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İnfection immunology

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https://www.readbyqxmd.com/read/27933277/lectins-from-synadenium-carinatum-scll-and-artocarpus-heterophyllus-artinm-are-able-to-induce-beneficial-immunomodulatory-effects-in-a-murine-model-for-treatment-of-toxoplasma-gondii-infection
#1
Eliézer L P Ramos, Silas S Santana, Murilo V Silva, Fernanda M Santiago, Tiago W P Mineo, José R Mineo
Infection by Toxoplasma gondii affects around one-third of world population and the treatment for patients presenting toxoplasmosis clinically manifested disease is mainly based by a combination of sulfadiazine, pyrimethamine, and folinic acid. However, this therapeutic protocol is significantly toxic, causing relevant dose-related bone marrow damage. Thus, it is necessary to improve new approaches to investigate the usefulness of more effective and non-toxic agents for treatment of patients with toxoplasmosis...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27933174/a-case-of-hepatitis-c-associated-osteosclerosis-accelerated-bone-turnover-controlled-by-pulse-steroid-therapy
#2
Nobuhiro Miyamura, Shuhei Nishida, Mina Itasaka, Hirofumi Matsuda, Takeshi Ohtou, Yasuhiro Yamaguchi, Daisuke Inaba, Sadahiro Tamiya, Tetsuo Nakano
: Hepatitis C-associated osteosclerosis (HCAO), a very rare disorder in which an extremely rapid bone turnover occurs and results in osteosclerosis, was acknowledged in 1990s as a new clinical entity with the unique bone disorder and definite link to chronic type C hepatitis, although the pathogenesis still remains unknown. Affected patients suffer from excruciating deep bone pains. We report the 19th case of HCAO with diagnosis confirmed by bone biopsy, and treated initially with a bisphosphonate, next with corticosteroids and finally with direct acting antivirals (DAA: sofosbuvir and ribavirin) for HCV infection...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27932612/legionella-longbeachae-is-immunologically-silent-and-highly-virulent-in-vivo
#3
Liliana M Massis, Mariana A Assis-Marques, Fernanda V S Castanheira, Yasmin J Capobianco, Andiamira C Balestra, Pedro Escoll, Rebecca E Wood, Graziele Z Manin, Vani M A Correa, José C Alves-Filho, Fernando Q Cunha, Carmen Buchrieser, Marcos C Borges, Hayley J Newton, Dario S Zamboni
BACKGROUND: Legionella longbeachae (Llo) and Legionella pneumophila (Lpn) are the most common pneumonia-causing agents of the genus. Although both species can be lethal to humans and are highly prevalent, little is known about the molecular pathogenesis of Llo infections. In murine models of infection, Lpn infection is self-limited whereas Llo infection is lethal. DESIGN/METHODS: We used mouse macrophages, human macrophages, human epithelial cells and mouse infections in vivo to evaluate multiple parameters of the infection...
December 8, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27932339/predictors-of-treatment-failure-on-second-line-antiretroviral-therapy-among-adults-in-northwest-ethiopia-a-multicentre-retrospective-follow-up-study
#4
Adino Tesfahun Tsegaye, Mamo Wubshet, Tadesse Awoke, Kefyalew Addis Alene
BACKGROUND: The number of patients using second-line antiretroviral therapy (ART) has increased over time. In Ethiopia, 1.5% of HIV infected patients on ART are using a second-line regimen and little is known about its effect in this setting. OBJECTIVE: To estimate the rate and predictors of treatment failure on second-line ART among adults living with HIV in northwest Ethiopia. SETTING: An institution-based retrospective follow-up study was conducted at three tertiary hospitals in northwest Ethiopia from March to May 2015...
December 8, 2016: BMJ Open
https://www.readbyqxmd.com/read/27931829/primary-immunodeficiencies-associated-with-ebv-induced-lymphoproliferative-disorders
#5
REVIEW
Mahsima Shabani, Kim E Nichols, Nima Rezaei
Primary immunodeficiency diseases (PIDs) are a subgroup of inherited immunological disorders that increase susceptibility to viral infections. Among the range of viral pathogens involved, EBV remains a major threat because of its high prevalence of infection among the adult population and its tendency to progress to life-threatening lymphoproliferative disorders (LPDs) and/or malignancy. The high mortality in immunodeficient patients with EBV-driven LPDs, despite institution of diverse and often intensive treatments, prompts the need to better study these PIDs to identify and understand the affected molecular pathways that increase susceptibility to EBV infection and progression...
December 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27931590/cytotoxic-t-lymphocyte-associated-protein-4-acts-on-local-draining-lymph-nodes-in-the-allogeneic-abdominal-skin-flap-of-a-rat-model-to-extend-its-survival
#6
G Ma, J Pei, Y Li, Y Han, D Liu
BACKGROUND: Early acute allograft rejection is the result of immune cells mainly composed of thymocyte (T) cells, which are activated, mature, and differentiate in lymphoid tissue. METHODS: Cytotoxic T lymphocyte-associated protein 4 immunoglobulin (CTLA4-Ig) competitively suppresses the cluster of differentiation 28/CTLA4-B7 costimulatory signaling pathway and alters the ratio of T helper 1 to T helper 2, leading to the inhibition of T cell activation. RESULTS: We used lentivirus-packed CTLA4-Ig to infect the local draining lymph nodes of the allograft skin flap in a rat model, which effectively extended the survival of the allograft...
December 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931054/-tb-screening-of-pregnant-women-in-accordance-with-the-german-protection-against-infection-act
#7
(no author information available yet)
Pregnant women should be tested with immune tests for tuberculosis when they undergo TB screening according to the German Infectious Diseases Protection Act. Interferon Gamma Release Assays (IGRAs) should be the priority tests used for pregnant refugees and asylum seekers, especially when migrating from high incidence countries (> 20 cases/100.000 population according to the ECDC) or when they fled from crisis regions; positive tuberculin skin tests should be veryfied with IGRA. Once immunological tests are suggesting a latent tuberculosis infection it should be considered that pregnant women have an increased risk of developing active tuberculosis with potential health threats for the unborn child...
December 2016: Pneumologie
https://www.readbyqxmd.com/read/27930753/immune-response-to-hpv16-e6-and-e7-proteins-and-patient-outcomes-in-head-and-neck-cancer
#8
Heather H Nelson, Michael Pawlita, Dominique S Michaud, Michael McClean, Scott M Langevin, Melissa N Eliot, Karl T Kelsey
Importance: Pathology-based measures of human papillomavirus (HPV) status are routinely obtained in the care of head and neck cancer and are clearly associated with patient outcome for cancers of the oropharynx. However, it is unclear if HPV status is of high value for cancers of the larynx and oral cavity. In addition, it is possible to assess HPV infection using serology-based methods; however, the suitability of this pathology-independent measure for predicting patient outcome in head and neck cancer is unknown...
December 8, 2016: JAMA Oncology
https://www.readbyqxmd.com/read/27930337/genetic-immunological-and-clinical-features-of-patients-with-bacterial-and-fungal-infections-due-to-inherited-il-17ra-deficiency
#9
Romain Lévy, Satoshi Okada, Vivien Béziat, Kunihiko Moriya, Caini Liu, Louis Yi Ann Chai, Mélanie Migaud, Fabian Hauck, Amein Al Ali, Cyril Cyrus, Chittibabu Vatte, Turkan Patiroglu, Ekrem Unal, Marie Ferneiny, Nobuyuki Hyakuna, Serdar Nepesov, Matias Oleastro, Aydan Ikinciogullari, Figen Dogu, Takaki Asano, Osamu Ohara, Ling Yun, Erika Della Mina, Didier Bronnimann, Yuval Itan, Florian Gothe, Jacinta Bustamante, Stéphanie Boisson-Dupuis, Natalia Tahuil, Caner Aytekin, Aicha Salhi, Saleh Al Muhsen, Masao Kobayashi, Julie Toubiana, Laurent Abel, Xiaoxia Li, Yildiz Camcioglu, Fatih Celmeli, Christoph Klein, Suzan A AlKhater, Jean-Laurent Casanova, Anne Puel
Chronic mucocutaneous candidiasis (CMC) is defined as recurrent or persistent infection of the skin, nails, and/or mucosae with commensal Candida species. The first genetic etiology of isolated CMC-autosomal recessive (AR) IL-17 receptor A (IL-17RA) deficiency-was reported in 2011, in a single patient. We report here 21 patients with complete AR IL-17RA deficiency, including this first patient. Each patient is homozygous for 1 of 12 different IL-17RA alleles, 8 of which create a premature stop codon upstream from the transmembrane domain and have been predicted and/or shown to prevent expression of the receptor on the surface of circulating leukocytes and dermal fibroblasts...
December 7, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27929742/why-when-and-for-what-diseases-pregnant-and-new-mothers-should-be-vaccinated
#10
Giovanni Gabutti, Giorgio Conforti, Alberto Tomasi, Parvanè Kuhdari, Paolo Castiglia, Rosa Prato, Silvia Memmini, Chiara Azzari, Giovanni Vitali Rosati, Paolo Bonanni
Immunological and serological changes that occur during pregnancy can alter the susceptibility of both the mother and the fetus against various infectious diseases. The pregnant woman has an altered immune response and, for some pathologies, is at increased risk of infection and of developing complications and serious outcomes. In addition, maternal infections can result in congenital anomalies, malformations or severe neonatal diseases. Vaccination of pregnant women can therefore have a double goal: to protect the mother from diseases that could have an impact on her health and to avoid infection/disease transmission to the fetus or the newborn...
December 8, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27928019/tlr2-ligation-enhances-hiv-1-replication-in-activated-ccr6-cd4-t-cells-by-increasing-virus-entry-and-establishing-a-more-permissive-environment-to-infection
#11
Jean-François Bolduc, Michel Ouellet, Laurent Hany, Michel J Tremblay
: In this study, we investigated the effect of TLR2 ligation on the permissiveness of activated CD4(+) T cells to HIV-1 infection by focusing our experiments on the relative susceptibility of cell subsets based on their expression of CCR6. Purified primary human CD4(+) T cells were first subjected to a CD3/CD28 costimulation before treatment with the TLR2 agonist Pam3CSK4. Finally, cells were inoculated with R5-tropic HIV-1 particles that permit to study the effect of TLR2 triggering on virus production at both population and single-cell levels...
December 7, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27928007/mice-expressing-minimally-humanized-cd81-and-occludin-genes-support-hepatitis-c-virus-uptake-in-vivo
#12
Qiang Ding, Markus von Schaewen, Gabriela Hrebikova, Brigitte Heller, Lisa Sandmann, Mario Plaas, Alexander Ploss
Hepatitis C virus (HCV) causes chronic infections in at least 150 million individuals world-wide. HCV has a narrow host range and robustly infects only humans and chimpanzees. The underlying mechanisms for this narrow host range are incompletely understood. At the level of entry differences in the amino acid sequences between the human and mouse orthologues of two essential host factors, the tetraspannin CD81 and the tight junction protein occludin (OCLN) explain at least in part HCV's limited ability to enter mouse hepatocytes...
December 7, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27926861/immunometabolic-pathways-in-bcg-induced-trained-immunity
#13
Rob J W Arts, Agostinho Carvalho, Claudia La Rocca, Carla Palma, Fernando Rodrigues, Ricardo Silvestre, Johanneke Kleinnijenhuis, Ekta Lachmandas, Luís G Gonçalves, Ana Belinha, Cristina Cunha, Marije Oosting, Leo A B Joosten, Giuseppe Matarese, Reinout van Crevel, Mihai G Netea
The protective effects of the tuberculosis vaccine Bacillus Calmette-Guerin (BCG) on unrelated infections are thought to be mediated by long-term metabolic changes and chromatin remodeling through histone modifications in innate immune cells such as monocytes, a process termed trained immunity. Here, we show that BCG induction of trained immunity in monocytes is accompanied by a strong increase in glycolysis and, to a lesser extent, glutamine metabolism, both in an in-vitro model and after vaccination of mice and humans...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27925503/persistence-of-protective-anti-hbs-antibody-levels-and-anamnestic-response-to-hbv-booster-vaccination-a-cross-sectional-study-among-healthcare-students-20%C3%A2-years-following-the-universal-immunization-campaign-in-italy
#14
Guglielmo Dini, Alessandra Toletone, Ilaria Barberis, Nicoletta Debarbieri, Emanuela Massa, Chiara Paganino, Francesca Bersi, Alfredo Montecucco, Cristiano Alicino, Paolo Durando
Vaccination against Hepatitis B Virus (HBV) became mandatory in Italy for all newborns and twelve years-old individuals in the 1991. The immunogenicity of HBV vaccine and the effectiveness of the universal immunization strategy have been widely demonstrated. However the need to assess the antibody concentrations above the well known serological correlate of protection for HBV infection (≥ 10 mIU/mL), established in individuals immunized with a three doses vaccination course, is still recommended in subjects exposed to occupational risks in different settings, particularly the healthcare services...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27925389/the-long-term-immunological-effects-of-alloferon-and-its-analogues-in-the-mealworm-tenebrio-molitor
#15
Elżbieta Czarniewska, Arkadiusz Urbański, Szymon Chowański, Mariola Kuczer
The subject of this paper is a search for the long-term immunological effects of alloferon and 3 structural analogues of alloferon, which were earlier characterised by the highest pro-apoptotic activity in Tenebrio molitor. The differences in the actions of these peptides on immune response were observed. Alloferon increased nodulation and significantly phenoloxidase activity in the haemolymph of experimentally infected T. molitor. However, [Phe(p-NH2 )(1) ]- and [Phe(p-OMe)(1) ]-alloferon strongly inhibited cellular and humoral defense of the mealworm against Staphylococcus aureus infection...
December 7, 2016: Insect Science
https://www.readbyqxmd.com/read/27925194/sv40-infection-of-mesenchymal-stromal-cells-from-wharton-s-jelly-drives-the-production-of-inflammatory-and-tumoral-mediators
#16
Carolina Cason, Giuseppina Campisciano, Nunzia Zanotta, Erica Valencic, Serena Delbue, Ramona Bella, Manola Comar
The Mesenchymal Stromal Cells from umbilical cord Wharton's jelly (WJSCs) are a source of cells with high potentiality for the treatment of human immunological disorders. Footprints of the oncogenic viruses Simian Virus 40 (SV40) and JC Virus (JCPyV) have been recently detected in human WJSCs specimens. The aim of this study is to evaluate if WJSCs can be efficiently infected by these Polyomaviruses and if they can potentially exert tumoral activity. Cell culture experiments indicated that WJSCs could sustain both SV40 and JCPyV infections...
December 7, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27924822/il-21-dependent-expansion-of-memory-like-nk-cells-enhances-protective-immune-responses-against-mycobacterium-tuberculosis
#17
S Venkatasubramanian, S Cheekatla, P Paidipally, D Tripathi, E Welch, A R Tvinnereim, R Nurieva, R Vankayalapati
Natural killer (NK) cells are traditionally considered as innate cells, but recent studies suggest that NK cells can distinguish antigens, and that memory NK cells expand and protect against viral pathogens. Limited information is available about the mechanisms involved in memory-like NK cell expansion, and their role in bacterial infections and vaccine-induced protective immune responses. In the current study, using a mouse model of tuberculosis (TB) infection, we found that interferon-gamma producing CD3-NKp46+CD27+KLRG1+ memory-like NK cells develop during Bacille Calmette-Guérin vaccination, expand, and provide protection against challenge with Mycobacterium tuberculosis (M...
December 7, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27924821/critical-role-of-tslp-responsive-mucosal-dendritic-cells-in-the-induction-of-nasal-antigen-specific-iga-response
#18
S Joo, Y Fukuyama, E J Park, Y Yuki, Y Kurashima, R Ouchida, S F Ziegler, H Kiyono
Thymic stromal lymphopoietin (TSLP) is an interleukin-7 (IL-7)-like cytokine involved in T helper 2 type immune responses. The primary target of TSLP is myeloid dendritic cells (DCs), however, little is known about the mechanism by which TSLP elicits respiratory IgA immune responses upon mucosal immunization. Here, we found that the levels of TSLP and TSLPR were upregulated in the mucosal DCs of mice nasally immunized with pneumococcal surface protein A (PspA) plus cholera toxin (CT) compared with those immunized with PspA alone...
December 7, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27919756/molecular-identification-and-functional-delineation-of-a-glutathione-reductase-homologue-from-disk-abalone-haliotis-discus-discus-insights-as-a-potent-player-in-host-antioxidant-defense
#19
H M L P B Herath, P D S U Wickramasinghe, S D N K Bathige, R G P T Jayasooriya, Gi-Young Kim, Myoung Ae Park, Chul Kim, Jehee Lee
Glutathione reductase (GSR) is an enzyme that catalyzes the biochemical conversion of oxidized glutathione (GSSG) into the reduced form (GSH). Since the ratio between the two forms of glutathione (GSH/GSSG) is important for the optimal function of GSH to act as an antioxidant against H2O2, the contribution of GSR as an enzymatic regulatory agent to maintain the proper ratio is essential. Abalones are marine mollusks that frequently encounter environmental factors that can trigger the overproduction of reactive oxygen species (ROS) such as H2O2...
December 2, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27919492/corrigendum-to-immunologic-mechanisms-of-fingolimod-and-the-role-of-immunosenescence-in-the-risk-of-cryptococcal-infection-a-case-report-and-review-of-literature-mult-scler-relat-disord-9-2016-158-162
#20
Elena Grebenciucova, Anthony T Reder, Jacqueline T Bernard
No abstract text is available yet for this article.
November 2016: Multiple Sclerosis and related Disorders
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