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Research ArticleGASTROINTESTINAL, HEPATIC, PULMONARY, AND RENAL

Ginger Reduces Hyperglycemia-Evoked Gastric Dysrhythmias in Healthy Humans: Possible Role of Endogenous Prostaglandins

Sutep Gonlachanvit, Yen Hsueh Chen, William L. Hasler, Wei Ming Sun and Chung Owyang
Journal of Pharmacology and Experimental Therapeutics December 2003, 307 (3) 1098-1103; DOI: https://doi.org/10.1124/jpet.103.053421
Sutep Gonlachanvit
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Yen Hsueh Chen
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William L. Hasler
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Wei Ming Sun
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Chung Owyang
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Abstract

Acute hyperglycemia evokes gastric slow wave dysrhythmias via endogenous prostaglandin generation. Ginger exhibits slow wave antiarrhythmic effects in other models, but its actions on hyperglycemia-evoked gastric dysrhythmias are unexplored. We hypothesized that ginger prevents disruption of slow wave rhythm by acute hyperglycemia via inhibition of prostaglandin production but not its actions. Twenty-two healthy humans underwent fasting electrogastrography during hyperglycemic clamping to 250 to 290 mg/dl after double-blind placebo or ginger root (1 g). Responses were compared with the prostaglandin E1 analog misoprostol (400 μg). Dominant frequencies (DF) and the percentage of recording times in the bradygastric [0.5–2 cycles/min (cpm)], normal (2–4 cpm), and tachygastric (4–9 cpm) frequency ranges were analyzed. After placebo, hyperglycemia reduced normal 2 to 4 cpm activity from 94.4 ± 2.6 to 66.0 ± 10.4%, increased the DF from 2.96 ± 0.04 to 4.09 ± 0.45 cpm, and increased tachygastria from 2.0 ± 1.4 to 29.3 ± 10.7% (P < 0.05). Hyperglycemia effects on normal activity (77.3 ± 8.3%), DF (3.46 ± 0.37 cpm), and tachygastria (15.6 ± 8.6%) were significantly reduced by ginger (P < 0.05). Misoprostol evoked decreases in normal activity from 95.4 ± 2.0 to 81.7 ± 3.0% and increases in tachygastria from 3.1 ± 1.6 to 11.2 ± 2.4% (P < 0.05). However, ginger did not correct these abnormalities versus placebo (P = N.S.). In conclusion, acute hyperglycemia evokes gastric slow wave dysrhythmias that are prevented by ginger root. Conversely, the compound has no effect on dysrhythmias elicited by a prostaglandin E1 analog, indicating that ginger likely acts to blunt production of prostaglandins rather than inhibiting their action. These findings suggest novel mechanisms for the traditional Chinese herbal remedy ginger.

Footnotes

  • This study was supported in part by National Institutes of Health Grants 1 K24 DK02726-01, R01-DK-35783, and P30-DK-34933.

  • DOI: 10.1124/jpet.103.053421.

  • ABBREVIATIONS: EGG, electrogastrographic; cpm, cycles per minute; 5-HT3, 5-hydroxytryptamine3.

    • Received April 24, 2003.
    • Accepted August 21, 2003.
  • The American Society for Pharmacology and Experimental Therapeutics
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Journal of Pharmacology and Experimental Therapeutics: 307 (3)
Journal of Pharmacology and Experimental Therapeutics
Vol. 307, Issue 3
1 Dec 2003
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Research ArticleGASTROINTESTINAL, HEPATIC, PULMONARY, AND RENAL

Ginger Reduces Hyperglycemia-Evoked Gastric Dysrhythmias in Healthy Humans: Possible Role of Endogenous Prostaglandins

Sutep Gonlachanvit, Yen Hsueh Chen, William L. Hasler, Wei Ming Sun and Chung Owyang
Journal of Pharmacology and Experimental Therapeutics December 1, 2003, 307 (3) 1098-1103; DOI: https://doi.org/10.1124/jpet.103.053421

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Research ArticleGASTROINTESTINAL, HEPATIC, PULMONARY, AND RENAL

Ginger Reduces Hyperglycemia-Evoked Gastric Dysrhythmias in Healthy Humans: Possible Role of Endogenous Prostaglandins

Sutep Gonlachanvit, Yen Hsueh Chen, William L. Hasler, Wei Ming Sun and Chung Owyang
Journal of Pharmacology and Experimental Therapeutics December 1, 2003, 307 (3) 1098-1103; DOI: https://doi.org/10.1124/jpet.103.053421
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