The Framework of Host Innate and Adaptive Immunological Pathways

Area of Science:

• Immunology
• Infectious Disease

Background:

• Host immune responses encompass innate and adaptive immunity, with various subtypes identified, including TH1-TH22 and Vγ9-chain γδ T cells.
• The functional classification of these immune pathways against diverse pathogens is not fully understood.

Purpose of the Study:

• To propose an integrated framework for the functional classification of host innate and adaptive immunological pathways.
• To provide a conceptual basis for addressing infections and hypersensitivity disorders.

Main Methods:

• Categorization of γδ T cells within innate immunity based on pathogen targets (viruses, microorganisms, helminths, insects).
• Description of adaptive immunity reactions, including five eradicable and four tolerable types.
• Association of specific T helper cell subsets (TH3, TH4) with cytokine production (IL-35, IL-32).

Main Results:

• Innate immunity pathways are functionally classified: Vγ2 T cells for anergy/tolerance, Vγ8 for antiviral, Vγ9 for intracellular microbes, Vγ4 for extracellular microbes, Vγ5 for helminths, and Vγ3 for insects.
• Adaptive immunity includes five eradicable and four tolerable immune reactions.
• TH3 and TH4 subsets are linked to IL-35 and IL-32 production, respectively.

Conclusions:

• A precise functional classification of immune pathways offers a framework for understanding host defense mechanisms.
• This classification may enhance strategies for combating infectious diseases and hypersensitivity disorders.