Article Publish Status: FREE
Abstract Title:

In vitro antimicrobial and modulatory activity of the natural products silymarin and silibinin.

Abstract Source:

Biomed Res Int. 2015 ;2015:292797. Epub 2015 Mar 11. PMID: 25866771

Abstract Author(s):

Dayanne Rakelly de Oliveira, Saulo Relison Tintino, Maria Flaviana Bezerra Morais Braga, Aline Augusti Boligon, Margareth Linde Athayde, Henrique Douglas Melo Coutinho, Irwin Rose Alencar de Menezes, Roselei Fachinetto

Article Affiliation:

Dayanne Rakelly de Oliveira


Silymarin is a standardized extract from the dried seeds of the milk thistle (Silybum marianum L. Gaertn.) clinically used as an antihepatotoxic agent. The aim of this study was to investigate the antibacterial and antifungal activity of silymarin and its major constituent (silibinin) against different microbial strains and their modulatory effect on drugs utilized in clinical practice. Silymarin demonstrated antimicrobial activity of little significance against the bacterial strains tested, with MIC (minimum inhibitory concentration) values of 512µg/mL. Meanwhile, silibinin showed significant activity against Escherichia coli with a MIC of 64 µg/mL. The results for the antifungal activity of silymarin and silibinin demonstrated a MIC of 1024 µg/mL for all strains. Silymarin and silibinin appear to have promising potential, showing synergistic properties when combined with antibacterial drugs, which should prompt further studies along this line.

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