Regulation of ptdins-3-kinase and the guanine nucleotide binding proteins p21^ras during signal transduction by the t cell antigen receptor and the interleukin-2 receptor

TY - JOUR

T1 - Regulation of ptdins-3-kinase and the guanine nucleotide binding proteins p21ras during signal transduction by the t cell antigen receptor and the interleukin-2 receptor

AU - Cantrell, D. A.

AU - Izquierdo, M.

AU - Reif, K.

AU - Woodrow, M.

PY - 1993/10

Y1 - 1993/10

N2 - The T cell antigen receptor (TCR) and the interleukin-2 receptor (IL-2R) are important receptors in haematopoiesis since they control the activation and growth of T lymphocytes, respectively. The term T cell activation refers to the events that occur as T cells progress from the G0 to the G1 phase of the cell cycle and is characterised by the production of a wide range of cytokines and other immunomodulators crucial for the growth and development of other haematopoietic cells. Activation also induces the T cells to express on their cell surface high affinity receptors for various cytokines which enable the T cell to respond to the different cytokines generated during an immune response. One well characterised event that occurs when mature T cells are activated is the production of the cytokine IL-2 and the acquisition by the T cell of high affinity IL-2 receptors. Interaction between IL-2 and its cellular receptor then direct T cell growth. One notable difference between TCR and IL-2R signal transduction is that the TCR regulates intracellular calcium and stimulates protein kinase C whereas the IL-2 receptor does not. The present review focuses on TCR and IL-2R regulation of two common intracellular signalling pathways: the regulation of a PtdIns-3-kinase and the activation of the guanine nucleotide binding proteins p21ras. The aim is to illustrate differences in the mechanisms that couple the TCR and IL-2R to these two signalling pathways and attempt to explain the apparent discrepancy of TCR and IL-2R regulation of shared signal transduction pathways even though these receptors mediate quite distinct biological responses.

AB - The T cell antigen receptor (TCR) and the interleukin-2 receptor (IL-2R) are important receptors in haematopoiesis since they control the activation and growth of T lymphocytes, respectively. The term T cell activation refers to the events that occur as T cells progress from the G0 to the G1 phase of the cell cycle and is characterised by the production of a wide range of cytokines and other immunomodulators crucial for the growth and development of other haematopoietic cells. Activation also induces the T cells to express on their cell surface high affinity receptors for various cytokines which enable the T cell to respond to the different cytokines generated during an immune response. One well characterised event that occurs when mature T cells are activated is the production of the cytokine IL-2 and the acquisition by the T cell of high affinity IL-2 receptors. Interaction between IL-2 and its cellular receptor then direct T cell growth. One notable difference between TCR and IL-2R signal transduction is that the TCR regulates intracellular calcium and stimulates protein kinase C whereas the IL-2 receptor does not. The present review focuses on TCR and IL-2R regulation of two common intracellular signalling pathways: the regulation of a PtdIns-3-kinase and the activation of the guanine nucleotide binding proteins p21ras. The aim is to illustrate differences in the mechanisms that couple the TCR and IL-2R to these two signalling pathways and attempt to explain the apparent discrepancy of TCR and IL-2R regulation of shared signal transduction pathways even though these receptors mediate quite distinct biological responses.

KW - C-raf

KW - Interleukin-2 receptor

KW - MAP kinase

KW - P21

KW - PtdIns-3-kinase

UR - https://www.scopus.com/pages/publications/0027673327

U2 - 10.1006/smim.1993.1038

DO - 10.1006/smim.1993.1038

M3 - Article

C2 - 8260648

AN - SCOPUS:0027673327

SN - 1044-5323

VL - 5

SP - 319

EP - 326

JO - Seminars in Immunology

JF - Seminars in Immunology

IS - 5

ER -