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Published on: December 4, 2020
CD200R1L is a functional evolutionary conserved activating receptor in human neutrophils
M Inês Pascoal Ramos1, Can Keşmir2, Jorn E Stok1
1Center for Translational Immunology, Dept. Immunology, University Medical Center Utrecht, Utrecht University, Oncode Institute, Utrecht, The Netherlands.
CD200R1L, a newly identified activating receptor on human neutrophils, triggers reactive oxygen species (ROS) production. Its evolutionary conservation across vertebrates suggests a vital role in pathogen defense.
Area of Science:
- Immunology
- Molecular Biology
- Evolutionary Biology
Background:
- Immune receptors modulate immune responses and maintain homeostasis.
- The CD200 Receptor (CD200R) gene family includes inhibitory CD200R1 and a putative activating member, CD200R1 Like (CD200R1L).
Purpose of the Study:
- To characterize the function and evolutionary history of CD200R1L.
- To determine if CD200R1L acts as an activating receptor on human neutrophils.
Main Methods:
- Phylogenetic analysis of CD200R gene family.
- Investigated CD200R1L expression and function in human neutrophils.
- Analyzed downstream signaling pathways including Syk, PI3Kβ, PI3Kδ, and Rac GTPase.
Main Results:
- CD200R1L is endogenously expressed by human neutrophils.
- CD200R1L activates neutrophil functions, including reactive oxygen species (ROS) production.
- Phylogenetic analysis reveals CD200R1L's presence across vertebrates and rapid evolution, suggesting convergent evolution and pathogen defense roles.
Conclusions:
- CD200R1L is a novel activating receptor on human neutrophils.
- Its evolutionary conservation and function highlight its importance in host defense against pathogens.
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