Miniature spatial transcriptomics for studying parasite-endosymbiont relationships at the micro scale

Area of Science:

• Parasitology and Microbiology
• Genomics and Molecular Biology
• Spatial Biology

Background:

• Filarial worms cause significant human infectious diseases and depend on endosymbiotic Wolbachia bacteria.
• Understanding the filarial worm-Wolbachia interaction is crucial for disease control, but their spatial relationship is poorly understood.
• Existing methods lack the resolution to study gene expression within these miniature parasitic organisms.

Purpose of the Study:

• To spatially characterize the gene expression patterns in Brugia malayi, a filarial worm, focusing on reproductive tissues.
• To investigate the spatial interaction between the filarial worm and its essential endosymbiont, Wolbachia.
• To demonstrate the utility of miniature spatial transcriptomics for analyzing small biological specimens.

Main Methods:

• Applied miniature Spatial Transcriptomics (ST) to adult female Brugia malayi worms, specifically targeting posterior reproductive regions.
• Performed spatial gene expression profiling to identify tissue-specific patterns and co-localize B. malayi and Wolbachia genes.
• Analyzed spatial transcriptomes under normal conditions and following antibiotic treatment to assess the impact on gene expression.

Main Results:

• Successfully demonstrated proof-of-concept for miniature-ST in resolving spatial gene expression in a small parasitic worm.
• Identified nuanced tissue-specific expression patterns within the Brugia malayi reproductive system.
• Co-localized key B. malayi-Wolbachia pathway genes within specific Wolbachia-enriched tissue regions, showing spatial dependency.

Conclusions:

• Miniature-ST is a powerful tool for uncovering spatial transcriptomic landscapes in micro-scale parasitic organisms.
• This approach provides novel insights into the spatial organization and host-symbiont interactions in filarial worms.
• The findings pave the way for new strategies to study and combat infectious diseases caused by filarial nematodes.