Yamashita A, Ohtsuka H, Maeda H. Intestinal absorption and urinary excretion of antitumor peptidomannan KS-2 after oral administration in rats.
IMMUNOPHARMACOLOGY 1983;
5:209-20. [PMID:
6832961 DOI:
10.1016/0162-3109(83)90028-0]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A peptidomannan fraction designated as KS-2 was subjected for distribution study after oral administration. KS-2, exhibiting antitumor- and interferon-inducing action, was isolated from hot water extracts of mycelia of Basidiomycetes. For this purpose, KS-2 was labelled with fluorescein isothiocyanate. The amount and location of the labelled KS-2 (F-KS) was determined quantitatively by fluorescence intensity, and the molecular sizes were estimated by the fluorescence polarization method. The present data indicated that F-KS, when given orally, was absorbed partially via portal vein and intestinal lymphatics into the general circulation with intact molecular size. Moreover, F-KS was recovered in urine with concomitant breakdown in molecular weight. Histological evaluation revealed that F-KS was accumulated in the mesenteric lymph nodes, Peyer's patches, spleen, liver, and kidneys. These findings provide evidence that the polysaccharide KS-2 becomes accessible to the immune tissues and the vascular system; thus it may exert potentiating activity of defense system.
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