Treg cells or regulatory T cells constitute a large population of cellular infiltrate in atopic/allergic inflammation and a dysregulated immune response appears to be an important pathogenetic factor. Cardinal events during allergic inflammation can be classified as activation, organ-selective homing, survival and reactivation, and effector functions of immune system cells. T cells are activated by aeroallergens, food antigens, autoantigens, and bacterial exotoxins superantigens in allergic inflammation. They are under the influence of the skin, lung, or nose-related chemokine network and show organ-selective homing. (more…)
Allergen-specific immunotherapy is highly effective in the treatment of IgE-mediated allergy diseases such as rhinitis, conjunc ...
The induction of immune tolerance and specific immune suppression are essential processes in the control of immune responses. R ...
The intracellular forkhead winged transcription factor Foxp3 (forkhead box P3) appears to be specifically expressed by naturall ...
An emerging concept is that pro-inflammatory signals lead to loss of Regulatory T Cells (Treg) function. Pasare and Medzhitov ( ...
Regulatory T cells Treg (picture above) is the existence of suppressor cells, which limit ongoing immune responses and prevent ...
Airway hyper-responsiveness in asthma may involve smooth muscle growth, a manifestation of airway remodelling. The involvement of inflammatory cells in the induction of airway smooth muscle growth was studied in vivo and ex vivo in a brown Norway rat model of asthma. Transfer of CD4 + T lymphocytes from ovalbuminsensitized animals induced an increase in airway smooth muscle mass in naive animals upon repeated ovalbumin challenge. Ex vivo, coculture of antigen-stimulated CD4 + T cells and airway smooth muscle cells led to myocyte proliferation and prolonged T-cell survival. (more…)
Vascular Endothelial Growth Factor (VEGF), originally described as a vascular permeability factor generating tissue oedema, has be ...
Toll-like receptors (TLRs) act as receptors for numerous stimuli of immune cells, including bacterial cell wall constituents (l ...
A role for Leukotriene B4 in the induction of airway hyper-responsiveness was explored through the use of transgenic mice defic ...
IgE plays an important role in allergic asthma. Reducing IgE in the airway mucosa should reduce airway inflammation. Omalizumab has ...
Eosinophil infiltration of the mucosa is a feature of asthmatic airways. Their adhesion to bronchial epithelial cells has been ...
Cells participating in the cellular immune response are organized into discrete associated lymphoid tissues and organs which are spread through the connective tissues of non lymphoid organs. Lymphocyte cell are responsible for the specificity of the cellular immune response. Approximately 2 x 1012 lymphocytes constitute the mature lymphoid system in humans together with a variety of ‘accessory’ cells which include epithelial cells, monocyte or macrophages cells and other antigen-presenting cells. Accessory cells are neede both for the maturation and for the effector cells functions of lymphocytes. (more…)
Airway hyper-responsiveness in asthma may involve smooth muscle growth, a manifestation of airway remodelling. The involvement ...
The process by which blood cells grow, divide, and differentiate in the bone marrow is called hematopoiesis. Three general cl ...
Human body treated all of the food that we ate, either plants or animals, as foreign substances. It is body immune system’s funct ...
Although it is commonly imagined that hematopoiesis takes place in a liquid environment resembling the blood, with progenitors resp ...
Immune system is your body’s defense mechanism to protect from infectious organism and other living object invaded your body. T ...
Acute inflammatory response constitute the first line of defense against infection pathogenesis and how immune system works as well as the initial stage in restoring injured tissue to normalcy. Acute inflammation is recognized by redness, swelling, heat and pain in the affected area. These symptoms stem from a multitude of events taking place within the inflamed site. The humoral arm of the immune response, including circulating antibodies and the complement system, is activated. (more…)
Once it is tethered onto the venule wall, the neutrophil or other leukocyte comes into contact with a wide variety of inflammatory ...
Some of the immediate sequelae of injury are uncomfortably familiar: Soon after an injury occurs, the affected site and its sur ...
Neutrophils make up an army of more-or-less identical circulating phagocytes that are poised to respond quickly and in vast numbers ...
The response to injury usually begins with dilatation of small blood vessels in and around the injured site (figure bellow). Th ...
The airway circulation has many potential roles in asthma. The vasculature has a major influence on upper airway patency in nasal i ...