Author | Espada, Caroline Ricce | |
Author | Magalhães, Rubens M | |
Author | Cruz, Mario C | |
Author | Machado, Paulo Roberto | |
Author | Schriefer, Albert | |
Author | Carvalho, Edgar Marcelino de | |
Author | Hornillos, Valentín | |
Author | Alves, João M. | |
Author | Cruz, Angela Kaysel | |
Author | Coelho, Adriano Cappellazzo | |
Author | Uliana, Silvia Reni Bortolin | |
Access date | 2019-09-26T13:29:49Z | |
Available date | 2019-09-26T13:29:49Z | |
Document date | 2019 | |
Citation | ESPADA, Caroline Ricce et al. Investigation of the pathways related to intrinsic miltefosine tolerance in Leishmania (Viannia) braziliensis clinical isolates reveals differences in drug uptake. IJP: Drugs and Drug Resistance, p. 1-9, Fev. 2019. | pt_BR |
ISSN | 2211-3207 | pt_BR |
URI | https://www.arca.fiocruz.br/handle/icict/35917 | |
Sponsorship | Fundação de
Amparo à Pesquisa do Estado de São Paulo (FAPESP, 2011/20484-7
and 2015/09080-2) and Conselho Nacional de Desenvolvimento
Científico e Tecnológico (CNPq, 473343/2012-6), Brazil. This study
was financed in part by the Coordenação de Aperfeiçoamento de
Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001. SRBU is
the recipient of a senior researcher scholarship from CNPq. ACC and
CRE were fellows supported by FAPESP (2012/14629-5 and 2016/
23405-4). | pt_BR |
Language | eng | pt_BR |
Publisher | Elsevier | pt_BR |
Rights | open access | pt_BR |
Subject in Portuguese | Leishmania braziliensis | pt_BR |
Subject in Portuguese | Isolados | pt_BR |
Subject in Portuguese | Miltefosine | pt_BR |
Subject in Portuguese | Suscetibilidade | pt_BR |
Subject in Portuguese | Captação | pt_BR |
Subject in Portuguese | RNAseq | pt_BR |
Title | Investigation of the pathways related to intrinsic miltefosine tolerance in Leishmania (Viannia) braziliensis clinical isolates reveals differences in drug uptake | pt_BR |
Type | Article | pt_BR |
DOI | 10.1016/j.ijpddr.2019.02.005 | |
Abstract | In Brazil, cutaneous leishmaniasis is caused predominantly by L. (V.) braziliensis. The few therapeutic drugs available exhibit several limitations, mainly related to drug toxicity and reduced efficacy in some regions. Miltefosine (MF), the only oral drug available for leishmaniasis treatment, is not widely available and has not yet been approved for human use in Brazil. Our group previously reported the existence of differential susceptibility among L. (V.) braziliensis clinical isolates. In this work, we further characterized three of these isolates of L. (V.) braziliensis chosen because they exhibited the lowest and the highest MF half maximal inhibitory concentrations and were therefore considered less tolerant or more tolerant, respectively. Uptake of MF, and also of phosphocholine, were found to be significantly different in more tolerant parasites compared to the less sensitive isolate, which raised the hypothesis of differences in the MF transport complex Miltefosine Transporter (MT)-Ros3. Although some polymorphisms in those genes were found, they did not correlate with the drug susceptibility phenotype. Drug efflux and compartmentalization were similar in the isolates tested, and amphotericin B susceptibility was retained in MF tolerant parasites, suggesting that increased fitness was also not the basis of observed differences. Transcriptomic analysis revealed that Ros3 mRNA levels were upregulated in the sensitive strain compared to the tolerant ones. Increased mRNA abundance in more tolerant isolates was validated by quantitative PCR. Our results suggest that differential gene expression of the MT transporter complex is the basis of the differential susceptibility in these unselected, naturally occurring parasites. | pt_BR |
Affilliation | Universidade de São Paulo. Instituto de Ciências Biomédicas. Departamento de Parasitologia. São Paulo, SP, Brasil. | pt_BR |
Affilliation | Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos. Ribeirão Preto, SP, Brasil. | pt_BR |
Affilliation | Universidade de São Paulo. Centro de Facilidades para Apoio a Pesquisa. São Paulo, SP, Brasil. | pt_BR |
Affilliation | Universidade Federal da Bahia. Serviço de Imunologia. Salvador, BA, Brasil. | pt_BR |
Affilliation | Universidade Federal da Bahia. Instituto de Ciênicas da Saúde. Salvador, BA, Brasil. | pt_BR |
Affilliation | Universidade Federal da Bahia. Serviço de Imunologia. Salvador, BA, Brasil / Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil. | pt_BR |
Affilliation | Universidad de Sevilla and Centro de Innovación en Química Avanzada.Departamento de Química Orgánica. Sevilla, Spain. | pt_BR |
Affilliation | Universidade de São Paulo. Instituto de Ciências Biomédicas. Departamento de Parasitologia. São Paulo, SP, Brasil. | pt_BR |
Affilliation | Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto. Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos. Ribeirão Preto, SP, Brasil. | pt_BR |
Affilliation | Universidade de São Paulo. Instituto de Ciências Biomédicas. Departamento de Parasitologia. São Paulo, SP, Brasil. | pt_BR |
Affilliation | Universidade de São Paulo. Instituto de Ciências Biomédicas. Departamento de Parasitologia. São Paulo, SP, Brasil. | pt_BR |
Subject | Leishmania braziliensis | pt_BR |
Subject | Isolates | pt_BR |
Subject | Miltefosine | pt_BR |
Subject | Susceptibility | pt_BR |
Subject | Uptake | pt_BR |
Subject | RNAseq | pt_BR |