| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a novel intestinal tract immunoactivator and an antiallergic agent based on intestinal tract immunoactivating actions. <P>SOLUTION: The intestinal tract immunoactivator comprises as an effective ingredient a white sweet potato (Ipomoea Batatas L.), preferably peelings and/or tuberous roots of the sweet potato or comprises as an effective ingredient extracts of the white sweet potato or of peelings and/or tuberous roots thereof, concretely arabinogalactan that has a skeleton composed of a β-1,6-bonded Gal sugar chain highly branched through a β-1,3-bond, where the Gal constituting the skeleton contains, as side chains bonded thereto, (1) αAraf bonded via an α-1,3-bond or (2) αAraf(1→5)αAraf bonded via an α-1,3-bond and (3) αRha(1→4)βGlcUA bonded via a β-1,6-bond to a part or all of the terminal Gal of the skeleton and has an average molecular weight of 100,000-200,000, preferably around 130,000-150,000, and has a rhamnose:glucuronic acid constitution ratio of nearly 1:1, an arabinose:galactose constitution ratio of nearly 1:2 and a rhamnose:arabinose constitution ratio of 1:(5-6). <P>COPYRIGHT: (C)2008,JPO&INPIT |
