Potassium ion channels as a molecular target to reduce virus infection and mortality of honey bee colonies

Virology Journal

Research

Christopher J. Fellows¹  Daniel R. Swale²  Troy D. Anderson³  Michael Simone-Finstrom⁴ 

[1] Department of Entomology, Louisiana State University AgCenter, 70803, Baton Rouge, LA, USA;Department of Entomology, Louisiana State University AgCenter, 70803, Baton Rouge, LA, USA;Department of Entomology and Nematology, Emerging Pathogens Institute, University of Florida, PO Box 100009, 2055 Mowry Road, 32610, Gainesville, FL, USA;Department of Entomology, University of Nebraska, 68583, Lincoln, NE, USA;USDA-ARS Honey Bee Breeding, Genetics, and Physiology Laboratory, 70820, Baton Rouge, LA, USA;

关键词: Kir;    Honey bee;    Reactive oxygen species;    IAPV;    Honey bee virus;    Antiviral immunity;   

DOI  :  10.1186/s12985-023-02104-0

 received in 2023-05-01, accepted in 2023-06-16,  发布年份 2023

来源: Springer

【 摘 要 】

Declines in managed honey bee populations are multifactorial but closely associated with reduced virus immunocompetence and thus, mechanisms to enhance immune function are likely to reduce viral infection rates and increase colony viability. However, gaps in knowledge regarding physiological mechanisms or ‘druggable’ target sites to enhance bee immunocompetence has prevented therapeutics development to reduce virus infection. Our data bridge this knowledge gap by identifying ATP-sensitive inward rectifier potassium (KATP) channels as a pharmacologically tractable target for reducing virus-mediated mortality and viral replication in bees, as well as increasing an aspect of colony-level immunity. Bees infected with Israeli acute paralysis virus and provided KATP channel activators had similar mortality rates as uninfected bees. Furthermore, we show that generation of reactive oxygen species (ROS) and regulation of ROS concentrations through pharmacological activation of KATP channels can stimulate antiviral responses, highlighting a functional framework for physiological regulation of the bee immune system. Next, we tested the influence of pharmacological activation of KATP channels on infection of 6 viruses at the colony level in the field. Data strongly support that KATP channels are a field-relevant target site as colonies treated with pinacidil, a KATP channel activator, had reduced titers of seven bee-relevant viruses by up to 75-fold and reduced them to levels comparable to non-inoculated colonies. Together, these data indicate a functional linkage between KATP channels, ROS, and antiviral defense mechanisms in bees and define a toxicologically relevant pathway that can be used for novel therapeutics development to enhance bee health and colony sustainability in the field.

【 授权许可】

CC BY   
© The Author(s) 2023

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