Effects of antiinflammatory triterpenes isolated from Leptadenia hastata latex on Keratinocyte Proliferation

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),...

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Bibliographic Details
Published in:Phytotherapy research 2001-03, Vol.15 (2), p.131-134
Main Authors: Nikiéma, J. B., Vanhaelen-Fastré, R., Vanhaelen, M., Fontaine, J., De Graef, C., Heenen, M.
Format: Article
Language:English
Subjects:
Adult
Animals
Anti-Inflammatory Agents - pharmacology
Anti-Inflammatory Agents - therapeutic use
antiinflammatory effect
Asclepiadaceae
Biological and medical sciences
Cell Division - drug effects
Croton Oil
Edema - chemically induced
Edema - prevention & control
Female
General pharmacology
Humans
keratinocyte proliferation
Keratinocytes - drug effects
Latex
Leptadenia hastata
Medical sciences
Mice
Pharmacognosy. Homeopathy. Health food
Pharmacology. Drug treatments
Plant Extracts - pharmacology
Plant Extracts - therapeutic use
Plants, Medicinal
Triterpenes - pharmacology
Triterpenes - therapeutic use
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Summary: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.
ISSN:0951-418X
1099-1573
DOI:10.1002/ptr.700