The in vitro pharmacological activities of 12 South African Hermannia species

A B Essop, R L van Zyl, S F van Vuuren, D Mulholland, A M Viljoen
Journal of Ethnopharmacology 2008 October 28, 119 (3): 615-9
Hermannia species are widely used in traditional medicine in southern Africa, however no extensive study has been conducted on this genus. The acetone extracts of 12 indigenous Hermannia species (flowers, stems and leaves combined) were evaluated for various pharmacological activities. All investigated species displayed promising antimicrobial activity, with Hermannia saccifera being the most active against Staphylococcus aureus (MIC=19.5 microg/ml), Bacillus cereus (MIC=19.5 microg/ml) and Enterococcus faecalis (MIC=125 microg/ml). Time-kill studies on H. saccifera against S. aureus indicated bacteriostatic activity at 1.25, 2.5 and 5.0%, and a concentration of 7.5% achieved complete bactericidal activity after 4h. Ten of the 12 species indicated good free radical scavenging activity, with H. cuneifolia demonstrating the most promising activity in the 2,2-diphenyl-1-picrylhydrazyl (DPPH():IC(50)=10.26 microg/ml) and 2,2'-azino-bis(3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS(+)/TEAC: IC(50)=10.32 microg/ml) assays. In addition, all species exhibited moderate anti-inflammatory activity in the 5-lipoxygenase assay with the exception of H. cuneifolia (IC(50)=15.32 microg/ml). Overall, the selected species were low in cytotoxicity, except for H. saccifera and H. trifurca. Several Hermannia species indicated promising in vitro biological activity which relate to their traditional use in treating a number of disease states.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Trending Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"