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Negative reciprocity

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https://www.readbyqxmd.com/read/28109208/psychromonas-aquatilis-sp-nov-isolated-from-water-samples-obtained-in-the-chilean-antarctica
#1
Peter Kämpfer, Rute Irgang, Mathías Poblete-Morales, Stefanie P Glaeser, Marcelo Cortez-San Martín, Ruben Avendaño-Herrera
One slightly beige-white pigmented, Gram-staining negative, rod-shaped bacterium, strain M1A1T, was isolated from seawater samples obtained in Fildes Bay, Antarctica (62º12´S, 58º57´W). Phylogenetic analysis based on nearly full-length 16S rRNA gene sequences showed that the isolate shared 98.4 % 16S rRNA gene sequence identity to the type strain of the species Psychromonas arctica, but less than 97 % 16S rRNA gene sequence similarities to all other Psychromonas species. DNA-DNA hybridisation (DDH) with Psychromonas arctica DSM 14288T showed low values (21 %, reciprocal 27 %)...
January 19, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28102845/h19-let-7-lin28-reciprocal-negative-regulatory-circuit-promotes-breast-cancer-stem-cell-maintenance
#2
Fei Peng, Ting-Ting Li, Kai-Li Wang, Guo-Qing Xiao, Ju-Hong Wang, Hai-Dong Zhao, Zhi-Jie Kang, Wen-Jun Fan, Li-Li Zhu, Mei Li, Bai Cui, Fei-Meng Zheng, Hong-Jiang Wang, Eric W-F Lam, Bo Wang, Jie Xu, Quentin Liu
Long noncoding RNA-H19 (H19), an imprinted oncofetal gene, has a central role in carcinogenesis. Hitherto, the mechanism by which H19 regulates cancer stem cells, remains elusive. Here we show that breast cancer stem cells (BCSCs) express high levels of H19, and ectopic overexpression of H19 significantly promotes breast cancer cell clonogenicity, migration and mammosphere-forming ability. Conversely, silencing of H19 represses these BCSC properties. In concordance, knockdown of H19 markedly inhibits tumor growth and suppresses tumorigenesis in nude mice...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28093827/trajectories-of-sleep-and-cardiac-sympathetic-activity-indexed-by-pre-ejection-period-in-childhood
#3
Mona El-Sheikh, J Benjamin Hinnant, Lauren E Philbrook
Fragmented and insufficient sleep has been implicated in disrupted autonomic nervous system activity during resting state conditions in typically developing children. Towards explication of these relations over development, the current study tested reciprocal relations between the development of sleep parameters (efficiency, duration, latency) and cardiac sympathetic nervous system (SNS) activity indexed by pre-ejection period (PEP) during waking-resting state conditions throughout middle and late childhood...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28079112/microbes-can-help-explain-the-evolution-of-host-altruism
#4
Ohad Lewin-Epstein, Ranit Aharonov, Lilach Hadany
The evolution of altruistic behaviour, which is costly to the donor but beneficial for the recipient, is among the most intriguing questions in evolutionary biology. Several theories have been proposed to explain it, including kin selection, group selection and reciprocity. Here we propose that microbes that manipulate their hosts to act altruistically could be favoured by selection, and may play a role in the widespread occurrence of altruism. Using computational models, we find that microbe-induced altruism can explain the evolution of host altruistic behaviour under wider conditions than host-centred theories, including in a fully mixed host population, without repeating interactions or individual recognition...
January 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28077260/third-party-social-evaluations-of-humans-by-monkeys-and-dogs
#5
REVIEW
James R Anderson, Benoit Bucher, Hitomi Chijiiwa, Hika Kuroshima, Ayaka Takimoto, Kazuo Fujita
Developmental psychologists are increasingly interested in young children's evaluations of individuals based on third-party interactions. Studies have shown that infants react negatively to agents who display harmful intentions toward others, and to those who behave unfairly. We describe experimental studies of capuchin monkeys' and pet dogs' differential reactions to people who are helpful or unhelpful in third-party contexts, and monkeys' responses to people who behave unfairly in exchanges of objects with a third party...
January 7, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28075045/interplay-between-long-noncoding-rna-zeb1-as1-and-mir-200s-regulates-osteosarcoma-cell-proliferation-and-migration
#6
Chibo Liu, Chunqin Pan, Yanqun Cai, Haibao Wang
In our previous study we found long noncoding RNA ZEB1-AS1 is upregulated and functions as an oncogene in osteosarcoma. MiR-200 family (miR-200s) functions as tumor suppressor via directly targeting ZEB1 in various cancers. In this study we further investigate the potential interplay between ZEB1-AS1, miR-200s, and ZEB1 in osteosarcoma. Our results showed that ZEB1-AS1 functions as a molecular sponge for miR-200s and relieves the inhibition of ZEB1 caused by miR-200s. ZEB1-AS1 and miR-200s reciprocally negatively regulate each other...
January 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28073905/feeding-by-melanaphis-sacchari-hemiptera-aphididae-facilitates-use-of-sorghum-by-rhopalosiphum-padi-hemiptera-aphididae-but-reciprocal-effects-are-negative
#7
J P Michaud, Yun Zhang, Clint Bain
In the process of feeding, aphids modify the physiology of their host plants in species-specific ways, and plant responses to these aggressions are often genotype- or cultivar-specific. Thus, different aphid species sharing a host can influence each other's fitness via plant-mediated interactions, usually with negative and asymmetric impacts. Here, we show that feeding by the sugarcane aphid, Melanaphis sacchari Zehntner, can improve the suitability of sorghum as a host plant for the bird cherry-oat aphid, Rhopalosiphum padi L...
January 10, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28073170/loss-of-hsef-promotes-metastasis-through-up-regulation-of-emt-in-prostate-cancer
#8
S Hori, K Wadhwa, V Pisupati, V Zecchini, A Ramos-Montoya, A Y Warren, D E Neal, V J Gnanapragasam
We have previously reported that the negative regulator Similar Expression to FGF (hSef) is down-regulated in prostate cancer and its loss is associated with clinical metastasis. Here, we explored the mechanistic basis of this finding. We first confirmed our clinical observation by testing hSef manipulation in an in vivo metastasis model. hSef stable expressing cells (PC3M-hSef) or empty vector controls (PC3M-EV) were injected subcutaneously into the lateral thoracic walls of NOD-SCID gamma mice and lungs were harvested at autopsy...
January 10, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28060443/depression-impacts-the-physiological-responsiveness-of-mother-daughter-dyads-during-social-interaction
#9
Marlissa C Amole, Jill M Cyranowski, Aidan G C Wright, Holly A Swartz
BACKGROUND: Maternal depression is associated with increased risk of psychiatric illness in offspring. While risk may relate to depressed mothers' difficulties regulating emotions in the context of interacting with offspring, physiological indicators of emotion regulation have rarely been examined during mother-child interactions-and never among mother-adolescent dyads in which both mother and adolescent have histories of major depressive disorder (MDD). METHODS: We examined changes in high-frequency heart rate variability (HF-HRV), an indicator of parasympathetic (vagal) function that has been related to depression, stress, social engagement, and emotion regulation, in 46 mother-daughter dyads (23 in which both mother and daughter had an MDD history and 23 never-depressed controls)...
January 6, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28059293/asymmetric-diffraction-from-two-component-optical-gratings-made-of-passive-and-lossy-materials
#10
Guanquan Liang, Ayman Abouraddy, Demetrios Christodoulides, Edwin L Thomas
Diffraction with asymmetric enhancement and suppression, and alternating contrast for symmetric diffraction orders is demonstrated from planar two-component optical gratings made of passive/lossy materials. Simulations agree well with the experimental diffraction pattern of the fabricated sample. Our fabrication approach uses simple, standard planar micro/nano lithography employing one photoresist and one dye. No 3D profiling is needed. The phenomena is due to the left-right asymmetric material distribution in the periodic grating, which gives rise to non-reciprocal light coupling for diffraction to the positive and negative orders...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28056225/xenorhabdus-thuongxuanensis-sp-nov-and-xenorhabdus-eapokensis-sp-nov-isolated-from-steinernema-species
#11
Peter Kämpfer, Nicholas J Tobias, Long Phan Ke, Helge B Bode, Stefanie P Glaeser
Two slightly yellowish pigmented, oxidase-negative, rod-shaped and Gram-negative bacterial strains (30TX1T and DL20T), isolated from Steinernema sangi and Steinernema eapokense, respectively, during soil sampling in Vietnam were studied in a polyphasic taxonomic approach. Strain 30TX1T showed highest 16S rRNA gene sequence similarity to Xenorhabdus ehlersii (98.9%) and strain DL20T to Xenorhabdus ishibashii (98.7%). Sequence similarities to all other Xenorhabdus species were lower (< 98.4%). The two strains shared 98% 16S rRNA gene sequence similarity...
January 4, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28027009/you-get-what-you-give-understanding-reply-reciprocity-and-social-capital-in-online-health-support-forums
#12
Wenjing Pan, Cuihua Shen, Bo Feng
Adopting a social network analysis approach, the present study examined social capital and network dynamics of online support seeking and support provision in a depression forum. We constructed a depression forum network by mapping out all of the users and the reply ties among them. The findings showed a consistently reciprocal pattern between users' replies sent to others and replies received from others. Forum users' bridging social capital was positively associated with the source diversity of their received replies and negatively associated with the average length of their received replies...
January 2017: Journal of Health Communication
https://www.readbyqxmd.com/read/28018025/facing-famine-somali-experiences-in-the-famine-of-2011
#13
Daniel Maxwell, Nisar Majid, Guhad Adan, Khalif Abdirahman, Jeeyon Janet Kim
In 2011-12, Somalia experienced the worst famine of the twenty- first century. Since then, research on the famine has focused almost exclusively on the external response, the reasons for the delay in the international response, and the implications for international humanitarian action in the context of the "global war on terror." This paper focuses on the internal, Somali response to the famine. Themes of diversification, mobility and flexibility are all important to understanding how people coped with the famine, but this paper focuses on the factor that seemed to determine whether and how well people survived the famine: social connectedness, the extent of the social networks of affected populations, and the ability of these networks to mobilize resources...
December 2016: Food Policy
https://www.readbyqxmd.com/read/28005969/mixed-infections-of-four-viruses-the-incidence-and-phylogenetic-relationships-of-sweet-potato-chlorotic-fleck-virus-betaflexiviridae-isolates-in-wild-species-and-sweetpotatoes-in-uganda-and-evidence-of-distinct-isolates-in-east-africa
#14
Arthur K Tugume, Settumba B Mukasa, Jari P T Valkonen
Viruses infecting wild flora may have a significant negative impact on nearby crops, and vice-versa. Only limited information is available on wild species able to host economically important viruses that infect sweetpotatoes (Ipomoea batatas). In this study, Sweet potato chlorotic fleck virus (SPCFV; Carlavirus, Betaflexiviridae) and Sweet potato chlorotic stunt virus (SPCSV; Crinivirus, Closteroviridae) were surveyed in wild plants of family Convolvulaceae (genera Astripomoea, Ipomoea, Hewittia and Lepistemon) in Uganda...
2016: PloS One
https://www.readbyqxmd.com/read/28005077/phosphorylated-stat5-regulates-p53-expression-via-brca1-bard1-npm1-and-mdm2
#15
Zhuo Ren, Joeri L Aerts, Hugo Vandenplas, Jiance A Wang, Olena Gorbenko, Jack P Chen, Philippe Giron, Carlo Heirman, Cleo Goyvaerts, Eldad Zacksenhaus, Mark D Minden, Vuk Stambolic, Karine Breckpot, Jacques De Grève
Signal transducer and activator of transcription 5 (STAT5) and nucleophosmin (NPM1) are critical regulators of multiple biological and pathological processes. Although a reciprocal regulatory relationship was established between STAT5A and a NPM-ALK fusion protein in T-cell lymphoma, no direct connection between STAT5 and wild-type NPM1 has been documented. Here we demonstrate a mutually regulatory relationship between STAT5 and NPM1. Induction of STAT5 phosphorylation at Y694 (P-STAT5) diminished NPM1 expression, whereas inhibition of STAT5 phosphorylation enhanced NPM1 expression...
December 22, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27994194/gene-interactions-and-genetics-for-yield-and-its-attributes-in-grass-pea-lathyrus-sativus-l
#16
A K Parihar, G P Dixit, Deepak Singh
Grain yield is a complex character representing a multiplicative end product of many yield attributes. However, understanding the genetics and inheritance that underlies yield and its component characters pose a prerequisite to attain the actual yield potential of any crop species. The knowledge pertaining to gene actions and interactions is likely to direct and strengthen the crop breeding programmes. With this objective, the present investigation was undertaken by using six generations derived from three different crosses in grass pea...
December 2016: Journal of Genetics
https://www.readbyqxmd.com/read/27965498/shaping-ability-of-protaper-next-waveone-and-reciproc-in-simulated-root-canals
#17
E M Maia Filho, R M Dos Reis Santos, Darlon M Lima, S M da Silva Pereira, Janir A Soares, R R de Jesus Tavarez, Meire C Ferreira, Ceci N Carvalho, Matheus C Bandeca, Mateus R Tonetto, Alvaro H Borges, C de Castro Rizzi
INTRODUCTION: The study aimed to compare the shaping and preservation of the original curvature of simulated curved root canals using the following instruments: Reciproc (Rcp), WaveOne (Wo), and the ProTaper Next system (Ptn). MATERIALS AND METHODS: A total of 45 resin blocks with simulated curved root canals were divided into three groups (n = 15), prepared using the Rcp (R25), Wo (25/0.8), and Ptn (X2) instruments. Standardized photographs were taken before and after canal instrumentation...
November 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27958343/hbv-maintains-electrostatic-homeostasis-by-modulating-negative-charges-from-phosphoserine-and-encapsidated-nucleic-acids
#18
Pei-Yi Su, Ching-Jen Yang, Tien-Hua Chu, Chih-Hsu Chang, Chiayn Chiang, Fan-Mei Tang, Chih-Yin Lee, Chiaho Shih
Capsid assembly and stability of hepatitis B virus (HBV) core protein (HBc) particles depend on balanced electrostatic interactions between encapsidated nucleic acids and an arginine-rich domain (ARD) of HBc in the capsid interior. Arginine-deficient ARD mutants preferentially encapsidated spliced viral RNA and shorter DNA, which can be fully or partially rescued by reducing the negative charges from acidic residues or serine phosphorylation of HBc, dose-dependently. Similarly, empty capsids without RNA encapsidation can be generated by ARD hyper-phosphorylation in insect, bacteria, and human hepatocytes...
December 13, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27942853/notch-signaling-mediated-cell-to-cell-interaction-is-dependent-on-e-cadherin-adhesion-in-adult-rat-anterior-pituitary
#19
Khongorzul Batchuluun, Morio Azuma, Takashi Yashiro, Motoshi Kikuchi
The rat anterior pituitary is composed of hormone-producing cells, non-hormone-producing cells (referred to as folliculostellate cells) and marginal layer cells. In the adult rat, progenitor cells of hormone-producing cells have recently been reported to be maintained within this non-hormone-producing cell population. In tissue, non-hormone-producing cells construct homophilic cell aggregates by the differential expression of the cell adhesion molecule E-cadherin. We have previously shown that Notch signaling, a known regulator of progenitor cells in a number of organs, is activated in the cell aggregates...
December 10, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27928009/influence-of-plasma-cell-niche-factors-on-the-recruitment-and-maintenance-of-irf4hi-plasma-cells-and-plasmablasts-in-vaccinated-siv-infected-rhesus-macaques-with-low-and-high-viremia
#20
Julia M Shaw, Leia K Miller-Novak, Venkatramanan Mohanram, Katherine McKinnon, Thorsten Demberg, Diego A Vargas-Inchaustegui, David Venzon, Marjorie Robert-Guroff
: In a recent study, we found protection following SIV exposure correlated with rectal plasma cell frequency in vaccinated female rhesus macaques. We sought to determine if these same macaques maintained high mucosal plasma cell frequencies post-infection and if this translated to reduced viremia. Although delayed SIV acquisition did not predict subsequent viral control, alterations existed in the distribution of plasma cells and plasmablasts between macaques that exhibited high or low viremia...
December 7, 2016: Journal of Virology
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