IFNG and autoimmune polyendocrinopathy: Results found that APS injection at 2 or 4 mg in ovo significantly enhanced VH and VH/CD ratio, increased IgA+ cells population and sIgA content, and enhanced mRNA expressions of interleukin (IL)-2, IL-4, interferon gamma (IFN-γ), and Toll-like receptor (TLR)-4 (99).