Journal
BIOLOGICAL TRACE ELEMENT RESEARCH
Volume 150, Issue 1-3, Pages 221-228Publisher
HUMANA PRESS INC
DOI: 10.1007/s12011-012-9507-5
Keywords
Bombyx mori nucleopolyhedrovirus; Silkworm; Mortality; Resistance-related genes; Titanium dioxide nanoparticles
Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- National Natural Science Foundation of China [31072086]
- China Agriculture Research System [CARS-22-ZJ0305]
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Bombyx mori nucleopolyhedrovirus (BmNPV) causes infection in the silkworm that is often lethal. The infection is hard to prevent, partly because of the nature of the virus particles and partly because of the different strains of B. mori. Titanium dioxide nanoparticles (TiO2 NPs) have been demonstrated to have antimicrobial properties. The present study investigated whether TiO2 NPs added to an artificial diet can increase the resistance of B. mori larvae to BmNPV and examined the molecular mechanism behind any resistance shown. The results indicated that ingested TiO2 NPs decreased reactive oxygen species and NO accumulation in B. mori larvae under BmNPV infection, which in turn led to a decrease in their growth inhibition and mortality. In addition, the TiO2 NPs significantly promoted the expression of resistance-related genes, including those encoding superoxide dismutase, catalase, glutathione peroxidase, acetylcholine esterase, carboxylesterase, heat shock protein 21, glutathione S transferase o1, P53, and transferring and of genes encoding cytochrome p302 and nitric oxide synthase. These findings are a useful addition to the understanding of the mechanism of BmNPV resistance of B. mori larvae in response to TiO2 NPs addition. Such information also provides a theoretical basis for the use of TiO2 NPs in sericulture.
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