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Paclitaxel reduces formation of hypertrophic scars in the rabbit ear model

Authors Huang L, Wang G, Jia Z, Chen J, Wang G, Wang X

Received 16 February 2015

Accepted for publication 20 May 2015

Published 27 July 2015 Volume 2015:11 Pages 1089—1095


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Editor who approved publication: Professor Deyun Wang

Li-ping Huang,1* Guo-qi Wang,2* Zi-shan Jia,1 Jing-wen Chen,1 Gang Wang,1 Xing-lin Wang1 
1Department of Physical Therapy, 2Department of Orthopedics, Chinese PLA General Hospital, Beijing, People’s Republic of China
*These authors contributed equally to this work

Background and objective: The onset and progression of pathological scarring involves multiple cytokines and complex mechanisms. However, hyperplasia of fibroblasts and neovascularization plays important roles, which can be inhibited by paclitaxel. The aim of this study was to investigate the efficacy of paclitaxel in the treatment of hypertrophic scars on rabbit ears.
Methods: Rabbit ear models of hypertrophic scars were established to observe the therapeutic effects of paclitaxel at different concentrations (12 mg/L, 24 mg/L, 48 mg/L, 96 mg/L, 18 mg/L, 54 mg/L, 162 mg/L, 486 mg/L, 30 mg/L, 150 mg/L, 750 mg/L, 3,750 mg/L). The outcome measures included hypertrophic index (HI), density of fibroblasts, density of collagenous fibers, and microvessel density.
In comparison with the control group, the concentrations of 96 mg/L, 150 mg/L, and 162 mg/L significantly reduce the formation of hypertrophic scars in the rabbit ear models. However, local necrosis was found in the rabbit ear models treated with paclitaxel solution >400 mg/L.
Conclusion: Paclitaxel has strong inhibitory effects on the hyperplasia of fibroblasts, deposition of collagen, and microangiogenesis in hypertrophic scars on rabbit ears within the concentration range from 48 mg/L to 162 mg/L, without causing local necrosis.

Keywords: hypertrophic scar, paclitaxel, rabbit ear model

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