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[Involvement of semaphorins in immunoregulation]
Masayuki Mizui1, Atsushi Kumanogoh
1Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.
Summary
Semaphorins, initially known for nerve guidance, are now recognized for crucial roles in immune responses. These immunoregulatory semaphorins offer potential targets for modulating immune activity.
Area of Science:
- Molecular biology
- Immunology
- Neuroscience
Context:
- Semaphorins were initially identified as axonal guidance cues in neuronal development.
- Emerging evidence highlights significant roles for semaphorins within the immune system.
- Specific semaphorins like Sema4D and Sema4A demonstrate key functions in immune cell activation and regulation.
Purpose:
- To review the emerging roles of semaphorins in immune regulation.
- To explore semaphorins as potential therapeutic targets for immune modulation.
- To consolidate current knowledge on immunoregulatory semaphorins.
Summary:
- Semaphorins are increasingly recognized for their functions beyond neurodevelopment, particularly in immune processes.
- Sema4D (CD100) facilitates B cell and dendritic cell activation via its receptor CD72.
- Sema4A plays a vital role in T cell priming and the regulation of T helper cell subsets (Th1/Th2).
Impact:
- Identifies semaphorins as key players in immune system function.
- Suggests semaphorins as novel targets for enhancing or intervening in immune responses.
- Provides a foundation for future research into semaphorin-based immunotherapies.