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https://www.readbyqxmd.com/read/28442994/egf-enhances-oligodendrogenesis-from-glial-progenitor-cells
#1
Junlin Yang, Xuejun Cheng, Jiajun Qi, Binghua Xie, Xiaofeng Zhao, Kang Zheng, Zunyi Zhang, Mengsheng Qiu
Emerging evidence indicates that epidermal growth factor (EGF) signaling plays a positive role in myelin development and repair, but little is known about its biological effects on the early generation and differentiation of oligodendrocyte (OL) lineage cells. In this study, we investigated the role of EGF in early OL development with isolated glial restricted precursor (GRP) cells. It was found that EGF collaborated with Platelet Derived Growth Factor-AA (PDGFaa) to promote the survival and self-renewal of GRP cells, but predisposed GRP cells to develop into O4(-) early-stage oligodendrocyte precursor cells (OPCs) in the absence of or PDGFaa...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28438648/the-superoxide-dismutase-mimetic-tempol-blunts-diabetes-induced-upregulation-of-nadph-oxidase-and-endoplasmic-reticulum-stress-in-a-rat-model-of-diabetic-nephropathy
#2
Miles J De Blasio, Anand Ramalingam, Anh H Cao, Darnel Prakoso, Ji-Ming Ye, Raelene Pickering, Anna M D Watson, Judy B de Haan, David M Kaye, Rebecca H Ritchie
Endoplasmic reticulum (ER) stress contributes to progression of diabetic nephropathy, which promotes end-stage renal failure in diabetic patients. This study was undertaken to investigate the actions of tempol and ramipril, pharmacological agents that target the consequences of NADPH oxidase, on diabetic nephropathy in a rat model of type 1 diabetes, with an emphasis on markers of ER stress. Male Sprague-Dawley rats were injected intravenously with a single bolus of streptozotocin (55mg/kg) to induce type 1 diabetes...
April 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28436294/overexpression-of-vla-4-in-glial-restricted-precursors-enhances-their-endothelial-docking-and-induces-diapedesis-in-a-mouse-stroke-model
#3
Anna Jablonska, Daniel J Shea, Suyi Cao, Jeff Wm Bulte, Miroslaw Janowski, Konstantinos Konstantopoulos, Piotr Walczak
The loss of oligodendrocytes after stroke is one of the major causes of secondary injury. Glial-restricted progenitors (GRPs) have remylenating potential after intraparenchymal cerebral transplantation. The intraarterial (IA) injection route is an attractive gateway for global brain delivery, but, after IA infusion, naive GRPs fail to bind to the cerebral vasculature. The aim of this study was to test whether overexpression of Very Late Antigen-4 (VLA-4) increases endothelial docking and cerebral homing of GRPs in a stroke model...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28433751/elevated-chaperone-proteins-are-a-feature-of-winter-freeze-avoidance-by-larvae-of-the-goldenrod-gall-moth-epiblema-scudderiana
#4
Guijun Zhang, Janet M Storey, Kenneth B Storey
Winter survival for many insect species includes a need to maintain metabolic homeostasis and structural/functional integrity of macromolecules not only over a wide range of cold temperatures but also in response to rapid temperature change. Chaperones are well-known to protect/stabilize protein structure with regard to heat stress but less is known about their potential involvement in long-term protection of the proteome at subzero temperatures. The present study assessed the participation of chaperone proteins in the cold hardiness of larvae of the goldenrod gall moth, Epiblema scudderiana (Clemens) (Lepidoptera, Olethreutidae), monitoring changes in nine proteins over the winter months as well as their responses to laboratory cold acclimation or anoxia exposure...
April 19, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28432554/epigallocatechin-gallate-protects-beas-2b-cells-from-lipopolysaccharide-induced-apoptosis-through-upregulation-of-gastrin-releasing-peptide
#5
Peethambaran Divya, Bijesh Puthusseri, Denny Joseph Kollareth Manual, Mohammed Azharuddin Savanur
Gastrin-releasing peptide (GRP) plays a major role in the development and maintenance of lung epithelial cells by promoting cell division, whereas its suppression causes growth arrest and apoptosis. The present study shows that human bronchial epithelial BEAS-2B cells challenged with lipopolysaccharide (LPS), an endotoxin from gram-negative bacteria, downregulated GRP expression and induced apoptosis via upregulation of p53 and active caspase-3, signifying the importance of GRP in lung epithelial cell survival...
April 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28425050/oxidative-protein-modification-alters-proteostasis-under-acute-hypobaric-hypoxia-in-skeletal-muscles-a-comprehensive-in-vivo-study
#6
Akanksha Agrawal, Richa Rathor, Geetha Suryakumar
While numerous maladies are associated with hypobaric hypoxia, muscle protein loss is an important under studied topic. Hence, the present study was designed to investigate the mechanism of muscle protein loss at HH. SD rats were divided into normoxic rats, while remaining rats were exposed to simulated hypoxia equivalent to 282-torr pressure (equal to an altitude of 7620 m, 8% oxygen), at 25 °C for 6, 12, and 24 h. Post-exposure rats were sacrificed and analysis was performed. Ergo, muscle loss-related changes were observed at 12 and 24 h post-HH exposure...
April 19, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28413731/meloxicam-ameliorates-the-cartilage-and-subchondral-bone-deterioration-in-monoiodoacetate-induced-rat-osteoarthritis
#7
Előd Nagy, Enikő Vajda, Camil Vari, Sándor Sipka, Ana-Maria Fárr, Emőke Horváth
OBJECTIVE: This study aimed to quantify the cartilage- and subchondral bone-related effects of low-dose and high-dose meloxicam treatment in the late phase of mono-iodoacetate-induced osteoarthritis of the stifle. METHODS: Thirty-four male Wistar rats received intra-articular injection of mono-iodoacetate to trigger osteoarthritis; 10 control animals (Grp Co) received saline. The mono-iodoacetate-injected rats were assigned to three groups and treated from week 4 to the end of week 7 with placebo (Grp P, n = 11), low-dose (GrpM Lo, 0...
2017: PeerJ
https://www.readbyqxmd.com/read/28365862/spinal-mechanisms-of-itch-transmission
#8
REVIEW
Devin M Barry, Admire Munanairi, Zhou-Feng Chen
Peripheral itch stimuli are transmitted by sensory neurons to the spinal cord dorsal horn, which then transmits the information to the brain. The molecular and cellular mechanisms within the dorsal horn for itch transmission have only been investigated and identified during the past ten years. This review covers the progress that has been made in identifying the peptide families in sensory neurons and the receptor families in dorsal horn neurons as putative itch transmitters, with a focus on gastrin-releasing peptide (GRP)-GRP receptor signaling...
April 1, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28343134/exfoliated-graphene-nanosheets-ph-sensitive-drug-carrier-and-anti-cancer-activity
#9
Nisha Tyagi, Nour F Attia, Kurt E Geckeler
A straightforward and facile method for the exfoliation of graphene sheets using poly(vinylpyrrolidone) nanoparticles of an average size of 42nm was developed and their dual role as pH-sensitive drug carrier and anti-cancer agent was evaluated. The cytotoxic impact of the exfoliated nanosheets (GRP-PVP-NP) was examined on various cells (HCT-116, HeLa, SCC-9, NIH-3T3 and HEK-293cells) by a series of assays. Their cytotoxic nature was attributed to affecting the mitochondrial enzyme activity, proliferation capability, and the formation of tight junctions in cancer cells...
March 16, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28326616/high-prevalence-of-sensitization-to-gibberellin-regulated-protein-peamaclein-in-fruit-allergies-with-negative-immunoglobulin-e-reactivity-to-bet-v-1-homologs-and-profilin-clinical-pattern-causative-fruits-and-cofactor-effect-of-gibberellin-regulated-protein
#10
Naoko Inomata, Mami Miyakawa, Michiko Aihara
Gibberellin-regulated protein (GRP) is a new allergen in peach allergy, with an amino acid sequence very well conserved through several botanical species. We investigated the allergenicity of GRP in fruit allergies other than peaches and identified the clinical characteristics of fruit allergy patients with GRP sensitization. One hundred consecutive Japanese patients with fruit allergies were enrolled in the present study. To identify the features of GRP sensitization, we selected patients with negative ImmunoCAP results for Bet v 1 homologs and profilin, which are marker allergens for pollen-food allergy syndrome (PFAS), or lipid transfer protein...
March 22, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28325753/mouse-model-for-inherited-renal-fibrosis-associated-with-endoplasmic-reticulum-stress
#11
Sian E Piret, Eric Olinger, Anita A C Reed, M Andrew Nesbit, Tertius A Hough, Liz Bentley, Olivier Devuyst, Roger Cox, Rajesh V Thakker
Renal fibrosis is a common feature of renal failure resulting from multiple aetiologies, including diabetic nephropathy, hypertension and inherited renal disorders. However, the mechanisms of renal fibrosis are incompletely understood and we therefore explored these by establishing a mouse model for a renal tubular disorder, referred to as autosomal dominant tubulointerstitial kidney disease (ADTKD) due to missense uromodulin (UMOD) mutations (ADTKD-UMOD). ADTKD-UMOD, which is associated with retention of mutant uromodulin in the endoplasmic reticulum (ER) of renal thick ascending limb cells, is characterized by hyperuricemia, interstitial fibrosis, inflammation, and renal failure, and we used targeted homologous recombination to generate a knock-in mouse model with an ADTKD-causing missense cysteine to arginine uromodulin mutation (C125R)...
March 21, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28294183/the-endoplasmic-reticulum-stress-autophagy-pathway-is-involved-in-cholesterol-induced-pancreatic-%C3%AE-cell-injury
#12
Fei-Juan Kong, Jia-Hua Wu, Shui-Ya Sun, Jia-Qiang Zhou
Lipotoxicity has been implicated in pancreatic β-cell dysfunction in type 2 diabetes, but the exact mechanisms remain unknown. The current study explored the role of the endoplasmic reticulum (ER) stress pathway in cholesterol-induced lipotoxicity. Two different insulinoma cell lines were treated with cholesterol with or without inhibitors. ER stress-associated proteins glucose-regulated protein (GRP) 78, activating transcription factor (ATF) 4 and C/EBP homologous protein (CHOP), as was phosphorylation of eukaryotic initiation factor (EIF) 2α, were all up-regulated by cholesterol...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28287418/dietary-broccoli-alters-rat-cecal-microbiota-to-improve-glucoraphanin-hydrolysis-to-bioactive-isothiocyanates
#13
Xiaoji Liu, Yanling Wang, Jennifer L Hoeflinger, Bárbara P Neme, Elizabeth H Jeffery, Michael J Miller
Broccoli consumption brings many health benefits, including reducing the risk of cancer and inflammatory diseases. The objectives of this study were to identify global alterations in the cecal microbiota composition using 16S rRNA sequencing analysis and glucoraphanin (GRP) hydrolysis to isothiocyanates ex vivo by the cecal microbiota, following different broccoli diets. Rats were randomized to consume AIN93G (control) or different broccoli diets; AIN93G plus cooked broccoli, a GRP-rich powder, raw broccoli, or myrosinase-treated cooked broccoli...
March 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28283917/risk-perception-and-psychological-distress-in-genetic-counselling-for-hereditary-breast-and-or-ovarian-cancer
#14
G Cicero, R De Luca, P Dorangricchia, G Lo Coco, C Guarnaccia, D Fanale, V Calò, A Russo
Oncological Genetic Counselling (CGO) allows the identification of a genetic component that increases the risk of developing a cancer. Individuals' psychological reactions are influenced by both the content of the received information and the subjective perception of their own risk of becoming ill or being a carrier of a genetic mutation. This study included 120 participants who underwent genetic counselling for breast and/or ovarian cancer. The aim of the study was to examine the relation between their cancer risk perception and the genetic risk during CGO before receiving genetic test results, considering the influence of some psychological variables, in particular distress, anxiety and depression...
March 10, 2017: Journal of Genetic Counseling
https://www.readbyqxmd.com/read/28281668/assessing-the-spatiotemporal-variation-and-impact-factors-of-net-primary-productivity-in-china
#15
Xue Wang, Kun Tan, Baozhang Chen, Peijun Du
In this study, the net primary productivity (NPP) in China from 2001 to 2012 was estimated based on the Carnegie-Ames-Stanford Approach (CASA) model using Moderate Resolution Imaging Spectroradiometer (MODIS) and meteorological datasets, and the accuracy was verified by a ChinaFLUX dataset. It was found that the spatiotemporal variations in NPP present a downward trend with the increase of latitude and longitude. Moreover, the influence of climate change on the evolution of NPP shows that NPP has had different impact factors in different regions and periods over the 12 years...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28245119/identification-of-non-nucleoside-inhibitors-of-the-respiratory-syncytial-virus-polymerase-complex
#16
Alberto Jiménez-Somarribas, Shuli Mao, Jeong-Joong Yoon, Marco Weisshaar, Robert M Cox, Jose R Marengo, Deborah G Mitchell, Zachary P Morehouse, Dan Yan, Ivan Solis, Dennis C Liotta, Michael G Natchus, Richard K Plemper
Respiratory syncytial virus (RSV) represents a threat to infants, the elderly, and the immunocompromised. RSV entry blockers are in clinical trials, but escape mutations challenge their potential. In search of RSV inhibitors, we have integrated a signature resistance mutation into a recombinant RSV virus and applied the strain to high-throughput screening. Counterscreening of candidates returned 14 confirmed hits with activities in the nano- to low-micromolar range. All blocked RSV polymerase activity in minigenome assays...
March 13, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28231466/leaky-gate-model-intensity-dependent-coding-of-pain-and-itch-in-the-spinal-cord
#17
Shuohao Sun, Qian Xu, Changxiong Guo, Yun Guan, Qin Liu, Xinzhong Dong
Coding of itch versus pain has been heatedly debated for decades. However, the current coding theories (labeled line, intensity, and selectivity theory) cannot accommodate all experimental observations. Here we identified a subset of spinal interneurons, labeled by gastrin-releasing peptide (Grp), that receive direct synaptic input from both pain and itch primary sensory neurons. When activated, these Grp(+) neurons generated rarely seen, simultaneous robust pain and itch responses that were intensity dependent...
February 22, 2017: Neuron
https://www.readbyqxmd.com/read/28231458/gate-control-theory-springs-a-leak
#18
Paula J S Pereira, Ethan A Lerner
Sun and colleagues (2017) find that individual Grp+ spinal interneurons can respond to and distinguish between stimuli that provoke itch or pain. The nociceptive response is limited by enkaphalin-expressing interneurons that are connected synaptically to the Grp+ neurons.
February 22, 2017: Neuron
https://www.readbyqxmd.com/read/28230494/application-of-tem-techniques-for-the-study-of-vascular-calcification-monitoring-extracellular-vesicles-and-nanogold-immunodetection-of-fetuin-a-grp-and-cd9
#19
Rute Morais, Carla S B Viegas, Dina C Simes, António P A Matos, Anjos L Macedo
No abstract text is available yet for this article.
January 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28230031/serum-pro-gastrin-releasing-peptide-in-diagnosis-of-small-cell-lung-cancer-a-meta-analysis
#20
Hongyuan Wang, Junfeng Qian
OBJECTIVE: The purpose of this study was to assess the diagnostic sensitivity and specificity for serum pro-gastrin-releasing peptide (Pro-GRP) in diagnosis of small cell lung cancer (SCLC) through pooling all the open published data. MATERIALS AND METHODS: Databases of PubMed, Cochrane, ISI Web of Knowledge, and CNKI were electronic, searched by two reviewers to find the diagnostic study serum Pro-GRP in diagnosis of SCLC. The diagnostic sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and area under the receiver operating characteristic (ROC) were calculated by Med DiSc1...
December 2016: Journal of Cancer Research and Therapeutics
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