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Susceptibility of Leishmania amazonensis Axenic Amastigotes to the Calpain Inhibitor MDL28170

Authors :
Simone S. C. Oliveira
Fernanda A. Marinho
Leandro S. Sangenito
Sergio H. Seabra
Rubem F. Menna-Barreto
Claudia M. d’Avila
André L. S. Santos
Marta H. Branquinha
Source :
Tropical Medicine and Infectious Disease, Vol 9, Iss 11, p 259 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Leishmaniasis encompasses a group of neglected diseases caused by flagellated protozoa belonging to the Leishmania genus, associated with high morbidity and mortality. The search for compounds with anti-Leishmania activity that exhibit lower toxicity and can overcome the emergence of resistant strains remains a significant goal. In this context, the calpain inhibitor MDL28170 has previously demonstrated deleterious effects against promastigote forms of Leishmania amazonensis, which led us to investigate its role on axenic amastigote forms. The calpain inhibitor MDL28170 was able to decrease the viability of amastigotes in a typically dose-dependent manner. The treatment with the IC50 dose (13.5 μM) for 72 h led to significant amastigote lysis and increased cell-to-cell aggregation. Ultrastructural analysis revealed several cellular alterations, including disruption of the trans-Golgi network and the formation of autophagosomes when treated with MDL28170 at ½ × IC50 dose. Additionally, mitochondrial swelling and the formation of concentric membranous structures inside the mitochondrion were observed after incubation with the IC50 dose. These results reinforce the potential application of the calpain inhibitor MDL28170 against L. amazonensis, highlighting its effectiveness and possible mechanism of action against the parasite.

Details

Language :
English
ISSN :
24146366
Volume :
9
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Tropical Medicine and Infectious Disease
Publication Type :
Academic Journal
Accession number :
edsdoj.61d796d4a2c4699a90129990aee7f48
Document Type :
article
Full Text :
https://doi.org/10.3390/tropicalmed9110259