Age-dependent phenotypic characteristics of a triple transgenic mouse model of Alzheimer disease.
The triple-transgenic mouse line (3 x Tg-AD) harboring PS1M146V, APPSwe, and taup301L transgenes represents the only transgenic model for Alzheimer's disease (AD) to date capturing both beta-amyloid and tau neuropathology. The present study provides an extensive behavioral characterization of the 3 x Tg-AD mouse line, evaluating the emergence of noncognitive and cognitive AD-like symptoms at two ages corresponding to the early (6-7 months) and advanced (12-13 months) stages of AD-pathology. Enhanced responsiveness to aversive stimulation was detected in mutant mice at both ages: the 3 x Tg-AD genotype enhanced acoustic startle response and facilitated performance in the cued-version of the water maze. These noncognitive phenotypes were accompanied by hyperactivity and reduced locomotor habituation in the open field at the older age. Signs of cognitive aberrations were also detected at both ages, but they were limited to associative learning. The present study suggests that this popular transgenic mouse model of AD has clear phenotypes beyond the cognitive domain, and their potential relationship to the cognitive phenotypes should be further explored.
Pietropaolo
Susanna
S
Laboratory of Behavioral Neurobiology, Swiss Federal Institute of Technology Zurich, Schwerzenbach, Switzerland.
Feldon
Joram
J
Yee
Benjamin K
BK
D000161:Acoustic Stimulation / Q000379:methods; D000367:Age Factors; D000375:Aging; D000544:Alzheimer Disease / Q000235:genetics* / Q000473:pathology / Q000503:physiopathology*; D016564:Amyloid beta-Protein Precursor / Q000235:genetics; D000704:Analysis of Variance; D000818:Animals; D001362:Avoidance Learning / Q000502:physiology; D003214:Conditioning, Classical / Q000502:physiology; D004195:Disease Models, Animal; D006801:Humans; D018782:Maze Learning / Q000502:physiology; D051379:Mice; D008822:Mice, Transgenic; D009154:Mutation; D010641:Phenotype; D053764:Presenilin-1 / Q000235:genetics; D011597:Psychomotor Performance / Q000502:physiology; D011601:Psychophysics; D013216:Reflex, Startle / Q000235:genetics; D016875:tau Proteins / Q000235:genetics
D016564:Amyloid beta-Protein Precursor; D053764:Presenilin-1; D016875:tau Proteins