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Sanni O, N'Da DD, Terre'Blanche G. Insight into the mechanism and toxicology of nitrofurantoin: a metabolomics approach. Drug Chem Toxicol 2023:1-10. [PMID: 38008969 DOI: 10.1080/01480545.2023.2285255] [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: 05/04/2023] [Accepted: 11/06/2023] [Indexed: 11/28/2023]
Abstract
Safety and effectiveness are the two ends of the balance in drug development that needs to be evaluated. The biotransformation of drugs within a living organism could potentiate biochemical insults in the tissue and compromise the safety of drugs. Nitrofurantoin (NFT) is a cheap clinical antibiotic with a wide array of activities against gram-positive and gram-negative organisms. The NFT scaffold has been utilized to develop other derivates or analogues in the quest to repurpose drugs against other infectious diseases. Several techniques were developed over the years to study the mechanism of NFT metabolism and toxicity, such as voltammetry, chromatographic analysis, protein precipitation, liquid-liquid extraction, etc. Due to limitations in these methods, the mechanism of NFT biotransformation in the cell is poorly understood. Metabolomics has been adopted in drug metabolism to understand the mechanism of drug toxicity and could provide a solution to overcome the limitations of current techniques to determine mechanisms of toxicity. Unfortunately, little or no information regarding the metabolomics approach in NFT metabolism and toxicity is available. Hence, this review highlights the metabolomic techniques that can be adopted in NFT metabolism and toxicological studies to encourage the research community to widely adopt and utilize metabolomics in understanding NFT's metabolism and toxicity.
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Affiliation(s)
- Olakunle Sanni
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen), School of Health Sciences. North-West University (NWU), Potchefstroom, South Africa
| | - David D N'Da
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen), School of Health Sciences. North-West University (NWU), Potchefstroom, South Africa
| | - Gisella Terre'Blanche
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen), School of Health Sciences. North-West University (NWU), Potchefstroom, South Africa
- Pharmaceutical Chemistry, School of Pharmacy, North-West University (NWU), Potchefstroom, South Africa
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Bai Y, Jiang LP, Liu XF, Wang D, Yang G, Geng CY, Li Q, Zhong LF, Sun Q, Chen M. The role of oxidative stress in citreoviridin-induced DNA damage in human liver-derived HepG2 cells. ENVIRONMENTAL TOXICOLOGY 2015; 30:530-537. [PMID: 24318808 DOI: 10.1002/tox.21929] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/13/2013] [Accepted: 11/20/2013] [Indexed: 06/02/2023]
Abstract
We hypothesize that citreoviridin (CIT) induces DNA damage in human liver-derived HepG2 cells through an oxidative stress mechanism and that N-acetyl-l-cysteine (NAC) protects against CIT-induced DNA damage in HepG2 cells. CIT-induced DNA damage in HepG2 cells was evaluated by alkaline single-cell gel electrophoresis assay. To elucidate the genotoxicity mechanisms, the level of oxidative DNA damage was tested by immunoperoxidase staining for 8-hydroxydeoxyguanosine (8-OHdG); the intracellular generation of reactive oxygen species (ROS) and reduced glutathione (GSH) were examined; mitochondrial membrane potential and lysosomal membranes' permeability were detected; furthermore, protective effects of NAC on CIT-induced ROS formation and CIT-induced DNA damage were evaluated in HepG2 cells. A significant dose-dependent increment in DNA migration was observed at tested concentrations (2.50-10.00 µM) of CIT. The levels of ROS, 8-OHdG formation were increased by CIT, and significant depletion of GSH in HepG2 cells was induced by CIT. Destabilization of lysosome and mitochondria was also observed in cells treated with CIT. In addition, NAC significantly decreased CIT-induced ROS formation and CIT-induced DNA damage in HepG2 cells. The data indicate that CIT induces DNA damage in HepG2 cells, most likely through oxidative stress mechanisms; that NAC protects against DNA damage induced by CIT in HepG2 cells; and that depolarization of mitochondria and lysosomal protease leakage may play a role in CIT-induced DNA damage in HepG2 cells.
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Affiliation(s)
- Yuntao Bai
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University, Columbus, Ohio, USA; Department of Food Nutrition and Safety, Dalian Medical University, No. 9, West Segment of South Lvshun Road, Dalian, 116044, Liaoning, China
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Kovacic P, Somanathan R. Nitroaromatic compounds: Environmental toxicity, carcinogenicity, mutagenicity, therapy and mechanism. J Appl Toxicol 2014; 34:810-24. [PMID: 24532466 DOI: 10.1002/jat.2980] [Citation(s) in RCA: 226] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022]
Abstract
Vehicle pollution is an increasing problem in the industrial world. Aromatic nitro compounds comprise a significant portion of the threat. In this review, the class includes nitro derivatives of benzene, biphenyls, naphthalenes, benzanthrone and polycyclic aromatic hydrocarbons, plus nitroheteroaromatic compounds. The numerous toxic manifestations are discussed. An appreciable number of drugs incorporate the nitroaromatic structure. The mechanistic aspects of both toxicity and therapy are addressed in the context of a unifying mechanism involving electron transfer, reactive oxygen species, oxidative stress and antioxidants.
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Affiliation(s)
- Peter Kovacic
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA, USA
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Shahraki J, Motallebi A, Pourahmad J. Oxidative mechanisms of fish hepatocyte toxicity by the harmful dinoflagellate Cochlodinium polykrikoides. MARINE ENVIRONMENTAL RESEARCH 2013; 87-88:52-60. [PMID: 23611426 DOI: 10.1016/j.marenvres.2013.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 03/21/2013] [Accepted: 03/22/2013] [Indexed: 06/02/2023]
Abstract
Harmful Algal Blooms caused by the marine ichthyotoxic dinoflagellate Cochlodinium polykrikoides are responsible for mass mortalities of wild and farmed fish worldwide. In this research, we investigated the cytotoxic mechanisms of aqueous extract of C. polykrikoides on isolated Rainbow trout (Oncorhynchus mykiss) liver hepatocytes. Algal extract exposure with isolated trout hepatocytes caused hepatocyte membrane lysis, reactive oxygen species (ROS) formation, glutathione depletion, lysosomal membrane rupture, collapse of mitochondrial membrane potential, ATP depletion and increase in ADP/ATP ratio, cytochrome C release into the hepatocyte cytosol, and activation of caspases cascade. Anti-oxidants, free radical scavengers, mitochondrial permeability transition (MPT) pore sealing agents, microsomal oxidases inhibitors, ATP generators and lysosomotropic agents protected fish hepatocytes against C. polykrikoides. Fish hepatocyte toxicity was also associated with mitochondrial and lysosomal membrane injury. These events caused cytochrome C release from the mitochondrial intra-membrane space into cytosol. The cytochrome C release could trigger activation of caspase-3 and apoptosis.
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Affiliation(s)
- Jafar Shahraki
- Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, P.O. Box 14155-6153, Iran
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Nakagawa Y, Suzuki T, Ishii H, Nakae D, Ogata A. Cytotoxic effects of hydroxylated fullerenes on isolated rat hepatocytes via mitochondrial dysfunction. Arch Toxicol 2011; 85:1429-40. [PMID: 21365311 DOI: 10.1007/s00204-011-0688-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Accepted: 02/17/2011] [Indexed: 12/25/2022]
Abstract
The cytotoxic effects of hydroxylated fullerenes, also termed fullerenols or fullerols [C(60)(OH)( n )], which are known nanomaterials and water-soluble fullerene derivatives, were studied in freshly isolated rat hepatocytes. The exposure of hepatocytes to C(60)(OH)(24) caused not only concentration (0-0.25 mM)- and time (0-3 h)-dependent cell death accompanied by the formation of cell blebs, loss of cellular ATP, reduced glutathione (GSH), and protein thiol levels, but also the accumulation of glutathione disulfide and malondialdehyde, indicating lipid peroxidation. Of the other analogues examined, the cytotoxic effects of C(60)(OH)(12) and fullerene C(60) at a concentration of 0.125 mM were less than those of C(60)(OH)(24). The loss of mitochondrial membrane potential and generation of oxygen radical species in hepatocytes incubated with C(60)(OH)(24) were greater than those with C(60)(OH)(12) and fullerene C(60). In the oxygen consumption of mitochondria isolated from rat liver, the ratios of state-3/state-4 respiration were more markedly decreased by C(60)(OH)(24) and C(60)(OH)(12) compared with C(60). In addition, C(60)(OH)(24) and C(60)(OH)(12) resulted in the induction of the mitochondrial permeability transition (MPT), and the effects of C(60)(OH)(12) were less than those of C(60)(OH)(24). Taken collectively, these results indicate that (a) mitochondria are target organelles for fullerenols, which elicit cytotoxicity through mitochondrial failure related to the induction of the MPT, mitochondrial depolarization, and inhibition of ATP synthesis in the early stage and subsequently oxidation of GSH and protein thiols, and lipid peroxidation through oxidative stress at a later stage; and (b) the toxic effects of fullerenols may depend on the number of hydroxyl groups participating in fullerene in rat hepatocytes.
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Affiliation(s)
- Yoshio Nakagawa
- Division of Pharmacology, Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunin-cho, Shinjuku-ku, Tokyo, Japan.
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Pourahmad J, Hosseini MJ, Eskandari MR, Shekarabi SM, Daraei B. Mitochondrial/lysosomal toxic cross-talk plays a key role in cisplatin nephrotoxicity. Xenobiotica 2010; 40:763-71. [DOI: 10.3109/00498254.2010.512093] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Biological reactive intermediates that mediate dacarbazine cytotoxicity. Cancer Chemother Pharmacol 2009; 65:89-96. [DOI: 10.1007/s00280-009-1007-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Accepted: 04/08/2009] [Indexed: 10/20/2022]
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Wang Y, Gray JP, Mishin V, Heck DE, Laskin DL, Laskin JD. Role of cytochrome P450 reductase in nitrofurantoin-induced redox cycling and cytotoxicity. Free Radic Biol Med 2008; 44:1169-79. [PMID: 18206659 PMCID: PMC5793909 DOI: 10.1016/j.freeradbiomed.2007.12.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2007] [Revised: 11/15/2007] [Accepted: 12/10/2007] [Indexed: 11/30/2022]
Abstract
The one-electron reduction of redox-active chemotherapeutic agents generates highly toxic radical anions and reactive oxygen intermediates (ROI). A major enzyme catalyzing this process is cytochrome P450 reductase. Because many tumor cells highly express this enzyme, redox cycling of chemotherapeutic agents in these cells may confer selective antitumor activity. Nitrofurantoin is a commonly used redox-active antibiotic that possesses antitumor activity. In the present studies we determined whether nitrofurantoin redox cycling is correlated with cytochrome P450 reductase activity and cytotoxicity in a variety of cell lines. Recombinant cytochrome P450 reductase was found to support redox cycling of nitrofurantoin and to generate superoxide anion, hydrogen peroxide, and, in the presence of redox-active iron, hydroxyl radicals. This activity was NADPH dependent and inhibitable by diphenyleneiodonium, indicating a requirement for the flavin cofactors in the reductase. Nitrofurantoin-induced redox cycling was next analyzed in different cell lines varying in cytochrome P450 reductase activity including Chinese hamster ovary cells (CHO-OR) constructed to overexpress the enzyme. Nitrofurantoin-induced hydrogen peroxide production was 16-fold greater in lysates from CHO-OR cells than from control CHO cells. A strong correlation between cytochrome P450 reductase activity and nitrofurantoin-induced redox cycling among the cell lines was found. Unexpectedly, no correlation between nitrofurantoin-induced ROI production and cytotoxicity was observed. These data indicate that nitrofurantoin-induced redox cycling and subsequent generation of ROI are not sufficient to mediate cytotoxicity and that cytochrome P450 reductase is not a determinant of sensitivity to redox-active chemotherapeutic agents.
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Affiliation(s)
- Yun Wang
- Department of Environmental and Occupational Medicine, UMDNJ-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
| | - Joshua P. Gray
- Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
| | - Vladimir Mishin
- Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
| | - Diane E. Heck
- Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
| | - Debra L. Laskin
- Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
| | - Jeffrey D. Laskin
- Department of Environmental and Occupational Medicine, UMDNJ-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
- Corresponding author. Fax: +1 732 445 0119. (J.D. Laskin)
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Pourahmad J, O’Brien PJ, Chan K, Shakouri A. Tetramethylphenylenediamine-induced hepatocyte cytotoxicity caused by lysosomal labilisation and redox cycling with oxygen activation. Chem Biol Interact 2008; 172:39-47. [DOI: 10.1016/j.cbi.2007.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Revised: 12/04/2007] [Accepted: 12/05/2007] [Indexed: 11/25/2022]
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O'Brien PJ, Chan K, Silber PM. Human and animal hepatocytes in vitro with extrapolation in vivo. Chem Biol Interact 2005; 150:97-114. [PMID: 15522264 DOI: 10.1016/j.cbi.2004.09.003] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Human and animal hepatocytes are now being used as an in vitro technique to aid drug discovery by predicting the in vivo metabolic pathways of drugs or new chemical entities (NCEs), identifying drug-metabolizing enzymes and predicting their in vivo induction. Because of the difficulty of establishing whether the cytotoxic susceptibility of human hepatocytes to xenobiotics/drugs in vitro could be used to predict in vivo human hepatotoxicity, a comparison of the susceptibility of the hepatocytes of human and animal models to six chemical classes of drugs/xenobiotics in vitro have been related to their in vivo hepatotoxicity and the corresponding activity of their metabolizing enzymes. This study showed that the cytotoxic effectiveness of 16 halobenzenes towards rat hepatocytes in vitro using higher doses and short incubation times correlated well with rat hepatotoxic effectiveness in vivo with lower doses/longer times. The hepatic/hepatocyte xenobiotic metabolizing enzyme activities of various animal species and human have been reviewed for use by veterinarians and research scientists. Where possible, recommendations have been made regarding which animal hepatocyte model is most applicable for modeling the susceptibility to xenobiotic induced hepatotoxicity of those humans with slow versus rapid metabolizing enzyme polymorphisms. These recommendations are based on the best human fit for animal drug/xenobiotic metabolizing enzymes in terms of activity, kinetics and substrate/inhibitor specificity. The use of human hepatocytes from slow versus rapid metabolizing individuals for drug metabolism/cytotoxicity studies; and the research use of freshly isolated rat hepatocytes and "Accelerated Cytotoxicity Mechanism Screening" (ACMS) techniques for identifying drug/xenobiotic reactive metabolites are also described. Using these techniques the molecular hepatocytotoxic mechanisms found in vitro for seven classes of xenobiotics/drugs were found to be similar to the rat hepatotoxic mechanisms reported in vivo.
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Affiliation(s)
- Peter J O'Brien
- Graduate Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto, 19 Russell St., Toronto, Ont., Canada M5S 2S2.
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Pourahmad J, O'Brien PJ, Jokar F, Daraei B. Carcinogenic metal induced sites of reactive oxygen species formation in hepatocytes. Toxicol In Vitro 2003; 17:803-10. [PMID: 14599481 DOI: 10.1016/s0887-2333(03)00123-1] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Severe chronic liver disease results from the hepatic accumulation of copper nickel, cobalt or iron in humans and on the other hand cadmium, dichromate and arsenic may induce lung or kidney cancer. Acute or chronic CdCl2, HgCl2 or dichromate administration induces hepatic and nephrotoxicity in rodents. Oxidative stress is often cited as a possible cause but has not yet been measured. For the first time we have measured the reactive oxygen species (ROS) formation induced when cells are incubated with metals and determined its source. Hepatocytes incubated with 2',7'-dichlorofluorescin diacetate resulted in its rapid uptake and deacetylation by intracellular esterases to form 2',7'-dichlorofluorescin. A marked increase in ROS formation occurred with LD50 concentrations of cadmium [Cd(II)], Hg(II) or arsenite [As(III)] which was released by proton ionophores that uncouple oxidative phosphorylation. Uncouplers or oxidative phosphorylation also inhibited ROS formation induced by these metals, which suggests that mitochondria are major contributors to endogenous ROS formation. Glycolytic substrates also inhibited Cd(II)/Hg(II)/As(III)-induced ROS formation and confirms that mitochondria are the site of ROS formation. By contrast ROS formation by LD50 concentrations of Cu(II), Ni(II), Co(II) or dichromate [Cr(VI)] were not affected by uncouplers or glycolytic substrates. However they were inhibited by lysosomotropic agents or endogenous inhibitors [in contrast to Hg(II), Cd(II) or As(III)]. Furthermore Cu(II), Ni(II), Co(II) or Cr(VI) accumulated in the lysosomes and the ROS formed caused a loss of lysosomal membrane integrity. The release of lysosomal proteases and phospholipases also contributed to hepatocyte cytotoxicity. ROS formation and cytotoxicity induced by added H2O2 or generated by the intracellular redox cycling of nitrofurantoin was also inhibited by lysosomotropic agents and ferric chelators suggesting that lysosomal Fe(II) contributes to H2O2-induced cytotoxicity. In conclusion, lysosomes are sites of cytotoxic ROS formation with redox transition metals (CuII, CrVI, NiII, CoII) whereas mitochondria are the ROS sites for non-redox or poor redox cycling transition metals (CdII, HgII, AsIII).
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Affiliation(s)
- Jalal Pourahmad
- Faculty of Pharmacy, Shaheed Beheshti University of Medical Sciences, Tehran, PO Box 14155-6153, Iran.
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Siraki AG, Pourahmad J, Chan TS, Khan S, O'Brien PJ. Endogenous and endobiotic induced reactive oxygen species formation by isolated hepatocytes. Free Radic Biol Med 2002; 32:2-10. [PMID: 11755311 DOI: 10.1016/s0891-5849(01)00764-x] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The rat hepatocyte catalyzed oxidation of 2',7'-dichlorofluorescin to form the fluorescent 2,7'-dichlorofluorescein was used to measure endogenous and xenobiotic-induced reactive oxygen species (ROS) formation by intact isolated rat hepatocytes. Various oxidase substrates and inhibitors were then used to identify the intracellular oxidases responsible. Endogenous ROS formation was markedly increased in catalase-inhibited or GSH-depleted hepatocytes, and was inhibited by ROS scavengers or desferoxamine. Endogenous ROS formation was also inhibited by cytochrome P450 inhibitors, but was not affected by oxypurinol, a xanthine oxidase inhibitor, or phenelzine, a monoamine oxidase inhibitor. Mitochondrial respiratory chain inhibitors or hypoxia, on the other hand, markedly increased ROS formation before cytotoxicity ensued. Furthermore, uncouplers of oxidative phosphorylation inhibited endogenous ROS formation. This suggests endogenous ROS formation can largely be attributed to oxygen reduction by reduced mitochondrial electron transport components and reduced cytochrome P450 isozymes. Addition of monoamine oxidase substrates increased antimycin A-resistant respiration and ROS formation before cytotoxicity ensued. Addition of peroxisomal substrates also increased antimycin A-resistant respiration but they were less effective at inducing ROS formation and were not cytotoxic. However, peroxisomal substrates readily induced ROS formation and were cytotoxic towards catalase-inhibited hepatocytes, which suggests that peroxisomal catalase removes endogenous H(2)O(2) formed in the peroxisomes. Hepatocyte catalyzed dichlorofluorescin oxidation induced by oxidase substrates, e.g., benzylamine, was correlated with the cytotoxicity induced in catalase-inhibited hepatocytes.
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Affiliation(s)
- Arno G Siraki
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto, 19 Russell Street, Toronto, Ontario, Canada M5S 2S2
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