Here's a breakdown:
* Treg cells are a type of T lymphocyte that play a crucial role in maintaining immune tolerance. They prevent the immune system from attacking healthy cells in the body.
* How they work: Treg cells express the transcription factor Foxp3, which is essential for their development and function. They suppress the activity of other immune cells, such as:
* T helper cells (Th cells): They help activate other immune cells to fight infection.
* Cytotoxic T cells (CTLs): They directly kill infected or cancerous cells.
* B cells: They produce antibodies to fight infection.
* Mechanism of suppression: Treg cells use several mechanisms to suppress other immune cells, including:
* Cytokine production: They produce anti-inflammatory cytokines like IL-10 and TGF-beta, which dampen the immune response.
* Cell-cell contact: They can directly interact with other immune cells and deliver inhibitory signals.
* Metabolic modulation: They can alter the metabolic environment to suppress other immune cells.
In summary: Treg cells are essential for maintaining immune homeostasis. They prevent the immune system from attacking healthy cells by inhibiting the activity of other immune cells.
