IL-6: Interleukin-6

IL-6 (Interleukin-6) is a pleiotropic cytokine, central to the acute phase response (CRP, fibrinogen, ferritin). It is a major player in polymyalgia rheumatica (PMR), giant cell arteritis (Horton's disease), severe COVID, and numerous inflammatory conditions. It is the therapeutic target of tocilizumab (anti-IL-6R).

Characteristics

• gp130 family cytokine
• Receptor: IL-6R + glycoprotein 130 (gp130)
• Production: macrophages, T cells, fibroblasts, adipocytes
• Signaling pathway: JAK1/JAK2 → STAT3

Biological Role

• Acute phase response: induces CRP, fibrinogen, hepcidin, ferritin at the hepatic level
• Differentiation of Th17 → maintenance of autoimmune diseases
• Osteoclast activation → inflammatory osteoporosis
• Chronic inflammation → cachexia, sarcopenia

Diseases with elevated IL-6

• Polymyalgia rheumatica (PMR) — IL-6 is the central marker
• Horton's disease (giant cell arteritis)
• Rheumatoid arthritis
• Castleman disease
• Severe COVID-19 ("cytokine storm")
• Cancer cachexia

Natural Inhibitors

• [6]-gingerol: ↓ IL-6 by 40-60% in activated macrophages
• Curcumin: directly inhibits the JAK/STAT3 pathway
• Piperine: potentiates curcumin
• Resveratrol, omega-3 EPA/DHA

IL-6 and INTI

IL-6 inhibition is one of the most documented effects of ginger + turmeric. INTI targets this pathway through several complementary mechanisms.