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https://www.readbyqxmd.com/read/29236386/characteristics-of-enzyme-linked-immunosorbent-assay-for-detection-of-igg-antibodies-specific-to-%C3%B0-hlamydia-trachomatis-heat-shock-protein-hsp-60
#1
O Yu Galkin, A B Besarab, T N Lutsenko
The goal of this work was to study sensitivity and specificity of the developed ELISA set for the identification of IgG antibodies against Chlamydia trachomatis HSP-60 (using biotinylated tyramine-based signal amplification system). The study was conducted using a panel of characterized sera, as well as two reference ELISA sets of similar purpose. According to the results of ELISA informative value parameters, the ELISA we have developed showed the highest specificity and sensitivity parameters (no false negative or false positive results were registered)...
January 2017: Ukrainian Biochemical Journal
https://www.readbyqxmd.com/read/29235978/rigid-amphipathic-fusion-inhibitors-demonstrate-antiviral-activity-against-african-swine-fever-virus
#2
Astghik Hakobyan, Inmaculada Galindo, Almudena Nañez, Erik Arabyan, Zaven Karalyan, Alexey A Chistov, Philipp P Streshnev, Vladimir A Korshun, Covadonga Alonso, Hovakim Zakaryan
Rigid amphipathic fusion inhibitors (RAFIs) are a family of nucleoside derivatives that inhibit the infectivity of several enveloped viruses by interacting with virion envelope lipids and inhibiting fusion between viral and cellular membranes. Here we tested the antiviral activity of two RAFIs, 5-(Perylen-3-ylethynyl)-arabino-uridine (aUY11) and 5-(Perylen-3-ylethynyl)uracil-1-acetic acid (cm1UY11) against African swine fever virus (ASFV), for which no effective vaccine is available. Both compounds displayed a potent, dose-dependent inhibitory effect on ASFV infection in Vero cells...
December 13, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29235977/proprotein-convertase-subtilisin-kexin-type-9-inhibits-hepatitis-c-virus-replication-through-interacting-with-ns5a
#3
Zhubing Li, Qiang Liu
Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a serine protease actively involved in regulating lipid homeostasis. Although PCSK9 has been shown to inhibit hepatitis C virus (HCV) entry and replication, the underlying mechanisms have not been thoroughly characterized. Moreover, whether PCSK9 regulates HCV translation and assembly/secretion has not been determined. We therefore further studied the effects of PCSK9 on the HCV life cycle. We showed that PCSK9 did not affect HCV translation or assembly/secretion...
December 13, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29235843/self-sterilizing-and-regeneratable-microchip-for-the-precise-capture-and-recovery-of-viable-circulating-tumor-cells-from-patients-with-cancer
#4
Lanlan Hui, Yi Su, Tingting Ye, Zhao Liu, Qingchang Tian, Chuanjiang He, Yueqi Zhao, Pu Chen, Xiaojia Wang, Weidong Han, Yan Luo, Ben Wang
Cancer cells metastasize and are transported in the bloodstream, easily reaching any site in the body through the blood circulation. A method designed to assess the number of circulating tumor cells (CTCs) should be validated as a clinical tool for predicting the response to therapy and monitoring disease progression in patients with cancer. Although CTCs are detectable in many cases, they remain unavailable for clinic usage due to their high testing cost, tedious operation and poor clinical relevance. Herein, we developed a regeneratable microchip for isolating CTCs that is available for robust cell heterogeneity assays on-site without the need for a sterile environment...
December 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29235283/-effect-of-proinflammatory-factors-tnf-%C3%AE-il-1%C3%AE-il-6-on-neuropathic-pain
#5
REVIEW
Qiu-Yue Li, Hai-Yu Xu, Hong-Jun Yang
Cytokines can be divided into two types: proinflammatory cytokines and anti-inflammatory cytokines. Proinflammatory cytokines are a kind of small molecular peptides synthesized and excreted by immune and non-immune cells, which can regulate a variety of physiological functions and play an important role in the process of trauma, pain and infection. Proinflammatory cytokines include TNF, IL-1, IL-6 and IL-8. More and more evidences suggest that proinflammatory cytokines(PICs), such as interleukin-1β(IL-1β), interleukin-6(IL-6) and tumor necrosis factor-α(TNF-α), are induced in the spinal cord(SC) and dorsal root ganglion (DRG) under various injury conditions, and contribute to pain hypersensitivity...
October 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29235266/host-genetic-variations-associated-with-disease-progression-in-chronic-hepatitis-c-virus-infection
#6
REVIEW
Kentaro Matsuura, Yasuhito Tanaka
Treatment with recently-developed interferon-free oral regimens combining direct-acting antiviral agents (DAAs) results in the elimination of hepatitis C virus (HCV) in almost all chronic hepatitis C (CHC) patients. In the era of DAAs, surveillance of hepatocellular carcinoma (HCC) after eradication of HCV by anti-HCV therapy is particularly important. As is well known, an advanced state of hepatic fibrosis is the major risk factor for developing HCC. Therefore, an increased understanding of various factors associated with disease progression and development of HCC in CHC patients is essential for implementing personalized treatment and surveillance of disease progression and HCC...
December 13, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29235260/functional-polymorphisms-of-innate-immunity-receptors-are-not-risk-factors-for-the-non-sbp-type-bacterial-infections-in-cirrhosis
#7
Tamas Dinya, Tamas Tornai, Zsuzsanna Vitalis, Istvan Tornai, Boglárka Balogh, David Tornai, Peter Antal-Szalmas, Andrea Sumegi, Hajnalka Andrikovics, Andras Bors, Attila Tordai, Maria Papp
BACKGROUND&AIMS: Pattern recognition receptors (PRRs) have a key role in the innate host defense. Functional polymorphisms of various PRRs have been established to contribute to an increased susceptibility to spontaneous bacterial peritonitis (SBP). Their role in the development of cirrhosis-associated bacterial infections (BI), beyond SBP or progressive disease course related to pathological bacterial translocation (BT) remains unknown. METHODS: 349 patients with cirrhosis were genotyped for common NOD2 (R702W, G908R and L1007PfsinsC), TLR2 (-16934T>A), and TLR4 (D299G) variants...
December 13, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29235226/reduced-therapeutic-effect-of-antiviral-drugs-in-patients-with-hepatitis-b-virus-reactivation-after-hematopoietic-stem-cell-transplantation
#8
Masamichi Kimura, Koji Nishikawa, Hisashi Sakamaki, Masashi Mizokami, Kiminori Kimura
BACKGROUND: Patients with resolved Hepatitis B virus (HBV) infection following hematopoietic stem cell transplantation (HSCT) are potentially at high risk of HBV reactivation. Although anti-viral drug therapy is recommended when HBV DNA reappears in the serum, drug efficacy after HBV reactivation remains unclear. METHODS: Host immune response against HBV was investigated via immunological analyses at 12 months after entecavir (ETV) treatment in six HSCT-treated and five non-HSCT-treated patients with HBV reactivation, and 18 patients with chronic hepatitis B (CHB)...
December 13, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29235197/superoxide-dismutase-from-helicobacter-pylori-suppresses-the-production-of-pro-inflammatory-cytokines-during-in-vivo-infection
#9
Andrew Stent, Alison L Every, Yok T Chionh, Garrett Z Ng, Philip Sutton
BACKGROUND: Helicobacter pylori has undergone considerable adaptation to allow chronic persistence within the gastric environment. While H. pylori-associated diseases are driven by an excessive inflammation, severe gastritis is detrimental to colonization by this pathogen. Hence, H. pylori has developed strategies to minimize the severity of gastritis it triggers in its host. Superoxide dismutase (SOD) is well known for its role in protecting against oxidative attack; less recognized is its ability to inhibit immunity, shown for SOD from mammalian sources and those of some bacterial species...
December 13, 2017: Helicobacter
https://www.readbyqxmd.com/read/29235156/ifn-%C3%AE-against-the-38-kda-antigen-of-mycobacterium-tuberculosis-discriminates-pulmonary-tuberculosis-from-infection-and-infection-from-exposure-evidence-from-a-study-of-human-population-in-a-high-endemic-setting
#10
Fekadu Abebe, Mulugeta Belay, Mengistu Legesse
Mycobacterium tuberculosis (Mtb) 38-kDa antigen is an immunogenic lipoprotein that induces strong T-cell responses in experimental animals. However, there is limited information on the role of this antigen in human population. In this article, we present the dynamics of pro-inflammatory (IFN-γ and TNF-α) and anti-inflammatory cytokine (IL-10) against the 38 kDa in cohorts of pulmonary TB (PTB) patients, household contacts (HHCs), and community controls (CCs) in a high endemic setting. Whole blood assay was used to determine the levels of cytokines in 149 patients, 149 HHCs, and 68 CCs at baseline, 6 months, and 12 months...
December 13, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29234642/ureaplasma-species-differentially-modulate-pro-and-anti-inflammatory-cytokine-responses-in-newborn-and-adult-human-monocytes-pushing-the-state-toward-pro-inflammation
#11
Kirsten Glaser, Christine Silwedel, Markus Fehrholz, Ana M Waaga-Gasser, Birgit Henrich, Heike Claus, Christian P Speer
Background:Ureaplasma species have been associated with chorioamnionitis and preterm birth and have been implicated in the pathogenesis of neonatal short and long-term morbidity. However, being mostly commensal bacteria, controversy remains on the pro-inflammatory capacity of Ureaplasma. Discussions are ongoing on the incidence and impact of prenatal, perinatal, and postnatal infection. The present study addressed the impact of Ureaplasma isolates on monocyte-driven inflammation. Methods: Cord blood monocytes of term neonates and adult monocytes, either native or LPS-primed, were cultured with Ureaplasma urealyticum (U...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29234410/scorpion-venom-active-polypeptide-may-be-a-new-external-drug-of-diabetic-ulcer
#12
Ting Wan, Luocheng Li, Zhanyong Zhu, Siyang Liu, Yueqiang Zhao, Mosheng Yu
Background: The epidermal growth factor (EGF) is recognized medicine of therapy in ulcer. However, its efficacy has been challenged. We compared scorpion venom active polypeptide and EGF of therapeutic effects in diabetic ulcer. Methods: The scorpion venom active polypeptide is made into gel. Fourteen diabetic SD rats were randomly divided into scorpion peptide gel group (SPG group) and EGF group. Before treatment, the rat model of diabetic ulcer was created. The levels of IL-1, IL-6, IL-8, and TNF-α in the wound tissue were measured at different time points during the treatment, secretions of wound were collected for bacterial culture, and the wound healing was recorded...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234365/ethnopharmacological-uses-phytochemistry-and-pharmacological-properties-of-croton-macrostachyus-hochst-ex-delile-a-comprehensive-review
#13
REVIEW
Alfred Maroyi
Croton macrostachyus is widely used as herbal medicine by the indigenous people of tropical Africa. The potential of C. macrostachyus as herbal medicine, the phytochemistry, and pharmacological properties of its parts used as herbal medicines are reviewed. The extensive literature survey revealed that C. macrostachyus is traditionally used to treat or manage at least 81 human and animal diseases and ailments. The species is used as herbal medicine for diseases and ailments such as abdominal pains, cancer, gastrointestinal disorders, malaria, pneumonia, sexually transmitted infections, skin infections, typhoid, and wounds and as ethnoveterinary medicine...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234320/increasing-the-clinical-potential-and-applications-of-anti-hiv-antibodies
#14
REVIEW
Casey K Hua, Margaret E Ackerman
Preclinical and early human clinical studies of broadly neutralizing antibodies (bNAbs) to prevent and treat HIV infection support the clinical utility and potential of bNAbs for prevention, postexposure prophylaxis, and treatment of acute and chronic infection. Observed and potential limitations of bNAbs from these recent studies include the selection of resistant viral populations, immunogenicity resulting in the development of antidrug (Ab) responses, and the potentially toxic elimination of reservoir cells in regeneration-limited tissues...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29234307/thymoquinone-inhibits-virulence-related-traits-of-cronobacter-sakazakii-atcc-29544-and-has-anti-biofilm-formation-potential
#15
Chao Shi, Chunhong Yan, Yue Sui, Yi Sun, Du Guo, Yifei Chen, Tong Jin, Xiaoli Peng, Linlin Ma, Xiaodong Xia
The aim of this study was to determine whether thymoquinone, the principal active ingredient in the volatile oil of Nigella sativa seeds, could suppress certain virulence traits of Cronobacter sakazakii ATCC 29544 which contribute to infection. Sub-inhibitory concentrations of thymoquinone significantly decreased motility, quorum sensing, and endotoxin production of C. sakazakii ATCC 29544 and biofilm formation of C. sakazakii 7-17. Thymoquinone substantially reduced the adhesion and invasion of C. sakazakii ATCC 29544 to HT-29 cells and decreased the number of intracellular bacterial cells within the RAW 264...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29234199/prevalence-and-characteristics-of-hepatitis-delta-virus-infection-in-a-tertiary-hospital-setting-in-cameroon
#16
Henry N Luma, Servais A F B Eloumou, Cécile Okalla, Olivier Donfack-Sontsa, Ruth Koumitana, Agnes Malongue, Georges B Nko'Ayissi, Dominique N Noah
Background/Aims: Hepatitis B virus (HBV) and hepatitis D virus (HDV) coinfection is associated with more severe liver disease than HBV alone. More knowledge on the epidemiology and clinical impact of HDV-infected individuals is needed in Cameroon.We aimed at determining the frequency of anti-HDV antibody testing in hepatitis B surface antigen (HBsAg) positive patients, the proportion of anti-HDV positivity, and the characteristics of anti-HDV positive compared to anti-HDV negative patients in a tertiary hospital setting in Cameroon...
December 2017: Journal of Clinical and Experimental Hepatology
https://www.readbyqxmd.com/read/29234123/dusp1-regulates-apoptosis-and-cell-migration-but-not-the-jip1-protected-cytokine-response-during-respiratory-syncytial-virus-and-sendai-virus-infection
#17
Alexa C Robitaille, Elise Caron, Nicolas Zucchini, Espérance Mukawera, Damien Adam, Mélissa K Mariani, Anaïs Gélinas, Audray Fortin, Emmanuelle Brochiero, Nathalie Grandvaux
The host antiviral response involves the induction of interferons and proinflammatory cytokines, but also the activation of cell death pathways, including apoptosis, to limit viral replication and spreading. This host defense is strictly regulated to eliminate the infection while limiting tissue damage that is associated with virus pathogenesis. Post-translational modifications, most notably phosphorylation, are key regulators of the antiviral defense implying an important role of protein phosphatases. Here, we investigated the role of the dual-specificity phosphatase 1 (DUSP1) in the host defense against human respiratory syncytial virus (RSV), a pathogenic virus of the Pneumoviridae family, and Sendai virus (SeV), a model virus being developed as a vector for anti-RSV vaccine...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29234060/heat-killed-lactobacillus-casei-confers-broad-protection-against-influenza-a-virus-primary-infection-and-develops-heterosubtypic-immunity-against-future-secondary-infection
#18
Yu-Jin Jung, Young-Tae Lee, Vu Le Ngo, Young-Hee Cho, Eun-Ju Ko, Sung-Moon Hong, Ki-Hye Kim, Ji-Hun Jang, Joon-Suk Oh, Min-Kyung Park, Cheol-Hyun Kim, Jun Sun, Sang-Moo Kang
Lactic acid bacteria (LAB) are the common probiotics. Here, we investigated the antiviral protective effects of heat-killed LAB strain Lactobacillus casei DK128 (DK128) on influenza viruses. Intranasal treatment of mice with DK128 conferred protection against different subtypes of influenza viruses by lessening weight loss and lowering viral loads. Protection via heat-killed DK128 was correlated with an increase in alveolar macrophage cells in the lungs and airways, early induction of virus specific antibodies, reduced levels of pro-inflammatory cytokines and innate immune cells...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29233822/hematopoietic-stem-cell-gene-therapy-for-ifn%C3%AE-r1-deficiency-protects-mice-from-mycobacterial-infections
#19
Miriam Hetzel, Adele Mucci, Patrick Blank, Ariane Hai Ha Nguyen, Jan Schiller, Olga Halle, Mark-Philipp Kühnel, Sandra Billig, Robert Meineke, Daniel Brand, Vanessa Herder, Wolfgang Baumgärtner, Franz-Christoph Bange, Ralph Goethe, Danny Jonigk, Reinhold Förster, Bernhard Gentner, Jean-Laurent Casaova, Jacinta Bustamante, Axel Schambach, Ulrich Kalinke, Nico Lachmann
Mendelian Susceptibility to Mycobacterial Disease (MSMD) is a rare primary immunodeficiency, characterized by severe infections caused by weakly virulent mycobacteria. Bi-allelic null mutations in genes encoding interferon gamma (IFNγ) receptor 1 or -2 (IFNGR1, IFNGR2) result in a life-threatening disease phenotype in early childhood. Recombinant IFNγ therapy is inefficient and hematopoietic stem cell transplantation (HSCT) has a poor prognosis. Thus, we developed a HSC gene therapy approach using lentiviral vectors expressing Ifnγr1 either constitutively or myeloid-specifically...
December 12, 2017: Blood
https://www.readbyqxmd.com/read/29233145/suppression-of-interleukin-6-increases-enterovirus-a71-lethality-in-mice
#20
Li-Chiu Wang, Hui-Wen Yao, Chuan-Fa Chang, Shainn-Wei Wang, Shih-Min Wang, Shun-Hua Chen
BACKGROUND: Enterovirus A71 (EV-A71) infection can induce fatal encephalitis in young children. Clinical reports show that interleukin-6 (IL-6) levels in the serum and cerebrospinal fluid of infected patients with brainstem encephalitis are significantly elevated. We used a murine model to address the significance of endogenous IL-6 in EV-A71 infection. RESULTS: EV-A71 infection transiently increased serum and brain IL-6 protein levels in mice. Most importantly, absence of IL-6 due to gene knockout or depletion of IL-6 using neutralizing monoclonal antibody enhanced the mortality and tissue viral load of infected mice...
December 12, 2017: Journal of Biomedical Science
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