T-helper cell
those that activate other T cells to achieve cellular inflammatory responses; and those that drive B cells to produce antibodies in the humoral immune response. These two classes of response are generally incompatible with one another and require coordination by substances called cytokines to promote one response while dampening the other.
The HIV virus attacks T-helper cells, knocking out the body’s ability to defend itself against infections.
T-helper cells have CD4 markers on their surface. They are a special subpopulation of CD4 cells. They are also called helper cells and helper T cells.
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- T-suppressor cell
A type of immune cells, also called CD8 cells, these cells close down the immune response after it has destroyed invading organisms. CD8 cells are sensitive to high concentrations of circulating lymphokine hormones and release their own lymphokines after an immune response has achieved its goal, signaling all other participants to cease their attack. Some […]
- T-suppressor cells
T cells that express the CD8 transmembrane glycoprotein (CD8+ T cells). They close down the immune response after invading organisms are destroyed. Suppressor T cells are sensitive to high concentrations of circulating lymphokine hormones, and release their own lymphokines after an immune response has achieved its goal. This signals all other immune-system participants to cease […]
- T-suppressor count
A test that counts the number of T-suppressor (T-8) cells in the bloodstream. It appears that some T-8 cells secrete a substance that can kill the HIV virus, so a high count is believed to be a good indicator for people with HIV (AIDS). See also T- suppressor cells.
- t.i.d. (on prescription)
If a medicine is to be taken every so-many hours, it is written “q_h”; the “q” standing for “quaque” and the “h” indicating the number of hours. So, for example, “2 caps q4h” means “Take 2 capsules every 4 hours.”
- T1-T12 (thoracic vertebrae)
The symbols T1 through T12 represent the 12 thoracic vertebrae. The thoracic vertebrae are situated between the cervical (neck) vertebrae and the lumbar vertebrae. The thoracic vertebrae provide attachment for the ribs and make up part of the back of the thorax (the chest).