Abstract:
BACKGROUND:Plants are considered as promising sources of new antibacterial agents as well as bioassay guided fractionation. OBJECTIVES:In the present work, the antibacterial properties, especially against methicillin-resistant Staphylococcus aureus (MRSA), of Bromus inermis inflorescence was studied, using the bioassay guided fractionation as well as the bio-autographic method. MATERIALS AND METHODS:The plant organic extract was prepared via maceration in methanol, followed by the fractionation using n-hexane. The extracts were subjected for minimum inhibitory concentrations (MICs) against some human pathogenic bacteria via standard broth micro-dilution assay. Thereafter, a bio-autographical method was applied using the high performance thin layer chromatography (HPTLC) coupled with agar overlay assays for the primary characterization and identification of bioactive substance (s). RESULTS:Through the bioassay guided fractionation method, the greatest antibacterial activities were related to the n-hexane extract. It was also revealed that the effective anti-MRSA agent of the assessed plant was a relatively polar substance with an MIC value of about 8 μg/mL against the tested MRSA strain (in comparison with the MIC value of 32 μg/mL for chloramphenicol). CONCLUSIONS:As a result of the full range UV-Vis scanning of the responsible band in the HPTLC experiments (200-700 nm), the flavonoid was the most imaginable natural compound.
journal_name
Jundishapur J Microbioljournal_title
Jundishapur journal of microbiologyauthors
Aliahmadi A,Mirzajani F,Ghassempour A,Sonboli Adoi
10.5812/jjm.12739subject
Has Abstractpub_date
2014-12-01 00:00:00pages
e12739issue
12eissn
2008-3645issn
2008-4161journal_volume
7pub_type
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