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Major histocompatibility complex

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https://www.readbyqxmd.com/read/28429076/-search-for-risk-genes-in-schizophrenia
#1
D Rujescu
BACKGROUND: Schizophrenia is a severe psychiatric disease affecting approximately 0.5-1% of the general population. The relative contribution of genetic factors has been estimated to be 64-81%. OBJECTIVE: This review summarizes recent efforts to identify genetic variants associated with schizophrenia. METHODS: Relevant linkage and candidate genes as well as genome wide association studies, studies on copy number variants and next generation sequencing are presented and discussed...
April 20, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28428787/a-possible-role-for-idiotype-anti-idiotype-b-t-cell-interactions-in-maintaining-immune-memory
#2
Victor I Seledtsov, Galina V Seledtsova
Variable regions of both B-cell receptors (BCRs) and T-cell receptors (TCRs) are completely formed in the postnatal period, and, consequently, no innate immune tolerance against these structures exists in adulthood. Indeed, antibodies (Abs) specific to TCRs have been found in both animals and humans. These facts clearly indicate the existence of B cells able to directly interact with T cells through binding of BCRs to TCRs without implicating major histocompatibility complex molecules. A novel paradigm is proposed in that the immune memory is based on idiotype/anti-idiotype interactions occurring between BCRs and TCRs following clearance of the antigen that elicited immune responses...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28428785/interferon-gamma-induces-changes-in-natural-killer-nk-cell-ligand-expression-and-alters-nk-cell-mediated-lysis-of-pediatric-cancer-cell-lines
#3
Arianexys Aquino-López, Vladimir V Senyukov, Zlatko Vlasic, Eugenie S Kleinerman, Dean A Lee
Natural killer (NK) cells have therapeutic potential for cancer due to their capacity for targeting tumor cells without prior sensitization. Our laboratory has developed an NK cell expansion protocol that generates large quantities of NK cells for therapeutic infusion that secret 20 times the amount of interferon gamma (IFNγ) than resting NK cells. IFNγ can upregulate major histocompatibility complex (MHC)-class I, an inhibitory ligand for NK cells, but can also upregulate intercellular adhesion molecule 1 (ICAM-1) which promotes NK:target cell interaction for an efficient lysis...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28423693/enhanced-anti-tumor-therapeutic-efficacy-of-dna-vaccine-by-fusing-the-e7-gene-to-baff-in-treating-human-papillomavirus-associated-cancer
#4
Chao-Chih Wu, Fang-Cih Wu, Yun-Tin Hsu, Yu-Chia Hsiao, Yuh-Cheng Yang, C Allen Chang, Chih-Long Chang
B-cell-activating factor (BAFF) belongs to the tumor necrosis factor family that not only stimulates B and T cells but also counteracts immune tolerance. BAFF is also a type II membrane protein, which is secreted through the endoplasmic reticulum (ER)-Golgi apparatus pathway. Fusing an antigen to BAFF might enhance the presentation of major histocompatibility complex class I molecules. These characteristics represent an opportunity to enhance the antitumor effects of DNA vaccines. Therefore, we fused BAFF to human papillomavirus type 16 E7 as a DNA vaccine and evaluated its antitumor effects...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419545/intermolecular-interactions-between-dm%C3%AE-and-dm%C3%AE-proteins-in-bula-dm-complex-of-water-buffalo-bubalus-bubalis
#5
Leena Rawal, Deepak Panwar, Sher Ali
The major histocompatibility complex (MHC) with its 3 classes represents a cluster of tightly linked genes with defined immunological and non-immunological functions. The DM, a MHC class II molecule is formed by the non-covalent association of DMα and DMβ chains. It binds with the processed peptide antigens and presents them to T lymphocytes, thereby triggering the immune responses. Startlingly, the expression pattern and structural organization of DMα and DMβ proteins in buffalo remains undefined. We isolated and purified the DMα and DMβ proteins from Bubalus bubalis using gel filtration chromatography...
April 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28419176/mica-diversity-and-linkage-disequilibrium-with-hla-b-alleles-in-renal-transplant-candidates-in-southern-brazil
#6
Roger Haruki Yamakawa, Patrícia Keiko Saito, Geórgia Fernanda Gelmini, José Samuel da Silva, Maria da Graça Bicalho, Sueli Donizete Borelli
The major histocompatibility complex (MHC) class I chain-related gene A (MICA) is located centromerically to the human leukocyte antigen (HLA)-B. The short distance between these loci in the MHC indicates the presence of linkage disequilibrium (LD). Similarly to the HLA, the MICA is highly polymorphic, and this polymorphism has not been well documented in different populations. In this study, we estimated the allelic frequencies of MICA and the linkage disequilibrium with HLA-B alleles in 346 renal-transplant candidates in southern Brazil...
2017: PloS One
https://www.readbyqxmd.com/read/28419155/culture-expanded-allogenic-adipose-tissue-derived-stem-cells-attenuate-cartilage-degeneration-in-an-experimental-rat-osteoarthritis-model
#7
Li Mei, Bojiang Shen, Peixue Ling, Shaoying Liu, Jiajun Xue, Fuyan Liu, Huarong Shao, Jianying Chen, Aibin Ma, Xia Liu
Mesenchymal stem cell (MSC)-based cell therapy is a promising avenue for osteoarthritis (OA) treatment. In the present study, we evaluated the efficacy of intra-articular injections of culture-expanded allogenic adipose tissue-derived stem cells (ADSCs) for the treatment of anterior cruciate ligament transection (ACLT) induced rat OA model. The paracrine effects of major histocompatibility complex (MHC)-unmatched ADSCs on chondrocytes were investigated in vitro. Rats were divided into an OA group that underwent ACLT surgery and a sham-operated group that did not undergo ACLT surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28418931/socs3-treatment-prevents-the-development-of-alopecia-areata-by-inhibiting-cd8-t-cell-mediated-autoimmune-destruction
#8
Zhen Gao, Yu-Qing Jin, Wei Wu
Alopecia areata is one of the most common autoimmune diseases resulting from T cell-mediated damage of hair follicles. CD8+ T cells infiltrate hair follicles and are responsible for destruction of hair follicles. However the underlying mechanisms for hair loss remain still obscure. In the present study, we identified that suppressor of cytokine signaling-3 (SOCS3), a classical inhibitor of cytokine signaling, significantly inhibits CD8+T cell maturation, interferon-γ (IFN-γ) production and alopecia areata...
March 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417619/human-leukocyte-antigen-hla-class-i-and-ii-polymorphism-in-iranian-healthy-population-from-yazd-province
#9
Behrouz Nikbin, Mohammad Hossein Nicknam, Hossein Hadinedoushan, Bita Ansaripour, Batol Moradi, Mirsaeed Yekaninejad, Mahdi Aminikhah, Mohammad Mehdi Ranjbar, Aliakbar Amirzargar
The major histocompatibility complex (MHC) genes are the most polymorphic loci in the human genome and have been widely studied in various populations and ethnic groups. Investigations into the HLA genes and proteins have been useful tool for anthropological, transplantation and disease association studies. The polymorphism of the HLA class I (A, B, C) and class II (DRB1, DQA1, DQB1) genes were investigated in 90 unrelated Iranian individuals from Yazd province located in the center of Iran using sequence-specific primers (PCR-SSP)...
February 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28417047/clinical-significance-of-snp-rs2596542-in-histocompatibility-complex-class-i-related-gene-a-promoter-region-among-hepatitis-c-virus-related-hepatocellular-carcinoma-cases
#10
Amal A Mohamed, Ola M Elsaid, Eman A Amer, Heba H Elosaily, Mohamed I Sleem, Shawkat S Gerges, Mohamed A Saleh, Amal El Shimy, Yasmine S El Abd
The major histocompatibility complex class I-related gene A (MICA) is an antigen induced by stress and performs an integral role in immune responses as an anti-infectious and antitumor agent. This work was designed to investigate whether (SNP) rs2596542C/T in MICA promoter region is predictive of liver cirrhosis (LC) and hepatocellular carcinoma (HCC) or not. Forty-seven healthy controls and 94 HCV-infected patients, subdivided into 47 LC and 47 HCC subjects were enrolled in this study. SNP association was studied using real time PCR and soluble serum MICA concentration was measured using ELISA...
July 2017: Journal of Advanced Research
https://www.readbyqxmd.com/read/28411807/a-sensitive-and-disposable-indium-tin-oxide-based-electrochemical-immunosensor-for-label-free-detection-of-mage-1
#11
Burçak Demirbakan, Mustafa Kemal Sezgintürk
MAGE-1 (MAGE, for melanoma antigen), was identified by virtue of its processing and cell surface expression as a tumor-specific peptide bound to major histocompatibility complexes which was reactive with autolytic T cells. 3-Glycidoxypropyltrimethoxysilane (3-GOPS) is frequently employed for the preparation of dense heterometal hybrid polymers which are used, e.g., for hard coatings of organic polymers and contact lens materials in the optical industry. In this study, we have improved a new immunological biosensor with indium tin oxide (ITO)...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28410296/neoantigen-discovery-in-human-cancers
#12
Elaine R Mardis
Cancer is caused by alterations to DNA that ultimately are translated into altered proteins with unique amino acid sequences when compared with their counterparts in normal cells. By inference, these altered proteins have the potential to elicit immune responses such as T-cell recognition, if properly presented by the immune system following protein degradation and major histocompatibility complex binding. Historically, identifying tumor-specific mutant antigens was painstaking work that involved molecular cloning and immune screening...
March 2017: Cancer Journal
https://www.readbyqxmd.com/read/28407082/genes-and-group-membership-predict-gidgee-skink-egernia-stokesii-reproductive-pairs
#13
Sarah K Pearson, Stephanie S Godfrey, N Schwensow, C Michael Bull, Michael G Gardner
Due to their role in mate choice, disease resistance and kin recognition, genes of the major histocompatibility complex (MHC) are good candidates for investigating genetic-based mate choice. MHC based mate choice is context dependent and influenced by many factors including social structure. Social structure diversity makes the Egernia group of lizards suitable for comparative studies of MHC based mate choice. We investigated mate choice in the gidgee skink (Egernia stokesii), a lizard that exhibits high levels of social group and spatial stability...
April 12, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28406043/cardioprotective-effect-of-magnetic-hydrogel-nanocomposite-loaded-n-%C3%AE-l-rhamnopyranosyl-vincosamide-isolated-from-moringa-oleifera-leaves-against-doxorubicin-induced-cardiac-toxicity-in-rats-in-vitro-and-in-vivo-studies
#14
Mostafa Cheraghi, Mehrdad Namdari, Hadis Daraee, Babak Negahdari, Hammed T Aiyelabegan
Cardioprotective effect of N, α-L-rhamnopyranosyl vincosamide (VR), isolated from the leaves of Moringa oleifera plant in doxorubicin-induced cardiac toxicity rats was evaluated. Twelve (12) rats were randomly selected into 3 groups; 2 rats received distilled water in the control group, 5 rats in group I received varying concentration of VR treatment, and group II containing 5 rats received varying concentration of VR-loaded magnetic hydrogel nanocomposite. Malondialdehyde (MDA), glutathione peroxidase (GSH) and superoxide dismutase (SOD) enzymes activities level were analysed after two weeks...
April 13, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28405010/toll-like-receptor-7-deficiency-protects-apolipoprotein-e-deficient-mice-from-diet-induced-atherosclerosis
#15
Cong-Lin Liu, Marcela M Santos, Cleverson Fernandes, Mengyang Liao, Karine Iamarene, Jin-Ying Zhang, Galina K Sukhova, Guo-Ping Shi
Toll-like receptor 7 (TLR7) mediates autoantigen and viral RNA-induced cytokine production. Increased TLR7 expression in human atherosclerotic lesions suggests its involvement in atherogenesis. Here we demonstrated TLR7 expression in macrophages, smooth muscle cells (SMCs), and endothelial cells from mouse atherosclerotic lesions. To test a direct participation of TLR7 in atherosclerosis, we crossbred TLR7-deficient (Tlr7 (-/-)) mice with apolipoprotein E-deficient (Apoe (-/-)) mice and produced Apoe (-/-) Tlr7 (-/-) and Apoe (-/-) Tlr7 (+/+) littermates, followed by feeding them an atherogenic diet to produce atherosclerosis...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28403532/temozolomide-increases-mhc-i-expression-via-nf-%C3%AE%C2%BAb-signaling-in-glioma-stem-cells
#16
Dongyong Zhang, Bo Qiu, Yunjie Wang, Yanlei Guan, Luyang Zhang, Anhua Wu
Gliomas are the most common and primary tumors of the central nervous system in adults. Temozolomide (TMZ) is the main drug used to treat glioma, however, prognosis remains poor for most patients. Glioma stem cells (GSCs) are thought to enable glioma initiation and evasion from immune surveillance; their immunogenicity can be determined by expression of major histocompatibility complex (MHC)-I. The present study investigated the effect of TMZ on MHC-I expression in GSCs. Glioma spheres were cultured in serum-free medium containing epidermal growth factor, basic fibroblast growth factor, and B27; MHC-I expression was detected by immunocytochemistry, quantitative real-time PCR, and flow cytometry...
April 12, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28402755/distribution-of-fcrn-across-species-and-tissues
#17
Sari Latvala, Bjoern Jacobsen, Michael B Otteneder, Annika Herrmann, Sven Kronenberg
The neonatal Fc receptor (FcRn) is a major histocompatibility complex class I type molecule that binds to, transports, and recycles immunoglobulin G (IgG) and albumin, thereby protecting them from lysosomal degradation. Therefore, besides the knowledge of FcRn affinity, FcRn protein expression is critical in understanding the pharmacokinetic behavior of Fc-containing biotherapeutics such as monoclonal antibodies. The goal of this investigation was to achieve for the first time a comparative assessment of FcRn distribution across a variety of tissues and species...
April 1, 2017: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/28402228/complement-components-are-expressed-by-infiltrating-macrophages-activated-microglia-early-following-viral-infection
#18
Jane E Libbey, Matthew F Cusick, Daniel J Doty, Robert S Fujinami
The individual innate immune components, interleukin-6 and complement component C3, play a role in the development of acute seizures in the Theiler's murine encephalomyelitis virus-induced seizure model. We examined the mRNA expression of various other complement components, cytokines, chemokines, and major histocompatibility complex antigens both within brain and in isolated ramified microglial and infiltrating macrophage/activated microglial cell populations over a time course covering the first 3 days postinfection...
April 12, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28401156/computational-identification-and-characterization-of-a-promiscuous-t-cell-epitope-on-the-extracellular-protein-85b-of-mycobacterium-spp-for-peptide-based-subunit-vaccine-design
#19
Md Saddam Hossain, Abul Kalam Azad, Parveen Afroz Chowdhury, Mamoru Wakayama
Tuberculosis (TB) is a reemerging disease that remains as a leading cause of morbidity and mortality in humans. To identify and characterize a T-cell epitope suitable for vaccine design, we have utilized the Vaxign server to assess all antigenic proteins of Mycobacterium spp. recorded to date in the Protegen database. We found that the extracellular protein 85B displayed the most robust antigenicity among the proteins identified. Computational tools for identifying T-cell epitopes predicted an epitope, 181-QQFIYAGSLSALLDP-195, that could bind to at least 13 major histocompatibility complexes, revealing the promiscuous nature of the epitope...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28396666/dynamic-changes-in-the-intracellular-association-of-selected-rab-small-gtpases-with-mhc-class-ii-and-dm-during-dendritic-cell-maturation
#20
Gibrán Pérez-Montesinos, Orestes López-Ortega, Jessica Piedra-Reyes, Laura C Bonifaz, José Moreno
Antigen processing for presentation by major histocompatibility complex class II (MHCII) molecules requires the latter to travel through the endocytic pathway together with its chaperons: the invariant chain (Ii) and DM. Nevertheless, the nature of the compartments where MHCII molecules travel to acquire peptides lacks definition regarding molecules involved in intracellular vesicular trafficking, such as Rab small GTPases. We aimed to define which Rab proteins are present during the intracellular transport of MHCII, DM, and Ii through the endocytic pathway on their route to the cell surface during dendritic cell (DC) maturation...
2017: Frontiers in Immunology
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