Knowledge · Nutrition
Secretory IgA (sIgA): polymeric immunoglobulin receptor (pIgR) transcytosis, immune exclusion of pathogens, and symbiosis with commensal microbiota
How secretory IgA is assembled and transported across the epithelium, how it can limit pathogens while supporting some commensals, and why stool sIgA alone is not a diagnosis or treatment target.