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Human immunology

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https://www.readbyqxmd.com/read/28644862/high-intensity-corneal-collagen-crosslinking-with-riboflavin-and-uva-in-rat-cornea
#1
Yirui Zhu, Peter S Reinach, Hanlei Zhu, Qiufan Tan, Qinxiang Zheng, Jia Qu, Wei Chen
Corneal collagen cross-linking (CXL) halts human corneal ectasias progression by increasing stromal mechanical stiffness. Although some reports describe that this procedure is effective in dealing with some infectious and immunologic corneal thinning diseases, there is a need for more animal models whose corneal thickness more closely resemble those occurring in these patients. To meet this need, we describe here high-intensity protocols that are safe and effective for obtaining CXL in rat corneas. Initially, a range of potentially effective UVA doses were evaluated based on their effectiveness in increasing tissue enzymatic resistance to dissolution...
2017: PloS One
https://www.readbyqxmd.com/read/28643622/lung-microbiota-and-its-impact-on-the-mucosal-immune-phenotype
#2
Benjamin G Wu, Leopoldo N Segal
The use of culture-independent techniques has allowed us to appreciate that the upper and lower respiratory tract contain a diverse community of microbes in health and disease. Research has only recently explored the effects of the microbiome on the host immune response. The exposure of the human body to the bacterial environment is an important factor for immunological development; thus, the interaction between the microbiome and its host is critical to understanding the pathogenesis of disease. In this article, we discuss the mechanisms that determine the composition of the airway microbiome and its effects on the host immune response...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28643186/current-progress-in-host-innate-and-adaptive-immunity-against-hepatitis-c-virus-infection
#3
REVIEW
Jijing Shi, Yuanyuan Li, Wenxian Chang, Xuexiu Zhang, Fu-Sheng Wang
Hepatitis C virus (HCV) infects more than 170 million people worldwide and is the main cause of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma. Although the newly developed direct-acting antivirals (DAAs) have transformed the treatment of HCV infection, controlling HCV infection on a global scale remains a challenge because of the high cost, low resistance barrier of DAAs and lack of HCV vaccine. The host immune responses associated with HCV infection, especially HCV-specific T cellular immunity, determine the outcome of HCV infection: either acute or chronic infection...
June 22, 2017: Hepatology International
https://www.readbyqxmd.com/read/28642743/hiv-1-nef-signaling-in-intestinal-mucosa-epithelium-suggests-the-existence-of-an-active-inter-kingdom-crosstalk-mediated-by-exosomes
#4
REVIEW
Cristina Felli, Olimpia Vincentini, Marco Silano, Andrea Masotti
The human intestinal mucosal surface represents the first defense against pathogens and regulates the immune response through the combination of epithelial cell (EC) functions and immunological factors. ECs act as sensors of luminal stimuli and interact with the immune cells through signal-transduction pathways, thus representing the first barrier that HIV-1 virus encounters during infection. In particular, the HIV-1 Nef protein plays a crucial role in viral invasion and replication. Nef is expressed early during viral infection and interacts with numerous cellular proteins as a scaffold/adaptor...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28640917/human-hantavirus-infection-elicits-pronounced-redistribution-of-mononuclear-phagocytes-in-peripheral-blood-and-airways
#5
Saskia Scholz, Faezzah Baharom, Gregory Rankin, Kimia T Maleki, Shawon Gupta, Sindhu Vangeti, Jamshid Pourazar, Andrea Discacciati, Jonas Höijer, Matteo Bottai, Niklas K Björkström, Johan Rasmuson, Magnus Evander, Anders Blomberg, Hans-Gustaf Ljunggren, Jonas Klingström, Clas Ahlm, Anna Smed-Sörensen
Hantaviruses infect humans via inhalation of virus-contaminated rodent excreta. Infection can cause severe disease with up to 40% mortality depending on the viral strain. The virus primarily targets the vascular endothelium without direct cytopathic effects. Instead, exaggerated immune responses may inadvertently contribute to disease development. Mononuclear phagocytes (MNPs), including monocytes and dendritic cells (DCs), orchestrate the adaptive immune responses. Since hantaviruses are transmitted via inhalation, studying immunological events in the airways is of importance to understand the processes leading to immunopathogenesis...
June 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28638976/lilrb-receptor-mediated-regulation-of-myeloid-cell-maturation-and-function
#6
REVIEW
William van der Touw, Hui-Ming Chen, Ping-Ying Pan, Shu-Hsia Chen
The leukocyte immunoglobulin-like receptor (LILR) family comprises a set of paired immunomodulatory receptors expressed among human myeloid and lymphocyte cell populations. While six members of LILR subfamily A (LILRA) associate with membrane adaptors to signal via immunoreceptor tyrosine-based activating motifs (ITAM), LILR subfamily B (LILRB) members signal via multiple cytoplasmic immunoreceptor tyrosine-based inhibitory motifs (ITIM). Ligand specificity of some LILR family members has been studied in detail, but new perspective into the immunoregulatory aspects of this receptor family in human myeloid cells has been limited...
June 21, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28638807/translational-rodent-models-for-research-on-parasitic-protozoa-a-review-of-confounders-and-possibilities
#7
REVIEW
Totta Ehret, Francesca Torelli, Christian Klotz, Amy B Pedersen, Frank Seeber
Rodents, in particular Mus musculus, have a long and invaluable history as models for human diseases in biomedical research, although their translational value has been challenged in a number of cases. We provide some examples in which rodents have been suboptimal as models for human biology and discuss confounders which influence experiments and may explain some of the misleading results. Infections of rodents with protozoan parasites are no exception in requiring close consideration upon model choice. We focus on the significant differences between inbred, outbred and wild animals, and the importance of factors such as microbiota, which are gaining attention as crucial variables in infection experiments...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28636882/foxn1-italian-founder-mutation-in-indian-family-implications-in-prenatal-diagnosis
#8
Akella Radha Rama Devi, Nagesh Narayan Panday, Shaik Mohammad Naushad
The Forkhead box N1 (FOXN1) is a transcriptional factor regulating the development, differentiation and function of thymic epithelial cells; maintaining T-lineage progenitors in bone marrow; promoting terminal differentiation of epithelial cells of hair follicles. Mutation in FOXN1 was reported to cause a rare disorder characterized by rudimentary thymus gland, T-cell immunodeficiency, congenital alopecia and nail dystrophy within an Italian community. This is the first report of FOXN1 p.R255X mutation from India, outside this endogamous Italian community...
June 18, 2017: Gene
https://www.readbyqxmd.com/read/28636613/in-vivo-immune-signatures-of-healthy-human-pregnancy-inherently-inflammatory-or-anti-inflammatory
#9
Caroline Graham, Rishma Chooniedass, William P Stefura, Allan B Becker, Malcolm R Sears, Stuart E Turvey, Piush J Mandhane, Padmaja Subbarao, Kent T HayGlass
Changes in maternal innate immunity during healthy human pregnancy are not well understood. Whether basal immune status in vivo is largely unaffected by pregnancy, is constitutively biased towards an inflammatory phenotype (transiently enhancing host defense) or exhibits anti-inflammatory bias (reducing potential responsiveness to the fetus) is unclear. Here, in a longitudinal study of healthy women who gave birth to healthy infants following uncomplicated pregnancies within the Canadian Healthy Infant Longitudinal Development (CHILD) cohort, we test the hypothesis that a progressively altered bias in resting innate immune status develops...
2017: PloS One
https://www.readbyqxmd.com/read/28636546/changes-of-peripheral-lymphocyte-subsets-and-cytokine-environment-during-ageing-and-deteriorating-gastrointestinal-tract-health-status
#10
Jing Wang, Guodong Yang, Dongfang Wang, Kuiliang Liu, Yongchao Ma, Hong Liu, Jing Wu, Min Fang
Human immune senescence accompanies with the physical and physiological frailty. The functional change and shift of NK, NKT and T cell subsets by ageing have been widely studied. However, it remains largely unclear how the ageing and disease conditions affect the distribution of lymphocytes. In the present study, 233 subjects with age range from 20 to 87 year old, including healthy people, people with chronic gastrointestinal tract disease or cancers were investigated. We found that the proportion of NK cells, CD8+ T cells and NKT cells remained relatively unchanged with ageing...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28634033/nickel-sulfate-promotes-il-17a-producing-cd4-t-cells-by-an-il-23-dependent-mechanism-regulated-by-tlr4-and-jak-stat-pathways
#11
Rami Bechara, Diane Antonios, Hayat Azouri, Marc Pallardy
Allergic contact dermatitis, caused by nickel, is a delayed-type hypersensitivity reaction and 14.5% of the general population may be affected in Europe. Among a wide range of cytokines, the IL-12 family has unique structural and immunological characteristics. While IL-12p70 promotes T helper (Th) 1 cells polarization, IL-23 promotes Th17 cells development and both have been isolated from nickel-allergic patients. In this work, we were interested in understanding the mechanism behind nickel-induced Th17 cells development...
June 17, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28633385/timiner-ngs-data-mining-pipeline-for-cancer-immunology-and-immunotherapy
#12
Elias Tappeiner, Francesca Finotello, Pornpimol Charoentong, Clemens Mayer, Dietmar Rieder, Zlatko Trajanoski
Summary: Recently, a number of powerful computational tools for dissecting tumor-immune cell interactions from next-generation sequencing (NGS) data have been developed. However, the assembly of analytical pipelines and execution of multi-step workflows are laborious and involve a large number of intermediate steps with many dependencies and parameter settings. Here we present TIminer, an easy-to-use computational pipeline for mining tumor-immune cell interactions from NGS data. TIminer enables integrative immunogenomic analyses, including: human leukocyte antigens typing, neoantigen prediction, characterization of immune infiltrates, and quantification of tumor immunogenicity...
June 15, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28632936/peritumoral-cuffing-by-t-cell-tumor-infiltrating-lymphocytes-distinguishes-hpv-related-oropharyngeal-squamous-cell-carcinoma-from-oral-cavity-squamous-cell-carcinoma
#13
Kate Poropatich, David Hernandez, Joel Fontanarosa, Koshonna Brown, Gayle Woloschak, Ajit Paintal, Kirtee Raparia, Sandeep Samant
BACKGROUND: It is unclear why human papillomavirus (HPV)-related head and neck squamous cell carcinoma (HNSCC) has improved clinical behavior compared to HPV-negative HNSCC. We sought to better characterize the immune microenvironment of tongue cancers by examining the CD3 and CD8 TIL pattern in HPV-positive and -negative tumors. METHODS: Histologic sections from 40 oral tongue and oropharyngeal cases were analyzed (n= 21 HPV DNA-positive, n= 19 HPV DNA-negative)...
June 20, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28632713/systems-immunology-just-getting-started
#14
REVIEW
Mark M Davis, Cristina M Tato, David Furman
Systems-biology approaches in immunology take various forms, but here we review strategies for measuring a broad swath of immunological functions as a means of discovering previously unknown relationships and phenomena and as a powerful way of understanding the immune system as a whole. This approach has rejuvenated the field of vaccine development and has fostered hope that new ways will be found to combat infectious diseases that have proven refractory to classical approaches. Systems immunology also presents an important new strategy for understanding human immunity directly, taking advantage of the many ways the immune system of humans can be manipulated...
June 20, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28630325/convergent-immunological-solutions-to-argentine-hemorrhagic-fever-virus-neutralization
#15
Antra Zeltina, Stefanie A Krumm, Mehmet Sahin, Weston B Struwe, Karl Harlos, Jack H Nunberg, Max Crispin, Daniel D Pinschewer, Katie J Doores, Thomas A Bowden
Transmission of hemorrhagic fever New World arenaviruses from their rodent reservoirs to human populations poses substantial public health and economic dangers. These zoonotic events are enabled by the specific interaction between the New World arenaviral attachment glycoprotein, GP1, and cell surface human transferrin receptor (hTfR1). Here, we present the structural basis for how a mouse-derived neutralizing antibody (nAb), OD01, disrupts this interaction by targeting the receptor-binding surface of the GP1 glycoprotein from Junín virus (JUNV), a hemorrhagic fever arenavirus endemic in central Argentina...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28630212/a-pilot-study-of-stereotactic-body-radiation-therapy-combined-with-cytoreductive-nephrectomy-for-metastatic-renal-cell-carcinoma
#16
Anurag K Singh, Timothy B Winslow, Mohammad Habiby Kermany, Vincent Goritz, Lilia Heit, Austin Miller, Nicholas C Hoffend, Leighton C Stein, Lalith Kumaraswamy, Graham W Warren, Wiam Bshara, Kunle Odunsi, Junko Matsuzaki, Scott I Abrams, Thomas Schwaab, Jason B Muhitch
<p>While stereotactic body radiation therapy (SBRT) can reduce tumor volumes in metastatic renal cell carcinoma (mRCC) patients, little is known regarding the immunomodulatory effects of high-dose radiation in the tumor microenvironment. The main objectives of this pilot study were to assess the safety and feasibility of nephrectomy following SBRT treatment of mRCC patients and analyze the immunological impact of high-dose radiation.</p> <br /><br />Experimental Design: Human RCC cell lines were irradiated and evaluated for immunomodulation...
June 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28630069/degradation-of-incretins-and-modulation-of-blood-glucose-levels-by-periodontopathic-bacterial-dipeptidyl-peptidase-4
#17
Yuko Ohara-Nemoto, Manami Nakasato, Yu Shimoyama, Tomomi T Baba, Takeshi Kobayakawa, Toshio Ono, Takashi Yaegashi, Shigenobu Kimura, Takayuki K Nemoto
Severe periodontitis is known to aggravate diabetes mellitus, though molecular events related to that link have not been fully elucidated. Porphyromonas gingivalis, a major pathogen of periodontitis, expresses dipeptidyl peptidase 4 (DPP4), which is involved in regulation of blood glucose levels by cleaving incretins in humans. We examined the enzymatic characteristics of DPP4 from P. gingivalis as well as two other periodontopathic bacteria, Tannerella forsythia and Prevotella intermedia, and determined whether it is capable of regulating blood glucose levels...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28629242/differential-effect-of-p38-and-mk2-kinase-inhibitors-on-the-inflammatory-and-toxicity-biomarkers-in-vitro
#18
R K Singh, M Diwan, S G Dastidar, A K Najmi
BACKGROUND: Many inflammatory responses including chemotaxis, production of nitric oxide, and modulation of pro-inflammatory cytokines in immunological cells are mediated by p38MAPK. Due to its pivotal role, p38MAPK has been extensively explored as a molecular target for inhibition of chronic inflammation; however, it has not been successful so far due to serious toxicity issues. Among several downstream substrates of p38, mitogen-activated protein kinase-activated protein kinase 2 (MK2) has been reported to be a direct and essential downstream component in regulation of innate immune and inflammatory responses...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28629124/microbial-diseases-of-bivalve-mollusks-infections-immunology-and-antimicrobial-defense
#19
REVIEW
Carla Zannella, Francesco Mosca, Francesca Mariani, Gianluigi Franci, Veronica Folliero, Marilena Galdiero, Pietro Giorgio Tiscar, Massimiliano Galdiero
A variety of bivalve mollusks (phylum Mollusca, class Bivalvia) constitute a prominent commodity in fisheries and aquacultures, but are also crucial in order to preserve our ecosystem's complexity and function. Bivalve mollusks, such as clams, mussels, oysters and scallops, are relevant bred species, and their global farming maintains a high incremental annual growth rate, representing a considerable proportion of the overall fishery activities. Bivalve mollusks are filter feeders; therefore by filtering a great quantity of water, they may bioaccumulate in their tissues a high number of microorganisms that can be considered infectious for humans and higher vertebrates...
June 17, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28628857/identification-of-b-and-t-cell-epitope-based-peptide-vaccine-from-igf-1-receptor-in-breast-cancer
#20
Manijeh Mahdavi, Violaine Moreau, Majid Kheirollahi
The insulin-like growth factor-1 receptor (IGF-1R) plays a key role in proliferation, growth, differentiation, and development of several human malignancies including breast and pancreatic adenocarcinoma. IGF-1R targeted immunotherapeutic approaches are particularly attractive, as they may potentially elicit even stronger antitumor responses than traditional targeted approaches. Cancer peptide vaccines can produce immunologic responses against cancer cells by triggering helper T cell (Th) or cytotoxic T cells (CTL) in association with Major Histocompatibility Complex (MHC) class I or II molecules on the cell surface of antigen presenting cells...
June 8, 2017: Journal of Molecular Graphics & Modelling
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