By Marc Dellière, Medical Consultant & Trainer – Specialist in Stress, Prevention & Integrative Health
It is not simply mechanical wear and tear.
It is a silent inflammation, a low-grade fire that disrupts the entire joint ecosystem: cartilage, bone, synovium, ligaments.
Science teaches us how to slow down this flame:
- by modulating cytokines, the chemical messengers of inflammation;
- by slowing down cellular senescence (Cx43);
- by restoring joint mechanics;
- by rebalancing the metabolic terrain.
Losing 1 kg means 4 kg less load on the knee with each step (Messier et al., 2005).
Moving, breathing, lightening your load: these are all ways to calm the inner flame.
How does osteoarthritis develop and what mechanisms can be counteracted?
Long considered to be simply age-related mechanical wear and tear, osteoarthritis is now recognized as a systemic joint disease involving cartilage, subchondral bone, synovium, and pain nerve networks. It is a disease of cellular communication, in which mechanical stress and low-grade chronic inflammation feed off each other.
The starting point: mechanical and cellular stress
It all starts with chronic mechanical overload: excess weight, microtrauma, joint misalignment, or tissue aging. Chondrocytes, the cells that make up cartilage, respond by producing degradative enzymes—metalloproteinases (MMP-13) and aggrecanases (ADAMTS-5)—which destroy collagen and proteoglycans.
Result: the cartilage matrix degrades faster than it can rebuild itself. The cartilage loses its elasticity, cracks, and then exposes the underlying bone.
“The pathogenesis of osteoarthritis involves low-grade chronic inflammation, metabolic dysregulation, and mechanical stress.”
Low-grade inflammation fuels destruction.
Cartilage debris activates the synovial membrane, which releases pro-inflammatory cytokines (IL-1β, TNF-α, IL-6). These signals stimulate the chondrocytes again and fuel a vicious cycle: inflammation → degradation → inflammation.
The NF-κB and MAPK signaling pathways, which are highly active in osteoarthritic cartilage, amplify the inflammatory response and oxidative stress.
“Synovial inflammation, through activation of NF-κB and MAPK, plays a key role in the progression of the disease.”
Bone and synovium participate in the cascade
Under the cartilage, the subchondral bone becomes denser (sclerosis), microfractures, and changes the distribution of stress. The synovium thickens, becomes infiltrated with macrophages, and releases new cytokines. Ligaments and tendons adapt poorly to this silent inflammation, aggravating stiffness and pain.
Osteoarthritis is therefore an overall imbalance, where structure, inflammation, and mechanics are intertwined.
New approaches to “slow down” the process — and counter inflammation
Recent research is focusing on three major targets: modulating cytokines and oxidative stress, reducing cellular senescence, and restoring joint mechanics.
a) Calming synovial micro-inflammation
Objective: to reduce the release of cytokines (IL-1β, TNF-α, IL-6) and block the NF-κB cascade without slowing down repair.
Promising avenues:
Bioactive milk peptides capable of reducing joint cytokine production and oxidative stress: Xelflex®
Natural NF-κB modulators: polyphenols (curcumin, resveratrol), omega-3, vitamin D
Selective IL-1β inhibitors (anakinra, canakinumab, under clinical evaluation)
“Milk peptides can modulate joint cytokine production and NF-κB signaling, paving the way for nutritional regulation of inflammation.”
b) Reducing cellular senescence and oxidative stress
Aging chondrocytes secrete a pro-inflammatory SASP (Senescence-Associated Secretory Phenotype). This is a self-perpetuating inflammation associated with aging.
Areas of research:
Connexin 43 (Cx43): inhibiting this cell junction protein reduces senescence and restores a regenerative profile in chondrocytes.
Targeted mitochondrial antioxidants (CoQ10, NAC): slow down cytokine release and cell apoptosis.
Regular exercise: stimulates anti-inflammatory pathways (IL-10) and protective autophagy.
c) Lubricate to soothe
Mechanical shearing mechanically activates pro-inflammatory genes (MMP3, IL-1β). New approaches aim to restore joint mechanics and limit this “mechanotransduced” inflammation.
Recent examples:
Injectable liposomal lubricants: suppress the expression of inflammatory genes induced by shearing.
d) Rebalancing the metabolic environment
Joint inflammation often reflects a systemic imbalance: oxidative stress, hyperglycemia, omega-6/omega-3 imbalance, depleted microbiota.
Holistic approaches:
- Weight loss: according to Messier et al., Arthritis & Rheumatism (2005), every pound lost reduces the mechanical load on the knee by four pounds with each step. This reduction, repeated thousands of times a day, is clinically significant in relieving pain and slowing the progression of osteoarthritis.
- Anti-inflammatory diet: fiber, polyphenols, omega-3, low in fast-acting sugars.
- Regular physical activity: regulates cytokines and cortisol.
- Restorative sleep: sleep debt increases IL-6 and CRP.
“Each pound lost results in a fourfold reduction in the load exerted on the knee with each step during daily activities.”
Learn more about Xelflex for joint health!
Scientific sources :
Osteoarthritis: New Insight on Its Pathophysiology. PMC, 2023
✍️ Unraveling the Molecular Mechanisms of Osteoarthritis. Wiley, 2024
✍️ Targeting of Chondrocyte Plasticity via Connexin 43 Modulation. ArXiv, 2024
✍️ Liposomic Lubricants Suppress Shear-Stress-Induced Inflammatory Gene Regulation in the Joint In Vivo. ArXiv, 2025
✍️ Advances in the Application and Mechanism of Bioactive Peptides. PMC, 2024
✍️ Messier SP et al. Weight loss reduces knee-joint loads in overweight and obese older adults with knee osteoarthritis. Arthritis & Rheumatism, 2005