
Impaired thermoregulation and beneficial effects of thermoneutrality in the 3×Tg-AD model of Alzheimer's disease.
The sharp rise in the incidence of Alzheimer's disease (AD) at an old age coincides with a reduction in energy metabolism and core body temperature. We found that the triple-transgenic mouse model of AD (3×Tg-AD) spontaneously develops a lower basal body temperature and is more vulnerable to a cold environment compared with age-matched controls. This was despite higher nonshivering thermogenic activity, as evidenced by brown adipose tissue norepinephrine content and uncoupling protein 1 expression. A 24-hour exposure to cold (4 °C) aggravated key neuropathologic markers of AD such as: tau phosphorylation, soluble amyloid beta concentrations, and synaptic protein loss in the cortex of 3×Tg-AD mice. Strikingly, raising the body temperature of aged 3×Tg-AD mice via exposure to a thermoneutral environment improved memory function and reduced amyloid and synaptic pathologies within a week. Our results suggest the presence of a vicious cycle between impaired thermoregulation and AD-like neuropathology, and it is proposed that correcting thermoregulatory deficits might be therapeutic in AD.
Duke Scholars
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Related Subject Headings
- tau Proteins
- Uncoupling Protein 1
- Thermogenesis
- Temperature
- Synapses
- Phosphorylation
- Norepinephrine
- Neurology & Neurosurgery
- Mice, Transgenic
- Energy Metabolism
Citation

Published In
DOI
EISSN
Publication Date
Volume
Start / End Page
Location
Related Subject Headings
- tau Proteins
- Uncoupling Protein 1
- Thermogenesis
- Temperature
- Synapses
- Phosphorylation
- Norepinephrine
- Neurology & Neurosurgery
- Mice, Transgenic
- Energy Metabolism