T lymphocytes: Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.
Source: MeSH 2007
These medical condition or symptom topics may be relevant to medical information for T lymphocytes:
T lymphocytes (organ): Another name for T-cells.
T lymphocytes (organ): T cells are one of three types of lymphocytes, a kind of white blood cell. T cells have the ability to recognize antigens and can help to wipe them out. T cells can also provide a "memory" for the develoment of immunity to specific pathogens. T cells are produced in the bone marrow, mature in the thymus. They are present in the blood but are most common in the lymphatic system.
Conditions that can afflict the T cells include leukemia, leukopenia, lymphocytic leukocytosis, lymphocytopenia, HIV, malnutrition, corticosteroid use, chemotherapy, and hereditary immunodeficiency disorders.
T lymphocytes (organ): T-cells or "T lymphocytes" are white blood cells that have a key purpose in the immune system called "cell-mediated immunity". These cells identify and attack any body cells that are infected with viruses or otherwise identified as harmful or "non-self". There are numerous types of T-cells with different purposes ranging from identifying dangers (helper T-cells) to attacking infected cells. T-cells do not produce antibodies; that function is performed by plasma cells (a type of B-cell). Although produced in bone marrow, T-cells migrate to the thymus where they mature into various sub-types with specific purposes.
T lymphocytes (organ): T cells — small white blood cells (also known as T lymphocytes) that direct or directly participate in immune defenses. (Source: excerpt from Microbes in Sickness and in Health - Publications, National Institute of Allergy and Infectious Diseases: NIAID)
a type of lymphocyte. T cells have T-cell receptors and, sometimes, co-stimulatory molecules on their cell surfaces. The T cell helps to orchestrate the immune system and can issue "orders" for other cells to make cytokines and chemokines. (Source: excerpt from Understanding Autoimmune Disease: NIAID)
More information on organs: T-cells:
Source - MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
The following list attempts to classify T lymphocytes into categories where each line is subset of the next.
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