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Brain gene expression differences are associated with abnormal tail biting behavior in pigs.
MedLine Citation:
PMID:  23146156     Owner:  NLM     Status:  Publisher    
Knowledge about gene expression in animals involved in abnormal behaviours can contribute to understanding of the underlying biological mechanisms. The present study aimed to explore the motivational background to tail biting, an abnormal injurious behavior and severe welfare problem in pig production. Affymetrix microarrays were used to investigate gene expression differences in the hypothalamus and prefrontal cortex of pigs performing tail biting, pigs receiving bites to the tail and neutral pigs who were not involved in the behavior. In the hypothalamus, 32 transcripts were differentially expressed (P<0.05) when tail biters were compared with neutral pigs, 130 when comparing receiver pigs with neutrals, and two when tail biters were compared with receivers. In the prefrontal cortex, seven transcripts were differently expressed in tail biters compared to neutrals, seven in receivers vs. neutrals and none in the tail biters vs. receivers. In total 19 genes showed a different expression pattern in neutral pigs compared to both performers and receivers. This implies that the functions of these may provide knowledge about why the neutral pigs are not involved in tail biting behavior as performers or receivers. Among these 19 transcripts were genes associated with production traits in pigs (PDK4; Lan et al., 2009), sociality in humans and mice (GTF2I; Sakurai et al., 2011) and novelty seeking in humans (EGF; Keltikangas-Järvinen et al., 2006). These are in line with hypotheses linking tail biting with reduced back fat thickness (Breuer et al., 2005) and explorative behavior (EFSA, 2007).
Emma Brunberg; Per Jensen; Anders Isaksson; Linda J Keeling
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-12
Journal Detail:
Title:  Genes, brain, and behavior     Volume:  -     ISSN:  1601-183X     ISO Abbreviation:  Genes Brain Behav.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101129617     Medline TA:  Genes Brain Behav     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors. Genes, Brain and Behavior © 2012 Blackwell Publishing Ltd and International Behavioural and Neural Genetics Society.
Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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