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Klosowski EM, de Souza BTL, Nanami LF, Bizerra PFV, Mito MS, Esquissato GNM, Constantin RP, Joia BM, Menezes PVMDC, Caetano W, Pereira PCDS, Gonçalves RS, Garcia FP, Bidoia DL, Nakamura TU, Nakamura CV, Ishii-Iwamoto EL, Dos Santos WD, Ferrarese-Filho O, Marchiosi R, Constantin RP. Unraveling the intrinsic and photodynamic effects of aluminum chloride phthalocyanine on bioenergetics and oxidative state in rat liver mitochondria. Toxicol Appl Pharmacol 2025; 494:117157. [PMID: 39551162 DOI: 10.1016/j.taap.2024.117157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 11/08/2024] [Accepted: 11/12/2024] [Indexed: 11/19/2024]
Abstract
Previous research has revealed that mitochondria are an important target for photodynamic therapy (PDT), which might be employed as a therapeutic approach for several malignancies, including hepatocellular carcinoma (HCC). In this study, we investigated both intrinsic toxicity and photodynamic effects of the photosensitizer (PS) aluminum chloride phthalocyanine (AlClPc) on mitochondrial functions. Several aspects of mitochondrial bioenergetics, structure, and oxidative state were investigated in the isolated mitochondria obtained from rat liver by differential centrifugation. Additionally, experiments were conducted to demonstrate the intrinsic and photodynamic effects of AlClPc on the viability of HepG2 cells. AlClPc interacted with mitochondria regardless of photostimulation; however, at the maximum utilized concentration (40 μM), photostimulation reduced its interaction with mitochondria. Although AlClPc hindered catalase (CAT) and glutathione reductase (GR) activities intrinsically, it had no discernable capacity to generate oxidative stress or impact bioenergetics in mitochondria without photostimulation, as one would anticipate from an ideal PS. When exposed to light, however, AlClPc had a substantially unfavorable influence on mitochondrial function, strengthening its intrinsic inhibitory action on CAT, producing oxidative stress, and jeopardizing mitochondrial bioenergetics. In terms of oxidative stress parameters, AlClPc induced lipid peroxidation and decreased the level of reduced glutathione (GSH) in mitochondria. Regarding bioenergetics, AlClPc promoted oxidative phosphorylation uncoupling and photodynamic inactivation of complex I, complex II, and the FoF1-ATP synthase complex, lowering mitochondrial ATP production. Lastly, AlClPc exhibited a concentration-dependent decrease in the viability of HepG2 cells, regardless of the presence or absence of photostimulation. While the harmful photodynamic effects of AlClPc on mitochondrial bioenergetics hold promise for treating HCC and other malignancies, the inherent toxic impacts on HepG2 cells underscore the need for caution in its application for this purpose.
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Affiliation(s)
- Eduardo Makiyama Klosowski
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Byanca Thais Lima de Souza
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Letícia Fernanda Nanami
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Paulo Francisco Veiga Bizerra
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Márcio Shigueaki Mito
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | | | - Renato Polimeni Constantin
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Breno Miguel Joia
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | | | - Wilker Caetano
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Paulo Cesar de Souza Pereira
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá 87020-900, Paraná, Brazil
| | - Renato Sonchini Gonçalves
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Francielle Pelegrin Garcia
- Department of Basic Health Sciences, Laboratory of Technological Innovation in the Development of Pharmaceuticals and Cosmetics, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Danielle Lazarin Bidoia
- Department of Basic Health Sciences, Laboratory of Technological Innovation in the Development of Pharmaceuticals and Cosmetics, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Tânia Ueda Nakamura
- Department of Basic Health Sciences, Laboratory of Technological Innovation in the Development of Pharmaceuticals and Cosmetics, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Celso Vataru Nakamura
- Department of Basic Health Sciences, Laboratory of Technological Innovation in the Development of Pharmaceuticals and Cosmetics, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Emy Luiza Ishii-Iwamoto
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Wanderley Dantas Dos Santos
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Osvaldo Ferrarese-Filho
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Rogério Marchiosi
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Rodrigo Polimeni Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil; Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
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de Queiroz Eskuarek Melo NM, Comar JF, de Sá-Nakanishi AB, Peralta RM, Bracht L, Bracht A. Short-term effects of sodium arsenite (AsIII) and sodium arsenate (AsV) on carbohydrate metabolism in the perfused rat liver. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2024; 107:104397. [PMID: 38401815 DOI: 10.1016/j.etap.2024.104397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/04/2024] [Accepted: 02/21/2024] [Indexed: 02/26/2024]
Abstract
The actions of arsenite and arsenate on carbohydrate metabolism in the once-through perfused rat liver were investigated. The compound inhibited lactate gluconeogenesis with an IC50 of 25 µM. It also increased glycolysis and fructolysis at concentrations between 10 and 100 µM. This effect was paralleled by strong inhibition of pyruvate carboxylation (IC50 = 4.25 µM) and by a relatively moderate diminution in the ATP levels. The inhibitory action of arsenate on pyruvate carboxylation and lactate gluconeogenesis was 103 times less effective than that of arsenite. For realistic doses and concentrations («1 mM), impairment of metabolism by arsenate can be expected to occur solely after its reduction to arsenite. Arsenite, on the other hand, can be regarded as a strong short-term modifier of lactate gluconeogenesis and other pathways. The main cause of the former is inhibition of pyruvate carboxylation, a hitherto unknown effect of arsenic compounds.
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Affiliation(s)
| | | | | | | | - Lívia Bracht
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Adelar Bracht
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil.
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3
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Pereira-Maróstica HV, Ames-Sibin AP, Pateis VDO, de Souza GH, Silva BP, Bracht L, Comar JF, Peralta RM, Bracht A, Sá-Nakanishi AB. Harmful effects of chlorhexidine on hepatic metabolism. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 102:104217. [PMID: 37442400 DOI: 10.1016/j.etap.2023.104217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 07/07/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023]
Abstract
Chlorhexidine (CHX) is an over-the-counter antiseptic amply used by the population. There are reports that CHX acts in mitochondria as an uncoupler and inhibitor. The purpose of this study was to investigate the short-term effects of CHX on hepatic metabolic pathways linked to energy metabolism in the perfused rat liver. The compound inhibited both glucose synthesis and the urea cycle. Oxygen consumption was raised at low concentrations (up to 10 μM) and diminished at higher ones. A pronounced diminution in the cellular ATP content was observed. Conversely, CHX stimulated glycolysis and enhanced leakage of cellular enzymes (lactate dehydrogenase and fumarase). In isolated mitochondria, this antiseptic inhibited pyruvate carboxylation, oxidases, and oxygen uptake at very low concentrations (2 μM) and promoted uncoupling. The results described herein raise great concerns about the safety of CHX, as the observed effects can induce hypoglycemia, lactic acidosis, ammonemia as well as cell membrane disruption.
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Affiliation(s)
| | | | - Vanesa de O Pateis
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Gustavo H de Souza
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Beatriz Paes Silva
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Lívia Bracht
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Jurandir F Comar
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Rosane M Peralta
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
| | - Adelar Bracht
- Department of Biochemistry, State University of Maringá, Maringá, PR, Brazil
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Bizerra PFV, Itou da Silva FS, Gilglioni EH, Nanami LF, Klosowski EM, de Souza BTL, Raimundo AFG, Paulino Dos Santos KB, Mewes JM, Constantin RP, Mito MS, Ishii-Iwamoto EL, Constantin J, Mingatto FE, Esquissato GNM, Marchiosi R, Dos Santos WD, Ferrarese-Filho O, Constantin RP. The harmful acute effects of clomipramine in the rat liver: impairments in mitochondrial bioenergetics. Toxicol Lett 2023:S0378-4274(23)00184-4. [PMID: 37217012 DOI: 10.1016/j.toxlet.2023.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/14/2023] [Accepted: 05/19/2023] [Indexed: 05/24/2023]
Abstract
Clomipramine, a tricyclic antidepressant used to treat depression and obsessive-compulsive disorder, has been linked to a few cases of acute hepatotoxicity. It is also recognized as a compound that hinders the functioning of mitochondria. Hence, the effects of clomipramine on mitochondria should endanger processes that are somewhat connected to energy metabolism in the liver. For this reason, the primary aim of this study was to examine how the effects of clomipramine on mitochondrial functions manifest in the intact liver. For this purpose, we used the isolated perfused rat liver, but also isolated hepatocytes and isolated mitochondria as experimental systems. According to the findings, clomipramine harmed metabolic processes and the cellular structure of the liver, especially the membrane structure. The considerable decrease in oxygen consumption in perfused livers strongly suggested that the mechanism of clomipramine toxicity involves the disruption of mitochondrial functions. Coherently, it could be observed that clomipramine inhibited both gluconeogenesis and ureagenesis, two processes that rely on ATP production within the mitochondria. Half-maximal inhibitory concentrations for gluconeogenesis and ureagenesis ranged from 36.87μM to 59.64μM. The levels of ATP as well as the ATP/ADP and ATP/AMP ratios were reduced, but distinctly, between the livers of fasted and fed rats. The results obtained from experiments conducted on isolated hepatocytes and isolated mitochondria unambiguously confirmed previous propositions about the effects of clomipramine on mitochondrial functions. These findings revealed at least three distinct mechanisms of action, including uncoupling of oxidative phosphorylation, inhibition of the FoF1-ATP synthase complex, and inhibition of mitochondrial electron flow. The elevation in activity of cytosolic and mitochondrial enzymes detected in the effluent perfusate from perfused livers, coupled with the increase in aminotransferase release and trypan blue uptake observed in isolated hepatocytes, provided further evidence of the hepatotoxicity of clomipramine. It can be concluded that impaired mitochondrial bioenergetics and cellular damage are important factors underlying the hepatotoxicity of clomipramine and that taking excessive amounts of clomipramine can lead to several risks including decreased ATP production, severe hypoglycemia, and potentially fatal outcomes.
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Affiliation(s)
- Paulo Francisco Veiga Bizerra
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Fernanda Sayuri Itou da Silva
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Eduardo Hideo Gilglioni
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Letícia Fernanda Nanami
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Eduardo Makiyama Klosowski
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Byanca Thais Lima de Souza
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Ana Flávia Gatto Raimundo
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Karina Borba Paulino Dos Santos
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Juliana Moraes Mewes
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Renato Polimeni Constantin
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Márcio Shigueaki Mito
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Emy Luiza Ishii-Iwamoto
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Jorgete Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Fábio Ermínio Mingatto
- Laboratory of Metabolic and Toxicological Biochemistry, São Paulo State University, Dracena 17900-000, São Paulo, Brazil.
| | | | - Rogério Marchiosi
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Wanderley Dantas Dos Santos
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Osvaldo Ferrarese-Filho
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
| | - Rodrigo Polimeni Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá 87020-900, Paraná, Brazil; Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá 87020-900, Paraná, Brazil.
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5
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Toluidine blue O directly and photodynamically impairs the bioenergetics of liver mitochondria: a potential mechanism of hepatotoxicity. Photochem Photobiol Sci 2023; 22:279-302. [PMID: 36152272 DOI: 10.1007/s43630-022-00312-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 09/19/2022] [Indexed: 10/14/2022]
Abstract
Toluidine blue O (TBO) is a phenothiazine dye that, due to its photochemical characteristics and high affinity for biomembranes, has been revealed as a new photosensitizer (PS) option for antimicrobial photodynamic therapy (PDT). This points to a possible association with membranous organelles like mitochondrion. Therefore, here we investigated its effects on mitochondrial bioenergetic functions both in the dark and under photostimulation. Two experimental systems were utilized: (a) isolated rat liver mitochondria and (b) isolated perfused rat liver. Our data revealed that, independently of photostimulation, TBO presented affinity for mitochondria. Under photostimulation, TBO increased the protein carbonylation and lipid peroxidation levels (up to 109.40 and 119.87%, respectively) and decreased the reduced glutathione levels (59.72%) in mitochondria. TBO also uncoupled oxidative phosphorylation and photoinactivated the respiratory chain complexes I, II, and IV, as well as the FoF1-ATP synthase complex. Without photostimulation, TBO caused uncoupling of oxidative phosphorylation and loss of inner mitochondrial membrane integrity and inhibited very strongly succinate oxidase activity. TBO's uncoupling effect was clearly seen in intact livers where it stimulated oxygen consumption at concentrations of 20 and 40 μM. Additionally, TBO (40 μM) reduced cellular ATP levels (52.46%) and ATP/ADP (45.98%) and ATP/AMP (74.17%) ratios. Consequently, TBO inhibited gluconeogenesis and ureagenesis whereas it stimulated glycogenolysis and glycolysis. In conclusion, we have revealed for the first time that the efficiency of TBO as a PS may be linked to its ability to photodynamically inhibit oxidative phosphorylation. In contrast, TBO is harmful to mitochondrial energy metabolism even without photostimulation, which may lead to adverse effects when used in PDT.
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Bruckmann FS, Schnorr C, Oviedo LR, Knani S, Silva LFO, Silva WL, Dotto GL, Bohn Rhoden CR. Adsorption and Photocatalytic Degradation of Pesticides into Nanocomposites: A Review. Molecules 2022; 27:6261. [PMID: 36234798 PMCID: PMC9572628 DOI: 10.3390/molecules27196261] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/12/2022] [Accepted: 09/17/2022] [Indexed: 11/16/2022] Open
Abstract
The extensive use of pesticides in agriculture has significantly impacted the environment and human health, as these pollutants are inadequately disposed of into water bodies. In addition, pesticides can cause adverse effects on humans and aquatic animals due to their incomplete removal from the aqueous medium by conventional wastewater treatments. Therefore, processes such as heterogeneous photocatalysis and adsorption by nanocomposites have received special attention in the scientific community due to their unique properties and ability to degrade and remove several organic pollutants, including pesticides. This report reviews the use of nanocomposites in pesticide adsorption and photocatalytic degradation from aqueous solutions. A bibliographic search was performed using the ScienceDirect, American Chemical Society (ACS), and Royal Society of Chemistry (RSC) indexes, using Boolean logic and the following descriptors: "pesticide degradation" AND "photocatalysis" AND "nanocomposites"; "nanocomposites" AND "pesticides" AND "adsorption". The search was limited to research article documents in the last ten years (from January 2012 to June 2022). The results made it possible to verify that the most dangerous pesticides are not the most commonly degraded/removed from wastewater. At the same time, the potential of the supported nanocatalysts and nanoadsorbents in the decontamination of wastewater-containing pesticides is confirmed once they present reduced bandgap energy, which occurs over a wide range of wavelengths. Moreover, due to the great affinity of the supported nanocatalysts with pesticides, better charge separation, high removal, and degradation values are reported for these organic compounds. Thus, the class of the nanocomposites investigated in this work, magnetic or not, can be characterized as suitable nanomaterials with potential and unique properties useful in heterogeneous photocatalysts and the adsorption of pesticides.
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Affiliation(s)
- Franciele S. Bruckmann
- Laboratório de Materiais Magnéticos Nanoestruturados, LaMMaN, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
- Programa de Pós-Graduação em Nanociências, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
| | - Carlos Schnorr
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55–66, Barranquilla 080002, Atlántico, Colombia
| | - Leandro R. Oviedo
- Programa de Pós-Graduação em Nanociências, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
| | - Salah Knani
- College of Science, Northern Border University, Arar 91431, Saudi Arabia
- Laboratory of Quantum and Statistical Physics, Faculty of Sciences of Monastir, University of Monastir, Monastir 5079, Tunisia
| | - Luis F. O. Silva
- Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55–66, Barranquilla 080002, Atlántico, Colombia
| | - William L. Silva
- Programa de Pós-Graduação em Nanociências, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
| | - Guilherme L. Dotto
- Research Group on Adsorptive and Catalytic Process Engineering (ENGEPAC), Department of Chemical Enginnering, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Cristiano R. Bohn Rhoden
- Laboratório de Materiais Magnéticos Nanoestruturados, LaMMaN, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
- Programa de Pós-Graduação em Nanociências, Universidade Franciscana-UFN, Santa Maria 97010-032, RS, Brazil
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7
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Itou da Silva FS, Veiga Bizerra PF, Mito MS, Constantin RP, Klosowski EM, Lima de Souza BT, Moreira da Costa Menezes PV, Alves Bueno PS, Nanami LF, Marchiosi R, Dantas Dos Santos W, Ferrarese-Filho O, Ishii-Iwamoto EL, Constantin RP. The metabolic and toxic acute effects of phloretin in the rat liver. Chem Biol Interact 2022; 364:110054. [PMID: 35872042 DOI: 10.1016/j.cbi.2022.110054] [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: 03/01/2022] [Revised: 06/24/2022] [Accepted: 07/13/2022] [Indexed: 11/30/2022]
Abstract
The current study sought to evaluate the acute effects of phloretin (PH) on metabolic pathways involved in the maintenance of glycemia, specifically gluconeogenesis and glycogenolysis, in the perfused rat liver. The acute effects of PH on energy metabolism and toxicity parameters in isolated hepatocytes and mitochondria, as well as its effects on the activity of a few key enzymes, were also evaluated. PH inhibited gluconeogenesis from different substrates, stimulated glycogenolysis and glycolysis, and altered oxygen consumption. The citric acid cycle activity was inhibited by PH under gluconeogenic conditions. Similarly, PH reduced the cellular ATP/ADP and ATP/AMP ratios under gluconeogenic and glycogenolytic conditions. In isolated mitochondria, PH inhibited the electron transport chain and the FoF1-ATP synthase complex as well as acted as an uncoupler of oxidative phosphorylation, inhibiting the synthesis of ATP. PH also decreased the activities of malate dehydrogenase, glutamate dehydrogenase, glucose 6-phosphatase, and glucose 6-phosphate dehydrogenase. Part of the bioenergetic effects observed in isolated mitochondria was shown in isolated hepatocytes, in which PH inhibited mitochondrial respiration and decreased ATP levels. An aggravating aspect might be the finding that PH promotes the net oxidation of NADH, which contradicts the conventional belief that the compound operates as an antioxidant. Although trypan blue hepatocyte viability tests revealed substantial losses in cell viability over 120 min of incubation, PH did not promote extensive enzyme leakage from injured cells. In line with this effect, only after a lengthy period of infusion did PH considerably stimulate the release of enzymes into the effluent perfusate of livers. In conclusion, the increased glucose release caused by enhanced glycogenolysis, along with suppression of gluconeogenesis, is the opposite of what is predicted for antihyperglycemic agents. These effects were caused in part by disruption of mitochondrial bioenergetics, a result that should be considered when using PH for therapeutic purposes, particularly over long periods and in large doses.
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Affiliation(s)
- Fernanda Sayuri Itou da Silva
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Francisco Veiga Bizerra
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Márcio Shigueaki Mito
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Renato Polimeni Constantin
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Eduardo Makiyama Klosowski
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Byanca Thais Lima de Souza
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | | | | | - Letícia Fernanda Nanami
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rogério Marchiosi
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Wanderley Dantas Dos Santos
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Osvaldo Ferrarese-Filho
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Emy Luiza Ishii-Iwamoto
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rodrigo Polimeni Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations, State University of Maringá, Maringá, 87020-900, Paraná, Brazil; Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
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8
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The rapid transformation of triclosan in the liver reduces its effectiveness as inhibitor of hepatic energy metabolism. Toxicol Appl Pharmacol 2022; 442:115987. [DOI: 10.1016/j.taap.2022.115987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/20/2022] [Accepted: 03/11/2022] [Indexed: 11/22/2022]
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9
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The photodynamic and intrinsic effects of Azure B on mitochondrial bioenergetics and the consequences of its intrinsic effects on hepatic energy metabolism. Photodiagnosis Photodyn Ther 2021; 35:102446. [PMID: 34289416 DOI: 10.1016/j.pdpdt.2021.102446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 06/16/2021] [Accepted: 07/12/2021] [Indexed: 01/10/2023]
Abstract
BACKGROUND The present study aimed to characterize the intrinsic and photodynamic effects of azure B (AB) on mitochondrial bioenergetics, as well as the consequences of its intrinsic effects on hepatic energy metabolism. METHODS Two experimental systems were utilized: (a) isolated rat liver mitochondria and (b) isolated perfused rat liver. RESULTS AB interacted with mitochondria regardless of photostimulation, but its binding degree was reduced by mitochondrial energization. Under photostimulation, AB caused lipid peroxidation and protein carbonylation and decreased the content of reduced glutathione (GSH) in mitochondria. AB impaired mitochondrial bioenergetics in at least three distinct ways: (1) uncoupling of oxidative phosphorylation; (2) photoinactivation of complexes I and II; and (3) photoinactivation of the FoF1-ATP synthase complex. Without photostimulation, AB also demonstrated mitochondrial toxicity, which was characterized by the induction of lipid peroxidation, loss of inner mitochondrial membrane integrity, and uncoupling of oxidative phosphorylation. The perfused rat liver experiments showed that mitochondria were one of the major targets of AB, even in intact cells. AB inhibited gluconeogenesis and ureagenesis, two biosynthetic pathways strictly dependent on intramitochondrially generated ATP. Contrariwise, AB stimulated glycogenolysis and glycolysis, which are required compensatory pathways for the inhibited oxidative phosphorylation. Similarly, AB reduced the cellular ATP content and the ATP/ADP and ATP/AMP ratios. CONCLUSIONS Although the properties and severe photodynamic effects of AB on rat liver mitochondria might suggest its usefulness in PDT treatment of liver tumors, this possibility should be considered with precaution given the toxic intrinsic effects of AB on mitochondrial bioenergetics and energy-linked hepatic metabolism.
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10
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de Souza BTL, Klosowski EM, Mito MS, Constantin RP, Mantovanelli GC, Mewes JM, Bizerra PFV, da Silva FSI, Menezes PVMDC, Gilglioni EH, Utsunomiya KS, Marchiosi R, Dos Santos WD, Ferrarese-Filho O, Caetano W, de Souza Pereira PC, Gonçalves RS, Constantin J, Ishii-Iwamoto EL, Constantin RP. The photosensitiser azure A disrupts mitochondrial bioenergetics through intrinsic and photodynamic effects. Toxicology 2021; 455:152766. [PMID: 33775737 DOI: 10.1016/j.tox.2021.152766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/24/2021] [Accepted: 03/23/2021] [Indexed: 12/20/2022]
Abstract
Azure A (AA) is a cationic molecule of the class of phenothiazines that has been applied in vitro as a photosensitising agent in photodynamic antimicrobial chemotherapy. It is a di-demethylated analogue of methylene blue (MB), which has been demonstrated to be intrinsically and photodynamically highly active on mitochondrial bioenergetics. However, as far as we know, there are no studies about the photodynamic effects of AA on mammalian mitochondria. Therefore, this investigation aimed to characterise the intrinsic and photodynamic acute effects of AA (0.540 μM) on isolated rat liver mitochondria, isolated hepatocytes, and isolated perfused rat liver. The effects of AA were assessed by evaluating several parameters of mitochondrial bioenergetics, oxidative stress, cell viability, and hepatic energy metabolism. The photodynamic effects of AA were assessed under simulated hypoxic conditions, a suitable way for mimicking the microenvironment of hypoxic solid tumour cells. AA interacted with the mitochondria and, upon photostimulation (10 min of light exposure), produced toxic amounts of reactive oxygen species (ROS), which damaged the organelle, as demonstrated by the high levels of lipid peroxidation and protein carbonylation. The photostimulated AA also depleted the GSH pool, which could compromise the mitochondrial antioxidant defence. Bioenergetically, AA photoinactivated the complexes I, II, and IV of the mitochondrial respiratory chain and the F1FO-ATP synthase complex, sharply inhibiting the oxidative phosphorylation. Upon photostimulation (10 min of light exposure), AA reduced the efficiency of mitochondrial energy transduction and oxidatively damaged lipids in isolated hepatocytes but did not decrease the viability of cells. Despite the useful photobiological properties, AA presented noticeable dark toxicity on mitochondrial bioenergetics, functioning predominantly as an uncoupler of oxidative phosphorylation. This harmful effect of AA was evidenced in isolated hepatocytes, in which AA diminished the cellular ATP content. In this case, the cells exhibited signs of cell viability reduction in the presence of high AA concentrations, but only after a long time of incubation (at least 90 min). The impairments on mitochondrial bioenergetics were also clearly manifested in intact perfused rat liver, in which AA diminished the cellular ATP content and stimulated the oxygen uptake. Consequently, gluconeogenesis and ureogenesis were strongly inhibited, whereas glycogenolysis and glycolysis were stimulated. AA also promoted the release of cytosolic and mitochondrial enzymes into the perfusate concomitantly with inhibition of oxygen consumption. In general, the intrinsic and photodynamic effects of AA were similar to those of MB, but AA caused some distinct effects such as the photoinactivation of the complex IV of the mitochondrial respiratory chain and a diminution of the ATP levels in the liver. It is evident that AA has the potential to be used in mitochondria-targeted photodynamic therapy, even under low oxygen concentrations. However, the fact that AA directly disrupts mitochondrial bioenergetics and affects several hepatic pathways that are linked to ATP metabolism, along with its ability to perturb cellular membranes and its little potential to reduce cell viability, could result in significant adverse effects especially in long-term treatments.
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Affiliation(s)
- Byanca Thais Lima de Souza
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Eduardo Makiyama Klosowski
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Márcio Shigueaki Mito
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Renato Polimeni Constantin
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Gislaine Cristiane Mantovanelli
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Juliana Morais Mewes
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Francisco Veiga Bizerra
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Fernanda Sayuri Itou da Silva
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Vinicius Moreira da Costa Menezes
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Eduardo Hideo Gilglioni
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Karina Sayuri Utsunomiya
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rogério Marchiosi
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Wanderley Dantas Dos Santos
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Osvaldo Ferrarese-Filho
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Wilker Caetano
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Cesar de Souza Pereira
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Renato Sonchini Gonçalves
- Department of Chemistry, Research Nucleus in Photodynamic System, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Jorgete Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Emy Luiza Ishii-Iwamoto
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rodrigo Polimeni Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil; Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
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11
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Klosowski EM, de Souza BTL, Mito MS, Constantin RP, Mantovanelli GC, Mewes JM, Bizerra PFV, Menezes PVMDC, Gilglioni EH, Utsunomiya KS, Marchiosi R, Dos Santos WD, Filho OF, Caetano W, Pereira PCDS, Gonçalves RS, Constantin J, Ishii-Iwamoto EL, Constantin RP. The photodynamic and direct actions of methylene blue on mitochondrial energy metabolism: A balance of the useful and harmful effects of this photosensitizer. Free Radic Biol Med 2020; 153:34-53. [PMID: 32315767 DOI: 10.1016/j.freeradbiomed.2020.04.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/13/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023]
Abstract
According to the literature, methylene blue (MB) is a photosensitizer (PS) with a high affinity for mitochondria. Therefore, several studies have explored this feature to evaluate its photodynamic effects on the mitochondrial apoptotic pathway under normoxic conditions. We are aware only of limited reports regarding MB's photodynamic effects on mitochondrial energy metabolism, especially under hypoxic conditions. Thus, the purposes of this study were to determine the direct and photodynamic acute effects of MB on the energy metabolism of rat liver mitochondria under hypoxic conditions and its direct acute effects on several parameters linked to energy metabolism in the isolated perfused rat liver. MB presented a high affinity for mitochondria, irrespective of photostimulation or proton gradient formation. Upon photostimulation, MB demonstrated high in vitro oxidizing species generation ability. Consequently, MB damaged the mitochondrial macromolecules, as could be evidenced by the elevated levels of lipid peroxidation and protein carbonyls. In addition to generating a pro-oxidant environment, MB also led to a deficient antioxidant defence system, as indicated by the reduced glutathione (GSH) depletion. Bioenergetically, MB caused uncoupling of oxidative phosphorylation and led to photodynamic inactivation of complex I, complex II, and F1FO-ATP synthase complex, thus decreasing mitochondrial ATP generation. Contrary to what is expected for an ideal PS, MB displayed appreciable dark toxicity on mitochondrial energy metabolism. The results indicated that MB acted via at least three mechanisms: direct damage to the inner mitochondrial membrane; uncoupling of oxidative phosphorylation; and inhibition of electron transfer. Confirming the impairment of mitochondrial energy metabolism, MB also strongly inhibited mitochondrial ATP production. In the perfused rat liver, MB stimulated oxygen consumption, decreased the ATP/ADP ratio, inhibited gluconeogenesis and ureogenesis, and stimulated glycogenolysis, glycolysis, and ammoniagenesis, fully corroborating its uncoupling action in intact cells, as well. It can be concluded that even under hypoxic conditions, MB is a PS with potential for photodynamic effect-induced mitochondrial dysfunction. However, MB disrupts the mitochondrial energy metabolism even in the dark, causing energy-linked liver metabolic changes that could be harmful in specific circumstances.
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Affiliation(s)
- Eduardo Makiyama Klosowski
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Byanca Thais Lima de Souza
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Marcio Shigueaki Mito
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Renato Polimeni Constantin
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Gislaine Cristiane Mantovanelli
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Juliana Morais Mewes
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Francisco Veiga Bizerra
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Paulo Vinicius Moreira da Costa Menezes
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Eduardo Hideo Gilglioni
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Karina Sayuri Utsunomiya
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rogério Marchiosi
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Wanderley Dantas Dos Santos
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Osvaldo Ferrarese Filho
- Department of Biochemistry, Laboratory of Plant Biochemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Wilker Caetano
- Department of Chemistry, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | | | | | - Jorgete Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Emy Luiza Ishii-Iwamoto
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
| | - Rodrigo Polimeni Constantin
- Department of Biochemistry, Laboratory of Biological Oxidations and Laboratory of Experimental Steatosis, State University of Maringá, Maringá, 87020-900, Paraná, Brazil.
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12
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Bizerra PFV, Guimarães ARJS, Miranda CA, Constantin RP, Utsunomiya KS, Gilglioni EH, Constantin J, Ishii-Iwamoto EL, Maioli MA, Mingatto FE. Enhanced cytotoxicity of imidacloprid by biotransformation in isolated hepatocytes and perfused rat liver. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 164:183-190. [PMID: 32284125 DOI: 10.1016/j.pestbp.2020.01.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 06/11/2023]
Abstract
Imidacloprid (IMD) is a neonicotinoid insecticide widely used in crops, pets, and on farm animals for pest control, which can cause hepatotoxicity in animals and humans. In a previous study using isolated rat liver mitochondria, we observed that IMD inhibited the activity of FoF1-ATP synthase. The aim of this study was to evaluate the effects of IMD on rat isolated hepatocytes and perfused rat liver, besides the influence of its biotransformation on the toxicological potential. For the latter goal, rats were pretreated with dexamethasone or phenobarbital, two classical cytochrome P-450 stimulators, before hepatocytes isolation or liver perfusion. IMD (150 and 200 μM) reduced state 3 mitochondrial respiration in digitonin-permeabilized cells that were energized with glutamate plus malate but did not dissipate the mitochondrial membrane potential. In intact (non-permeabilized) hepatocytes, the intracellular ATP concentration and cell viability were reduced when high IMD concentrations were used (1.5-3.0 mM), and only in cells isolated from dexamethasone-pretreated rats, revealing that IMD biotransformation increases its toxicity and that IMD itself affects isolated mitochondria or mitochondria in permeabilized hepatocytes in concentrations that do not affect mitochondrial function in intact hepatocytes. Coherently, in the prefused liver, IMD (150 and 250 μM) inhibited gluconeogenesis from alanine, but without affecting oxygen consumption and urea production, indicating that such effect was not of mitochondrial origin. The gluconeogenesis inhibition was incomplete and occurred only when the rats were pretreated with phenobarbital, signs that IMD biotransformation was involved in the observed effect. Our findings reveal that changes in hepatic energy metabolism may be acutely implicated in the hepatotoxicity of IMD only when animals and humans are exposed to high levels of this compound, and that IMD metabolites seem to be the main cause for its toxicity.
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Affiliation(s)
- Paulo F V Bizerra
- College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, SP, Brazil; Department of Biochemistry, Maringá State University (UEM), Maringá, PR, Brazil
| | - Anilda R J S Guimarães
- College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, SP, Brazil
| | - Camila A Miranda
- College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, SP, Brazil
| | | | - Karina S Utsunomiya
- Department of Biochemistry, Maringá State University (UEM), Maringá, PR, Brazil
| | - Eduardo H Gilglioni
- Department of Biochemistry, Maringá State University (UEM), Maringá, PR, Brazil
| | - Jorgete Constantin
- Department of Biochemistry, Maringá State University (UEM), Maringá, PR, Brazil
| | - Emy L Ishii-Iwamoto
- Department of Biochemistry, Maringá State University (UEM), Maringá, PR, Brazil
| | - Marcos A Maioli
- School of Veterinary Medicine, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - Fábio E Mingatto
- College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, SP, Brazil.
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13
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Wahlang B, Jin J, Beier JI, Hardesty JE, Daly EF, Schnegelberger RD, Falkner KC, Prough RA, Kirpich IA, Cave MC. Mechanisms of Environmental Contributions to Fatty Liver Disease. Curr Environ Health Rep 2019; 6:80-94. [PMID: 31134516 PMCID: PMC6698418 DOI: 10.1007/s40572-019-00232-w] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE Fatty liver disease (FLD) affects over 25% of the global population and may lead to liver-related mortality due to cirrhosis and liver cancer. FLD caused by occupational and environmental chemical exposures is termed "toxicant-associated steatohepatitis" (TASH). The current review addresses the scientific progress made in the mechanistic understanding of TASH since its initial description in 2010. RECENT FINDINGS Recently discovered modes of actions for volatile organic compounds and persistent organic pollutants include the following: (i) the endocrine-, metabolism-, and signaling-disrupting chemical hypotheses; (ii) chemical-nutrient interactions and the "two-hit" hypothesis. These key hypotheses were then reviewed in the context of the steatosis adverse outcome pathway (AOP) proposed by the US Environmental Protection Agency. The conceptual understanding of the contribution of environmental exposures to FLD has progressed significantly. However, because this is a new research area, more studies including mechanistic human data are required to address current knowledge gaps.
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Affiliation(s)
- Banrida Wahlang
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, KY, 40202, USA
- University of Louisville Superfund Research Center, University of Louisville, Louisville, KY, 40202, USA
| | - Jian Jin
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Juliane I Beier
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh, Pittsburgh, PA, 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Josiah E Hardesty
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Erica F Daly
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Regina D Schnegelberger
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - K Cameron Falkner
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Russell A Prough
- Department of Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Irina A Kirpich
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, KY, 40202, USA
- Hepatobiology & Toxicology COBRE Center, University of Louisville School of Medicine, Louisville, KY, 40202, USA
- University of Louisville Alcohol Research Center, University of Louisville, Louisville, KY, 40202, USA
| | - Matthew C Cave
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- University of Louisville Superfund Research Center, University of Louisville, Louisville, KY, 40202, USA.
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- Department of Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- Hepatobiology & Toxicology COBRE Center, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- University of Louisville Alcohol Research Center, University of Louisville, Louisville, KY, 40202, USA.
- The Robley Rex Veterans Affairs Medical Center, Louisville, KY, 40206, USA.
- The Jewish Hospital Liver Transplant Program, Louisville, KY, 40202, USA.
- Kosair Charities Clinical & Translational Research Building, 505 South Hancock Street, Louisville, KY, 40202, USA.
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Bueno Franco Salla G, Bracht L, Valderrama Parizotto A, Comar JF, Peralta RM, Bracht F, Bracht A. Kinetics of the metabolic effects, distribution spaces and lipid-bilayer affinities of the organo-chlorinated herbicides 2,4-D and picloram in the liver. Toxicol Lett 2019; 313:137-149. [PMID: 31254607 DOI: 10.1016/j.toxlet.2019.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/24/2019] [Accepted: 06/25/2019] [Indexed: 10/26/2022]
Abstract
Tordon® is the commercial name of a mixture of two organo-chlorinated herbicides, 2,4-D and picloram. Both compounds affect energy transduction in isolated mitochondria and the present study aimed at characterizing the actions of these two compounds on liver metabolism and their cellular distribution in the isolated perfused rat liver. 2,4-D, but not picloram, increased glycolysis in the range from 10 to 400 μM. The redox potential of the cytosolic NAD+-NADH couple was also increased by 2,4-D. Both compounds inhibited lactate gluconeogenesis. Inhibitions by 2,4-D and picloram were incomplete, reaching maximally 46% and 23%, respectively. Both compounds diminished the cellular ATP levels. No synergism between the actions of 2,4-D and picloram was detected. Biotransformations of 2,4-D and picloram were slow, but their distributions occurred at high rates and were concentrative. Molecular dynamics simulations revealed that 2,4-D presented low affinity for the hydrophobic lipid bilayers, the opposite occurring with picloram. Inhibition of energy metabolism is possibly a relevant component of the toxicity of 2,4-D and of the commercial product Tordon®. Furthermore, the interactions of 2,4-D with the membrane lipid bilayer can be highly destructive and might equally be related to its cellular toxicity at high concentrations.
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Affiliation(s)
| | - Lívia Bracht
- Department of Biochemistry, University of Maringá, 87020900 Maringá, Brazil
| | | | | | | | - Fabrício Bracht
- Department of Biochemistry, University of Maringá, 87020900 Maringá, Brazil
| | - Adelar Bracht
- Department of Biochemistry, University of Maringá, 87020900 Maringá, Brazil.
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Wang J, Hallinger DR, Murr AS, Buckalew AR, Lougee RR, Richard AM, Laws SC, Stoker TE. High-throughput screening and chemotype-enrichment analysis of ToxCast phase II chemicals evaluated for human sodium-iodide symporter (NIS) inhibition. ENVIRONMENT INTERNATIONAL 2019; 126:377-386. [PMID: 30826616 PMCID: PMC9082575 DOI: 10.1016/j.envint.2019.02.024] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/14/2019] [Accepted: 02/07/2019] [Indexed: 05/26/2023]
Abstract
In support of the Endocrine Disruptor Screening Program (EDSP), the U.S.EPA's Office of Research and Development (ORD) is developing high-throughput screening (HTS) approaches to identify chemicals that alter target sites in the thyroid hormone (TH) pathway. The sodium iodide symporter (NIS) is a transmembrane glycoprotein that mediates iodide uptake into the thyroid as the initial step of TH biosynthesis. Previously, we screened 293 ToxCast chemicals (ph1v2) using a HEK293T cell line expressing human NIS in parallel radioactive iodide uptake (RAIU) and cell viability assays to identify potential environmental NIS inhibitors. Here, we expanded NIS inhibitor screening for a set of 768 ToxCast Phase II (ph2) chemicals, and applied a novel computational toxicology approach based on the ToxPrint chemotype to identify chemical substructures associated with NIS inhibition. Following single-concentration screening (at 1 × 10-4 M with a 20% inhibition cutoff), 235 samples (228 chemicals) were further tested in multiple-concentration (1 × 10-9 - 1 × 10-4 M) format in both RAIU and cell viability assays. The 167 chemicals that exhibited significant RAIU inhibition were then prioritized using combined RAIU and cell viability responses that were normalized relative to the known NIS inhibitor sodium perchlorate. Some of the highest ranked chemicals, such as PFOS, tributyltin chloride, and triclocarban, have been previously reported to be thyroid disruptors. In addition, several novel chemicals were identified as potent NIS inhibitors. The present results were combined with the previous ph1v2 screening results to produce two sets of binary hit-calls for 1028 unique chemicals, consisting of 273 positives exhibiting significant RAIU inhibition, and 63 positives following application of a cell viability filter. A ToxPrint chemotype-enrichment analysis identified >20 distinct chemical substructural features, represented in >60% of the active chemicals, as significantly enriched in each NIS inhibition hit-call space. A shared set of 9 chemotypes enriched in both hit-call sets indicates stable chemotype signals (insensitive to cytotoxicity filters) that can help guide structure-activity relationship (SAR) investigations and inform future research.
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Affiliation(s)
- Jun Wang
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA; Oak Ridge Institute for Science and Education, U.S. Department of Energy, Oak Ridge, TN 37831, USA
| | - Daniel R Hallinger
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Ashley S Murr
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Angela R Buckalew
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Ryan R Lougee
- Oak Ridge Institute for Science and Education, U.S. Department of Energy, Oak Ridge, TN 37831, USA; National Center for Computational Toxicology, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Ann M Richard
- National Center for Computational Toxicology, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Susan C Laws
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA.
| | - Tammy E Stoker
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA.
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16
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The food additive BHA modifies energy metabolism in the perfused rat liver. Toxicol Lett 2018; 299:191-200. [DOI: 10.1016/j.toxlet.2018.10.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/14/2018] [Accepted: 10/07/2018] [Indexed: 11/22/2022]
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The acute effects of citrus flavanones on the metabolism of glycogen and monosaccharides in the isolated perfused rat liver. Toxicol Lett 2018; 291:158-172. [PMID: 29626522 DOI: 10.1016/j.toxlet.2018.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 03/06/2018] [Accepted: 04/02/2018] [Indexed: 10/17/2022]
Abstract
Citrus flavanones are often linked to their antihyperglycemic properties. This effect may be in part due to the inhibition of hepatic gluconeogenesis through different mechanisms. One of the possible mechanisms appears to be impairment of oxidative phosphorylation, which may also interfere with glycogen metabolism. Based on these facts, the purpose of the present study was to investigate the effects of three citrus flavanones on glycogenolysis in the isolated perfused rat liver. Hesperidin, hesperetin, and naringenin stimulated glycogenolysis and glycolysis from glycogen with concomitant changes in oxygen uptake. At higher concentrations (300 μM), hesperetin and naringenin clearly altered fructose and glucose metabolism, whereas hesperidin exerted little to no effects. In subcellular fractions hesperetin and naringenin inhibited the activity of glucose 6-phosphatase and glucokinase and the mitochondrial respiration linked to ADP phosphorylation. Hesperetin and naringenin also inhibited the transport of glucose into the cell. At a concentration of 300 μM, the glucose influx rate inhibition was 83% and 43% for hesperetin and naringenin, respectively. Hesperidin was the less active among the assayed citrus flavanones, indicating that the rutinoside moiety noticeably decrease the activity of these compounds. The effects on glycogenolysis and fructolysis were mainly consequence of an impairment on mitochondrial energy metabolism. The increased glucose release, due to the higher glycogenolysis, together with glucose transport inhibition is the opposite of what is expected for antihyperglycemic agents.
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