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cytoplasmic incompatibility

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https://www.readbyqxmd.com/read/28913925/a-cascade-of-destabilizations-combining-wolbachia-and-allee-effects-to-eradicate-insect-pests
#1
Julie C Blackwood, Roger Vargas, Xavier Fauvergue
1.The management of insect pests has long been dominated by the use of chemical insecticides, with the aim of instantaneously killing enough individuals to limit their damage. To minimize unwanted consequences, environmentally friendly approaches have been proposed that utilize biological control and take advantage of intrinsic demographic processes to reduce pest populations. 2.We address the feasibility of a novel pest management strategy based on the release of insects infected with Wolbachia, which causes cytoplasmic incompatibilities in its host population, into a population with a pre-existing Allee effect...
September 15, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28906572/culex-torrentium-mosquitoes-from-germany-are-negative-for-wolbachia
#2
M Leggewie, R Krumkamp, M Badusche, A Heitmann, S Jansen, J Schmidt-Chanasit, E Tannich, S C Becker
Wolbachia (Rickettsiales: Anaplasmataceae) infects a wide range of arthropods, including several mosquito species. The bacterium is known to induce a plethora of phenotypes in its host, examples being the reproductive phenotype cytoplasmic incompatibility or resistance against infection with arboviruses. The latter is especially relevant when assessing the vector competence of mosquito species for emerging arboviruses. Thus, knowledge of Wolbachia infection status is important for the assessment of vector competence...
September 14, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28902188/reproductive-interference-and-fecundity-affect-competitive-interactions-of-sibling-species-with-low-mating-barriers-experimental-and-theoretical-evidence
#3
M Gebiola, S E Kelly, L Velten, R Zug, P Hammerstein, M Giorgini, M S Hunter
When allopatric species with incomplete prezygotic isolation come into secondary contact, the outcome of their interaction is not easily predicted. The parasitoid wasp Encarsia suzannae (iES), infected by Cardinium inducing cytoplasmic incompatibility (CI), and its sibling species E. gennaroi (EG), not infected by bacterial endosymbionts, may have diverged because of the complementary action of CI and asymmetric hybrid incompatibilities. Whereas postzygotic isolation is now complete because of sterility of F1 hybrid progeny, prezygotic isolation is still incipient...
September 13, 2017: Heredity
https://www.readbyqxmd.com/read/28878066/cytological-analysis-of-cytoplasmic-incompatibility-induced-by-cardinium-suggests-convergent-evolution-with-its-distant-cousin-wolbachia
#4
Marco Gebiola, Massimo Giorgini, Suzanne E Kelly, Matthew R Doremus, Patrick M Ferree, Martha S Hunter
Cytoplasmic incompatibility (CI) is a conditional sterility in numerous arthropods that is caused by inherited, intracellular bacteria such as Wolbachia Matings between males carrying CI-inducing Wolbachia and uninfected females, or between males and females infected with different Wolbachia strains, result in progeny that die during very early embryogenesis. Multiple studies in diploid (Drosophila) and haplodiploid (Nasonia) insects have shown that CI-Wolbachia cause a failure of the paternally derived chromatin from resolving into distinct chromosomes...
September 13, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28716408/molecular-and-biochemical-characterization-of-a-vigna-mungo-map-kinase-associated-with-mungbean-yellow-mosaic-india-virus-infection-and-deciphering-its-role-in-restricting-the-virus-multiplication
#5
Anju Patel, Nrisingha Dey, Shubho Chaudhuri, Amita Pal
Yellow Mosaic Disease caused by the begomovirus Mungbean Yellow Mosaic India Virus (MYMIV) severely affects many economically important legumes. Recent investigations in Vigna mungo - MYMIV incompatible interaction identified a MAPK homolog in the defense signaling pathway. An important branch of immunity involves phosphorylation by evolutionary conserved Mitogen-activated protein kinases (MAPK) that transduce signals of pathogen invasion to downstream molecules leading to diverse immune responses. However, most of the knowledge of MAPKs is derived from model crops, and functions of these versatile kinases are little explored in legumes...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28586142/experimental-hybridization-and-reproductive-isolation-between-two-sympatric-species-of-tephritid-fruit-flies-in-the-anastrepha-fraterculus-species-group
#6
Juan Rull, Eduardo Tadeo, Rodrigo Lasa, Christian L Rodríguez, Alma Altuzar-Molina, Martín Aluja
Among tephritid fruit flies, hybridzation has been found to produce local adaptation and speciation, and in the case of pest species, induce behavioral and ecological alterations that can adversely impact efficient pest management. The fraterculus species group within Anastrepha (Diptera: Tephritidae), is a rapidly radiating aggregate, which includes cryptic species complexes, numerous sister species, and several pest species. Molecular studies have highlighted the possibility of introgression between A. fraterculus and A...
June 6, 2017: Insect Science
https://www.readbyqxmd.com/read/28570608/the-spread-of-wolbachia-through-mosquito-populations
#7
Francis M Jiggins
In many regions of the world, mosquito-borne viruses pose a growing threat to human health. As an alternative to traditional control measures, the bacterial symbiont Wolbachia has been transferred from Drosophila into the mosquito Aedes aegypti, where it can block the transmission of dengue and Zika viruses. A recent paper has reported large-scale releases of Wolbachia-infected Ae. aegypti in the city of Cairns, Australia. Wolbachia, which is maternally transmitted, invaded and spread through the populations due to a sperm-egg incompatibility called cytoplasmic incompatibility...
June 2017: PLoS Biology
https://www.readbyqxmd.com/read/28566542/wolbachia-induced-meiotic-drive-and-feminization-is-associated-with-an-independent-occurrence-of-selective-mitochondrial-sweep-in-a-butterfly
#8
Mai Miyata, Tatsuro Konagaya, Kenji Yukuhiro, Masashi Nomura, Daisuke Kageyama
Maternally inherited Wolbachia endosymbionts manipulate arthropod reproduction in various ways. In the butterfly Eurema mandarina, a cytoplasmic incompatibility-inducing Wolbachia strain wCI and the associated mtDNA haplotypes are known to originate from the sister species Eurema hecabe, which offered a good case study for microbe-mediated hybrid introgression. Besides wCI, some females with the Z0 karyotype harbour a distinct Wolbachia strain wFem, which causes all-female production by meiotic drive and feminization...
May 2017: Biology Letters
https://www.readbyqxmd.com/read/28533374/unique-clade-of-alphaproteobacterial-endosymbionts-induces-complete-cytoplasmic-incompatibility-in-the-coconut-beetle
#9
Shun-Ichiro Takano, Midori Tuda, Keiji Takasu, Naruto Furuya, Yuya Imamura, Sangwan Kim, Kosuke Tashiro, Kazuhiro Iiyama, Matias Tavares, Acacio Cardoso Amaral
Maternally inherited bacterial endosymbionts in arthropods manipulate host reproduction to increase the fitness of infected females. Cytoplasmic incompatibility (CI) is one such manipulation, in which uninfected females produce few or no offspring when they mate with infected males. To date, two bacterial endosymbionts, Wolbachia and Cardinium, have been reported as CI inducers. Only Wolbachia induces complete CI, which causes 100% offspring mortality in incompatible crosses. Here we report a third CI inducer that belongs to a unique clade of Alphaproteobacteria detected within the coconut beetle, Brontispa longissima This beetle comprises two cryptic species, the Asian clade and the Pacific clade, which show incompatibility in hybrid crosses...
June 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28507804/hla-dependent-immune-escape-mechanisms-in-b-cell-lymphomas-implications-for-immune-checkpoint-inhibitor-therapy
#10
Marcel Nijland, Rianne N Veenstra, Lydia Visser, Chuanhui Xu, Kushi Kushekhar, Gustaaf W van Imhoff, Philip M Kluin, Anke van den Berg, Arjan Diepstra
Antigen presentation by tumor cells in the context of Human Leukocyte Antigen (HLA) is generally considered to be a prerequisite for effective immune checkpoint inhibitor therapy. We evaluated cell surface HLA class I, HLA class II and cytoplasmic HLA-DM staining by immunohistochemistry (IHC) in 389 classical Hodgkin lymphomas (cHL), 22 nodular lymphocyte predominant Hodgkin lymphomas (NLPHL), 137 diffuse large B-cell lymphomas (DLBCL), 39 primary central nervous system lymphomas (PCNSL) and 19 testicular lymphomas...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28412513/wolbachia-induced-loss-of-male-fertility-is-likely-related-to-branch-chain-amino-acid-biosynthesis-and-ilve-in-laodelphax-striatellus
#11
COMPARATIVE STUDY
Jia-Fei Ju, Ary A Hoffmann, Yan-Kai Zhang, Xing-Zhi Duan, Yan Guo, Jun-Tao Gong, Wen-Chao Zhu, Xiao-Yue Hong
Wolbachia are endosymbionts that infect many species of arthropods and nematodes. Wolbachia-induced cytoplasmic incompatibility (CI) is the most common phenotype in affected hosts, involving embryonic lethality in crosses between Wolbachia-infected males and uninfected females. The molecular mechanisms underlying this phenomenon are currently unclear. Here we examine the molecular correlates of the Wolbachia infection in Laodelphax striatellus (Fallén), an important rice pest, where embryonic lethality is strong and almost complete...
June 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28411063/deploying-dengue-suppressing-wolbachia-robust-models-predict-slow-but-effective-spatial-spread-in-aedes-aegypti
#12
Michael Turelli, Nicholas H Barton
A novel strategy for controlling the spread of arboviral diseases such as dengue, Zika and chikungunya is to transform mosquito populations with virus-suppressing Wolbachia. In general, Wolbachia transinfected into mosquitoes induce fitness costs through lower viability or fecundity. These maternally inherited bacteria also produce a frequency-dependent advantage for infected females by inducing cytoplasmic incompatibility (CI), which kills the embryos produced by uninfected females mated to infected males...
June 2017: Theoretical Population Biology
https://www.readbyqxmd.com/read/28403439/advances-in-vector-control-science-rear-and-release-strategies-show-promise%C3%A2-but-don-t-forget-the-basics
#13
Scott A Ritchie, Brian J Johnson
Both chikungunya and Zika viruses have recently swept from Africa across the Pacific to the Americas, causing major outbreaks of disease in humans. In the meantime, dengue epidemics continue throughout the tropics. Traditional vector control programs based on strategies from 1950s and 1960s have been relatively ineffective in combating recent epidemics. In response, new methods involving the rearing and releasing of large numbers of mosquitoes to eliminate or modify local Aedes populations are being developed, with several currently conducting field releases in high-risk countries...
March 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28295812/hybridization-between-two-cryptic-filamentous-brown-seaweeds-along-the-shore-analysing-pre-and-postzygotic-barriers-in-populations-of-individuals-with-varying-ploidy-levels
#14
Alejandro E Montecinos, Marie-Laure Guillemin, Lucia Couceiro, Akira F Peters, Solenn Stoeckel, Myriam Valero
We aimed to study the importance of hybridization between two cryptic species of the genus Ectocarpus, a group of filamentous algae with haploid-diploid life cycles that include the principal genetic model organism for the brown algae. In haploid-diploid species, the genetic structure of the two phases of the life cycle can be analysed separately in natural populations. Such life cycles provide a unique opportunity to estimate the frequency of hybrid genotypes in diploid sporophytes and meiotic recombinant genotypes in haploid gametophytes allowing the effects of reproductive barriers preventing fertilization or preventing meiosis to be untangle...
March 12, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28256191/molecular-mechanisms-regulating-cell-fusion-and-heterokaryon-formation-in-filamentous-fungi
#15
REVIEW
Asen Daskalov, Jens Heller, Stephanie Herzog, André Fleißner, N Louise Glass
For the majority of fungal species, the somatic body of an individual is a network of interconnected cells sharing a common cytoplasm and organelles. This syncytial organization contributes to an efficient distribution of resources, energy, and biochemical signals. Cell fusion is a fundamental process for fungal development, colony establishment, and habitat exploitation and can occur between hyphal cells of an individual colony or between colonies of genetically distinct individuals. One outcome of cell fusion is the establishment of a stable heterokaryon, culminating in benefits for each individual via shared resources or being of critical importance for the sexual or parasexual cycle of many fungal species...
March 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28248294/a-wolbachia-deubiquitylating-enzyme-induces-cytoplasmic-incompatibility
#16
John F Beckmann, Judith A Ronau, Mark Hochstrasser
Wolbachia are obligate intracellular bacteria(1) that infect arthropods, including approximately two-thirds of insect species(2). Wolbachia manipulate insect reproduction by enhancing their inheritance through the female germline. The most common alteration is cytoplasmic incompatibility (CI)(3-5), where eggs from uninfected females fail to develop when fertilized by sperm from Wolbachia-infected males. By contrast, if female and male partners are both infected, embryos are viable. CI is a gene-drive mechanism impacting population structure(6) and causing reproductive isolation(7), but its molecular mechanism has remained unknown...
March 1, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28241146/prophage-wo-genes-recapitulate-and-enhance-wolbachia-induced-cytoplasmic-incompatibility
#17
Daniel P LePage, Jason A Metcalf, Sarah R Bordenstein, Jungmin On, Jessamyn I Perlmutter, J Dylan Shropshire, Emily M Layton, Lisa J Funkhouser-Jones, John F Beckmann, Seth R Bordenstein
The genus Wolbachia is an archetype of maternally inherited intracellular bacteria that infect the germline of numerous invertebrate species worldwide. They can selfishly alter arthropod sex ratios and reproductive strategies to increase the proportion of the infected matriline in the population. The most common reproductive manipulation is cytoplasmic incompatibility, which results in embryonic lethality in crosses between infected males and uninfected females. Females infected with the same Wolbachia strain rescue this lethality...
March 9, 2017: Nature
https://www.readbyqxmd.com/read/28208639/biological-control-strategies-for-mosquito-vectors-of-arboviruses
#18
REVIEW
Yan-Jang S Huang, Stephen Higgs, Dana L Vanlandingham
Historically, biological control utilizes predatory species and pathogenic microorganisms to reduce the population of mosquitoes as disease vectors. This is particularly important for the control of mosquito-borne arboviruses, which normally do not have specific antiviral therapies available. Although development of resistance is likely, the advantages of biological control are that the resources used are typically biodegradable and ecologically friendly. Over the past decade, the advancement of molecular biology has enabled optimization by the manipulation of genetic materials associated with biological control agents...
February 10, 2017: Insects
https://www.readbyqxmd.com/read/28181227/independent-cytoplasmic-incompatibility-induced-by-cardinium-and-wolbachia-maintains-endosymbiont-coinfections-in-haplodiploid-thrips-populations
#19
Duong T Nguyen, Jennifer L Morrow, Robert N Spooner-Hart, Markus Riegler
Cardinium and Wolbachia are common maternally inherited reproductive parasites that can coinfect arthropods, yet interactions between both bacterial endosymbionts are rarely studied. For the first time, we report their independent expression of complete cytoplasmic incompatibility (CI) in a coinfected host, and CI in a species of the haplodiploid insect order Thysanoptera. In Pezothrips kellyanus, Cardinium-induced CI resulted in a combination of male development (MD) and embryonic female mortality (FM) of fertilized eggs...
April 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28110970/-plasma-exchange-in-nephrology-indications-and-technique
#20
Christophe Ridel, Sébastien Kissling, Laurent Mesnard, Alexandre Hertig, Éric Rondeau
Plasma exchange is a non-selective apheresis technique that can be performed by filtration or centrifugation allowing rapid purification of high molecular weight pathogens. An immunosuppressive treatment is generally associated to reduce the rebound effect of the purified substance. Substitution solutes such as human albumin and macromolecules are needed to compensate for plasma extraction. Compensation by viro-attenuated plasma is reserved solely for the treatment of thrombotic microangiopathies or when there is a risk of bleeding, because this product is very allergenic and expensive...
February 2017: Néphrologie & Thérapeutique
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