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MHC inflammation

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https://www.readbyqxmd.com/read/29243390/aquaporin-4-blockade-improves-survival-of-murine-heart-allografts-subjected-to-prolonged-cold-ischemia
#1
Katayoun Ayasoufi, Naoki Kohei, Michael Nicosia, Ran Fan, George W Farr, Paul R McGuirk, Marc F Pelletier, Robert L Fairchild, Anna Valujskikh
Prolonged cold ischemia storage (CIS) is a leading risk factor for poor transplant outcome. Existing strategies strive to minimize IRI in transplanted organs, yet there is a need for novel approaches to improve outcomes of marginal allografts and expand the pool of donor organs suitable for transplantation. Aquaporins (AQPs) are a family of water channels that facilitate homeostasis, tissue injury and inflammation. We tested whether inhibition of AQP4 improves the survival of fully MHC-mismatched murine cardiac allografts subjected to 8 h CIS...
December 15, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/29233179/immature-morphological-properties-in-subcellular-scale-structures-in-the-dentate-gyrus-of-schnurri-2-knockout-mice-a-model-for-schizophrenia-and-intellectual-disability
#2
Akito Nakao, Naoyuki Miyazaki, Koji Ohira, Hideo Hagihara, Tsuyoshi Takagi, Nobuteru Usuda, Shunsuke Ishii, Kazuyoshi Murata, Tsuyoshi Miyakawa
Accumulating evidence suggests that subcellular-scale structures such as dendritic spine and mitochondria may be involved in the pathogenesis/pathophysiology of schizophrenia and intellectual disability. Previously, we proposed mice lacking Schnurri-2 (Shn2; also called major histocompatibility complex [MHC]-binding protein 2 [MBP-2], or human immunodeficiency virus type I enhancer binding protein 2 [HIVEP2]) as a schizophrenia and intellectual disability model with mild chronic inflammation. In the mutants' brains, there are increases in C4b and C1q genes, which are considered to mediate synapse elimination during postnatal development...
December 12, 2017: Molecular Brain
https://www.readbyqxmd.com/read/29229678/epitope-mapping-of-serca2a-identifies-an-antigenic-determinant-that-induces-mainly-atrial-myocarditis-in-a-j-mice
#3
Bharathi Krishnan, Chandirasegaran Massilamany, Rakesh H Basavalingappa, Arunakumar Gangaplara, Rajkumar A Rajasekaran, Muhammad Z Afzal, Vahid Khalilzad-Sharghi, You Zhou, Jean-Jack Riethoven, Shyam S Nandi, Paras K Mishra, Raymond A Sobel, Jennifer L Strande, David Steffen, Jay Reddy
Sarcoplasmic/endoplasmic reticulum Ca2+ adenosine triphosphatase (SERCA)2a, a critical regulator of calcium homeostasis, is known to be decreased in heart failure. Patients with myocarditis or dilated cardiomyopathy develop autoantibodies to SERCA2a suggesting that they may have pathogenetic significance. In this report, we describe epitope mapping analysis of SERCA2a in A/J mice that leads us to make five observations: 1) SERCA2a contains multiple T cell epitopes that induce varying degrees of myocarditis...
December 11, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29212956/icam1-neutrophils-promote-chronic-inflammation-via-asprv1-in-b-cell-dependent-autoimmune-encephalomyelitis
#4
Ryder F Whittaker Hawkins, Alexandre Patenaude, Aline Dumas, Rajiv Jain, Yodit Tesfagiorgis, Steven Kerfoot, Takeshi Matsui, Matthias Gunzer, Patrice E Poubelle, Catherine Larochelle, Martin Pelletier, Luc Vallières
Neutrophils contribute to demyelinating autoimmune diseases, yet their phenotype and functions have been elusive to date. Here, we demonstrate that ICAM1 surface expression distinguishes extra- from intravascular neutrophils in the mouse CNS during experimental autoimmune encephalomyelitis (EAE). Transcriptomic analysis of these 2 subpopulations indicated that neutrophils, once extravasated, acquire macrophage-like properties, including the potential for immunostimulation and MHC class II-mediated antigen presentation...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29212808/gestational-age-at-time-of-in-utero-lipopolysaccharide-exposure-influences-the-severity-of-inflammation-induced-diaphragm-weakness-in-lambs
#5
Kanakeswary Karisnan, Tanzila Mahzabin, Anthony J Bakker, Yong Song, Peter B Noble, J Jane Pillow, Gavin Jon Pinniger
The preterm diaphragm is functionally immature compared to its term counterpart. In utero inflammation further exacerbates preterm diaphragm dysfunction. We hypothesized that preterm lambs are more vulnerable to in utero inflammation induced diaphragm dysfunction compared with term lambs. Pregnant ewes received intra-amniotic (IA) injections of saline or 10mg lipopolysaccharide (LPS) 2d or 7d prior to delivery at 121d (preterm) or 145d (term) gestation. Diaphragm contractile function was assessed in vitro. Plasma cytokines and diaphragm myosin heavy chain (MHC) isoforms and oxidative stress were evaluated...
December 6, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29184496/andrographolide-protects-against-aortic-banding-induced-experimental-cardiac-hypertrophy-by-inhibiting-mapks-signaling
#6
Qing Q Wu, Jian Ni, Ning Zhang, Hai H Liao, Qi Z Tang, Wei Deng
Despite therapeutic advances, heart failure-related mortality rates remain high. Therefore, understanding the pathophysiological mechanisms involved in the remodeling process is crucial for the development of new therapeutic strategies. Andrographolide (Andr), a botanical compound, has potent cardio-protective effects due to its ability to inhibit mitogen-activated protein kinases (MAPKs). Andr has also been shown to inhibit inflammation and apoptosis, which are factors related to cardiac hypertrophy. Our aim was to evaluate the effects of Andr on cardiac hypertrophy and MAPKs activation...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29159903/soluble-mhc-molecules-in-immune-regulation-highlighting-class-ii-antigens
#7
REVIEW
Katerina Bakela, Irene Athanassakis
The involvement of Major histocompatibility complex (MHC) antigens in the development and regulation of immune response has been well defined over the years, starting from maturation, antigenic peptide loading, migration to the cell membrane for recognition by the T cell receptor and recycling for immune response cessation. During this intracellular trafficking, MHC antigens find a way to be excreted by the cells, since they can be found as soluble MHC class I (sMHCI) and class II (sMHCII) molecules in all body fluids...
November 21, 2017: Immunology
https://www.readbyqxmd.com/read/29137270/human-mesenchymal-stem-cells-ameliorate-experimental-pulmonary-hypertension-induced-by-maternal-inflammation-and-neonatal-hyperoxia-in-rats
#8
Chung-Ming Chen, Willie Lin, Liang-Ti Huang, Hsiu-Chu Chou
Pulmonary hypertension is a critical problem in infants with bronchopulmonary dysplasia. This study determined the therapeutic effects of human mesenchymal stem cells (MSCs) on pulmonary hypertension in an animal model. Pregnant Sprague-Dawley rats were intraperitoneally injected with lipopolysaccharide (LPS, 0.5 mg/kg/day) on gestational days 20 and 21. The pups were randomly assigned to two treatment conditions: room air (RA) or an O2-enriched atmosphere. On postnatal day 5, they were intratracheally transplanted with human MSCs (3 × 10(5) and 1 × 10(6) cells) in 0...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29132135/increased-th1-th17-responses-contribute-to-low-grade-inflammation-in-age-related-macular-degeneration
#9
Jiajia Chen, Wenzhan Wang, Qiuming Li
BACKGROUND/AIMS: Age-related macular degeneration (AMD) is the primary cause of senior blindness in developed countries. Mechanisms underlying initiation and development of AMD remained known. METHODS: We examined the CD4+ T cell compartments and their functions in AMD patients. RESULTS: AMD patients presented significantly higher frequencies of interferon (IFN)-γ-expressing and interleukin (IL)-17-expressing CD4+ T cells than healthy controls...
November 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29108230/apigenin-enhances-skeletal-muscle-hypertrophy-and-myoblast-differentiation-by-regulating-prmt7
#10
Young Jin Jang, Hyo Jeong Son, Yong Min Choi, Jiyun Ahn, Chang Hwa Jung, Tae Youl Ha
Apigenin, a natural flavone abundant in various plant-derived foods including parsley and celery, has been shown to prevent inflammation and inflammatory diseases. However, the effect of apigenin on skeletal muscle hypertrophy and myogenic differentiation has not previously been elucidated. Here, we investigated the effects of apigenin on quadricep muscle weight and running distance using C57BL/6 mice on an accelerating treadmill. Apigenin stimulated mRNA expression of MHC (myosin heavy chain) 1, MHC2A, and MHC2B in the quadricep muscles of these animals...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29106304/role-of-mait-cells-in-the-immunopathogenesis-of-inflammatory-diseases-new-players-in-old-game
#11
Vijay Kumar, Ali Ahmad
Current advances in immunology have led to the identification of a population of novel innate immune T cells, called mucosa-associated invariant T (MAIT) cells. The cells in humans express an invariant TCRα chain (Vα7.2-Jα33) paired with a limited subset of TCRβ chains (Vβ2, 13 and 22), are restricted by the MHC class I (MH1)-related (MR)-1, and recognize molecules that are produced in the bacterial riboflavin (vitamin B2) biosynthetic pathway. They are present in the circulation, liver and at various mucosal sites (i...
November 6, 2017: International Reviews of Immunology
https://www.readbyqxmd.com/read/29093489/trem-1-promotes-intestinal-tumorigenesis
#12
Leslie Saurer, Daniel Zysset, Silvia Rihs, Lukas Mager, Matteo Gusberti, Cedric Simillion, Alessandro Lugli, Inti Zlobec, Philippe Krebs, Christoph Mueller
Triggering receptor expressed on myeloid cells-1 (TREM-1) is a potent amplifier of pro-inflammatory innate immune responses. Increasing evidence suggests a role for TREM-1 not only in acute pathogen-induced reactions but also in chronic and non-infectious inflammatory disorders, including various types of cancer. Here, we demonstrate that genetic deficiency in Trem1 protects from colorectal cancer. In particular, Trem1 (-/-) mice exhibited reduced tumor numbers and load in an experimental model of inflammation-driven tumorigenesis...
November 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29072876/identification-of-glyceraldehyde-3-phosphate-and-alcohol-dehydrogenases-as-autoantigens-in-doberman-hepatitis
#13
H Dyggve, H Jarva, T Spillmann, M Speeti, S Meri
An autoimmune background is suspected for Doberman hepatitis (DH). It is based on the finding of mononuclear cell infiltrates in the liver, strong female bias, association to the homozygous risk factor dog leucocyte antigen (DLA) allele DRB1*00601 and aberrant major histocompatibility complex (MHC) class II expression on hepatocytes that correlates with the degree of inflammation in the liver. The aim of this study was to search for autoantibodies against liver-related antigens associated with DH. Twenty-five Dobermans with subclinical DH (SDH), 13 that clinically manifest DH (CDH) and 17 healthy controls were studied...
September 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/29050459/third-party-regulatory-t-cells-prevent-murine-acute-graft-versus-host-disease
#14
Jung-Yeon Lim, Keon-Il Im, Yunejin Song, Nayoun Kim, Young-Sun Nam, Young-Woo Jeon, Seok-Goo Cho
Background/Aims: Adoptive therapy with regulatory T (Treg) cells to prevent graft-versus-host disease (GVHD) would benefit from a strategy to improve homing to the sites of inflammation following hematopoietic stem cell transplantation (HSCT). Although donor-derived Treg cells have mainly been used in these models, third-party-derived Treg cells are a promising alternative for cell-based immunotherapy, as they can be screened for pathogens and cell activity, and banked for GVHD prevention...
October 19, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28971270/calcium-calmodulin-dependent-protein-kinase-iv-camkiv-mediates-acute-skeletal-muscle-inflammatory-response
#15
DanDan Shi, RuiCai Gu, YaFeng Song, MaoChao Ding, Tao Huang, MengXia Guo, JiangWei Xiao, WenHua Huang, Hua Liao
The objective of this study is to investigate the role of Calmodulin-dependent protein kinase IV (CaMKIV) in Cardiotoxin (CTX)-induced mice muscle inflammation. CTX injection i.m. was performed to induce B6 mice acute tibialis anterior (TA) muscle injury. The mice were then injected i.p. with the recombinant CaMKIV protein or its antagonist KN-93. Immunoblotting was used to assess Calmodulin (CaM) and CaMKIV levels. Immunofluorescence was used to detect intramuscular infiltration or major histocompatibility complex (MHC)-I expression in damaged muscle...
October 2, 2017: Inflammation
https://www.readbyqxmd.com/read/28970572/schwann-cells-promote-post-traumatic-nerve-inflammation-and-neuropathic-pain-through-mhc-class-ii
#16
Maike Hartlehnert, Angelika Derksen, Tim Hagenacker, David Kindermann, Maria Schäfers, Mathias Pawlak, Bernd C Kieseier, Gerd Meyer Zu Horste
The activation of T helper cells requires antigens to be exposed on the surface of antigen presenting cells (APCs) via MHC class II (MHC-II) molecules. Expression of MHC-II is generally limited to professional APCs, but other cell types can express MHC-II under inflammatory conditions. However, the importance of these conditional APCs is unknown. We and others have previously shown that Schwann cells are potentially conditional APCs, but the functional relevance of MHC-II expression by Schwann cells has not been studied in vivo...
October 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28960101/relb-deficient-dendritic-cells-promote-the-development-of-spontaneous-allergic-airway-inflammation
#17
Prema M Nair, Malcolm R Starkey, Tatt Jhong Haw, Roland Ruscher, Gang Liu, Muralidhara R Maradana, Ranjeny Thomas, Brendan J O'Sullivan, Philip M Hansbro
RATIONALE: RelB is a member of the NF-κB family that is essential for dendritic cell (DC) function and maturation. However, the contribution of RelB to the development of allergic airway inflammation (AAI) is unknown. Here, we identify a pivotal role for RelB in the development of spontaneous AAI, independent of exogenous allergen exposure. METHODS: We assessed AAI in two strains of RelB-deficient ((-/-)) mice, one with a targeted deletion and another mutant expressing an major histocompatibility complex (MHC) transgene...
September 29, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28958395/the-role-of-astrocytes-in-multiple-sclerosis-pathogenesis
#18
J J Guerrero-García
INTRODUCTION: Multiple sclerosis (MS) is a demyelinating autoimmune disease of the central nervous system (CNS), in which astrocytes play an important role as CNS immune cells. However, the activity of astrocytes as antigen-presenting cells (APC) continues to be subject to debate. DEVELOPMENT: This review analyses the existing evidence on the participation of astrocytes in CNS inflammation in MS and on several mechanisms that modify astrocyte activity in the disease...
September 25, 2017: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/28956996/understanding-immune-resistance-to-infectious-bronchitis-using-major-histocompatibility-complex-chicken-lines
#19
A P da Silva, R Hauck, H Zhou, R A Gallardo
Genetic resistance or susceptibility to infectious diseases has been largely associated with the avian major histocompatibility complex (MHC) genes. Our goal was to determine resistance and susceptibility of MHC B haplotype in congenic and inbred chicken lines in order to establish a resistant-susceptible model. Eight congenic lines (253/B18, 254/B15, 330/B21, 312/B24, 331/B2, 335/B19, 336/B21, and 342/BO), two inbred lines (003/B17 and 077/B19), and three commercial lines (white leghorn, brown layers, and broilers) were used in two experiments...
September 2017: Avian Diseases
https://www.readbyqxmd.com/read/28945950/complexity-and-function-of-nkt-cells-with-potential-application-to-hepatic-transplant-survival
#20
REVIEW
Randle Ware, Vipin Kumar
One of the major innate-like lymphocyte populations enriched in liver consists of Natural Killer T (NKT) cells, which recognize self and foreign lipid antigens presented by the non-polymorphic class I MHC-like molecule CD1d. NKT cells express NK cell markers as well as T cell receptors (TCR) and can be classified into 2 categories: type I NKT cells use a semi-invariant TCR whereas type II NKT cells express diverse but still limited TCRs. An emerging body of evidence points to their opposing roles in inflammation, including ischemic reperfusion injury...
September 25, 2017: Liver Transplantation
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