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Echinacoside Improves Memory Function and Bone Mineral Density in the Aged SAMP8 Mouse Model.

Rong Zhou1,2, Ge Tian1, Jing Yu3

  • 1Department of Geriatric Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.

Molecular Neurobiology
|November 19, 2025
PubMed
Summary

Echinacoside (ECH) shows promise in treating Alzheimer's disease (AD) and osteoporosis (OP) comorbidity. This study found ECH improved memory and reduced brain inflammation in a mouse model, with trends toward bone health benefits.

Keywords:
AgingAlzheimer’s diseaseEchinacosideOsteoporosisSenescence-accelerated mouse prone-8

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Area of Science:

  • Neuroscience
  • Gerontology
  • Pharmacology

Background:

  • Alzheimer's disease (AD) and osteoporosis (OP) are common age-related conditions that frequently coexist.
  • The senescence-accelerated mouse-prone 8 (SAMP8) model displays characteristics of both AD and OP, making it suitable for studying comorbidities.
  • Echinacoside (ECH) is a natural compound investigated for its potential therapeutic effects on neurodegenerative diseases and bone health.

Purpose of the Study:

  • To investigate the dual therapeutic efficacy of Echinacoside (ECH) in a mouse model exhibiting co-occurring Alzheimer's disease (AD) and osteoporosis (OP) features.
  • To evaluate the impact of ECH on cognitive function, brain pathology, and bone microstructure in the senescence-accelerated mouse-prone 8 (SAMP8) model.

Main Methods:

  • Six-month-old male SAMP8 mice were treated with ECH (100 mg/kg/day) or saline for 10 weeks.
  • Cognitive function was assessed using behavioral tests (open field, novel object recognition, Morris Water Maze).
  • Brain pathology (glial activation) was analyzed via Western blotting and immunofluorescence; bone microstructure was evaluated using micro-computed tomography (micro-CT).

Main Results:

  • SAMP8 mice exhibited impaired memory, increased locomotor activity issues, and significant glial activation compared to control SAMR1 mice.
  • ECH treatment notably improved memory function and reduced glial activation in SAMP8 mice.
  • While ECH showed a trend towards improving bone microstructure (trabecular bone number and separation), these changes did not reach statistical significance.

Conclusions:

  • The SAMP8 mouse model effectively recapitulates key aspects of Alzheimer's disease and osteoporosis comorbidity.
  • Echinacoside (ECH) demonstrates significant potential in ameliorating cognitive deficits and neuroinflammation associated with AD-OP comorbidity.
  • ECH warrants further investigation as a therapeutic agent for managing coexisting neurodegenerative and bone degenerative diseases.