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10:34
Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
Published on: April 23, 2017
Ligand dimensions are important in controlling NK-cell responses
Joanna Brzostek1, Jian-Guo Chai, Friedemann Gebhardt
1Department of Immunology, Wright-Fleming Institute, Imperial College London, London, UK.
European Journal of Immunology
|May 1, 2010
Summary
Ligand size influences natural killer (NK) cell responses. Smaller H60a and H-2K(b) ligands enhance NK cell activation and inhibition, respectively, revealing size-dependent receptor triggering in lymphocytes.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Protein segregation at cell-cell contacts regulates lymphocyte function.
- Ligand size is a potential factor in modulating immune cell responses.
Purpose of the Study:
- To investigate how ligand dimensions affect mouse natural killer (NK) cell activation and inhibition.
- To explore the role of ligand size in NKG2D and Ly49C receptor-mediated signaling.
Main Methods:
- Engineered elongated forms of H60a and H-2K(b) ligands expressed in RMA and CHO cell lines.
- Assessed NK cell lysis, IFN-gamma production, NKG2D binding, and NK-cell target cell conjugate formation.
Main Results:
- Increased H60a ligand size reduced NK cell lysis without affecting NKG2D binding.
- Elongated H-2K(b) ligand decreased inhibition of NK cell lysis and IFN-gamma production.
- Ligand dimensions impact both NK cell activation and inhibition.
Conclusions:
- Small ligand dimensions are crucial for effective NK cell activation and inhibition.
- Mechanisms of receptor triggering may share common features across different lymphocyte types.
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