress, and dysphagia (EMARDD), a rare congenital muscle disease, but the pathogenic mechanisms remain largely unknown. We demonstrate that short hairpin RNA (shRNA)-mediated knockdown of Megf10, as well as overexpression of the pathogenic human p.C774R mutation, leads to impaired proliferation and migration of C2C12 cells. Myoblasts from Megf10-/- mice and Megf10-/-/mdx double knockout (dko) mice also show impaired proliferation and migration compared to myoblasts from wild type and mdx mice, whereas the dko mice show histological abnormalities that are not observed in either single mutant mouse...
August 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/27974694/hormophysa-triquerta-polyphenol-an-elixir-that-deters-cxcr4-and-cox2-dependent-dissemination-destiny-of-treatment-resistant-pancreatic-cancer-cells
#11
Sheeja Aravindan, Satishkumar Ramraj, Kathiresan Kandasamy, Somasundaram S Thirugnanasambandan, Dinesh Babu Somasundaram, Terence S Herman, Natarajan Aravindan
Therapy-resistant pancreatic cancer (PC) cells play a crucial role in tumor relapse, recurrence, and metastasis. Recently, we showed the anti-PC potential of an array of seaweed polyphenols and identified efficient drug deliverables. Herein, we investigated the benefit of one such deliverable, Hormophysa triquerta polyphenol (HT-EA), in regulating the dissemination physiognomy of therapy-resistant PC cells in vitro,and residual PC in vivo. Human PC cells exposed to ionizing radiation (IR), with/without HT-EA pre-treatment were examined for the alterations in the tumor invasion/metastasis (TIM) transcriptome (93 genes, QPCR-profiling)...
January 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/27862318/genome-wide-dna-methylation-analysis-identifies-megf10-as-a-novel-epigenetically-repressed-candidate-tumor-suppressor-gene-in-neuroblastoma
#12
Jessica Charlet, Ayumi Tomari, Anthony R Dallosso, Marianna Szemes, Martina Kaselova, Thomas J Curry, Bader Almutairi, Heather C Etchevers, Carmel McConville, Karim T A Malik, Keith W Brown
Neuroblastoma is a childhood cancer in which many children still have poor outcomes, emphasising the need to better understand its pathogenesis. Despite recent genome-wide mutation analyses, many primary neuroblastomas do not contain recognizable driver mutations, implicating alternate molecular pathologies such as epigenetic alterations. To discover genes that become epigenetically deregulated during neuroblastoma tumorigenesis, we took the novel approach of comparing neuroblastomas to neural crest precursor cells, using genome-wide DNA methylation analysis...
April 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/27822178/loss-of-cpeb3-upregulates-megf10-to-impair-mosaic-development-of-on-starburst-amacrine-cells
#13
Yin-Peng Chen, Geng-Shuo Bai, Meng-Fang Wu, Chuan-Chin Chiao, Yi-Shuian Huang
Cytoplasmic polyadenylation element binding protein 3 (CPEB3) regulates target RNA translation in neurons. Here, we examined CPEB3 distribution and function in the mouse retina. CPEB3 is expressed in retinal neurons, including those located in the inner nuclear layer (INL) and ganglion cell layer (GCL) but not in cone and rod photoreceptors in the outer nuclear layer (ONL). A previous study found CPEB3 expressed in cholinergic starburst amacrine cells (SACs). We first examined these cells and observed aberrant SAC mosaicism in CPEB3-knockout (KO) retinas...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27717089/chromosomal-microarray-in-a-highly-consanguineous-population-diagnostic-yield-utility-of-regions-of-homozygosity-and-novel-mutations
#14
M A Alabdullatif, M A Al Dhaibani, M Y Khassawneh, A W El-Hattab
Chromosomal microarray (CMA) has significantly improved diagnosing copy number variations (CNVs). Single nucleotide polymorphism (SNP) arrays confer additional utility in detecting regions of homozygosity (ROH). Investigating ROH for genes associated with recessive disorders for follow-up sequencing can aid in diagnosis. In this study, we performed a retrospective review of clinical and molecular data for 227 individuals from a highly consanguineous population who previously had a CMA. Pathogenic CNVs were identified in 32 (14%) cases; ROH suggesting uniparental disomy (UPD) in three (1%) cases, and an additional 25 (11%) individuals were diagnosed with recessive disorders caused by mutations in ROH candidate genes, thereby increasing the CMA diagnostic yield to 26%...
April 2017: Clinical Genetics
https://www.readbyqxmd.com/read/27647497/delayed-glial-clearance-of-degenerating-axons-in-aged-drosophila-is-due-to-reduced-pi3k-draper-activity
#15
Maria D Purice, Sean D Speese, Mary A Logan
Advanced age is the greatest risk factor for neurodegenerative disorders, but the mechanisms that render the senescent brain vulnerable to disease are unclear. Glial immune responses provide neuroprotection in a variety of contexts. Thus, we explored how glial responses to neurodegeneration are altered with age. Here we show that glia-axon phagocytic interactions change dramatically in the aged Drosophila brain. Aged glia clear degenerating axons slowly due to low phosphoinositide-3-kinase (PI3K) signalling and, subsequently, reduced expression of the conserved phagocytic receptor Draper/MEGF10...
September 20, 2016: Nature Communications
https://www.readbyqxmd.com/read/27460346/japanese-multiple-epidermal-growth-factor-10-megf10-myopathy-with-novel-mutations-a-phenotype-genotype-correlation
#16
Kazuko Takayama, Satomi Mitsuhashi, Je-Young Shin, Rieko Tanaka, Tatsuya Fujii, Rie Tsuburaya, Souichi Mukaida, Satoru Noguchi, Ikuya Nonaka, Ichizo Nishino
Mutations in the multiple epidermal growth factor-like domains 10 (MEGF10: NM_032446.2) gene are known to cause early-onset myopathy characterized by areflexia, respiratory distress, and dysphagia (EMARDD: OMIM 614399), and a milder phenotype of minicore myopathy. To date, there have been reports of six families with EMARDD and one with a milder disorder. Cysteine mutations in the extracellular EGF-like domain may be responsible for the milder phenotype, but the relationship is not conclusive because of the few reports of this disorder...
September 2016: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/27254118/rna-seq-reveals-10-novel-promising-candidate-genes-affecting-milk-protein-concentration-in-the-chinese-holstein-population
#17
Cong Li, Wentao Cai, Chenghao Zhou, Hongwei Yin, Ziqi Zhang, Juan J Loor, Dongxiao Sun, Qin Zhang, Jianfeng Liu, Shengli Zhang
Paired-end RNA sequencing (RNA-Seq) was used to explore the bovine transcriptome from the mammary tissue of 12 Chinese Holstein cows with 6 extremely high and 6 low phenotypic values for milk protein percentage. We defined the differentially expressed transcripts between the two comparison groups, extremely high and low milk protein percentage during the peak lactation (HP vs LP) and during the non-lactating period (HD vs LD), respectively. Within the differentially expressed genes (DEGs), we detected 157 at peak lactation and 497 in the non-lactating period with a highly significant correlation with milk protein concentration...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27170117/megf10-is-a-receptor-for-c1q-that-mediates-clearance-of-apoptotic-cells-by-astrocytes
#18
Tal Iram, Zaida Ramirez-Ortiz, Michael H Byrne, Uwanda A Coleman, Nathan D Kingery, Terry K Means, Dan Frenkel, Joseph El Khoury
UNLABELLED: Multiple EGF-like domains 10 (Megf10) is a class F scavenger receptor (SR-F3) expressed on astrocytes and myosatellite cells, and recessive mutations in humans result in early-onset myopathy, areflexia, respiratory distress, and dysphagia (EMARDD). Here we report that Megf10-deficient mice have increased apoptotic cells in the developing cerebellum and have impaired phagocytosis of apoptotic cells by astrocytes ex vivo We also report that cells transfected with Megf10 gain the ability to phagocytose apoptotic neurons and that Megf10 binds with high affinity to C1q, an eat-me signal for apoptotic cells...
May 11, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/26802438/adult-onset-respiratory-insufficiency-scoliosis-and-distal-joint-hyperlaxity-in-patients-with-multiminicore-disease-due-to-novel-megf10-mutations
#19
Teerin Liewluck, Margherita Milone, Xia Tian, Andrew G Engel, Nathan P Staff, Lee-Jun Wong
INTRODUCTION: Multiminicore disease is a congenital myopathy characterized pathologically by the presence of multiple minicore structures in the sarcoplasm. Mutations in the selenoprotein N1-encoding gene (SEPN1) and ryanodine receptor 1-encoding gene (RYR1) are responsible for half of the reported cases. Mutations in multiple epidermal growth factor-like domains 10-encoding gene (MEGF10) have been identified only recently in a few patients with antenatal to infantile-onset myopathy, with and without minicore pathology...
June 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/26657541/engulfment-pathways-promote-programmed-cell-death-by-enhancing-the-unequal-segregation-of-apoptotic-potential
#20
Sayantan Chakraborty, Eric J Lambie, Samik Bindu, Tamara Mikeladze-Dvali, Barbara Conradt
Components of the conserved engulfment pathways promote programmed cell death in Caenorhabditis elegans (C. elegans) through an unknown mechanism. Here we report that the phagocytic receptor CED-1 mEGF10 is required for the formation of a dorsal-ventral gradient of CED-3 caspase activity within the mother of a cell programmed to die and an increase in the level of CED-3 protein within its dying daughter. Furthermore, CED-1 becomes enriched on plasma membrane regions of neighbouring cells that appose the dorsal side of the mother, which later forms the dying daughter...
December 10, 2015: Nature Communications
keyword
keyword
21289
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"