Just the normal joint aches and pains to be expected with each passing year…
Osteoarthritis (OA) is a chronic degenerative joint disease characterized by articular cartilage destruction. The pathological mechanisms are complex; in par...
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“Lipopolysaccharide (LPS)-induced chondrocytes… we found that LPS stimulation significantly inhibited autophagy, induced chondrocyte apoptosis and extracellular matrix (ECM) degradation…” 
When cartilage cells are exposed to cumulative amounts of endotoxin, say, from thousands of symptom free injections of small amounts of bacteria over years, they ‘turn off’ self-repair, start dying more, and break down their surrounding matrix, key features of joint damage.