1
|
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: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [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.
Collapse
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.
| |
Collapse
|
2
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|
3
|
da Costa Menezes PVM, Silva AA, Mito MS, Mantovanelli GC, Stulp GF, Wagner AL, Constantin RP, Baldoqui DC, Silva RG, Oliveira do Carmo AA, de Souza LA, de Oliveira Junior RS, Araniti F, Abenavoli MR, Ishii-Iwamoto EL. Morphogenic responses and biochemical alterations induced by the cover crop Urochloa ruziziensis and its component protodioscin in weed species. Plant Physiol Biochem 2021; 166:857-873. [PMID: 34237604 DOI: 10.1016/j.plaphy.2021.06.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/30/2021] [Accepted: 06/22/2021] [Indexed: 06/13/2023]
Abstract
Urochloa ruziziensis, a cover plant used in no-till systems, can suppress weeds in the field through their chemical compounds, but the mode of action of these compounds is still unknown. The present study aimed to investigate the effects of a saponin-rich butanolic extract from U. ruziziensis straw (BfUr) and one of its components, protodioscin on an eudicot Ipomoea grandifolia and a monocot Digitaria insularis weed. The anatomy and the morphology of the root systems and several parameters related to energy metabolism and antioxidant defense systems were examined. The IC50 values for the root growth inhibition by BfUr were 108 μg mL-1 in D. insularis and 230 μg mL-1 in I. grandifolia. The corresponding values for protodioscin were 34 μg mL-1 and 54 μg mL-1. I. grandifolia exhibited higher ROS-induced peroxidative damage in its roots compared with D. insularis. In the roots of both weeds, the BfUr and protodioscin induced a reduction in the meristematic and elongation zones with a precocious appearance of lateral roots, particularly in I. grandifolia. The roots also exhibited features of advanced cell differentiation in the vascular cylinder. These alterations were similar to stress-induced morphogenic responses (SIMRs), which are plant adaptive strategies to survive in the presence of toxicants. At concentrations above their IC50 values, the BfUr or protodioscin strongly inhibited the development of both weeds. Such findings demonstrated that U. ruziziensis mulches may contribute to the use of natural and renewable weed control tools.
Collapse
Affiliation(s)
| | - Adriano Antonio Silva
- Center of Biological Sciences and Nature, Federal University of Acre, Rio Branco, Brazil
| | | | | | | | | | | | | | | | | | | | | | - Fabrizio Araniti
- Department of Agricultural and Environmental Sciences, University of Milan, Italy
| | | | | |
Collapse
|
4
|
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: 1.3] [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: 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.
Collapse
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.
| |
Collapse
|
5
|
Mantovanelli GC, Mito MS, Ricardo LL, Menezes PVMDC, Carvalho Contesoto ID, Nascimento CRAD, Wagner Zampieri AL, Stulp GF, Constantin RP, Ishii-Iwamoto EL. Differential Effects of Exogenous Resveratrol on the Growth and Energy Metabolism of Zea mays and the Weed Ipomoea grandifolia. J Agric Food Chem 2020; 68:3006-3016. [PMID: 31986035 DOI: 10.1021/acs.jafc.9b06304] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An increase in crop competitiveness relative to weed interference has the potential to reduce crop yield losses. In this study, the effects of phytoalexin resveratrol were examined in Zea mays L. (corn) and in the weed species Ipomoea grandifolia (Dammer) O'Donell (morning glory). At a concentration range from 220 to 2200 μM resveratrol exerted a stimulus on Z. mays seedling growth that was more pronounced at low concentrations; in the weed species I. grandifolia, resveratrol exerted inhibitory action on seedling growth in all of the assayed concentration range. In I. grandifolia, resveratrol also inhibited the respiratory activity of the primary roots. In mitochondria isolated from Z. mays roots, resveratrol at concentrations above 440 μM inhibited the respiration coupled to ADP phosphorylation and the activities of NADH-oxidase, succinate-oxidase, and ATPsynthase. These effects were not reproduced in Z. mays grown in the presence of resveratrol as the respiratory activities of the roots were not affected. The finding that the resveratrol exerts beneficial effects on growth of Z. mays seedlings and inhibits the growth of I. grandifolia heightens the potential of resveratrol application for crop protection.
Collapse
Affiliation(s)
| | - Márcio Shigueaki Mito
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| | - Letycia Lopes Ricardo
- Department of Engineering and Exact Sciences, Federal University of Paraná, 85950000 Palotina, Brazil
| | | | - Isabela de Carvalho Contesoto
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| | | | - Ana Luiza Wagner Zampieri
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| | - Gabriel Felipe Stulp
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| | - Rodrigo Polimeni Constantin
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| | - Emy Luiza Ishii-Iwamoto
- Laboratory of Biological Oxidations, Department of Biochemistry, State University of Maringa, 87020900 Maringa, Brazil
| |
Collapse
|
6
|
Mito MS, Silva AA, Kagami FL, Almeida JD, Mantovanelli GC, Barbosa MC, Kern-Cardoso KA, Ishii-Iwamoto EL. Responses of the weed Bidens pilosa L. to exogenous application of the steroidal saponin protodioscin and plant growth regulators 24-epibrassinolide, indol-3-acetic acid and abscisic acid. Plant Biol (Stuttg) 2019; 21:326-335. [PMID: 30341820 DOI: 10.1111/plb.12927] [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] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 10/15/2018] [Indexed: 06/08/2023]
Abstract
The exogenous application of plant hormones and their analogues has been exploited to improve crop performance in the field. Protodioscin is a saponin whose steroidal moiety has some similarities to plant steroidal hormones, brassinosteroids. To test the possibility that protodioscin acts as an agonist or antagonist of brassinosteroids or other plant growth regulators, we compared responses of the weed species Bidens pilosa L. to treatment with protodioscin, brassinosteroids, auxins (IAA) and abscisic acid (ABA). Seeds were germinated and grown in agar containing protodioscin, dioscin, brassinolides, IAA and ABA. Root apex respiratory activity was measured with an oxygen electrode. Malondialdehyde (MDA) and antioxidant enzymes activities were assessed. Protodioscin at 48-240 μm inhibited growth of B. pilosa seedlings. The steroidal hormone 24-epibrassinolide (0.1-5 μm) also inhibited growth of primary roots, but brassicasterol was inactive. IAA at higher concentrations (0.5-10.0 μm) strongly inhibited primary root length and fresh weight of stems. ABA inhibited all parameters of seedling growth and also seed germination. Respiratory activity of primary roots (KCN-sensitive and KCN-insensitive) was activated by protodioscin. IAA and ABA reduced KCN-insensitive respiration. The content of MDA in primary roots increased only after protodioscin treatment. All assayed compounds increased APx and POD activity, with 24-epibrassinolide being most active. The activity of CAT was stimulated by protodioscin and 24-epibrassinolide. The results revealed that protodioscin was toxic to B. pilosa through a mechanism not related to plant growth regulator signalling. Protodioscin caused a disturbance in mitochondrial respiratory activity, which could be related to overproduction of ROS and consequent cell membrane damage.
Collapse
Affiliation(s)
- M S Mito
- Department of Biochemistry, University of Maringá, Maringá, Brazil
| | - A A Silva
- Department of Sciences of Nature, Federal University of Acre, Rio Branco, Brazil
| | - F L Kagami
- Department of Biochemistry, University of Maringá, Maringá, Brazil
| | - J D Almeida
- Department of Biochemistry, University of Maringá, Maringá, Brazil
| | - G C Mantovanelli
- Department of Biochemistry, University of Maringá, Maringá, Brazil
| | - M C Barbosa
- Department of Agronomy, University of Londrina, Londrina, Brazil
| | - K A Kern-Cardoso
- Department of Biochemistry, University of Maringá, Maringá, Brazil
| | | |
Collapse
|
7
|
Mito MS, Castro CVD, Peralta RM, Bracht A. Effects of Ranolazine on Carbohydrate Metabolism in the Isolated Perfused Rat Liver. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ojmc.2014.44007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
8
|
Eler GJ, Santos IS, de Moraes AG, Mito MS, Comar JF, Peralta RM, Bracht A. Kinetics of the transformation of n-propyl gallate and structural analogs in the perfused rat liver. Toxicol Appl Pharmacol 2013; 273:35-46. [DOI: 10.1016/j.taap.2013.08.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 08/08/2013] [Accepted: 08/26/2013] [Indexed: 10/26/2022]
|
9
|
Saling SC, Comar JF, Mito MS, Peralta RM, Bracht A. Actions of juglone on energy metabolism in the rat liver. Toxicol Appl Pharmacol 2011; 257:319-27. [PMID: 21945490 DOI: 10.1016/j.taap.2011.09.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 08/31/2011] [Accepted: 09/06/2011] [Indexed: 12/20/2022]
Abstract
Juglone is a phenolic compound used in popular medicine as a phytotherapic to treat inflammatory and infectious diseases. However, it also acts as an uncoupler of oxidative phosphorylation in isolated liver mitochondria and, thus, may interfere with the hepatic energy metabolism. The purpose of this work was to evaluate the effect of juglone on several metabolic parameters in the isolated perfused rat liver. Juglone, in the concentration range of 5 to 50μM, stimulated glycogenolysis, glycolysis and oxygen uptake. Gluconeogenesis from both lactate and alanine was inhibited with half-maximal effects at the concentrations of 14.9 and 15.7μM, respectively. The overall alanine transformation was increased by juglone, as indicated by the stimulated release of ammonia, urea, l-glutamate, lactate and pyruvate. A great increase (9-fold) in the tissue content of α-ketoglutarate was found, without a similar change in the l-glutamate content. The tissue contents of ATP were decreased, but those of ADP and AMP were increased. Experiments with isolated mitochondria fully confirmed previous notions about the uncoupling action of juglone. It can be concluded that juglone is active on metabolism at relatively low concentrations. In this particular it resembles more closely the classical uncoupler 2,4-dinitrophenol. Ingestion of high doses of juglone, thus, presents the same risks as the ingestion of 2,4-dinitrophenol which comprise excessive compromising of ATP production, hyperthermia and even death. Low doses, i.e., moderate consumption of natural products containing juglone, however, could be beneficial to health if one considers recent reports about the consequences of chronic mild uncoupling.
Collapse
Affiliation(s)
- Simoni Cristina Saling
- Department of Biochemistry, Laboratory of Liver Metabolism, University of Maringá, 87020900 Maringá, Brazil
| | | | | | | | | |
Collapse
|
10
|
Mito MS, Constantin J, de Castro CV, Yamamoto NS, Bracht A. Effects of ranolazine on fatty acid transformation in the isolated perfused rat liver. Mol Cell Biochem 2010; 345:35-44. [PMID: 20680408 DOI: 10.1007/s11010-010-0557-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Accepted: 07/23/2010] [Indexed: 10/19/2022]
Abstract
It has been proposed that in the heart, ranolazine shifts the energy source from fatty acids to glucose oxidation by inhibiting fatty acid oxidation. Up to now no mechanism for this inhibition has been proposed. The purpose of this study was to investigate if ranolazine also affects hepatic fatty acid oxidation, with especial emphasis on cell membrane permeation based on the observations that the compound interacts with biological membranes. The isolated perfused rat liver was used, and [1-(14)C]oleate transport was measured by means of the multiple-indicator dilution technique. Ranolazine inhibited net uptake of [1-(14)C]-oleate by impairing transport of this fatty acid. The compound also diminished the extra oxygen consumption and ketogenesis driven by oleate and the mitochondrial NADH/NAD(+) ratio, but stimulated (14)CO(2) production. These effects were already significant at 20 μM ranolazine. Ranolazine also inhibited both oxygen consumption and ketogenesis driven by endogenous fatty acids in substrate-free perfused livers. In isolated mitochondria ranolazine inhibited acyl-CoA oxidation and β-hydroxybutyrate or α-ketoglutarate oxidation coupled to ADP phosphorylation. It was concluded that ranolazine inhibits fatty acid uptake and oxidation in the liver by at least two mechanisms: inhibition of cell membrane permeation and by an inhibition of the mitochondrial electron transfer via pyridine nucleotides.
Collapse
Affiliation(s)
- Márcio Shigueaki Mito
- Laboratory of Liver Metabolism, Department of Biochemistry, University of Maringá, Maringá, 87020900, Brazil
| | | | | | | | | |
Collapse
|