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Valderrama V, Sánchez P, Delso M, Díaz-Dosque M, Escobar A, Budini M, Catalán M, Vivar R, López-Muñoz R, Jara JA, Molina-Berríos A. Gallic acid triphenylphosphonium derivatives TPP+-C10 and TPP+-C12 inhibit mitochondrial function in Candida albicans exerting antifungal and antibiofilm effects. J Appl Microbiol 2024; 135:lxad316. [PMID: 38148145 DOI: 10.1093/jambio/lxad316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 11/20/2023] [Accepted: 12/25/2023] [Indexed: 12/28/2023]
Abstract
AIMS To evaluate the antifungal and antibiofilm activity of gallic acid derivatives TPP+-C10 and TPP+-C12 and their effects on mitochondrial function on two Candida albicans reference strains (ATCC 90029 and ATCC 10231). METHODS AND RESULTS First, we determined minimal inhibitory concentration (MIC) using a microdilution assay. Both compounds exerted antifungal effects, and their MICs ranged from 3.9 to 13 µM, with no statistically significant differences between them (P > 0.05, t-test). These concentrations served as references for following assays. Subsequently, we measured oxygen consumption with a Clark electrode. Our observations revealed that both drugs inhibited oxygen consumption in both strains with TPP+-C12 exerting a more pronounced inhibitory effect. We then employed flow cytometry with TMRE as a probe to assess mitochondrial membrane potential. For each strain assayed, the compounds induced a decay in transmembrane potential by 75%-90% compared to the control condition (P < 0.05, ANOVA). Then, we measured ATP levels using a commercial kit. TPP+-C12 showed a 50% decrease of ATP content (P < 0.05 ANOVA), while TPP+-C10 exhibited a less pronounced effect. Finally, we assessed the antibiofilm effect using the MTT reduction assay. Both compounds were effective, but TPP+-C12 displayed a greater potency, requiring a lower concentration to inhibit 50% of biofilms viability (P < 0.05, t-test). CONCLUSIONS Derivatives of gallic acid linked to a TPP+ group exert antifungal and antibiofilm activity through impairment of mitochondrial function in C. albicans.
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Affiliation(s)
- Victoria Valderrama
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Paula Sánchez
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Macarena Delso
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Mario Díaz-Dosque
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Alejandro Escobar
- Laboratory of Cellular Biology, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Mauricio Budini
- Cellular and Molecular Pathology Laboratory, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Mabel Catalán
- Clinical and Molecular Pharmacology Program, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, University of Chile, Santiago, 8380453, Chile
| | - Raúl Vivar
- Clinical and Molecular Pharmacology Program, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, University of Chile, Santiago, 8380453, Chile
| | - Rodrigo López-Muñoz
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, 5110566, Chile
| | - José A Jara
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
| | - Alfredo Molina-Berríos
- Laboratory of Applied Pharmacology for the Development of Anticancer and Antifungal Drugs, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, 8380544, Chile
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Olmedo I, Martínez D, Carrasco-Rojas J, Jara JA. Mitochondria in oral cancer stem cells: Unraveling the potential drug targets for new and old drugs. Life Sci 2023; 331:122065. [PMID: 37659591 DOI: 10.1016/j.lfs.2023.122065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/21/2023] [Accepted: 08/30/2023] [Indexed: 09/04/2023]
Abstract
Head and neck cancer is a major health problem worldwide, with most cases arising in the oral cavity. Oral squamous cell carcinoma (OSCC) is the most common type of oral cancer, accounting for over 90% of all cases. Compared to other types of cancer, OSCC, has the worse prognosis, with a 5-year survival rate of 50%. Additionally, OSCC is characterized by a high rate of resistance to chemotherapy treatment, which may be partly explained by the presence of cancer stem cells (CSC) subpopulation. CSC can adapt to harmful environmental condition and are highly resistant to both chemotherapy and radiotherapy treatments, thus contributing to tumor relapse. The aim of this review is to highlight the role of mitochondria in oral CSC as a potential target for oral cancer treatment. For this purpose, we reviewed some fundamental aspects of the most validated protein markers of stemness, autophagy, the mitochondrial function and energy metabolism in oral CSC. Moreover, a discussion will be made on why energy metabolism, especially oxidative phosphorylation in CSC, may offer such a diverse source of original pharmacological target for new drugs. Finally, we will describe some drugs able to disturb mitochondrial function, with emphasis on those aimed to interrupt the electron transport chain function, as novel therapeutic strategies in multidrug-resistant oral CSC. The reutilization of old drugs approved for clinical use as new antineoplastics, in cancer treatment, is also matter of revision.
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Affiliation(s)
- Ivonne Olmedo
- Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Daniela Martínez
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Javiera Carrasco-Rojas
- Center for Regenerative Medicine, School of Medicine, Clínica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - José A Jara
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, Universidad de Chile, Santiago, Chile; Department of Toxicological and Pharmacological Chemistry, Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile.
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Buelvas N, Ugarte-Vio I, Asencio-Leal L, Muñoz-Uribe M, Martin-Martin A, Rojas-Fernández A, Jara JA, Tapia JC, Arias ME, López-Muñoz RA. Indomethacin Induces Spermidine/Spermine-N 1-Acetyltransferase-1 via the Nucleolin-CDK1 Axis and Synergizes with the Polyamine Oxidase Inhibitor Methoctramine in Lung Cancer Cells. Biomolecules 2023; 13:1383. [PMID: 37759783 PMCID: PMC10526249 DOI: 10.3390/biom13091383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
Indomethacin is a non-selective NSAID used against pain and inflammation. Although cyclooxygenase (COX) inhibition is considered indomethacin's primary action mechanism, COX-independent ways are associated with beneficial effects in cancer. In colon cancer cells, the activation of the peroxisome proliferator-activated receptor-γ (PPAR-γ) is related to the increase in spermidine/spermine-N1-acetyltransferase-1 (SSAT-1), a key enzyme for polyamine degradation, and related to cell cycle arrest. Indomethacin increases the SSAT-1 levels in lung cancer cells; however, the mechanism relying on the SSAT-1 increase is unclear. Thus, we asked for the influence of the PPAR-γ on the SSAT-1 expression in two lung cancer cell lines: H1299 and A549. We found that the inhibition of PPAR-γ with GW9662 did not revert the increase in SSAT-1 induced by indomethacin. Because the mRNA of SSAT-1 suffers a pre-translation retention step by nucleolin, a nucleolar protein, we explored the relationship between indomethacin and the upstream translation regulators of SSAT-1. We found that indomethacin decreases the nucleolin levels and the cyclin-dependent kinase 1 (CDK1) levels, which phosphorylates nucleolin in mitosis. Overexpression of nucleolin partially reverts the effect of indomethacin over cell viability and SSAT-1 levels. On the other hand, Casein Kinase, known for phosphorylating nucleolin during interphase, is not modified by indomethacin. SSAT-1 exerts its antiproliferative effect by acetylating polyamines, a process reverted by the polyamine oxidase (PAOX). Recently, methoctramine was described as the most specific inhibitor of PAOX. Thus, we asked if methoctramine could increase the effect of indomethacin. We found that, when combined, indomethacin and methoctramine have a synergistic effect against NSCLC cells in vitro. These results suggest that indomethacin increases the SSAT-1 levels by reducing the CDK1-nucleolin regulatory axis, and the PAOX inhibition with methoctramine could improve the antiproliferative effect of indomethacin.
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Affiliation(s)
- Neudo Buelvas
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - Isidora Ugarte-Vio
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - Laura Asencio-Leal
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - Matías Muñoz-Uribe
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - Antonia Martin-Martin
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - Alejandro Rojas-Fernández
- Instituto de Medicina, Facultad de Medicina, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
| | - José A. Jara
- Instituto de Investigaciones en Ciencias Odontológicas (ICOD), Facultad de Odontología, Universidad de Chile, Santiago P.O. Box 8380544, Chile
| | - Julio C. Tapia
- Programa de Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago P.O. Box 8380453, Chile
| | - María Elena Arias
- Departamento de Producción Agropecuaria, Universidad de La Frontera, Temuco P.O. Box 4811230, Chile
| | - Rodrigo A. López-Muñoz
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia P.O. Box 5110566, Chile
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Bastidas H, Araya-Valdés G, Cortés G, Jara JA, Catalán M. Pharmacological Effects of Caffeic Acid and Its Derivatives in Cancer: New Targeted Compounds for the Mitochondria. Advances in Experimental Medicine and Biology 2022; 1401:213-225. [DOI: 10.1007/5584_2022_718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Catalán M, Olmedo I, Faúndez J, Jara JA. Medicinal Chemistry Targeting Mitochondria: From New Vehicles and Pharmacophore Groups to Old Drugs with Mitochondrial Activity. Int J Mol Sci 2020; 21:E8684. [PMID: 33217901 PMCID: PMC7698797 DOI: 10.3390/ijms21228684] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 12/11/2022] Open
Abstract
Interest in tumor cell mitochondria as a pharmacological target has been rekindled in recent years. This attention is due in part to new publications documenting heterogenous characteristics of solid tumors, including anoxic and hypoxic zones that foster cellular populations with differentiating metabolic characteristics. These populations include tumor-initiating or cancer stem cells, which have a strong capacity to adapt to reduced oxygen availability, switching rapidly between glycolysis and oxidative phosphorylation as sources of energy and metabolites. Additionally, this cell subpopulation shows high chemo- and radioresistance and a high capacity for tumor repopulation. Interestingly, it has been shown that inhibiting mitochondrial function in tumor cells affects glycolysis pathways, cell bioenergy, and cell viability. Therefore, mitochondrial inhibition may be a viable strategy for eradicating cancer stem cells. In this context, medicinal chemistry research over the last decade has synthesized and characterized "vehicles" capable of transporting novel or existing pharmacophores to mitochondrial tumor cells, based on mechanisms that exploit the physicochemical properties of the vehicles and the inherent properties of the mitochondria. The pharmacophores, some of which have been isolated from plants and others, which were synthesized in the lab, are diverse in chemical nature. Some of these molecules are active, while others are prodrugs that have been evaluated alone or linked to mitochondria-targeted agents. Finally, researchers have recently described drugs with well-proven safety and efficacy that may exert a mitochondria-specific inhibitory effect in tumor cells through noncanonical mechanisms. The effectiveness of these molecules may be improved by linking them to mitochondrial carrier molecules. These promising pharmacological agents should be evaluated alone and in combination with classic chemotherapeutic drugs in clinical studies.
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Affiliation(s)
- Mabel Catalán
- Clinical and Molecular Pharmacology Program, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Independencia 1027, Santiago 8380453, Chile;
| | - Ivonne Olmedo
- Physiopathology Program, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Independencia 1027, Santiago 8380453, Chile;
| | - Jennifer Faúndez
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, Universidad de Chile, Olivos 943, Santiago 8380544, Chile;
| | - José A. Jara
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, Universidad de Chile, Olivos 943, Santiago 8380544, Chile;
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Müller-Sepúlveda A, Chevecich CC, Jara JA, Belmar C, Sandoval P, Meyer RS, Quijada R, Moura S, López-Muñoz R, Díaz-Dosque M, Molina-Berríos A. Chemical Characterization of Lavandula dentata Essential Oil Cultivated in Chile and Its Antibiofilm Effect against Candida albicans. Planta Med 2020; 86:1225-1234. [PMID: 32663893 DOI: 10.1055/a-1201-3375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Candida albicans is the most common human fungal pathogen, and with the increase in resistance rates worldwide, it is necessary to search for new pharmacological alternatives. Lavandula dentata L. essential oil is recognized as having antimicrobial properties. However, its effect against fungal biofilms has been poorly described. C. albicans-related infections involve the development of biofilms, which are highly resistant to conventional antifungals. In this work, we evaluated the antibiofilm effect of L. dentata L. essential oil against C. albicans. First, we characterized the essential oil by gas chromatography-mass spectrometry. The antifungal effect on C. albicans reference strains was evaluated by a disk diffusion assay and the minimal inhibitory concentration was obtained through a microdilution assay. The effect of the essential oil on the adhesion ability of C. albicans was determined through a crystal violet assay, and morphogenesis inhibition was assessed by light microscopy. The effect of the essential oil on the microarchitecture of biofilms was evaluated through scanning electron microscopy. Finally, the antibiofilm effect was evaluated through an adapted biofilm scratch assay and XTT viability assay. The main constituent of the essential oil was the monoterpenoid eucalyptol (60%). The essential oil presented minimal inhibitory concentrations of 156 and 130 µg/mL against two strains assayed. This minimal inhibitory concentration inhibited adhesion, morphogenesis, biofilm formation, altered microarchitecture, and decreased the viability of established biofilms formed on abiotic surfaces for both strains assayed. This study demonstrates that the essential oil from L. dentata could be a promising treatment against C. albicans biofilms.
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Affiliation(s)
- Andrea Müller-Sepúlveda
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
- Institute of Agrifood, Animals and Environmental Sciences, Universidad de O'Higgins, Rancagua, Chile
| | - Camila Cid Chevecich
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
| | - José A Jara
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Carolina Belmar
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Pablo Sandoval
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Rocío Santander Meyer
- Departament of Environmental Sciences, Faculty of Chemistry and Biology, Universidad de Santiago de Chile, Santiago, Chile
| | - Raúl Quijada
- Faculty of Physical and Mathematical Sciences, Universidad de Chile, Santiago, Chile
| | - Sidnei Moura
- Laboratory of Biotechnology of Natural and Synthetic Products, Biotechnology Institute, Universidade de Caixas do Sul, Caixas do Sul, Brazil
| | - Rodrigo López-Muñoz
- Institute of Pharmacology and Morphophysiology, Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile
| | - Mario Díaz-Dosque
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Alfredo Molina-Berríos
- Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile
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Catalán M, Castro-Castillo V, Gajardo-de la Fuente J, Aguilera J, Ferreira J, Ramires-Fernandez R, Olmedo I, Molina-Berríos A, Palominos C, Valencia M, Domínguez M, Souto JA, Jara JA. Continuous flow synthesis of lipophilic cations derived from benzoic acid as new cytotoxic chemical entities in human head and neck carcinoma cell lines. RSC Med Chem 2020; 11:1210-1225. [PMID: 33479625 DOI: 10.1039/d0md00153h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 07/30/2020] [Indexed: 01/17/2023] Open
Abstract
Continuous flow chemistry was used for the synthesis of a series of delocalized lipophilic triphenylphosphonium cations (DLCs) linked by means of an ester functional group to several hydroxylated benzoic acid derivatives and evaluated in terms of both reaction time and selectivity. The synthesized compounds showed cytotoxic activity and selectivity in head and neck tumor cell lines. The mechanism of action of the molecules involved a mitochondrial uncoupling effect and a decrease in both intracellular ATP production and apoptosis induction.
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Affiliation(s)
- Mabel Catalán
- Clinical and Molecular Pharmacology Program , Institute of Biomedical Sciences (ICBM) , Faculty of Medicine , Universidad de Chile , Santiago , 8380453 , Chile
| | - Vicente Castro-Castillo
- Department of Organic and Physical Chemistry , Faculty of Chemical and Pharmaceutical Sciences , Universidad de Chile , Santos Dumont 964 , Santiago 8380494 , Chile
| | - Javier Gajardo-de la Fuente
- Department of Organic and Physical Chemistry , Faculty of Chemical and Pharmaceutical Sciences , Universidad de Chile , Santos Dumont 964 , Santiago 8380494 , Chile
| | - Jocelyn Aguilera
- Institute for Research in Dental Sciences (ICOD) , Faculty of Dentistry , Universidad de Chile , Santiago , 8380492 , Chile . ; Tel: +56 2 29781730
| | - Jorge Ferreira
- Clinical and Molecular Pharmacology Program , Institute of Biomedical Sciences (ICBM) , Faculty of Medicine , Universidad de Chile , Santiago , 8380453 , Chile
| | | | - Ivonne Olmedo
- Physiopathology Program , Institute of Biomedical Sciences (ICBM) , Faculty of Medicine , Universidad de Chile , Santiago 8380453 , Chile
| | - Alfredo Molina-Berríos
- Institute for Research in Dental Sciences (ICOD) , Faculty of Dentistry , Universidad de Chile , Santiago , 8380492 , Chile . ; Tel: +56 2 29781730
| | - Charlotte Palominos
- Clinical and Molecular Pharmacology Program , Institute of Biomedical Sciences (ICBM) , Faculty of Medicine , Universidad de Chile , Santiago , 8380453 , Chile
| | - Marcelo Valencia
- Clinical and Molecular Pharmacology Program , Institute of Biomedical Sciences (ICBM) , Faculty of Medicine , Universidad de Chile , Santiago , 8380453 , Chile
| | - Marta Domínguez
- Departamento de Química Orgánica , Facultad de Química , CINBIO and IIS Galicia Sur , Universidade de Vigo , E-36310 , Vigo , Spain .
| | - José A Souto
- Departamento de Química Orgánica , Facultad de Química , CINBIO and IIS Galicia Sur , Universidade de Vigo , E-36310 , Vigo , Spain .
| | - José A Jara
- Institute for Research in Dental Sciences (ICOD) , Faculty of Dentistry , Universidad de Chile , Santiago , 8380492 , Chile . ; Tel: +56 2 29781730
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Cortes LA, Castro L, Pesce B, Maya JD, Ferreira J, Castro-Castillo V, Parra E, Jara JA, López-Muñoz R. Novel Gallate Triphenylphosphonium Derivatives with Potent Antichagasic Activity. PLoS One 2015; 10:e0136852. [PMID: 26317199 PMCID: PMC4552745 DOI: 10.1371/journal.pone.0136852] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/16/2015] [Indexed: 11/23/2022] Open
Abstract
Chagas disease is one of the most neglected tropical diseases in the world, affecting nearly 15 million people, primarily in Latin America. Only two drugs are used for the treatment of this disease, nifurtimox and benznidazole. These drugs have limited efficacy and frequently induce adverse effects, limiting their usefulness. Consequently, new drugs must be found. In this study, we demonstrated the in vitro trypanocidal effects of a series of four gallic acid derivatives characterized by a gallate group linked to a triphenylphosphonium (TPP+) moiety (a delocalized cation) via a hydrocarbon chain of 8, 10, 11, or 12 atoms (TPP+-C8, TPP+-C10, TPP+-C11, and TPP+-C12, respectively). We analyzed parasite viability in isolated parasites (by MTT reduction and flow cytometry) and infected mammalian cells using T. cruzi Y strain trypomastigotes. Among the four derivatives, TPP+-C10 and TPP+-C12 were the most potent in both models, with EC50 values (in isolated parasites) of 1.0 ± 0.6 and 1.0 ± 0.7 μM, respectively, and were significantly more potent than nifurtimox (EC50 = 4.1 ± 0.6 μM). At 1 μM, TPP+-C10 and TPP+-C12 induced markers of cell death, such as phosphatidylserine exposure and propidium iodide permeabilization. In addition, at 1 μM, TPP+-C10 and TPP+-C12 significantly decreased the number of intracellular amastigotes (TPP+-C10: 24.3%, TPP+-C12: 19.0% of control measurements, as measured by DAPI staining) and the parasite’s DNA load (C10: 10%, C12: 13% of control measurements, as measured by qPCR). Based on the previous mode of action described for these compounds in cancer cells, we explored their mitochondrial effects in isolated trypomastigotes. TPP+-C10 and TPP+-C12 were the most potent compounds, significantly altering mitochondrial membrane potential at 1 μM (measured by JC-1 fluorescence) and inducing mitochondrial transition pore opening at 5 μM. Taken together, these results indicate that the TPP+-C10 and TPP+-C12 derivatives of gallic acid are promising trypanocidal agents with mitochondrial activity.
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Affiliation(s)
- Leonel A. Cortes
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Lorena Castro
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Bárbara Pesce
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Juan D. Maya
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Jorge Ferreira
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Vicente Castro-Castillo
- Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
| | - Eduardo Parra
- Laboratory of Experimental Biomedicine, University of Tarapacá, Iquique, Chile
| | - José A. Jara
- Unidad de Farmacología y Farmacogenética, ICOD, Facultad de Odontología, Universidad de Chile, Santiago, Chile
- * E-mail: (RLM), (JAJ)
| | - Rodrigo López-Muñoz
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
- * E-mail: (RLM), (JAJ)
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Jara JA, López-Muñoz R. Metformin and cancer: Between the bioenergetic disturbances and the antifolate activity. Pharmacol Res 2015; 101:102-8. [PMID: 26277279 DOI: 10.1016/j.phrs.2015.06.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 06/23/2015] [Accepted: 06/24/2015] [Indexed: 01/18/2023]
Abstract
For decades, metformin has been the first-line drug for the treatment of type II diabetes mellitus, and it thus is the most widely prescribed antihyperglycemic drug. Retrospective studies associate the use of metformin with a reduction in cancer incidence and cancer-related death. However, despite extensive research about the molecular effects of metformin in cancer cells, its mode of action remains controversial. In this review, we summarize the current molecular evidence in an effort to elucidate metformin's mode of action against cancer cells. Some authors describe that metformin acts directly on mitochondria, inhibiting complex I and restricting the cell's ability to cope with energetic stress. Furthermore, as the drug interrupts the tricarboxylic acid cycle, metformin-induced alteration of mitochondrial function leads to a compensatory increase in lactate and glycolytic ATP. It has also been reported that cell cycle arrest, autophagy, apoptosis and cell death induction is mediated by the activation of AMPK and Redd1 proteins, thus inhibiting the mTOR pathway. Additionally, unbiased metabolomics studies have provided strong evidence to support that metformin alters the methionine and folate cycles, with a concomitant decrease in nucleotide synthesis. Indeed, purines such as thymidine or hypoxanthine restore the proliferation of tumor cells treated with metformin in vitro. Consequently, some authors prefer to refer to metformin as an "antimetabolite drug" rather than a "mitochondrial toxin". Finally, we also review the current controversy concerning the relationship between the experimental conditions of in vitro-reported effects and the plasma concentrations achieved by chronic treatment with metformin.
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Affiliation(s)
- J A Jara
- Unidad de Farmacología y Farmacogenética, ICOD, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - R López-Muñoz
- Instituto de Farmacología y Morfofisiología, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile.
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Jara JA, Castro-Castillo V, Saavedra-Olavarría J, Peredo L, Pavanni M, Jaña F, Letelier ME, Parra E, Becker MI, Morello A, Kemmerling U, Maya JD, Ferreira J. Antiproliferative and uncoupling effects of delocalized, lipophilic, cationic gallic acid derivatives on cancer cell lines. Validation in vivo in singenic mice. J Med Chem 2014; 57:2440-54. [PMID: 24568614 DOI: 10.1021/jm500174v] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tumor cells principally exhibit increased mitochondrial transmembrane potential (ΔΨ(m)) and altered metabolic pathways. The therapeutic targeting and delivery of anticancer drugs to the mitochondria might improve treatment efficacy. Gallic acid exhibits a variety of biological activities, and its ester derivatives can induce mitochondrial dysfunction. Four alkyl gallate triphenylphosphonium lipophilic cations were synthesized, each differing in the size of the linker chain at the cationic moiety. These derivatives were selectively cytotoxic toward tumor cells. The better compound (TPP(+)C10) contained 10 carbon atoms within the linker chain and exhibited an IC50 value of approximately 0.4-1.6 μM for tumor cells and a selectivity index of approximately 17-fold for tumor compared with normal cells. Consequently, its antiproliferative effect was also assessed in vivo. The oxygen consumption rate and NAD(P)H oxidation levels increased in the tumor cell lines (uncoupling effect), resulting in a ΔΨ(m) decrease and a consequent decrease in intracellular ATP levels. Moreover, TPP(+)C10 significantly inhibited the growth of TA3/Ha tumors in mice. According to these results, the antineoplastic activity and safety of TPP(+)C10 warrant further comprehensive evaluation.
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Affiliation(s)
- José A Jara
- Clinical and Molecular Pharmacology Program, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, University of Chile , Independencia 1027, Santiago 8380453, Chile
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Williams ST, Knowlton N, Weigt LA, Jara JA. Evidence for three major clades within the snapping shrimp genus Alpheus inferred from nuclear and mitochondrial gene sequence data. Mol Phylogenet Evol 2001; 20:375-89. [PMID: 11527465 DOI: 10.1006/mpev.2001.0976] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The snapping shrimp genus Alpheus is among the most diverse of caridean shrimps, and analyses of taxa separated by the Isthmus of Panama have been used to estimate rates of molecular evolution. Although seven morphological groups have been informally suggested, no formal phylogenetic analysis of the genus has been previously attempted. Here we infer the phylogenetic relationships within Alpheus using sequence data from two nuclear genes, glucose-6-phosphate isomerase and elongation factor-1alpha, and from the mitochondrial gene cytochrome oxidase I. Three major clades corresponding to previously noted morphological features were identified. Discrepancies between earlier informal morphological groupings and molecular analyses largely consisted of species whose morphologies were not entirely typical of the group to which they had been assigned. The traditional placements of shrimp with highly sessile lifestyles and consequently simplified morphologies were also not supported by molecular analyses. Phylogenies for Alpheus suggest that specialized ecological requirements (e.g., symbiotic associations and estuarine habitats) and modified claw morphologies have evolved independently several times. These new analyses also support the sister species status of transisthmian pairs analyzed previously, although very similar pairs were not always resolved with the more slowly evolving nuclear loci. In addition, six new cryptic species were identified in the course of these studies plus a seventh whose status remains to be determined.
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Affiliation(s)
- S T Williams
- Smithsonian Tropical Research Institute, Naos Marine Laboratory, USA
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