Related Experiment Videos
The cause-effect relationship between bone loss and Alzheimer's disease using statistical modeling.
Natalia Loskutova1, Amber S Watts2, Jeffrey M Burns3
1American Academy of Family Physicians National Research Network, USA.
Medical Hypotheses
|December 30, 2018
Summary
Alzheimer's disease (AD) is linked to bone loss, potentially due to hypothalamic atrophy. However, leptin and IGF-1 do not appear to mediate this relationship, suggesting other mechanisms may be involved in AD bone loss.
Area of Science:
- Neuroscience
- Bone Biology
- Gerontology
Background:
- The central nervous system (CNS) regulates bone remodeling via hypothalamic pathways.
- The impact of Alzheimer's disease (AD) on these central bone regulation mechanisms is unknown.
Purpose of the Study:
- To investigate the relationship between hypothalamic atrophy and bone loss in AD.
- To assess potential mediation by neural (leptin) and neurohumoral (IGF-1) pathways.
Main Methods:
- Secondary analysis of a two-year longitudinal study using path analysis.
- Included 71 early-stage AD patients and 69 controls, measuring bone density, body composition, hypothalamic volume, and serum biomarkers.
- Longitudinal mediation modeling was employed.
Main Results:
- Hypothalamic atrophy and bone loss were observed and associated in the AD group.
- Bone loss may precede detectable brain changes.
- Leptin increased in AD patients and correlated with hypothalamic atrophy, but did not mediate the atrophy-bone loss link.
Conclusions:
- Bone loss in AD may be associated with neurodegenerative hypothalamic changes.
- Further research is needed to elucidate mediating mechanisms and the temporal relationship between bone loss and AD.
- Understanding this relationship could have diagnostic implications.