Apple polyphenols exhibits chondroprotective changes of synovium and prevents knee osteoarthritis

Area of Science:

• Biochemistry
• Pharmacology
• Biomedical Science

Background:

• Osteoarthritis (OA) is a degenerative joint disease characterized by inflammation and oxidative stress.
• Apple polyphenols (AP) possess known antioxidant and anti-inflammatory properties.
• Investigating natural compounds like AP for OA treatment is a significant area of research.

Purpose of the Study:

• To evaluate the therapeutic effects of apple polyphenols (AP) on the progression of osteoarthritis (OA).
• To determine if AP can mitigate inflammation and oxidative stress associated with OA.
• To explore the impact of AP on synovial cell function and OA severity.

Main Methods:

• Surgically induced OA model in rats treated with AP for 4 or 8 weeks.
• Assessment of inflammation and oxidative stress markers in synovial tissue.
• Measurement of tumor necrosis factor-alpha (TNF-α) and matrix metalloproteinase-13 (MMP-13) expression.
• In vitro studies using HIG-82 synoviocytes treated with AP or procyanidin B2 (PC).
• Evaluation of superoxide dismutase (SOD) activity in serum samples.

Main Results:

• AP treatment significantly suppressed synovial inflammation and oxidative stress in OA rats.
• OA severity scores, TNF-α, and MMP-13 expression were reduced by AP administration.
• AP enhanced cell proliferation and hyaluronan production in synoviocytes.
• Superoxide dismutase (SOD) activity was increased in the serum of AP-treated rats.

Conclusions:

• Apple polyphenols demonstrate potential as an effective treatment for osteoarthritis.
• AP's antioxidant and anti-inflammatory properties contribute to suppressing OA progression and improving synovial health.
• Long-term administration of AP may offer a beneficial therapeutic strategy for managing OA.