Investigation of the in vitro time-dependent effects of artesunate and benznidazole on Leishmania tropica
Abstract
Leishmaniasis is a vector-borne parasitic disease caused by protozoa of the genus Leishmania. This study evaluated the in vitro time-dependent effects of artesunate, an artemisinin derivative, and benznidazole, a nitroimidazole compound, on Leishmania tropica promastigotes. We performed antileishmanial activity tests using the L. tropica isolate coded MHOM/TR/2012/CBCL-LT. We thawed the isolate after removing it from the liquid nitrogen tank, cultured it in NNN medium, and then transferred it to RPMI-1640 medium containing fetal bovine serum. Viability was assessed using the colorimetric test of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) at concentration ranges of 2500–19.53 µg/mL for artesunate and 310–2.42 µg/mL for benznidazole. We determined the minimum parasiticidal concentration (MPC) by microscopic evaluation. We used two-way ANOVA and a Tukey multiple comparison test for statistical analysis. IC50 values for artesunate were determined as 280 µg/mL, 85.35 µg/mL, and 71.18 µg/mL at 24, 48, and 72 hours, respectively; and for benznidazole, as 43.75 µg/mL, 24.76 µg/mL, and 23.87 µg/mL. For both drugs, concentration and incubation time significantly affected promastigote viability (p<0.05). The antileishmanial effects of both drugs varied over time. Benznidazole showed antileishmanial effects earlier, while artesunate efficacy increased with longer incubation periods. These findings suggest that both drugs require more comprehensive evaluation.
Keywords
References
- Mann, S., Frasca, K., Scherrer, S., Henao-Martínez, A.F., Newman, S., Ramanan, P., Suarez, J.A. (2021). A review of leishmaniasis: Current knowledge and future directions. Curr Trop Med Rep, 8(2), 121-132. https://doi.org/10.1007/s40475-021-00232-7
- World Health Organization. (2025). Leishmaniasis. Retrieved February 8, 2026, from https://www.who.int/health-topics/leishmaniasis#tab=tab_1
- Özbel, Y., Töz, S., Muñoz, C., Ortuño, M., Jumakanova, Z., Pérez-Cutillas, P., Maia, C., Conceição, C., Baneth, G., Pereira, A., Van der Stede, Y., Gossner, C.M., Berriatua, E. (2022). The current epidemiology of leishmaniasis in Turkey, Azerbaijan and Georgia and implications for disease emergence in European countries. Zoonoses Public Health, 69(5), 395-407. https://doi.org/10.1111/zph.12977
- Şakru, N., Özbel, Y., Töz, S. (2025). Refugees/immigrants and leishmaniasis in the world’s largest hosting country, Türkiye: A systematic review. PLoS Negl Trop Dis, 19(4), e0012947. https://doi.org/10.1371/journal.pntd.0012947
- Majoor, A., Michel, G., Marty, P., Boyer, L., Pomares, C. (2025). Leishmaniases: Strategies in treatment development. Parasite, 32, 18. https://doi.org/10.1051/parasite/2025009
- Newman, D.J., Cragg, G.M. (2020). Natural products as sources of new drugs over the nearly four decades from 01/1981 to 09/2019. J Nat Prod, 83(3), 770-803. https://doi.org/10.1021/acs.jnatprod.9b01285
- Ritz, C., Baty, F., Streibig, J.C., Gerhard, D. (2015). Dose-Response Analysis Using R. PLoS One, 10(12), e0146021. https://doi.org/10.1371/journal.pone.0146021
- Ismail, M., Ling, L., Du, Y., Yao, C., Li, X. (2018). Liposomes of dimeric artesunate phospholipid: A combination of dimerization and self-assembly to combat malaria. Biomaterials, 163, 76-87. https://doi.org/10.1016/j.biomaterials.2018.02.026
Details
Primary Language
English
Subjects
Parasitology
Journal Section
Research Article
Authors
Yener Özel
0000-0001-6618-8251
Türkiye
Gamze Doğan
0000-0001-8447-274X
Türkiye
İbrahim Çavuş
*
0000-0002-3860-0146
Türkiye
Publication Date
August 31, 2026
Submission Date
February 26, 2026
Acceptance Date
June 29, 2026
Published in Issue
Year 2026 Volume: 5 Number: 2