Knee osteoarthritis accelerates amyloid beta deposition and neurodegeneration in a mouse model of Alzheimer's disease.
Deepak Prasad GuptaYoung-Sun LeeYoungshik ChoeKun-Tae KimGyun Jee SongSun-Chul HwangPublished in: Molecular brain (2023)
Knee osteoarthritis (OA) is characterized by knee cartilage degeneration and secondary bone hyperplasia, resulting in pain, stiffness, and gait disturbance. The relationship between knee OA and neurodegenerative diseases is still unclear. This study used an Alzheimer's disease (AD) mouse model to observe whether osteoarthritis accelerates dementia progression by analyzing brain histology and neuroinflammation. Knee OA was induced by destabilizing the medial meniscus (DMM) in control (WT) and AD (5xFAD) mice before pathological symptoms. Mouse knee joints were scanned with a micro-CT scanner. A sham operation was used as control. Motor and cognitive abilities were tested after OA induction. Neurodegeneration, β-amyloid plaque formation, and neuroinflammation were analyzed by immunostaining, Western blotting, and RT-PCR in brain tissues. Compared with sham controls, OA in AD mice increased inflammatory cytokine levels in brain tissues. Furthermore, OA significantly increased β-amyloid deposition and neuronal loss in AD mice compared to sham controls. In conclusion, knee OA accelerated amyloid plaque deposition and neurodegeneration in AD-OA mice, suggesting that OA is a risk factor for AD.
Keyphrases
- knee osteoarthritis
- mouse model
- high fat diet induced
- cerebral ischemia
- resting state
- traumatic brain injury
- cognitive impairment
- white matter
- coronary artery disease
- multiple sclerosis
- cognitive decline
- metabolic syndrome
- functional connectivity
- computed tomography
- pain management
- south africa
- lipopolysaccharide induced
- body composition
- brain injury
- insulin resistance
- blood brain barrier
- wild type
- adipose tissue
- spinal cord
- inflammatory response
- depressive symptoms
- positron emission tomography
- bone regeneration