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Negative Regulation of Toll-Like Receptor Signaling by
Negative Regulation of Toll-Like Receptor Signaling by

... was unable to bind to DNA (Fig. 3C) but retained the ability to interact with p65 and Bcl-3 (fig. S5). Ubiquitination of p50Y57A,G60D was dramatically reduced compared with that of WT p50 (Fig. 3D). This was associated with a significant increase in p50Y57A,G60D half-life (Fig. 3E). Taken together, ...
Failure of T cell immunity
Failure of T cell immunity

... always fully representative of the in vivo situation. On the other hand, cells obtained from chronically infected patients show very similar deficiencies compared to the ‘stunned’ T-cells16. These T cells are characterized as exhausted T-cells, signified through their inability to produce effector ...
Pathogenesis - Neisseria.org
Pathogenesis - Neisseria.org

... that they down-regulate adhesion receptors (11). Other viruses such as parainfluenza virus type 2, upregulate several receptors on human tracheal epithelial cells (12). Receptor density, multiple receptor occupancy as well as affinity of microbial ligand interactions with host cell receptors may det ...
030710 Medium- and Large
030710 Medium- and Large

... toxins, drugs, and autoantigens in arteries would qualify, and parvovirus, influenzavirus, varicellavirus, and Chlamydia pneumoniae have been suspected.27-30 Reports of material of infectious origin in temporal arteries have, however, not been corroborated.31,32 The concept that giant-cell arteritis ...
B cell fate following immunization: from memory B cells to plasma cells
B cell fate following immunization: from memory B cells to plasma cells

A Introduction
A Introduction

... in the body. It is a disorder of generalized autoimmunity with unknown etiology, characterized by autoantibody production and immune complex (IC). Patients with SLE produce abnormal antibodies in their blood that target tissues within their own body rather than foreign infectious agents, these antib ...
Antiphospholipid Antibodies: Their Origin and Development
Antiphospholipid Antibodies: Their Origin and Development

... Both studies explicitly do not apply to APS but focus on the presence of aPL only. While no significant association of a genetic locus with anticardiolipin antibodies was detected, several potential loci associated with antibodies against β2GPI were identified. In particular, the apolipoprotien H (A ...
α and L-selectin, but not CD103 or CD34, are IL-7R
α and L-selectin, but not CD103 or CD34, are IL-7R

... and plays key roles in regulating lymphoid development, survival and proliferation [9-11]. L-selectin (CD62L) is constitutively expressed on leukocytes and involved in neutrophil extravasation [12], lymphocyte rolling and migration into lymph nodes [13] and pathology associated with T cell-mediated ...
The Regulatory Role of Invariant NKT Cells in Tumor Immunity
The Regulatory Role of Invariant NKT Cells in Tumor Immunity

... In contrast with conventional T cells, which recognize protein-derived antigens presented by major histocompatibility complex (MHC) class I and class II molecules, the T-cell receptors (TCR) on NKT cells recognize both exogenous and endogenous lipids presented in the context of the nonpolymorphic, M ...
Gene Section ELAVL1 (ELAV (embryonic lethal, abnormal vision,
Gene Section ELAVL1 (ELAV (embryonic lethal, abnormal vision,

... skeletal muscle, is frequently seen in patients with chronic diseases such as cancer. The bioactive gas nitric oxide has been identified as an important player in cancer-induced cachexia because NO is directly involved in the loss of MyoD mRNA (a key factor needed for the myogenic process, which is ...
Immunity to brucellosis
Immunity to brucellosis

... antigen-presenting cells (APCs). Upon activation, they perform pathogen uptake and process the antigenic material into peptides, presenting them in association with major histocompatibility (MHC) class II and I molecules to CD4+ T helper (Th) lymphocytes and CD8+ cytotoxic T lymphocytes (CTLs), resp ...
mRNA Expression and BRAF Mutation in
mRNA Expression and BRAF Mutation in

... Direct RT-PCR analysis of blood permits detection of transcriptome of CTCs. To date, characterization of CTCs for abnormalities in genotypic and mRNA expression has not been well studied in melanoma patients. This situation is due in part to the difficulty of isolating CTCs with monoclonal antibodie ...
Small proportion have immune defect
Small proportion have immune defect

... A brief overview of the normal immune system While discussing immune deficiency disorders, it is useful to briefly review normal immune function. The primary functions of the immune system are to: • recognise self from non self • react to non self (failure results in immune deficiency) • avoid re ...
Emerging Concepts in Effector Biology of Plant
Emerging Concepts in Effector Biology of Plant

The role of Fc–Fc  R interactions in IgG-mediated microbial
The role of Fc–Fc R interactions in IgG-mediated microbial

... the IgG Fc domain, physiologically regulated by the precise composition of the complex biantennary N-linked glycan attached to Asn297, determines whether type I or type II FcRs are engaged by an IgG Fc. IgG Fc domains with a terminal sialic acid attached to the core heptasaccharide conjugated to th ...
New advances in the pathogenesis and treatment of ITP 2014 ASH
New advances in the pathogenesis and treatment of ITP 2014 ASH

... B cell depleting therapy and CD8 Tregs • Results – B cell depletion upregulates CD8+CD25highFoxp3+ T cells and CD8+CD11c+ DC cells. – B cell depletion downregulates CD8+ T cell proliferation. – B cell depletion prevents cell-mediated ITP. ...
ZOOLOGY B.Sc. PART II (HONS.) SYLLABUS
ZOOLOGY B.Sc. PART II (HONS.) SYLLABUS

New Generation Vaccine Adjuvants
New Generation Vaccine Adjuvants

... to stabilize the antigens, and to allow them to be present for extended periods of time. Hence delivery system-based adjuvants often prolong signal 1. Prolongation of signal 1 has also been called a ‘depot effect’. Because delivery systems are particulates with similar dimensions to pathogens, they a ...
UV Irradiation of Skin Regulates a Murine Model of Multiple Sclerosis
UV Irradiation of Skin Regulates a Murine Model of Multiple Sclerosis

... Objective: The prevalence of multiple sclerosis follows a latitude gradient, with increased disease at higher latitudes. Previous studies have focused on a vitamin D hypothesis; although recent evidence suggests that exposure to ultraviolet radiation (UVR) itself may be important. In this study, the ...
T-regulatory cells in ischemic injury.
T-regulatory cells in ischemic injury.

... hours after IRI, PC61 treated mice presented significant worst renal function compared to the group that received IgG. DTA-1 treated animals presented significant protection at the same timepoint, indicating that different subsets of cells can be acting at these timepoints. Furthermore, histopatholo ...
How HIV Causes AIDS
How HIV Causes AIDS

... virus, or cause disease. The protein encoded by nef, for instance, appears necessary for the virus to replicate efficiently, and the vpu-encoded protein influences the release of new virus particles from infected cells. Recently, researchers discovered that Vif (the protein encoded by the vif gene) ...
Title Natural killer cells become tolerogenic after
Title Natural killer cells become tolerogenic after

... and lysis of activated/autoreactive T cells. Apoptotic cells (ACs) have been shown to induce tolerogenic properties of innate immune cells, including macrophages and dendritic cells, but not NK cells. In this study, we demonstrated that after interaction with ACs, NK cells released TGF-β1, which in ...
Mouse and human FcR effector functions
Mouse and human FcR effector functions

... internalization: when mFccRIIB is involved a restricted set of T-cell epitopes is presented compared to when mFccRIII is involved after immune complex internalization, probably due to cell activation concomitantly triggered by the latter receptor through the FcRc chain (28) and the SYK kinase (29). ...
The Antinociceptive Effect of Dexmedetomidine Modulates Spleen
The Antinociceptive Effect of Dexmedetomidine Modulates Spleen

... Results: IP administration of dexmedetomidine significantly decreased the time of licking and biting during the first and second phases of the formalin test (p <0.001). Formalin-induced pain led to higher activity of NK cells than in sham-treated mice (p <0.05), but NK activity was not increased sig ...
View Full Text-PDF
View Full Text-PDF

... Enteric bacteria are normal inhabitants of the intestines of humans and other animals. Sewage contains high numbers of potentially very pathogenic enteric bacteria known as fecal coliforms In their natural habitat enteric bacteria are typically harmless but they can produce severe disease symptoms w ...
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Molecular mimicry

Molecular mimicry is defined as the theoretical possibility that sequence similarities between foreign and self-peptides are sufficient to result in the cross-activation of autoreactive T or B cells by pathogen-derived peptides. Despite the promiscuity of several peptide sequences which can be both foreign and self in nature, a single antibody or TCR (T cell receptor) can be activated by even a few crucial residues which stresses the importance of structural homology in the theory of molecular mimicry. Upon the activation of B or T cells, it is believed that these ""peptide mimic"" specific T or B cells can cross-react with self-epitopes, thus leading to tissue pathology (autoimmunity). Molecular mimicry is a phenomenon that has been just recently discovered as one of several ways in which autoimmunity can be evoked. A molecular mimicking event is, however, more than an epiphenomenon despite its low statistical probability of occurring and these events have serious implications in the onset of many human autoimmune disorders. In the past decade the study of autoimmunity, the failure to recognize self antigens as ""self,"" has grown immensely. Autoimmunity is a result of a loss of immunological tolerance, the ability for an individual to discriminate between self and non-self. Growth in the field of autoimmunity has resulted in more and more frequent diagnosis of autoimmune diseases. Consequently, recent data show that autoimmune diseases affect approximately 1 in 31 people within the general population. Growth has also led to a greater characterization of what autoimmunity is and how it can be studied and treated. With an increased amount of research, there has been tremendous growth in the study of the several different ways in which autoimmunity can occur, one of which is molecular mimicry. The mechanism by which pathogens have evolved, or obtained by chance, similar amino acid sequences or the homologous three-dimensional crystal structure of immunodominant epitopes remains a mystery.
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