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Influence of peroral application of a herbal immunomodulator on the antibody production of Peyer's patches cells.

The influence of the peroral administration of the macromolecular components of a herbal immunomodulator isolated from an aqueous-ethanolic extract of the mixed herbal drugs Thujae summitates, Baptisiae tinctoriae radix, Echinaceae purpureae radix and Echinaceae pallidae radix on the function of Peyer's patches cells was investigated in mice. Peyer's patches cells isolated from mice which had received oral administration of the macromolecular fraction of the plant extract developed a significantly enhanced plaque-forming cell (PFC) response to sheep red blood cells after incubation with these cells in the presence of lipopolysaccharide or the extract fraction for 7 days in vitro. These results show that after oral administration of the herbal immunomodulator, the immunologically active macromolecules can contact the cells of the gut-associated lymphoid tissue and modulate the mucosal immune response.