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https://www.readbyqxmd.com/read/28109038/lectin-complement-pathway-molecules-are-decreased-in-patients-with-cirrhosis-and-constitute-the-risk-of-bacterial-infections
#1
Ildiko Foldi, Tamas Tornai, David Tornai, Nora Sipeki, Zsuzsanna Vitalis, Istvan Tornai, Tamas Dinya, Peter Antal-Szalmas, Maria Papp
BACKGROUND&AIMS: Lectin pathway molecules of the complement system are synthesized by hepatocytes and have pivotal role in innate host defense against infectious organisms. Ficolins(FCNs) act as soluble pattern recognition molecules, while mannan-binding lectin serine proteases(MASPs) do as effector molecules in elimination of pathogens. We aimed to study the significance of low level of these molecules in the development of cirrhosis-associated bacterial infections, which has not been elucidated so far...
January 20, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28108840/differences-in-monoterpene-biosynthesis-and-accumulation-in-pistacia-palaestina-leaves-and-aphid-induced-galls
#2
Karin Rand, Einat Bar, Matan Ben Ari, Rachel Davidovich-Rikanati, Natalia Dudareva, Moshe Inbar, Efraim Lewinsohn
Certain insect species can induce gall formation on numerous plants species. Although the mechanism of gall development is largely unknown, it is clear that insects manipulate their hosts' anatomy, physiology, and chemistry for their own benefit. It is well known that insect-induced galls often contain vast amounts of plant defensive compounds as compared to non-colonized tissues, but it is not clear if defensive compounds can be produced in situ in the galled tissues. To answer this question, we analyzed terpene accumulation patterns and possible independent biosynthetic potential of galls induced by the aphid Baizongia pistaciae L...
January 20, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28108601/phylogenomics-using-target-restricted-assembly-resolves-intra-generic-relationships-of-parasitic-lice-phthiraptera-columbicola
#3
Bret M Boyd, Julie M Allen, Nam Nguyen, Andrew D Sweet, Tandy Warnow, Michael D Shapiro, Scott M Villa, Sarah E Bush, Dale H Clayton, Kevin P Johnson
Parasitic "wing lice" (Phthiraptera: Columbicola) and their dove and pigeon hosts are a well-recognized model system for coevolutionary studies at the intersection of micro- and macroevolution. Selection on lice in microevolutionary time occurs as pigeons and doves defend themselves against lice by preening. In turn, behavioral and morphological adaptations of the lice improve their ability to evade host defense. Over macroevolutionary time wing lice tend to cospeciate with their hosts; yet, some species of Columbicola have switched to new host species...
January 19, 2017: Systematic Biology
https://www.readbyqxmd.com/read/28108513/relb-expression-determines-the-differential-effects-of-ascorbic-acid-in-normal-and-cancer-cells
#4
Xiaowei Wei, Yong Xu, Fang Fang Xu, Luksana Chaiswing, David Schnell, Teresa Noel, Chi Wang, Jinfei Chen, Daret K St Clair, William H St Clair
Cancer cells typically experience higher oxidative stress than normal cells, such that elevating pro-oxidant levels can trigger cancer cell death. Although pre-exposure to mild oxidative agents will sensitize cancer cells to radiation, this pre-exposure may also activate the adaptive stress defense system in normal cells. Ascorbic acid (AA) is a prototype redox modulator that when infused intravenously appears to kill cancers without injury to normal tissues; however, the mechanisms involved remain elusive...
January 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28108326/neuromolecular-correlates-of-cooperation-and-conflict-during-territory-defense-in-a-cichlid-fish
#5
Chelsea A Weitekamp, Hans A Hofmann
Cooperative behavior is widespread among animals, yet the neural mechanisms have not been studied in detail. We examined cooperative territory defense behavior and associated neural activity in candidate forebrain regions in the cichlid fish, Astatotilapia burtoni. We find that a territorial male neighbor will engage in territory defense dependent on the perceived threat of the intruder. The resident male, on the other hand, engages in defense based on the size and behavior of his partner, the neighbor. In the neighbor, we find that an index of engagement correlates with neural activity in the putative homolog of the mammalian basolateral amygdala and in the preoptic area, as well as in preoptic dopaminergic neurons...
January 17, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28108010/from-avoidance-to-approach-the-influence-of-threat-of-shock-on-reward-based-decision-making
#6
Florian Bublatzky, Georg W Alpers, Andre Pittig
Potential threat can prime defensive responding and avoidance behavior, which may result in the loss of rewards. When aversive consequences do not occur, avoidance should, thus, be quickly overcome in healthy individuals. This study examined the impact of threat anticipation on reward-based decisions. Sixty-five participants completed a decision-making task in which they had to choose between high- and low-reward options. To model an approach-avoidance conflict, the high-reward option was contingent with a threat-of-shock cue; the low-reward option was contingent with a safety cue...
January 10, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28107733/glycine-increases-cold-tolerance-in-rice-via-the-regulation-of-n-uptake-physiological-characteristics-and-photosynthesis
#7
Cao Xiaochuang, Zhong Chu, Zhu Lianfeng, Zhang Junhua, Sajid Hussain, Wu Lianghuan, Jin Qianyu
To investigate the response of rice growth and photosynthesis to different nitrogen (N) sources under cold stress, hydroponic cultivation of rice was done in greenhouse, with glycine, ammonium, and nitrate as the sole N sources. The results demonstrate that exposure to low temperature reduced the rice biomass and leaf chlorophyll content, but their values in the glycine-treated plants were significantly higher than in the ammonium- and nitrate-treated plants. This might be attributed to the higher N uptake rate and root area and activity in the glycine-treated plants...
January 12, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28107688/sequencing-and-de-novo-assembly-of-visceral-mass-transcriptome-of-the-critically-endangered-land-snail-satsuma-myomphala-annotation-and-ssr-discovery
#8
Se Won Kang, Bharat Bhusan Patnaik, Hee-Ju Hwang, So Young Park, Jong Min Chung, Dae Kwon Song, Hongray Howrelia Patnaik, Jae Bong Lee, Changmu Kim, Soonok Kim, Young-Su Park, Hong Seog Park, Seung-Hwan Park, Yeon Soo Han, Jun Sang Lee, Yong Seok Lee
Satsuma myomphala is critically endangered through loss of natural habitats, predation by natural enemies, and indiscriminate collection. It is a protected species in Korea but lacks genomic resources for an understanding of varied functional processes attributable to evolutionary success under natural habitats. For assessing the genetic information of S. myomphala, we performed for the first time, de novo transcriptome sequencing and functional annotation of expressed sequences using Illumina Next-Generation Sequencing (NGS) platform and bioinformatics analysis...
October 29, 2016: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28107652/symbiont-derived-antimicrobials-contribute-to-the-control-of-the-lepidopteran-gut-microbiota
#9
Yongqi Shao, Bosheng Chen, Chao Sun, Keishi Ishida, Christian Hertweck, Wilhelm Boland
Insects develop efficient antimicrobial strategies to flourish in a bacterial world. It has long been proposed that native gut microbiota is an important component of host defense; however, the responsible species have rarely been isolated to elucidate the mechanism of action. Here we show that the dominant symbiotic bacterium Enterococcus mundtii associated with the generalist herbivore Spodoptera littoralis actively secretes a stable class IIa bacteriocin (mundticin KS) against invading bacteria, but not against other gut residents, facilitating the normal development of host gut microbiota...
January 19, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28107453/stress-marker-signatures-in-lesion-mimic-single-and-double-mutants-identify-a-crucial-leaf-age-dependent-salicylic-acid-related-defense-signal
#10
Eve Kaurilind, Mikael Brosché
Plants are exposed to abiotic and biotic stress conditions throughout their lifespans that activates various defense programs. Programmed cell death (PCD) is an extreme defense strategy the plant uses to manage unfavorable environments as well as during developmentally induced senescence. Here we investigated the role of leaf age on the regulation of defense gene expression in Arabidopsis thaliana. Two lesion mimic mutants with misregulated cell death, catalase2 (cat2) and defense no death1 (dnd1) were used together with several double mutants to dissect signaling pathways regulating defense gene expression associated with cell death and leaf age...
2017: PloS One
https://www.readbyqxmd.com/read/28107448/potential-of-endophytic-fungi-isolated-from-cotton-roots-for-biological-control-against-verticillium-wilt-disease
#11
Yuan Yuan, Hongjie Feng, Lingfei Wang, Zhifang Li, Yongqiang Shi, LiHong Zhao, Zili Feng, Heqin Zhu
Verticillium wilt is a soil-borne disease, and severely limits the development of cotton production. To investigate the role of endophytic fungi on Verticillium wilt, CEF-818 (Penicillium simplicissimum), CEF-714 (Leptosphaeria sp.), CEF-642 (Talaromyces flavus.) and CEF-193 (Acremonium sp.) isolated from cotton roots were used to assess their effects against cotton wilt disease caused by a defoliating V. dahliae strain Vd080. In the greenhouse, all treatments significantly reduced disease incidence and disease index, with the control efficacy ranging from 26% (CEF-642) to 67% (CEF-818) at 25 days (d) after inoculation...
2017: PloS One
https://www.readbyqxmd.com/read/28107438/first-insights-into-the-subterranean-crustacean-bathynellacea-transcriptome-transcriptionally-reduced-opsin-repertoire-and-evidence-of-conserved-homeostasis-regulatory-mechanisms
#12
Bo-Mi Kim, Seunghyun Kang, Do-Hwan Ahn, Jin-Hyoung Kim, Inhye Ahn, Chi-Woo Lee, Joo-Lae Cho, Gi-Sik Min, Hyun Park
Bathynellacea (Crustacea, Syncarida, Parabathynellidae) are subterranean aquatic crustaceans that typically inhabit freshwater interstitial spaces (e.g., groundwater) and are occasionally found in caves and even hot springs. In this study, we sequenced the whole transcriptome of Allobathynella bangokensis using RNA-seq. De novo sequence assembly produced 74,866 contigs including 28,934 BLAST hits. Overall, the gene sequences were most similar to those of the waterflea Daphnia pulex. In the A. bangokensis transcriptome, no opsin or related sequences were identified, and no contig aligned to the crustacean visual opsins and non-visual opsins (i...
2017: PloS One
https://www.readbyqxmd.com/read/28107353/weight-perturbation-alters-leptin-signal-transduction-in-a-region-specific-manner-throughout-the-brain
#13
Michael V Morabito, Yann Ravussin, Bridget R Mueller, Alicja A Skowronski, Kazuhisa Watanabe, Kylie S Foo, Samuel X Lee, Anders Lehmann, Stephan Hjorth, Lori M Zeltser, Charles A LeDuc, Rudolph L Leibel
Diet-induced obesity (DIO) resulting from consumption of a high fat diet (HFD) attenuates normal neuronal responses to leptin and may contribute to the metabolic defense of an acquired higher body weight in humans; the molecular bases for the persistence of this defense are unknown. We measured the responses of 23 brain regions to exogenous leptin in 4 different groups of weight- and/or diet-perturbed mice. Responses to leptin were assessed by quantifying pSTAT3 levels in brain nuclei 30 minutes following 3 mg/kg intraperitoneal leptin...
2017: PloS One
https://www.readbyqxmd.com/read/28106842/adenoviral-vectors-armed-with-cell-fusion-inducing-proteins-as-anti-cancer-agents
#14
REVIEW
Joshua Del Papa, Robin J Parks
Cancer is a devastating disease that affects millions of patients every year, and causes an enormous economic burden on the health care system and emotional burden on affected families. The first line of defense against solid tumors is usually extraction of the tumor, when possible, by surgical methods. In cases where solid tumors can not be safely removed, chemotherapy is often the first line of treatment. As metastatic cancers often become vigorously resistant to treatments, the development of novel, more potent and selective anti-cancer strategies is of great importance...
January 19, 2017: Viruses
https://www.readbyqxmd.com/read/28106766/the-anti-oxidant-defense-system-of-the-marine-polar-ciliate-euplotes-nobilii-characterization-of-the-msrb-gene-family
#15
Francesca Ricci, Federico M Lauro, Joseph J Grzymski, Robert Read, Rigers Bakiu, Gianfranco Santovito, Pierangelo Luporini, Adriana Vallesi
Organisms living in polar waters must cope with an extremely stressful environment dominated by freezing temperatures, high oxygen concentrations and UV radiation. To shed light on the genetic mechanisms on which the polar marine ciliate, Euplotes nobilii, relies to effectively cope with the oxidative stress, attention was focused on methionine sulfoxide reductases which repair proteins with oxidized methionines. A family of four structurally distinct MsrB genes, encoding enzymes specific for the reduction of the methionine-sulfoxide R-forms, were identified from a draft of the E...
January 18, 2017: Biology
https://www.readbyqxmd.com/read/28106734/glycative-stress-and-its-defense-machinery-glyoxalase-1-in-renal-pathogenesis
#16
REVIEW
Yosuke Hirakawa, Reiko Inagi
Chronic kidney disease is a major public health problem around the world. Because the kidney plays a role in reducing glycative stress, renal dysfunction results in increased glycative stress. In turn, glycative stress, especially that due to advanced glycated end products (AGEs) and their precursors such as reactive carbonyl compounds, exacerbates chronic kidney disease and is related to premature aging in chronic kidney disease, whether caused by diabetes mellitus or otherwise. Factors which hinder a sufficient reduction in glycative stress include the inhibition of anti-glycation enzymes (e...
January 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106360/federal-policy-for-the-protection-of-human-subjects-final-rule
#17
(no author information available yet)
The departments and agencies listed in this document announce revisions to modernize, strengthen, and make more effective the Federal Policy for the Protection of Human Subjects that was originally promulgated as a Common Rule in 1991. This final rule is intended to better protect human subjects involved in research, while facilitating valuable research and reducing burden, delay, and ambiguity for investigators. These revisions are an effort to modernize, simplify, and enhance the current system of oversight...
19, 2017: Federal Register
https://www.readbyqxmd.com/read/28106268/innate-immune-defense-in-the-inner-ear-mucines-are-expressed-by-the-human-endolymphatic-sac
#18
Martin N Møller, Svend Kirkeby, Per Cayé-Thomasen
The human endolymphatic sac has been shown recently to have immunological capacities and has thus been proposed as the main entity protecting the inner ear from pathogen invasion, equivalent to mucosa-associated lymphoid tissue (MALT). Although the sac expresses molecules of the innate immune system, the potential expression of members of the important mucin family has not been detailed. Thus, this paper explores endolymphatic sac expression of a number of mucins and mucin precursors. Twelve fresh tissue samples from the human endolymphatic sac were obtained during translabyrinthine surgery...
February 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28106125/baba-dependent-binding-of-helicobacter-pylori-to-human-gastric-mucins-cause-aggregation-that-inhibits-proliferation-and-is-regulated-via-arss
#19
Emma C Skoog, Médea Padra, Anna Åberg, Pär Gideonsson, Ikenna Obi, Macarena P Quintana-Hayashi, Anna Arnqvist, Sara K Lindén
Mucins in the gastric mucus layer carry a range of glycan structures, which vary between individuals, can have antimicrobial effect or act as ligands for Helicobacter pylori. Mucins from various individuals and disease states modulate H. pylori proliferation and adhesin gene expression differently. Here we investigate the relationship between adhesin mediated binding, aggregation, proliferation and adhesin gene expression using human gastric mucins and synthetic adhesin ligand conjugates. By combining measurements of optical density, bacterial metabolic activity and live/dead stains, we could distinguish bacterial aggregation from viability changes, enabling elucidation of mechanisms behind the anti-prolific effects that mucins can have...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106116/overexpression-of-mosm1-encoding-for-an-immunity-inducing-protein-from-magnaporthe-oryzae-in-rice-confers-broad-spectrum-resistance-against-fungal-and-bacterial-diseases
#20
Yongbo Hong, Yayun Yang, Huijuan Zhang, Lei Huang, Dayong Li, Fengming Song
Potential of MoSM1, encoding for a cerato-platanin protein from Magnaporthe oryzae, in improvement of rice disease resistance was examined. Transient expression of MoSM1 in rice leaves initiated hypersensitive response and upregulated expression of defense genes. When transiently expressed in tobacco leaves, MoSM1 targeted to plasma membrane. The MoSM1-overexpressing (MoSM1-OE) transgenic rice lines showed an improved resistance, as revealed by the reduced disease severity and decreased in planta pathogen growth, against 2 strains belonging to two different races of M...
January 20, 2017: Scientific Reports
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