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Anti-parasitic activity of the Olea europaea and Ficus carica on Leishmania major: new insight into the anti-leishmanial agents

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Abstract

Leishmaniasis is one of the six major tropical diseases that is spreading geographically in the world, with no definitive cure. The aim of the present study was to investigate the anti-leishmanial effects of Olea europaea and Ficus carica extracts against Leishmania major in both in vitro and in vivo experimental models. The in vitro efficiency concentrations of 0.1–2 mg mL− 1 of O. europaea and F. carica extracts were effective against promastigote L. major at 48 h. In addition, the lesion size and parasite burden in BALB/c mice infected with promastigote of L. major were quantified for in vivo evaluation. Results showed that IC50 of O. europaea and F. carica extracts against promastigote were 1.5 and 1.2 mg mL− 1, respectively. In addition, results from in vivo assay revealed that the mean size ± SD of lesions significantly decreased to 3.46 ± 0.96 and 3.65 ± 0.9 mm2 in mice treated with O. europaea and F. carica extracts, respectively, compared with that in the untreated group (p = 0.001). Findings also indicated that O. europaea and F. carica extracts considerably lowered the parasite burden in lesions (p < 0.001), compared with the untreated group. Both extracts showed notable activity against L. major. However, further investigations are required to controlling CL and inhibiting the development of lesions.

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Abbreviations

ANOVA:

Analysis of variance

°C:

Celsius degree

DMSO:

dimethyl sulfoxide

IC50 :

50% inhibitory concentrations

IFN-γ:

interferon-gamma

kg:

kilogram

mg:

milligram

mL:

milliliters

MA:

meglumine antimoniate

SD:

Standard deviation

SSG:

Sodium stibogluconate

TGFβ:

transforming growth factor-β

TNFα:

tumor necrosis factor-alpha

USA:

United States

VL:

visceral leishmaniasis

WHO:

World Health Organization

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Acknowledgements

The authors thank Shahid Sadoughi University of Medical Sciences, Yazd, Iran. And International Centre for Empirical Research and development, Dhaka, Bangladesh.

Funding

This work was supported by a grant (no. 5436) from the Deputy of Research, Birjand University of Medical Sciences, Birjand, Iran. The funders had no role in study design, data collection, analysis and interpretation, the decision to publish, or preparation of the manuscript.

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Correspondence to Reza Saberi or Henrique Douglas Melo Coutinho.

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The authors declare that they have no competing interests.

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The current research was approved by the Ethical Committee of the Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran (IR.BUMS.REC.1399.152).

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Siyadatpanah, A., Mirzaei, F., Hossain, R. et al. Anti-parasitic activity of the Olea europaea and Ficus carica on Leishmania major: new insight into the anti-leishmanial agents. Biologia 77, 1795–1803 (2022). https://doi.org/10.1007/s11756-022-01066-y

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  • DOI: https://doi.org/10.1007/s11756-022-01066-y

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