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https://www.readbyqxmd.com/read/29055270/executive-functioning-concern-about-falling-and-quadriceps-strength-mediate-the-relationship-between-impaired-gait-adaptability-and-fall-risk-in-older-people
#1
Maria Joana D Caetano, Stephen R Lord, Matthew A Brodie, Daniel Schoene, Paulo H S Pelicioni, Daina L Sturnieks, Jasmine C Menant
BACKGROUND: Reduced ability to adapt gait, particularly under challenging conditions, may be an important reason why older adults have an increased risk of falling. This study aimed to identify cognitive, psychological and physical mediators of the relationship between impaired gait adaptability and fall risk in older adults. METHODS: Fifty healthy older adults (mean±SD: 74±7years) were categorised as high or low fall risk, based on past falls and their performance in the Physiological Profile Assessment...
October 16, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29055268/early-age-of-e-cigarette-use-onset-mediates-the-association-between-impulsivity-and-e-cigarette-use-frequency-in-youth
#2
Krysten W Bold, Meghan E Morean, Grace Kong, Patricia Simon, Deepa R Camenga, Dana A Cavallo, Suchitra Krishnan-Sarin
BACKGROUND: Identifying risk factors for youth e-cigarette use is critical, given high rates of e-cigarette use and unknown health effects of long-term use. The current study examined whether an early age of onset of e-cigarette use mediates the association between impulsivity and e-cigarette frequency. METHODS: Cross-sectional survey data of e-cigarette users (n=927) were collected from 8 high schools in southeastern Connecticut. The sample was 44.7% female (mean age 16...
October 13, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29055240/automatic-processing-of-emotional-facial-expressions-as-a-function-of-social-anhedonia
#3
Vivien Günther, Juliane Zimmer, Anette Kersting, Karl-Titus Hoffmann, Donald Lobsien, Thomas Suslow
Anhedonia is an important feature of major depression and schizophrenia-spectrum disorders. Few neuroimaging studies have investigated neural alterations in high anhedonia, isolated from other psychopathological variables, by including only participants without clinical diagnoses. The present study examined healthy individuals scoring high (N = 18) vs. low (N = 19) in social anhedonia, who were carefully selected from a sample of N = 282 participants. To examine differences in automatic brain responses to social-affective stimuli between high vs...
October 10, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29055237/mechanisms-of-action-during-a-dissonance-based-intervention-through-14-month-follow-up-the-roles-of-body-shame-and-body-surveillance
#4
Lisa S Kilpela, Katherine E Schaumberg, Lindsey B Hopkins, Carolyn B Becker
Objectification theory posits that internalization of societal perspectives about the female body leads to increased body surveillance, which can result in body-related shame and subsequent eating disorder (ED) behaviors. Preliminary research indicates that these associations may be complex in nature. This study examined temporal relations among body surveillance, body shame, and eating disorder symptoms in the context of a dissonance-based body image intervention and through 14-month follow-up. College women (N=285) completed assessments at baseline, post-intervention, and at 8-week, 8-month, and 14-month follow-up...
October 18, 2017: Body Image
https://www.readbyqxmd.com/read/29055211/bio-affinity-mediated-immobilization-of-lipase-onto-magnetic-cellulose-nanospheres-for-high-yield-biodiesel-in-one-time-addition-of-methanol
#5
Ramesh Bandikari, Jiaxin Qian, Ram Baskaran, Ziduo Liu, Gaobing Wu
To synthesis biodiesel from palm oil in one-time addition of methanol and solvent-free medium using CBD fused with C-terminal of lipase from G. stearothermophilus (GSlip-CBD) was immobilized onto magnetic cellulose nanosphere (MCNS). The immobilized matrix traits were preconceived by FT-IR, TEM and XRD. Perceptible biodiesel yield 98 and 73% was synthesized by GSlip-CBD-MCNS in 4 h and GSlip-MCNS in 6 h under the optimized conditions of oil:methanol ratio (1:3.5), temperature (55 and 50 °C) and enzyme loading (15 U)...
October 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29055202/tio2-nanoparticles-in-seawater-aggregation-and-interactions-with-the-green-alga-dunaliella-tertiolecta
#6
Elisabetta Morelli, Edi Gabellieri, Alessandra Bonomini, Danika Tognotti, Giacomo Grassi, Ilaria Corsi
Titanium dioxide nanoparticles (TiO2 NPs) have been widely employed in industrial applications, thus rising concern about their impact in the aquatic environment. In this study we investigated the chemical behaviour of TiO2 NPs in the culture medium and its effect on the green alga Dunaliella tertiolecta, in terms of growth inhibition, oxidative stress, ROS (Reactive Oxygen Species) accumulation and chlorophyll content. In addition, the influence of exopolymeric substances (EPS) excreted by the microalgae on the stability of NPs has been evaluated...
October 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29055189/a-mannose-specific-c-type-lectin-from-fenneropenaeus-merguiensis-exhibited-antimicrobial-activity-to-mediate-shrimp-innate-immunity
#7
Phanthipha Runsaeng, Peerapong Puengyam, Prapaporn Utarabhand
Being one type of pattern recognition receptors (PRRs), lectins exhibit a crucial role in the defense mechanism of invertebrates which are deficient in an adaptive immune system. A new C-type lectin called FmLC3 was isolated from hepatopancreas of Fenneropenaeus merguiensis by cloning approaches, RT-PCR and 5' and 3' RACE (rapid amplification of cDNA ends). A full-length cDNA of FmLC3 contains 607 bp with one open reading frame of 480bp, encoding a 159-amino acids peptide. The predicted primary structure of FmLC3 is composed of a signal peptide, a carbohydrate recognition domain with an EPN motif and one Ca(2+) binding site-2, including a double-loop region assisted by two conserved disulfide linkages...
October 18, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29055187/an-effective-hiv-1-integrase-inhibitor-screening-platform-rationality-validation-of-drug-screening-conformational-mobility-and-molecular-recognition-analysis-for-pfv-integrase-complex-with-viral-dna
#8
Wenyi Du, Ke Zuo, Xin Sun, Wei Liu, Xiao Yan, Li Liang, Hua Wan, Fengzheng Chen, Jianping Hu
As an important target for the development of novel anti-AIDS drugs, HIV-1 integrase (IN) has been widely concerned. However, the lack of a complete accurate crystal structure of HIV-1 IN greatly blocks the discovery of novel inhibitors. In this work, an effective HIV-1 IN inhibitor screening platform, namely PFV IN, was filtered from all species of INs. Next, the 40.8% similarity with HIV-1 IN, as well as the high efficiency of virtual screening and the good agreement between calculated binding free energies and experimental ones all proved PFV IN is a promising screening platform for HIV-1 IN inhibitors...
October 5, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/29055180/artificial-photosynthetic-systems-for-co2-reduction-progress-on-higher-efficiency-with-cobalt-complexes-as-catalysts
#9
Feng Wang
The conversion of CO2 to fuels or value-added chemicals is currently a field of great research interest. Molecular cobalt catalysts had long been used as mediators of CO2 reduction transformation. In this mini-review, the cobalt complex-based photocatalytic and photoelectrocatalytic systems towards CO2 reduction are reviewed. Progress on the design of new molecular cobalt catalysts and their performance in photocatalysis is discussed and summarized.
October 21, 2017: ChemSusChem
https://www.readbyqxmd.com/read/29055154/gene-expression-changes-in-male-accessory-glands-during-ageing-are-accompanied-by-reproductive-decline-in-drosophila-melanogaster
#10
Mareike Koppik, Claudia Fricke
Senescence is accompanied by loss of reproductive functions. Here we studied reproductive ageing in Drosophila melanogaster males and asked whether the expected decline in male reproductive success is due to diminished functionality of the male accessory gland. The male accessory gland produces the majority of seminal fluid proteins (SFPs) transferred to the female at mating. SFPs induce female post-mating changes and are key to male reproductive success. We measured age-dependent gene expression changes for five representative SFP genes in males from four different age groups ranging from one to six weeks after eclosion...
October 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29055101/substance-p-and-dopamine-interact-to-modulate-the-distribution-of-delta-opioid-receptors-on-cholinergic-interneurons-in-the-striatum
#11
Emily Heath, Billy Chieng, Macdonald J Christie, Bernard W Balleine
It recently been demonstrated that predictive learning induces a persistent accumulation of delta-opioid receptors (DOPr's) at the somatic membrane of cholinergic interneurons (CINs) in the nucleus accumbens shell (Nac-S). This accumulation is required for predictive learning to influence subsequent choice between goal-directed actions. The current experiments investigated the local neurochemical events responsible for this translocation. We found that (1) local administration of substance P into multiple striatal sub-territories induced DOPr translocation and (2) that this effect was mediated by the NK1 receptor, likely through its expression on CINs...
October 20, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29055099/regulation-of-glycosaminoglycan-biogenesis-is-critical-for-sensitive-period-dependent-vocal-ontogeny
#12
Caitlin P Mencio, Vy My Tran, Maritza V Quintero, Mamoru Koketsu, Franz Goller, Balagurunathan Kuberan
In the brain, the extracellular matrix (ECM) plays a central role during neural development and thus modulates critical-period regulated behavioral ontogeny. The major components of the ECM are glycosaminoglycans (GAGs) including chondroitin sulfate (CS). However, the specific roles of GAGs in behavioral development are largely unknown. It has been shown that xylosides affect the biological functions of GAGs through modulating GAG biosynthesis. Particularly, xylosides affect GAG biosynthesis through priming of GAG chains (priming activity), competing with endogenous core proteins that carry GAG initiation sites (decoy activity), or both...
October 21, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/29055091/functional-interaction-of-junctophilin-2-with-small-conductance-ca-2-activated-potassium-channel-subtype-2-sk2-in-mouse-cardiac-myocytes
#13
Hong K Fan, Tian X Luo, Wei D Zhao, Yong H Mu, Yang Yang, Wen J Guo, Hui Y Tu, Qian Zhang
AIM: Junctophilins (JPs), a protein family of the junctional membrane complex, maintain the close conjunction between cell surface and intracellular membranes in striate muscle cells mediating the cross talk between extracellular Ca(2+) entry and intracellular Ca(2+) release. The small conductance Ca(2+) -activated K(+) channels are activated by the intracellular calcium and play an essential role in the cardiac action potential profile. Molecular mechanisms of regulation of the SK channels are still uncertain...
October 21, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29055076/molecular-dissection-of-protein-protein-interactions-between-integrin-%C3%AE-5%C3%AE-1-and-the-helicobacter-pylori-cag-type-iv-secretion-system
#14
Thomas Koelblen, Célia Bergé, Mickaël V Cherrier, Karl Brillet, Luisa Jimenez-Soto, Lionel Ballut, Junichi Takagi, Roland Montserret, Patricia Rousselle, Wolfgang Fischer, Rainer Haas, Rémi Fronzes, Laurent Terradot
The more severe strains of the bacterial human pathogen Helicobacter pylori produce a type IV secretion system (cagT4SS) to inject the oncoprotein CagA into gastric cells. This syringe-like molecular apparatus is prolonged by an external pilus that exploits integrins as receptors to mediate the injection of CagA. The molecular determinants of the interaction of the cagT4SS pilus with the integrin ectodomain are still poorly understood. In this study, we have used surface plasmon resonance (SPR) to generate a comprehensive analysis of the protein-protein interactions between purified CagA, CagL, CagI, CagY repeat domain II (CagY(RRII) ), CagY C-terminal domain (CagY(B)(10) ) and integrin α5β1 ecto- (α5β1(E) ) or headpiece-domain (α5β1(HP) )...
October 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29055057/sperm-competition-but-not-major-histocompatibility-divergence-drive-differential-fertilization-success-between-alternative-reproductive-tactics-in-chinook-salmon
#15
S J Lehnert, L Helou, T E Pitcher, J W Heath, D D Heath
Post-copulatory sexual selection processes, including sperm competition and cryptic female choice (CFC), can operate based on major histocompatibility (MH) genes. We investigated sperm competition between male alternative reproductive tactics (jack (sneaker) and hooknose (guard)) of Chinook salmon (Oncorhynchus tshawytscha). Using a full factorial design, we examined in vitro competitive fertilization success of paired jack and hooknose males at three time points after sperm activation (0, 15 and 60 seconds) to test for male competition, CFC and time effects on male fertilization success...
October 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29055050/an-evolutionary-framework-outlining-the-integration-of-individual-social-and-spatial-ecology
#16
REVIEW
Quinn M R Webber, Eric Vander Wal
1.Behaviour is the interface between an organism and its environment, and behavioural plasticity is important for organisms to cope with environmental change. Social behaviour is particularly important because sociality is a dynamic process, where environmental variation influences group dynamics and social plasticity can mediate resource acquisition. Heterogeneity in the ecological environment can therefore influence the social environment. The combination of the ecological and social environments may be interpreted collectively as the 'socioecological' environment', which could explain variation in fitness...
October 21, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29055044/anti-glypican-1-antibody-drug-conjugate-exhibits-potent-preclinical-antitumor-activity-against-glypican-1-positive-uterine-cervical-cancer
#17
Satoko Matsuzaki, Satoshi Serada, Kosuke Hiramatsu, Satoshi Nojima, Shinya Matsuzaki, Yutaka Ueda, Tomoharu Ohkawara, Seiji Mabuchi, Minoru Fujimoto, Eiichi Morii, Kiyoshi Yoshino, Tadashi Kimura, Tetsuji Naka
Glypican-1 (GPC1) is highly expressed in solid tumors, especially squamous cell carcinomas (SCCs), and is thought to be associated with disease progression. We explored the use of a GPC1-targeted antibody-drug conjugate (ADC) as a novel treatment for uterine cervical cancer. On immunohistochemical staining, high expression levels of GPC1 were detected in about 50% of uterine cervical cancer tissues and also in a tumor that had relapsed after chemoradiotherapy. Novel anti-GPC1 monoclonal antibodies were developed, and clone 01a033 was selected as the best antibody for targeted delivery of the cytotoxic agent monomethyl auristatin F (MMAF) into GPC1-positive cells...
October 21, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29055041/the-possible-clinical-impact-of-risperidone-on-p-glycoprotein-mediated-transport-of-tacrolimus-a-case-report-and-in-vitro-study
#18
Nao Watanabe, Hiroki Higashi, Saki Nakamura, Keiko Nomura, Yuichi Adachi, Masato Taguchi
The authors encountered the case of an 8-fold increase in the concentration/dose (C/D) ratio of tacrolimus (TAC) following the coadministration of voriconazole (VRCZ) in a hematopoietic stem cell transplantation (HSCT) recipient. The interaction observed was much greater than expected and the patient had also been treated with oral risperidone (RSP). We hypothesized that cytochrome P450 (CYP)3A inhibition of the small intestine by VRCZ and P-glycoprotein (P-gp) inhibition of the small intestine by RSP exerted a synergistic effect on the bioavailability of TAC...
October 20, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/29055025/contribution-of-equilibrative-nucleoside-transporter-s-to-intestinal-basolateral-and-apical-transports-of-anticancer-trifluridine
#19
Koichi Takahashi, Kunihiro Yoshisue, Masato Chiba, Takeo Nakanishi, Ikumi Tamai
Trifluridine (FTD) exhibits anticancer activities after its oral administration despite its hydrophilic nature. We previously reported that concentrative nucleoside transporter (CNT) 1 mediates the apical uptake of FTD in human small intestinal epithelial cells (HIECs). In the present study, FTD was also identified as a substrate for equilibrative nucleoside transporter (ENT) 1 and ENT2 in transporter gene-transfected cells. An immunocytochemical analysis revealed that ENT1 was expressed at the basolateral and apical membranes of HIECs...
October 20, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/29055016/sgk1-is-a-critical-component-of-an-akt-independent-pathway-essential-for-pi3k-mediated-tumor-development-and-maintenance
#20
Arturo Orlacchio, Michela Ranieri, Martina Brave, Valeria Antico Arciuch, Toni Forde, Daniela De Martino, Karen E Anderson, Phillip Hawkins, Antonio Di Cristofano
Activation of the PI3K-AKT signaling cascade is a common critical event during malignant transformation. In this study, we used thyroid gland epithelial cells and a series of genetically engineered mouse strains as model systems to demonstrate that, while necessary, AKT activation is not sufficient for PI3K-driven transformation. Instead, transformation requires the activity of the PDK1-regulated AGC family of protein kinases. In particular, SGK1 was found to be essential for proliferation and survival of thyroid cancer cells harboring PI3K-activating mutations...
October 20, 2017: Cancer Research
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