Immunophysics

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Immunophysics is a novel interdisciplinary research field using immunological, biological, physical and chemical approaches to elucidate and modify immune-mediated mechanisms and to expand our knowledge on the pathomechanisms of chronic immune-mediated diseases such as arthritis, inflammatory bowel disease, asthma and chronic infections.

Contents

Background

Immune reactions are tightly regulated and usually self-limited. [1] [2] Dysregulation can result in chronic inflammatory diseases (immunochronicity). In addition to biochemical molecular mechanisms, physical factors influence the immune system. Such components include:

The research field of immunophysics aims to investigate the influence of these physicochemical parameters on the function of the immune system in health and disease.

Methods

Immunophysical techniques include nuclear magnetic resonance spectroscopy, magnetic resonance imaging (MRI), dual-energy computed tomography, [13] fluorescence-lifetime imaging microscopy, multispectral optoacoustic tomography (MSOT), high-throughput microfluidic cytometry, [14] interferometric scattering microscopy (iSCAT) and cryogenic optical localization in 3D (COLD).

Applications

Immunophysical research is considered to open new perspectives for the investigation of the pathomechanisms of immune-mediated inflammatory diseases, help to develop novel detection methods and diagnostic tools in these diseases and advance the treatment possibilities of such diseases.

See also

Related Research Articles

<span class="mw-page-title-main">Cell death</span> Biological cell ceasing to carry out its functions

Cell death is the event of a biological cell ceasing to carry out its functions. This may be the result of the natural process of old cells dying and being replaced by new ones, as in programmed cell death, or may result from factors such as diseases, localized injury, or the death of the organism of which the cells are part. Apoptosis or Type I cell-death, and autophagy or Type II cell-death are both forms of programmed cell death, while necrosis is a non-physiological process that occurs as a result of infection or injury.

<span class="mw-page-title-main">Indoleamine 2,3-dioxygenase</span> Mammalian protein found in Homo sapiens

Indoleamine-pyrrole 2,3-dioxygenase (IDO or INDO EC 1.13.11.52) is a heme-containing enzyme physiologically expressed in a number of tissues and cells, such as the small intestine, lungs, female genital tract or placenta. In humans is encoded by the IDO1 gene. IDO is involved in tryptophan metabolism. It is one of three enzymes that catalyze the first and rate-limiting step in the kynurenine pathway, the O2-dependent oxidation of L-tryptophan to N-formylkynurenine, the others being indolamine-2,3-dioxygenase 2 (IDO2) and tryptophan 2,3-dioxygenase (TDO). IDO is an important part of the immune system and plays a part in natural defense against various pathogens. It is produced by the cells in response to inflammation and has an immunosuppressive function because of its ability to limit T-cell function and engage mechanisms of immune tolerance. Emerging evidence suggests that IDO becomes activated during tumor development, helping malignant cells escape eradication by the immune system. Expression of IDO has been described in a number of types of cancer, such as acute myeloid leukemia, ovarian cancer or colorectal cancer. IDO is part of the malignant transformation process and plays a key role in suppressing the anti-tumor immune response in the body, so inhibiting it could increase the effect of chemotherapy as well as other immunotherapeutic protocols.. Furthermore, there is data implicating a role for IDO1 in the modulation of vascular tone in conditions of inflammation via a novel pathway involving singlet oxygen.

<span class="mw-page-title-main">Leukotriene C4</span> Chemical compound

Leukotriene C4 (LTC4) is a leukotriene. LTC4 has been extensively studied in the context of allergy and asthma. In cells of myeloid origin such as mast cells, its biosynthesis is orchestrated by translocation to the nuclear envelope along with co-localization of cytosolic phospholipase A2 (cPLA2), Arachidonate 5-lipoxygenase (5-LO), 5-lipoxygenase-activating protein (FLAP) and LTC4 synthase (LTC4S), which couples glutathione to an LTA4 intermediate. The MRP1 transporter then secretes cytosolic LTC4 and cell surface proteases further metabolize it by sequential cleavage of the γ-glutamyl and glycine residues off its glutathione segment, generating the more stable products LTD4 and LTE4. All three leukotrienes then bind at different affinities to two G-protein coupled receptors: CYSLTR1 and CYSLTR2, triggering pulmonary vasoconstriction and bronchoconstriction.

<span class="mw-page-title-main">Macrophage migration inhibitory factor</span> Protein-coding gene in the species Homo sapiens

Macrophage migration inhibitory factor (MIF), also known as glycosylation-inhibiting factor (GIF), L-dopachrome isomerase, or phenylpyruvate tautomerase is a protein that in humans is encoded by the MIF gene. MIF is an important regulator of innate immunity. The MIF protein superfamily also includes a second member with functionally related properties, the D-dopachrome tautomerase (D-DT). CD74 is a surface receptor for MIF.

T helper 17 cells (Th17) are a subset of pro-inflammatory T helper cells defined by their production of interleukin 17 (IL-17). They are related to T regulatory cells and the signals that cause Th17s to differentiate actually inhibit Treg differentiation. However, Th17s are developmentally distinct from Th1 and Th2 lineages. Th17 cells play an important role in maintaining mucosal barriers and contributing to pathogen clearance at mucosal surfaces; such protective and non-pathogenic Th17 cells have been termed as Treg17 cells.

<span class="mw-page-title-main">Bruce Beutler</span> American immunologist and geneticist

Bruce Alan Beutler is an American immunologist and geneticist. Together with Jules A. Hoffmann, he received one-half of the 2011 Nobel Prize in Physiology or Medicine, for "discoveries concerning the activation of innate immunity." Beutler discovered the long-elusive receptor for lipopolysaccharide. He did so by identifying spontaneous mutations in the gene coding for mouse Toll-like receptor 4 (Tlr4) in two unrelated strains of LPS-refractory mice and proving they were responsible for that phenotype. Subsequently, and chiefly through the work of Shizuo Akira, other TLRs were shown to detect signature molecules of most infectious microbes, in each case triggering an innate immune response.

<span class="mw-page-title-main">TREM1</span> Protein-coding gene in the species Homo sapiens

Triggering receptor expressed on myeloid cells 1 (TREM1) an immunoglobulin (Ig) superfamily transmembrane protein that, in humans, is encoded by the TREM1 gene. TREM1 is constitutively expressed on the surface of peripheral blood monocytes and neutrophils, and upregulated by toll-like receptor (TLR) ligands; activation of TREM1 amplifies immune responses.

<span class="mw-page-title-main">Thymic stromal lymphopoietin</span> Protein-coding gene in the species Homo sapiens

Thymic stromal lymphopoietin (TSLP) is a protein belonging to the cytokine family. It is known to play an important role in the maturation of T cell populations through activation of antigen-presenting cells.

<span class="mw-page-title-main">HAVCR2</span> Protein-coding gene in the species Homo sapiens

Hepatitis A virus cellular receptor 2 (HAVCR2), also known as T-cell immunoglobulin and mucin-domain containing-3 (TIM-3), is a protein that in humans is encoded by the HAVCR2 (TIM-3)gene. HAVCR2 was first described in 2002 as a cell surface molecule expressed on IFNγ producing CD4+ Th1 and CD8+ Tc1 cells. Later, the expression was detected in Th17 cells, regulatory T-cells, and innate immune cells. HAVCR2 receptor is a regulator of the immune response.

<span class="mw-page-title-main">IL17A</span> Protein-coding gene in the species Homo sapiens

Interleukin-17A is a protein that in humans is encoded by the IL17A gene. In rodents, IL-17A used to be referred to as CTLA8, after the similarity with a viral gene.

The inflammatory reflex is a neural circuit that regulates the immune response to injury and invasion. All reflexes have an afferent and efferent arc. The Inflammatory reflex has a sensory afferent arc, which is activated by cytokines, and a motor or efferent arc, which transmits action potentials in the vagus nerve to suppress cytokine production. Increased signaling in the efferent arc inhibits inflammation and prevents organ damage.

The nuocyte is a cell of the innate immune system that plays an important role in type 2 immune responses that are induced in response to helminth worm infection or in conditions such as asthma and atopic disease. Nuocytes are amongst the first cells activated in type 2 immune responses and are thought to play important roles in activating and recruiting other cells types through their production of type 2 cytokines interleukin 4, 5 and 13. Nuocytes have been observed to proliferate in the presence of interleukin 7 (IL-7) in vitro. Nuocytes contribute to the expulsion of helminth worms and to the pathology of colitis and allergic airways disease.

Natural killer T (NKT) cells are a heterogeneous group of T cells that share properties of both T cells and natural killer cells. Many of these cells recognize the non-polymorphic CD1d molecule, an antigen-presenting molecule that binds self and foreign lipids and glycolipids. They constitute only approximately 1% of all peripheral blood T cells. Natural killer T cells should neither be confused with natural killer cells nor killer T cells.

<span class="mw-page-title-main">Akiko Iwasaki</span> Immunobiologist

Akiko Iwasaki is a Sterling Professor of Immunobiology and Molecular, Cellular and Developmental Biology at Yale University. She is also a principal investigator at the Howard Hughes Medical Institute. Her research interests include innate immunity, autophagy, inflammasomes, sexually transmitted infections, herpes simplex virus, human papillomavirus, respiratory virus infections, influenza infection, T cell immunity, commensal bacteria, COVID-19 and Long COVID.

<span class="mw-page-title-main">ILC2</span>

ILC2 cells, or type 2 innate lymphoid cells are a type of innate lymphoid cell. Not to be confused with the ILC. They are derived from common lymphoid progenitor and belong to the lymphoid lineage. These cells lack antigen specific B or T cell receptor because of the lack of recombination activating gene. ILC2s produce type 2 cytokines and are involved in responses to helminths, allergens, some viruses, such as influenza virus and cancer.

In cell biology, TH9 cells are a sub-population of CD4+T cells that produce interleukin-9 (IL-9). They play a role in defense against helminth infections, in allergic responses, in autoimmunity, and tumor suppression.

<span class="mw-page-title-main">Inflammaging</span> Chronic low-grade inflammation that develops with advanced age

Inflammaging is a chronic, sterile low-grade inflammation that develops with advanced age, in the absence of overt infection, and may contribute to clinical manifestations of other age-related pathologies. Inflammaging is thought to be caused by a loss of control over systemic inflammation resulting in chronic, overstimulation of the innate immune system. Inflammaging is a significant risk factor in mortality and morbidity in aged individuals

<span class="mw-page-title-main">Thirumala-Devi Kanneganti</span> Indian immunologist

Thirumala-Devi Kanneganti is an immunologist and is the Rose Marie Thomas Endowed Chair, Vice Chair of the Department of Immunology, and Member at St. Jude Children's Research Hospital. She is also Director of the Center of Excellence in Innate Immunity and Inflammation at St. Jude Children's Research Hospital. Her research interests include investigating fundamental mechanisms of innate immunity, including inflammasomes and inflammatory cell death, PANoptosis, in infectious and inflammatory disease and cancer.

Tania H. Watts is a Canadian Immunologist, Professor at the University of Toronto, past President of the Canadian Society for Immunology and from 2009-2019 held the Sanofi Pasteur Chair in Human Immunology at the University of Toronto. Tania Watts holds a Tier 1 Canada Research Chair in Anti-viral Immunity and was named a Distinguished Fellow of the American Association of Immunologists, class of 2022.

Type 2 inflammation is a pattern of immune response. Its physiological function is to defend the body against helminths, but a dysregulation of the type 2 inflammatory response has been implicated in the pathophysiology of several diseases.

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