| Titre |
Antimicrobial activity of compounds from Acanthospermum hispidum DC and Caesalpinia bonduc (L.) ROXB: Beninese plants used by healers against HIV-associated microbial infections |
| Auteurs |
Yehouenou Boniface [4],
|
| Journal: |
Journal of Applied Pharmaceutical Science |
| Catégorie Journal: |
Internationale |
| Impact factor: |
0 |
| Volume Journal: |
5 |
| DOI: |
|
| Resume |
In this study, we have tested alcoholic extracts (60%) from four Beninese plants: Ocimum gratissimum L.,
Acanthospermum hispidum DC, Caesalpinia bonduc (L) Roxb and Calotropis procera W. T. Aiton. They are
used by the healers to prevent opportunistic diseases associated to HIV-AIDS; on six strains such as: Escherichia
coli O 157H7, Staphylococcus aureus ATCC 25923 which resist to methicillin (MRSA), Salmonella typhi,
Klebsiella pneumonia, Candida albicans ATCC 10231, and Mycobacterium bovis BCG 040812 which cause
microbial infections associated with HIV-AIDS. The results show that all the extracts are bacteriostatic and
fungistatic but only the hydro-ethanolic extracts of Acanthospermum hispidum (HE2) and of Caesalpinia bonduc
(HE3) presented antibiotic power (respectively ap = 2 and ap = 4) on Candida albicans ATCC 10231. The
Mycobacterium bovis BCG shown resistance to tested extracts (CMI > 250 μg/mL). The two fungicidal extracts
HE2 and HE3 did not show harmful effects on the cells WI–38 with an IC50 > 100 μg/mL for HE2 and IC50 = 50
μg/mL for HE3. The successive bio-guided purifications of extracts HE2 and HE3 permitted isolation of three
antibacterial compounds: Flavanone (M1); stigmasterol (M2); and quercetin (M3). The three isolated compounds
possess antibiotic power (ap 3±1) on tested strains and are not toxic on shrimp larvae (LC50: 0.30 ± 0.17 mg/mL). |
| Mots clés |
Microbial infections, HIVAIDS,
Beninese plants,
cytotoxic activity,
antimicrobial activity,
chromatographic methods. |
| Pages |
73 - 81 |
| Fichier |
(PDF) |