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Vol. 4 · Issue 2 · 2024 Oct 28, 2024 Short Report

In vitro antifungal activity of extracts and alkaloid compounds from Piper arboreum against dermatophytes

FL
Fabiana Brusco Lorenzetti State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
CM
Carla Maria Mariano Fernandez State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
EH
Eliana Harue Endo State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
RM
Regina Yasuko Makimori State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
MB
Mariza Barion Romagnolo State University of Maringá (UEM), Laboratory of Vegetation Ripária / Nupelia, Plant Systematics/Department of Biology, Maringá, Brazil Brazil
CL
César Armando Contreras Lancheros State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
MP
Marcia Regina Pereira Cabral State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
MS
Maria Helena Sarragiotto State University of Maringá (UEM), Chemistry Department, Maringá, Brazil Brazil
CV
Celso Vataru Nakamura State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
TU
Tânia Ueda Nakamura State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
P
Ludmila Pini Simões State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil Brazil
BD
Benedito Prado Dias Filho Corresponding State University of Maringá (UEM), Postgraduate Program in Pharmaceutical Sciences, Maringá, Brazil bpdfilho@uem.br Brazil
Pages110-117 PublishedOct 28, 2024 LicenseOpen Access
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IJPBP 2 VOL 4 · 2
VOL 4 · NO 2 · 2024 View issue

Abstract

Piper is widely distributed in subtropical regions and species of this genus are known for their potent pharmacological activities. Piper arboreum Aubl. is a traditional medicinal plant popularly known as "pau-de-angola", "jaborandi", and chili pepper, demonstrating antifungal, trypanocidal, antibacterial, and antioxidant activities. The leaves of P. arboreum were extracted using Soxhlet and dichloromethane to obtain the extract, which was then fractionated using solvents of different polarities. Samples were analyzed using ultra-high-performance liquid chromatography coupled with mass spectrometry equipped with an electrospray ionization source. Antifungal microdilution assays were performed, and scanning and transmission electron microscopy were used to assess the invasion of the pretreated nail. The minimum inhibitory concentration (MIC) values of the extract and a dichloromethane fraction were, respectively, 62.5 μg/ml and 16.0 μg/ml against Trichophyton rubrum , and 125 μg/ml and 62.5 μg/ml, and 500 μg/ml and 500 μg/ml against T. mentagrophytes , and Microsporum gypseum , respectively. No growth was observed on nail fragments exposed to the extract (at concentrations > 64 µg/ml and then inoculated with spore suspension. Transmission electron microscopy revealed strong inhibition of hyphal growth and an irregular growth pattern following treatment with the extract and the dichloromethane fraction. Results demonstrated the antifungal properties of the P. arboreum extract and its dichloromethane fraction against dermatophytes, with the identification of three different alkaloid compounds. The cytotoxicity was specific towards the fungal cells, and morphological and ultrastructural analyses indicated damage to the cell wall and cytoplasmic membrane as the potential mechanism of action. The leaf material used to generate the extract can be taken from the plant without any detrimental effect thus enabling strategies to be implemented for the exploitation of this species.

Keywords

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