Article (Scientific journals)
A field realistic model to assess the effects of pesticides residues and adulterants on honey bee gene expression.
El Agrebi, Noëmie; De Smet, Lina; Douny, Caroline et al.
2024In PLoS ONE, 19 (6), p. 0302183
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Keywords :
Waxes; beeswax; Pesticide Residues; Insect Proteins; Animals; Bees/genetics; Bees/drug effects; Pupa/drug effects; Pupa/genetics; Larva/drug effects; Larva/genetics; Insect Proteins/genetics; Insect Proteins/metabolism; Gene Expression Regulation/drug effects; Pesticide Residues/toxicity; Pesticide Residues/analysis; Bees; Gene Expression Regulation; Larva; Pupa; Multidisciplinary
Abstract :
[en] While studies on the sublethal effects of chemical residues in beeswax on adult honey bees are increasing, the study protocols assessing the impacts on honey bee brood in realistic conditions still need to be investigated. Moreover, little is known about the residue's effect on gene expression in honey bee brood. This study reports the effects of chlorpyriphos-ethyl, acrinathrin and stearin worker pupae exposure through contaminated or adulterated beeswax on the gene expression of some key health indicators, using a novel in vivo realistic model. Larvae were reared in acrinathrin (12.5, 25, 10 and 100 ppb) and chlorpyriphos-ethyl (5, 10, 500 and 5000 ppb) contaminated or stearin adulterated beeswax (3, 4, 5, 6 and 9%) in newly formed colonies to reduce the influence of external factors. On day 11, mortality rates were assessed. Honey bee pupae were extracted from the comb after 19 days of rearing and were analysed for the gene expression profile of four genes involved in the immune response to pathogens and environmental stress factors (Imd, dorsal, domeless and defensin), and two genes involved in detoxifications mechanisms (CYP6AS14 and CYP9Q3). We found no linear relation between the increase in the pesticide concentrations and the brood mortality rates, unlike stearin where an increase in stearin percentage led to an exponential increase in brood mortality. The immune system of pupae raised in acrinathrin contaminated wax was triggered and the expression of CYP6AS14 was significantly upregulated (exposure to 12.5 and 25 ppb). Almost all expression levels of the tested immune and detoxification genes were down-regulated when pupae were exposed to chlorpyrifos-contaminated wax. The exposure to stearin triggered the immune system and detoxification system of the pupae. The identification of substance-specific response factors might ultimately serve to identify molecules that are safer for bees and the ecosystem's health.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
El Agrebi, Noëmie ;  Research Unit of Epidemiology and Risk analysis applied to Veterinary sciences (UREAR-ULiège), Fundamental and Applied Research for Animal and Health (FARAH) Center, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
De Smet, Lina;  Faculty of Sciences, Laboratory of Molecular Entomology and Bee Pathology, Ghent University (UGent), Ghent, Belgium ; Faculty of Sciences, Honeybee Valley, Ghent University (UGent), Ghent, Belgium
Douny, Caroline  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Scippo, Marie-Louise  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Svečnjak, Lidija;  University of Zagreb, Faculty of Agriculture, Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, Zagreb, Croatia
de Graaf, Dirk C;  Faculty of Sciences, Laboratory of Molecular Entomology and Bee Pathology, Ghent University (UGent), Ghent, Belgium ; Faculty of Sciences, Honeybee Valley, Ghent University (UGent), Ghent, Belgium
Saegerman, Claude  ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Epidémiologie et analyse des risques appliqués aux sciences vétérinaires
Language :
English
Title :
A field realistic model to assess the effects of pesticides residues and adulterants on honey bee gene expression.
Publication date :
2024
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science, United States
Volume :
19
Issue :
6
Pages :
e0302183
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Operational General Direction in Agriculture, Natural Resources and Environment
University of Liège
Funding text :
Operational General Direction in Agriculture, Natural Resources and Environment (DGARNE) (Grant Quali Wax D32-0443) and the University of Li\u00E8ge (cr\u00E9dit facultaire). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. We thank Oleon NV for providing us with stearin. This work would not have been accomplished without the help of Benoit Dupret, the beekeeper that helped supervise the experimental apiary.
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since 02 December 2024

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