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cytoplasmic incompatibility

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https://www.readbyqxmd.com/read/29146940/development-and-physiological-effects-of-an-artificial-diet-for-wolbachia-infected-aedes-aegypti
#1
Heverton Leandro Carneiro Dutra, Silvia Lomeu Rodrigues, Simone Brutman Mansur, Sofia Pimenta de Oliveira, Eric Pearce Caragata, Luciano Andrade Moreira
The endosymbiotic bacterium Wolbachia spreads rapidly through populations of Aedes aegypti mosquitoes, and strongly inhibits infection with key human pathogens including the dengue and Zika viruses. Mosquito control programs aimed at limiting transmission of these viruses are ongoing in multiple countries, yet there is a dearth of mass rearing infrastructure specific to Wolbachia-infected mosquitoes. One example is the lack of a blood meal substitute, which accounts for the Wolbachia-specific physiological changes in infected mosquitoes, that allows the bacterium to spread, and block viral infections...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141766/molecular-detection-and-characterization-of-wolbachia-pipientis-from-culex-quinquefasciatus-collected-from-lahore-pakistan
#2
Muhammad Sajjad Sarwar, Nusrat Jahan, Fatima Shahbaz
The gram-negative, pleomorphic endosymbiont Wolbachia is known to infect a large number of insects and other arthropods naturally. This bacterium modifies the host biology, mainly causing reproductive alterations including feminization, death of male, parthenogenesis, and importantly cytoplasmic incompatibility. Wolbachia-induced cytoplasmic incompatibility results in nonviable offspring and vector population suppression. In addition, this bacterium rapidly spreads and propagates within the host population...
October 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29066721/multiscale-modelling-the-effects-of-ci-genetic-evolution-in-mosquito-population-on-the-control-of-dengue-fever
#3
Sha He, Xianghong Zhang, Juhua Liang, Sanyi Tang
Endosymbiotic Wolbachia bacteria are widely applied for the control of dengue fever by manipulating the reproductive mechanism of mosquitoes, including maternal inheritance and cytoplasmic incompatibility (CI). CI means that the offsprings from the matings between Wolbachia infected males and uninfected females can not be hatched. At present, CI effect is assumed as a constant in most of dynamic systems for the spread of Wolbachia. However, their spread may arouse the evolution of mosquitoes to resist CI. Thus, a multiscale model combining a birth-pulse model with a gene-induced discrete model for the frequencies of alleles is proposed to describe the spread of Wolbachia in mosquito population with resistance allele of CI...
October 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28983298/regulated-forms-of-cell-death-in-fungi
#4
REVIEW
A Pedro Gonçalves, Jens Heller, Asen Daskalov, Arnaldo Videira, N Louise Glass
Cell death occurs in all domains of life. While some cells die in an uncontrolled way due to exposure to external cues, other cells die in a regulated manner as part of a genetically encoded developmental program. Like other eukaryotic species, fungi undergo programmed cell death (PCD) in response to various triggers. For example, exposure to external stress conditions can activate PCD pathways in fungi. Calcium redistribution between the extracellular space, the cytoplasm and intracellular storage organelles appears to be pivotal for this kind of cell death...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28977579/the-rio1p-atpase-hinders-premature-entry-into-translation-of-late-pre-40s-pre-ribosomal-particles
#5
Kamila Belhabich-Baumas, Clément Joret, Beáta E Jády, Célia Plisson-Chastang, Ramtin Shayan, Christophe Klopp, Anthony K Henras, Yves Henry, Annie Mougin
Cytoplasmic maturation of precursors to the small ribosomal subunit in yeast requires the intervention of a dozen assembly factors (AFs), the precise roles of which remain elusive. One of these is Rio1p that seems to intervene at a late step of pre-40S particle maturation. We have investigated the role played by Rio1p in the dynamic association and dissociation of AFs with and from pre-40S particles. Our results indicate that Rio1p depletion leads to the stalling of at least 4 AFs (Nob1p, Tsr1p, Pno1p/Dim2p and Fap7p) in 80S-like particles...
October 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28957585/identification-and-characterization-of-bacterial-symbionts-in-three-species-of-filth-fly-parasitoids
#6
Kfir Betelman, Ayelet Caspi-Fluger, Maayan Shamir, Elad Chiel
Facultative bacterial symbionts are widespread among insects and have diverse effects on their biology. Here, we focused on bacterial symbionts of three ecologically and economically important filth flies parasitoid species-Spalangia cameroni, Spalangia endius and Muscidifurax raptor. Both Spalangia species harbored a Sodalis bacterium that is closely related to Spalangia praecaptivus (a free-living bacterium) and to Sodalis symbionts of weevils. This is the only case of Sodalis infection in the important order Hymenoptera...
September 1, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28913925/a-cascade-of-destabilizations-combining-wolbachia-and-allee-effects-to-eradicate-insect-pests
#7
Julie C Blackwood, Roger Vargas, Xavier Fauvergue
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. 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
#8
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
#9
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...
December 2017: Heredity
https://www.readbyqxmd.com/read/28878066/cytological-analysis-of-cytoplasmic-incompatibility-induced-by-cardinium-suggests-convergent-evolution-with-its-distant-cousin-wolbachia
#10
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
#11
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
#12
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
#13
REVIEW
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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