RGD Reference Report - Genetic evidence for chromosome 4 loci influencing learning and memory. - Rat Genome Database

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Genetic evidence for chromosome 4 loci influencing learning and memory.

Authors: Anselmi, M  Correa, FJ  Santos, JR  Silva, AF  Cunha, JA  Leao, AH  Campelo, CL  Ribeiro, AM  Silva, RH  Izidio, GS 
Citation: Anselmi M, etal., Neurobiol Learn Mem. 2016 May;131:182-91. doi: 10.1016/j.nlm.2016.03.024. Epub 2016 Apr 1.
RGD ID: 11566049
Pubmed: (View Article at PubMed) PMID:27044679
DOI: Full-text: DOI:10.1016/j.nlm.2016.03.024

The Lewis (LEW) and SHR (Spontaneously Hypertensive Rats) inbred rat strains differ in several anxiety/emotionality and learning/memory-related behaviors. We aimed to search quantitative trait locus (QTL) that influence these behaviors and confirm their effects in a congenic rat strain SLA16 (SHR.LEW.Anxrr16). LEW females and SHR males were intercrossed to produce F2 rats (96/sex), which were all tested in the plus-maze discriminative avoidance task (PMDAT), open-field (OF), object recognition (OR), spontaneous alternation (SA) and fear conditioning (FC). All animals were genotyped for microsatellite markers located on chromosome (Chr) 4. Behavioral and genotypic data were used to perform factor and QTL analyses. Also, to confirm the QTL effects, we tested male and female SLA16 rats and their isogenic control SHR in the same behavioral tests. A factor analysis of the F2 population revealed a correlation between anxiety/emotionality related behaviors and learning/memory in both sexes. QTL analysis revealed two significant QTL in males and three in females, on behavioral parameters in the PMDAT, OF and FC. Four QTL found herein were confirmed in SLA16 rats. The SLA16 strain displayed lower levels of anxiety/emotionality, higher locomotor activity and deficits in learning/memory in comparison with SHR strain. The Chr 4 contains genes influencing anxiety/emotionality and learning/memory behaviors and the SLA16 strain represents a valuable tool in the search for them. The use of the SLA16 strain as a genetic model for studying behavioral phenomena and their implications for psychiatric disorders are discussed.

Annotation

Objects Annotated

QTLs
Anxrr54  (Anxiety related response QTL 54)
Anxrr55  (Anxiety related response QTL 55)
Anxrr56  (Anxiety related response QTL 56)
Anxrr57  (Anxiety related response QTL 57)
Anxrr58  (Anxiety related response QTL 58)


Additional Information