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The potential remedy of melatonin on osteoarthritis
Ko-Hsiu Lu1,2, Peace Wun-Ang Lu3, Eric Wun-Hao Lu4
1Department of Orthopedics, Chung Shan Medical University Hospital, Taichung, Taiwan.
Abstract:
Osteoarthritis (OA), the most common arthritis worldwide, is a degenerative joint disease characterized by progressive cartilage breakdown, subchondral remodeling, and synovial inflammation. Although conventional pharmaceutical therapies aimed to prevent further cartilage loss and joint dysfunction, there are no ideal strategies that target the pathogenesis of OA. Melatonin exhibits a variety of regulatory properties by binding to specific receptors and downstream molecules and exerts a myriad of receptor-independent actions via intracellular targets as a chondrocyte protector, an anti-inflammation modulator, and a free radical scavenger. Melatonin also modulates cartilage regeneration and degradation by directly/indirectly regulating the expression of main circadian clock genes, such as transcriptional activators [brain and muscle aryl hydrocarbon receptor nuclear translocator-like protein (Bmal) and circadian locomotor output cycles kaput (Clock)], transcriptional repressors [period circadian regulator (Per)1/2, cryptochrome (Cry)1/2, and Dec2], and nuclear hormone receptors [Rev-Erbs and retinoid acid-related orphan receptors (Rors)]. Owing to its effects on cartilage homeostasis, we propose a potential role for melatonin in the prevention and therapy of OA via the modulation of circadian clock genes, mitigation of chondrocyte apoptosis, anti-inflammatory activity, and scavenging of free radicals.
Insights
Melatonin may help prevent and treat osteoarthritis by protecting cartilage cells, reducing inflammation, and scavenging free radicals. It also influences the expression of key circadian clock genes involved in cartilage health.
Area of Science:
- Biochemistry
- Molecular Biology
- Rheumatology
Background:
- Osteoarthritis (OA) is a prevalent degenerative joint disease with no ideal treatments targeting its core pathology.
- Current therapies focus on symptom management and slowing progression, but not disease modification.
- Melatonin, a hormone with diverse biological functions, has shown potential in protecting joint tissues.
Purpose of the Study:
- To explore the potential role of melatonin in osteoarthritis prevention and therapy.
- To investigate melatonin's mechanisms of action, including its effects on chondrocytes and circadian clock genes.
Main Methods:
- Review of melatonin's known receptor-dependent and independent actions.
- Analysis of melatonin's influence on chondrocyte protection, inflammation, and free radical scavenging.
- Examination of melatonin's impact on the expression of key circadian clock genes (Bmal, Clock, Per1/2, Cry1/2, Dec2, Rev-Erb, Ror).
Main Results:
- Melatonin acts as a chondrocyte protector, anti-inflammatory agent, and free radical scavenger.
- Melatonin modulates cartilage homeostasis by regulating circadian clock gene expression.
- These actions suggest a multifaceted therapeutic potential for melatonin in OA.
Conclusions:
- Melatonin demonstrates significant potential for osteoarthritis prevention and treatment.
- Its therapeutic benefits are linked to chondroprotection, anti-inflammatory effects, free radical scavenging, and circadian clock gene modulation.
- Further research into melatonin's role in OA pathogenesis and therapy is warranted.
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