keyword
MENU ▼
Read by QxMD icon Read
search

Microglia apoE

keyword
https://www.readbyqxmd.com/read/28434692/immune-hyperreactivity-of-a%C3%AE-plaque-associated-microglia-in-alzheimer-s-disease
#1
Zhuoran Yin, Divya Raj, Nasrin Saiepour, Debby Van Dam, Nieske Brouwer, Inge R Holtman, Bart J L Eggen, Thomas Möller, Joseph A Tamm, Aicha Abdourahman, Elly M Hol, Willem Kamphuis, Thomas A Bayer, Peter P De Deyn, Erik Boddeke
Alzheimer's disease (AD) is strongly associated with microglia-induced neuroinflammation. Particularly, Aβ plaque-associated microglia take on an "activated" morphology. However, the function and phenotype of these Aβ plaque-associated microglia are not well understood. We show hyperreactivity of Aβ plaque-associated microglia upon systemic inflammation in transgenic AD mouse models (i.e., 5XFAD and APP23). Gene expression profiling of Aβ plaque-associated microglia (major histocompatibility complex II(+) microglia) isolated from 5XFAD mice revealed a proinflammatory phenotype...
March 27, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28373057/lysophosphatidylcholine-export-by-human-abca7
#2
Maiko Tomioka, Yoshinobu Toda, Noralyn B Mañucat, Hiroyasu Akatsu, Manabu Fukumoto, Nozomu Kono, Hiroyuki Arai, Noriyuki Kioka, Kazumitsu Ueda
The ATP-binding cassette transporter A7 (ABCA7), which is highly expressed in the brain, is associated with the pathogenesis of Alzheimer's disease (AD). However, the physiological function of ABCA7 and its transport substrates remain unclear. Immunohistochemical analyses of human brain sections from AD and non-AD subjects revealed that ABCA7 is expressed in neuron and microglia cells in the cerebral cortex. The transport substrates and acceptors were identified in BHK/ABCA7 cells and compared with those of ABCA1...
March 31, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28143566/apoe-genotype-differentially-modulates-effects-of-anti-a%C3%AE-passive-immunization-in-app-transgenic-mice
#3
Joanna E Pankiewicz, Jairo Baquero-Buitrago, Sandrine Sanchez, Jennifer Lopez-Contreras, Jungsu Kim, Patrick M Sullivan, David M Holtzman, Martin J Sadowski
BACKGROUND: APOE genotype is the foremost genetic factor modulating β-amyloid (Aβ) deposition and risk of sporadic Alzheimer's disease (AD). Here we investigated how APOE genotype influences response to anti-Aβ immunotherapy. METHODS: APPSW/PS1dE9 (APP) transgenic mice with targeted replacement of the murine Apoe gene for human APOE alleles received 10D5 anti-Aβ or TY11-15 isotype control antibodies between the ages of 12 and 15 months. RESULTS: Anti-Aβ immunization decreased both the load of fibrillar plaques and the load of Aβ immunopositive plaques in mice of all APOE backgrounds...
January 31, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28106546/a-common-variant-of-il-6r-is-associated-with-elevated-il-6-pathway-activity-in-alzheimer-s-disease-brains
#4
Patrick C G Haddick, Jessica L Larson, Nisha Rathore, Tushar R Bhangale, Qui T Phung, Karpagam Srinivasan, David V Hansen, Jennie R Lill, Margaret A Pericak-Vance, Jonathan Haines, Lindsay A Farrer, John S Kauwe, Gerard D Schellenberg, Carlos Cruchaga, Alison M Goate, Timothy W Behrens, Ryan J Watts, Robert R Graham, Joshua S Kaminker, Marcel van der Brug
The common p.D358A variant (rs2228145) in IL-6R is associated with risk for multiple diseases and with increased levels of soluble IL-6R in the periphery and central nervous system (CNS). Here, we show that the p.D358A allele leads to increased proteolysis of membrane bound IL-6R and demonstrate that IL-6R peptides with A358 are more susceptible to cleavage by ADAM10 and ADAM17. IL-6 responsive genes were identified in primary astrocytes and microglia and an IL-6 gene signature was increased in the CNS of late onset Alzheimer's disease subjects in an IL6R allele dependent manner...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28077724/trem2-promotes-microglial-survival-by-activating-wnt-%C3%AE-catenin-pathway
#5
Honghua Zheng, Lin Jia, Chia-Chen Liu, Zhouyi Rong, Li Zhong, Longyu Yang, Xiao-Fen Chen, John D Fryer, Xin Wang, Yun-Wu Zhang, Huaxi Xu, Guojun Bu
Triggering Receptor Expressed on Myeloid cells 2 (TREM2), which is expressed on myeloid cells including microglia in the CNS, has recently been identified as a risk factor for Alzheimer's disease (AD). TREM2 transmits intracellular signals through its transmembrane binding partner DNAX-activating protein 12 (DAP12). Homozygous mutations inactivating TREM2 or DAP12 lead to Nasu-Hakola disease; however, how AD risk-conferring variants increase AD risk is not clear. To elucidate the signaling pathways underlying reduced TREM2 expression or loss of function in microglia, we respectively knocked down and knocked out the expression of TREM2 in in vitro and in vivo models...
February 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28003160/regulatory-factor-x1-depresses-apoe-dependent-a%C3%AE-uptake-by-mirna-124-in-microglial-response-to-oxidative-stress
#6
Chen-Zhuo Feng, Jin-Bo Yin, Jian-Jun Yang, Lin Cao
Decreased proteolytic clearance of soluble amyloid β (Aβ) in microglia affects Aβ accumulation on Alzheimer's disease progression. However, the potential molecular mechanism by which microglial Aβ uptake is regulated remains unclear. In this study, we identified a microRNA, miR-124, that was down-regulated in aging with a function in regulating apolipoprotein E (ApoE)-dependent Aβ uptake by targeting regulatory factor X1 (RFX1) transcripts on BV2 microglia cell. Decreased expression of miRNA-124 in BV2 cells exposed to mild hydrogen peroxide increased RFX1 protein level and decreased the expression of ApoE, a gene which has been suggested to enhance cellular Aβ uptake in microglia...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/27939990/apomorphine-prevents-lps-induced-il-23-p19-mrna-expression-via-inhibition-of-jnk-and-atf4-in-hapi-cells
#7
Hirokazu Hara, Dai Kimoto, Miho Kajita, Chisato Takada, Tetsuro Kamiya, Tetsuo Adachi
Inflammation has been reported to be closely related to exaggeration of cerebral ischemia and neurodegenerative diseases. Microglia, resident immune cells in the central nervous system, can be activated in response to neuronal injury and produce proinflammatory cytokines, resulting in further aggravation of neuronal injury. Interleukin (IL)-23, which consists of p19 and IL-12 p40 subunits, has been shown to be involved in brain injury associated with neuroinflammation. Apomorphine (Apo), a nonselective dopamine receptor agonist, has been used for clinical therapy of Parkinson's disease...
December 9, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27931217/lrp1-modulates-the-microglial-immune-response-via-regulation-of-jnk-and-nf-%C3%AE%C2%BAb-signaling-pathways
#8
Longyu Yang, Chia-Chen Liu, Honghua Zheng, Takahisa Kanekiyo, Yuka Atagi, Lin Jia, Daxin Wang, Aurelie N'songo, Dan Can, Huaxi Xu, Xiao-Fen Chen, Guojun Bu
BACKGROUND: Neuroinflammation is characterized by microglial activation and the increased levels of cytokines and chemokines in the central nervous system (CNS). Recent evidence has implicated both beneficial and toxic roles of microglia when over-activated upon nerve injury or in neurodegenerative diseases, including Alzheimer's disease (AD). The low-density lipoprotein receptor-related protein 1 (LRP1) is a major receptor for apolipoprotein E (apoE) and amyloid-β (Aβ), which play critical roles in AD pathogenesis...
December 8, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27885823/novel-functionalization-strategies-of-polymeric-nanoparticles-as-carriers-for-brain-medications
#9
Corinne Portioli, Michele Bovi, Donatella Benati, Marta Donini, Massimiliano Perduca, Alessandro Romeo, Stefano Dusi, Hugo L Monaco, Marina Bentivoglio
For targeted brain delivery, nanoparticles (NPs) should bypass the blood-brain barrier (BBB). Novel functionalization strategies, based on low-density lipoprotein receptor (LDLR) binding domain, have been here tested to increase the brain targeting efficacy of poly d,l-lactic-co-glycolic acid (PLGA) NPs, biodegradable and suited for biomedical applications. Custom-made PLGA NPs were functionalized with an apolipoprotein E modified peptide (pep-apoE) responsible for LDLR binding, or with lipocalin-type prostaglandin-d-synthase (L-PGDS), highly expressed in the brain...
March 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27714634/zinc-oxide-nanoparticle-induces-microglial-death-by-nadph-oxidase-independent-reactive-oxygen-species-as-well-as-energy-depletion
#10
Anuj Kumar Sharma, Vikas Singh, Ruchi Gera, Mahaveer Prasad Purohit, Debabrata Ghosh
Zinc oxide nanoparticle (ZnO-NP) is one of the most widely used engineered nanoparticles. Upon exposure, nanoparticle can eventually reach the brain through various routes, interact with different brain cells, and alter their activity. Microglia is the fastest glial cell to respond to any toxic insult. Nanoparticle exposure can activate microglia and induce neuroinflammation. Simultaneous to activation, microglial death can exacerbate the scenario. Therefore, we focused on studying the effect of ZnO-NP on microglia and finding out the pathway involved in the microglial death...
October 6, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27708245/chronic-low-dose-rate-ionising-radiation-affects-the-hippocampal-phosphoproteome-in-the-apoe-alzheimer-s-mouse-model
#11
Stefan J Kempf, Dirk Janik, Zarko Barjaktarovic, Ignacia Braga-Tanaka, Satoshi Tanaka, Frauke Neff, Anna Saran, Martin R Larsen, Soile Tapio
Accruing data indicate that radiation-induced consequences resemble pathologies of neurodegenerative diseases such as Alzheimer´s. The aim of this study was to elucidate the effect on hippocampus of chronic low-dose-rate radiation exposure (1 mGy/day or 20 mGy/day) given over 300 days with cumulative doses of 0.3 Gy and 6.0 Gy, respectively. ApoE deficient mutant C57Bl/6 mouse was used as an Alzheimer´s model. Using mass spectrometry, a marked alteration in the phosphoproteome was found at both dose rates...
November 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27700119/biomimetic-apoe-reconstituted-high-density-lipoprotein-nanocarrier-for-blood-brain-barrier-penetration-and-amyloid-beta-targeting-drug-delivery
#12
Qingxiang Song, Huahua Song, Jianrong Xu, Jialin Huang, Meng Hu, Xiao Gu, Juan Chen, Gang Zheng, Hongzhuan Chen, Xiaoling Gao
Amyloid beta (Aβ) and its aggregation forms in the brain have been suggested as key targets for the therapy of Alzheimer's disease (AD). Therefore, the development of nanocarriers that possess both blood-brain barrier permeability and Aβ-targeting ability is of great importance for the intervention of AD. Here we constructed a biomimetic nanocarrier named apolipoprotein E (ApoE)-reconstituted high density lipoprotein nanocarrier (ANC) from recombinant ApoE and synthetic lipids to achieve the above goals. α-Mangostin (α-M), a polyphenolic agent that can inhibit the formation of Aβ oligomers and fibrils and accelerate Aβ cellular degradation, was used as the model drug...
November 7, 2016: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/27477018/trem2-binds-to-apolipoproteins-including-apoe-and-clu-apoj-and-thereby-facilitates-uptake-of-amyloid-beta-by-microglia
#13
Felix L Yeh, Yuanyuan Wang, Irene Tom, Lino C Gonzalez, Morgan Sheng
Genetic variants of TREM2, a protein expressed selectively by microglia in the brain, are associated with Alzheimer's disease (AD). Starting from an unbiased protein microarray screen, we identified a set of lipoprotein particles (including LDL) and apolipoproteins (including CLU/APOJ and APOE) as ligands of TREM2. Binding of these ligands by TREM2 was abolished or reduced by disease-associated mutations. Overexpression of wild-type TREM2 was sufficient to enhance uptake of LDL, CLU, and APOE in heterologous cells, whereas TREM2 disease variants were impaired in this activity...
July 20, 2016: Neuron
https://www.readbyqxmd.com/read/27425031/transcriptional-profiling-of-cd11c-positive-microglia-accumulating-around-amyloid-plaques-in-a-mouse-model-for-alzheimer-s-disease
#14
Willem Kamphuis, Lieneke Kooijman, Sjoerd Schetters, Marie Orre, Elly M Hol
Amyloid plaques in Alzheimer's disease (AD) mice are surrounded by activated microglia. The functional role of microglia activation in AD is not well understood; both detrimental and beneficial effects on AD progression have been reported. Here we show that the population of activated microglia in the cortex of the APPswe/PS1dE9 mouse AD model is divided into a CD11c-positive and a CD11c-negative subpopulation. Cd11c transcript levels and number of CD11c-positive microglia increase sharply when plaques start to occur and both parameters continue to rise in parallel with the age-related increasing plaque load...
October 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27345627/probucol-inhibits-lps-induced-microglia-activation-and-ameliorates-brain-ischemic-injury-in-normal-and-hyperlipidemic-mice
#15
Yeon Suk Jung, Jung Hwa Park, Hyunha Kim, So Young Kim, Ji Young Hwang, Ki Whan Hong, Sun Sik Bae, Byung Tae Choi, Sae-Won Lee, Hwa Kyoung Shin
AIM: Increasing evidence suggests that probucol, a lipid-lowering agent with anti-oxidant activities, may be useful for the treatment of ischemic stroke with hyperlipidemia via reduction in cholesterol and neuroinflammation. In this study we examined whether probucol could protect against brain ischemic injury via anti-neuroinflammatory action in normal and hyperlipidemic mice. METHODS: Primary mouse microglia and murine BV2 microglia were exposed to lipopolysaccharide (LPS) for 3 h, and the release NO, PGE2, IL-1β and IL-6, as well as the changes in NF-κB, MAPK and AP-1 signaling pathways were assessed...
August 2016: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/27256292/microglial-immunophenotype-in-dementia-with-alzheimer-s-pathology
#16
Thais Minett, John Classey, Fiona E Matthews, Marie Fahrenhold, Mariko Taga, Carol Brayne, Paul G Ince, James A R Nicoll, Delphine Boche
BACKGROUND: Genetic risk factors for Alzheimer's disease imply that inflammation plays a causal role in development of the disease. Experimental studies suggest that microglia, as the brain macrophages, have diverse functions, with their main role in health being to survey the brain parenchyma through highly motile processes. METHODS: Using the Medical Research Council Cognitive Function and Ageing Studies resources, we have immunophenotyped microglia to investigate their role in dementia with Alzheimer's pathology...
June 2, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27241720/an-apoe-derived-mimic-peptide-cog1410-alleviates-early-brain-injury-via-reducing-apoptosis-and-neuroinflammation-in-a-mouse-model-of-subarachnoid-hemorrhage
#17
Yue Wu, Jinwei Pang, Jianhua Peng, Fang Cao, Michael P Vitek, Fengqiao Li, Yong Jiang, Xiaochuan Sun
This study investigated the neuroprotective effects of COG1410, an apoliporotein E (apoE)-derived mimic peptide, against early brain injury (EBI) after subarachnoid hemorrhage (SAH). SAH was induced in C57BL/6J mice (n=68) by endovascular perforation. Mice received intravenous injection of COG1410 (2mg/kg) or equal volume of vehicle (saline). The mortality rate, neurological score, rotarod latencies, cell apoptosis, microglial activation, pro-inflammatory cytokines production and protein levels of apoptotic and inflammatory markers were assessed at 24h after sham operation or SAH...
August 3, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27235741/bexarotene-protects-against-traumatic-brain-injury-in-mice-partially-through-apolipoprotein-e
#18
Jianjun Zhong, Chongjie Cheng, Han Liu, Zhijian Huang, Yue Wu, Zhipeng Teng, Junchi He, Hongrong Zhang, Jinchuan Wu, Fang Cao, Li Jiang, Xiaochuan Sun
Bexarotene has been proved to have neuroprotective effects in many animal models of neurological diseases. However, its neuroprotection in traumatic brain injury (TBI) is still unknown. This study aims to explore the neuroprotective effects of bexarotene on TBI and its possible mechanism. Controlled cortical impact (CCI) model was used to simulate TBI in C57BL/6 mice as well as APOE gene knockout (APOE-KO) mice. After CCI, mice were daily dosed with bexarotene or vehicle solution intraperitoneally. The motor function, learning and memory, inflammatory factors, microglia amount, apoptosis condition around injury site and main side-effects were all measured...
May 26, 2016: Neuroscience
https://www.readbyqxmd.com/read/27100611/targeting-microglia-for-the-treatment-of-alzheimer-s-disease
#19
REVIEW
Paul D Wes, Faten A Sayed, Frédérique Bard, Li Gan
While histological changes in microglia have long been recognized as a pathological feature of Alzheimer's disease (AD), recent genetic association studies have also strongly implicated microglia in the etiology of the disease. Coding and noncoding polymorphisms in several genes expressed in microglia-including APOE, TREM2, CD33, GRN, and IL1RAP-alter AD risk, and therefore could be considered as entry points for therapeutic intervention. Furthermore, microglia may have a substantial effect on current amyloid β (Aβ) and tau immunotherapy approaches, since they are the primary cell type in the brain to mediate Fc receptor-facilitated antibody effector function...
October 2016: Glia
https://www.readbyqxmd.com/read/27057732/lxr-activation-protects-hippocampal-microvasculature-in-very-old-triple-transgenic-mouse-model-of-alzheimer-s-disease
#20
Adrián G Sandoval-Hernández, Alejandro Restrepo, Gloria P Cardona-Gómez, Gonzalo Arboleda
The vascular hypothesis of Alzheimer's disease postulates that disruption of the brain microvasculature is important for the accumulation of amyloid beta and increased neuroinflammation. Liver X Receptor agonist, GW3965, has been demonstrated to successfully modulate neuroinflammation and lipid metabolism in murine models of AD. This is partially due to increased expression of ApoE levels and increased mobility of endothelial progenitor cells. This paper analyzes changes in the neurovascular unit and in astrocytes and microglia markers following oral administration of GW3965 in a very old triple transgenic AD mice (3xTg-AD mice)...
May 16, 2016: Neuroscience Letters
keyword
keyword
54201
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"