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Helminths, immune

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https://www.readbyqxmd.com/read/27913566/th2-responses-are-primed-by-skin-dendritic-cells-with-distinct-transcriptional-profiles
#1
Lisa M Connor, Shiau-Choot Tang, Emmanuelle Cognard, Sotaro Ochiai, Kerry L Hilligan, Samuel I Old, Christophe Pellefigues, Ruby F White, Deepa Patel, Adam Alexander T Smith, David A Eccles, Olivier Lamiable, Melanie J McConnell, Franca Ronchese
The dendritic cell signals required for the in vivo priming of IL-4-producing T cells are unknown. We used RNA sequencing to characterize DCs from skin LN of mice exposed to two different Th2 stimuli: the helminth parasite Nippostrongylus brasiliensis (Nb) and the contact sensitizer dibutyl phthalate (DBP)-FITC. Both Nb and DBP-FITC induced extensive transcriptional changes that involved multiple DC subsets. Surprisingly, these transcriptional changes were highly distinct in the two models, with only a small number of genes being similarly regulated in both conditions...
December 2, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27912797/helminth-infections-and-gut-microbiota-a-feline-perspective
#2
Ana M Duarte, Timothy P Jenkins, Maria S Latrofa, Alessio Giannelli, Elias Papadopoulos, Luís Madeira de Carvalho, Matthew J Nolan, Domenico Otranto, Cinzia Cantacessi
BACKGROUND: Investigations of the relationships between the gut microbiota and gastrointestinal parasitic nematodes are attracting growing interest by the scientific community, driven by the need to better understand the contribution of parasite-associated changes in the composition of the gut flora to both host malnutrition and immune modulation. These studies have however been carried out mainly in humans and experimental animals, while knowledge of the make-up of the gut commensal flora in presence or absence of infection by parasitic nematodes in domestic animals is limited...
December 3, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27912316/th2-cells-in-health-and-disease
#3
Toshinori Nakayama, Kiyoshi Hirahara, Atsushi Onodera, Yusuke Endo, Hiroyuki Hosokawa, Kenta Shinoda, Damon J Tumes, Yoshitaka Okamoto
Helper T (Th) cell subsets direct immune responses by producing signature cytokines. Th2 cells produce IL-4, IL-5, and IL-13, which are important in humoral immunity and protection from helminth infection and are central to the pathogenesis of many allergic inflammatory diseases. Molecular analysis of Th2 cell differentiation and maintenance of function has led to recent discoveries that have refined our understanding of Th2 cell biology. Epigenetic regulation of Gata3 expression by chromatin remodeling complexes such as Polycomb and Trithorax is crucial for maintaining Th2 cell identity...
November 28, 2016: Annual Review of Immunology
https://www.readbyqxmd.com/read/27905107/co-operative-suppression-of-inflammatory-responses-in-human-dendritic-cells-by-plant-proanthocyanidins-and-products-from-the-parasitic-nematode-trichuris-suis
#4
Andrew R Williams, Elsenoor J Klaver, Lisa C Laan, Aina Ramsay, Christos Fryganas, Rolf Difborg, Helene Kringel, Jess D Reed, Irene Mueller-Harvey, Søren Skov, Irma van Die, Stig M Thamsborg
Interactions between dendritic cells (DCs) and environmental, dietary and pathogen antigens play a key role in immune homeostasis and regulation of inflammation. Dietary polyphenols such as proanthocyanidins (PAC) may reduce inflammation, and we therefore hypothesized that PAC may suppress lipopolysaccharide (LPS) -induced responses in human DCs and subsequent T helper type 1 (Th1) -type responses in naive T cells. Moreover, we proposed that, because DCs are likely to be exposed to multiple stimuli, the activity of PAC may synergise with other bioactive molecules that have anti-inflammatory activity, e...
November 7, 2016: Immunology
https://www.readbyqxmd.com/read/27900450/il-9-and-th9-in-parasite-immunity
#5
REVIEW
P Licona-Limón, A Arias-Rojas, E Olguín-Martínez
Interleukin-9 is a cytokine classically related to type 2 immune responses whose cellular identity has been recently reevaluated to identify a new specialized T helper subset called Th9 and an innate source referred as innate lymphoid cell type 2. Over the past years, IL-9 has been associated with allergic responses, tumor immunology, and autoimmunity; however, in this review, we will specifically focus on the role of IL-9 and Th9 cells in the context of parasitic infections. We will summarize and discuss all the evidence relating IL-9 expression and function in parasitic infections with a particular emphasis in helminth infections, an important health issue in developing countries; we will also provide a general description and classification of parasites, the immune response and cellular compartments activated in this context, and its implications and future directions towards a complete understanding of this interesting new T helper subset and its potential therapeutic use...
November 29, 2016: Seminars in Immunopathology
https://www.readbyqxmd.com/read/27893749/differential-protein-expression-in-the-hemolymph-of-bithynia-siamensis-goniomphalos-infected-with-opisthorchis-viverrini
#6
Kulwadee Suwannatrai, Apiporn Suwannatrai, Pairat Tabsripair, Jariya Umka Welbat, Sirikachorn Tangkawattana, Cinzia Cantacessi, Jason Mulvenna, Smarn Tesana, Alex Loukas, Javier Sotillo
Bithynia siamensis goniomphalos is a freshwater snail that serves as the first intermediate host of the human liver fluke Opisthorchis viverrini. This parasite is a major public health problem in different countries throughout the Greater Mekong sub-region (Thailand, southern Vietnam, Lao PDR and Cambodia). Chronic O. viverrini infection also results in a gradual increase of fibrotic tissues in the biliary tract that are associated with hepatobiliary diseases and contribute to cholangiocarcinoma (a fatal type of bile duct cancer)...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27884436/distribution-of-foxp3-t-cells-in-the-liver-and-hepatic-lymph-nodes-of-goats-and-sheep-experimentally-infected-with-fasciola-hepatica
#7
A Escamilla, R Zafra, J Pérez, T N McNeilly, I L Pacheco, L Buffoni, F J Martínez-Moreno, V Molina-Hernández, A Martínez-Moreno
Foxp3 regulatory T cells (Tregs) are now considered to play a key role in modulation of immune responses during parasitic helminth infections. Immunomodulation is a key factor in Fasciola hepatica infection; however, the distribution and role of Foxp3(+) Tregs cells have not been investigated in F. hepatica infected ruminants. The aim of this study was to evaluate the presence of Foxp3(+) Tregs in the liver and hepatic lymph nodes from experimentally infected sheep and goats during acute and chronic stages of infection...
October 30, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27883079/a-parasite-derived-68-mer-peptide-ameliorates-autoimmune-disease-in-murine-models-of-type-1-diabetes-and-multiple-sclerosis
#8
Maria E Lund, Judith Greer, Aakanksha Dixit, Raquel Alvarado, Padraig McCauley-Winter, Joyce To, Akane Tanaka, Andrew T Hutchinson, Mark W Robinson, Ann M Simpson, Bronwyn A O'Brien, John P Dalton, Sheila Donnelly
Helminth parasites secrete molecules that potently modulate the immune responses of their hosts and, therefore, have potential for the treatment of immune-mediated human diseases. FhHDM-1, a 68-mer peptide secreted by the helminth parasite Fasciola hepatica, ameliorated disease in two different murine models of autoimmunity, type 1 diabetes and relapsing-remitting immune-mediated demyelination. Unexpectedly, FhHDM-1 treatment did not affect the proliferation of auto-antigen specific T cells or their production of cytokines...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27882304/metabolic-and-adaptive-immune-responses-induced-in-mice-infected-with-tissue-dwelling-nematode-trichinella-zimbabwensis
#9
N Onkoba, M J Chimbari, J M Kamau, S Mukaratirwa
Tissue-dwelling helminths are known to induce intestinal and systemic inflammation accompanied with host compensatory mechanisms to counter balance nutritional and metabolic deficiencies. The metabolic and immune responses of the host depend on parasite species and tissues affected by the parasite. This study investigated metabolic and immuno-inflammatory responses of mice infected with tissue-dwelling larvae of Trichinella zimbabwensis and explored the relationship between infection, metabolic parameters and Th1/Th17 immune responses...
2016: Open veterinary journal
https://www.readbyqxmd.com/read/27882241/immune-profile-of-honduran-schoolchildren-with-intestinal-parasites-the-skewed-response-against-geohelminths
#10
José Antonio Gabrie, María Mercedes Rueda, Carol Anahelka Rodríguez, Maritza Canales, Ana Lourdes Sanchez
Soil-transmitted helminth infections typically induce a type-2 immune response (Th2), but no immunoepidemiological studies have been undertaken in Honduras, an endemic country where the main control strategy is children's annual deworming. We aimed to characterize the immune profile of Honduran schoolchildren harbouring these parasitoses. Demographic and epidemiological data were obtained through a survey; nutritional status was assessed through anthropometry; intestinal parasites were diagnosed by formol-ether and Kato-Katz; and blood samples were collected to determine immunological markers including Th1/Th2 cytokines, IgE, and eosinophil levels...
2016: Journal of Parasitology Research
https://www.readbyqxmd.com/read/27876981/detection-of-fasciola-hepatica-and-fasciola-gigantica-common-and-uncommon-antigens-using-rabbit-hyper-immune-serum-raised-against-their-excretory-secretory-and-somatic-antigens
#11
S Abdolahi Khabisi, B Sarkari
Fasciolosis is an important neglected helminth disease caused by two liver flukes, Fasciola hepatica and Fasciola gigantica. The two species of Fasciola are usually different in their morphological and molecular features. They have also common and uncommon antigens in both their somatic and excretory secretory metabolites. In this study, we compared somatic and excretory-secretory (ES) antigens of F. hepatica and F. gigantica, by using rabbit hyper immune serum raised against these antigens. Adult worms were collected from bile ducts of infected animals and species of the fluke was confirmed by RFLP-PCR...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27871775/recombinant-proteins-of-helminths-with-immunoregulatory-properties-and-their-possible-therapeutic-use
#12
REVIEW
Leonardo Nascimento Santos, Luis Gustavo Carvalho Pacheco, Carina Silva Pinheiro, Neuza Maria Alcantara-Neves
The inverse relationship between helminth infections and the development of immune-mediated diseases is a cornerstone of the hygiene hypothesis and studies were carried out to elucidate the mechanisms by which helminth-derived molecules can suppress immunological disorders. These studies have fostered the idea that parasitic worms may be used as a promising therapeutic alternative for prevention and treatment of immune-mediated diseases. We discuss the current approaches for identification of helminth proteins with potential immunoregulatory properties, including the strategies based on high-throughput technologies...
November 18, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27870858/first-report-of-the-occurrence-of-trichinella-specific-antibodies-in-domestic-pigs-in-central-and-eastern-uganda
#13
Kristina Roesel, Karsten Nöckler, Maximilian P O Baumann, Reinhard Fries, Michel M Dione, Peter-Henning Clausen, Delia Grace
Previous research on trichinellosis in Africa focused on isolating Trichinella from wildlife while the role of domestic pigs has remained highly under-researched. Pig keeping in Uganda is historically recent, and evidence on zoonotic pig diseases, including infection with Trichinella species, is scarce. A cross-sectional survey on Trichinella seroprevalence in pigs was conducted in three districts in Central and Eastern Uganda from April 2013 to January 2015. Serum from a random sample of 1125 pigs from 22 villages in Eastern and Central Uganda was examined to detect immunoglobulin G (IgG) against any Trichinella spp...
2016: PloS One
https://www.readbyqxmd.com/read/27866265/proteomic-analysis-of-fasciola-hepatica-excretory-and-secretory-products-fhesps-involved-in-interacting-with-host-pbmcs-and-cytokines-by-shotgun-lc-ms-ms
#14
Qing Liu, Si-Yang Huang, Dong-Mei Yue, Jin-Lei Wang, Yujian Wang, Xiangrui Li, Xing-Quan Zhu
Fasciola hepatica is a helminth parasite with a worldwide distribution, which can cause chronic liver disease, fasciolosis, leading to economic losses in the livestock and public health in many countries. Control is mostly reliant on the use of drugs, and as a result, drug resistance has now emerged. The identification of F. hepatica genes involved in interaction between the parasite and host immune system is utmost important to elucidate the evasion mechanisms of the parasite and develop more effective strategies against fasciolosis...
November 19, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27863931/the-multibiome-the-intestinal-ecosystem-s-influence-on-immune-homeostasis-health-and-disease
#15
REVIEW
Heather A Filyk, Lisa C Osborne
Mammalian evolution has occurred in the presence of mutualistic, commensal, and pathogenic micro- and macro-organisms for millennia. The presence of these organisms during mammalian evolution has allowed for intimate crosstalk between these colonizing species and the host immune system. In this review, we introduce the concept of the 'multibiome' to holistically refer to the biodiverse collection of bacteria, viruses, fungi and multicellular helminthic worms colonizing the mammalian intestine. Furthermore, we discuss new insights into multibiome-host interactions in the context of host-protective immunity and immune-mediated diseases, including inflammatory bowel disease and multiple sclerosis...
October 6, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27862000/immunomodulation-by-helminths-similar-impact-on-type-1-and-type-2-diabetes
#16
Jayagopi Surendar, Karunakaran Indulekha, Achim Hoerauf, Marc P Hübner
The incidence of both type 1 (T1D) and type 2 diabetes (T2D) is drastically increasing and it is predicted that the global prevalence of diabetes will reach almost 600 million cases by 2035. Even though the pathogenesis of both types of diabetes is distinct, the immune system is actively involved in both forms of the disease. Genetic and environmental factors determine the risk to develop T1D. On the other hand, sedentary life style, surplus of food intake and other lifestyle changes contribute to the increase of T2D incidence...
November 10, 2016: Parasite Immunology
https://www.readbyqxmd.com/read/27861815/intestinal-helminth-infection-induces-highly-functional-resident-memory-cd4-t-cells-in-mice
#17
Svenja Steinfelder, Sebastian Rausch, Dörte Michael, Anja A Kühl, Susanne Hartmann
Immunity to intestinal nematodes requires CD4⁺ Th2-cell responses, including IL-4 and IL-13 production. Chronic infection with intestinal nematodes leads to downregulation of these responses, and few functional T helper (Th) 2 cells are detected in secondary lymphoid organs in the chronic phase or after abrogation of infection. Here, we show with a natural murine infection with Heligmosomoides polygyrus that highly functional memory Th2 cells persist in the lamina propria and in addition in the peritoneal cavity (PC) after abrogation of infection...
November 10, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27842570/nitric-oxide-and-cytokine-production-by-glial-cells-exposed-in-vitro-to-neuropathogenic-schistosome-trichobilharzia-regenti
#18
Tomáš Macháček, Lucie Panská, Hana Dvořáková, Petr Horák
BACKGROUND: Helminth neuroinfections represent a serious health problem, but host immune mechanisms in the nervous tissue often remain undiscovered. This study aims at in vitro characterization of the response of murine astrocytes and microglia exposed to Trichobilharzia regenti which is a neuropathogenic schistosome migrating through the central nervous system of vertebrate hosts. Trichobilharzia regenti infects birds and mammals in which it may cause severe neuromotor impairment. This study was focused on astrocytes and microglia as these are immunocompetent cells of the nervous tissue and their activation was recently observed in T...
November 14, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27836928/the-common-mouse-protozoa-tritrichomonas-muris-alters-mucosal-t-cell-homeostasis-and-colitis-susceptibility
#19
Nichole K Escalante, Paul Lemire, Mayra Cruz Tleugabulova, David Prescott, Arthur Mortha, Catherine J Streutker, Stephen E Girardin, Dana J Philpott, Thierry Mallevaey
The mammalian gastrointestinal tract hosts a diverse community of microbes including bacteria, fungi, protozoa, helminths, and viruses. Through coevolution, mammals and these microbes have developed a symbiosis that is sustained through the host's continuous sensing of microbial factors and the generation of a tolerant or pro-inflammatory response. While analyzing T cell-driven colitis in nonlittermate mouse strains, we serendipitously identified that a nongenetic transmissible factor dramatically increased disease susceptibility...
November 11, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27827438/changes-in-duodenal-tissue-associated-microbiota-following-hookworm-infection-and-consecutive-gluten-challenges-in-humans-with-coeliac-disease
#20
Paul Giacomin, Martha Zakrzewski, Timothy P Jenkins, Xiaopei Su, Rafid Al-Hallaf, John Croese, Stefan de Vries, Andrew Grant, Makedonka Mitreva, Alex Loukas, Lutz Krause, Cinzia Cantacessi
A reduced diversity of the gastrointestinal commensal microbiota is associated with the development of several inflammatory diseases. Recent reports in humans and animal models have demonstrated the beneficial therapeutic effects of infections by parasitic worms (helminths) in some inflammatory disorders, such as inflammatory bowel disease (IBD) and coeliac disease (CeD). Interestingly, these studies have described how helminths may alter the intestinal microbiota, potentially representing a mechanism by which they regulate inflammation...
November 9, 2016: Scientific Reports
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