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DOI: 10.1055/s-2003-42791
© Georg Thieme Verlag Stuttgart · New York
Gene Expression Changes in the Human Fibroblast Induced by Centella asiatica Triterpenoids
This research is funded by the Malaysia-MIT Biotechnology Partnership Program (MMBPP), Natural Product Discovery sub program, phase I. C.D.C. acknowledges the support of an N.I.H. Genome Sciences training grant.Publication History
Received: November 26, 2002
Accepted: April 18, 2003
Publication Date:
06 October 2003 (online)
Abstract
The molecular pathways underlying the diverse biological activity of the triterpeniod compounds isolated from the tropical medicinal plant Centella asiatica were studied with gene microarrays and real-time reverse transcription polymerase chain reaction (real-time RT-PCR) to quantify the expression of 1053 human genes in human fibroblasts. Fibroblast cells grown in culture were used as a model system to evaluate the stimulation of wound healing by titrated extract from Centella asiatica (TECA) as well as by the four principal triterpenoid components of Centella. TECA treatment effects the expression of genes involved in angiogenesis and the remodeling of extracellular matrix, as well as diverse growth factor genes. The extent of expression change of TNFAIP6, an extracellular hyaluronan binding protein, was found to be largely dose-dependent, to respond most strongly to the free acids asiatic acid and madecassic acid, and to increase in expression over 48 hours of treatment. These results show that Centella triterpenes evoke a gene-expression response consistent with their prevailing medical uses in the treatment of connective tissue disorders such as wound healing and microangiopathy. The identification of genes modulated by these compounds provides the basis for a molecular understanding of Centella’s bioactivity, and opportunities for the quantitative correlation of this activity with clinical effectiveness at a molecular level.
Abbreviations
TNFAIP6:tumor necrosis factor alpha, induced protein 6
ECM:extracellular matrix
AA: asiatic acid
MA:madecassic acid
AS: asiaticoside
MS:madecassoside
TECA:titrated extract of Centella asiatica
MTT:3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium
GAPDH:glyceraldehyde-3-phosphate dehydrogenase
Key words
Centella asiatica - Apiaceae - asiatic acid - madecassic acid - wound healing - gene expression
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Dr. ChoKyun Rha
Biomaterials Science and Engineering Laboratory, 56-265
Massachusetts Institute of Technology
77 Massachusetts Ave.
Cambridge
MA 02139
USA
Fax: +1-617-253-6358
Email: ckrha@mit.edu