alexa Effect of silymarin on biliary bile salt secretion in the rat.
Pharmaceutical Sciences

Pharmaceutical Sciences

Medicinal & Aromatic Plants

Author(s): Crocenzi FA, Pellegrino JM, Snchez Pozzi EJ, Mottino AD, Garay EA,

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Abstract The effect of the hepatoprotector silymarin on bile secretion, with particular regard to bile salt secretion, was studied in Wistar rats. Silymarin (25, 50, 100, and 150 mg/kg/day, i.p., for 5 days) induced a dose-dependent increase in bile flow and bile salt secretion, the maximal effect being reached at a dose of 100 mg/kg/day (+17 and +49\%, for bile flow and bile salt output, respectively; P < 0.05). Assessment of bile salt composition in bile revealed that stimulation of the bile salt secretion was accounted for mainly by an increase in the biliary secretion of beta-muricholate and, to a lesser extent, of alpha-muricholate, chenodeoxycholate, ursodeoxycholate, and deoxycholate. The maximum secretory rate (T(m)) of bile salts, as assessed by infusing the non-hepatotoxic bile salt tauroursodeoxycholate i.v. at stepwise-increasing rates, was not influenced by silymarin. The flavonolignan also increased the endogenous bile salt pool size (+53\%, P < 0.05) and biliary bile acid excretion after bile acid pool depletion (+54\%, P < 0.05), a measure of de novo bile salt synthesis. These results suggest that silymarin increases the biliary excretion and the endogenous pool of bile salts by stimulating the synthesis, among others, of hepatoprotective bile salts, such as beta-muricholate and ursodeoxycholate.
This article was published in Biochem Pharmacol and referenced in Medicinal & Aromatic Plants

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