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Molecular analysis of human tick-bitten skin yields signatures associated with distinct spatial and temporal trajectories - A proof-of-concept study
Journal article   Open access   Peer reviewed

Molecular analysis of human tick-bitten skin yields signatures associated with distinct spatial and temporal trajectories - A proof-of-concept study

Wenna Lee, Rym Ben-Othman, Patrycja Skut, Amy Huey-Yi Lee, Amanda D. Barbosa, Miles Beaman, Andrew Currie, Nathan T. Harvey, Prasad Kumarasinghe, Roy A. Hall, …
Heliyon, Vol.10(13), e33600
2024
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CC BY-NC-ND V4.0 Open Access

Abstract

Emerging diseases Spatial profiling Spatial transcriptomics Tick-borne diseases Tick-host-pathogen
Tick-associated diseases present challenges due to tridirectional interactions among host-specific responses, tick toxins and salivary proteins as well as microbes. We aimed to uncover molecular mechanisms in tick-bitten skin samples (cases) and contralateral skin samples (controls) collected simultaneously from the same participants, using spatial transcriptomics. Cases and controls analysed using NanoString GeoMx Digital Spatial Profiler identified 274 upregulated and 840 downregulated differentially expressed genes (DEGs), revealing perturbations in keratinization and immune system regulation. Samples of skin biopsies taken within 72 h post tick-bite DEGs had changes in protein metabolism and viral infection pathways as compared to samples taken 3 months post tick-bite, which instead displayed significant perturbations in several epigenetic regulatory pathways, highlighting the temporal nature of the host response following tick bites. Within-individual signatures distinguished tick-bitten samples from controls and identified between-individual signatures, offering promise for future biomarker discovery to guide prognosis and therapy.

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