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https://www.readbyqxmd.com/read/29209933/evaluating-the-role-of-drone-produced-chemical-signals-in-mediating-social-interactions-in-honey-bees-apis-mellifera
#1
Gabriel Villar, Megan D Wolfson, Abraham Hefetz, Christina M Grozinger
Pheromones play a critical role in shaping societies of social insects, including honey bees, Apis mellifera. While diverse functions have been ascribed to queen- and worker-produced compounds, few studies have explored the identity and function of male-produced (drone) compounds. However, several lines of evidence suggest that drones engage in a variety of social interactions inside and outside of the colony. Here we elucidate the chemical composition of extracts of the drone mandibular gland, and test the hypothesis that compounds produced in these glands, or a synthetic blend consisting of the six main compounds, mediate drone social interactions in and out of the colony...
December 6, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29208987/genome-wide-dna-methylation-changes-associated-with-olfactory-learning-and-memory-in-apis-mellifera
#2
You Li, Li-Zhen Zhang, Yao Yi, Wan-Wan Hu, Ya-Hui Guo, Zhi-Jiang Zeng, Zachary-Y Huang, Zi-Long Wang
The honeybee is a model organism for studying learning and memory formation and its underlying molecular mechanisms. While DNA methylation is well studied in caste differentiation, its role in learning and memory is not clear in honeybees. Here, we analyzed genome-wide DNA methylation changes during olfactory learning and memory process in A. mellifera using whole genome bisulfite sequencing (WGBS) method. A total of 853 significantly differentially methylated regions (DMRs) and 963 differentially methylated genes (DMGs) were identified...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29208222/using-virtual-reality-to-study-visual-performances-of-honeybees
#3
REVIEW
Patrick Schultheiss, Alexis Buatois, Aurore Avarguès-Weber, Martin Giurfa
Virtual reality (VR) offers an appealing experimental framework for studying visual performances of insects under highly controlled conditions. In the case of the honeybee Apis mellifera, this possibility may fill the gap between behavioural analyses in free-flight and cellular analyses in the laboratory. Using automated, computer-controlled systems, it is possible to generate virtual stimuli or even entire environments that can be modified to test hypotheses on bee visual behaviour. The bee itself can remain tethered in place, making it possible to record neural activity while the bees is performing behavioural tasks...
December 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/29202591/venom-immunotherapy-in-patients-with-allergic-reactions-to-insect-stings
#4
Cristoforo Incorvaia, Marina Mauro, Bruna L Gritti, Eleni Makri, Erminia Ridolo
Allergy to Hymenoptera (Apis mellifera, Vespula species, Polistes species, Vespa crabro) venom can be safely and effectively treated by venom immunotherapy (VIT), which in the 40 years since its introduction has been able to prevent reactions to stings, and to treatment as well, though systemic reactions, occasionally severe, are possible. Areas covered: We reviewed the recent literature on VIT by searching in PubMed for the terms "venom immunotherapy" and "Hymenoptera venom immunotherapy" to highlight the current status of VIT and the likely development in the coming years...
December 5, 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29202174/autosomal-and-mitochondrial-adaptation-following-admixture-a-case-study-on-the-honeybees-of-reunion-island
#5
David Wragg, Maéva Angélique Techer, Kamila Canale-Tabet, Benjamin Basso, Jean-Pierre Bidanel, Emmanuelle Labarthe, Olivier Bouchez, Yves Le Conte, Johanna Clémencet, Hélène Delatte, Alain Vignal
The honeybee population of the tropical Reunion Island is a genetic admixture of the Apis mellifera unicolor subspecies, originally described in Madagascar, and of European subspecies, mainly A.m. carnica and A. m. ligustica, regularly imported to the island since the late 19th century. We took advantage of this population to study genetic admixing of the tropical-adapted indigenous and temperate-adapted European genetic backgrounds. Whole genome sequencing of 30 workers and 6 males from Reunion, compared to samples from Europe, Madagascar, Mauritius, Rodrigues and the Seychelles, revealed the Reunion honeybee population to be composed on average of 53...
November 29, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29194936/spinosad-mediated-effects-on-the-walking-abilities-midgut-and-malpighian-tubules-of-africanized-honey-bee-workers
#6
Marcos Pereira Lopes, Kenner Morais Fernandes, Hudson Vaner Ventura Tomé, Wagner Gonzaga Gonçalves, Franciane Rosa Miranda, José Eduardo Serrão, Gustavo Ferreira Martins
BACKGROUND: The global decline in Apis mellifera colonies is attributed to multiple factors, including pesticides. The bioinsecticide spinosad was initially recognized as safe for non-target organisms; however, its toxicity has been changing this concept. Here, we investigated the survival, behavioral changes, and structural changes in the midgut and Malpighian tubules of A. mellifera treated orally with a spinosad formulation. RESULTS: The field-recommended concentration of spinosad killed 100% of the bees...
December 1, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29194737/differential-expression-of-a-fructose-receptor-gene-in-honey-bee-workers-according-to-age-and-behavioral-role
#7
Tomoyuki Takada, Taiyo Sasaki, Ryoichi Sato, Shingo Kikuta, Maki N Inoue
Honey bee (Apis mellifera) workers contribute to the maintenance of colonies in various ways. The primary functions of workers are divided into two types depending on age: young workers (nurses) primarily engage in such behaviors as cleaning and food handling within the hive, whereas older workers (foragers) acquire floral nutrients beyond the colony. Concomitant with this age-dependent change in activity, physiological changes occur in the tissues and organs of workers. Nurses supply younger larvae with honey containing high levels of glucose and supply older larvae with honey containing high levels of fructose...
December 1, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29187519/proteomics-reveals-the-molecular-underpinnings-of-stronger-learning-and-memory-in-eastern-compared-to-western-beess
#8
Lifeng Meng, Xinmei Huo, Mao Feng, Yu Fang, Bin Han, Han Hu, Fan Wu, Jianke Li
The eastern (Apis cerana cerana, Acc) and western (Apis mellifera ligustica, Aml) honeybee are two major honeybee species. Surprisingly, little is known about the fundamental molecular neurobiology of brain sub-organs of Acc and Aml. We characterized and compared the proteomes of mushroom bodies (MBs), antennal lobes (ALs) and optical lobes (OLs) in the brain of both species, and biologically validated the functions related to learning and memory. Acc and Aml have evolved similar proteome signatures in MBs and OLs to drive the domain-specific neural activities...
November 29, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29186026/antimicrobial-activity-of-bee-venom-and-melittin-against-borrelia-burgdorferi
#9
Kayla M Socarras, Priyanka A S Theophilus, Jason P Torres, Khusali Gupta, Eva Sapi
Lyme disease is a tick-borne, multi-systemic disease, caused by the bacterium Borrelia burgdorferi. Though antibiotics are used as a primary treatment, relapse often occurs after the discontinuation of antimicrobial agents. The reason for relapse remains unknown, however previous studies suggest the possible presence of antibiotic resistant Borrelia round bodies, persisters and attached biofilm forms. Thus, there is an urgent need to find antimicrobial agents suitable to eliminate all known forms of B. burgdorferi...
November 29, 2017: Antibiotics
https://www.readbyqxmd.com/read/29177374/-effects-in-rats-of-bee-wax-alcohols-d-002-on-ulcerative-colitis-induced-by-dextran-sulfate-and-ethanol
#10
Vivian Molina-Cuevas, Yazmin Ravelo-Calzado, Zullyt Zamora-Rodríguez, Miriam Noa-Puig, Maikel Valle-Clara, Yohani Pérez-Guerra, Ámbar Oyarzabal-Yera, Sonia Jiménez-Despaigne, Rosa Mas-Ferreiro
OBJECTIVES.: To investigate the effects of D-002, a mixture of 6 high molecular weight primary aliphatic alcohols, obtained from beeswax (Apis mellifera), on severe inflammatory ulcerative colitis (UC) induced by Dextran sulfate (DSS) and ethanol in rats (Ratus ratus). MATERIALS AND METHODS.: Rats were randomly distributed in six groups: a zero control to which no damage was caused, and five to which the UC was induced: a negative control (vehicle), three treated with D-002 (25, 100 and 400 mg/kg) and a positive control with sulfasalazine (200 mg/kg) (reference substance)...
April 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/29175348/safety-of-methionine-a-novel-biopesticide-to-adult-and-larval-honey-bees-apis-mellifera-l
#11
Emma N I Weeks, Daniel R Schmehl, Julie Baniszewski, Hudson V V Tomé, James P Cuda, James D Ellis, Bruce R Stevens
Methionine is an essential/indispensible amino acid nutrient required by adult and larval honey bees (Apis mellifera L. [Hymenoptera: Apidae]). Bees are unable to rear broods on pollen deficient in methionine, and reportedly behaviorally avoid collecting pollen or nectar from florets deficient in methioinine. In contrast, it has been demonstrated that methionine is toxic to certain pest insects; thus it has been proposed as an effective biopesticide. As an ecofriendly integrated pest management agent, methionine boasts a novel mode of action differentiating it from conventional pesticides, while providing non-target safety...
November 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29175033/evidence-of-varroa-mediated-deformed-wing-virus-spillover-in-hawaii
#12
Jessika Santamaria, Ethel M Villalobos, Laura E Brettell, Scott Nikaido, Jason R Graham, Stephen Martin
Varroa destructor, a parasitic mite of honey bees, is also a vector for viral diseases. The mite displays high host specificity and requires access to colonies of Apis spp. to complete its lifecycle. In contrast, the Deformed Wing Virus (DWV), one of the many viruses transmitted by V. destructor, appears to have a much broader host range. Previous studies have detected DWV in a variety of insect groups that are not directly parasitized by the mite. In this study, we take advantage of the discrete distribution of the Varroa mite in the Hawaiian archipelago to compare DWV prevalence on non-Apis flower visitors, and test whether Varroa presence is linked to a "viral spillover"...
November 21, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29172539/proteome-comparisons-between-hemolymph-of-two-honeybee-strains-apis-mellifera-ligustica-reveal-divergent-molecular-basis-in-driving-hemolymph-function-and-high-royal-jelly-secretion
#13
Zewdu Ararso, Chuan Ma, Yuping Qi, Mao Feng, Bin Han, Han Hu, Lifeng Meng, Jianke Li
Hemolymph is vital for the immunity of honeybees, and offers a way to investigate their physiological status. To gain novel insight into the functionality and molecular details of the hemolymph in driving increased Royal Jelly (RJ) production, we characterized and compared hemolymph proteomes across the larval and adult ages of Italian bees (ITbs) and Royal Jelly bees (RJbs), a stock selected from ITbs for increasing RJ output. Unprecedented in-depth proteome was attained with the identification of 3394 hemolymph proteins in both bee lines...
November 27, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29163709/the-anti-hepatocellular-carcinoma-activity-of-mel-p15-is-mediated-by-natural-killer-cells
#14
Tao Xu, Tongxing Cui, Lipan Peng, Shuai Kong, Jianqiang Zou, Xingsong Tian
Mel-P15 is a peptide derived from melittin, the main toxic component in the venom of the European honeybee Apis mellifera. In the present study, the antitumor effects of Mel-P15 and the underlying molecular mechanisms of these effects in vivo were investigated. Mel-P15 directly stimulated natural killer (NK) cell cytotoxicity in vitro, which was increased to 55.45% at a 4 µg/ml dose of Mel-P15. In the mouse liver cancer (H22) xenograft mice model, Mel-P15 suppressed tumor growth in vivo; the tumor inhibitory rate was 61...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29162882/sublethal-effects-of-imidacloprid-on-targeting-muscle-and-ribosomal-protein-related-genes-in-the-honey-bee-apis-mellifera-l
#15
Yan-Yan Wu, Qi-Hua Luo, Chun-Sheng Hou, Qiang Wang, Ping-Li Dai, Jing Gao, Yong-Jun Liu, Qing-Yun Diao
A sublethal concentration of imidacloprid can cause chronic toxicity in bees and can impact the behavior of honey bees. The nectar- and water-collecting, and climbing abilities of bees are crucial to the survival of the bees and the execution of responsibilities in bee colonies. Besides behavioral impact, data on the molecular mechanisms underlying the toxicity of imidacloprid, especially by the way of RNA-seq at the transcriptomic level, are limited. We treated Apis mellifera L. with sublethal concentrations of imidacloprid (0...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29162843/behavioral-responses-of-honey-bees-apis-mellifera-to-natural-and-synthetic-xenobiotics-in-food
#16
Ling-Hsiu Liao, Wen-Yen Wu, May R Berenbaum
While the natural foods of the western honey bee (Apis mellifera) contain diverse phytochemicals, in contemporary agroecosystems honey bees also encounter pesticides as floral tissue contaminants. Whereas some ubiquitous phytochemicals in bee foods up-regulate detoxification and immunity genes, thereby benefiting nestmates, many agrochemical pesticides adversely affect bee health even at sublethal levels. How honey bees assess xenobiotic risk to nestmates as they forage is poorly understood. Accordingly, we tested nine phytochemicals ubiquitous in nectar, pollen, or propolis, as well as five synthetic xenobiotics that frequently contaminate hives-two herbicides (atrazine and glyphosate) and three fungicides (boscalid, chlorothalonil, and prochloraz)...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29161513/insights-into-molecular-basis-of-acute-contact-toxicity-of-diverse-organic-chemical-in-honey-bee
#17
Xiao Li, Yuan Zhang, Hongna Chen, Huanhuan Li, Yong Zhao
The chemical pollutants, including pesticides and other industrial chemicals, have resulted in significant risks to the whole ecosystem. Therefore, the ecological risk assessment of chemicals is vital and necessary. Since honey bee (Apis mellifera) is probably among the most exposed species to the polluting chemicals, we focused on the in silico estimation of honey bee toxicity (HBT) of chemical and the analysis of the relevance of chemical HBT and several key physical-chemical properties and structural characteristics...
November 21, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29158015/acute-bee-paralysis-virus-occurs-in-the-asian-honey-bee-apis-cerana-and-parasitic-mite-tropilaelaps-mercedesae
#18
Pichaya Chanpanitkitchote, Yanping Chen, Jay D Evans, Wenfeng Li, Jianghong Li, Michele Hamilton, Panuwan Chantawannakul
Viruses, and especially RNA viruses, constantly change and adapt to new host species and vectors, posing a potential threat of new and reemerging infectious diseases. Honey bee Acute bee paralysis virus (ABPV) and Deformed wing virus (DWV) are two of the most common honey bee viruses found in European honey bees Apis mellifera and have been implicated in worldwide Varroa-associated bee colony losses. Previous studies have shown that DWV has jumped hosts several times in history causing infection in multiple host species...
November 17, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29157677/dna-methylation-affects-the-lifespan-of-honey-bee-apis-mellifera-l-workers-evidence-for-a-regulatory-module-that-involves-vitellogenin-expression-but-is-independent-of-juvenile-hormone-function
#19
Carlos A M Cardoso-Júnior, Karina R Guidugli-Lazzarini, Klaus Hartfelder
The canonic regulatory module for lifespan of honey bee (Apis mellifera) workers involves a mutual repressor relationship between juvenile hormone (JH) and vitellogenin (Vg). Compared to vertebrates, however, little is known about a possible role of epigenetic factors. The full genomic repertoire of DNA methyltransferases (DNMTs) makes the honey bee an attractive emergent model for studying the role of epigenetics in the aging process of invertebrates, and especially so in social insects. We first quantified the transcript levels of the four DNMTs encoding genes in the head thorax and abdomens of workers of different age, showing that dnmt1a and dnmt3 expression is up-regulated in abdomens of old workers, whereas dnmt1b and dnmt2 are down-regulated in heads of old workers...
November 20, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29152199/effect-of-pollen-and-resource-limitation-on-reproduction-of-zygophyllum-xanthoxylum-in-fragmented-habitats
#20
Min Chen, Xue-Yong Zhao
Limitations on pollen and resources may significantly affect plant reproduction in fragmented habitats. In this study, phenology and pollinator frequency and activity were investigated to estimate the role of pollinators in Zygophyllum xanthoxylum reproduction, and this species is ecologically important in northwest China. In addition, the relative impact of restrictive amounts of pollen and resources on the seed set per flower was evaluated. It was found that adding pollen boosted the size of the seed set per flower, but had no significant effect on the number of flowers...
November 2017: Ecology and Evolution
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