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https://www.readbyqxmd.com/read/29319931/metaproteomics-of-colonic-microbiota-unveils-discrete-protein-functions-among-colitic-mice-and-control-groups
#1
Clara Moon, Gregory S Stupp, Andrew I Su, Dennis W Wolan
Metaproteomics can greatly assist established high-throughput sequencing methodologies to provide systems biological insights into the alterations of microbial protein functionalities correlated with disease-associated dysbiosis of the intestinal microbiota. Here, we utilized the well-characterized murine T cell transfer model of colitis to find specific changes within the intestinal luminal proteome associated with inflammation. MS proteomic analysis of colonic samples permitted the identification of ∼10,000-12,000 unique peptides that corresponded to 5,610 protein clusters identified across three groups, including the colitic Rag1-/- T cell recipients, isogenic Rag1-/- controls, and wild-type mice...
January 10, 2018: Proteomics
https://www.readbyqxmd.com/read/29311654/bidirectional-modulation-between-infiltrating-cd3-t-lymphocytes-and-astrocytes-in-the-spinal-cord-drives-the-development-of-allodynia-in-monoarthritic-rats
#2
Ya-Lan Zhou, Shu-Zhuan Zhou, Hao-Ling Li, Man-Li Hu, Hui Li, Qing-Huan Guo, Xiao-Ming Deng, Yu-Qiu Zhang, Hua Xu
Increasing evidence suggests that T cells and glia participate in the process of neuropathic pain. However, little is known about the involvement of T cells or the interaction between glia and T cells at the molecular level. Here we investigated the phenotype of T cell infiltration into the spinal cord in inflammatory pain and explored potential crosstalk between glia and T cells. The establishment of monoarthritis produced T cell infiltration and astrocyte activation, exhibiting similar kinetics in the spinal cord...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29311549/lamin-a-c-augments-th1-differentiation-and-response-against-vaccinia-virus-and-leishmania-major
#3
Raquel Toribio-Fernández, Virginia Zorita, Vera Rocha-Perugini, Salvador Iborra, Gloria Martínez Del Hoyo, Raphael Chevre, Beatriz Dorado, David Sancho, Francisco Sanchez-Madrid, Vicente Andrés, Jose-Maria Gonzalez-Granado
Differentiation of naive CD4+ T-cells into functionally distinct T helper (Th) subsets is critical to immunity against pathogen infection. Little is known about the role of signals emanating from the nuclear envelope for T-cell differentiation. The nuclear envelope protein lamin A/C is induced in naive CD4+ T-cells upon antigen recognition and acts as a link between the nucleus and the plasma membrane during T-cell activation. Here we demonstrate that the absence of lamin A/C in naive T-cell reduces Th1 differentiation without affecting Th2 differentiation in vitro and in vivo...
January 8, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29306503/a-mouse-model-with-age-dependent-immune-response-and-immune-tolerance-for-hbv-infection
#4
Xuerui Yi, Youcheng Yuan, Na Li, Lu Yi, Cuiling Wang, Ying Qi, Liang Gong, Guangze Liu, Xiangping Kong
BACKGROUND: Viral clearance of human HBV infection largely depends on the age of exposure. Thus, a mouse model with age-dependent immune response and immune-tolerance for HBV infection was established. METHODS: HBVRag1 mice were generated by crossing Rag1-/- mice with HBV-Tg mice. Following adoptive transfer of splenocytes adult (8-9 weeks old) and young (3 weeks old) HBVRag1 mice were named as HBVRag-ReA and HBVRag-ReY mice respectively. The biochemical parameters that were associated with viral load and immune function, as well as the histological evaluation of the liver tissues between the two mouse models were detected...
January 3, 2018: Vaccine
https://www.readbyqxmd.com/read/29296022/targeting-immune-checkpoints-potentiates-immunoediting-and-changes-the-dynamics-of-tumor-evolution
#5
Mirjana Efremova, Dietmar Rieder, Victoria Klepsch, Pornpimol Charoentong, Francesca Finotello, Hubert Hackl, Natascha Hermann-Kleiter, Martin Löwer, Gottfried Baier, Anne Krogsdam, Zlatko Trajanoski
The cancer immunoediting hypothesis postulates a dual role of the immune system: protecting the host by eliminating tumor cells, and shaping the tumor by editing its genome. Here, we elucidate the impact of evolutionary and immune-related forces on editing the tumor in a mouse model for hypermutated and microsatellite-instable colorectal cancer. Analyses of wild-type and immunodeficient RAG1 knockout mice transplanted with MC38 cells reveal that upregulation of checkpoint molecules and infiltration by Tregs are the major tumor escape mechanisms...
January 2, 2018: Nature Communications
https://www.readbyqxmd.com/read/29287983/inducible-nitric-oxide-synthase-in-innate-immune-cells-is-important-for-restricting-cyst-formation-of-toxoplasma-gondii-in-the-brain-but-not-required-for-the-protective-immune-process-to-remove-the-cysts
#6
Qila Sa, Ashish Tiwari, Eri Ochiai, Jeremi Mullins, Yasuhiro Suzuki
Significantly larger numbers of Toxoplasma gondii cysts were detected in the brains of RAG1-/-NOS2-/- than RAG1-/- mice following infection. In contrast, the cyst numbers markedly decreased in a same manner in both strains of mice after receiving CD8+ immune T cells. Thus, NOS2-mediated innate immunity is important for inhibiting formation of cysts in the brain but not required for the T cell-initiated cyst removal, which is associated with phagocyte accumulation. Treatment with chloroquine, an inhibitor of endolysosomal acidification, partially but significantly inhibited the T cell-mediated cyst removal, suggesting that phagosome-lysomose fusion could be involved in the T...
December 26, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/29276513/multidimensional-analysis-integrating-human-t-cell-signatures-in-lymphatic-tissues-with-sex-of-humanized-mice-for-prediction-of-responses-after-dendritic-cell-immunization
#7
Valery Volk, Andreas I Reppas, Philippe A Robert, Loukia M Spineli, Bala Sai Sundarasetty, Sebastian J Theobald, Andreas Schneider, Laura Gerasch, Candida Deves Roth, Stephan Klöss, Ulrike Koehl, Constantin von Kaisenberg, Constanca Figueiredo, Haralampos Hatzikirou, Michael Meyer-Hermann, Renata Stripecke
Mice transplanted with human cord blood-derived hematopoietic stem cells (HSCs) became a powerful experimental tool for studying the heterogeneity of human immune reconstitution and immune responses in vivo. Yet, analyses of human T cell maturation in humanized models have been hampered by an overall low immune reactivity and lack of methods to define predictive markers of responsiveness. Long-lived human lentiviral induced dendritic cells expressing the cytomegalovirus pp65 protein (iDCpp65) promoted the development of pp65-specific human CD8+ T cell responses in NOD...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29262351/the-xenobiotic-transporter-mdr1-enforces-t-cell-homeostasis-in-the-presence-of-intestinal-bile-acids
#8
Wei Cao, Hisako Kayama, Mei Lan Chen, Amber Delmas, Amy Sun, Sang Yong Kim, Erumbi S Rangarajan, Kelly McKevitt, Amanda P Beck, Cody B Jackson, Gogce Crynen, Angelos Oikonomopoulos, Precious N Lacey, Gustavo J Martinez, Tina Izard, Robin G Lorenz, Alex Rodriguez-Palacios, Fabio Cominelli, Maria T Abreu, Daniel W Hommes, Sergei B Koralov, Kiyoshi Takeda, Mark S Sundrud
CD4+ T cells are tightly regulated by microbiota in the intestine, but whether intestinal T cells interface with host-derived metabolites is less clear. Here, we show that CD4+ T effector (Teff) cells upregulated the xenobiotic transporter, Mdr1, in the ileum to maintain homeostasis in the presence of bile acids. Whereas wild-type Teff cells upregulated Mdr1 in the ileum, those lacking Mdr1 displayed mucosal dysfunction and induced Crohn's disease-like ileitis following transfer into Rag1-/- hosts. Mdr1 mitigated oxidative stress and enforced homeostasis in Teff cells exposed to conjugated bile acids (CBAs), a class of liver-derived emulsifying agents that actively circulate through the ileal mucosa...
December 19, 2017: Immunity
https://www.readbyqxmd.com/read/29250463/introgression-between-ecologically-distinct-species-following-increased-salinity-in-the-colorado-delta-worldwide-implications-for-impacted-estuary-diversity
#9
Clive L F Lau, David K Jacobs
We investigate hybridization and introgression between ecologically distinct sister species of silverside fish in the Gulf of California through combined analysis of morphological, sequence, and genotypic data. Water diversions in the past century turned the Colorado River Delta from a normal estuary to a hypersaline inverse estuary, raising concerns for the local fauna, much of which is endangered. Salinity differences are known to generate ecological species pairs and we anticipated that loss of the fresher-water historic salinity regime could alter the adaptive factors maintaining distinction between the broadly distributed Gulf-endemic Colpichthys regis and the narrowly restricted Delta-endemic Colpichthys hubbsi, the species that experienced dramatic environmental change...
2017: PeerJ
https://www.readbyqxmd.com/read/29245684/revision-of-the-horseface-loaches-cobitidae-i-acantopsis-i-with-descriptions-of-three-new-species-from-southeast-asia
#10
David A Boyd, Patchara Nithirojpakdee, Gridsada Deein, Chavalit Vidthayanon, Chaiwut Grudpan, Weerapongse Tangjitjaroen, John M Pfeiffer, Zachary S Randall, Tippamas Srisombat, Lawrence M Page
Acantopsis (Cobitidae) is revised based on analysis of morphological and molecular data. Four of the six available names, A. dialuzona, A. spectabilis, A. octoactinotos, and A. thiemmedhi, are valid, and three new species, A. rungthipae, A. dinema, and A. ioa, are described. All species are described morphologically, distributions are mapped, and relationships are discussed for those for which molecular data (CO1, RAG1) are available. Labial barbels, color pattern, and meristic counts are the most diagnostic features...
October 31, 2017: Zootaxa
https://www.readbyqxmd.com/read/29245683/molecular-evidence-supporting-the-expansion-of-the-geographical-distribution-of-the-brazilian-cownose-ray-i-rhinoptera-i-i-brasiliensis%C3%A2-i-myliobatiformes-rhinopteridae-in-the-western-atlantic
#11
Paola Palacios-Barreto, Vanessa P Cruz, Fausto Foresti, Bianca DE S Rangel, Manuel Uribe-Alcocer, Píndaro Díaz-Jaimes
The genus Rhinoptera is composed of eight species widely distributed in tropical, subtropical and temperate coastal waters, which inhabit bays, estuaries and river mouths. Cownose ray Rhinoptera bonasus has been reported to inhabit the Western Atlantic including the Gulf of Mexico and the Caribbean, whereas the Brazilian cownose ray R. brasiliensis has been considered endemic to the coast of Brazil. Recent reports of R. brasiliensis in the Gulf of Mexico bring about the question of whether the species has a wider range than previously reported...
November 1, 2017: Zootaxa
https://www.readbyqxmd.com/read/29244871/inflammatory-monocytes-mediate-control-of-acute-alphavirus-infection-in-mice
#12
Kelsey C Haist, Kristina S Burrack, Bennett J Davenport, Thomas E Morrison
Chikungunya virus (CHIKV) and Ross River virus (RRV) are mosquito-transmitted alphaviruses that cause debilitating acute and chronic musculoskeletal disease. Monocytes are implicated in the pathogenesis of these infections; however, their specific roles are not well defined. To investigate the role of inflammatory Ly6ChiCCR2+ monocytes in alphavirus pathogenesis, we used CCR2-DTR transgenic mice, enabling depletion of these cells by administration of diptheria toxin (DT). DT-treated CCR2-DTR mice displayed more severe disease following CHIKV and RRV infection and had fewer Ly6Chi monocytes and NK cells in circulation and muscle tissue compared with DT-treated WT mice...
December 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29220517/determining-the-effectiveness-of-three-gene-pyramids-against-aphis-glycines-hemiptera-aphididae-biotypes
#13
A J Varenhorst, S R Pritchard, M E O'Neal, E W Hodgson, A K Singh
Since the discovery of Aphis glycines Matsumura (Hemiptera: Aphididae) in the United States, the primary management tactic has been foliar insecticides. Alternative management options such as host plant resistance to A. glycines have been developed and their effectiveness proved. However, the use of host plant resistance was complicated by the discovery of multiple, virulent biotypes of A. glycines in the United States that are capable of overcoming single Rag genes, Rag1 and Rag2, as well as a two-gene pyramid of Rag1+Rag2...
December 5, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29212195/the-adaptive-immune-system-promotes-initiation-of-prostate-carcinogenesis-in-a-human-c-myc-transgenic-mouse-model
#14
Monique H M Melis, Ekaterina Nevedomskaya, Johan van Burgsteden, Bianca Cioni, Hester J T van Zeeburg, Ji-Ying Song, John Zevenhoven, Lukas J A C Hawinkels, Karin E de Visser, Andries M Bergman
Increasing evidence from epidemiological and pathological studies suggests a role of the immune system in the initiation and progression of multiple cancers, including prostate cancer. Reports on the contribution of the adaptive immune system are contradictive, since both suppression and acceleration of disease development have been reported. This study addresses the functional role of lymphocytes in prostate cancer development using a genetically engineered mouse model (GEMM) of human c-Myc driven prostate cancer (Hi-Myc mice) combined with B and T cell deficiency (RAG1-/- mice)...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29208761/priming-of-innate-antimycobacterial-immunity-by-heat-killed-listeria-monocytogenes-induces-sterilizing-response-in-the-adult-zebrafish-tuberculosis-model
#15
Hanna Luukinen, Milka Marjut Hammarén, Leena-Maija Vanha-Aho, Aleksandra Svorjova, Laura Kantanen, Sampsa Järvinen, Bruno Vincent Luukinen, Eric Dufour, Mika Rämet, Vesa Pekka Hytönen, Mataleena Parikka
Mycobacterium tuberculosis remains one of the most problematic infectious agents due to its highly developed mechanisms to evade host immune responses combined with the increasing emergence of antibiotic resistance. Host-directed therapies aiming at optimal modulation of immune responses to improve bacterial eradication or to limit excessive inflammation are a new strategy for the treatment of tuberculosis. In this study, we have established a zebrafish-Mycobacterium marinum natural host-pathogen model system to study induced protective immune responses in mycobacterial infection...
November 30, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29176980/iragu-a-novel-inducible-and-reversible-mouse-model-for-ubiquitous-recombinase-activity
#16
Marie Bonnet, Leonor Morais Sarmento, Ana C Martins, Daniel Sobral, Joana Silva, Jocelyne Demengeot
Developing lymphocytes express the recombination activating genes (RAGs) 1 and 2 products that form a site specific recombinase complex (RAG), introducing double strand DNA breaks (DSBs) at recombination signal sequences (RSSs) flanking the V, D, and J gene segments in the antigen receptor loci. The subsequent steps in the reaction consist in the ligation of DSBs by ubiquitous enzymes of the non-homologous end joining DNA repair pathway. This mutagenesis process is responsible for the generation of the very large clonal diversity of T and B lymphocytes, itself allowing the recognition of a virtually open-ended antigenic universe...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29166410/devario-in-bangladesh-species-diversity-sibling-species-and-introgression-within-danionin-cyprinids-teleostei-cyprinidae-danioninae
#17
Sven O Kullander, Md Mizanur Rahman, Michael Norén, Abdur Rob Mollah
Four species of Devario are recorded from Bangladesh: D. aequipinnatus, D. anomalus, D. coxi, new species, and D. devario. Devario aequipinnatus has a wide distribution in northern India and Bangladesh. Devario coxi, from southeastern Bangladesh near Cox's Bazar, differs from D. aequipinnatus in mtDNA (COI, p-distance 1.8%), colouration, proportional measurements, and meristics. The minor morphological differences and low frequency of overlapping meristics suggest relatively recent separation of D. coxi from other D...
2017: PloS One
https://www.readbyqxmd.com/read/29156909/genetic-biomarkers-associated-with-response-to-palliative-radiotherapy-in-patients-with-painful-bone-metastases
#18
Anthony Furfari, Bo Angela Wan, Keyue Ding, Andrew Wong, Liting Zhu, Andrea Bezjak, Rebecca Wong, Carolyn F Wilson, Carlo DeAngelis, Azar Azad, Edward Chow, George S Charames
BACKGROUND: Palliative radiotherapy (RT) is effective in patients with painful bone metastases. Genetic factors may identify subgroup of patients who responded to RT. To identify DNA biomarkers associated with response to palliative RT. METHODS: Patients who received a single 8 Gy dose of RT for painful bone metastases were categorised into responders (n=36), non-responders (NR) (n=71). Saliva samples were sequenced to identify single-nucleotide variants (SNVs) in genes with known disease-causing variants from inflammation, radiation response, and DNA damage pathways...
October 10, 2017: Annals of Palliative Medicine
https://www.readbyqxmd.com/read/29135340/generation-and-testing-anti-influenza-human-monoclonal-antibodies-in-a-new-humanized-mouse-model-draga-hla-a2-hla-dr4-rag1-ko-il-2r%C3%AE-c-ko-nod
#19
Mirian Mendoza, Angela Ballesteros, Qiu Qi, Luis Pow Sang, Soumya Shashikumar, Sofia Casares, Teodor-D Brumeanu
Pandemic outbreaks of influenza type A viruses have resulted in numerous fatalities around the globe. Since the conventional influenza vaccines (CIV) provide less than 20% protection for individuals with weak immune system, it has been considered that broadly cross-neutralizing antibodies may provide a better protection. Herein, we showed that a recently generated humanized mouse (DRAGA mouse; HLA-A2. HLA-DR4. Rag1KO. IL-2Rγc KO. NOD) that lacks the murine immune system and expresses a functional human immune system can be used to generate cross-reactive, human anti-influenza monoclonal antibodies (hu-mAb)...
November 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29127409/frequency-of-human-cd45-target-cells-is-a-key-determinant-of-intravaginal-hiv-1-infection-in-humanized-mice
#20
Philip V Nguyen, Jocelyn M Wessels, Kristen Mueller, Fatemeh Vahedi, Varun Anipindi, Chris P Verschoor, Marianne Chew, Alexandre Deshiere, Uladzimir Karniychuk, Tony Mazzulli, Michel J Tremblay, Ali A Ashkar, Charu Kaushic
Approximately 40% of HIV-1 infections occur in the female genital tract (FGT), primarily through heterosexual transmission. FGT factors determining outcome of HIV-1 exposure are incompletely understood, limiting prevention strategies. Here, humanized NOD-Rag1(-/-) γc(-/-) mice differentially reconstituted with human CD34+ -enriched hematopoietic stem cells (Hu-mice), were used to assess target cell frequency and viral inoculation dose as determinants of HIV-1 infection following intravaginal (IVAG) challenge...
November 10, 2017: Scientific Reports
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