title: High-throughput phenotyping of avoidance learning in mice discriminates different genotypes and identifies a novel gene.
abstract: Recognizing and avoiding aversive situations are central aspects of mammalian cognition. These abilities are essential for health and survival and are expected to have a prominent genetic basis. We modeled these abilities in eight common mouse inbred strains covering ∼75% of the species' natural variation and in gene-trap mice (>2000 mice), using an unsupervised, automated assay with an instrumented home cage (PhenoTyper) containing a shelter with two entrances. Mice visited this shelter for 20-1200 times/24 h and 71% of all mice developed a significant and often strong preference for one entrance. Subsequently, a mild aversive stimulus (shelter illumination) was automatically delivered when mice used their preferred entrance. Different genotypes developed different coping strategies. Firstly, the number of entries via the preferred entrance decreased in DBA/2J, C57BL/6J and 129S1/SvImJ, indicating that these genotypes associated one specific entrance with the aversive stimulus. Secondly, mice started sleeping outside (C57BL/6J, DBA/2J), indicating they associated the shelter, in general, with the aversive stimulus. Some mice showed no evidence for an association between the entrance and the aversive light, but did show markedly shorter shelter residence times in response to illumination, indicating they did perceive illumination as aversive. Finally, using this assay, we screened 43 different mutants, which yielded a novel gene, specc1/cytospinB. This mutant showed profound and specific delay in avoidance learning. Together, these data suggest that different genotypes express distinct learning and/or memory of associations between shelter entrance and aversive stimuli, and that specc1/cytospinB is involved in this aspect of cognition.
authors: Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University Amsterdam and VU Medical Center, Amsterdam, The Netherlands.
authors: G
authors: G
authors: Maroteaux
authors: M
authors: M
authors: Loos
authors: S
authors: S
authors: van der Sluis
authors: B
authors: B
authors: Koopmans
authors: E
authors: E
authors: Aarts
authors: K
authors: K
authors: van Gassen
authors: A
authors: A
authors: Geurts
authors: D A
authors: DA
authors: Largaespada
authors: B M
authors: BM
authors: Spruijt
authors: O
authors: O
authors: Stiedl
authors: A B
authors: AB
authors: Smit
authors: M
authors: M
authors: Verhage
mesh_terms: D000818:Animals; D001362:Avoidance Learning; D018797:Cell Cycle Proteins; D003598:Cytoskeletal Proteins; D005838:Genotype; D057166:High-Throughput Screening Assays / Q000379:methods; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008817:Mice, Mutant Strains; D009687:Nuclear Proteins / Q000235:genetics*; D010641:Phenotype; D010750:Phosphoproteins / Q000235:genetics* / Q000378:metabolism
chemical_list: D018797:Cell Cycle Proteins; D003598:Cytoskeletal Proteins; D009687:Nuclear Proteins; D010750:Phosphoproteins; C578713:Specc1 protein, mouse