T cell receptor (TCR) signaling in health and disease

Area of Science:

• Immunology
• Molecular Biology
• Cell Signaling

Background:

• T cell activation is initiated by the T cell receptor (TCR) binding to MHC-peptide complexes.
• This interaction triggers intracellular signal transduction pathways, leading to gene activation via transcription factors.
• Signaling cascades involve effector enzymes like kinases, phosphatases, and phospholipases.

Purpose of the Study:

• To provide a comprehensive overview of molecules regulating TCR signaling.
• To discuss the roles of both enzymatic and adaptor proteins in T cell activation.
• To explore the implications of these signaling molecules in human diseases.

Main Methods:

• This review synthesizes existing literature on TCR signaling pathways.
• It focuses on identifying key enzymes and adaptor proteins involved.
• The review also examines the connection between these molecules and human pathologies.

Main Results:

• TCR signaling relies on a network of kinases, phosphatases, and phospholipases.
• Adaptor proteins are essential non-enzymatic scaffolds facilitating protein-protein interactions.
• These components integrate proximal and distal signals for complete T cell activation.

Conclusions:

• Understanding TCR signaling molecules is critical for T cell function.
• Dysregulation of these pathways contributes to various human diseases.
• Further research into these signaling networks may reveal therapeutic targets.