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https://www.readbyqxmd.com/read/28822083/alfalfa-derived-hsp70-administered-intranasally-improves-insulin-sensitivity-in-mice
#1
Michael Tytell, Ashley T Davis, Jareca Giles, Lauren C Snider, Ruoyu Xiao, Stephen G Dozier, Tennille D Presley, Kylie Kavanagh
Heat shock protein (HSP) 70 is an abundant cytosolic chaperone protein that is deficient in insulin-sensitive tissues in diabetes and unhealthy aging, and is considered a longevity target. It is also protective in neurological disease models. Using HSP70 purified from alfalfa and administered as an intranasal solution, we tested in whether the administration of Hsp70 to diet-induced diabetic mice would improve insulin sensitivity. Both the 10 and 40 μg given three times per week for 26 days significantly improved the response to insulin...
August 18, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28818478/mutations-in-ddhd1-encoding-a-phospholipase-a1-is-a-novel-cause-of-retinopathy-and-neurodegeneration-with-brain-iron-accumulation
#2
Rodolphe Dard, Claire Meyniel, Valérie Touitou, Giovanni Stevanin, Foudil Lamari, Alexandra Durr, Claire Ewenczyk, Fanny Mochel
Defects of phospholipids remodelling and synthesis are inborn errors of metabolism responsible for various clinical presentations including spastic paraplegia, retinopathy, optic atrophy, myo- and cardiomyopathies, and osteo-cutaneous manifestations. DDHD1 encodes a phospholipase A1, which is involved in the remodelling of phospholipids. We previously described a relatively pure hereditary spastic paraplegia (HSP) phenotype associated with mutations in DDHD1. Here we report a complex form of HSP associated with retinal dystrophy and a pattern of neurodegeneration with brain iron accumulation (NBIA) on brain MRI, due to a novel homozygous mutation in DDHD1...
August 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28814727/disruption-of-the-structural-and-functional-features-of-surfactant-protein-a-by-acrolein-in-cigarette-smoke
#3
Rina Takamiya, Koji Uchida, Takahiro Shibata, Toshitaka Maeno, Masaki Kato, Yoshiki Yamaguchi, Shigeru Ariki, Yoshihiro Hasegawa, Atsushi Saito, Soichi Miwa, Hiroki Takahashi, Takaaki Akaike, Yoshio Kuroki, Motoko Takahashi
The extent to which defective innate immune responses contribute to chronic obstructive pulmonary disease (COPD) is not fully understood. Pulmonary surfactant protein A (SP-A) plays an important role in regulating innate immunity in the lungs. In this study, we hypothesised that cigarette smoke (CS) and its component acrolein might influence pulmonary innate immunity by affecting the function of SP-A. Indeed, acrolein-modified SP-A was detected in the lungs of mice exposed to CS for 1 week. To further confirm this finding, recombinant human SP-A (hSP-A) was incubated with CS extract (CSE) or acrolein and then analysed by western blotting and nanoscale liquid chromatography-matrix-assisted laser desorption/ionisation time-of-flight tandem mass spectrometry...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28812766/modulatory-effects-of-arginine-glutamine-and-branched-chain-amino-acids-on-heat-shock-proteins-immunity-and-antioxidant-response-in-exercised-rats
#4
Carolina Soares Moura, Pablo Christiano Barboza Lollo, Priscila Neder Morato, Eder Muller Risso, Jaime Amaya-Farfan
Heat shock proteins (HSPs) are endogenous proteins whose function is to maintain the cell's tolerance to insult, and glutamine supplementation is known to increase HSP expression during intense exercise. Since few studies have addressed the possibility that supplementation with other amino acids could have similar effects to that of glutamine, our objective was to evaluate the effects of leucine, valine, isoleucine and arginine as potential stimulators of HSPs 25, 60, 70 and 90 in rats subjected to acute exercise as a stressing factor...
August 16, 2017: Food & Function
https://www.readbyqxmd.com/read/28812232/introgression-of-heat-shock-protein-hsp70-and-shsp-genes-into-the-malaysian-elite-chilli-variety-kulai-capsicum-annuum-l-through-the-application-of-marker-assisted-backcrossing-mab
#5
Magaji G Usman, Mohd Y Rafii, Mohammad Y Martini, Oladosu A Yusuff, Mohd R Ismail, Gous Miah
Backcrossing together with simple sequence repeat marker strategy was adopted to improve popular Malaysian chilli Kulai (Capsicum annuum L.) for heat tolerance. The use of molecular markers in backcross breeding and selection contributes significantly to overcoming the main drawbacks such as increase linkage drag and time consumption, in the ancient manual breeding approach (conventional), and speeds up the genome recovery of the recurrent parent. The strategy was adopted to introgress heat shock protein gene(s) from AVPP0702 (C...
August 15, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28810623/evaluation-of-heat-shock-protein-hsp-72-expression-in-retinal-ganglion-cells-of-rats-with-glaucoma
#6
Guo-Hua Wang, Yi-Qiao Xing
The present study was planned to observe the expression of heat shock protein 72 (HSP72) in retina of rats in a glaucoma model. A total of 50 Wistar rats were randomly divided into the high intraocular tension group (glaucoma model) and the sham control (sham operation) group. Glaucoma rat models were created by application of electrocoagulation on at least three groups of veins, reduction of venous return of aqueous humor and by enhancement of intraocular tension at the same time; 1, 2, 3, 4 and 8 weeks after operation, the intraocular tension of rats was observed respectively, and the expression/distribution of HSP72 in retina was assessed by immunohistochemical detection...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28806748/temperature-effects-on-gene-expression-and-morphological-development-of-european-eel-anguilla-anguilla-larvae
#7
Sebastian N Politis, David Mazurais, Arianna Servili, Jose-Luis Zambonino-Infante, Joanna J Miest, Sune R Sørensen, Jonna Tomkiewicz, Ian A E Butts
Temperature is important for optimization of rearing conditions in aquaculture, especially during the critical early life history stages of fish. Here, we experimentally investigated the impact of temperature (16, 18, 20, 22 and 24°C) on thermally induced phenotypic variability, from larval hatch to first-feeding, and the linked expression of targeted genes [heat shock proteins (hsp), growth hormone (gh) and insulin-like growth factors (igf)] associated to larval performance of European eel, Anguilla anguilla...
2017: PloS One
https://www.readbyqxmd.com/read/28805107/effects-of-high-frequency-repetitive-transcranial-magnetic-stimulation-on-reducing-hemiplegic-shoulder-pain-in-patients-with-chronic-stoke-a-randomized-controlled-trial
#8
Gyu-Sik Choi, Min Cheol Chang
OBJECTIVE: To examine whether high-frequency (10 Hz) repetitive transcranial magnetic stimulation (rTMS), applied over the primary motor cortex of the affected hemisphere, could be used to manage hemiplegic shoulder pain (HSP). METHODS: Twenty-four chronic stroke patients with chronic HSP, randomly assigned into the rTMS group (10 sessions of high-frequency stimulation) or the sham group (sham stimulation), was performed. The Numeric Rating Scale (NRS) was used to evaluate the intensity of pain at pre-treatment, and at one day, and one, two, and four weeks after treatment...
August 12, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28801701/the-overexpression-of-hsp90b1-is-associated-with-tumorigenesis-of-canine-mammary-glands
#9
B V Sunil Kumar, Rabia Bhardwaj, Kanika Mahajan, Neeraj Kashyap, Ashwani Kumar, Ramneek Verma
Heat shock proteins (Hsp) are molecular chaperones that are responsible for protein folding and maintenance of cellular homeostasis. Hsp90, an important member of HSP family, has an important role in breast cancer. Glucose-regulated protein 94 (Grp94) is the endoplasmic reticulum paralog of Hsp90 encoded by Hsp90B1 gene. To test if this protein is overexpressed in dogs with mammary tumor, we estimated and compared its serum levels in healthy dogs and that of dogs with mammary tumors. Hsp90B1 mRNA expression was measured in tumorous and healthy mammary tissues (from age- and breed-matched dogs) by real-time PCR...
August 12, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28796386/heat-shock-protein-70-from-a-thermotolerant-diptera-species-provides-higher-thermoresistance-to-drosophila-larvae-than-correspondent-endogenous-gene
#10
V Y Shilova, O G Zatsepina, D G Garbuz, S Y Funikov, E S Zelentsova, N G Schostak, A M Kulikov, M B Evgen'ev
Heat shock proteins (Hsp70s) from two Diptera species that drastically differ in their heat shock response and longevity were investigated. Drosophila melanogaster is characterized by the absence of Hsp70 and other hsps under normal conditions and the dramatic induction of hsp synthesis after temperature elevation. The other Diptera species examined belongs to the Stratiomyidae family (Stratiomys singularior) and exhibits high levels of inducible Hsp70 under normal conditions coupled with a thermotolerant phenotype and much longer lifespan...
August 10, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28795330/acetylcholinesterase-and-heat-shock-protein-70-response-in-larval-brain-tissue-of-lymantria-dispar-l-lepidoptera-limantriidae-upon-chronic-exposure-to-benzo-a-pyrene
#11
Larisa Ilijin, Marija Mrdaković, Milena Vlahović, Dragana Matić, Anja Gavrilović, Aleksandra Mrkonja, Vesna Perić-Mataruga
The effects of different concentrations of benzo(a)pyrene (BaP) (2, 10, 20, 100, 200, and 2000 ng/g dry food weight) on the activity of acetylcholinesterase (AChE) and concentration of heat-shock protein 70 (hsp70) in fifth instar Lymantria dispar brain tissue were investigated. Inhibition of AChE is a general effect biomarker at the individual level. We observed the most efficient inhibition of this enzyme at medium and high BaP concentrations (20, 100, 200, and 2000 ng/g dry food weight). Western blot analysis revealed the presence of two hsp 70 isoforms, with changed amounts depending on the BaP concentration...
August 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28794932/screening-of-neem-extracts-for-microbial-anti-chaperone-activity-by-employing-in-vitro-enzyme-refolding-assay
#12
Jyoti M Patki, Priyanka Shah
Microbial heat shock proteins (Hsps) play an important role in pathogenesis and development of resistance to existing drugs. New compounds that target microbial molecular chaperones have the potential of combating the challenge of anti-microbial resistance. The present study was aimed at assessing the employment of in vitro enzyme refolding assay to detect anti-chaperone activity of Neem (Azadirachta indica) extracts. Protein extracts of thermotolerant Escherichia coli cells were used as a source of Hsps or chaperones...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28783551/extracellular-hsp72-induces-proinflammatory-cytokines-in-human-periodontal-ligament-fibroblast-cells-through-the-tlr4-nf%C3%AE%C2%BAb-pathway-in-vitro
#13
Chihiro Arai, Yoshiaki Nomura, Masazumi Matsuzawa, Nobuhiro Hanada, Yoshiki Nakamura
OBJECTIVE: The aim of the present study was to examine the effect of extracellular heat shock protein (HSP) 72 on human periodontal ligament fibroblast cells (hPDLFs) in vitro. DESIGN: hPDLFs were stimulated by recombinant human HSP72 (rhHSP72). TAK-242 was used to inhibit toll-like receptor 4 (TLR4) activity. Interleukin (IL)-6, IL-8 and tumor necrosis factor (TNF)-α mRNA levels were analyzed by real-time PCR and protein levels were analyzed by enzyme-linked immunosorbent assay...
July 30, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28776223/differential-expression-of-micrornas-associated-with-thermal-stress-in-frieswal-bos-taurus-x-bos-indicus-crossbred-dairy-cattle
#14
Gyanendra Singh Sengar, Rajib Deb, Umesh Singh, T V Raja, Rajiv Kant, Basavraj Sajjanar, Rani Alex, R R Alyethodi, Ashish Kumar, Sushil Kumar, Rani Singh, Subhash J Jakhesara, C G Joshi
Environmental temperature is one of the important abiotic factors that influence the normal physiological function and productive performance of dairy cattle. Temperature stress evokes complex responses that are essential for safeguarding of cellular integrity and animal health. Post-transcriptional regulation of gene expression by miRNA plays a key role cellular stress responses. The present study investigated the differential expression of miRNA in Frieswal (Holstein Friesian × Sahiwal) crossbred dairy cattle that are distinctly adapted to environmental temperature stress as they were evolved by using the temperate dairy breed Holstein Friesian...
August 3, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28774183/annals-express-altered-mean-platelet-volume-in-children-with-henoch-schonlein-purpura-and-its-association-with-disease-activity
#15
Xiang Shi, Wen Chao Li, Li Jun Mo, Xiao Hong Li, Yu Zhen Luo, Liu Qun Qin, Zheng Yang, Wu Ning Mo
BACKGROUND: Henoch-Schonlein purpura (HSP) is a systemic small-vessel vasculitis that occurs mainly in children. A review of the literature has suggested a correlation between mean platelet volume (MPV) and several inflammatory disorders. However, to the best of our knowledge, any potential correlation between MPV and HSP has not been reported in the literature. Therefore, our study aimed to evaluate the role of MPV levels in patients with HSP. METHODS: This study included 97 children with HSP and 120 healthy individuals as controls...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28771523/differential-expression-of-pathogenic-genes-of-entamoeba-histolytica-vs-e-dispar-in-a-model-of-infection-using-human-liver-tissue-explants
#16
Cecilia Ximénez, Enrique González, Miriam Nieves, Ulises Magaña, Patricia Morán, Marco Gudiño-Zayas, Oswaldo Partida, Eric Hernández, Liliana Rojas-Velázquez, Ma Carmen García de León, Héctor Maldonado
We sought to establish an ex vivo model for examining the interaction of E. histolytica with human tissue, using precision-cut liver slices (PCLS) from donated organs. E. histolytica- or E. dispar-infected PCLS were analyzed at different post-infection times (0, 1, 3, 24 and 48 h) to evaluate the relation between tissue damage and the expression of genes associated with three factors: a) parasite survival (peroxiredoxin, superoxide dismutase and 70 kDa heat shock protein), b) parasite virulence (EhGal/GalNAc lectin, amoebapore, cysteine proteases and calreticulin), and c) the host inflammatory response (various cytokines)...
2017: PloS One
https://www.readbyqxmd.com/read/28769037/mechanism-of-biofilm-mediated-stress-resistance-and-lifespan-extension-in-c-elegans
#17
Olga Smolentseva, Ivan Gusarov, Laurent Gautier, Ilya Shamovsky, Alicia S DeFrancesco, Richard Losick, Evgeny Nudler
Bacteria naturally form communities of cells known as biofilms. However the physiological roles of biofilms produced by non-pathogenic microbiota remain largely unknown. To assess the impact of a biofilm on host physiology we explored the effect of several non-pathogenic biofilm-forming bacteria on Caenorhabditis elegans. We show that biofilm formation by Bacillus subtilis, Lactobacillus rhamnosus and Pseudomonas fluorescens induces C. elegans stress resistance. Biofilm also protects against pathogenic infection and prolongs lifespan...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28767653/in-silico-analysis-to-identify-vaccine-candidates-common-to-multiple-serotypes-of-shigella-and-evaluation-of-their-immunogenicity
#18
Sapna Pahil, Neelam Taneja, Hifzur Rahman Ansari, G P S Raghava
Shigellosis or bacillary dysentery is an important cause of diarrhea, with the majority of the cases occurring in developing countries. Considering the high disease burden, increasing antibiotic resistance, serotype-specific immunity and the post-infectious sequelae associated with shigellosis, there is a pressing need of an effective vaccine against multiple serotypes of the pathogen. In the present study, we used bio-informatics approach to identify antigens shared among multiple serotypes of Shigella spp...
2017: PloS One
https://www.readbyqxmd.com/read/28761605/henoch-schonlein-purpura-associated-with-primary-active-epstein-barr-virus-infection-a-case-report
#19
Burcu Karakayali, Sila Yilmaz, Deniz Çakir, Pembe Gül Günes, Sirin Güven, Ismail Islek
Henoch-Schönlein purpura (HSP) is the most common form of childhood vasculitis. Various viral and bacterial infections, drugs, vaccines, food allergy and even insect bites have been considered as triggering factors in pathogenesis of HSP. Epstein-Barr virus (EBV) infection, which is associated with HSP, have been rarely reported. Herein we present HSP patient possibly caused by EBV infection. A 8-year old boy was admitted to our department with fever, rashes on legs and arms and intermittent mild abdominal pain...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28753244/functional-characterization-of-the-transcriptional-regulatory-elements-of-three-highly-expressed-constitutive-genes-in-the-jewel-wasp-nasonia-vitripennis
#20
P D Shirk, R B Furlong, A Dolan, J H Werren
The jewel wasp, Nasonia vitripennis Ashmead (Hymenoptera: Pteromalidae), is an easily reared parasitoid that is providing an ever increasingly malleable model for examining the biology and genetics of Hymenoptera. Utilizing genomic and transcriptome resources, 5' upstream transcriptional regulatory sequences (TREs) from three highly expressed genes were identified and cloned. Criteria for TRE selection included the presence of an adjacent gene 5' of the translation initiation site. One gene was methylated whereas the other two were nonmethylated...
July 28, 2017: Insect Molecular Biology
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