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October 2021

Plast Reconstr Surg. 1998 Mar; 101(3): 756-65.

Enhanced proliferation of fibroblasts and endothelial cells treated with an extract of the leaves of Chromolaena odorata (Eupolin), an herbal remedy for treating wounds.

Phan TT, Hughes MA, Cherry GW.

Wound Healing Institute, Headington, Oxford, United Kingdom.

Burns are a major problem in many developing countries. Eupolin ointment is a topical agent used in the treatment of soft-tissue wounds and burns in Vietnam and is made from an aqueous extract of the leaves of Chromolaena odorata (formerly Eupatorium odoratum). Clinical studies using this extract have shown antimicrobial and anticoagulation effects as well as the promotion of tissue remodeling in the wound healing process. However, the mechanism by which this agent affects cells involved in the wound healing process is unknown. In our research, fibroblasts and endothelial cells, two cell types that play a crucial role in wound healing, were used to investigate some of the effects of Eupolin extract in vitro. Cell growth was estimated by a colorimetric assay at different time intervals. Enhanced growth of fibroblasts and endothelial cells was found at concentrations of 10 microg/ml and 100 microg/ml of Eupolin extract. This was particularly evident in medium supplemented with only 0.5% fetal calf serum where the cells were quiescent. Toxicity of the extract to fibroblasts was observed at 250 microg/ml in Dulbecco's modified Eagle's medium/0.5% fetal calf serum, but there was no significant damage at this dose to the endothelial cells. The results of the study demonstrated that Eupolin extract increased fibroblast and endothelial cell growth, and this could explain in part the beneficial clinical effects that have been observed.

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