CD27 and CD70 in T cell and B cell activation
Jannie Borst1, Jenny Hendriks, Yanling Xiao
1Division of Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands. j.borst@nki.nl
Current Opinion in Immunology
|May 12, 2005
Summary
The CD27-CD70 system is crucial for T and B cell responses, influencing effector and memory cell formation. However, targeting this pathway for therapy requires caution due to potential lethal immunodeficiency from overstimulation.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- The tumor necrosis factor (TNF) receptor superfamily member CD27 acts as a co-stimulatory molecule for T and B lymphocytes.
- CD27's function is regulated by its ligand, CD70, which is transiently expressed on immune cells like lymphocytes and dendritic cells.
Purpose of the Study:
- To investigate the role of the CD27-CD70 signaling pathway in adaptive immunity.
- To explore the implications of modulating CD27-CD70 interactions for therapeutic strategies.
Main Methods:
- In vitro assays to define CD27 co-stimulatory function.
- Genetic and protein-based interventions in mouse models to enforce or abrogate CD27 activity.
- Analysis of effector and memory T cell formation and survival.
Main Results:
- CD27-CD70 interactions are vital for effector and memory T cell development, likely through enhanced cell survival.
- CD27 promotes B cell function, while CD70 exhibits opposing effects and also possesses its own signaling role.
- Constitutive stimulation of CD27 leads to severe immunodeficiency in preclinical models.
Conclusions:
- The CD27-CD70 axis plays a significant role in adaptive immunity, impacting T and B cell populations.
- Targeting CD27-CD70 for therapeutic purposes presents a promising avenue but necessitates careful consideration of potential adverse effects, such as lethal immunodeficiency.
- Understanding the dual roles and complex regulation of CD27 and CD70 is critical for developing safe and effective immunotherapies.
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