Foxp3 Forkhead Winged Transcription Factor & Mechanisms Of Suppression

foxp3
The intracellular forkhead winged transcription factor Foxp3 (forkhead box P3) appears to be specifically expressed by naturally occurring Treg cells, particularly in mice, although in humans there is evidence of upregulation of Foxp3 in all T cells on activation. Foxp3 is required for the development and function of naturally occurring regulatory t cells (treg) and expression is sufficient to convert non-regulatory CD4+CD25T cells into cells with regulatory activity. Conversion of peripheral CD4+CD25 naive T cells to Foxp3+CD4+CD25 foxp3+ Treg cells can be induced by TGF-ß. In a murine asthma model, these TGF-ß-induced Treg prevented house-dust mite-induced allergic pathogenesis or infection pathogenesis in lungs. A single independent report has suggested that IL-4 and IL-13 also induce Foxp3+CD25+ Treg from CD4+CD25precursors. (more…)

CD4 CD25 Foxp3 Regulatory T Cells (Treg) Markers Occurring

regulatory t cells
Regulatory T cells Treg (picture above) is the existence of suppressor cells, which limit ongoing immune responses and prevent autoimmune disease, was postulated over 30 years ago. The recent phenotypic and functional characterization of these cells has led to a resurgence of interest in their therapeutic application in a number of immune-mediated diseases. Two broad subsets of CD3+CD4+ suppressive or Treg cells have been described: constitutive or naturally occurring versus adaptive or inducible Treg. (more…)

Role of The Immune System to Protect from Infectious Disease

role immune system
The immune system consists of proteins, cells and organs that are concerned with defense of the individual, primarily against the threat of disease caused by infectious organisms. An infectious organism that causes disease is called a pathogen and the individual (person or animal) that is infected by a pathogen is called the host. Not all infectious organisms cause disease and some are actually beneficial, for example bacteria living in the gut help to digest certain foods. Infectious organisms that help the host are called commensalism organisms. (more…)

Allergic Reactions and Autoimmunity - When Immune System Functions Go Wild

immune system functions

Allergic Reactions

For daily life, of course we need our immune system. Without having immune system, we could not survive long, but there are times when the immune system may harm us rather than helps us. If you suffer from sneezing and stuffy nose, watery eyes, every spring or fall, your doctor may assured your hay fever symptoms. These symptoms are allergic reaction to pollen, dust and spores in the air. (more…)