The prevalence of allergic diseases such as asthma, allergic rhinitis and atopic dermatitis has increased all over the world during the last two decades. Dietary change is supposed to be associated with this increase. If it is the case, an appropriate intake of foods or drinks with anti-allergic functions is expected to stop the increase. Flavonoids, ubiquitously present in vegetables, fruits or teas possess anti-allergic activities. Flavonoids inhibit histamine release, synthesis of IL-4 and IL-13 and CD40 ligand expression by basophils and mast cells. Analyses of structure-activity relationships of representative flavones showed that luteolin, apigenin and fisetin were the strongest inhibitors of IL-4 production with an IC₅₀ value of 2–5 μM and determined a fundamental structure for the inhibitory activity. Quercetin and kaempferol showed a substantial activity with an IC₅₀ value of 15–18 μM. The inhibitory activity of flavonoids on IL-4 and CD40 ligand expression were thought to be mediated through their inhibitory action on activation of nuclear factor of activated T cells and AP-1. Administration of flavonoids into atopic dermatitis-prone mice prevented the onset of dermatitis and serum IgE elevation and ameliorated the severity of dermatitis even after the onset. In addition a preliminary trial of flavonoids for adult patients with atopic dermatitis showed a significant effect. Recent epidemiological studies reported that a low incidence of asthma was significantly observed by population with a high intake of flavonoids. Thus, these evidences will be helpful for the development of low molecular compounds for allergic diseases and it is expected that an appropriate daily intake of flavonoids may be an effective complementary and alternative medicine and a preventative strategy for allergic diseases.

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We evaluated the anti-tumor activity of fermented grain extracts using a mouse tumor model. An experimental diet containing materials from fermented rice germ, wheat germ, hulled rice, soybean and seaweed (fermented materials, FM) was fed to 4-week-old female C57BL6 mice for 14 days prior to and 21 days following the subcutaneous implantation of B16 melanoma (5×10 ⁵ cells/mouse). FM retarded tumor growth and increased the duration of host survival. We further examined the anti-tumor activity of FM using the B16 metastasis model. An experimental diet containing FM was fed to C57BL6 mice for 14 days prior to and 21 days following B16 tail vein administration (5×10⁴ cells/mouse). The decrease in observed metastasis in the lungs of mice treated with FM was also significant. In order to identify this anti-tumor activity of FM, NK-activity in the FM fed mice was evaluated. However, the values were comparable to the control mice. These results suggest that the fermented grain extracts induce anti tumor activity in vivo, although the mechanism of this activity is not yet clear.

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We examined the clinical effect of a functional food containing both soy isoflavone and black cohosh extract (test food) on Simplified Menopausal Index (SMI) in a double blind study. Twenty four peri-menopausal women were divided into two groups and four capsules of either the test food or placebo were ingested everyday for eight weeks. The daily intakes of soy isoflavone and black cohosh extract were 50.0 mg and 80.0 mg respectively. As compared with placebo group, the scores of menopausal symptoms such as “stiff neck” and “backache” significantly improved (p<0.05), and the score of “irritation” tended to improve in test food group but not significant statistically. When these results were stratified according to the severity of pretrial menopausal symptoms, the effects of test food were shown to be more effective in mild case group. These results suggest that the functional food containing soy isoflavone and black cohosh extract alleviate menopausal disturbances and improve the quality of life for peri-menopausal women.

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The cancer patients and their families needed accurate, useful information on the complementary and alternative medicine of cancer. Therefore, the guidebook for the complementary and alternative medicine in cancer treatment was made for them and it is thought that they can use the complementary and alternative treatments well by this guidebook. Moreover, it introduced the outline of the cancer research of the complementary and alternative medicine by Grants-in-Aid for Cancer from the Ministry of Health Labour and Welfare of Japan.

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We had the opportunities to visit some centers of CAM in the United States twice, on May & September, in 2005. Those are National Center of CAM (NCCAM) and Office of Cancer CAM (OCCAM) in Maryland. Further, as the cancer center, we visited the University of California at Davis and the University of Texas MD Anderson Hospital.
We also introduce regarding the 2^nd International Conference of Integrative Oncology which was held at San Diego on November in 2005.

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