Naive T cell
Naive T cell
A Naive T cell (pronounced: nī-ēv tē sel) is a type of T cell that has not yet encountered its specific antigen. These cells are crucial components of the adaptive immune system, which is responsible for the body's specific immune responses.
Etymology
The term "naive" in naive T cell is derived from the Latin word "naivus", meaning "natural" or "innate". This reflects the cell's natural, unaltered state prior to antigen exposure. The "T" in T cell stands for thymus, the organ where these cells mature.
Function
Naive T cells circulate in the lymphatic system, waiting to encounter their specific antigen. Upon antigen encounter, they differentiate into either effector T cells or memory T cells. Effector T cells actively fight off the pathogen, while memory T cells remain in the body long-term to provide immunity against future infections by the same pathogen.
Related Terms
- T cell: A type of white blood cell that is a key component of the immune system.
- Antigen: A substance that triggers an immune response, especially the production of antibodies.
- Adaptive immune system: The part of the immune system that is responsible for the body's specific immune responses.
- Effector T cells: T cells that actively fight off pathogens.
- Memory T cells: T cells that provide long-term immunity against specific pathogens.
- Thymus: An organ located in the chest, where T cells mature.
- Lymphatic system: The network of tissues and organs that help rid the body of toxins, waste and other unwanted materials.
External links
- Medical encyclopedia article on Naive T cell
- Wikipedia's article - Naive T cell
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