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Review
. 2022 Jun 25;11(7):1254.
doi: 10.3390/antiox11071254.

Ambivalent Roles of Oxidative Stress in Triangular Relationships among Arthropod Vectors, Pathogens and Hosts

Affiliations
Review

Ambivalent Roles of Oxidative Stress in Triangular Relationships among Arthropod Vectors, Pathogens and Hosts

Emmanuel Pacia Hernandez et al. Antioxidants (Basel). .

Abstract

Blood-feeding arthropods, particularly ticks and mosquitoes are considered the most important vectors of arthropod-borne diseases affecting humans and animals. While feeding on blood meals, arthropods are exposed to high levels of reactive oxygen species (ROS) since heme and other blood components can induce oxidative stress. Different ROS have important roles in interactions among the pathogens, vectors, and hosts. ROS influence various metabolic processes of the arthropods and some have detrimental effects. In this review, we investigate the various roles of ROS in these arthropods, including their innate immunity and the homeostasis of their microbiomes, that is, how ROS are utilized to maintain the balance between the natural microbiota and potential pathogens. We elucidate the mechanism of how ROS are utilized to fight off invading pathogens and how the arthropod-borne pathogens use the arthropods' antioxidant mechanism to defend against these ROS attacks and their possible impact on their vector potentials or their ability to acquire and transmit pathogens. In addition, we describe the possible roles of ROS in chemical insecticide/acaricide activity and/or in the development of resistance. Overall, this underscores the importance of the antioxidant system as a potential target for the control of arthropod and arthropod-borne pathogens.

Keywords: ROS; acaricide; insecticide resistance; microbiome; mosquitoes; oxidative stress; ticks.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic diagram of the life cycle of the pathogen (A) after infection of the arthropod versus the arthropod-borne pathogen’s (B) life cycle and its interaction with ROS. Created with Biorender.com (accessed on 10 May 2022).
Figure 2
Figure 2
Schematic diagram on the activity of the phytochemicals and its possible mode of activity to cause mortality. Created with Biorender.com (accessed on 10 May 2022).

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