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Thy1-hAPP(Lond/Swe+) mouse model of Alzheimer's disease displays broad behavioral deficits in sensorimotor, cognitive and social function.

Faizi M, Bader PL, Saw N, Nguyen TV, Beraki S, Wyss-Coray T, Longo FM, Shamloo M - Brain Behav (2012)

Bottom Line: We found hyperactivity in a novel environment as well as significant deficits in spontaneous alternation behavior.This could possibly be explained by decreased social memory or discrimination and may parallel disturbances in social functioning in human AD patients.In conclusion, the Thy1-hAPP(Lond/Swe+) mouse model of AD displayed a behavioral phenotype that resembles, in part, the cognitive and psychiatric symptoms experienced in AD patients.

View Article: PubMed Central - PubMed

ABSTRACT
Alzheimer's disease (AD), the most common form of dementia, is an age-dependent progressive neurodegenerative disorder. β-amyloid, a metabolic product of the amyloid precursor protein (APP), plays an important role in the pathogenesis of AD. The Thy1-hAPP(Lond/Swe+) (line 41) transgenic mouse overexpresses human APP751 and contains the London (V717I) and Swedish (K670M/N671L) mutations. Here, we used a battery of behavioral tests to evaluate general activity, cognition, and social behavior in six-month-old male Thy1-hAPP(Lond/Swe+) mice. We found hyperactivity in a novel environment as well as significant deficits in spontaneous alternation behavior. In fear conditioning (FC), Thy1-hAPP(Lond/Swe+) mice did not display deficits in acquisition or in memory retrieval in novel context of tone-cued FC, but they showed significant memory retrieval impairment during contextual testing in an identical environment. Surprisingly, in a standard hidden platform water maze, no significant deficit was detected in mutant mice. However, a delayed-matching-to-place paradigm revealed a significant deficit in Thy1-hAPP(Lond/Swe+) mice. Lastly, in the social novelty session of a three-chamber test, Thy1-hAPP(Lond/Swe+) mice exhibited a significantly decreased interest in a novel versus a familiar stranger compared to control mice. This could possibly be explained by decreased social memory or discrimination and may parallel disturbances in social functioning in human AD patients. In conclusion, the Thy1-hAPP(Lond/Swe+) mouse model of AD displayed a behavioral phenotype that resembles, in part, the cognitive and psychiatric symptoms experienced in AD patients.

No MeSH data available.


Related in: MedlinePlus

T-maze and Y-maze. (a) T-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (b) Y-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (c) The number of total entries in the arms of the Y-maze was not significantly different. n(each genotype) = 12.
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fig04: T-maze and Y-maze. (a) T-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (b) Y-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (c) The number of total entries in the arms of the Y-maze was not significantly different. n(each genotype) = 12.

Mentions: The T-maze and Y-maze were used to assess spontaneous alternation and spatial working memory. Thy1-hAPPLond/Swe+ mice showed a deficit in spontaneous alternation both in the T-maze (Fig. 4a; P = 0.026) and the Y-maze (Fig. 4b; P = 0.04). However, no difference was revealed between genotypes in the number of entries made in the Y-maze (Fig. 4c; P = 0.95).


Thy1-hAPP(Lond/Swe+) mouse model of Alzheimer's disease displays broad behavioral deficits in sensorimotor, cognitive and social function.

Faizi M, Bader PL, Saw N, Nguyen TV, Beraki S, Wyss-Coray T, Longo FM, Shamloo M - Brain Behav (2012)

T-maze and Y-maze. (a) T-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (b) Y-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (c) The number of total entries in the arms of the Y-maze was not significantly different. n(each genotype) = 12.
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Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3345358&req=5

fig04: T-maze and Y-maze. (a) T-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (b) Y-maze: Thy1-hAPPLond/Swe+ showed significantly (P < 0.05, t-test) less spontaneous alterations than control mice. n(each genotype) = 12. (c) The number of total entries in the arms of the Y-maze was not significantly different. n(each genotype) = 12.
Mentions: The T-maze and Y-maze were used to assess spontaneous alternation and spatial working memory. Thy1-hAPPLond/Swe+ mice showed a deficit in spontaneous alternation both in the T-maze (Fig. 4a; P = 0.026) and the Y-maze (Fig. 4b; P = 0.04). However, no difference was revealed between genotypes in the number of entries made in the Y-maze (Fig. 4c; P = 0.95).

Bottom Line: We found hyperactivity in a novel environment as well as significant deficits in spontaneous alternation behavior.This could possibly be explained by decreased social memory or discrimination and may parallel disturbances in social functioning in human AD patients.In conclusion, the Thy1-hAPP(Lond/Swe+) mouse model of AD displayed a behavioral phenotype that resembles, in part, the cognitive and psychiatric symptoms experienced in AD patients.

View Article: PubMed Central - PubMed

ABSTRACT
Alzheimer's disease (AD), the most common form of dementia, is an age-dependent progressive neurodegenerative disorder. β-amyloid, a metabolic product of the amyloid precursor protein (APP), plays an important role in the pathogenesis of AD. The Thy1-hAPP(Lond/Swe+) (line 41) transgenic mouse overexpresses human APP751 and contains the London (V717I) and Swedish (K670M/N671L) mutations. Here, we used a battery of behavioral tests to evaluate general activity, cognition, and social behavior in six-month-old male Thy1-hAPP(Lond/Swe+) mice. We found hyperactivity in a novel environment as well as significant deficits in spontaneous alternation behavior. In fear conditioning (FC), Thy1-hAPP(Lond/Swe+) mice did not display deficits in acquisition or in memory retrieval in novel context of tone-cued FC, but they showed significant memory retrieval impairment during contextual testing in an identical environment. Surprisingly, in a standard hidden platform water maze, no significant deficit was detected in mutant mice. However, a delayed-matching-to-place paradigm revealed a significant deficit in Thy1-hAPP(Lond/Swe+) mice. Lastly, in the social novelty session of a three-chamber test, Thy1-hAPP(Lond/Swe+) mice exhibited a significantly decreased interest in a novel versus a familiar stranger compared to control mice. This could possibly be explained by decreased social memory or discrimination and may parallel disturbances in social functioning in human AD patients. In conclusion, the Thy1-hAPP(Lond/Swe+) mouse model of AD displayed a behavioral phenotype that resembles, in part, the cognitive and psychiatric symptoms experienced in AD patients.

No MeSH data available.


Related in: MedlinePlus