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Reis IMA, Umehara E, Conceição RS, de M Oliveira L, Dos S Junior MC, Costa-Silva TA, Amaral M, Tempone AG, Branco A, Lago JHG. γ-Lactones from Persea americana and Persea fulva - in Vitro and in Silico Evaluation of Trypanosoma cruzi Activity. Chem Biodivers 2021; 18:e2100362. [PMID: 34254435 DOI: 10.1002/cbdv.202100362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/12/2021] [Indexed: 11/10/2022]
Abstract
In the present study, five known γ-lactones (majoranolide B - 1, majorenolide - 2, majorynolide - 3, lincomolide D - 4, and isolinderanolide E - 5), as well as a new one (perseanolide - 6), were isolated from Persea fulva and P. americana. All isolated compounds exhibited potential activity against trypomastigote forms of Trypanosoma cruzi, whereas compounds 2 (EC50 of 4.8 μM) and 6 (EC50 of 3.6 μM) displayed superior activity than the positive control benznidazole (EC50 of 16.4 μM), with selectivity index (SI) values of 17.8 and >55.6, respectively (benznidazole, SI>12.2). Molecular docking studies were performed for 1-6 against six T. cruzi molecular targets. Using this approach, we observed that, even though perseanolide (6) showed favorable docking to several studied targets, the results were especially promising for hypoxanthine phosphoribosyl transferase (PDB 1TC1). As PDB 1TC1 is associated to the transference of a monophosphorylated ribose from phosphoribosylpyrophosphate (PRPP) in the ribonucleotide synthesis pathway, this interaction may affect the survival of T. cruzi in mammalian cells. The data herein also indicate that possible intermolecular interactions between 6 and PDB 1TC1 derive from (i) hydrogen bonds in the α,β-unsaturated-γ-lactone unity and (ii) hydrophobic interactions in the long-chain alkyl group. Based on our results, perseanolide (6), reported for the first time in this work, can auspiciously contribute to future works regarding new trypanocidal agents.
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Affiliation(s)
- Isabella Mary A Reis
- Departamento de Saúde, Universidade Estadual de Feira de Santana, 44036-900, Feira de Santana, BA, Brazil
| | - Eric Umehara
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580, Santo Andre, SP, Brazil
| | - Rodrigo S Conceição
- Departamento de Saúde, Universidade Estadual de Feira de Santana, 44036-900, Feira de Santana, BA, Brazil
| | - Larissa de M Oliveira
- Departamento de Saúde, Universidade Estadual de Feira de Santana, 44036-900, Feira de Santana, BA, Brazil
| | | | - Thais A Costa-Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580, Santo Andre, SP, Brazil
| | - Maiara Amaral
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, 01246-902, São Paulo, SP, Brazil
| | - Andre G Tempone
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, 01246-902, São Paulo, SP, Brazil
| | - Alexsandro Branco
- Departamento de Saúde, Universidade Estadual de Feira de Santana, 44036-900, Feira de Santana, BA, Brazil
| | - João Henrique G Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580, Santo Andre, SP, Brazil
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2
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Bern C, Messenger LA, Whitman JD, Maguire JH. Chagas Disease in the United States: a Public Health Approach. Clin Microbiol Rev 2019; 33:e00023-19. [PMID: 31776135 PMCID: PMC6927308 DOI: 10.1128/cmr.00023-19] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Trypanosoma cruzi is the etiological agent of Chagas disease, usually transmitted by triatomine vectors. An estimated 20 to 30% of infected individuals develop potentially lethal cardiac or gastrointestinal disease. Sylvatic transmission cycles exist in the southern United States, involving 11 triatomine vector species and infected mammals such as rodents, opossums, and dogs. Nevertheless, imported chronic T. cruzi infections in migrants from Latin America vastly outnumber locally acquired human cases. Benznidazole is now FDA approved, and clinical and public health efforts are under way by researchers and health departments in a number of states. Making progress will require efforts to improve awareness among providers and patients, data on diagnostic test performance and expanded availability of confirmatory testing, and evidence-based strategies to improve access to appropriate management of Chagas disease in the United States.
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Affiliation(s)
- Caryn Bern
- University of California San Francisco School of Medicine, San Francisco, California, USA
| | | | - Jeffrey D Whitman
- University of California San Francisco School of Medicine, San Francisco, California, USA
| | - James H Maguire
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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3
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Caballero E Z, Correa R, Nascimento MS, Villarreal A, Llanes A, Kesper N. High sensitivity and reproducibility of in-house ELISAs using different genotypes of Trypanosoma cruzi. Parasite Immunol 2019; 41:e12627. [PMID: 30908676 DOI: 10.1111/pim.12627] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 02/08/2019] [Accepted: 03/20/2019] [Indexed: 02/01/2023]
Abstract
The adequate choice of Trypanosoma cruzi strains as antigen source for the diagnosis of Chagas disease is still controversial due to differences in terms of accuracy reported between different diagnostic tests. In this study was determined if the genetic variability between different genotypes of T. cruzi (TcI, TcII and TcIV) affect the final diagnosis of Chagas disease. The sensitivity and specificity index of in-house ELISA tests prepared with different T. cruzi strains were evaluated with chagasic and non-chagasic control sera and using the TESA-blot as a reference test. The results of this study revealed that the sensitivity index did not vary, with percentages of 100% for all strains in both tests. However, the specificity index for ELISA tests showed differences between 92% and 98%, but were reduced to 78%-89% when Leishmania-positive sera were included. All ELISAs and TESA-blot prepared with different antigens and the recombinant Wiener test were challenged in an endemic community for Chagas disease in Panama. Both ELISAs and TESA-blot recognized the same positive sera, corroborating the sensitivity indexes (100%) found with the control sera. The TESA-blot maintained the specificity index of 100% and did not display false positives. However, the recombinant Wiener test decreased its sensitivity to 81.25%.
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Affiliation(s)
- Zuleima Caballero E
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Asociación de Interés Público (INDICASAT-AIP), Panamá, República of Panamá.,Sistema Nacional de Investigación - Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panamá, República de Panamá
| | - Ricardo Correa
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Asociación de Interés Público (INDICASAT-AIP), Panamá, República of Panamá.,Sistema Nacional de Investigación - Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panamá, República de Panamá
| | - Marilda S Nascimento
- Instituto de Medicina Tropical da Universidade de São Paulo (IMT-USP), São Paulo, Brasil
| | - Alcibiades Villarreal
- Sistema Nacional de Investigación - Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panamá, República de Panamá
| | - Alejandro Llanes
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Asociación de Interés Público (INDICASAT-AIP), Panamá, República of Panamá
| | - Norival Kesper
- Instituto de Medicina Tropical da Universidade de São Paulo (IMT-USP), São Paulo, Brasil
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Pinto EG, Antoniazzi MM, Jared C, Tempone AG. Antileishmanial and antitrypanosomal activity of the cutaneous secretion of Siphonops annulatus. J Venom Anim Toxins Incl Trop Dis 2014; 20:50. [PMID: 25873939 PMCID: PMC4396788 DOI: 10.1186/1678-9199-20-50] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 10/07/2014] [Indexed: 11/10/2022] Open
Abstract
Background Among the tropical parasitic diseases, those caused by protozoans are considered a challenge to public health, being represented by leishmaniasis and Chagas disease. In view of the low effectiveness and toxicity of the current therapy, animal venoms such as amphibian secretions have been used as a promising source of new drug prototypes. The present work aimed to achieve bioguided fractionation of metabolites present in a cutaneous secretion of the caecilian Siphonops annulatus (Amphibia: Gymnophiona: Siphonopidae) with antileishmanial and antitrypanosomal activity. Methods Through liquid-liquid partition and chromatographic techniques, the secretion was fractionated using bioguided assays. The 50% inhibitory concentration (IC50) of the main fraction (SaFr1) was studied against Leishmania (L.) infantum promastigotes and intracellular amastigotes, trypomastigotes of Trypanosoma cruzi and mammalian cells; viability was detected by the colorimetric MTT assay. By using a spectrofluorimetric assay with the probe SYTOX® Green and transmission electron microscopy (TEM), we also investigated the potential damage caused by SaFr1 in the plasma membrane and mitochondria of Leishmania. Results The bioguided assay enabled isolation of a highly purified fraction (SaFr1) with an IC50 of 0.065 μg/mL against promastigotes and 2.75 μg/mL against trypomastigotes. Due to its high toxicity to peritoneal macrophages, SaFr1 showed no selectivity towards the intracellular forms of Leishmania. Ultrastructural studies with Leishmania demonstrated severe mitochondrial damage and the formation of large cytoplasmic vacuoles, leading to the parasite’s death within a few hours. Nevertheless, it caused no alteration in the plasma membrane permeability as detected by the fluorescent probe and TEM. Conclusions The present study demonstrated for the first time the antiparasitic activity of the skin secretion of the caecilian S. annulatus against Leishmania and T. cruzi, confirming that skin secretions of these amphibians, similarly to those of anurans and salamanders, are also potential tools for the development of new drug candidates against neglected diseases.
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Affiliation(s)
- Erika Gracielle Pinto
- Departamento de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, 8° andar, CEP 01246-000 São Paulo, SP Brasil ; São Paulo Institute of Tropical Medicine, University of São Paulo (USP), São Paulo, São Paulo State Brazil
| | | | - Carlos Jared
- Laboratory of Cell Biology, Butantan Institute, São Paulo, São Paulo State Brazil
| | - Andre Gustavo Tempone
- Departamento de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 351, 8° andar, CEP 01246-000 São Paulo, SP Brasil
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Berrizbeitia M, Figueroa M, Ward BJ, Rodríguez J, Jorquera A, Figuera MA, Romero L, Ndao M. Development and Application of an ELISA Assay Using Excretion/Secretion Proteins from Epimastigote Forms of T. cruzi (ESEA Antigens) for the Diagnosis of Chagas Disease. J Trop Med 2012; 2012:875909. [PMID: 23049572 PMCID: PMC3463186 DOI: 10.1155/2012/875909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Accepted: 08/14/2012] [Indexed: 11/18/2022] Open
Abstract
An indirect enzyme-linked immunoabsorbent assay (ELISA) for Trypanosoma cruzi was developed using epimastigote secretion/excretion proteins (ESEA antigens) obtained from axenic culture supernatants. A panel of 120 serum samples from subjects with confirmed Chagas disease (n = 50), healthy controls (n = 50), and patients with other parasitic diseases (n = 20) was used to evaluate the new ESEA-based ELISA (ELISA(ESEA)). This new test had excellent sensitivity (98%) and acceptable specificity (88%). Cross-reactivity was observed largely in sera from subjects with Leishmania and Ascaris infections. Using Western blotting and epimastigotes from two distinct T. cruzi isolates, several polypeptide bands with molecular masses ranging from 50 to 220 kDa were detected in pooled chagasic sera. However, the band pattern for each isolate was different. These data suggest that an inexpensive and technically simple ELISA based on ESEA antigens is a promising new tool for the diagnosis of Chagas disease.
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Affiliation(s)
- Mariolga Berrizbeitia
- Laboratorio de Diagnóstico Serológico en Enfermedades Infecciosas, Postgrado en Biología Aplicada, Universidad de Oriente, Núcleo de Sucre, Cumana 6101, Venezuela
- Instituto de Biomedicina y Ciencias Aplicadas, Universidad de Oriente, Núcleo de Sucre, Cumana 6101, Venezuela
| | - Milagros Figueroa
- Laboratorio de Diagnóstico Serológico en Enfermedades Infecciosas, Postgrado en Biología Aplicada, Universidad de Oriente, Núcleo de Sucre, Cumana 6101, Venezuela
| | - Brian J. Ward
- National Reference Centre for Parasitology, Research Institute of the McGill University Health Centre, Montreal General Hospital, 1650 Cedar Avenue R3-137, Montreal, QC, Canada H3G 1A4
| | - Jessicca Rodríguez
- Laboratorio de Diagnóstico Serológico en Enfermedades Infecciosas, Postgrado en Biología Aplicada, Universidad de Oriente, Núcleo de Sucre, Cumana 6101, Venezuela
| | - Alicia Jorquera
- Centro de Investigaciones en Ciencias de la Salud, de la Universidad de Oriente, Núcleo de Anzoátegui, Barcelona 6001, Venezuela
| | - Maria A. Figuera
- Departamento de Bioanálsis, Universidad de Oriente, Núcleo de Sucre, Cumana 6101, Venezuela
| | - Leomerys Romero
- Centro de Investigaciones en Ciencias de la Salud, de la Universidad de Oriente, Núcleo de Anzoátegui, Barcelona 6001, Venezuela
| | - Momar Ndao
- National Reference Centre for Parasitology, Research Institute of the McGill University Health Centre, Montreal General Hospital, 1650 Cedar Avenue R3-137, Montreal, QC, Canada H3G 1A4
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Berrizbeitia M, Ndao M, Bubis J, Gottschalk M, Aché A, Lacouture S, Medina M, Ward BJ. Field evaluation of four novel enzyme immunoassays for Chagas' disease in Venezuela blood banks: comparison of assays using fixed-epimastigotes, fixed-trypomastigotes or trypomastigote excreted?secreted antigens from two Trypanosoma cruzi strains. Transfus Med 2006; 16:419-31. [PMID: 17163873 DOI: 10.1111/j.1365-3148.2006.00703.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Many serological tests have been developed for the diagnosis of Chagas' disease, but few have been subjected to a rigorous field evaluation. We have recently described several novel enzyme immunoassays (EIAs) based on fixed-whole organisms or trypomastigote excretory-secretory antigens (TESA) from different Trypanosoma cruzi strains (Tulahuen or Brazil). This study evaluated the most promising of these novel assays (e.g. fixed-epimastigotes, fixed-trypomastigotes, TESA Brazil and TESA Tulahuen antigens) in a field study of Venezuelan blood bank specimens. The assays were tested in an operator-blinded fashion using 2038 blood bank samples obtained from low and high T.cruzi prevalence regions of Venezuela (n= 1050 and n= 988 from Bolivar and Portuguesa states, respectively). Based on National Laboratory for Chagas Immunodiagnosis (NLCI) 'gold standard' results, all novel EIAs were superior to the commercial kit currently used in Venezuela, achieving 100% sensitivity and >99% specificity at optimal cut-off values. The novel assays identified seven false-negative samples compared with the routine screening performed by the Venezuelan blood bank although two samples were also misclassified as positive. Minor differences in the performance of the four novel assays were observed at lower arbitrary cut-off values. This study confirms the potential utility of both the fixed-organism and the TESA-based assays in the diagnosis of T.cruzi infection.
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Affiliation(s)
- M Berrizbeitia
- National Reference Centre for Parasitology, Montreal General Hospital, McGill University, Quebec, Canada
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7
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Berrizbeitia M, Ndao M, Bubis J, Gottschalk M, Aché A, Lacouture S, Medina M, Ward BJ. Purified excreted-secreted antigens from Trypanosoma cruzi trypomastigotes as tools for diagnosis of Chagas' disease. J Clin Microbiol 2006; 44:291-6. [PMID: 16455872 PMCID: PMC1392643 DOI: 10.1128/jcm.44.2.291-296.2006] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
There is currently no "gold standard" test for the diagnosis of late-stage Chagas' disease. As a result, protection of the blood supply in areas where Chagas' disease is endemic remains problematic. A panel of 709 serum samples from subjects with confirmed Chagas' disease (n = 195), healthy controls (n = 400), and patients with other parasitic diseases (n = 114) was used to assess enzyme-linked immunosorbent assays (ELISAs) based on a concentrated extract of excretory-secretory antigens from either Brazil or Tulahuen strain Trypanosoma cruzi trypomastigotes (total trypomastigote excretory-secretory antigens [TESAs]). The total TESA-based assays had excellent overall sensitivity (100%) and specificity (>94%), except for cross-reactivity with Leishmania-infected sera. In an attempt to increase the specificity of the assay, immunoaffinity chromatography was used to purify the TESA proteins (TESA(IA) proteins). By Western blotting, a series of polypeptide bands with molecular masses ranging from 60 to 220 kDa were recognized by pooled sera positive for Chagas' disease. An ELISA based on TESA(IA) proteins had a slightly lower sensitivity (98.6%) but an improved specificity (100%) compared to the sensitivity and specificity of the total TESA protein-based ELISAs. A 60-kDa polypeptide was identified as a major contributor to the cross-reactivity with Leishmania. These data suggest the need for field validation studies of TESA- and TESA(IA)-based assays in regions where Chagas' disease is endemic.
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Affiliation(s)
- Mariolga Berrizbeitia
- McGill Center for Tropical Diseases, Montreal General Hospital, Room D7-153, Montreal, Quebec, H3G IA4 Canada
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Matsumoto TK, Cotrim PC, da Silveira JF, Stolf AMS, Umezawa ES. Trypanosoma cruzi: isolation of an immunodominant peptide of TESA (Trypomastigote Excreted-Secreted Antigens) by gene cloning. Diagn Microbiol Infect Dis 2002; 42:187-92. [PMID: 11929690 DOI: 10.1016/s0732-8893(01)00348-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trypomastigote forms of Trypanosoma cruzi excrete-secrete several molecules, which are immunodominant during the human infection. This complex antigenic mixture termed TESA (Trypomastigote Excreted-Secreted Antigens) presents a 150-160 kDa band that shows excellent specificity and sensitivity in Chagas' disease diagnosis by immunoblotting. Here we describe the isolation and the antigenic characterization of a recombinant peptide (TESA-1) containing a 10 kDa T. cruzi peptide that belongs to the 150-160 kDa TESA fraction. The clone was isolated by screening a T. cruzi genomic expression library with chagasic antibodies reactive to the 150-160 kDa band of TESA immunoblots. After expression, the recombinant peptide TESA-1 was purified and used to immunize rabbits. Anti-TESA-1 immunesera specifically recognized the 150-160 kDa fraction of TESA-blots from eight different T. cruzi strains. The TESA-1 peptide reacted with 82.2% of chagasic patient sera by immunoblotting, showing that it harbors most of the antigenic epitopes that account for the high reactivity of the 150-160 kDa band of TESA.
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Nakazawa M, Rosa DS, Pereira VR, Moura MO, Furtado VC, Souza WV, Barros MN, Abath FG, Gomes YM. Excretory-secretory antigens of Trypanosoma cruzi are potentially useful for serodiagnosis of chronic Chagas' disease. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 2001; 8:1024-7. [PMID: 11527823 PMCID: PMC96191 DOI: 10.1128/cdli.8.5.1024-1027.2001] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The reactivities of sera from chronic chagasic patients against the trypomastigote excreted-secreted antigens (TESA) of Trypanosoma cruzi strains with different biodemes were analyzed by TESA-blot and TESA-enzyme-linked immunosorbent assay (ELISA). Although both tests presented high sensitivity and specificity, TESA-ELISA is more appropriate for screening a larger number of samples.
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Affiliation(s)
- M Nakazawa
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães/FIOCRUZ, Hospital Universitário Oswaldo Cruz/UPE, CEP 50670-420 Recife-PE, Brazil
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