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https://www.readbyqxmd.com/read/27936150/oxidative-stress-induces-mouse-follicular-granulosa-cells-apoptosis-via-jnk-foxo1-pathway
#1
Qiannan Weng, Zequn Liu, Bojiang Li, Kaiqing Liu, Wangjun Wu, Honglin Liu
The c-Jun N-terminal protein kinase (JNK) plays an important role in the regulation of cell apoptosis. Forkhead box O (FoxO) transcription factors are involved in diverse biological processes, including cellular metabolism, cell apoptosis, and cell cycle. However, the JNK/FoxO1 pathway involved in the process of apoptosis induced by oxidative stress remains to be elucidated. Here, we demonstrated that the JNK activity significantly increased in response to oxidative stress in mouse follicular granulosa cells (MGCs)...
2016: PloS One
https://www.readbyqxmd.com/read/27929803/an-autopsy-verified-case-of-ftld-tdp-type-a-with-upper-motor-neuron-predominant-motor-neuron-disease-mimicking-mm2-thalamic-type-sporadic-creutzfeldt-jakob-disease
#2
Yuichi Hayashi, Yasushi Iwasaki, Akira Takekoshi, Nobuaki Yoshikura, Takahiko Asano, Maya Mimuro, Akio Kimura, Katsuya Satoh, Tetsuyuki Kitamoto, Mari Yoshida, Takashi Inuzuka
Here we report an autopsy-verified case of frontotemporal lobar degeneration (FTLD)-transactivation responsive region (TAR) DNA binding protein (TDP) type A with upper motor neuron-predominant motor neuron disease mimicking MM2-thalamic-type sporadic Creutzfeldt-Jakob disease (sCJD). A 69-year-old woman presented with an 11-month history of progressive dementia, irritability, insomnia, and gait disturbance without a family history of dementia or prion disease. Neurological examination revealed severe dementia, frontal signs, and exaggerated bilateral tendon reflexes...
November 2016: Prion
https://www.readbyqxmd.com/read/27929120/neurofilaments-in-blood-and-csf-for-diagnosis-and-prediction-of-onset-in-creutzfeldt-jakob-disease
#3
Petra Steinacker, Kaj Blennow, Steffen Halbgebauer, Song Shi, Viktoria Ruf, Patrick Oeckl, Armin Giese, Jens Kuhle, Dana Slivarichova, Henrik Zetterberg, Markus Otto
While cerebrospinal fluid (CSF) biomarkers for Creutzfeldt-Jakob disease (CJD) are established and partly included in the diagnostic criteria, no blood biomarkers are available. Here, we assessed the utility of serum neurofilament light chain (NF-L) and tau protein in comparison to CSF markers (NF-L and phosphorylated NF heavy chain (pNF-H), tau, S100B, 14-3-3) and prion conversion assay (real-time quaking induced conversion (RT-QuIC)) for sporadic and genetic CJD. Importantly, a Gerstmann-Sträussler-Scheinker mutation carrier in the asymptomatic phase and at disease onset was included as well...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924124/arsenic-stress-affects-the-expression-profile-of-genes-of-14-3-3-proteins-in-the-shoot-of-mycorrhiza-colonized-rice
#4
Varsha Pathare, Sudhakar Srivastava, Balasaheb V Sonawane, Penna Suprasanna
The intimate association between the arbuscular mycorrhizal fungi and host plants helps the latter in phosphate acquisition in exchange of carbohydrates and in enhanced stress tolerance. Similarly, the ubiquitous 14-3-3 protein family is known to be a major regulator of plant metabolism and stress responses. However, the involvement of mycorrhiza and plant 14-3-3 proteins interaction in plant response to environmental stimuli, such as arsenic (As) stress, is yet unknown. In this study, we analysed the impact of the As stress on the expression profile of 14-3-3 genes in the shoot of mycorrhiza colonized rice (Oryza sativa) plants...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27922054/first-insight-into-the-proteome-landscape-of-the-porcine-short-posterior-ciliary-arteries-key-signalling-pathways-maintaining-physiologic-functions
#5
Caroline Manicam, Natarajan Perumal, Norbert Pfeiffer, Franz H Grus, Adrian Gericke
Short posterior ciliary arteries (sPCA) provide the major blood supply to the optic nerve head. Emerging evidence has linked structural and functional anomalies of sPCA to the pathogenesis of several ocular disorders that cause varying degrees of visual loss, particularly anterior ischaemic optic neuropathy and glaucoma. Although the functional relevance of this vascular bed is well-recognized, the proteome of sPCA remains uncharacterized. Since the porcine ocular system closely resembles that of the human's and is increasingly employed in translational ophthalmic research, this study characterized the proteome of porcine sPCA employing the mass spectrometry-based proteomics strategy...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919027/phosphorylation-of-janus-kinase-1-jak1-by-amp-activated-protein-kinase-ampk-links-energy-sensing-to-anti-inflammatory-signaling
#6
Claire Rutherford, Claire Speirs, Jamie J L Williams, Marie-Ann Ewart, Sarah J Mancini, Simon A Hawley, Christian Delles, Benoit Viollet, Ana P Costa-Pereira, George S Baillie, Ian P Salt, Timothy M Palmer
Adenosine 5'-monophosphate-activated protein kinase (AMPK) is a pivotal regulator of metabolism at cellular and organismal levels. AMPK also suppresses inflammation. We found that pharmacological activation of AMPK rapidly inhibited the Janus kinase (JAK)-signal transducer and activator of transcription (STAT) pathway in various cells. In vitro kinase assays revealed that AMPK directly phosphorylated two residues (Ser(515) and Ser(518)) within the Src homology 2 domain of JAK1. Activation of AMPK enhanced the interaction between JAK1 and 14-3-3 proteins in cultured vascular endothelial cells and fibroblasts, an effect that required the presence of Ser(515) and Ser(518) and was abolished in cells lacking AMPK catalytic subunits...
November 8, 2016: Science Signaling
https://www.readbyqxmd.com/read/27904785/overexpression-of-ywhaz-as-an-independent-prognostic-factor-in-adenocarcinoma-of-the-esophago-gastric-junction
#7
Nobuyuki Watanabe, Shuhei Komatsu, Daisuke Ichikawa, Mahito Miyamae, Takuma Ohashi, Wataru Okajima, Toshiyuki Kosuga, Hirotaka Konishi, Atsushi Shiozaki, Hitoshi Fujiwara, Kazuma Okamoto, Hitoshi Tsuda, Eigo Otsuji
Several studies have demonstrated that YWHAZ (14-3-3ζ), included in the 14-3-3 family of proteins, is implicated in the initiation and progression of cancers. To detect a novel treatment target for adenocarcinoma of the esophagogastric junction (AEG), we tested whether YWHAZ acted as a cancer-promoting gene through its overexpression in AEG. We analyzed YWHAZ protein expression in 92 consecutive primary AEG tumors, which had been curatively resected in our institution between 2000 and 2010. Overexpression of the YWHAZ protein was frequently detected in primary AEG tumor samples (46% (42/92))...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27897387/small-molecule-induced-and-cooperative-enzyme-assembly-on-a-14-3-3-scaffold
#8
Anniek den Hamer, Lenne Lemmens, Minke Nijenhuis, Christian Ottmann, Maarten Merkx, Tom de Greef, Luc Brunsveld
Scaffold proteins regulate cell signaling by promoting the proximity of putative interaction partners. While frequently applied in a cellular setting, their fundamental understanding, amongst other in terms of quantitative parameters, has been lagging behind. Here we present a scaffold protein platform based on the native 14-3-3 dimeric protein and under the control of a small-molecule, which allows to be studied in an in vitro setting and mathematically described. Robust small-molecule regulation of caspase-9 activity via induced dimerization on the 14-3-3 scaffold was demonstrated...
November 29, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/27893164/diagnostic-and-prognostic-value-of-human-prion-detection-in-cerebrospinal-fluid
#9
Aaron Foutz, Brian S Appleby, Clive Hamlin, Xiaoqin Liu, Sheng Yang, Yvonne Cohen, Wei Chen, Janis Blevins, Cameron Fausett, Han Wang, Pierluigi Gambetti, Shulin Zhang, Andrew Hughson, Curtis Tatsuoka, Lawrence B Schonberger, Mark L Cohen, Byron Caughey, Jiri G Safar
Objective-Several prion amplification systems have been proposed for detection of prions in cerebrospinal fluid (CSF), most recently, the measurements of prion seeding activity with second-generation real-time quaking-induced conversion (RT-QuIC). The objective of this study was to investigate the diagnostic performance of the RT-QuIC prion test in the broad phenotypic spectrum of prion diseases. Methods- We performed CSF RT-QuIC testing in 2,141 patients who had rapidly progressive neurological disorders, determined diagnostic sensitivity and specificity in 272 cases which were autopsied, and evaluated the impact of mutations and polymorphisms in the PRNP gene, and Type 1 or Type 2 of human prions on diagnostic performance...
November 28, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/27886009/diagnostic-accuracy-of-a-combined-analysis-of-cerebrospinal-fluid-t-prp-t-tau-p-tau-and-a%C3%AE-42-in-the-differential-diagnosis-of-creutzfeldt-jakob-disease-from-alzheimer-s-disease-with-emphasis-on-atypical-disease-variants
#10
Samir Abu Rumeileh, Francesca Lattanzio, Michelangelo Stanzani Maserati, Romana Rizzi, Sabina Capellari, Piero Parchi
According to recent studies, the determination of cerebrospinal fluid (CSF) total tau (t-tau)/phosphorylated tau (p-tau) ratio and total prion protein (t-PrP) levels significantly improves the accuracy of the diagnosis of Alzheimer's disease (AD) in atypical cases with clinical or laboratory features mimicking Creutzfeldt-Jakob disease (CJD). However, this has neither been validated nor tested in series including atypical CJD variants. Furthermore, the added diagnostic value of amyloid-β (Aβ)42 remains unclear...
November 19, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27873207/profiling-phosphopeptide-binding-domain-recognition-specificity-using-peptide-microarrays
#11
Michele Tinti, Simona Panni, Gianni Cesareni
Cellular organization and response to internal and external stimuli are mediated by an intricate web of protein interactions. Some of these interactions are regulated by covalent posttranslational modifications such as phosphorylation and acetylation. These modifications can change the chemical nature of the interaction interfaces and modulate the binding affinity of the interacting partners. In signal transduction, the most frequent modification is reversible phosphorylation of tyrosine, serine or threonine residues...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27872148/proteomics-screen-identifies-class-i-rab11-fips-as-key-regulators-of-cytokinesis
#12
Carl Laflamme, Jacob A Galan, Khaled Ben El Kadhi, Antoine Méant, Carlos Zeledon, Sébastien Carréno, Philippe P Roux, Gregory Emery
The 14-3-3 protein family orchestrates a complex network of molecular interactions that regulates various biological processes. Owing to their role in regulating the cell cycle and protein trafficking, 14-3-3 proteins are prevalent in human diseases, such as cancer, diabetes and neurodegeneration. 14-3-3 proteins are expressed in all eukaryotic cells, suggesting that they mediate their biological functions through evolutionarily conserved protein interactions. To identify these core 14-3-3 client proteins, we used an affinity-based proteomics approach to characterize and compare the human and Drosophila 14-3-3 interactome...
November 21, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27860220/k-bilds-a-kinase-substrate-discovery-tool
#13
D Maheeka Embogama, Mary Kay H Pflum
Kinases catalyze protein phosphorylation to regulate cell signaling events.However, identifying kinase substrates is challenging due to the often low abundance and dynamic nature of protein phosphorylation. Development of novel techniques to identify kinase substrates is necessary. Here, we report K-BILDS (Kinase-catalyzed Biotinylation with Inactivated Lysates for Discovery of Substrates) as a tool to identify direct substrates of a kinase. As a proof of concept, K-BILDS was applied to PKA (cAMP-dependent protein kinase A) using HeLa cell lysates...
November 17, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/27852982/regulation-of-human-cerebrospinal-fluid-malate-dehydrogenase-1-in-sporadic-creutzfeldt-jakob-disease-patients
#14
Matthias Schmitz, Franc Llorens, Alexander Pracht, Tobias Thom, Ângela Correia, Saima Zafar, Isidre Ferrer, Inga Zerr
The identification of reliable diagnostic biomarkers in differential diagnosis of neurodegenerative diseases is an ongoing topic. A previous two-dimensional proteomic study on cerebrospinal fluid (CSF) revealed an elevated level of an enzyme, mitochondrial malate dehydrogenase 1 (MDH1), in sporadic Creutzfeldt-Jakob disease (sCJD) patients. Here, we could demonstrate the expression of MDH1 in neurons as well as in the neuropil. Its levels are lower in sCJD brains than in control brains. An examination of CSF-MDH1 in sCJD patients by ELISA revealed a significant elevation of CSF-MDH1 levels in sCJD patients (independently from the PRNP codon 129 MV genotype or the prion protein scrapie (PrP(Sc)) type) in comparison to controls...
November 14, 2016: Aging
https://www.readbyqxmd.com/read/27842457/wharton-s-jelly-mesenchymal-stem-cells-protect-the-immature-brain-in-rats-and-modulate-cell-fate
#15
Martin Mueller, Byron Oppliger, Marianne Jörger-Messerli, Ursula Reinhart, Eytan Barnea, Michael Paidas, Boris Kramer, Daniel Surbek, Andreina Schoeberlein
The development of a mammalian brain is a complex and long-lasting process. Not surprisingly, preterm birth is the leading cause of death in newborns and children. Advances in perinatal care reduced mortality but morbidity still represents a major burden. New therapeutic approaches are thus desperately needed. Given that mesenchymal stem/stromal cells (MSCs) emerged as a promising candidate for cell therapy, we transplanted MSCs derived from the Wharton`s jelly (WJ-MSCs) to reduce the burden of immature brain injury in a murine animal model...
November 14, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27833227/creutzfeldt-jakob-disease-phenotype-and-course-our-experience-from-a-tertiary-center
#16
Sadanandavalli Retnaswami Chandra, Thomas Gregor Issac, Mariamma Philip, Veeranna Gadad
INTRODUCTION: Prion diseases are protein conformation disorders and neither caused by viroid or virus but is a transmissible particle labeled a prion by Pruisner. Normal prion protein becomes infectious by a different folding, but the triggers are not known. Based on the characteristic brain pathology, they are grouped under spongiform encephalopathy affecting both man and animals. Estimated prevalence is one per million. Creutzfeldt-Jakob disease (CJD) registry from National Institute and Neurosciences (NIMHANS), Bengaluru, reported 69 cases in 30 years...
September 2016: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/27827352/crystal-structures-of-a-yeast-14-3-3-protein-from-lachancea-thermotolerans-in-the-unliganded-form-and-bound-to-a-human-lipid-kinase-pi4kb-derived-peptide-reveal-high-evolutionary-conservation
#17
Andrea Eisenreichova, Martin Klima, Evzen Boura
14-3-3 proteins bind phosphorylated binding partners to regulate several of their properties, including enzymatic activity, stability and subcellular localization. Here, two crystal structures are presented: the crystal structures of the 14-3-3 protein (also known as Bmh1) from the yeast Lachancea thermotolerans in the unliganded form and bound to a phosphopeptide derived from human PI4KB (phosphatidylinositol 4-kinase B). The structures demonstrate the high evolutionary conservation of ligand recognition by 14-3-3 proteins...
November 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27826658/a-tbc1d1-ser231ala-knockin-mutation-partially-impairs-aicar-but-not-exercise-induced-muscle-glucose-uptake-in-mice
#18
Qiaoli Chen, Bingxian Xie, Sangsang Zhu, Ping Rong, Yang Sheng, Serge Ducommun, Liang Chen, Chao Quan, Min Li, Kei Sakamoto, Carol MacKintosh, Shuai Chen, Hong Yu Wang
AIMS/HYPOTHESIS: TBC1D1 (tre-2/USP6, BUB2, cdc16 domain family member 1) is a Rab GTPase-activating protein (RabGAP) that has been implicated in regulating GLUT4 trafficking. TBC1D1 can be phosphorylated by the AMP-activated protein kinase (AMPK) on Ser(231), which consequently interacts with 14-3-3 proteins. Given the key role for AMPK in regulating insulin-independent muscle glucose uptake, we hypothesised that TBC1D1-Ser(231) phosphorylation and/or 14-3-3 binding may mediate AMPK-governed glucose homeostasis...
November 8, 2016: Diabetologia
https://www.readbyqxmd.com/read/27816513/the-longissimus-thoracis-muscle-proteome-in-alentejana-bulls-as-affected-by-growth-path
#19
André M Almeida, Paolo Nanni, Ana M Ferreira, Claudia Fortes, Jonas Grossmann, Rui J B Bessa, Paulo Costa
Beef production is an important economic activity. In Southern Europe there are two types of beef production systems based on growth paths: continuous (CG) versus discontinuous growth (DG). DG is a traditional system dependent on pasture; whereas in CG animals are supplemented on concentrate feed. We compare the protein abundance profiles of the longissimus thoracis (LT) muscle in CG and DG animals using label-free quantitative proteomics. Twenty three Alentejana male calves (9months-old, 239kg live-weight) were allocated to two feeding regimens...
November 2, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27809771/proteomic-analysis-of-maize-grain-development-using-itraq-reveals-temporal-programs-of-diverse-metabolic-processes
#20
Tao Yu, Geng Li, Shuting Dong, Peng Liu, Jiwang Zhang, Bin Zhao
BACKGROUND: Grain development in maize is an essential process in the plant's life cycle and is vital for use of the plant as a crop for animals and humans. However, little is known regarding the protein regulatory networks that control grain development. Here, isobaric tag for relative and absolute quantification (iTRAQ) technology was used to analyze temporal changes in protein expression during maize grain development. RESULTS: Maize grain proteins and changes in protein expression at eight developmental stages from 3 to 50 d after pollination (DAP) were performed using iTRAQ-based proteomics...
November 4, 2016: BMC Plant Biology
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