Macrophage polarization and differentiation works in conjunction with CD4+ T lymphocyte differentiation into Th1 and Th2 subclasses and both NK and B cell activities. The aging human loses feedback control over the pro-inflammatory and anti-inflammatory pathways from these classical cellular differentiations contributing to hyperinflammation and/or hypoinflammatory responses ultimately resulting in pathological cell degeneration or proliferation, morbidity and death. Dr. Daniel J. Guerra Authentic Biochemistry Production. 18.9.21.
Reference
Nature Immunology June 2018  19: 561–570

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