keyword
MENU ▼
Read by QxMD icon Read
search

sAPPα

keyword
https://www.readbyqxmd.com/read/28323038/monocular-denervation-of-visual-nuclei-modulates-app-processing-and-sapp%C3%AE-production-a-possible-role-on-neural-plasticity
#1
Juliana Ferreira Vasques, Pedro Vinícius Bastos Heringer, Renata Guedes de Jesus Gonçalves, Paula Campello-Costa, Claudio Alberto Serfaty, Adriana da Cunha Faria-Melibeu
Amyloid precursor protein (APP) is essential to physiological processes such as synapse formation and neural plasticity. Sequential proteolysis of APP by beta- and gamma-secretases generates amyloid-beta peptide (Aβ), the main component of senile plaques in Alzheimer Disease. Alternative APP cleavage by alpha-secretase occurs within Aβ domain, releasing soluble α-APP (sAPPα), a neurotrophic fragment. Among other functions, sAPPα is important to synaptogenesis, neural survival and axonal growth. APP and sAPPα levels are increased in models of neuroplasticity, which suggests an important role for APP and its metabolites, especially sAPPα, in the rearranging brain...
March 16, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28283595/astroglial-activation-and-altered-amyloid-metabolism-in-human-repetitive-concussion
#2
Pashtun Shahim, Yelverton Tegner, Niklas Marklund, Kina Höglund, Erik Portelius, David L Brody, Kaj Blennow, Henrik Zetterberg
OBJECTIVE: To determine whether postconcussion syndrome (PCS) due to repetitive concussive traumatic brain injury (rcTBI) is associated with CSF biomarker evidence of astroglial activation, amyloid deposition, and blood-brain barrier (BBB) impairment. METHODS: A total of 47 participants (28 professional athletes with PCS and 19 controls) were assessed with lumbar puncture (median 1.5 years, range 0.25-12 years after last concussion), standard MRI of the brain, and Rivermead Post-Concussion Symptoms Questionnaire (RPQ)...
March 10, 2017: Neurology
https://www.readbyqxmd.com/read/28212403/cerebrospinal-fluid-biomarkers-of-infantile-congenital-hydrocephalus
#3
David D Limbrick, Brandon Baksh, Clinton D Morgan, Gakwaya Habiyaremye, James P McAllister, Terrie E Inder, Deanna Mercer, David M Holtzman, Jennifer Strahle, Michael J Wallendorf, Diego M Morales
INTRODUCTION: Hydrocephalus is a complex neurological disorder with a pervasive impact on the central nervous system. Previous work has demonstrated derangements in the biochemical profile of cerebrospinal fluid (CSF) in hydrocephalus, particularly in infants and children, in whom neurodevelopment is progressing in parallel with concomitant neurological injury. The objective of this study was to examine the CSF of children with congenital hydrocephalus (CHC) to gain insight into the pathophysiology of hydrocephalus and identify candidate biomarkers of CHC with potential diagnostic and therapeutic value...
2017: PloS One
https://www.readbyqxmd.com/read/28209190/the-effects-of-different-familial-alzheimer-s-disease-mutations-on-app-processing-in-vivo
#4
Steinunn Thordardottir, Anne Kinhult Ståhlbom, Ove Almkvist, Håkan Thonberg, Maria Eriksdotter, Henrik Zetterberg, Kaj Blennow, Caroline Graff
BACKGROUND: Disturbed amyloid precursor protein (APP) processing is considered to be central to the pathogenesis of Alzheimer's disease (AD). The autosomal dominant form of the disease, familial AD (FAD), may serve as a model for the sporadic form of AD. In FAD the diagnosis of AD is reliable and presymptomatic individuals carrying FAD mutations can give valuable insights into the earliest stages of the disease where therapeutic interventions are thought to be the most effective. METHODS: In the current cross-sectional study, products of APP processing (e...
February 16, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28197076/structure-and-synaptic-function-of-metal-binding-to-the-amyloid-precursor-protein-and-its-proteolytic-fragments
#5
REVIEW
Klemens Wild, Alexander August, Claus U Pietrzik, Stefan Kins
Alzheimer's disease (AD) is ultimately linked to the amyloid precursor protein (APP). However, current research reveals an important synaptic function of APP and APP-like proteins (APLP1 and 2). In this context various neurotrophic and neuroprotective functions have been reported for the APP proteolytic fragments sAPPα, sAPPβ and the monomeric amyloid-beta peptide (Aβ). APP is a metalloprotein and binds copper and zinc ions. Synaptic activity correlates with a release of these ions into the synaptic cleft and dysregulation of their homeostasis is linked to different neurodegenerative diseases...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28197070/role-of-app-interactions-with-heterotrimeric-g-proteins-physiological-functions-and-pathological-consequences
#6
REVIEW
Philip F Copenhaver, Donat Kögel
Following the discovery that the amyloid precursor protein (APP) is the source of β-amyloid peptides (Aβ) that accumulate in Alzheimer's disease (AD), structural analyses suggested that the holoprotein resembles a transmembrane receptor. Initial studies using reconstituted membranes demonstrated that APP can directly interact with the heterotrimeric G protein Gαo (but not other G proteins) via an evolutionarily G protein-binding motif in its cytoplasmic domain. Subsequent investigations in cell culture showed that antibodies against the extracellular domain of APP could stimulate Gαo activity, presumably mimicking endogenous APP ligands...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28107420/the-polyherbal-wattana-formula-displays-anti-amyloidogenic-properties-by-increasing-%C3%AE-secretase-activities
#7
Htut Htut Htoo, Suveerawan Limsuvan, Onusa Thamsermsang, Jean-François Hernandez, Frédéric Checler, Piyarat Govitrapong, Narawut Pakaprot, Pravit Akarasereenont, Bruno Vincent
Alzheimer's disease is characterized by the deposition of insoluble amyloid-β peptides produced from the β-amyloid precursor protein (βAPP). Because α-secretase cleavage by ADAM10 and ADAM17 takes place in the middle of Aβ, its activation is considered as a promising anti-AD therapeutic track. Here we establish that the polyherbal Wattana formula (WNF) stimulates sAPPα production in cells of neuronal and non-neuronal origins through an increase of both ADAM10 and ADAM17 catalytic activities with no modification of BACE1 activity and expression...
2017: PloS One
https://www.readbyqxmd.com/read/28079060/intranasal-lactoferrin-enhances-%C3%AE-secretase-dependent-amyloid-precursor-protein-processing-via-the-erk1-2-creb-and-hif-1%C3%AE-pathways-in-an-alzheimer-s-disease-mouse-model
#8
Chuang Guo, Zhao-Hui Yang, Shuai Zhang, Rui Chai, Han Xue, Yan-Hui Zhang, Jia-Yi Li, Zhan-You Wang
Growing evidence suggests that lactoferrin (Lf), an iron-binding glycoprotein, is a pleiotropic functional nutrient. Additionally, Lf was recently implicated as a neuroprotective agent. These properties make Lf a valuable therapeutic candidate for the treatment of Alzheimer's disease (AD). However, the mechanisms regulating the physiological roles of Lf in the pathologic condition of AD remain unknown. In the present study, an APPswe/PS1DE9 transgenic mouse model of AD was used. We explored whether intranasal human Lf (hLf) administration could reduce β-amyloid (Aβ) deposition and ameliorate cognitive decline in this AD model...
January 12, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28034780/formononetin-attenuates-a%C3%AE-25-35-induced-cytotoxicity-in-ht22-cells-via-pi3k-akt-signaling-and-non-amyloidogenic-cleavage-of-app
#9
Lizhi Chen, Shanshan Ou, Lingqi Zhou, Hai Tang, Jie Xu, Kaihua Guo
Amyloid beta (Aβ) is the main component of the amyloid plaques that accumulate in the brains of Alzheimer patients. Here, we reported the protective role of Formononetin (Form) against Aβ25-35-induced neurotoxicity in HT22 cells. We found that Form significantly increased the viability of HT22 cells but decreased the cell apoptosis when challenging with Aβ25-35. The inhibitory effects of Form were associated with PI3K/Akt signaling pathway as PI3K inhibitor (LY294002) or ERα specific inhibitor (MPP) blocked the effects...
February 3, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/27929541/non-amyloidogenic-effects-of-%C3%AE-2-adrenergic-agonists-implications-for-brimonidine-mediated-neuroprotection
#10
Shereen Nizari, Li Guo, Benjamin M Davis, Eduardo M Normando, Joana Galvao, Lisa A Turner, Mukhtar Bizrah, Mohammad Dehabadi, Kailin Tian, M Francesca Cordeiro
The amyloid beta (Aβ) pathway is strongly implicated in neurodegenerative conditions such as Alzheimer's disease and more recently, glaucoma. Here, we identify the α2 adrenergic receptor agonists (α2ARA) used to lower intraocular pressure can prevent retinal ganglion cell (RGC) death via the non-amyloidogenic Aβ-pathway. Neuroprotective effects were confirmed in vivo and in vitro in different glaucoma-related models using α2ARAs brimonidine (BMD), clonidine (Clo) and dexmedetomidine. α2ARA treatment significantly reduced RGC apoptosis in experimental-glaucoma models by 97...
December 8, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27825720/ginsenoside-rd-promotes-non-amyloidogenic-pathway-of-amyloid-precursor-protein-processing-by-regulating-phosphorylation-of-estrogen-receptor-alpha
#11
Xiaodong Yan, Gengyao Hu, Weiming Yan, Tao Chen, Feng Yang, Xiao Zhang, Gang Zhao, Juanfang Liu
AIMS: Previous study demonstrated that Ginsenoside Rd. (GS-Rd) could improve cognitive and memory function in animal model of Alzheimer's disease. This study was aimed to investigate whether GS-Rd could improve non-amyloidogenic pathway by activating estrogen receptor (ER). MAIN METHODS: 10mg/kg GS-Rd in ovariectomy (OVX)+GS-Rd group and equivalent volume of saline in sham operated group and OVX group were administrated intraperitoneally for two months, respectively...
January 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/27212113/finding-novel-distinctions-between-the-sapp%C3%AE-mediated-anabolic-biochemical-pathways-in-autism-spectrum-disorder-and-fragile-x-syndrome-plasma-and-brain-tissue
#12
Balmiki Ray, Deborah K Sokol, Bryan Maloney, Debomoy K Lahiri
UNLABELLED: Autism spectrum disorder (ASD) and Fragile X syndrome (FXS) are developmental disorders. No validated blood-based biomarkers exist for either, which impedes bench-to-bedside approaches. Amyloid-β (Aβ) precursor protein (APP) and metabolites are usually associated with Alzheimer's disease (AD). APP cleavage by α-secretase produces potentially neurotrophic secreted APPα (sAPPα) and the P3 peptide fragment. β-site APP cleaving enzyme (BACE1) cleavage produces secreted APPβ (sAPPβ) and intact Aβ...
May 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27114849/the-neuroprotective-properties-of-the-amyloid-precursor-protein-following-traumatic-brain-injury
#13
REVIEW
Stephanie Plummer, Corinna Van den Heuvel, Emma Thornton, Frances Corrigan, Roberto Cappai
Despite the significant health and economic burden that traumatic brain injury (TBI) places on society, the development of successful therapeutic agents have to date not translated into efficacious therapies in human clinical trials. Injury to the brain is ongoing after TBI, through a complex cascade of primary and secondary injury events, providing a valuable window of opportunity to help limit and prevent some of the severe consequences with a timely treatment. Of note, it has been suggested that novel treatments for TBI should be multifactorial in nature, mimicking the body's own endogenous repair response...
March 2016: Aging and Disease
https://www.readbyqxmd.com/read/27068280/csf-and-blood-biomarkers-for-the-diagnosis-of-alzheimer-s-disease-a-systematic-review-and-meta-analysis
#14
Bob Olsson, Ronald Lautner, Ulf Andreasson, Annika Öhrfelt, Erik Portelius, Maria Bjerke, Mikko Hölttä, Christoffer Rosén, Caroline Olsson, Gabrielle Strobel, Elizabeth Wu, Kelly Dakin, Max Petzold, Kaj Blennow, Henrik Zetterberg
BACKGROUND: Alzheimer's disease biomarkers are important for early diagnosis in routine clinical practice and research. Three core CSF biomarkers for the diagnosis of Alzheimer's disease (Aβ42, T-tau, and P-tau) have been assessed in numerous studies, and several other Alzheimer's disease markers are emerging in the literature. However, there have been no comprehensive meta-analyses of their diagnostic performance. We systematically reviewed the literature for 15 biomarkers in both CSF and blood to assess which of these were most altered in Alzheimer's disease...
June 2016: Lancet Neurology
https://www.readbyqxmd.com/read/26936536/effect-and-mechanism-of-fuzhisan-and-donepezil-on-the-sirtuin-1-pathway-and-amyloid-precursor-protein-metabolism-in-pc12-cells
#15
Peng Guo, Desheng Wang, Xiaomin Wang, Honglin Feng, Ying Tang, Ruihong Sun, Yan Zheng, Lin Dong, Jiaying Zhao, Xin Zhang, Shuyu Wang, Hongxu Sun
The present study aimed to determine the effect and mechanism of fuzhisan (FZS) and donepezil on the SIRT1 signaling pathway and the metabolism of the amyloid precursor protein (APP) in PC12 cells. An experimental cell model of PC12 cells with Aβ25‑35‑induced neurotoxicity was established and cell proliferation was determined by the MTT assay following treatment with donepezil and FZS. In addition, cell apoptosis was determined using DAPI staining and light microscopy. Furthermore, western blot analysis and ELISA were utilized to evaluate the expression levels of associated APP, Aβ40, Aβ42, sAPPα, sAPPβ, ADAM10, sirtuin 1 (SIRT1) and forkhead box O (FoxO) protein...
April 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/26895626/generation-of-aggregation-prone-n-terminally-truncated-amyloid-%C3%AE-peptides-by-meprin-%C3%AE-depends-on-the-sequence-specificity-at-the-cleavage-site
#16
Caroline Schönherr, Jessica Bien, Simone Isbert, Rielana Wichert, Johannes Prox, Hermann Altmeppen, Sathish Kumar, Jochen Walter, Stefan F Lichtenthaler, Sascha Weggen, Markus Glatzel, Christoph Becker-Pauly, Claus U Pietrzik
BACKGROUND: The metalloprotease meprin β cleaves the Alzheimer's Disease (AD) relevant amyloid precursor protein (APP) as a β-secretase reminiscent of BACE-1, however, predominantly generating N-terminally truncated Aβ2-x variants. RESULTS: Herein, we observed increased endogenous sAPPα levels in the brains of meprin β knock-out (ko) mice compared to wild-type controls. We further analyzed the cellular interaction of APP and meprin β and found that cleavage of APP by meprin β occurs prior to endocytosis...
February 19, 2016: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/26843653/single-cell-detection-of-secreted-a%C3%AE-and-sapp%C3%AE-from-human-ipsc-derived-neurons-and-astrocytes
#17
Mei-Chen Liao, Christina R Muratore, Todd M Gierahn, Sarah E Sullivan, Priya Srikanth, Philip L De Jager, J Christopher Love, Tracy L Young-Pearse
UNLABELLED: Secreted factors play a central role in normal and pathological processes in every tissue in the body. The brain is composed of a highly complex milieu of different cell types and few methods exist that can identify which individual cells in a complex mixture are secreting specific analytes. By identifying which cells are responsible, we can better understand neural physiology and pathophysiology, more readily identify the underlying pathways responsible for analyte production, and ultimately use this information to guide the development of novel therapeutic strategies that target the cell types of relevance...
February 3, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/26826190/systems-pharmacology-analysis-of-the-amyloid-cascade-after-%C3%AE-secretase-inhibition-enables-the-identification-of-an-a%C3%AE-42-oligomer-pool
#18
Eline M T van Maanen, Tamara J van Steeg, Maria S Michener, Mary J Savage, Matthew E Kennedy, Huub Jan Kleijn, Julie A Stone, Meindert Danhof
The deposition of amyloid-β (Aβ) oligomers in brain parenchyma has been implicated in the pathophysiology of Alzheimer's disease. Here we present a systems pharmacology model describing the changes in the amyloid precursor protein (APP) pathway after administration of three different doses (10, 30, and 125 mg/kg) of the β-secretase 1 (BACE1) inhibitor MBi-5 in cisterna magna ported rhesus monkeys. The time course of the MBi-5 concentration in plasma and cerebrospinal fluid (CSF) was analyzed in conjunction with the effect on the concentrations of the APP metabolites Aβ42, Aβ40, soluble β-amyloid precursor protein (sAPP) α, and sAPPβ in CSF...
April 2016: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/26748905/validation-of-soluble-amyloid-%C3%AE-precursor-protein-assays-as-diagnostic-csf-biomarkers-for-neurodegenerative-diseases
#19
COMPARATIVE STUDY
Linda J C van Waalwijk van Doorn, Marleen J Koel-Simmelink, Ute Haußmann, Hans Klafki, Hanne Struyfs, Philipp Linning, Hans-Joachim Knölker, Harry Twaalfhoven, H Bea Kuiperij, Sebastiaan Engelborghs, Philip Scheltens, Marcel M Verbeek, Eugeen Vanmechelen, Jens Wiltfang, Charlotte E Teunissen
Analytical validation of a biomarker assay is essential before implementation in clinical practice can occur. In this study, we analytically validated the performance of assays detecting soluble amyloid-β precursor protein (sAPP) α and β in CSF in two laboratories according to previously standard operating procedures serving this goal. sAPPα and sAPPβ ELISA assays from two vendors (IBL-international, Meso Scale Diagnostics) were validated. The performance parameters included precision, sensitivity, dilutional linearity, recovery, and parallelism...
April 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/26661245/role-of-prostacyclin-signaling-in-endothelial-production-of-soluble-amyloid-precursor-protein-%C3%AE-in-cerebral-microvessels
#20
Tongrong He, Anantha Vijay R Santhanam, Tong Lu, Livius V d'Uscio, Zvonimir S Katusic
We tested hypothesis that activation of the prostacyclin (PGI2) receptor (IP receptor) signaling pathway in cerebral microvessels plays an important role in the metabolism of amyloid precursor protein (APP). In human brain microvascular endothelial cells activation of IP receptor with the stable analogue of PGI2, iloprost, stimulated expression of amyloid precursor protein and a disintegrin and metalloprotease 10 (ADAM10), resulting in an increased production of the neuroprotective and anticoagulant molecule, soluble APPα (sAPPα)...
January 2017: Journal of Cerebral Blood Flow and Metabolism
keyword
keyword
119479
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"