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Pharm Biol. 2016;54(6):1065-70. doi: 10.3109/13880209.2015.1102948. Epub 2015 Oct 29.

Antimicrobial effect of the extracts from Hypericum perforatum against oral bacteria and biofilm formation.

Author information

1
a Department of Pharmacognosy ;
2
b Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Gazi University , Ankara , Turkey.

Abstract

CONTEXT:

One traditional medicines, Hypericum perforatum L. (Hypericaceae), possesses several beneficial effects against depression, ulcers, dyspepsia, abdominal pains, burns, bacterial infections, migraine headaches, and sciatica.

OBJECTIVE:

The present study investigates the antimicrobial activity of the ethanol extract (HP-EtOH) of H. perforatum and its sub-extracts, namely n-hexane (HP-hexane), chloroform (HP-CHCl3), ethyl acetate (HP-EtOAc), n-butanol (HP-n-BuOH), and water (HP-H2O) extracts, against Streptococcus mutans, S. sobrinus, Lactobacillus plantarum, and Enterococcus faecalis.

MATERIALS AND METHODS:

For the evaluation of the antimicrobial activity, flowering aerial parts of H. perforatum were extracted with EtOH and then this extract was fractionated to obtain five sub-extracts in different polarities. Antimicrobial activities of HP-EtOH and its sub-extracts against Streptococcus mutans, S. sobrinus, L. plantarum, and E. faecalis were assessed by using colorimetric micro-well dilution at concentration ranges of 64-0.5 μg/ml as well as resazurin microplate and modified microtiter-plate assays between the ranges of 100 and 0.78125 μg/ml.

RESULTS:

According to the results of the present study, HP-H2O sub-extract displayed strong antibacterial activity (MIC values 8 μg/mL) against S. sobrinus and L. plantarum, and exerted moderate activity against S. mutans and E. faecalis at 32 and 16 μg/mL concentrations, respectively. Other sub-extracts also demonstrated antimicrobial activity against S. sobrinus at a concentration of 16 μg/mL. HP-EtOAc and HP-n-BuOH showed antimicrobial activity against L. plantarum and HP-EtOAc and HP-H2O were also active against E. faecalis at the same concentrations (16 μg/mL).

CONCLUSION:

According to the results, we suggest that H. perforatum could be employed as a natural antibacterial agent in oral care products.

KEYWORDS:

Antimicrobial activity; Hypericaceae; medicinal plants; oral hygiene

PMID:
26510970
DOI:
10.3109/13880209.2015.1102948
[Indexed for MEDLINE]

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