T-lymphocyte

T-lymphocytes, also known as T cells, are a type of white blood cell that play a central role in cell-mediated immunity. They are named after their maturation place in the thymus.

Types of T-lymphocytes

There are several different types of T-lymphocytes, each with a unique function in the immune response. These include:

• Helper T cells - These cells assist in the immune response by releasing cytokines that stimulate other immune cells.
• Cytotoxic T cells - These cells are capable of killing cells that are infected with viruses or other pathogens.
• Regulatory T cells - These cells help to control the immune response and prevent it from attacking the body's own cells.
• Memory T cells - These cells remember previous encounters with pathogens and can mount a quick response if the same pathogen is encountered again.

Function of T-lymphocytes

T-lymphocytes are essential for the immune response. They are responsible for recognizing and responding to foreign substances (antigens) in the body. When a T cell encounters an antigen, it binds to it and becomes activated. This activation triggers a series of events that lead to the destruction of the antigen.

Role in disease

T-lymphocytes play a role in many diseases. In autoimmune diseases, such as rheumatoid arthritis and type 1 diabetes, T cells mistakenly attack the body's own cells. In other diseases, such as HIV/AIDS, the virus specifically targets T cells, leading to a weakened immune system.

See also

• Immune system
• B-lymphocyte
• Antigen presenting cell
• Immunology

References

T-lymphocyte Resources
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