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https://www.readbyqxmd.com/read/29782983/an-in-vivo-biocompatibility-study-of-surgical-meshes-made-from-bacterial-cellulose-modified-with-chitosan
#1
Joanna Piasecka-Zelga, Piotr Zelga, Joanna Szulc, Justyna Wietecha, Danuta Ciechańska
Bacterial cellulose modified with chitosan (MBC) is an innovative biomaterial used in regenerative medicine which may potentially improve treatment outcomes mesh for hernia repair surgery by facilitating better absorption in native tissue with less risk of mesh-related infections. The aim of the present study was to evaluate the biocompatibility of mesh based on MBC, and determine whether immunological reactions occur due to hypersensitivity to the implants. Forty five Imp:WIST rats were randomly assigned to be implanted with one of three mesh types: simple polypropylene mesh (n = 15), mesh modified by bacterial cellulose only (n = 15) and MBC mesh (n = 15) and evaluated after one and three months following intramuscular implantation...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782179/early-intravascular-events-are-associated-with-development-of-ards
#2
Raja-Elie E Abdulnour, Tina Gunderson, Ioanna Barkas, Jack Y Timmons, Cindy Barnig, Michelle Gong, Daryl J Kor, Ognjen Gajic, Daniel Talmor, Rickey E Carter, Bruce D Levy
RATIONALE: The acute respiratory distress syndrome (ARDS) is a devastating illness with limited therapeutic options. A better understanding of early biochemical and immunological events in ARDS could inform the development of new preventive and treatment strategies. OBJECTIVE: To determine select peripheral blood lipid mediator and leukocyte responses in patients at-risk for ARDS. METHODS: Patients at risk for ARDS were randomized as part of a multicenter, double-blind clinical trial of aspirin versus placebo (LIPS-A; NCT01504867)...
May 21, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29777872/inventory-of-proteoforms-as-a-current-challenge-of-proteomics-some-technical-aspects
#3
Stanislav Naryzhny
The main intricacy in the human proteome is that it is tremendously complex and composed from diverse and heterogeneous gene products. These products are called protein species or proteoforms and are the smallest units of the proteome. In pursuit of the comprehensive profiling of the human proteome, significant advances in the technology of so called "Top-Down" mass spectrometry based proteomics, have been made. However, the scale of performance of this approach is still far behind the "Bottom-Up", peptide-centric techniques...
May 16, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29776612/immunohistochemical-investigation-of-the-cross-reactivity-of-selected-cell-markers-in-formalin-fixed-paraffin-embedded-lymphoid-tissues-of-franciscana-pontoporia-blainvillei
#4
J Díaz-Delgado, R Ressio, K R Groch, J L Catão-Dias
A considerable amount of knowledge on natural and anthropogenic pathologic conditions affecting different cetacean species has been gained over the last decades. Nonetheless, the immunopathological bases for most of these processes have been poorly documented or remain unknown. Comparative immunopathological investigations in these species are precluded by the limited number of specific antibodies, most of which are not commercially available, and the reduced spectrum of validated and/or cross-reactive ones...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29773311/-corneal-endothelial-cell-therapy-a-review
#5
REVIEW
V Kocaba, O Damour, C Auxenfans, C Burillon
In France, endothelial dysfunction represents approximately one half of the indications for corneal transplants performed each year. However, the use of endothelial keratoplasty is limited by the technical difficulty of the procedure, a shortage of available grafts, and the potential for graft failure or rejection. These limitations are driving researchers to develop new, less invasive, and more effective therapies. Corneal endothelial cell therapy is being explored as a potential therapeutic measure, to avoid the uncertainty associated with grafting...
May 14, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29773224/early-env-specific-ctls-effectively-suppress-viral-replication-in-shiv-controller-macaques
#6
Jin Fan, Hua Liang, Tao Shen, Shuo Wang, Xiaolin Ji, Cassian Yee, Fengmin Lu, Yiming Shao
Early immunological events in acute HIV infection are thought to fundamentally influence long-term disease outcomes. Though the contribution of Gag-specific CD8 T cell responses to early viral control is well established, little is known about the role of Env-specific CD8 T cell responses in controlling viral replication during acute infection. In a macaque simian-human immunodeficiency virus (SHIV) model, some macaques who were able to control SHIV replication after ART interruption showed expansion of Env-specific CD8 T cell responses during acute infection, compared to macaques who progressed to viral rebound...
May 5, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29772765/protein-carbamylation-a-marker-reflecting-increased-age-related-cell-oxidation
#7
Julia Carracedo, Rafael Ramírez-Carracedo, Irene Martínez de Toda, Carmen Vida, Matilde Alique, Mónica De la Fuente, Rafael Ramírez-Chamond
Carbamylation is a post-translational modification of proteins that may partake in the oxidative stress-associated cell damage, and its increment has been recently proposed as a "hallmark of aging". The molecular mechanisms associated with aging are related to an increased release of free radicals. We have studied whether carbamylated proteins from the peripheral blood of healthy subjects are related to oxidative damage and aging, taking into account the gender and the immune profile of the subjects...
May 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29772762/paradoxical-effect-of-chloroquine-treatment-in-enhancing-chikungunya-virus-infection
#8
Pierre Roques, Simon-Djamel Thiberville, Laurence Dupuis-Maguiraga, Fok-Moon Lum, Karine Labadie, Frédéric Martinon, Gabriel Gras, Pierre Lebon, Lisa F P Ng, Xavier de Lamballerie, Roger Le Grand
Since 2005, Chikungunya virus (CHIKV) re-emerged and caused numerous outbreaks in the world, and finally, was introduced into the Americas in 2013. The lack of CHIKV-specific therapies has led to the use of non-specific drugs. Chloroquine, which is commonly used to treat febrile illnesses in the tropics, has been shown to inhibit CHIKV replication in vitro. To assess the in vivo effect of chloroquine, two complementary studies were performed: (i) a prophylactic study in a non-human primate model (NHP); and (ii) a curative study "CuraChik", which was performed during the Reunion Island outbreak in 2006 in a human cohort...
May 17, 2018: Viruses
https://www.readbyqxmd.com/read/29772544/antigen-specific-therapy-of-graves%C3%A2-disease-and-orbitopathy-by-induction-of-tolerance
#9
Martin Ungerer, Julia Fabbender, Hans-Peter Holthoff
Graves´ disease is an autoimmune disorder, which is characterized by stimulatory antibodies targeting the human thyrotropin receptor (TSHR), resulting in hyperthyroidism and multiple organ damage. The disease can be modelled in mice using adenoviral immunizations with the extracellular A subunit of the TSHR, which induces a long-term stable disease state. TSHR binding cAMP-stimulatory antibodies, thyroid enlargement, elevated serum thyroxin levels, tachycardia, cardiac hypertrophy and orbitopathy are observed in these Ad-TSHR-immunized mice...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29772494/effects-of-ceftriaxone-induced-intestinal-dysbacteriosis-on-regulatory-t-cells-validated-by-anaphylactic-mice
#10
Xia Luo, Zengfeng Pan, Shuang Luo, Qi Liu, Shaowei Huang, Guanghua Yang, Feifei Nong, Yajun Fu, Xiangliang Deng, Lian Zhou
Both probiotics and pathogens in the human gut express pathogen-associated molecular patterns (PAMPs) and die with the release of endotoxin and bacterial DNA, which can stimulate our immune system and cause immune reaction. However, it's interesting and fascinating to address why the normal intestinal flora will not generate immunological rejection like the pathogen does. By investigating the changes in cells and molecules relevant to immune tolerance in mice with ceftriaxone-induced dysbacteriosis, our study discovered that both the Evenness indexes and Shannon Wiener index of intestinal flora showed a decrease in dysbacteriosis mice...
May 14, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29772310/recombination-activity-of-human-rag2-mutations-and-correlation-with-the-clinical-phenotype
#11
Irit Tirosh, Yasuhiro Yamazaki, Francesco Frugoni, Francesca A Ververs, Eric J Allenspach, Yu Zhang, Siobhan Burns, Waleed Al-Herz, Lenora Noroski, Jolan E Walter, Andrew R Gennery, Mirjam van der Burg, Luigi D Notarangelo, Yu Nee Lee
BACKGROUND: Mutations in the Recombinase Activating Gene 1 and 2 (RAG1, RAG2) are associated with a broad range of clinical and immunological phenotypes in humans. OBJECTIVE: Using a flow cytometry-based assay, we aimed to measure the recombinase activity of naturally occurring RAG2 mutant proteins, and to correlate results with the severity of the clinical and immunological phenotype. METHODS: Abelson virus-transformed Rag2-/- pro-B cells engineered to contain an inverted GFP cassette flanked by recombination signal sequences (RSS) were transduced with retroviruses encoding either wild-type or 41 naturally occurring RAG2 variants...
May 14, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29771871/trends-in-antiretroviral-therapy-eligibility-and-coverage-among-children-aged-15-years-with-hiv-infection-20-pepfar-supported-sub-saharan-african-countries-2012-2016
#12
Amanda Burrage, Monita Patel, Kelsey Mirkovic, Eric Dziuban, Wondimu Teferi, Laura Broyles, Emilia Rivadeneira
Rapid disease progression and associated opportunistic infections contribute to high mortality rates among children aged <15 years with human immunodeficiency virus (HIV) infection (1). Antiretroviral therapy (ART) has decreased childhood HIV-associated morbidity and mortality rates over the past decade (2). As accumulating evidence revealed lower HIV-associated mortality with early ART initiation, the World Health Organization (WHO) guidelines broadened ART eligibility for children with HIV infection (2)...
May 18, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29768182/enhanced-production-and-immunological-characterization-of-recombinant-west-nile-virus-envelope-domain-iii-protein
#13
Nagesh K Tripathi, Divyanshi Karothia, Ambuj Shrivastava, Swati Banger, Jyoti S Kumar
West Nile virus (WNV) is an emerging mosquito-borne virus which is responsible for severe and fatal encephalitis in humans and for which there is no licensed vaccine or therapeutic available to prevent infection. The envelope domain III protein (EDIII) of WNV was over-expressed in Escherichia coli and purified using a two-step chromatography process which included immobilized metal affinity chromatography and ion exchange chromatography. E. coli cells were grown in a bioreactor to high density using batch and fed-batch cultivation...
May 13, 2018: New Biotechnology
https://www.readbyqxmd.com/read/29768174/hiv-1-vaccines-based-on-antibody-identification-b-cell-ontogeny-and-epitope-structure
#14
REVIEW
Peter D Kwong, John R Mascola
HIV-1 vaccine development has been stymied by an inability to induce broadly reactive neutralizing antibodies to the envelope (Env) trimer, the sole viral antigen on the virion surface. Antibodies isolated from HIV-1-infected donors, however, have been shown to recognize all major exposed regions of the prefusion-closed Env trimer, and an emerging understanding of the immunological and structural characteristics of these antibodies and the epitopes they recognize is enabling new approaches to vaccine design...
May 15, 2018: Immunity
https://www.readbyqxmd.com/read/29767504/motion-based-immunological-detection-of-zika-virus-using-pt-nanomotors-and-a-cellphone
#15
Mohamed Shehata Draz, Nivethitha Kota Lakshminaraasimulu, Sanchana Krishnakumar, Dheerendranath Battalapalli, Anish Vasan, Manoj Kumar Kanakasabapathy, Aparna Sreeram, Shantanu Kallakuri, Prudhvi Thirumalaraju, Yudong Li, Stephane Hua, Xu G Yu, Daniel R Kuritzkes, Hadi Shafiee
Zika virus (ZIKV) infection is an emerging pandemic threat to humans that can be fatal in newborns. Advances in digital health systems and nanoparticles can facilitate the development of sensitive and portable detection technologies for timely management of emerging viral infections. Here we report a nanomotor-based bead-motion cellphone (NBC) system for the immunological detection of ZIKV. The presence of virus in a testing sample results in the accumulation of platinum (Pt)-nanomotors on the surface of beads, causing their motion in H2 O2 solution...
May 16, 2018: ACS Nano
https://www.readbyqxmd.com/read/29765285/anemia-and-thrombocytopenia-in-the-cohort-of-hiv-infected-adults-in-northwest-ethiopia-a-facility-based-cross-sectional-study
#16
Tekalign Deressa, Debasu Damtie, Meseret Workineh, Meaza Genetu, Mulugeta Melku
Background: Anemia and thrombocytopenia are frequent hematological abnormalities in patients with human immunodeficiency virus (HIV) infection and have been associated with increased morbidity and mortality. However, there is a paucity of data on the prevalence and correlates of these hematological abnormalities among HIV infected adults in Ethiopia. The aim of this study was to determine the prevalence and correlates of anemia and thrombocytopenia in a cohort of HIV-1 infected adults in northwest Ethiopia...
April 2018: EJIFCC
https://www.readbyqxmd.com/read/29760710/ionizing-radiation-induces-morphological-changes-and-immunological-modulation-of-jurkat-cells
#17
Patrick Voos, Sebastian Fuck, Fabian Weipert, Laura Babel, Dominique Tandl, Tobias Meckel, Stephanie Hehlgans, Claudia Fournier, Anna Moroni, Franz Rödel, Gerhard Thiel
Impairment or stimulation of the immune system by ionizing radiation (IR) impacts on immune surveillance of tumor cells and non-malignant cells and can either foster therapy response or side effects/toxicities of radiation therapy. For a better understanding of the mechanisms by which IR modulates T-cell activation and alters functional properties of these immune cells, we exposed human immortalized Jurkat cells and peripheral blood lymphocytes (PBL) to X-ray doses between 0.1 and 5 Gy. This resulted in cellular responses, which are typically observed also in naïve T-lymphocytes in response of T-cell receptor immune stimulation or mitogens...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29760700/bacillus-calmette-gu%C3%A3-rin-induced-trained-immunity-is-not-protective-for-experimental-influenza-a-anhui-1-2013-h7n9-infection-in-mice
#18
Charlotte L C J de Bree, Renoud J Marijnissen, Junda M Kel, Sietske K Rosendahl Huber, Peter Aaby, Christine Stabell Benn, Marcel V W Wijnands, Dimitri A Diavatopoulos, Reinout van Crevel, Leo A B Joosten, Mihai G Netea, John Dulos
Avian influenza A of the subtype H7N9 has been responsible for almost 1,600 confirmed human infections and more than 600 deaths since its first outbreak in 2013. Although sustained human-to-human transmission has not been reported yet, further adaptations to humans in the viral genome could potentially lead to an influenza pandemic, which may have severe consequences due to the absence of pre-existent immunity to this strain at population level. Currently there is no influenza A (H7N9) vaccine available. Therefore, in case of a pandemic outbreak, alternative preventive approaches are needed, ideally even independent of the type of influenza virus outbreak...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29760694/dissemination-of-orientia-tsutsugamushi-a-causative-agent-of-scrub-typhus-and-immunological-responses-in-the-humanized-draga-mouse
#19
Le Jiang, Erin K Morris, Rodrigo Aguilera-Olvera, Zhiwen Zhang, Teik-Chye Chan, Soumya Shashikumar, Chien-Chung Chao, Sofia A Casares, Wei-Mei Ching
Scrub typhus is caused by Orientia tsutsugamushi , an obligated intracellular bacterium that affects over one million people per year. Several mouse models have been used to study its pathogenesis, disease immunology, and for testing vaccine candidates. However, due to the intrinsic differences between the immune systems in mouse and human, these mouse models could not faithfully mimic the pathology and immunological responses developed by human patients, limiting their value in both basic and translational studies...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29760533/cross-specificity-of-protective-human-antibodies-against-klebsiella-pneumoniae-lps-o-antigen
#20
Tim Rollenske, Valeria Szijarto, Jolanta Lukasiewicz, Luis M Guachalla, Katarina Stojkovic, Katharina Hartl, Lukas Stulik, Simone Kocher, Felix Lasitschka, Mohammed Al-Saeedi, Jutta Schröder-Braunstein, Moritz von Frankenberg, Gereon Gaebelein, Peter Hoffmann, Sabrina Klein, Klaus Heeg, Eszter Nagy, Gabor Nagy, Hedda Wardemann
Humoral immune responses to microbial polysaccharide surface antigens can prevent bacterial infection but are typically strain specific and fail to mediate broad protection against different serotypes. Here we describe a panel of affinity-matured monoclonal human antibodies from peripheral blood immunoglobulin M-positive (IgM+ ) and IgA+ memory B cells and clonally related intestinal plasmablasts, directed against the lipopolysaccharide (LPS) O-antigen of Klebsiella pneumoniae, an opportunistic pathogen and major cause of antibiotic-resistant nosocomial infections...
May 14, 2018: Nature Immunology
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