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Guedes-da-Silva FH, Batista DDGJ, Da Silva CF, Pavão BP, Batista MM, Moreira OC, Souza LRQ, Britto C, Rachakonda G, Villalta F, Lepesheva GI, Soeiro MDNC. Successful Aspects of the Coadministration of Sterol 14α-Demethylase Inhibitor VFV and Benznidazole in Experimental Mouse Models of Chagas Disease Caused by the Drug-Resistant Strain of Trypanosoma cruzi. ACS Infect Dis 2019; 5:365-371. [PMID: 30625275 DOI: 10.1021/acsinfecdis.8b00253] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Up to now, no vaccines are available for Chagas disease, and the current therapy is largely unsatisfactory. Novel imidazole-based scaffolds of protozoan sterol 14α-demethylase (CYP51) inhibitors have demonstrated potent antiparasitic activity with no acute toxicity. Presently our aim was to investigate the effectiveness of the experimental 14α-demethylase inhibitor VFV in the mouse models of Trypanosoma cruzi infection using a naturally drug-resistant Colombiana strain, under monotherapy and in association with the reference drug, benznidazole (Bz). The treatment with VFV resulted in complete parasitemia suppression and 100% animal survival when administered orally (given in 10% DMSO plus 5% Arabic gum) at 25 mg/kg (bid) for 60 days. However, as parasite relapse was found using VFV alone under this treatment scheme, the coadministration of VFV with Bz was assayed giving simultaneously (for 60 days, bid) by oral route, under two different drug vehicles (10% DMSO plus 5% Gum Arabic with or without 3% Tween 80). All tested mice groups resulted in >99.9% of parasitemia decrease and 100% animal survival. qPCR analysis performed on cyclophosphamide immunosuppressed mice revealed that, although presenting lack of cure, VFV given as monotherapy was 14-fold more active than Bz, and the coadministration of Bz plus VFV (given simultaneously, using 10% DMSO plus 5% Gum Arabic as vehicle) resulted in 106-fold lower blood parasitism as compared to the monotherapy of Bz. Another interesting finding was the parasitological cure in 70% of the animals treated with Bz and VFV when the coadministration was given using the VFV suspension in 10% DMSO + Arabic gum + Tween 80 (a formulation that we have found to provide a better pharmacokinetics), even after immunosuppression using cyclophosphamide cycles, supporting the promising aspect of the drug coadministration in improving the efficacy of therapeutic arsenal against T. cruzi.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Girish Rachakonda
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, 1005 Dr. DB Todd Jr. Blvd., Nashville, Tennessee 37208, United States,
| | - Fernando Villalta
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, 1005 Dr. DB Todd Jr. Blvd., Nashville, Tennessee 37208, United States,
| | - Galina I. Lepesheva
- Department of Biochemistry School of Medicine, Institute for Global Health, Vanderbilt University, 622A RRB, 2200 Pierce Avenue, Nashville, Tennessee 37232, United States
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Ferraz da Costa DC, Campos NPC, Santos RA, Guedes-da-Silva FH, Martins-Dinis MMDC, Zanphorlin L, Ramos C, Rangel LP, Silva JL. Resveratrol prevents p53 aggregation in vitro and in breast cancer cells. Oncotarget 2018; 9:29112-29122. [PMID: 30018739 PMCID: PMC6044377 DOI: 10.18632/oncotarget.25631] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 06/04/2018] [Indexed: 12/30/2022] Open
Abstract
One potential target for cancer therapeutics is the tumor suppressor p53, which is mutated in more than 50% of malignant tumors. Loss of function (LoF), dominant negative (DN) and gain of function (GoF) mutations in p53 are associated with amyloid aggregation. We tested the potential of resveratrol, a naturally occurring polyphenol, to interact and prevent the aggregation of wild-type and mutant p53 in vitro using fluorescence spectroscopy techniques and in human breast cancer cells (MDA-MB-231, HCC-70 and MCF-7) using immunofluorescence co-localization assays. Based on our data, an interaction occurs between resveratrol and the wild-type p53 core domain (p53C). In addition, resveratrol and its derivatives pterostilbene and piceatannol inhibit mutant p53C aggregation in vitro. Additionally, resveratrol reduces mutant p53 protein aggregation in MDA-MB-231 and HCC-70 cells but not in the wild-type p53 cell line MCF-7. To verify the effects of resveratrol on tumorigenicity, cell proliferation and cell migration assays were performed using MDA-MB-231 cells. Resveratrol significantly reduced the proliferative and migratory capabilities of these cells. Our study provides evidence that resveratrol directly modulates p53, enhancing our understanding of the mechanisms involved in p53 aggregation and its potential as a therapeutic strategy for cancer treatment.
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Affiliation(s)
- Danielly C Ferraz da Costa
- Departamento de Nutrição Básica e Experimental, Instituto de Nutrição, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 20550-013, RJ, Brazil.,Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
| | - Nathali P C Campos
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.,Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
| | - Ronimara A Santos
- Departamento de Nutrição Básica e Experimental, Instituto de Nutrição, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 20550-013, RJ, Brazil
| | - Francisca Hildemagna Guedes-da-Silva
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.,Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
| | - Mafalda Maria D C Martins-Dinis
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.,Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
| | - Letícia Zanphorlin
- Instituto de Química, Universidade de Campinas, Campinas 13083-970, SP, Brazil
| | - Carlos Ramos
- Instituto de Química, Universidade de Campinas, Campinas 13083-970, SP, Brazil
| | - Luciana P Rangel
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.,Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
| | - Jerson L Silva
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.,Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil
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Guedes-da-Silva FH, Shrestha D, Salles BC, Figueiredo VP, Lopes LR, Dias L, Barcelos LDS, Moura S, de Andrade SP, Talvani A. Trypanosoma cruzi antigens induce inflammatory angiogenesis in a mouse subcutaneous sponge model. Microvasc Res 2014; 97:130-6. [PMID: 25446369 DOI: 10.1016/j.mvr.2014.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 01/13/2023]
Abstract
Acute inflammation and angiogenesis are persistent features of several pathological conditions induced by biological agents leading to the resolution of local and systemic events. Glycoproteins derived from the protozoan Trypanosoma cruzi are suggested to mediate angiogenesis induced by inflammatory cells with still undescribed mechanisms. In this study, we investigated the effects of total antigen from trypomastigote forms of T. cruzi (Y strain), inoculated in sponges 24h after implantation in mice, on angiogenesis, inflammatory cell pattern and endogenous production of inflammatory and angiogenic mediators on days 1, 4, 7 and 14 post-implant. There was an increase in hemoglobin content and in the number of blood vessels associated with T. cruzi antigen stimuli on the 14th day, assessed by the hemoglobin of the implants and by morphometric analysis. However, these antigens were not able to increase type I collagen content on the 14th day. Parasite antigens also induced high production of vascular endothelial growth factor (VEGF) and inflammatory mediators TNF-alpha, CCL2 and CCL5 on the 7th day in sponges when compared to the unstimulated group. Neutrophils and macrophages were determined by measuring myeloperoxidase (MPO) and N-acetyl-β-d-glucosaminidase (NAG) enzyme activities, respectively. Only NAG was increased after stimulation with antigens, starting from day 4 and peaking at day 7. Together, these data showed that antigens from the Y strain of T. cruzi are able to promote inflammatory neovascularization probably induced by macrophage-induced angiogenic mediators in T. cruzi antigen-stimulated sponges in Swiss mice.
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Affiliation(s)
| | - Deena Shrestha
- Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Beatriz Cristina Salles
- Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Vivian Paulino Figueiredo
- Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Laís Roquete Lopes
- Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Luiza Dias
- Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | | | - Sandra Moura
- Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Silvia Passos de Andrade
- Departamento de Fisiologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Andre Talvani
- Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Programa de Pós-Graduação em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Programa de Pós-Graduação em Saúde e Nutrição, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil.
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