[#1988-03] Distribution of Grifolan NMF-5N (I/B), a Chemically Modified Antitumor β- Glucan in Mice, T. Takeyama et al.
Distribution of Grifolan NMF-5N (I/B), a Chemically Modified Antitumor β- Glucan in Mice
Takahiro TAKEYAMA, Iwao SUZUKI, Naohito OHNO,* Shozo OIKAWA, Kichiro SATO, Masumi OHSAWA,** and Toshiro YADOMAE*
Tokyo College of Pharmacy, * Horinouchi, Hachioji, Tokyo, 192-03, Japan and Nippon Beet Sugar Mfg., Co., Ltd., ** Chuo-ku, Tokyo, 104, Japan
The distribution of a 3H-labeled chemically modified antitumor β-glucan, grifolan ( from maitake ) NMF-5N (I/B), in various tissues after an injection into mice was examined in order to obtain information on distribution of the parent antitumor β-glucan, grifolan NMF-5N. Grifolan NMF-5N was treated with sodium metaperiodate and sodium borotritide to obtain tritium-labeled grifolan NMF-5N [3H-grifolan (I/B)]. When 3H-grifolan (I/B) was administered into normal mice by intraperitoneal (i.p.) or intravenous (i.v.) injection, radioactivity was detected in various mouse tissues. Next, 3H-grifolan (I/B) was injected into tumor-bearing mice 7 d after the tumor inoculation, which is the most effective administration timing for the antitumor effect of grifolan NMF-5N. The results indicated a strong radioactivity in spleens and tumor masses.
These results suggested a close relationship between the antitumor activity and the distribution of grifolan NMF-5N in mice.
