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Wang X, Wang X, Zhu Y, Chen X. ADME/T-based strategies for paraquat detoxification: Transporters and enzymes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118137. [PMID: 34536650 DOI: 10.1016/j.envpol.2021.118137] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 07/26/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Paraquat (PQ) is a toxic, organic herbicide for which there is no specific antidote. Although banned in some countries, it is still used as an irreplaceable weed killer in others. The lack of understanding of the precise mechanism of its toxicity has hindered the development of treatments for PQ exposure. While toxicity is thought to be related to PQ-induced oxidative stress, antioxidants are limited in their ability to ameliorate the untoward biological responses to this agent. Summarized in this review are data on the absorption, distribution, metabolism, excretion, and toxicity (ADME/T) of PQ, focusing on the essential roles of individual transporters and enzymes in these processes. Based on these findings, strategies are proposed to design and test specific and effective antidotes for the clinical management of PQ poisoning.
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Affiliation(s)
- Xianzhe Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau, China
| | - Xumei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau, China
| | - Yanyan Zhu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau, China
| | - Xiuping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau, China.
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Shipkowski KA, Sanders JM, McDonald JD, Garner CE, Doyle-Eisele M, Wegerski CJ, Waidyanatha S. Comparative disposition of dimethylaminoethanol and choline in rats and mice following oral or intravenous administration. Toxicol Appl Pharmacol 2019; 378:114592. [PMID: 31100288 DOI: 10.1016/j.taap.2019.05.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/15/2019] [Accepted: 05/10/2019] [Indexed: 12/13/2022]
Abstract
Dimethylaminoethanol (DMAE) and its salts have been used to treat numerous disorders in humans and hence safety of its use is a concern. DMAE is a close structural analog of choline, an essential nutrient. Exposure to DMAE may affect choline uptake and synthesis. The current investigation characterizes: 1) the absorption, distribution, metabolism, and excretion (ADME) of DMAE in Wistar Han rats and B6C3F1 mice following a single gavage or intravenous (IV) administration of 10, 100 or 500 mg/kg [14C]DMAE, and 2) the ADME of [14C]choline (160 mg/kg) and the effect on its disposition following pre-treatment with DMAE (100 or 500 mg/kg). In both rats and mice, following gavage administration, DMAE was excreted in urine (16-69%) and as exhaled CO2 (3-22%). The tissue retention was moderate (21-44%); however, the brain concentrations were low and there was no accumulation. Serum choline levels were not elevated following administration of DMAE. The DMAE metabolites in urine were DMAE N-oxide and N,N-dimethylglycine; the carcinogen, N-N-dimethylnitrosamine, was not detected. The pattern of disposition of [14C]choline following gavage administration was similar to that of [14C]DMAE. Prior treatment with DMAE had minimal effects on choline disposition. The pattern of disposition of [14C]DMAE and [14C]choline following IV administration was similar to gavage administration. There were minimal dose-, sex- or species-related effects following gavage or IV administration of [14C]DMAE or [14C]choline. Data from the current study did not support previous reports that: 1) DMAE alters choline uptake and distribution, or 2) that DMAE is converted into choline in vivo.
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Affiliation(s)
- K A Shipkowski
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, United States of America
| | - J M Sanders
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, United States of America
| | - J D McDonald
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, United States of America
| | - C E Garner
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, United States of America
| | - M Doyle-Eisele
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, United States of America
| | - C J Wegerski
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, United States of America
| | - S Waidyanatha
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, United States of America.
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Wu H, Xi H, Lai F, Ma J, Chen W, Liu H. Cellular antioxidant activity and Caco-2 cell uptake characteristics of flavone extracts fromLabisia pumila. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13968] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hui Wu
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Hongru Xi
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Furao Lai
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Juanjuan Ma
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Wenbo Chen
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Huifan Liu
- College of Food Science and Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
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Silva R, Carmo H, Vilas-Boas V, Barbosa DJ, Monteiro M, de Pinho PG, de Lourdes Bastos M, Remião F. Several transport systems contribute to the intestinal uptake of Paraquat, modulating its cytotoxic effects. Toxicol Lett 2015; 232:271-83. [DOI: 10.1016/j.toxlet.2014.10.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 10/09/2014] [Accepted: 10/09/2014] [Indexed: 11/29/2022]
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Silva R, Carmo H, Vilas-Boas V, Pinho PGD, Dinis-Oliveira RJ, Carvalho F, Silva I, Correia-de-Sá P, Bastos MDL, Remião F. Doxorubicin decreases paraquat accumulation and toxicity in Caco-2 cells. Toxicol Lett 2013; 217:34-41. [PMID: 23220037 DOI: 10.1016/j.toxlet.2012.11.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 11/27/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
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Chávez J, Vargas MH, Cruz-Valderrama JE, Montaño LM. Non-quantal release of acetylcholine in guinea-pig airways: role of choline transporter. Exp Physiol 2011; 96:460-7. [DOI: 10.1113/expphysiol.2010.056440] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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In vitro study of P-glycoprotein induction as an antidotal pathway to prevent cytotoxicity in Caco-2 cells. Arch Toxicol 2010; 85:315-26. [PMID: 20857089 DOI: 10.1007/s00204-010-0587-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Accepted: 09/01/2010] [Indexed: 12/20/2022]
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Yuan Z, Wagner L, Poloumienko A, Bakovic M. Identification and expression of a mouse muscle-specific CTL1 gene. Gene 2004; 341:305-12. [PMID: 15474312 DOI: 10.1016/j.gene.2004.07.042] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2004] [Revised: 07/01/2004] [Accepted: 07/19/2004] [Indexed: 10/26/2022]
Abstract
In this study, a mouse gene and cDNA encoding for a novel skeletal muscle-specific choline transporter-like protein 1 (mCTL1) were identified and mCTL1 mRNA and protein expression characterized. The mCTL1 cDNA is 2888-bp long; consisting of a 653-amino-acid open-reading frame, 8-11 putative transmembrane domains, three N-glycosylation sites and seven protein kinase C phosphorylation sites. The mCTL1 gene is localized to chromosome 4B2, at 182 kb in length, and encoded by 17 exons. Although the mCTL1 mRNA was expressed in several mouse tissues such as muscle, brain, heart and testis, the protein analyses of multiple tissues and membrane vesicles reveal that mCTL1 is exclusively expressed in skeletal muscle. Expression of His-tagged mCTL1 in Cos-7 cells produces an increase in saturable choline uptake that is sensitive to a Na(+)-ion gradient, ethanolamine and the Ca(2+)-channel blocker verapamil, and insensitive to low concentrations of hemicholinium-3.
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Affiliation(s)
- Zongfei Yuan
- Department of Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada N1G 2W1.
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Kamath AV, Darling IM, Morris ME. Choline uptake in human intestinal Caco-2 cells is carrier-mediated. J Nutr 2003; 133:2607-11. [PMID: 12888645 DOI: 10.1093/jn/133.8.2607] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The objective of the current investigation was to examine the transport characteristics of choline, an endogenous quaternary ammonium compound, into human intestinal Caco-2 cells; the transport of choline has not been characterized in human intestine. The cellular accumulation of choline was independent of an inwardly directed Na(+) gradient and demonstrated temperature dependence and saturability. Using the initial uptake rates, choline accumulation was best characterized by a Michaelis-Menten equation and a diffusion component with a K(m) and V(max) of 110 +/- 3 micro mol/L and 2800 +/- 250 pmol/(mg protein. 10 min), respectively. Choline uptake was significantly inhibited by an excess of choline itself and by hemicholinium-3, a structural analog of choline. However other hydrophilic organic cations, such as tetraethylammonium (TEA) and N-methylnicotinamide (NMN), did not affect choline uptake in Caco-2 cells. Additionally, two typical p-glycoprotein substrates, daunomycin and verapamil, both inhibited choline accumulation. However the opposite was not true: choline did not inhibit DNM accumulation in Caco-2 cells. These results indicate the presence of a carrier-mediated transport system for choline in Caco-2 cells. The substrate specificity of this carrier is unlike that seen in the rat intestinal epithelium, and the human transport protein is distinct from those for TEA and NMN. P-glycoprotein substrates may inhibit choline uptake through specific or nonspecific interactions with the choline transporter.
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Affiliation(s)
- Amrita V Kamath
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, The State University of New York, Amherst, NY 14260, USA
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