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A Comparison of the Effects of Several Agents Found in Common Foodstuffs on Cholecystokinin‐induced Tension in Guinea Pig Gallbladder Strips
Author(s) -
Kline Loren
Publication year - 2020
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.2020.34.s1.00115
Subject(s) - chrysin , luteolin , chemistry , quercetin , cholecystokinin , pharmacology , resveratrol , curcumin , guinea pig , flavonoid , biochemistry , endocrinology , medicine , antioxidant , receptor
17beta‐estradiol (E2) has an inhibitory effect on the contractility of gastrointestinal smooth muscle, including the gallbladder. The inhibition of extracellular Ca 2+ entry mediated E2‐induced relaxation of either CCK‐ or KCl‐induced tension in male and female guinea pig gallbladder strips. Chrysin, an endocrine disrupter, and luteolin are flavones. Resveratrol is a non‐flavonoid phytoestrogen, quercetin a phytoestrogen, and curcumin a diarylheptanoid. All are natural constituents of common foodstuffs. All relaxed CCK‐induced tension in male guinea pig gallbladder strips. Luteolin, quercetin, curcumin, resveratrol, and chrysin relaxed the CCK‐induced tension in the gallbladder strips by blocking extracellular Ca 2+ entry and intracellular Ca 2+ release. The effect of luteolin was also mediated by the PKA/cAMP system while quercetin also involved NO. In addition to the Ca 2+ effects, the effects of curcumin and chrysin involved the PKC system. The purpose of this study was to determine which of these agents was most potent in relaxing the CCK‐induced tension in gallbladder strips. Luteolin was the most potent (98.2±2.0%), chrysin (45.4±3.7%), resveratrol (41.1±4.0%), quercetin (42.9±3.0%), curcumin (39.4±4.0%), and E2 (64.5±2.3%) when using 50 mM of each agent. Luteolin had the largest effect at all the other concentrations used (10, 25, 50, and 100 mM) in relaxing CCK‐induced tension. Curcumin was the least potent. There was no significant difference in the amount of relaxation induced by chrysin, resveratrol, and quercetin were compared. The effect of E2 was second only to luteolin. Support or Funding Information This research did not receive any specific grant from funding agencies in the public, commercial, or not‐for‐profit sectors.