当前位置： SCI文献检索 > PHARMACEUTICAL BIOLOGY期刊下所有文献 > Antimicrobial bioassay-guided fractionation of a methanol extract of Eupatorium triplinerve.

Antimicrobial bioassay-guided fractionation of a methanol extract of Eupatorium triplinerve.

Abstract：

CONTEXT:Eupatorium triplinerve Vahl (Asteraceae), popularly known as Japana, is widely used in folk medicine, due its analgesic, anticoagulant, antianorexic, antiparasitic, anthelmintic, sedative, antifungal, and antibacterial properties. OBJECTIVE:The present study evaluated the chemical composition and antimicrobial activity of E. triplinerve extracts from different parts of the plant and identified the extract with the highest antimicrobial potential. MATERIALS AND METHODS:Extracts were obtained by maceration of all parts of plant, and subjected to bioassay-guided fractionation of methanol extract by partition column chromatography. The major chemical groups, saponins, reducing sugars, alkaloids, steroids, triterpenoids, phenols, tannins, flavonoids, and others were screened by standard techniques. The antimicrobial activity of the different extracts was performed by microdilution assay and the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values were reported. RESULTS:Phytochemical screening of hydroalcoholic extract from all parts of E. triplinerve identified mainly steroids, coumarins, alkaloids, saponins, tannins, depsides and absence of polysaccharides and flavonoids. The methanol extract of leaves presented the highest content of coumarins and lower MIC values of 62 and 75 µg/mL against Enterococcus faecalis and Staphylococcus aureus, respectively. In addition, its non-polar fractions showed antimicrobial activity with MIC ranging from 16 to 125 µg/mL against Gram-negative bacteria, mainly Escherichia coli. DISCUSSION AND CONCLUSION:Data showed that non-polar fractions of E. triplinerve methanolic extract has better antimicrobial activity and most likely depends on the presence of several compounds, such as depsidones, coumarins, saponins, and triterpenes on crude extract. The results can be exploited largely in research of new antibacterial agents.

journal_name

Pharm Biol

journal_title

Pharmaceutical biology

authors

Matos Lopes TR,de Oliveira FR,Malheiros FF,de Andrade MA,Monteiro MC,Baetas Gonçalves AC

doi

10.3109/13880209.2014.948634

subject

Has Abstract

pub_date

2015-06-01 00:00:00

pages

897-903

issue

eissn

1388-0209

issn

1744-5116

journal_volume

pub_type

杂志文章

在线工具

Antimicrobial bioassay-guided fractionation of a methanol extract of Eupatorium triplinerve.