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Expression Analysis of Toll-Like Receptor2 in Bubaline
Expression Analysis of Toll-Like Receptor2 in Bubaline

... Keywords: Buffalo, Peripheral blood mononuclear cells, peptidoglycan, TLR2, tolerance . ...
Linköping University Post Print In vitro priming recapitulates in vivo HIV-1
Linköping University Post Print In vitro priming recapitulates in vivo HIV-1

... uninfected individuals. HIV-priming was usually achieved after the third or fourth restimulation, as measured by intracellular IFN-c staining after antigenic rechallenge, (Figure 2B) and considered positive when the level of responding cells, i.e. IFN-c producing T cells, was .1%–5% above the non-sp ...
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... groove, varying the amino acids that can be housed within the peptide-binding pockets. Thus, different HLA alleles possess different peptide-binding repertoires. HLA class I proteins present peptides from intra-cellular proteins (including invasive viruses) to TCR on CD8 (cytotoxic) T cells leading ...
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Nuclear calcium is required for human T cell activation

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Control of Herpes Simplex Virus Type 1 Latency in Human
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... (TCR), as well as selection of T cells with a functional, non-autoreactive TCR, takes place there. After maturation, T cells are released from the thymus and migrate between the bloodstream and lymphatic organs as mature naïve T cells, until they encounter their respective antigen. Activation of T c ...
Department of Immunology, the Wenner-Gren Institute Stockholm University, Stockholm, Sweden Doctoral thesis
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... been reported that phagocytes of Manduca sexta have distinct functions like vertebrate phagocytes. Plasmatocytes are involved in phagocytosis of non-self microsphere beads, whereas granulocytes are involved in phagocytosis of self dead cells [11]. Phagocytosis of a microbe by a phagocytic cell is an ...
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... related to "mast cells" of connective tissue BOTH release Histamine with "IgE" signal antihistamine - blocks the action of Histamine in response to infection or allergic antigen ...
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Plasmacytoid dendritic cells: sensing nucleic acids in viral infection

... TLR-containing early endosomes normally prevents pDC responses to them. However, in some autoimmune diseases, self nucleic acids can be modified by host factors and gain entrance to pDC endosomes, where they activate TLR signalling. Several pDC receptors negatively regulate type I IFN responses by p ...
An integrated model of the recognition of Candida albicans by the
An integrated model of the recognition of Candida albicans by the

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Adaptive immune system



The adaptive immune system, also known as the acquired immune or, more rarely, as the specific immune system, is a subsystem of the overall immune system that is composed of highly specialized, systemic cells and processes that eliminate or prevent pathogen growth. The adaptive immune system is one of the two main immunity strategies found in vertebrates (the other being the innate immune system). Adaptive immunity creates immunological memory after an initial response to a specific pathogen, leads to an enhanced response to subsequent encounters with that pathogen. This process of acquired immunity is the basis of vaccination. Like the innate system, the adaptive system includes both humoral immunity components and cell-mediated immunity components.Unlike the innate immune system, the adaptive immune system is highly specific to a specific pathogen. Adaptive immunity can also provide long-lasting protection: for example; someone who recovers from measles is now protected against measles for their lifetime but in other cases it does not provide lifetime protection: for example; chickenpox. The adaptive system response destroys invading pathogens and any toxic molecules they produce. Sometimes the adaptive system is unable to distinguish foreign molecules, the effects of this may be hayfever, asthma or any other allergies. Antigens are any substances that elicit the adaptive immune response. The cells that carry out the adaptive immune response are white blood cells known as lymphocytes. Two main broad classes—antibody responses and cell mediated immune response—are also carried by two different lymphocytes (B cells and T cells). In antibody responses, B cells are activated to secrete antibodies, which are proteins also known as immunoglobulins. Antibodies travel through the bloodstream and bind to the foreign antigen causing it to inactivate, which does not allow the antigen to bind to the host.In acquired immunity, pathogen-specific receptors are ""acquired"" during the lifetime of the organism (whereas in innate immunity pathogen-specific receptors are already encoded in the germline). The acquired response is called ""adaptive"" because it prepares the body's immune system for future challenges (though it can actually also be maladaptive when it results in autoimmunity).The system is highly adaptable because of somatic hypermutation (a process of accelerated somatic mutations), and V(D)J recombination (an irreversible genetic recombination of antigen receptor gene segments). This mechanism allows a small number of genes to generate a vast number of different antigen receptors, which are then uniquely expressed on each individual lymphocyte. Because the gene rearrangement leads to an irreversible change in the DNA of each cell, all progeny (offspring) of that cell inherit genes that encode the same receptor specificity, including the memory B cells and memory T cells that are the keys to long-lived specific immunity.A theoretical framework explaining the workings of the acquired immune system is provided by immune network theory. This theory, which builds on established concepts of clonal selection, is being applied in the search for an HIV vaccine.
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