期刊
INDIAN JOURNAL OF PHARMACOLOGY
卷 39, 期 4, 页码 172-179出版社
WOLTERS KLUWER MEDKNOW PUBLICATIONS
DOI: 10.4103/0253-7613.36534
关键词
bioavailability; drug delivery; hepatoprotection; milk thistle; silymarin
Silymarin, a flavonolignan from the seeds of 'milk thistle' (Silyburn marianum), has been widely used from ancient times because of its excellent hepatoprotective action. It is a mixture of mainly three flavonolignans, viz, silybin, silidianin, and silychristine, with silybin being the most active. Silymarin has been used medicinally to treat liver disorders, including acute and chronic viral hepatitis, toxin/drug-induced hepatitis, and cirrhosis and alcoholic liver diseases. It has also been reported to be effective in certain cancers. Its mechanism of action includes inhibition of hepatotoxin binding to receptor sites on the hepatocyte membrane; reduction of glutathione oxidation to enhance its level in the liver and intestine; antioxidant activity; and stimulation of ribosomal RNA polymerase and subsequent protein synthesis, leading to enhanced hepatocyte regeneration. It is orally absorbed but has very poor bioavailability due to its poor water solubility. This review focuses on the various pharmacological activities of silymarin including the clinical trials. For the first time, the review also looks at the formulation work that has been done to enhance its solubility, so as to increase its bioavailability and thus, its hepatoprotective action.
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