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Updated: Jul 24, 2025
07:21
Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing
Published on: August 25, 2018
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PERK-mediated antioxidant response is key for pathogen persistence in ticks
Kristin L Rosche1, Joanna Hurtado1,2, Elis A Fisk1
1Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, USA.
Biorxiv : the Preprint Server for Biology
|July 3, 2023
Summary
Tick-borne pathogens like Lyme disease bacteria and granulocytic anaplasmosis bacteria hijack the tick
Area of Science:
- Tick-borne pathogen persistence
- Vector-pathogen interactions
- Tick cellular immunity
Background:
- Pathogen survival within arthropod vectors is critical for transmission.
- Tick immune responses are key regulators of pathogen colonization.
- Mechanisms enabling pathogen persistence against tick immunity are largely unknown.
Approach:
- Investigated the role of the PERK/eIF2α cellular stress pathway in *Ixodes scapularis*.
- Utilized pharmacological inhibition and RNA interference (RNAi) to target the PERK pathway.
- Examined the Nrf2 antioxidant response regulator and reactive oxygen/nitrogen species.
Key Points:
- *Borrelia burgdorferi* and *Anaplasma phagocytophilum* activate the tick PERK pathway.
- Inhibiting the PERK pathway reduced microbial load in larvae and during molting.
- Pathogens induce Nrf2 activity, which is crucial for antioxidant defense.
- PERK pathway activation creates an antioxidant environment supporting pathogen survival.
Conclusions:
- The *Ixodes* PERK pathway is a critical host factor exploited by tick-borne pathogens.
- PERK-mediated Nrf2 activation facilitates pathogen persistence by managing oxidative stress.
- Targeting this pathway could offer novel strategies to control pathogen transmission by ticks.
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