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Published in: BMC Complementary Medicine and Therapies 1/2015

Open Access 01-12-2015 | Research article

Antifungal activity of berberine hydrochloride and palmatine hydrochloride against Microsporum canis -induced dermatitis in rabbits and underlying mechanism

Authors: Chen-Wen Xiao, Quan-An Ji, Qiang Wei, Yan Liu, Guo-Lian Bao

Published in: BMC Complementary Medicine and Therapies | Issue 1/2015

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Abstract

Background

Phellodendron amurense, exhibits antifungal activity mainly by bioactive components including berberine hydrochloride and palmatine hydrochloride. This study was conducted to evaluate the antifungal effects of berberine hydrochloride, palmatine hydrochloride, and a mixture of both substances against Microsporum canis in vivo and in vitro.

Methods

The minimal inhibitory concentrations (MICs) of monomers and clotrimazole were determined using 1.5 % tryptic soy agar. The effects of these drugs on Microsporum canis growth was detected by determining dry weight. Transmission electron microscopy (TEM) was performed to observe the effect of chemicals on cell ultrastructure. Differential mRNA expressions of eight genes of M. canis treated with berberine or palmatine or their combination at different time points were determined by real-time PCR. NADH enzyme concentration was also detected. Clinical evaluation via in-vivo antifungal assay was also performed. Skin histology PAS staining was also carried out.

Results

Results showed that MICs of berberine, palmatine and clotrimazole were 1, 1, and 0.015 mg/mL, respectively. No significant difference was observed among the growth curves of the three groups before 18 h was reached. TEM showed that these drugs could destroy the cell membrane and organelles of M. canis at different time points. After 30 h of incubation, relative mRNA expressions of the genes in the combined group were significantly higher than those in the other groups including the clotrimazole group (P < 0.05); Palmatine initially induced the mRNA up-regulation of PGAL4, FSH1, PQ-LRP, NADH1 and NDR in M. canis; by contrast, berberine maintained a high expression level of these genes to shorten fungal life cycle and eradicate M. canis. Clinical results showed that combined treatment was more effective than single administration of each monomer or clotrimazole. Hence, berberine mixed with palmatine significantly elicited antifungal activities and could be used to treat M. canis in rabbits.

Conclusion

These results provide a comprehensive view of the mechanism of berberine and palmatine in anti-M. canis activity.
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Metadata
Title
Antifungal activity of berberine hydrochloride and palmatine hydrochloride against Microsporum canis -induced dermatitis in rabbits and underlying mechanism
Authors
Chen-Wen Xiao
Quan-An Ji
Qiang Wei
Yan Liu
Guo-Lian Bao
Publication date
01-12-2015
Publisher
BioMed Central
Published in
BMC Complementary Medicine and Therapies / Issue 1/2015
Electronic ISSN: 2662-7671
DOI
https://doi.org/10.1186/s12906-015-0680-x

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