Characterization of Anopheles gambiae immune cells through genetic and functional immunophenotyping

George-Rafael Samantsidis, Hyeogsun Kwon and Ryan C. Smith ()
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George-Rafael Samantsidis: Iowa State University, Department of Plant Pathology, Entomology and Microbiology
Hyeogsun Kwon: Iowa State University, Department of Plant Pathology, Entomology and Microbiology
Ryan C. Smith: Iowa State University, Department of Plant Pathology, Entomology and Microbiology

Nature Communications, 2025, vol. 16, issue 1, 1-16

Abstract: Abstract Mosquito immune cells, or hemocytes, are integral components of the innate immune responses that define vector competence. To date, the characterization and functional classification of hemocytes has been hindered by the limited availability of genetic resources. Here, we map the composition of mosquito hemocytes by engineering five transgenic Anopheles gambiae lines that express fluorescent proteins under the control of candidate hemocyte promoters. We characterize these five transgenic lines through gene expression and microscopy-based approaches, and examine mosquito immune cell populations by leveraging advanced spectral imaging flow cytometry. We classify mosquito hemocytes into twelve distinct populations based on size, granularity, and ploidy, while defining these hemocyte subtypes based on their phagocytic capacity and the expression of genetic markers. By simultaneously analyzing these morphological and genetic properties, our work highlights the complexity and plasticity of mosquito hemocytes and provides the foundation for deeper investigations into their roles in immunity and pathogen transmission.

Date: 2025
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DOI: 10.1038/s41467-025-65895-6

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