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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
pharmacology, toxicology and pharmaceutics
Effects of antiinflammatory triterpenes isolated from Leptadenia hastata latex on keratinocyte proliferation
Phytotherapy Research, Volume 15, No. 2, Year 2001
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Description
Several triterpenes isolated from Leptadenia hastata latex were tested for their anti-inflammatory activity. Lupeol (1), its acetate (2) and palmitate (3) esters were found to be the main antiinflammatory constituents in the croton oil-induced ear oedema test. Furthermore, lupeol hemisuccinate (4), synthesized from lupeol, exhibited a higher activity than lupeol in the test. These results prove that the triterpenes play a pivotal role in the topical antiinflammatory effect of this latex. In addition, an in vitro model of human skin keratinocytes (epidermal explants) cultured at an air-liquid interface on a de-epidermized human dermis (DED) was used to investigate the effects of lupeol esters on skin repair in vitro. Compared with the control, compounds 2 and 3 improved keratinocyte proliferation at a concentration of 5 μM in the culture medium; however, they remained less active than compounds 1 and 4. In contrast to compound 1, all the lupeol esters (2-4), and particularly compound 4, induced a good differentiation of keratinocytes with a well-formed stratum corneum without parakeratosis. These results substantiate the topical use of Leptadenia hastata latex in traditional medicine and showed that both antiinflammatory activity and the effect on keratinocyte proliferation of compound 1 could be improved by its hemisuccinylation; on the contrary, esterification by acetylation or palmitoylation decreased these activities. Copyright © 2001 John Wiley & Sons, Ltd.
Authors & Co-Authors
Nikiéma, Jean Baptiste
Belgium, Brussels
Université Libre de Bruxelles
Burkina Faso, Ouagadougou
University of Ouagadougou
Vanhaelen-Fastrè, Renée J.
Belgium, Brussels
Université Libre de Bruxelles
Vanhaelen, Maurice H.
Belgium, Brussels
Université Libre de Bruxelles
Fontaine, J.
Belgium, Brussels
Laboratory of Pharmacology
De Graef, C.
Belgium, Brussels
Université Libre de Bruxelles
Heenen, Michel
Belgium, Brussels
Université Libre de Bruxelles
Statistics
Citations: 93
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1002/ptr.700
ISSN:
0951418X
Research Areas
Environmental
Health System And Policy