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https://www.readbyqxmd.com/read/29029265/preclinical-testing-of-a-broad-spectrum-antimicrobial-endotracheal-tube-coated-with-an-innate-immune-synthetic-mimic
#1
Marjan M Hashemi, John Rovig, Jordan Bateman, Brett S Holden, Tomasz Modelzelewski, Iliana Gueorguieva, Martin von Dyck, Ronald Bracken, Carl Genberg, Shenglou Deng, Paul B Savage
Background: Endotracheal tubes provide an abiotic surface on which bacteria and fungi form biofilms, and the release of endotoxins and planktonic organisms can cause damaging inflammation and infections. Objectives: Ceragenins are small molecule mimics of antimicrobial peptides with broad-spectrum antibacterial and antifungal activity, and a ceragenin may be used to provide antimicrobial protection to the abiotic surface of an endotracheal tube. Methods: A hydrogel film, containing CSA-131, was generated on endotracheal tubes...
October 4, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29029122/immunogenicity-and-safety-of-the-hz-su-adjuvanted-herpes-zoster-subunit-vaccine-in-adults-previously-vaccinated-with-a-live-attenuated-herpes-zoster-vaccine
#2
Katrijn Grupping, Laura Campora, Martine Douha, Thomas C Heineman, Nicola P Klein, Himal Lal, James Peterson, Ilse Vastiau, Lidia Oostvogels
Background: Protection against herpes zoster (HZ) induced by the live-attenuated zoster vaccine Zostavax (ZVL) wanes within 3-7 years. Re-vaccination may renew protection. We assessed whether (re)-vaccination with the adjuvanted HZ subunit vaccine candidate (HZ/su) induced comparable immune responses in previous ZVL-recipients and ZVL-naïve individuals (HZ-NonVac). Methods: In an open-label, multicenter study (NCT02581410), adults ≥65 years of age, vaccinated with ZVL ≥5 years previously (HZ-PreVac), were matched to HZ-NonVac adults...
September 26, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29028900/unravelling-the-biological-secrets-of-microchimerism-by-single-cell-analysis
#3
Anders Ståhlberg, Amin El-Heliebi, Peter Sedlmayr, Thomas Kroneis
The presence of microchimeric cells is known for >100 years and well documented since decades. Earlier, microchimeric cells were mainly used for cell-based non-invasive prenatal diagnostics during early pregnancy. Microchimeric cells are also present beyond delivery and are associated to various autoimmune diseases, tissue repair, cancer and immune tolerance. All these findings were based on low complexity studies and occasionally accompanied by artefacts not allowing the biological functions of microchimerism to be determined...
September 28, 2017: Briefings in Functional Genomics
https://www.readbyqxmd.com/read/29028814/diversity-and-microevolution-of-crispr-loci-in-helicobacter-cinaedi
#4
Junko Tomida, Yuji Morita, Keigo Shibayama, Ken Kikuchi, Tomohiro Sawa, Takaaki Akaike, Yoshiaki Kawamura
Helicobacter cinaedi is associated with nosocomial infections. The CRISPR-Cas system provides adaptive immunity against foreign genetic elements. We investigated the CRISPR-Cas system in H. cinaedi to assess the potential of the CRISPR-based microevolution of H. cinaedi strains. A genotyping method based on CRISPR spacer organization was carried out using 42 H. cinaedi strains. The results of sequence analysis showed that the H. cinaedi strains used in this study had two CRISPR loci (CRISPR1 and CRISPR2). The lengths of the consensus direct repeat sequences in CRISPR1 and CRISPR2 were both 36 bp-long, and 224 spacers were found in the 42 H...
2017: PloS One
https://www.readbyqxmd.com/read/29027811/prevention-of-human-papillomavirus-hpv-related-tumors-in-people-living-with-human-immunodeficiency-virus-hiv
#5
Mario Poljak, Anja Šterbenc, Maja M Lunar
In comparison to their HIV-negative counterparts, people living with HIV (PLWH) have a higher prevalence of human papillomavirus (HPV) infection in various anatomical sites coupled with increased HPV persistence, higher risk of HPV-related tumors, and faster disease progression. Areas covered: Gender-neutral prevention strategies for HPV-related cancers in PLWH discussed: ABC approach, HPV vaccination, antiretroviral treatment (ART), anal cancer screening, and smoking cessation. Gender specific strategies: cervical cancer screening reduces the incidence and mortality of cervical cancer and circumcision might reduce the risk of HPV infections in men...
October 13, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29027226/efferocytosis-of-dying-cells-differentially-modulate-immunological-outcomes-in-tumor-microenvironment
#6
REVIEW
Sushil Kumar, David Calianese, Raymond B Birge
Programmed cell death (apoptosis) is an integral part of tissue homeostasis in complex organisms, allowing for tissue turnover, repair, and renewal while simultaneously inhibiting the release of self antigens and danger signals from apoptotic cell-derived constituents that can result in immune activation, inflammation, and autoimmunity. Unlike cells in culture, the physiological fate of cells that die by apoptosis in vivo is their rapid recognition and engulfment by phagocytic cells (a process called efferocytosis)...
November 2017: Immunological Reviews
https://www.readbyqxmd.com/read/29027223/inflammatory-cell-death-in-intestinal-pathologies
#7
REVIEW
Deepika Sharma, Thirumala-Devi Kanneganti
The intestinal tract is a site of intense immune cell activity that is poised to mount an effective response against a pathogen and yet maintain tolerance toward commensal bacteria and innocuous dietary antigens. The role of cell death in gut pathologies is particularly important as the intestinal epithelium undergoes self-renewal every 4-7 days through a continuous process of cell death and cell division. Cell death is also required for removal of infected, damaged, and cancerous cells. Certain forms of cell death trigger inflammation through release of damage-associated molecular patterns...
November 2017: Immunological Reviews
https://www.readbyqxmd.com/read/29026567/proactive-use-of-eltrombopag-before-the-onset-of-clinical-bleeding-in-two-children-with-immune-thrombocytopenia-and-lifestyle-restrictions
#8
Shayla Bergmann
Children with immune thrombocytopenia (ITP) are often managed using a watch-and-wait approach to avoid conventional treatment that may be poorly tolerated. However, in some patients, this approach may lead to lifestyle restrictions due to risk of injury-related bleeding. Eltrombopag is a well-tolerated new option that may help these children.
October 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29026335/challenging-the-standard-of-care-in-advanced-melanoma-focus-on-pembrolizumab
#9
REVIEW
Raghad M Abdul-Karim, C Lance Cowey
The last several years have seen a dramatic rise in the number of effective therapies that have been shown to improve survival outcomes for patients with advanced melanoma. Among these treatments are the immune checkpoint inhibitors, a new class of immunotherapy, that have demonstrated the ability to improve both response rates and survival outcomes. Pembrolizumab, an immune checkpoint inhibitor that blocks the negative regulatory PD-1 receptor on T-cell lymphocytes, has shown improved efficacy compared to standard therapies with an acceptable tolerability profile...
2017: Cancer Management and Research
https://www.readbyqxmd.com/read/29026191/mechanisms-involved-in-the-triggering-of-neutrophil-extracellular-traps-nets-by-candida-glabrata-during-planktonic-and-biofilm-growth
#10
Chad J Johnson, John F Kernien, Amanda R Hoyer, Jeniel E Nett
Candida spp. adhere to medical devices, such as catheters, forming drug-tolerant biofilms that resist killing by the immune system. Little is known about how C. glabrata, an emerging pathogen, resists attack by phagocytes. Here we show that upon encounter with planktonic (non-biofilm) C. glabrata, human neutrophils initially phagocytose the yeast and subsequently release neutrophil extracellular traps (NETs), complexes of DNA, histones, and proteins capable of inhibiting fungal growth and dissemination. When exposed to C...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29026141/combined-skin-and-muscle-vaccination-differentially-impact-the-quality-of-effector-t-cell-functions-the-cuthivac-001-randomized-trial
#11
G Haidari, A Cope, A Miller, S Venables, C Yan, H Ridgers, K Reijonen, D Hannaman, A Spentzou, P Hayes, G Bouliotis, A Vogt, S Joseph, B Combadiere, S McCormack, R J Shattock
Targeting of different tissues via transcutaneous (TC), intradermal (ID) and intramuscular (IM) injection has the potential to tailor the immune response to DNA vaccination. In this Phase I randomised controlled clinical trial in HIV-1 negative volunteers we investigate whether the site and mode of DNA vaccination influences the quality of the cellular immune responses. We adopted a strategy of concurrent immunization combining IM injection with either ID or TC administration. As a third arm we assessed the response to IM injection administered with electroporation (EP)...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29026074/structural-insights-into-the-competitive-inhibition-of-the-atp-gated-p2x-receptor-channel
#12
Go Kasuya, Toshiaki Yamaura, Xiao-Bo Ma, Ryoki Nakamura, Mizuki Takemoto, Hiromitsu Nagumo, Eiichi Tanaka, Naoshi Dohmae, Takanori Nakane, Ye Yu, Ryuichiro Ishitani, Osamu Matsuzaki, Motoyuki Hattori, Osamu Nureki
P2X receptors are non-selective cation channels gated by extracellular ATP, and the P2X7 receptor subtype plays a crucial role in the immune and nervous systems. Altered expression and dysfunctions of P2X7 receptors caused by genetic deletions, mutations, and polymorphic variations have been linked to various diseases, such as rheumatoid arthritis and hypertension. Despite the availability of crystal structures of P2X receptors, the mechanism of competitive antagonist action for P2X receptors remains controversial...
October 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29026071/arginine-methylation-catalyzed-by-prmt1-is-required-for-b-cell-activation-and-differentiation
#13
Simona Infantino, Amanda Light, Kristy O'Donnell, Vanessa Bryant, Danielle T Avery, Michael Elliott, Stuart G Tangye, Gabrielle Belz, Fabienne Mackay, Stephane Richard, David Tarlinton
Arginine methylation catalyzed by protein arginine methyltransferases (PRMT) is a common post-translational modification in mammalian cells, regulating many important functions including cell signalling, proliferation and differentiation. Here we show the role of PRMT1 in B-cell activation and differentiation. PRMT1 expression and activity in human and mouse peripheral B cells increases in response to in vitro or in vivo activation. Deletion of the Prmt1 gene in mature B cells establishes that although the frequency and phenotype of peripheral B cell subsets seem unaffected, immune responses to T-cell-dependent and -independent antigens are substantially reduced...
October 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29024000/myeloid-notch1-deficiency-activates-rhoa-rock-pathway-and-aggravates-hepatocellular-damage-in-mouse-ischemic-livers
#14
Ling Lu, Shi Yue, Longfeng Jiang, Changyong Li, Qiang Zhu, Michael Ke, Hao Lu, Xuehao Wang, Ronald W Busuttil, Qi-Long Ying, Jerzy W Kupiec-Weglinski, Bibo Ke
Notch signaling plays an emerging role in the regulation of immune cell development and function during inflammatory response. Activation of the ras homolog gene family, member A (RhoA)/Rho-associated protein kinase (ROCK) pathway promotes leukocyte accumulation in tissue injury. However, it remains unknown whether Notch signaling regulates RhoA/ROCK-mediated immune responses in liver ischemia and reperfusion injury (IRI). This study investigated intracellular signaling pathways regulated by Notch receptors in the IR-stressed liver and in vitro...
October 12, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29023412/post-translational-modification-of-human-histone-by-wide-tolerance-of-acetylation
#15
Cuiling Li, Han-Pil Choi, Xiaoyue Wang, Fei Wu, Xinjun Chen, Xin Lü, Ruirui Jing, Hoon Ryu, Xingyuan Wang, Kazem M Azadzoi, Jing-Hua Yang
Histone acetylation adds an acetyl group on the lysine residue commonly found within the N-terminal tail protruding from the histone core of the nucleosome, and is important for chromosome structure and function in gene transcription and chromatin remodeling. Acetylation may also occur on other residues additional to lysine, but have not been thoroughly investigated at the proteomics level. Here we report a wide tolerance acetylation study mimicking the addition of 42 ± 0.5 Da delta mass modification on undefined amino acid residues of histones by shotgun proteomics using liquid chromatography-tandem mass spectrometry...
October 12, 2017: Cells
https://www.readbyqxmd.com/read/29021521/tristetraprolin-inhibits-macrophage-il-27-induced-activation-of-antitumour-cytotoxic-t-cell-responses
#16
Qinghong Wang, Huan Ning, Hui Peng, Lin Wei, Rong Hou, Daniel F Hoft, Jianguo Liu
IFN-γ-producing cytotoxic T lymphocytes are essential for host defense against viral infection and cancer. Here we show that the RNA-binding tristetraprolin, encoded by Zfp36, is needed for CD8(+) T-cell production of IFN-γ in vivo. When activated in vitro, however, IFN-γ production by naive wild type and tristetraprolin-deficient CD8(+) T-cells is comparable. IL-27 is overproduced by tristetraprolin-deficient macrophages and increased systemically in tristetraprolin-deficient mice. Tristetraprolin suppresses IL-27 production by promoting p28 mRNA degradation...
October 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29021365/lactic-acid-no-longer-an-inert-and-end-product-of-glycolysis
#17
REVIEW
Shiren Sun, Heng Li, Jianghua Chen, Qi Qian
For decades, lactic acid has been considered a dead-end product of glycolysis. Research in the last 20+ years has shown otherwise. Through its transporters (MCTs) and receptor (GPR81), lactic acid plays a key role in multiple cellular processes, including energy regulation, immune tolerance, memory formation, wound healing, ischemic tissue injury, and cancer growth and metastasis. We summarize key findings of lactic acid signaling, functions, and many remaining questions.
November 2017: Physiology
https://www.readbyqxmd.com/read/29020871/tolerability-and-safety-of-the-intravenous-immunoglobulin-octagam-%C3%A2-10-in-patients-with-immune-thrombocytopenia-a-post-authorisation-safety-analysis-of-two-non-interventional-phase-iv-trials
#18
Stefan Wietek, Daniel Svorc, Anette Debes, Tor-Einar Svae
OBJECTIVES: To provide detailed data on the tolerability and safety of octagam(®) 10%, a ready-to-use intravenous immunoglobulin, in a subgroup of patients with immune thrombocytopenia (ITP) involved in an integrated analysis of post-authorisation safety surveillance (PASS) studies. METHODS: A subgroup analysis was conducted using data collected from two non-interventional studies that included patients with ITP treated with octagam(®) 10%. Patients were observed and monitored for possible adverse drug reactions (ADRs) during or after administration of octagam(®) 10%, with a particular focus on thromboembolic events (TEEs)...
October 11, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29020789/-the-role-of-maternal-imunity-and-woman%C3%A2-s-microbiome-in-the-pathogenesis-of-preterm-labor
#19
M Koucký, K Malíčková, J Hrdý, A Černý, H Hrbáčková, P Šimják, A Pařízek
OBJECTIVE: To summarize available data concerning the role of maternal imunity and woman´s microbiome in the pathogenesis of preterm labor and their use in clinical practice. SETTING: Department of Obstetrics and Gynecology od the First Faculty of Medicine, Charles University in Prague, and General Teaching Hospital. DESIGN: Review article. METHODS: Compilation od published data from scientific literature. CONCLUSION: Preterm labor complicates approximately 10% of all pregnancies and represents a serious medical, social and economic problem...
2017: Ceská Gynekologie
https://www.readbyqxmd.com/read/29019858/epicutaneous-tolerance-induction-to-a-bystander-antigen-abrogates-colitis-and-ileitis-in-mice
#20
David Dunkin, M Cecilia Berin, Lucie Mondoulet, Steven Tobar, Garabet Yeretssian, Leticia Tordesillas, Alina Iuga, Thibaut Larcher, Virginia Guillespie, Pierre-Henri Benhamou, Jean-Frederic Colombel, Hugh A Sampson
BACKGROUND: Although inflammatory bowel disease (IBD) is a failure in maintaining tolerance to the intestinal microbiota, few studies have investigated the use of immunologic tolerance as a treatment approach for IBD. We hypothesized that induction of immune tolerance at a distal site could suppress intestinal inflammation through a process of bystander regulation. METHODS: Epicutaneous tolerance was induced by topical application of ovalbumin (OVA) using a Viaskin patch for 48 hours...
October 9, 2017: Inflammatory Bowel Diseases
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