Abstract
The membrane-associated mucin (MAM) domain containing glycosylphosphatidylinositol anchor 2 protein single knock-out mice (MDGA2+/- ) are models of ASD. We examined the behavioral phenotypes of male and female MDGA2+/- and wildtype mice on C57BL6/NJ and C57BL6/N backgrounds at 2 months of age and measured MDGA2, neuroligin 1 and neuroligin 2 levels at 7 months. Mice on the C57BL6/NJ background performed better than those on the C57BL6/N background in visual ability and in learning and memory performance in the Morris water maze and differed in measures of motor behavior and anxiety. Mice with the MDGA2+/- genotype differed from WT mice in motor, social and repetitive behavior and anxiety, but most of these effects involved interactions between MDGA2+/- genotype and background strain. The background strain also influenced MDGA2 levels and NLGN2 association in MDGA2+/- mice. Our findings emphasize the importance of the background strain used in studies of genetically modified mice.
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