Discovery and validation of Lmj_04_BRCT domain, a novel therapeutic target: identification of candidate drugs for leishmaniasis
Keywords: 
Leishmania
BRCT
Drug discovery
Therapeutic target
Homology modeling
Virtual screening
Molecular dynamics
Issue Date: 
2021
ISSN: 
1422-0067
Note: 
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/)
Citation: 
Peña-Guerrero, J. (José); Fernández-Rubio, C. (Celia); Burguete-Mikeo, A.; et al. "Discovery and validation of Lmj_04_BRCT domain, a novel therapeutic target: identification of candidate drugs for leishmaniasis". International Journal of Molecular Sciences. 22 (19), 2021, 10493
Abstract
Since many of the currently available antileishmanial treatments exhibit toxicity, low effectiveness, and resistance, search and validation of new therapeutic targets allowing the development of innovative drugs have become a worldwide priority. This work presents a structure-based drug discovery strategy to validate the Lmj_04_BRCT domain as a novel therapeutic target in Leishmania spp. The structure of this domain was explored using homology modeling, virtual screening, and molecular dynamics studies. Candidate compounds were validated in vitro using promastigotes of Leishmania major, L. amazonensis, and L. infantum, as well as primary mouse macrophages infected with L. major. The novel inhibitor CPE2 emerged as the most active of a group of compounds against Leishmania, being able to significantly reduce the viability of promastigotes. CPE2 was also active against the intracellular forms of the parasites and significantly reduced parasite burden in murine macrophages without exhibiting toxicity in host cells. Furthermore, L. major promastigotes treated with CPE2 showed significant lower expression levels of several genes (alpha-tubulin, Cyclin CYCA, and Yip1) related to proliferation and treatment resistance. Our in silico and in vitro studies suggest that the Lmj_04_BRCT domain and its here disclosed inhibitors are new potential therapeutic options against leishmaniasis.


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