Defining Mononuclear Phagocyte Subset Homology Across Several Distant Warm-Blooded Vertebrates Through Comparative...

Area of Science:

• Immunology
• Comparative Genomics
• Cell Biology

Background:

• Mononuclear phagocytes (immune cells) have distinct subsets, well-defined in mice and humans.
• Identifying homologous subsets in other species is crucial for understanding physiology, pathology, and zoonotic diseases.

Purpose of the Study:

• To develop a method for identifying conserved mononuclear phagocyte subsets across diverse vertebrate species.
• To establish universal gene signatures for defining these cell types across species.

Main Methods:

• Combined refined cell sorting with integrated comparative transcriptomics.
• Performed phylogenetic analysis to trace gene conservation.

Main Results:

• Revealed conserved mononuclear phagocyte organization in humans, mice, sheep, pigs, and chickens.
• Identified conserved gene signatures and surface markers for robust cell identification.
• Discovered conserved gene networks regulating cell development and function.
• Found orthologous genes in teleost fishes but not in Lamprey.

Conclusions:

• The developed strategy democratizes omics analyses for cross-species cell type identification.
• Conserved gene signatures provide a universal definition for mononuclear phagocyte subsets.
• Findings advance comparative immunology and disease intervention strategies.