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https://www.readbyqxmd.com/read/28806737/effectiveness-of-the-13-valent-pneumococcal-conjugate-vaccine-in-preventing-invasive-pneumococcal-disease-in-children-aged-7-59-months-a-matched-case-control-study
#1
Ángela Domínguez, Pilar Ciruela, Sergi Hernández, Juan José García-García, Núria Soldevila, Conchita Izquierdo, Fernando Moraga-Llop, Alvaro Díaz, Mariona F de Sevilla, Sebastià González-Peris, Magda Campins, Sonia Uriona, Johanna Martínez-Osorio, Anna Solé-Ribalta, Gemma Codina, Cristina Esteva, Ana María Planes, Carmen Muñoz-Almagro, Luis Salleras
BACKGROUND: The 13-valent pneumococcal conjugate vaccine (PCV13) was licensed based on the results of immunogenicity studies and correlates of protection derived from randomized clinical trials of the 7-valent conjugate pneumococcal vaccine. We assessed the vaccination effectiveness (VE) of the PCV13 in preventing invasive pneumococcal disease (IPD) in children aged 7-59 months in a population with suboptimal vaccination coverage of 55%. METHODS: The study was carried out in children with IPD admitted to three hospitals in Barcelona (Spain) and controls matched by hospital, age, sex, date of hospitalization and underlying disease...
2017: PloS One
https://www.readbyqxmd.com/read/28806522/development-of-a-recombinant-multifunctional-biomacromolecule-for-targeted-gene-transfer-to-prostate-cancer-cells
#2
Arash Hatefi, Zahra Karjoo, Alireza Nomani
The objective of this study was to genetically engineer a fully functional single chain fusion peptide composed of motifs from diverse biological and synthetic origins that can perform multiple tasks including DNA condensation, cell targeting, cell transfection, particle shielding from immune system and effective gene transfer to prostate tumors. To achieve the objective, a single chain biomacromolecule (vector) consisted of four repetative units of histone H2A peptide, fusogenic peptide GALA, short elastin-like peptide and PC-3 cell targeting peptide was designed...
August 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28805676/inhibitors-of-deubiquitinating-enzymes-block-hiv-1-replication-and-augment-the-presentation-of-gag-derived-mhc-i-epitopes
#3
Christian Setz, Melanie Friedrich, Pia Rauch, Kirsten Fraedrich, Alina Matthaei, Maximilian Traxdorf, Ulrich Schubert
In recent years it has been well established that two major constituent parts of the ubiquitin proteasome system (UPS)-the proteasome holoenzymes and a number of ubiquitin ligases-play a crucial role, not only in virus replication but also in the regulation of the immunogenicity of human immunodeficiency virus type 1 (HIV-1). However, the role in HIV-1 replication of the third major component, the deubiquitinating enzymes (DUBs), has remained largely unknown. In this study, we show that the DUB-inhibitors (DIs) P22077 and PR-619, specific for the DUBs USP7 and USP47, impair Gag processing and thereby reduce the infectivity of released virions without affecting viral protease activity...
August 12, 2017: Viruses
https://www.readbyqxmd.com/read/28805010/characterization-of-hydrogels-made-of-a-novel-spider-silk-protein-emasp1s-and-evaluation-for-3d-printing
#4
Christopher Thamm, Elise DeSimone, Thomas Scheibel
Recombinantly produced spider silk proteins have high potential for bioengineering and various biomedical applications because of their biocompatibility, biodegradability, and low immunogenicity. Here, the recently described small spider silk protein eMaSp1s is assembled into hydrogels, which can be 3D printed into scaffolds. Further, blending with a recombinantly produced MaSp2 derivative eADF4(C16) alters the mechanical properties of the resulting hydrogels. Different spider silk hydrogels also show a distinct recovery after a high shear stress deformation, exhibiting the tunability of their features for selected applications...
August 14, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28804955/3m-052-as-an-adjuvant-for-a-plga-microparticle-based-leishmania-donovani-recombinant-protein-vaccine
#5
Qian Wang, Meagan A Barry, Christopher A Seid, Elissa M Hudspeth, C Patrick McAtee, Michael J Heffernan
It is believed that an effective vaccine against leishmaniasis will require a T helper type 1 (TH 1) immune response. In this study, we investigated the adjuvanticity of the Toll-like receptor (TLR) 7/8 agonist 3M-052 in combination with the Leishmania donovani 36-kDa nucleoside hydrolase recombinant protein antigen (NH36). NH36 and 3M-052 were encapsulated in separate batches of poly(lactic-co-glycolic acid) (PLGA) microparticles (MPs). The loading efficiency for NH36 was 83% and for 3M-052 was above 95%. In vitro stimulation of bone marrow-derived dendritic cells, measured by IL-12 secretion, demonstrated that 3M-052 (free or MP-formulated) had a concentration-dependent immunostimulatory effect with an optimum concentration of 2 µg/mL...
August 14, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28804866/virally-vectored-vaccine-delivery-medical-needs-mechanisms-advantages-and-challenges
#6
Daniel D Pinschewer
Vaccines represent one of the most successful chapters in the history of medicine. Over the past decades, the advent of recombinant cDNA technology has enabled the biomedical community to genetically engineer viruses for vaccine delivery purposes. As a starting point, this review evaluates the unmet medical needs, which drive scientists and industry to exploit such fundamentally new technology for human vaccination. The author discusses the molecular functioning, production and safety profile of replication-competent and -deficient viral vector systems, representing two fundamentally distinct classes of "genetic vaccines"...
August 14, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28804714/reduction-of-mosquito-survival-in-mice-vaccinated-with-anopheles-stephensi-glucose-transporter
#7
J Couto, S Antunes, J Ferrolho, J de la Fuente, A Domingos
Despite the fact that recent efforts to control/eradicate malaria have contributed to a significant decrease in the number of cases and deaths, the disease remains a global health challenge. Vaccines based on mosquito salivary gland antigens are a potential approach for reducing vector populations and malaria parasites. The Anopheles AGAP007752 gene encodes for a glucose transporter that is upregulated during Plasmodium infection, and its knockdown decreases the number of sporozoites in mosquito salivary glands...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28804606/a-multiple-antigen-detection-assay-for-tuberculosis-diagnosis-based-on-broadly-reactive-polyclonal-antibodies
#8
Zhenhua Dai, Zhiqiang Liu, Bingshui Xiu, Xiqin Yang, Ping Zhao, Xuhui Zhang, Cuimi Duan, Haiping Que, Heqiu Zhang, Xiaoyan Feng
OBJECTIVES: Detection of circulating Mycobacterium tuberculosis (M. tuberculosis) antigens is promising in Tuberculosis (TB) diagnosis. However, not a single antigen marker has been found to be widely expressed in all TB patients. This study is aimed to prepare broadly reactive polyclonal antibodies targeting multiple antigen markers (multi-target antibodies) and evaluate their efficacies in TB diagnosis. MATERIALS AND METHODS: A fusion gene consisting of 38kD, ESAT6, and CFP10 was constructed and overexpressed...
April 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28803753/recent-progresses-in-biomedical-applications-of-aptamer-functionalized-systems
#9
REVIEW
Fei Ding, Yangguang Gao, Xianran He
Aptamers, known as "chemical antibodies" are screened via a combinational technology of systematic evolution of ligands by exponential enrichment (SELEX). Due to their specific targeting ability, high binding affinity, low immunogenicity and easy modification, aptamer-functionalized systems have been extensively applied in various fields and exhibit favorable results. However, there is still a long way for them to be commercialized, and few aptamer-functionalized systems have yet successfully entered clinical and industrial use...
March 18, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28803721/conditioning-neoadjuvant-therapies-for-improved-immunotherapy-of-cancer
#10
REVIEW
Zachary Benson, Saeed H Manjili, Mehran Habibi, Georgi Guruli, Amir A Toor, Kyle K Payne, Masoud H Manjili
Recent advances in the treatment of melanoma and non-small cell lung cancer (NSCLC) by combining conventional therapies with anti-PD1/PD-L1 immunotherapies, have renewed interests in immunotherapy of cancer. The emerging concept of conventional cancer therapies combined with immunotherapy differs from the classical concept in that it is not simply taking advantage of their additive anti-tumor effects, but it is to use certain therapeutic regimens to condition the tumor microenvironment for optimal response to immunotherapy...
August 10, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28803502/immunogenicity-antibody-persistence-and-safety-of-the-60-%C3%AE-g-hepatitis-b-vaccine-in-hemodialysis-patients-a-multicenter-randomized-double-blind-parallel-controlled-trial
#11
Yongliang Feng, Xiaohong Shi, Jing Shi, Linying Gao, Guangming Liu, Yanpeng Cheng, Minghu Pan, Chunxia Li, Jun Wang, Xuxia Guo, Yawei Zhang, Xiaofeng Liang, Suping Wang
OBJECTIVES: To evaluate the immunogenicity, antibody persistence, and safety of the 60µg hepatitis B vaccine in hemodialysis patients in China. METHODS: We conducted a multicenter, randomized, double-blind, parallel-controlled trial including 352 hemodialysis patients who were centrally randomized in a ratio of 1:1 to receive a 20 µg (IM20 group) or 60 µg (IM60 group) recombinant hepatitis B vaccine at months 0, 1, and 6. RESULTS: The vaccine-elicited antibody responses peaked at month 7, and declined at month 12...
August 14, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28803431/sb2-an-infliximab-biosimilar
#12
Yvette N Lamb, Lesley J Scott, Emma D Deeks
SB2 is a biosimilar of the reference anti-TNF-α antibody infliximab. In May 2015, it was approved in the EU for use in all indications for which reference infliximab is approved, including rheumatoid arthritis, ankylosing spondylitis, Crohn's disease, ulcerative colitis, psoriatic arthritis and psoriasis. It is also approved in these indications in several other countries, including Korea, the USA and Australia. Characterization of SB2 in preclinical studies showed that it is similar to reference infliximab...
August 12, 2017: BioDrugs: Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy
https://www.readbyqxmd.com/read/28803127/direct-antioxidant-properties-of-methotrexate-inhibition-of-malondialdehyde-acetaldehyde-protein-adduct-formation-and-superoxide-scavenging
#13
Matthew C Zimmerman, Dahn L Clemens, Michael J Duryee, Cleofes Sarmiento, Andrew Chiou, Carlos D Hunter, Jun Tian, Lynell W Klassen, James R O'Dell, Geoffrey M Thiele, Ted R Mikuls, Daniel R Anderson
Methotrexate (MTX) is an immunosuppressant commonly used for the treatment of autoimmune diseases. Recent observations have shown that patients treated with MTX also exhibit a reduced risk for the development of cardiovascular disease (CVD). Although MTX reduces systemic inflammation and tissue damage, the mechanisms by which MTX exerts these beneficial effects are not entirely known. We have previously demonstrated that protein adducts formed by the interaction of malondialdehyde (MDA) and acetaldehyde (AA), known as MAA-protein adducts, are present in diseased tissues of individuals with rheumatoid arthritis (RA) or CVD...
August 2, 2017: Redox Biology
https://www.readbyqxmd.com/read/28803057/cross-reactivity-and-cross-immunomodulation-between-venoms-of-the-snakes-bothrops-asper-crotalus-simus-and-lachesis-stenophrys-and-its-effect-in-the-production-of-polyspecific-antivenom-for-central-america
#14
Cynthia Arroyo, Sergio Solano, Álvaro Segura, María Herrera, Ricardo Estrada, Mauren Villalta, Mariángela Vargas, José María Gutiérrez, Guillermo León
A mixture of the venoms of Bothrops asper, Crotalus simus and Lachesis stenophrys is used as immunogen to produce the polyspecific Central American antivenom (PoliVal-ICP). In this work, we studied the ability of each of these venoms to modulate the antibody response induced by the other two venoms included in the immunization mixture. For that, equine monospecific, bispecific and polyspecific antivenoms were prepared and compared regarding their ability to neutralize the phospholipase A2, coagulant and lethal activities of each venom, and their anti-venom antibodies concentration...
August 9, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28803053/optimized-transitory-ectopic-expression-of-promastigote-surface-antigen-protein-in-nicotiana-benthamiana-a-potential-anti-leishmaniasis-vaccine-candidate
#15
Séverine Lacombe, Martine Bangratz, Jean-Paul Brizard, Elodie Petitdidier, Julie Pagniez, Drissa Sérémé, Jean-Loup Lemesre, Christophe Brugidou
In recent years, plants have been shown to be an efficient alternative expression system for high-value pharmaceuticals such as vaccines. However, constitutive expression of recombinant protein remains uncertain on their level of production and biological activity. To overcome these problems, transitory expression systems have been developed. Here, a series of experiments were performed to determine the most effective conditions to enhance vaccine antigen transient accumulation in Nicotiana benthamiana leaves using the promastigote surface antigen (PSA) from the parasitic protozoan Leishmania infantum...
August 10, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28802994/expression-and-purification-of-norovirus-virus-like-particles-in-escherichia-coli-and-their-immunogenicity-in-mice
#16
Yuqi Huo, Xin Wan, Tong Ling, Jie Wu, Wenhui Wang, Shuo Shen
Norovirus (NoV) virus like particles (VLPs) produced in Spodoptera frugiperda (Sf9) cells have been tested in human volunteers as vaccine candidate and were shown to be protective against NoV induced acute gastroenteritis. In this study, prevailing Sydney-2012-like NoV major capsid protein gene with or without N-terminal deletions (N26 and N38, 26 and 38 amino acids deleted from N terminus,respectively) were sub-cloned into prokaryotic expression vector, pCold III and pCold IV. Soluble and insoluble proteins were detected for both vectors after induction and higher levels of protein expression were observed for constructs pCold III-N26 and pCold III-N38...
August 9, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28802755/pneumococcal-conjugate-vaccination-response-in-patients-after-community-acquired-pneumonia-differences-in-patients-with-s-pneumoniae-versus-other-pathogens
#17
G H J Wagenvoort, B J M Vlaminckx, D A van Kessel, R C L Geever, B A W de Jong, J C Grutters, W J W Bos, B Meek, G T Rijkers
OBJECTIVES: The goal of this study is to investigate the immune response to the 13-valent pneumococcal conjugate vaccine (PCV13) in former pneumococcal CAP patients. We hypothesize that an impaired or suboptimal humoral immune response against (specific) pneumococcal serotypes might explain the vulnerability for pneumococcal disease. METHODS: Hospitalised adult CAP patients who participated in two trials (2004-2006 (n=201) and, 2007-2009 (n=304)) were screened. Patients eligible for inclusion had CAP caused by either S...
August 9, 2017: Vaccine
https://www.readbyqxmd.com/read/28802495/the-immunology-of-melanoma
#18
REVIEW
Jennifer S Ko
The relatively high DNA mutational burden in melanoma allows for the creation of potentially "foreign," immune-stimulating neoantigens, and leads to its exceptional immunogenicity. Brisk tumor-infiltrating lymphocytes, a marker of immune editing, confer improved overall survival in melanoma, possibly due to reduced sentinel lymph node spread. Meanwhile, T-cell-stimulating drugs, so-called T-cell checkpoint inhibitors, which reverse peripheral tolerance-dependent tumor escape, have demonstrated unparalleled clinical success in metastatic melanoma...
September 2017: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/28802400/mycobacterium-tuberculosis-myma-is-a-tlr2-agonist-that-activate-macrophages-and-a-th1-response
#19
Iti Saraav, Swati Singh, Kirti Pandey, Monika Sharma, Sadhna Sharma
Cell wall of Mycobacterium tuberculosis (M.tb) is a major source of immunogenic proteins that can be tested as vaccine candidates. MymA (Rv3083), a 55 kDa M.tb flavin containing monooxygenase, is involved in modification of mycolic acids during acidic shock following M.tb internalization in macrophage. In this study, we have investigated the role of this cell wall associated protein in activation of macrophages by toll like receptor (TLRs) engagement and subsequent signaling. Our results showed that MymA stimulation of THP1 cells and human monocyte derived macrophages (MDM) lead to upregulation of TLR2 and co-stimulatory molecules CD40, CD80, CD86 and HLA-DR...
September 2017: Tuberculosis
https://www.readbyqxmd.com/read/28801154/progress-in-prophylactic-human-papillomavirus-hpv-vaccination-in-2016-a-literature-review
#20
Polona J Maver, Mario Poljak
Prophylactic human papillomavirus (HPV) vaccine represents a revolutionary step forward in preventing HPV-related cancers, especially cervical carcinoma. Alongside appropriate screening, it has the potential to dramatically reduce cervical cancer incidence and even eradicate it. Following extensive evaluations in clinical trials, the first decade of routine HPV vaccine use provides overwhelming evidence of the vaccines' safety and their real-life effectiveness. In 2016, further clinical trials showed high vaccine efficacy in adult women, especially those that were HPV DNA-negative at baseline, and indicated possible protection from HPV-related diseases after treatment of precancerous cervical lesions...
August 8, 2017: Vaccine
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