Mechanistic Pathways · 9 min read · 2027-11-04
Spirulina and Innate Lymphoid Cells
A parallel immune system. ILCs mirror T-helper subsets but respond without antigen-specific recognition.
The Three ILC Lineages
ILCs are tissue-resident lymphocytes lacking antigen-specific receptors. ILC1 (T-bet+, IFN-γ-producing) parallels Th1 in antiviral and antitumor immunity. ILC2 (GATA3+, IL-5/IL-13-producing) parallels Th2 in allergy and parasitic responses. ILC3 (RORγt+, IL-17/IL-22-producing) parallels Th17 in mucosal immunity.
Imbalance Drives Disease
ILC2 expansion drives asthma; ILC3 imbalance contributes to IBD; ILC1 depletion impairs viral defense. Spirulina's inflammation reduction normalizes ILC ratios: ILC2 reduction in allergic airways, ILC3 support for gut barrier (via AhR ligands — covered separately), and preserved ILC1 surveillance function.
Conclusion
Spirulina's ILC modulation parallels its T-helper subset effects but operates in the innate tissue-resident arm. Clinical relevance to asthma, IBD, and mucosal immunity. Combined with adaptive immune effects, spirulina engages immune homeostasis at multiple lineage levels.
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