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The traditional Japanese medicine Rikkunshito increases the plasma level of ghrelin in humans and mice

  • Original Article—Alimentary Tract
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Abstract

Purpose

Rikkunshito is a traditional Japanese medicine that is widely used for treating upper gastrointestinal symptoms. Our purpose is to clarify the effect of Rikkunshito on the levels of peptide hormones and cytokines in healthy humans and mice.

Methods

We administered Rikkunshito, 7.5 g per day, to 21 healthy volunteers for 2 weeks and examined the changes in plasma peptide and hormone levels. In mice, we administered free access to water containing 0, 0.7, 1.1, and 1.4% Rikkunshito for 2 weeks and examined the changes in plasma peptide levels and ghrelin mRNA expression levels in the stomach.

Results

Plasma acylated ghrelin levels at 0, 2, and 6 weeks after the start of administration were 6.7 ± 2.8, 11.7 ± 4.0, and 10.5 ± 4.4 fmol/ml, respectively. The levels at 2 and 6 weeks were significantly higher than that at 0 time (p < 0.01, paired t test). The levels of interleukin 4, interferon γ, and granulocyte colony-stimulating factor in plasma decreased significantly (p < 0.01) after the administration of Rikkunshito. In mice, the levels of plasma acylated ghrelin changed in proportion to the concentration of Rikkunshito in drinking water, and it was revealed by quantitative RT-PCR that the ghrelin mRNA expression level in the stomach was up-regulated.

Conclusion

Rikkunshito increased the plasma acylated ghrelin level in healthy volunteers and normal mice. Additionally, this change was maintained for at least 4 weeks after the end of administration. In mice, Rikkunshito increased the ghrelin mRNA expression level in the stomach.

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Abbreviations

GH:

Growth hormone

FD:

Functional dyspepsia

GHRL:

Ghrelin prepropeptide

GOAT:

Ghrelin o-acyltransferase

GAPDH:

Glyceraldehyde-3-phosphate dehydrogenase

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Authors and Affiliations

  1. Department of Medicine and Clinical Oncology (K1), Graduate School of Medicine, Chiba University, Inohana 1-8-1, Chiba, 260-8670, Japan

    Tomoaki Matsumura, Makoto Arai, Yutaka Yonemitsu, Daisuke Maruoka, Takeshi Tanaka, Takuto Suzuki, Masaharu Yoshikawa, Fumio Imazeki & Osamu Yokosuka

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  1. Tomoaki Matsumura
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  2. Makoto Arai
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  3. Yutaka Yonemitsu
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  4. Daisuke Maruoka
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  5. Takeshi Tanaka
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  9. Osamu Yokosuka
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Correspondence to Makoto Arai.

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Matsumura, T., Arai, M., Yonemitsu, Y. et al. The traditional Japanese medicine Rikkunshito increases the plasma level of ghrelin in humans and mice. J Gastroenterol 45, 300–307 (2010). https://doi.org/10.1007/s00535-009-0166-z

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  • DOI: https://doi.org/10.1007/s00535-009-0166-z

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