Related Experiment Video
Updated: Jun 7, 2025
Intracerebroventricular Injection of Amyloid-β Peptides in Normal Mice to Acutely Induce Alzheimer-like Cognitive Deficits
Published on: March 16, 2016
A comparison of cognitive decline in aged mice and mice treated with aftin-4
Neža Žnidaršič1, Neža Grgurevič1, Alenka Nemec Svete2
1Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, 1000, Slovenia.
Abstract:
Dementia, especially Alzheimer's disease, presents a major clinical challenge, and researchers are still searching for an optimal animal model. To address this gap, we compared male and ovariectomized female C57BL/6 mice treated with 30 mg/kg aftin-4, which induces neurodegeneration, with naturally aged (15-16 months old) mice not treated with aftin-4. We performed a series of behavioral tests; measured postmortem plasma β-amyloid levels (Aβ1-40 and Aβ1-42) and the levels of the oxidative stress indicators glutathione peroxidase (GPx), superoxide dismutase (SOD) and malondialdehyde (MDA); and evaluated astrocytic reactivity in the brain using glial fibrillary acid protein (GFAP) levels. Our results revealed no behavioral changes in the aged or aftin-4-treated mice compared with the control mice. Aftin-4 mice presented lower brain MDA levels and no detectable changes in plasma Aβ levels. In general, female mice had higher GPx and SOD levels and lower Aβ1-42 levels than male mice did. In contrast, aged and aftin-4-treated male mice presented elevated levels of GFAP, indicating astrocyte damage. Our results could not confirm that either aftin-4-treated or aged mice are reliable models for dementia. However, the observed molecular changes suggest that male animals may be more susceptible to oxidative stress and brain damage than females are. This study demonstrates the complexity of modeling dementia in animals and the importance of future studies in this area.
Insights
This study found that neither aftin-4 treated nor aged mice are reliable dementia models. However, male mice showed more susceptibility to oxidative stress and brain damage than females.
Area of Science:
- Neuroscience
- Animal Models
- Gerontology
Background:
- Dementia, particularly Alzheimer's disease, poses a significant clinical challenge.
- Developing optimal animal models for dementia research remains an ongoing pursuit.
- Existing models may not fully recapitulate the complexities of human dementia.
Purpose of the Study:
- To evaluate the suitability of aftin-4 treated and aged C57BL/6 mice as models for dementia.
- To compare molecular and cellular changes in male and ovariectomized female mice under different conditions.
- To investigate potential sex differences in response to neurodegeneration induction and aging.
Main Methods:
- Comparison of male and ovariectomized female C57BL/6 mice treated with aftin-4 versus naturally aged mice.
- Behavioral testing, measurement of plasma beta-amyloid (Aβ1-40, Aβ1-42), and oxidative stress markers (GPx, SOD, MDA).
- Assessment of astrocytic reactivity via glial fibrillary acid protein (GFAP) levels in brain tissue.
Main Results:
- No significant behavioral changes were observed in aged or aftin-4 treated mice compared to controls.
- Aftin-4 treated mice showed reduced brain malondialdehyde (MDA) levels and unchanged plasma Aβ levels.
- Male mice, particularly aged and aftin-4 treated, exhibited elevated GFAP levels, indicating astrocyte damage, while females generally showed higher antioxidant enzyme activity.
Conclusions:
- Neither aftin-4 treated nor aged mice reliably model dementia based on the parameters studied.
- Male mice appear more vulnerable to oxidative stress and neuroinflammation than female mice.
- The study highlights the challenges in creating accurate animal models for dementia and suggests further investigation into sex-specific responses.
More Related Videos
14:57Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
10:02Assessment of Spontaneous Alternation, Novel Object Recognition and Limb Clasping in Transgenic Mouse Models of Amyloid-β and Tau Neuropathology
Published on: May 28, 2017