- 著者
- Tadashi KIHO Shigeyuki USUI Kazuyuki HIRANO Koichi AIZAWA Takahiro INAKUMA
- 出版者
- Japan Society for Bioscience, Biotechnology, and Agrochemistry
- 雑誌
- Bioscience, Biotechnology, and Biochemistry (ISSN:09168451)
- 巻号頁・発行日
- vol.68, no.1, pp.200-205, 2004 (Released:2004-01-24)
- 参考文献数
- 31
- 被引用文献数
- 70
A water-soluble and low-molecular-weight fraction (SB) was obtained from tomato paste. The effects of SB on the formation of advanced glycation end-products (AGE) in protein glycation were studied by the methods of specific fluorescence, ELISA and a Western blot analysis, using the anti-AGE antibody after incubating protein with sugar. The results suggest that SB had strong inhibitory activity, in comparison with aminoguanidine as a positive control, and that the inhibitory mechanism of SB differed from that of aminoguanidine to involve trapping of reactive dicarbonyl intermediates in the early stage of glycation. SB contained an antioxidant, rutin, which showed potent inhibitory activity. The results also suggest that rutin chiefly contributed to inhibiting the formation of AGE, and that other compounds in SB may also have been related to the activity.
- 著者
- TADASHI KIHO MASAHIKO ITO KATSUYUKI NAGAI CHIHIRO HARA SHIGEO UKAI
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Chemical and Pharmaceutical Bulletin (ISSN:00092363)
- 巻号頁・発行日
- vol.35, no.10, pp.4286-4293, 1987-10-25 (Released:2009-10-19)
- 参考文献数
- 34
- 被引用文献数
- 8 11
A water-insoluble glucan (N-5P), [α] 23D +2.3° (c= 0.51, 0.5 M sodium hydroxide), was isolated from the alkaline extract of the fruit bodies of Yu er (Chinese name) (Auricularia species). N-5P was homogeneous as judged by gel filtration and electrophoresis. By gel filtration, the molecular weight of N-5P was estimated to be 5.6 × 105. The 13C-nuclear magnetic resonance and infrared spectra, together with the result of chromium trioxide oxidation, indicated that glucosidic linkages in N-5P have the β-D configuration. From the results of methylation analysis, periodate oxidation, Smith degradation (complete, as well as partial), partial acetolysis, and enzymic hydrolysis, it was concluded that N-5P has a main chain composed of β- (1→3) -linked D-glucopyranosyl residues, with single, β- (1→6) -linked D-glucopyranosyl groups attached as side chains, which account for a quarter of the total sugar residues. In addition, the results of enzymic hydrolysis indicated that the β- (1→6) -linked D-glucosyl side chains are mainly localized in the neighborhood of the nonreducing end of the main chain. Furthermore, N-5P showed potent antitumor activity against the solid form of sarcoma 180 in mice, and exhibited significant carbon clearance-enhancing activity in mice.