Abstract
T cell tolerance to self is induced by several mechanisms. Immature T cells may die, and mature T cells may die or be inactivated by contact with self. While we do not understand completely what governs which of these courses will be adopted by an autoreactive T cell, 2 points are clear. Self is in part distinguished from nonself by the fact that the former is always present, while the latter is only intermittently in the body. Secondly, it seems that the default response for T cells is 'off' rather than 'on.' That is, peripheral T cells will become tolerant to antigen unless some other phenomenon such as adjuvant triggers them to respond. One other point should be mentioned. In spite of the power of the mechanisms which causes self tolerance, tolerance is not complete. Autoreactive T cells specific for cryptic antigens, expressed in the brain or eye for example, can easily be demonstrated. Many autoimmune diseases may be caused by aberrant activation and exposure to target organ of these cells, rather than failure of the normal mechanisms of tolerance themselves.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 76S-78S |
| Journal | Chest |
| Volume | 103 |
| Issue number | 2 SUPPL. |
| DOIs | |
| State | Published - Jan 1 1993 |
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ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
- Critical Care and Intensive Care Medicine
- Cardiology and Cardiovascular Medicine
Cite this
T cell tolerance (Giles F. Filley lecture). / Marrack, P.; McCormack, J.; Callahan, J.; Ignatowicz, Leszek; Kappler, J.
In: Chest, Vol. 103, No. 2 SUPPL., 01.01.1993, p. 76S-78S.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - T cell tolerance (Giles F. Filley lecture)
AU - Marrack, P.
AU - McCormack, J.
AU - Callahan, J.
AU - Ignatowicz, Leszek
AU - Kappler, J.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - T cell tolerance to self is induced by several mechanisms. Immature T cells may die, and mature T cells may die or be inactivated by contact with self. While we do not understand completely what governs which of these courses will be adopted by an autoreactive T cell, 2 points are clear. Self is in part distinguished from nonself by the fact that the former is always present, while the latter is only intermittently in the body. Secondly, it seems that the default response for T cells is 'off' rather than 'on.' That is, peripheral T cells will become tolerant to antigen unless some other phenomenon such as adjuvant triggers them to respond. One other point should be mentioned. In spite of the power of the mechanisms which causes self tolerance, tolerance is not complete. Autoreactive T cells specific for cryptic antigens, expressed in the brain or eye for example, can easily be demonstrated. Many autoimmune diseases may be caused by aberrant activation and exposure to target organ of these cells, rather than failure of the normal mechanisms of tolerance themselves.
AB - T cell tolerance to self is induced by several mechanisms. Immature T cells may die, and mature T cells may die or be inactivated by contact with self. While we do not understand completely what governs which of these courses will be adopted by an autoreactive T cell, 2 points are clear. Self is in part distinguished from nonself by the fact that the former is always present, while the latter is only intermittently in the body. Secondly, it seems that the default response for T cells is 'off' rather than 'on.' That is, peripheral T cells will become tolerant to antigen unless some other phenomenon such as adjuvant triggers them to respond. One other point should be mentioned. In spite of the power of the mechanisms which causes self tolerance, tolerance is not complete. Autoreactive T cells specific for cryptic antigens, expressed in the brain or eye for example, can easily be demonstrated. Many autoimmune diseases may be caused by aberrant activation and exposure to target organ of these cells, rather than failure of the normal mechanisms of tolerance themselves.
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U2 - 10.1378/chest.103.2.76S
DO - 10.1378/chest.103.2.76S
M3 - Article
VL - 103
SP - 76S-78S
JO - Chest
JF - Chest
SN - 0012-3692
IS - 2 SUPPL.
ER -