title: Absorption and tissue distribution of an immunomodulatory alpha-D-glucan after oral administration of Tricholoma matsutake.
abstract: Alpha-D-glucan (MPG-1) separated from Tricholoma matsutake (CM6271) has been reported to show immunomodulatory activities. In this study, the plasma concentration and tissue distribution of MPG-1 after CM6271 oral administration were investigated as part of the action mechanism analysis. When CM6271 was orally administered in a single dose to mice, MPG-1 was absorbed via the intestinal tract, appeared in plasma after 16 h, was gradually excreted from the blood, and fell to background level after 48 h. The time course analysis of MPG-1 in plasma showed the following pharmacokinetic parameters of MPG-1: tmax = 24 h; Cmax = 161.1 ng/mL; AUC(0-infinity) = 2559.7 ng x h/mL. Moreover, MPG-1 was confirmed to localize in Peyer's patches, mesenteric lymph nodes (MLN), and the spleen and to promote IL-12 p70 production and NK cell activity. These results suggest that MPG-1 stimulated the intestinal immune system through Peyer's patches; moreover, it was taken into the blood and stimulated the systemic immune system.
authors.affiliation: Biomedical Research Laboratories, Kureha Corporation, 3-26-2 Hyakunin-cho, Shinjyuku-ku, Tokyo 169-8503, Japan. h-hoshi@kureha.co.jp
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Hoshi
authors.forename: Hiroko
authors.initials: H
authors.lastname: Iijima
authors.forename: Yoko
authors.initials: Y
authors.lastname: Ishihara
authors.forename: Tadashi
authors.initials: T
authors.lastname: Yasuhara
authors.forename: Kenichi
authors.initials: K
authors.lastname: Matsunaga
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000818:Animals; D005260:Female; D005936:Glucans / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D007150:Immunohistochemistry; D007155:Immunologic Factors / Q000493:pharmacokinetics*; D007408:Intestinal Absorption; D007700:Kinetics; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D025282:Mycelium / Q000737:chemistry; D014018:Tissue Distribution
chemical_list: D005936:Glucans; D007155:Immunologic Factors