cardiovascular system
• reduced systolic blood pressure in both male and female mice at 6 months of age relative to age- and sex-matched wild-type controls
• however, heart rate is normal
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behavior/neurological
N |
• both male and female mice show normal cued task and acquisition performance, as determined by the mean distance traveled on a visible version and on the hidden version of the Morris water maze test
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• at 4 months of age, male mice fail to recognize a trained odor at 72 h retention time in the social transmission of food preference (STFP) test, unlike wild-type males which recognize the trained odor at 24 h and 72 h
• in contrast, female mice recognize the trained odor at 24 h retention time, unlike wild-type females which fail to distinguish trained from non-trained odors
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• at 3 months of age, female mice perform better than wild-type females by showing target selectivity and decreased latency to target counter in the Morris water maze test
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• at 3 months of age, male mice fail to exhibit enhanced preference for the target quadrant and show increased latency to target counter in the Morris water maze test relative to wild-type males
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• at 3 months of age, female mice show a significantly higher % of entries on open arms than wild-type females in the elevated plus maze test
• in contrast, male mice show a normal % of entries on open arms relative to wild-type males
• both sexes show a similar number of entries in closed arms relative to wild-type controls, suggesting normal overall locomotor activity
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renal/urinary system
• significant decrease in maximal urinary osmolality in male (but not female) mice after a 24 h water restriction relative to wild-type controls
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• significant increase in mean urine volume in male mice under basal conditions with free access to drinking water relative to wild-type males
• impaired ability to decrease urine flow in male (but not female) mice after a 24 h water restriction
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homeostasis/metabolism
• significant decrease in maximal urinary osmolality in male (but not female) mice after a 24 h water restriction relative to wild-type controls
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