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dc.contributor.authorChristen, V
dc.contributor.authorBachofer, S
dc.contributor.authorFent, K
dc.date.accessioned2017-01-23T05:41:45Z
dc.date.available2017-01-23T05:41:45Z
dc.date.issued2016-11-11
dc.identifier.doi10.1016/j.envpol.2016.10.105
dc.identifier.urihttp://hdl.handle.net/11654/24029
dc.description.abstractAmong the many factors responsible for the decline of bee populations are plant protection products such as neonicotinoids. In general, bees are exposed to not only one but mixtures of such chemicals. At environmental realistic concentrations neonicotinoids may display negative effects on the immune system, foraging activity, learning and memory formation of bees. Neonicotinoids induce alterations of gene transcripts such as nicotinic acetylcholine receptor (nAChR) subunits, vitellogenin, genes of the immune system and genes linked to memory formation. While previous studies focused on individual compounds, the effect of neonicotinoid mixtures in bees is poorly known. Here we investigated the effects of neonicotinoids acetamiprid, clothianidin, imidacloprid and thiamethoxam as single compounds, and binary mixtures thereof in honeybees. We determined transcriptional changes of nAChR subunits and vitellogenin in the brain of experimentally exposed honeybees after exposure up to 72 h. Exposure concentrations were selected on the basis of lowest effect concentrations of the single compounds. Transcriptional induction of nAChRs and vitellogenin was strongest for thiamethoxam, and weakest for acetamiprid. To a large extent, binary mixtures did not show additive transcriptional inductions but they were less than additive. Our data suggest that the joint transcriptional activity of neonicotinoids cannot be explained by concentration addition. The in vivo effects are not only governed by agonistic interaction with nAChRs alone, but are more complex as a result of interactions with other pathways as well. Further studies are needed to investigate the physiological joint effects of mixtures of neonicotinoids and other plant protection products on bees to better understand their joint effects.
dc.language.isoen
dc.relation.ispartofEnvironmental Pollution
dc.accessRightsAnonymous
dc.subjectVitellogenin
dc.subjectTranscription analysis
dc.subjectNicotinic acetylcholine receptors
dc.subjectNeonicotinoids
dc.subjectMixture activity
dc.subjectHoneybees
dc.titleBinary mixtures of neonicotinoids show different transcriptional changes than single neonicotinoids in honeybees (Apis mellifera).
dc.type01 - Zeitschriftenartikel, Journalartikel oder Magazin
dc.volume220
dc.issuePart B
dc.audienceScience
fhnw.publicationStatePublished
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.InventedHereYes
fhnw.PublishedSwitzerlandNo
fhnw.pagination1264-1270
fhnw.IsStudentsWorkno
fhnw.publicationOnlineJa


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