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Adaptive immune system

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https://www.readbyqxmd.com/read/27925695/integrated-biomarker-profiling-of-smokers-with-periodontitis
#1
Radhakrishnan Nagarajan, Mohanad Al-Sabbagh, Dolph Dawson, Jeffrey Ebersole
: In the context of precision medicine, understanding patient-specific variation is an important step in developing targeted and patient-tailored treatment regimens for periodontitis. While several studies have successfully demonstrated the usefulness of molecular expression profiling in conjunction with single classifier systems in discerning distinct disease groups, the majority of these studies do not provide sufficient insights into potential variations within the disease groups. AIM: The goal of the present study is to discern biological response profiles of periodontitis and non-periodontitis smoking subjects using an informed panel of biomarkers across multiple scales (salivary, oral microbiome, pathogens and other markers)...
December 7, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27925500/current-understandings-on-plant-nonhost-resistance
#2
Hyun-Ah Lee, Hye-Young Lee, Eunyoung Seo, Joohyun Lee, Saet-Byul Kim, SooHyun Oh, Eunbi Choi, Eunhye Choi, So Eui Lee, Doil Choi
Nonhost resistance, a resistance of plant species against all non-adapted pathogens, is considered the most durable and efficient immune system of plants but yet remains elusive. The underlying mechanism of nonhost resistance has been investigated at multiple levels of plant defense for several decades. In this review, we have comprehensively surveyed the latest literature on nonhost resistance in terms of pre-invasion, metabolic defense, pattern-triggered immunity, effector-triggered immunity, defense signaling, and possible application in crop protection...
December 7, 2016: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27924081/liver-guardian-modifier-and-target-of-sepsis
#3
REVIEW
Pavel Strnad, Frank Tacke, Alexander Koch, Christian Trautwein
Sepsis and septic shock are characterized by life-threatening organ dysfunction caused by a dysregulated host response to infection. The liver has a central role during sepsis, and is essential to the regulation of immune defence during systemic infections by mechanisms such as bacterial clearance, acute-phase protein or cytokine production and metabolic adaptation to inflammation. However, the liver is also a target for sepsis-related injury, including hypoxic hepatitis due to ischaemia and shock, cholestasis due to altered bile metabolism, hepatocellular injury due to drug toxicity or overwhelming inflammation, as well as distinct pathologies such as secondary sclerosing cholangitis in critically ill patients...
December 7, 2016: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27923767/mitochondria-as-molecular-platforms-integrating-multiple-innate-immune-signalings
#4
REVIEW
Marie Monlun, Caroline Hyernard, Patrick Blanco, Lydia Lartigue, Benjamin Faustin
The immune system of vertebrates confers protective mechanisms to the host through the sensing of stress-induced agents expressed during infection or cell stress. Among them, the first line of host defense composed of the innate immune sensing of these agents by pattern recognition receptors enables downstream adaptive immunity to be primed, mediating the body's appropriate response to clear infection and tissue damage. Mitochondria are «bacteria within» that allowed the emergence of functional eukaryotic cells by positioning themselves as the cell powerhouse and an initiator of cell death programs...
October 27, 2016: Journal of Molecular Biology
https://www.readbyqxmd.com/read/27922139/are-low-sun-exposure-and-or-vitamin-d-risk-factors-for-type-1-diabetes
#5
K M Miller, P H Hart, N H de Klerk, E A Davis, R M Lucas
The global variation in type 1 diabetes (T1D) incidence rates is one of the most significant observed for any non-communicable disease. Geographical patterns in incidence suggest that low sun exposure may contribute to the wide disparity, with incidence rates generally increasing with distance from the Equator. T1D development is associated with hyperactivity of the adaptive immune system leading to autoimmune destruction of insulin-secreting pancreatic β cells. Both exposure to ultraviolet radiation (UVR) and vitamin D, with their known immunosuppressive effects, have the potential to delay or inhibit the disease...
December 6, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27921293/coloniality-and-migration-are-related-to-selection-on-mhc-genes-in-birds
#6
Piotr Minias, Linda A Whittingham, Peter O Dunn
The Major Histocompatibility Complex (MHC) plays a key role in pathogen recognition as a part of vertebrate adaptive immune system. The great diversity of MHC genes in natural populations is maintained by different forms of balancing selection and its strength should correlate with the diversity of pathogens to which a population is exposed and the rate of exposure. Despite this prediction, little is known about how the life-history characteristics affect selection at the MHC. Here, we examined whether the strength of balancing selection on MHC class II genes in birds (as measured with nonsynonymous nucleotide substitutions, dN) was related to their social or migratory behaviour, two life-history characteristics correlated with pathogen exposure...
December 6, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27920759/immune-responses-to-influenza-virus-and-its-correlation-to-age-and-inherited-factors
#7
REVIEW
Azadeh Bahadoran, Sau H Lee, Seok M Wang, Rishya Manikam, Jayakumar Rajarajeswaran, Chandramathi S Raju, Shamala D Sekaran
Influenza viruses belong to the family Orthomyxoviridae of enveloped viruses and are an important cause of respiratory infections worldwide. The influenza virus is able to infect a wide variety species as diverse as poultry, marine, pigs, horses, and humans. Upon infection with influenza virus the innate immunity plays a critical role in efficient and rapid control of viral infections as well as in adaptive immunity initiation. The humoral immune system produces antibodies against different influenza antigens, of which the HA-specific antibody is the most important for neutralization of the virus and thus prevention of illness...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27920756/salmonella-typhimurium-and-multidirectional-communication-in-the-gut
#8
REVIEW
Elena V Gart, Jan S Suchodolski, Thomas H Welsh, Robert C Alaniz, Ronald D Randel, Sara D Lawhon
The mammalian digestive tract is home to trillions of microbes, including bacteria, archaea, protozoa, fungi, and viruses. In monogastric mammals the stomach and small intestine harbor diverse bacterial populations but are typically less populated than the colon. The gut bacterial community (microbiota hereafter) varies widely among different host species and individuals within a species. It is influenced by season of the year, age of the host, stress and disease. Ideally, the host and microbiota benefit each other...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27920208/genetic-modification-of-er-hoxb8-osteoclast-precursors-using-crispr-cas9-as-a-novel-way-to-allow-studies-on-osteoclast-biology
#9
Irene Di Ceglie, Guus G H van den Akker, Giuliana Ascone, Bas Ten Harkel, Hans Häcker, Fons A J van de Loo, Marije I Koenders, Peter M van der Kraan, Teun J de Vries, Thomas Vogl, Johannes Roth, Peter L E M van Lent
Osteoclasts are cells specialized in bone resorption. Currently, studies on murine osteoclasts are primarily performed on bone marrow-derived cells with the use of many animals and limited cells available. ER-Hoxb8 cells are conditionally immortalized monocyte/macrophage murine progenitor cells, recently described to be able to differentiate toward functional osteoclasts. Here, we produced an ER-Hoxb8 clonal cell line from C57BL/6 bone marrow cells that strongly resembles phenotype and function of the conventional bone marrow-derived osteoclasts...
December 5, 2016: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/27919436/complement-in-basic-processes-of-the-cell
#10
Anaïs Jiménez-Reinoso, Ana V Marin, José R Regueiro
The complement system is reemerging in the last few years not only as key element of innate immunity against pathogens, but also as a main regulator of local adaptive responses, affecting dendritic cells as well as T and B lymphocytes. We review data showing that leucocytes are capable of significant autocrine synthesis of complement proteins, and express a large range of complement receptors, which in turn regulate their differentiation and effector functions while cross talking with other innate receptors such as Toll-like receptors...
December 2, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27918843/cucurbita-ficifolia-cucurbitaceae-modulates-inflammatory-cytokines-and-ifn-%C3%AE-in-obese-mice
#11
Á Fortis-Barrera, R García-Macedo, J C Almanza-Perez, G Blancas-Flores, A Zamilpa-Alvarez, J L Flores-Sáenz, M Cruz, R Román-Ramos, F J Alarcón-Aguilar
This study investigated the effect of aqueous extract of Cucurbita ficifolia Bouché on systemic chronic inflammation in an obesity model induced by monosodium glutamate (MSG) via modulating the expression of adipokines (TNF-α, IL-6, resistin, and adiponectin) and immune-regulatory cytokines (IFN-γ and IL-10). Cucurbita ficifolia extract was administered daily by gavage to lean and MSG-obese mice for 30 days. At the end of treatment, cytokine mRNA expression in adipose tissue was determined by real-time polymerase chain reaction (PCR), and the protein levels of these cytokines were also quantified by enzyme-linked immunosorbent assay (ELISA)...
September 19, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/27918526/mycobacterium-tuberculosis-esxh-inhibits-escrt-dependent-cd4-t-cell-activation
#12
Cynthia Portal-Celhay, JoAnn M Tufariello, Smita Srivastava, Aleena Zahra, Thais Klevorn, Patricia S Grace, Alka Mehra, Heidi S Park, Joel D Ernst, William R Jacobs, Jennifer A Philips
Mycobacterium tuberculosis (Mtb) establishes a persistent infection, despite inducing antigen-specific T-cell responses. Although T cells arrive at the site of infection, they do not provide sterilizing immunity. The molecular basis of how Mtb impairs T-cell function is not clear. Mtb has been reported to block major histocompatibility complex class II (MHC-II) antigen presentation; however, no bacterial effector or host-cell target mediating this effect has been identified. We recently found that Mtb EsxH, which is secreted by the Esx-3 type VII secretion system, directly inhibits the endosomal sorting complex required for transport (ESCRT) machinery...
December 5, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27918080/the-hemileia-vastatrix-effector-hvec-016-suppresses-bacterial-blight-symptoms-in-coffee-genotypes-with-the-sh-1-rust-resistance-gene
#13
Thiago Maia, Jorge L Badel, Gustavo Marin-Ramirez, Cynthia de M Rocha, Michelle B Fernandes, José C F da Silva, Gilson M de Azevedo-Junior, Sérgio H Brommonschenkel
A number of genes that confer resistance to coffee leaf rust (SH 1-SH 9) have been identified within the genus Coffea, but despite many years of research on this pathosystem, the complementary avirulence genes of Hemileia vastatrix have not been reported. After identification of H. vastatrix effector candidate genes (HvECs) expressed at different stages of its lifecycle, we established an assay to characterize HvEC proteins by delivering them into coffee cells via the type-three secretion system (T3SS) of Pseudomonas syringae pv...
December 5, 2016: New Phytologist
https://www.readbyqxmd.com/read/27917637/-cardiovascular-risk-in-rheumatic-diseases
#14
Sabína Oreská, Michal Tomčík
Cardiovascular diseases, as a result of atherosclerosis, are the leading cause of mortality in the world. Atherosclerosis used to be considered as a degenerative impairment of the artery wall. Nevertheless, it is presently rather regarded as an autoimmune process with the involvement of both innate and adaptive immunity. Recently, it was demonstrated that the cardiovascular risk is increased in autoimmune diseases.In the pathogenesis of atherosclerosis in chronic inflammatory diseases both traditional and non-traditional risk factors are important...
2016: Casopís Lékar̆ů C̆eských
https://www.readbyqxmd.com/read/27917401/aao-autoimmune-and-autoinflammatory-disease-in-otology-what-is-new-in-immune-mediated-hearing-loss
#15
REVIEW
Andrea Vambutas, Shresh Pathak
OBJECTIVES: Autoinflammatory diseases are a family of immune-mediated, rare diseases, some of which, exhibit sensorineural hearing loss (SNHL), suggesting potentially similar mechanisms of molecular pathogenesis between autoinflammatory-mediated hearing loss and autoimmune inner ear disease (AIED) may exist. The purpose of this review is to compare the clinical features of autoimmune and autoinflammatory diseases that affect hearing, discuss the limitations of our knowledge, and highlight potential new disease mechanisms and therapeutics...
October 2016: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/27917204/modulation-of-immune-cells-and-th1-th2-cytokines-in-insulin-treated-type-2-diabetes-mellitus
#16
Magloire Pandoua Nekoua, Rufine Fachinan, Amidou K Atchamou, Odilon Nouatin, Daniel Amoussou-Guenou, Marcellin K Amoussou-Guenou, Kabirou Moutairou, Akadiri Yessoufou
BACKGROUND: The role of the immune system in insulin resistance associated with type 2 diabetes has been suggested. OBJECTIVES: We assessed the profile of Th1/Th2 cytokines along with the frequencies of immune cells in insulin-treated type 2 diabetic patients (T2DP). METHODS: 45 T2D patients and 43 age-matched healthy subjects were selected. Serum concentrations of T-helper type 1 (Th1) and Th2 cytokines and the frequencies of innate and adaptive immunity cells were assessed...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27916659/stronger-hypothalamus-pituitary-adrenal-axis-habituation-predicts-lesser-sensitization-of-inflammatory-response-to-repeated-acute-stress-exposures-in-healthy-young-adults
#17
Myriam V Thoma, Danielle Gianferante, Luke Hanlin, Alexander Fiksdal, Chen Xuejie, Nicolas Rohleder
Effective adjustment of the stress systems to repeated stress is regarded as an adaptive response of the organism facing environmental threats. Given the intertwined relationship between the stress systems and the inflammatory system, it could be expected that inflammatory processes should adapt to repeated stress as well. However, only little is known about adaptational processes of the different components of the immune system in response to repeated stress, and how these might be related to adaptational processes of the hypothalamus-pituitary-adrenal (HPA) axis...
December 1, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27916599/deciphering-communicating-and-engineering-the-crispr-pam
#18
REVIEW
Ryan T Leenay, Chase L Beisel
Clustered regularly interspaced short palindromic repeat (CRISPR) loci and their flanking CRISPR-associated (cas) genes make up RNA-guided, adaptive immune systems in prokaryotes whose effector proteins have become powerful tools for basic research and biotechnology. While the Cas effector proteins are remarkably diverse, they commonly rely on protospacer-adjacent motifs (PAMs) as the first step in target recognition. PAM sequences are known to vary considerably between systems and have proven to be difficult to predict, spurring the need for new tools to rapidly identify and communicate these sequences...
December 1, 2016: Journal of Molecular Biology
https://www.readbyqxmd.com/read/27916375/the-role-of-the-adaptive-immune-system-in-burn-induced-heterotopic-ossification-and-mesenchymal-cell-osteogenic-differentiation
#19
Kavitha Ranganathan, Shailesh Agarwal, David Cholok, Shawn Loder, Jonathan Li, Hsiao Hsin Sung Hsieh, Stewart C Wang, Steven R Buchman, Benjamin Levi
BACKGROUND: Heterotopic ossification (HO) is the pathologic process of extraskeletal bone formation. Although the exact etiology remains unknown, inflammation appears to catalyze disease progression. The goal of this study is to determine the impact of the adaptive immune system on HO. METHODS: HO was induced in 8-wk-old control C57BL/6 and immunocompromised Rag1tm1Mom (Rag1 KO) male mice deficient in B- and T-lymphocytes via combined Achilles tenotomy and burn injury...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27916272/regulation-and-function-of-anaphylatoxins-and-their-receptors-in-allergic-asthma
#20
Yves Laumonnier, Anna V Wiese, Julia Figge, Christian Karsten
Allergic asthma is a disease of the airways driven by maladaptive T helper 2 (Th2) and Th17 immune response against harmless, airborne substances. The hallmarks of this disease are airway hyperresponsiveness (AHR), eosinophilic and neutrophilic airway inflammation and mucus overproduction. Distinct dendric cell (DC) subsets together with airway epithelial and pulmonary vascular endothelial cells play critical roles in allergen sensing and in driving T cell differentiation towards Th2 and Th17 effector or regulatory T cells (Treg)...
December 1, 2016: Molecular Immunology
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