Development of Antisense Tools to Study Bodo saltans and Its Intracellular Symbiont
2025
Mastaneh Ahrar | Lorna Glenn | Marie Held | Andrew Jackson | Krzysztof Kus | Gregory D. D. Hurst | Ewa Chrostek
ABSTRACT Obligate symbioses are common in nature and present a particular challenge for functional genetic analysis. In many cases, the host is a non‐model species with poor tools for genetic manipulation, and the symbiont cannot be cultured or its gene expression manipulated to investigate function. Here, we investigated the potential for using antisense inhibition to analyze host and symbiont gene function within an obligate aquatic symbiosis. We focused on the kinetoplastid host Bodo saltans and its bacterial symbiont, Candidatus Bodocaedibacter vickermanii, a member of Rickettsiales. We conclude that antisense inhibition is not feasible in the Bodo saltans and its symbiont, as the holobiont feeds on the antisense molecules—and increases in numbers—upon treatment with the antisense construct. Although our approach has proven unsuccessful, we have developed an array of protocols that can be used to study the biology of this microeukaryote and its microbial associates.
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