The Helico Maze Detects Early Impairment of Reference Memory at Three Months of Age in the 5XFAD Mouse Model of Alzheimer’s Disease - Archive ouverte HAL Access content directly
Journal Articles Journal of Alzheimer's Disease Year : 2022

The Helico Maze Detects Early Impairment of Reference Memory at Three Months of Age in the 5XFAD Mouse Model of Alzheimer’s Disease

Martine Migliorati
  • Function : Author
Christine Manrique
  • Function : Author
Melinda Rahrah
  • Function : Author
Guy Escoffier
  • Function : Author
Abdessadek El Ahmadi
  • Function : Author
Stéphane Girard
  • Function : Author
Santiago Rivera
  • Function : Author
Kévin Baranger
  • Function : Author
François Roman
  • Function : Author

Abstract

Background: The 5XFAD model of Alzheimer’s disease (AD) bearing five familial mutations of Alzheimer’s disease on human APP and PSEN1 transgenes shows deposits of amyloid-β peptide (Aβ) as early as 2 months, while deficits in long-term memory can be detected at 4 months using the highly sensitive olfactory-dependent tests that we previously reported. Objective: Given that detecting early dysfunctions in AD prior to overt pathology is of major interest in the field, we sought to detect memory deficits at earlier stages of the disease in 3-month-old male 5XFAD mice. Methods: To this end, we used the Helico Maze, a behavioral task that was recently developed and patented. This device allows deeper analysis of learning and subcategories of hippocampal-dependent long-term memory using olfactory cues. Results: Eight male 5XFAD and 6 male wild-type (WT: C57Bl6 background) mice of 3 months of age were tested in the Helico Maze. The results demonstrated, for the first time, a starting deficit of pure reference long-term memory. Interestingly, memory impairment was clearly correlated with Aβ deposits in the hippocampus. While we also found significant differences in astrogliosis between 5XFAD and WT mice, this was not correlated with memory abilities. Conclusion: Our results underline the efficiency of this new olfactory-dependent behavioral task, which is easy to use, with a small cohort of mice. Using the Helico Maze may open new avenues to validate the efficacy of treatments that target early events related to the amyloid-dependent pathway of the disease and AD progression.
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Dates and versions

hal-04235746 , version 1 (10-10-2023)

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Martine Migliorati, Christine Manrique, Melinda Rahrah, Guy Escoffier, Abdessadek El Ahmadi, et al.. The Helico Maze Detects Early Impairment of Reference Memory at Three Months of Age in the 5XFAD Mouse Model of Alzheimer’s Disease. Journal of Alzheimer's Disease, 2022, 90 (1), pp.251-262. ⟨10.3233/JAD-220281⟩. ⟨hal-04235746⟩
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