ArticleInternational journal for parasitology. Drugs and drug resistance2024
Antileishmanial and synergic effects of Rhanterium epapposum essential oil and its main compounds alone and combined with glucantime against Leishmania major infection.
Article in International journal for parasitology. Drugs and drug resistance, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
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Abstract
Cutaneous leishmaniasis (CL) is a widespread disease affecting both humans and animals globally. Currently, common treatments (e.g., glucantime (GC) for CL treatment have many side effects that limit their use. The current experimental study aims to assess the in vitro, in vivo, and potential mechanisms of action of Rhanterium epapposum essential oil (REE) and its main compounds β-Myrcene (MC), camphene (CP), and limonene (LN) alone and in combination against Leishmania major. In vitro effects of REE and its main compounds were evaluated on amastigote forms, infection in macrophages cells stimulation of nitric oxide (NO), and stimulation of the cellular immunity in macrophages. In vivo efficacy of REE and its main constituents was also assessed in mice with CL through evaluating parasite burden, oxidative stress and proinflammatory-related genes. A concentration-dependent reduction in the average number of amastigotes was observed, with statistical significance (p < 0.001); whereas the results revealed synergistic effects when REE, MC and LN were combined with GC. REE and main compounds mainly in combination elicited a dose-dependent elevation in NO production and the expression levels of inducible nitric oxide synthase (iNOS), interferon gamma (IFN-γ), and tumor necrosis factor (TNF-α) genes in macrophages. Notably, mice treated with a combination of REE, MC, and GC showed the complete recovery of CL lesions after 28 days of treatment and resulted in a reduction of tissue malondialdehyde levels and a significant increase (p < 0.001) in the gene expression levels of the antioxidant enzymes. Topical treating CL-infected mice with REE and its main compounds alone particularly in conjunction with GC, significantly increased (p < 0.001) the expression levels of IFN-γ and interleukin (IL-12), while also causing a notable reduction in IL-4 expression. The findings of the current experimental research revealed the high in vitro and in vivo antileishmanial efficacy of REE and its main compounds MC, CP, and LN mainly in combination with GC; which indicated the high synergic effects of these compounds.
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