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Elso OG, Bivona AE, Cenizo R, Malchiodi EL, García Liñares G. Enzymatic synthesis of amlodipine amides and evaluation of their anti- Trypanosoma cruzi activity. Org Biomol Chem 2023; 21:1411-1421. [PMID: 36722938 DOI: 10.1039/d2ob02271k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Advancing with our project about the development of new antiparasitic agents, we have enzymatically synthesized a series of amides derived from amlodipine, a calcium channel blocker used as an antihypertensive drug. Through lipase-catalyzed acylation with different carboxylic acids, nineteen amlodipine derivatives were obtained, eighteen of which were new compounds. To optimize the reaction conditions, the influence of several reaction parameters was analyzed, finding different requisites for aliphatic carboxylic acids and phenylacetic acids. All synthesized compounds were evaluated as antiproliferative agents against Trypanosoma cruzi, the etiological agent of American trypanosomiasis (Chagas' disease). Some of them showed significant activity against the amastigote form of T. cruzi, the clinically relevant form of the parasite. Among synthesized compounds, the derivatives of myristic and linolenic acids showed higher efficacy and lower cytotoxicity. These results added to the advantages shown by the enzymatic methodology, such as mild reaction conditions and low environmental impact, making this approach a valuable way to synthesize these amlodipine derivatives with an application as promising antiparasitic agents.
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Affiliation(s)
- Orlando G Elso
- Laboratorio de Biocatálisis. Departamento de Química Orgánica y UMYMFOR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, Pabellón 2, piso 3, C1428EGA Buenos Aires, Argentina.
| | - Augusto E Bivona
- Instituto de Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires-CONICET, Paraguay 2155, piso 13, Buenos Aires, Argentina.,Instituto de Estudios de la Inmunidad Humoral (IDEHU), Universidad de Buenos Aires-CONICET, Junín 1113, piso 4, Buenos Aires, Argentina
| | - Rocío Cenizo
- Instituto de Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires-CONICET, Paraguay 2155, piso 13, Buenos Aires, Argentina.,Instituto de Estudios de la Inmunidad Humoral (IDEHU), Universidad de Buenos Aires-CONICET, Junín 1113, piso 4, Buenos Aires, Argentina
| | - Emilio L Malchiodi
- Instituto de Microbiología y Parasitología Médica (IMPaM), Universidad de Buenos Aires-CONICET, Paraguay 2155, piso 13, Buenos Aires, Argentina.,Instituto de Estudios de la Inmunidad Humoral (IDEHU), Universidad de Buenos Aires-CONICET, Junín 1113, piso 4, Buenos Aires, Argentina
| | - Guadalupe García Liñares
- Laboratorio de Biocatálisis. Departamento de Química Orgánica y UMYMFOR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, Pabellón 2, piso 3, C1428EGA Buenos Aires, Argentina.
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Schadich E, Nylén S, Gurská S, Kotulová J, Andronati S, Pavlovsky V, Soboleva S, Polishchuk P, Hajdúch M, Džubák P. Activity of 1-aryl-4-(naphthalimidoalkyl) piperazine derivatives against Leishmania major and Leishmania mexicana. Parasitol Int 2022; 91:102647. [PMID: 35985636 DOI: 10.1016/j.parint.2022.102647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 08/09/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
A series of 1-aryl-4-(phthalimidoalkyl) piperazines and 1-aryl-4-(naphthalimidoalkyl) piperazines were retrieved from a proprietary library based on their high structural similarity to haloperidol, an antipsychotic with antiparasitic activity, and assessed as potential antileishmanial scaffolds. Selected compounds were tested for antileishmanial activity against promastigotes of Leishmania major and Leishmania mexicana in dose-response assays. Two of the 1-aryl-4-(naphthalimidoalkyl) piperazines (compounds 10 and 11) were active against promastigotes of both Leishmania species without being toxic to human fibroblasts. Their activity was found to correlate with the length of their alkyl chains. Further analyses showed that compound 11 was also active against intracellular amastigotes of both Leishmania species. In promastigotes of both Leishmania species, compound 11 induced collapse of the mitochondrial electrochemical potential and increased the intracellular Ca2+ concentration. Therefore, it may serve as a promising lead compound for the development of novel antiparasitic drugs.
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Affiliation(s)
- Ermin Schadich
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic
| | - Susanne Nylén
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solna, Sweden
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic
| | - Jana Kotulová
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic
| | - Sergey Andronati
- A.V. Bogatsky Physico-Chemical Institute of National Academy of Sciences of Ukraine, Odessa, Ukraine
| | - Victor Pavlovsky
- A.V. Bogatsky Physico-Chemical Institute of National Academy of Sciences of Ukraine, Odessa, Ukraine
| | | | - Pavel Polishchuk
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry and University Hospital, Palacky University Olomouc, Czech Republic.
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Bahrami S, Oryan A, Bemani E. Efficacy of amiodarone and voriconazole combination therapy in cutaneous leishmaniasis in the mice experimentally infected with Leishmania major. J Infect Chemother 2021; 27:984-990. [PMID: 33637428 DOI: 10.1016/j.jiac.2021.02.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/30/2020] [Accepted: 02/09/2021] [Indexed: 11/15/2022]
Abstract
INTRODUCTION The aim of the present study was to evaluate in vitro and in vivo efficacy of combination therapy of amiodarone and voriconazole against Leishmania major and investigating immune and wound healing responses of cutaneous leishmaniasis to this combination therapy. METHODS For in vitro study, replication of L. major promastigotes and intracellular amastigotes were investigated in the presence and absence of amiodarone and voriconazole. Isobologram construction and calculation of the Fractional Inhibitory Concentration (FIC) were performed. After the appearance of ulcers on the base of tails of BALB/c mice, treatment was initiated by a combination of amiodarone at 40 mg/kg plus voriconazole at 30 mg/kg orally and glucantime at 60 mg/kg intraperitoneally for 28 consecutive days. RESULTS According to the concave isobologram and fractional inhibitory concentration <1, combination of amiodarone plus voriconazole had synergistic effects against L. major promastigotes and intracellular amastigotes. There were less inflammatory cells, more fibroblasts and more collagen deposition in tissue sections in the mice treated with combined drugs compared to the vehicle and untreated mice. Increased glutathione peroxidase activity and decreased malondialdehyde, Interleukin-6, and Tumor necrosis factor-α levels were detected in the combination therapy group in comparison to the vehicle and untreated groups. CONCLUSIONS It seems a combination of amiodarone plus voriconazole can be a rational and promising therapeutic approach in the treatment of cutaneous leishmaniasis.
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Affiliation(s)
- S Bahrami
- Department of Parasitology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | - A Oryan
- Department of Pathology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - E Bemani
- Department of Pathology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Mesquita JT, Romanelli MM, de Melo Trinconi Trinconi Cm C, Guerra JM, Taniwaki NN, Uliana SRB, Reimão JQ, Tempone AG. Repurposing topical triclosan for cutaneous leishmaniasis: Preclinical efficacy in a murine Leishmania (L.) amazonensis model. Drug Dev Res 2020; 83:285-295. [PMID: 32767443 DOI: 10.1002/ddr.21725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/19/2020] [Accepted: 07/07/2020] [Indexed: 01/07/2023]
Abstract
Leishmaniasis remains an important neglected tropical infection caused by the protozoan Leishmania and affects 12 million people in 98 countries. The treatment is limited with severe adverse effects. In the search for new therapies, the drug repositioning and combination therapy have been successfully applied to neglected diseases. The aim of the present study was to evaluate the in vitro and in vivo anti-Leishmania (Leishmania) amazonensis potential of triclosan, an approved topical antimicrobial agent used for surgical procedures. in vitro phenotypic studies of drug-treated parasites were performed to evaluate the lethal action of triclosan, accompanied by an isobolographic ex-vivo analysis with the association of triclosan and miltefosine. The results showed that triclosan has activity against L. (L.) amazonensis intracellular amastigotes, with a 50% inhibitory concentration of 16 μM. By using fluorescent probes and transmission electron microscopy, a pore-forming activity of triclosan toward the parasite plasma membrane was demonstrated, leading to depolarization of the mitochondrial membrane potential and reduction of the reactive oxygen species levels in the extracellular promastigotes. The in vitro interaction between triclosan and miltefosine in the combination therapy assay was classified as additive against intracellular amastigotes. Leishmania-infected mice were treated with topical triclosan (1% base cream for 14 consecutive days), and showed 89% reduction in the parasite burden. The obtained results contribute to the investigation of new alternatives for the treatment of cutaneous leishmaniasis and suggest that the coadministration of triclosan and miltefosine should be investigated in animal models.
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Affiliation(s)
| | | | | | | | | | - Silvia Reni Bortolin Uliana
- Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Juliana Quero Reimão
- Departamento de Morfologia e Patologia Básica, Faculdade de Medicina de Jundiaí, Jundiaí, Brazil
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Hu XL, Feng JH, Pham TA, Ma HY, Ma MX, Song R, Shen W, Xiong F, Zhang XQ, Ye WC, Wang H. Identification of amentoflavone as a potent highly selective PARP-1 inhibitor and its potentiation on carboplatin in human non-small cell lung cancer. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2018; 50:88-98. [PMID: 30466996 DOI: 10.1016/j.phymed.2018.09.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 06/22/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Nuclear protein poly (ADP-ribose) polymerase-1 (PARP-1) is a key enzyme in the repair of DNA and is a promising target in the development of chemosensitizers. This study first investigated the inhibitory effects of amentoflavone (AMF) and its derivatives on PARP-1 and the potentiation of AMF on carboplatin (CBP) in non-small cell lung cancer (NSCLC). PURPOSE This study aims to evaluate the inhibitory effect of AMF against PARP-1 and its potentiation on CBP in lung cancer both in vitro and in vivo. STUDY DESIGN The inhibitory effect of AMF on PARP-1 was investigated using molecular docking and cell-free model of PARP-1 assay. Its potentiation on CBP in lung cancer was also evaluated. METHODS Fluorescence resonance energy transfer assay was used to detect the inhibitory effects of AMF and its analogues on PARP-1. Molecular docking was employed to predict the binding mode of AMF and PARP-1. MTT assay, isobologram analysis, Hoechst staining, and Annexin V-PI double staining were used to confirm the potentiation of AMF on CBP in vitro. siRNA (PARP-1)-A549 cells were used to reveal the action target of AMF. Western blot analysis, immunohistochemistry, and Tunnel assay were employed to evaluate the potentiation of AMF on CBP in A549 xenograft mice. RESULTS AMF and its analogues exerted excellent inhibitory effects on PARP-1 with IC50 values ranging from 0.198 μM to 0.409 μM. Docking experiment showed that AMF can stably bind to PARP-1 with a comparable binding energy to olaparib. AMF can decrease the expression of PAR induced by H2O2in vitro. AMF synergistically increased the CBP anti-proliferative effect in A549. However, its potentiation nearly disappeared when the cells were transfected with siRNAs against PARP-1. Oral administration of AMF (100 mg/kg), combined with CBP, remarkably inhibited A549 tumor growth and ki67 expression, and increased apoptosis compared with CBP-alone group. CONCLUSION All results suggest that AMF can be a potential PARP-1 inhibitor and a candidate adjuvant agent to boost the anticancer effect of CBP in NSCLC.
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Affiliation(s)
- Xiao-Long Hu
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Jia-Hao Feng
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Thi-Anh Pham
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Hai-Yan Ma
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Ming-Xi Ma
- State Key Laboratory of Bioelectronics, Jiangsu Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, People's Republic of China
| | - Rui Song
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Wei Shen
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Fei Xiong
- State Key Laboratory of Bioelectronics, Jiangsu Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, People's Republic of China
| | - Xiao-Qi Zhang
- Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Hao Wang
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
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Pollo LAE, de Moraes MH, Cisilotto J, Creczynski-Pasa TB, Biavatti MW, Steindel M, Sandjo LP. Synthesis and in vitro evaluation of Ca 2+ channel blockers 1,4-dihydropyridines analogues against Trypanosoma cruzi and Leishmania amazonensis: SAR analysis. Parasitol Int 2017; 66:789-797. [PMID: 28801098 DOI: 10.1016/j.parint.2017.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 08/07/2017] [Accepted: 08/08/2017] [Indexed: 11/26/2022]
Abstract
Drugs containing the1,4-dihydropyridine (DHP) core have recently attracted attention concerning their antiparasitic effect against various species of Leishmania and Trypanosoma. This approach named drugs repositioning led to interesting results, which have prompted us to prepare 21 DHP's analogues. The 1,4-DHP scaffold was decorated with different function groups at tree points including the nitrogen atom (NH and N-phenyl), the aryl group attached to C-4 (various substituted aryl residues) and the carbon atoms 2 and 6 (bearing Ph or Me groups). Moreover, the products were evaluated for their cytotoxicity on three cancer and a non-tumoral cell lines. Only 6 of them were antiproliferative and their weak effect (CC50 comprised between 27 and 98μM) suggested these DHPs as good candidates against the intracellular amastigote forms of L. amazonensis and T. cruzi. L. amazonensis was sensitive to DHPs 5, 11 and 15 (IC50 values at 15.11, 45.70 and 53.13μM, respectively) while 12 of them displayed significant to moderate trypanocidal activities against T. cruzi. The best trypanocidal activities were obtained with compounds 2, 18 and 21 showing IC50 values at 4.95, 5.44, and 6.64μM, respectively. A part of the N-phenylated DHPs showed a better selectivity than their NH analogues towards THP-1 cells. 4-Chlorophenyl, 4-nitrophenyl and 3-nitrophenyl residues attached to the carbon atom 4 turned to be important sub-structures for the antitrypanosomal activity.
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Affiliation(s)
- Luiz A E Pollo
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Milene H de Moraes
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Júlia Cisilotto
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Tânia B Creczynski-Pasa
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Maique W Biavatti
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Mario Steindel
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
| | - Louis P Sandjo
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
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Geiger A, Bossard G, Sereno D, Pissarra J, Lemesre JL, Vincendeau P, Holzmuller P. Escaping Deleterious Immune Response in Their Hosts: Lessons from Trypanosomatids. Front Immunol 2016; 7:212. [PMID: 27303406 PMCID: PMC4885876 DOI: 10.3389/fimmu.2016.00212] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 05/17/2016] [Indexed: 12/21/2022] Open
Abstract
The Trypanosomatidae family includes the genera Trypanosoma and Leishmania, protozoan parasites displaying complex digenetic life cycles requiring a vertebrate host and an insect vector. Trypanosoma brucei gambiense, Trypanosoma cruzi, and Leishmania spp. are important human pathogens causing human African trypanosomiasis (HAT or sleeping sickness), Chagas' disease, and various clinical forms of Leishmaniasis, respectively. They are transmitted to humans by tsetse flies, triatomine bugs, or sandflies, and affect millions of people worldwide. In humans, extracellular African trypanosomes (T. brucei) evade the hosts' immune defenses, allowing their transmission to the next host, via the tsetse vector. By contrast, T. cruzi and Leishmania sp. have developed a complex intracellular lifestyle, also preventing several mechanisms to circumvent the host's immune response. This review seeks to set out the immune evasion strategies developed by the different trypanosomatids resulting from parasite-host interactions and will focus on: clinical and epidemiological importance of diseases; life cycles: parasites-hosts-vectors; innate immunity: key steps for trypanosomatids in invading hosts; deregulation of antigen-presenting cells; disruption of efficient specific immunity; and the immune responses used for parasite proliferation.
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Affiliation(s)
- Anne Geiger
- UMR INTERTRYP, IRD-CIRAD, CIRAD TA A-17/G, Montpellier, France
| | | | - Denis Sereno
- UMR INTERTRYP, IRD-CIRAD, CIRAD TA A-17/G, Montpellier, France
| | - Joana Pissarra
- UMR INTERTRYP, IRD-CIRAD, CIRAD TA A-17/G, Montpellier, France
| | | | - Philippe Vincendeau
- UMR 177, IRD-CIRAD Université de Bordeaux Laboratoire de Parasitologie, Bordeaux, France
| | - Philippe Holzmuller
- UMRCMAEE CIRAD-INRA TA-A15/G “Contrôle des maladies animales exotiques et émergentes”, Montpellier, France
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Investigation of Calcium Channel Blockers as Antiprotozoal Agents and Their Interference in the Metabolism of Leishmania (L.) infantum. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:1523691. [PMID: 26941821 PMCID: PMC4749844 DOI: 10.1155/2016/1523691] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/24/2015] [Indexed: 01/20/2023]
Abstract
Leishmaniasis and Chagas disease are neglected parasitic diseases endemic in developing countries; efforts to find new therapies remain a priority. Calcium channel blockers (CCBs) are drugs in clinical use for hypertension and other heart pathologies. Based on previous reports about the antileishmanial activity of dihydropyridine-CCBs, this work aimed to investigate whether the in vitro anti-Leishmania infantum and anti-Trypanosoma cruzi activities of this therapeutic class would be shared by other non-dihydropyridine-CCBs. Except for amrinone, our results demonstrated antiprotozoal activity for fendiline, mibefradil, and lidoflazine, with IC50 values in a range between 2 and 16 μM and Selectivity Index between 4 and 10. Fendiline demonstrated depolarization of mitochondrial membrane potential, with increased reactive oxygen species production in amlodipine and fendiline treated Leishmania, but without plasma membrane disruption. Finally, in vitro combinations of amphotericin B, miltefosine, and pentamidine against L. infantum showed in isobolograms an additive interaction when these drugs were combined with fendiline, resulting in overall mean sum of fractional inhibitory concentrations between 0.99 and 1.10. These data demonstrated that non-dihydropyridine-CCBs present antiprotozoal activity and could be useful candidates for future in vivo efficacy studies against Leishmaniasis and Chagas' disease.
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Gontijo VS, Espuri PF, Alves RB, de Camargos LF, Santos FVD, de Souza Judice WA, Marques MJ, Freitas RP. Leishmanicidal, antiproteolytic, and mutagenic evaluation of alkyltriazoles and alkylphosphocholines. Eur J Med Chem 2015; 101:24-33. [DOI: 10.1016/j.ejmech.2015.06.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/22/2015] [Accepted: 06/02/2015] [Indexed: 01/12/2023]
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Mesquita JT, Tempone AG, Reimão JQ. Combination therapy with nitazoxanide and amphotericin B, Glucantime®, miltefosine and sitamaquine against Leishmania (Leishmania) infantum intracellular amastigotes. Acta Trop 2014; 130:112-6. [PMID: 24239532 DOI: 10.1016/j.actatropica.2013.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 10/15/2013] [Accepted: 11/05/2013] [Indexed: 01/05/2023]
Abstract
Leishmaniasis is a neglected disease that affects poorest population mainly in developing countries, representing one of the major causes of mortality and morbidity. Therefore, efforts to find new chemotherapeutics for leishmaniasis remain a priority. Previous reports demonstrated the in vitro and in vivo antileishmanial activity of nitazoxanide, an antiprotozoan agent used in the treatment of infectious diarrhea. The present work was carried out to determine the effect of nitazoxanide in combination with current antileishmanial drugs. Mouse peritoneal macrophages were infected with Leishmania (Leishmania) infantum amastigotes in order to calculate the 50% and 90% inhibitory concentration values. Drug interactions were assessed with fixed ratio isobologram method and fractional inhibitory concentrations (FIC50 and FIC90); sum of FIC (ΣFIC50 and ΣFIC90) and overall mean ΣFIC (xΣFIC50 and xΣFIC90) were calculated for each combination. The nature of interactions was classified according to the xΣFIC50 and xΣFIC90. The combination between nitazoxanide and amphotericin B, Glucantime(®), miltefosine and sitamaquine showed xΣFIC50 values of 1.13, 0.83, 1.06 and 0.94, respectively, indicating additive interaction. Considering the in vitro activity of nitazoxanide and the obtained results, further in vivo studies may be considered to evaluate possible drug interactions in visceral leishmaniasis.
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