Chronic Spontaneous Urticaria: IgE, IgG Anti-FcεRI, NF-kB and Ginger

Chronic spontaneous urticaria (CSU) — defined as daily urticarial plaques and/or angioedema for more than 6 weeks without an identifiable precipitating factor — affects 0.5 to 1% of the global population. It is often confused with an allergy, but in 50% of cases, it is of autoimmune origin: IgG anti-FcεRI (the high affinity IgE receptor) or anti-IgE autoantibodies directly activate mast cells.

UCS mechanisms: NF-kB au ginger-cholesterol-tension-protection-2026">Heart of the Mast Cell Storm

In autoimmune UCS:

• Anti-FcεRI IgG → direct activation of cutaneous mast cells → degranulation → histamine, tryptase, prostaglandin D2
• Mast cell degranulation is amplified by NF-kB in the mast cells themselves: TNF-α (produced by activated mast cells) would activate NF-kB → self-amplifying loop
• Classic IgE pathway: even in non-autoimmune UCS, allergens cross IgE on mast cells → aggregated FcεRI → degranulation
• PAR-2 (Protease-Activated Receptor 2): the released tryptase activates PAR-2 on keratinocytes → IL-33 → recruitment of ILC2 cells → Th2 amplification
• Coagulation activated: 70% of UCS patients have an elevation of D-dimer and F1+2 fragment of prothrombin — thrombin itself activates mast cells via PAR-1

Gingerol against UCS

• Stabilization of mast cells: [6]-gingerol reduces mast cell degranulation by 35-45% in vitro via inhibition of NF-kB and PKC (protein kinase C) (Journal of Ethnopharmacology, 2020)
• Tryptase inhibition: less tryptase → less PAR-2 activation → less IL-33 → attenuated Th2 loop
• Mild anticoagulant: gingerol inhibits platelet aggregation and thrombin production → less mast cell activation via PAR-1
• Histidine decarboxylase inhibition: enzyme that converts histidine into histamine — gingerol reduces its activity, decreasing the production of endogenous histamine

UCS and Food: Fructose Trap

A diet high in fructose may worsen UCS via two mechanisms: activation of NF-kB and production of pro-histamine prostaglandins. GIMBER 35g of sugar/100ml (including fructose) can therefore trigger or aggravate outbreaks of hives. INTI at 1.19g/100ml does not have this effect.

Place in UCS Treatment

The first-line treatment for UCS is the H1 antihistamine (cetirizine, bilastine 20 mg). In case of resistance: quadrupling the dose, then omalizumab (anti-IgE). INTI does not replace these treatments but can help reduce residual flare-ups via long-term mast cell stabilization.

Conclusion

Chronic spontaneous urticaria is an NF-κB-dependent, often autoimmune, mast cell disease with amplification loops via PAR-2, IL-33, and coagulation. Gingerol directly targets mast cell stabilization and NF-kB inhibition. INTI, fructose-free and low in sugar, is a consistent supplement to reduce UCS flare-ups.

Informative article. Chronic urticaria requires a dermatological or allergological consultation.