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https://www.readbyqxmd.com/read/28640802/peroxisomal-biogenesis-is-genetically-and-biochemically-linked-to-carbohydrate-metabolism-in-drosophila-and-mouse
#1
Michael F Wangler, Yu-Hsin Chao, Vafa Bayat, Nikolaos Giagtzoglou, Abhijit Babaji Shinde, Nagireddy Putluri, Cristian Coarfa, Taraka Donti, Brett H Graham, Joseph E Faust, James A McNew, Ann Moser, Marco Sardiello, Myriam Baes, Hugo J Bellen
Peroxisome biogenesis disorders (PBD) are a group of multi-system human diseases due to mutations in the PEX genes that are responsible for peroxisome assembly and function. These disorders lead to global defects in peroxisomal function and result in severe brain, liver, bone and kidney disease. In order to study their pathogenesis we undertook a systematic genetic and biochemical study of Drosophila pex16 and pex2 mutants. These mutants are short-lived with defects in locomotion and activity. Moreover these mutants exhibit severe morphologic and functional peroxisomal defects...
June 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28637135/cross-cultural-validity-of-the-abiloco-questionnaire-for-individuals-with-stroke-based-on-rasch-analysis
#2
Patrick Roberto Avelino, Lívia Castro Magalhães, Iza Faria-Fortini, Marluce Lopes Basílio, Kênia Kiefer Parreiras Menezes, Luci Fuscaldi Teixeira-Salmela
PURPOSE: The purpose of this study was to evaluate the cross-cultural validity of the Brazilian version of the ABILOCO questionnaire for stroke subjects. MATERIALS AND METHODS: Cross-cultural adaptation of the original English version of the ABILOCO to the Brazilian-Portuguese language followed standardized procedures. The adapted version was administered to 136 stroke subjects and its measurement properties were assessed using Rash analysis. Cross-cultural validity was based on cultural invariance analyses...
February 10, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28636923/mechanosensitive-adhesion-explains-stepping-motility-in-amoeboid-cells
#3
Calina A Copos, Sam Walcott, Juan C Del Álamo, Effie Bastounis, Alex Mogilner, Robert D Guy
Cells employing amoeboid motility exhibit repetitive cycles of rapid expansion and contraction and apply coordinated traction forces to their environment. Although aspects of this process are well studied, it is unclear how the cell controls the coordination of cell length changes with adhesion to the surface. Here, we develop a simple model to mechanistically explain the emergence of periodic changes in length and spatiotemporal dynamics of traction forces measured in chemotaxing unicellular amoeba, Dictyostelium discoideum...
June 20, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28635959/optogenetic-activation-of-plexin-b1-reveals-contact-repulsion-between-osteoclasts-and-osteoblasts
#4
Abhijit Deb Roy, Taofei Yin, Shilpa Choudhary, Vladimir Rodionov, Carol C Pilbeam, Yi I Wu
During bone remodelling, osteoclasts induce chemotaxis of osteoblasts and yet maintain spatial segregation. We show that osteoclasts express the repulsive guidance factor Semaphorin 4D and induce contact inhibition of locomotion (CIL) in osteoblasts through its receptor Plexin-B1. To examine causality and elucidate how localized Plexin-B1 stimulation may spatiotemporally coordinate its downstream targets in guiding cell migration, we develop an optogenetic tool for Plexin-B1 designated optoPlexin. Precise optoPlexin activation at the leading edge of migrating osteoblasts readily induces local retraction and, unexpectedly, distal protrusions to steer cells away...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28633472/association-between-subjective-sleep-quality-and-future-risk-of-falls-in-older-people-results-from-lohas
#5
Shiho Takada, Yosuke Yamamoto, Sayaka Shimizu, Miho Kimachi, Tatsuyoshi Ikenoue, Shingo Fukuma, Yoshihiro Onishi, Misa Takegami, Shin Yamazaki, Rei Ono, Miho Sekiguchi, Koji Otani, Shin-Ichi Kikuchi, Shin-Ichi Konno, Shunichi Fukuhara
Background: Inadequate sleep is correlated with morbidity and mortality among older adults. However, the longitudinal relationship between subjective sleep quality and risk of falls in the elderly remains to be clarified. Methods: Study participants were from Locomotive Syndrome and Health Outcome in Aizu Cohort Study (LOHAS) sites (1071 community-dwelling people ≧65 years of age, mean, 71 years). Subjective sleep quality was measured by the Pittsburgh Sleep Quality Index (PSQI)...
June 17, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28633035/economy-and-endurance-in-human-evolution
#6
REVIEW
Herman Pontzer
The evolutionary pressures shaping humans' unique bipedal locomotion have been a focus of research since Darwin, but the origins of humans' economical walking gait and endurance running capabilities remain unclear. Here, I review the anatomical and physiological determinants of locomotor economy (e.g., limb length and posture) and endurance (e.g., muscle volume and fiber type) and investigate their development in the hominin fossil record. The earliest hominins were bipedal but retained ape-like features in the hind limb that would have limited their walking economy compared to living humans...
June 19, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28632275/architectures-of-soft-robotic-locomotion-enabled-by-simple-mechanical-principles
#7
Liangliang Zhu, Yunteng Cao, Yilun Liu, Zhe Yang, Xi Chen
In nature, a variety of limbless locomotion patterns flourish, from the small or basic life forms (Escherichia coli, amoebae, etc.) to the large or intelligent creatures (e.g., slugs, starfishes, earthworms, octopuses, jellyfishes, and snakes). Many bioinspired soft robots based on locomotion have been developed in the past few decades. In this work, based on the kinematics and dynamics of two representative locomotion modes (i.e., worm-like crawling and snake-like slithering), we propose a broad set of innovative designs for soft mobile robots through simple mechanical principles...
June 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28632102/effect-of-transient-perturbations-of-short-term-memory-on-target-directed-blind-locomotion
#8
Sarah Piekarski, Yves Lajoie, Nicole Paquet
It is difficult to walk without vision to a nearby destination if there is a time delay between watching the destination and walking toward it. Indeed, path deviation occurred when delays were introduced before initiating straight ahead blindfolded walking (R. A. Tyrrell, K. K., Rudolph, B. G., Eggers, & H. W. Leibowitz, 1993 ). The questions are whether the location of a 60-s delay in the walking path and whether performing a cognitive task during the delay influence the accuracy in reaching a previously seen target while walking without vision...
March 2, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28631995/monitoring-the-effect-of-pathogenic-nematodes-on-locomotion-of-drosophila-larvae
#9
Martin Kunc, Badrul Arefin, Pavel Hyrsl, Ulrich Theopold
One of the key factors that determine the interaction between hosts and their parasites is the frequency of their interactions, which depends on the locomotory behavior of both parts. To address host behavior we used natural infections involving insect pathogenic nematodes and Drosophila melanogaster larvae as hosts. Using a modified version of a recently described method (FIMTrack) to assess several parameters in larger sets of animals, we initially detected specific differences in larval food searching when comparing Drosophila strains...
February 21, 2017: Fly
https://www.readbyqxmd.com/read/28631840/the-effect-of-infant-vocalization-in-alloparental-responsiveness-of-common-marmosets-callithrix-jacchus
#10
Maricele Nascimento Barbosa, Maria Teresa da Silva Mota, Marcela Nascimento Barbosa
Among mammals, alloparental care can be influenced by hormones as well as by previous experience and sensory stimuli from the infants, such as sight and sound, smell, and physical contact with the infant. To determine the responsiveness of common marmoset (Callithrix jacchus) nonreproductive females and males with and without previous experience in caretaking to infant sensory cues, we exposed 12 females and 12 males to vocalization recordings for 10 min under two conditions: (1) exposure to adult conspecific vocalization recordings, and (2) exposure to infant vocalization recordings...
June 20, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#11
Christine Chevallereau, Frédéric Boyer, Mathieu Porez, Johan Mauny, Yannick Aoustin
To a large extent, robotics locomotion can be viewed as cyclic motions, named gaits. Due to the high complexity of the locomotion dynamics, to find the control laws that ensure an expected gait and its stability with respect to external perturbations, is a challenging issue for feedback control. To address this issue, a promising way is to take inspiration from animals that intensively exploit the interactions of the passive degrees of freedom of their body with their physical surroundings, to outsource the high-level exteroceptive feedback control to low-level proprioceptive ones...
June 20, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28630618/perinatal-effects-of-scorpion-venoms-maternal-and-offspring-development
#12
REVIEW
Ana Leticia Coronado Dorce, Adriana do Nascimento Martins, Valquiria Abrão Coronado Dorce, Ana Leonor Abrahão Nencioni
Scorpion envenomation is a public health problem, especially in tropical and subtropical countries. Considering the high incidence of scorpionism in some areas, pregnant women and nursing mothers may be possible victims. Scorpion stings alter the release of neurotransmitters and some cytokines. These mediators act as organizers and programmers in the adequate formation of the nerves, and non-physiological concentrations of them during the brain organization originate disorders and diseases that can appear later in the life of the individual...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28628395/evaluation-of-a-companion-robot-based-on-field-tests-with-single-older-adults-in-their-homes
#13
Katalin Zsiga, András Tóth, Tamás Pilissy, Orsolya Péter, Zoltán Dénes, Gábor Fazekas
The growing number of older adults places insurmountable load on family members and professional caregivers. Assistive technology with the aid of robots can present a possible solution. The goal of this article was to test a companion robot supporting older adults in their home environments. Eight senior volunteers were involved in the field test. They all lived alone and were self-supporting. The robot was capable of providing cognitive assistance to manage the user's daily routine. Each participant used the robot for 94...
June 19, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28626932/dentate-gyrus-neurogenesis-ablation-via-cranial-irradiation-enhances-morphine-self-administration-and-locomotor-sensitization
#14
Sarah E Bulin, Matthew L Mendoza, Devon R Richardson, Kwang H Song, Timothy D Solberg, Sanghee Yun, Amelia J Eisch
Adult dentate gyrus (DG) neurogenesis is important for hippocampal-dependent learning and memory, but the role of new neurons in addiction-relevant learning and memory is unclear. To test the hypothesis that neurogenesis is involved in the vulnerability to morphine addiction, we ablated adult DG neurogenesis and examined morphine self-administration (MSA) and locomotor sensitization. Male Sprague-Dawley rats underwent hippocampal-focused, image-guided X-ray irradiation (IRR) to eliminate new DG neurons or sham treatment (Sham)...
June 19, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28626786/interaction-between-estradiol-and-5-ht1a-receptors-in-the-median-raphe-nucleus-on-acquisition-of-aversive-information-and-association-to-the-context-in-ovariectomized-rats
#15
Telma Gonçalves Carneiro Spera de Andrade, João Victor Dos Santos Silva, Matheus Fitipaldi Batistela, Fernando Frei, Ana Beatriz Sant'Ana
The median raphe nucleus (MRN) is related to stress resistance and defensive responses, a crucial source of serotonergic neurons that project to prosencephalic structures related to stress and anxiety. Estrogen receptors were identified in this mesencephalic structure. It is possible that the estrogen action is related to serotonin effect on somatodendritic 5-HT1A receptors, inhibiting the function of serotonergic neurons and thus preventing of the stress effect and inducing anxiolysis. So, in order to evaluate these aspects, female Wistar rats were ovariectomized and 21 days later were given a direct microinjection of estradiol benzoate (EB) (1200 ng) into the MRN, preceded by microinjections of saline or WAY100...
December 2017: Neurobiology of Stress
https://www.readbyqxmd.com/read/28624774/sex-and-genetic-background-influence-superoxide-dismutase-csod-related-phenotypic-variation-in-drosophila-melanogaster
#16
Courtney E Lessel, Tony L Parkes, Joel Dickinson, Thomas J S Merritt
Mutations often have drastically different effects in different genetic backgrounds; understanding a gene's biological function then requires an understanding of its interaction with genetic diversity. The antioxidant enzyme cytosolic superoxide dismutase, cSOD, catalyzes the dismutation of the superoxide radical, a molecule that can induce oxidative stress if its concentration exceeds cellular control. Accordingly, Drosophila melanogaster lacking functional cSOD exhibit a suite of phenotypes including decreased longevity, hypersensitivity to oxidative stress, impaired locomotion, and reduced NADP(H) enzyme activity in males...
June 17, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28624702/evaluation-of-the-antidepressant-therapeutic-potential-of-isocyanine-and-pseudoisocyanine-analogues-of-the-organic-cation-decynium-22
#17
Anwen M Krause-Heuer, Rheaclare Fraser-Spears, Jeremy C Dobrowolski, Mark E Ashford, Naomi A Wyatt, Maxine P Roberts, Georgianna G Gould, Wai-Ching Cheah, Clarissa K L Ng, Mohan Bhadbhade, Bo Zhang, Ivan Greguric, Nial J Wheate, Naresh Kumar, Wouter Koek, Paul D Callaghan, Lynette C Daws, Benjamin H Fraser
Herein we describe the synthesis and evaluation of antidepressant properties of seven analogues (1-7) of the low affinity/high capacity transporter blocker decynium-22 (D-22). All analogues (1-7) were synthesized via base promoted coupling reactions between N-alkylated-2-methylquinolinium iodides or N-alkylated-4-methylquinolinium iodides and electrophilic N-alkylated-2-iodoquinolinium iodides. All final compounds were purified by re-crystallization or preparative HPLC and initial evaluation studies included; 1) screening for in vitro α1-adrenoceptor activity (a property that can lead to unwanted side-effects), 2) measuring antidepressant-like activity in a mouse tail suspension test (TST), and 3) measuring effects upon mouse locomotion...
June 7, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28624288/short-communication-behavioral-evaluation-of-the-analgesic-effect-of-flunixin-meglumine-in-lame-dairy-cows
#18
S A Wagner, J M Young, J K Tena, B H Manning
The objective of this study was to evaluate the effect of flunixin meglumine treatment on lameness pain in dairy cows. Twenty-four lactating Holstein cows were enrolled in the study based on visual observation of abnormal locomotion. The primary measurement endpoint was weight-shifting between the rear limbs. Weight-shifting was calculated as the standard deviation of the weight borne on the rear limbs over a 15 min period; this value correlates directly with lameness pain in dairy cows. After collecting baseline weight-bearing data, we randomly assigned cows to 1 of 2 treatment groups: 2...
June 14, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28623664/mechanosensory-neurons-control-the-timing-of-spinal-microcircuit-selection-during-locomotion
#19
Claire Wyart, Steven Knafo, Kevin Fidelin, Andrew Prendergast, Po-En Brian Tseng, Alexandre Parrin, Charles William Dickey, Urs Lucas Böhm, Sophie Nunes FIgueiredo, Olivier Thouvenin, Hugues Pascal-Moussellard
Despite numerous physiological studies about reflexes in the spinal cord, the contribution of mechanosensory feedback to active locomotion and the nature of underlying spinal circuits remains elusive. Here we investigate how mechanosensory feedback shapes active locomotion in a genetic model organism exhibiting simple locomotion-the zebrafish larva. We show that mechanosensory feedback enhances the recruitment of motor pools during active locomotion. Furthermore, we demonstrate that inputs from mechanosensory neurons increase locomotor speed by prolonging fast swimming at the expense of slow swimming during stereotyped acoustic escape responses...
June 17, 2017: ELife
https://www.readbyqxmd.com/read/28623168/access-to-nicotine-in-drinking-water-reduces-weight-gain-without-changing-caloric-intake-on-high-fat-diet-in-male-c57bl-6j-mice
#20
Cali A Calarco, Somin Lee, Marina R Picciotto
Nicotine and tobacco use is associated with lower body weight, and many smokers report concerns about weight. In animal studies, nicotine reduces weight gain, reduces food consumption, and alters energy expenditure, but these effects vary with duration and route of nicotine administration. Previous studies have used standardized nicotine doses, however, in this study, male and female mice had free access to nicotine drinking water for 30 days while fed either a high fat diet (HFD) or chow, allowing animals to titrate their nicotine intake...
June 13, 2017: Neuropharmacology
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