Eiichi Tahara

Effect of Shimotsu-to (a Kampo medicine, Si-Wu-Tang) and its constituents on triphasic skin reaction in passively sensitized mice.

Previous studies have reported that mice passively sensitized with anti-DNP (dinitrophenol) IgE antibody exhibited IgE-mediated skin reaction with an immediate phase response (IPR) at 1 h and a late phase response (LPR) at 24 h after the challenge of DNFB (dinitrofluorobenzene). We recently found that a third phase inflammatory reaction with intense and persisting infiltration of eosinophils, named very late phase response (vLPR), was induced by DNFB challenge peaking at 8 days. In this study, we examined the effects of a Kampo medicine, Shimotsu-to (Si-Wu-Tang), and its constituent crude drugs on triphasic skin reaction in passively sensitized mice. Shimotsu-to inhibited ear swelling in LPR and vLPR after DNFB challenge in a dose-dependent manner, and slightly diminished the scratching behavior considered to be associated with pruritus in IPR. The inhibitory effect on LPR and vLPR was partly due to Cnidii Rhizoma (Senkyu) in Shimotsu-to formulation, especially its fraction 5 containing cnidilide. On the other hand, Angelicae Radix (Toki) rather than Cnidii Rhizoma (Senkyu) in Shimotsu-to, inhibited the scratching behavior, although it did not inhibit the ear swelling in IPR. These findings indicate that the Shimotsu-to formulation is useful for the inhibition of cutaneous inflammatory diseases.

Differential Effect of Antiallergic Drugs on IgE-Mediated Cutaneous Reaction in Passively Sensitized Mice

We investigated the effect of several antiallergic agents on murine IgE-mediated biphasic cutaneous reaction. Mice were passively sensitized by an intravenous injection of monoclonal anti-dinitrophenol (anti-DNP) IgE antibody. Skin reaction was elicited by an epicutaneous challenge of dinitrofluorobenzene (DNFB) and occurred biphasically with immediate-phase response (IPR) and late-phase response (LPR) at 1 and 24 h, respectively. Classical histamine H1 receptor antagonists and some chemical mediator-release inhibitors, such as diphenhydramine and terfenadine, inhibited IPR, but not LPR. In contrast, leukotriene B4 (LTB4) receptor antagonist (ONO-4057) inhibited LPR only. Antagonists for LTC4, D4, E4 receptor (ONO-1078) and platelet-activating factor (PAF) receptor (Y-24180) significantly inhibited both IPR and LPR, similarly to prednisolone. We recently found that a third-phase inflammatory reaction with marked infiltration of eosinophils (named very-late-phase response; vLPR), which is supposed to be a more important reaction in allergic diseases, was induced, peaking at day 8 following IPR and LPR in this model. The effect of these drugs on the triphasic skin reaction can be scored based on efficacy against IPR / LPR / vLPR; +/+/+ (prednisolone, a PAF receptor antagonist Y-24180, cyclosporin A and FK-506), +/–/– (diphenhydramine), +/+/– (azelastine and LT receptor antagonist ONO-1078), and –/+/+ (an LTB4 receptor antagonist ONO-4057). Thus the inhibitory effect on vLPR as well as LPR may relate to the inhibition of eosinophil function mediated by LTB4 and PAF and/or T cells. These findings may provide the basis for a treatment modality using various antiallergic agents in allergic disease.

Assessment of effects of traditional herbal medicines on elderly patients with weakness using a self‐controlled trial

Background:  The objectives of this study were to evaluate the effects of traditional herbal medicine on elderly patients with weakness, and to devise a suitable study design for assessing the clinical effectiveness of traditional herbal medicines.

A Case of Granuloma Annulare Successfully Treated with a Combination of Orengedokuto and Maobushisaishinto

受付:2013年6月3日,受理:2013年8月16日 Abstract A 68-year-old female had been diagnosed with granuloma annulare a year earlier. She was prescribed tranilast and was recovering, but had to discontinue the tranilast because she suffered liver damage as a side effect. She was also suffering from a worsening rash and so decided to try Kampo medicine. We prescribed orengedokuto because of thermal symptoms suggestive of hot flushes, the appearance of her tongue, and the character of her rash. Initially, the rash improved, but from the 3rd day following admission did not change greatly. We suspected the existence of interior cold and started combining maobushisaishinto. Five days later, the granulomas had rapidly shrunk. We believe she had overlapping diseases of a yin and yang pattern from the fact that she improved clinically.