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Samynathan R, Subramanian U, Venkidasamy B, Shariati MA, Chung IM, Thiruvengadam M. S-Allylcysteine (SAC) Exerts Renoprotective Effects via Regulation of TGF-
β1/Smad3 Pathway Mediated Matrix Remodeling in Chronic Renal Failure. Curr Pharm Des 2022; 28:661-670. [DOI: 10.2174/1381612828666220401114301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/03/2021] [Accepted: 04/08/2021] [Indexed: 11/22/2022]
Abstract
Background: S-Allylcysteine (SAC), an organosulfur phytochemical sourced from aged garlic extract,
is well known for its varied biomedical applications, such as anti-oxidant, anti-inflammatory, and detoxification
mechanisms. Despite this, the scientific findings on the defensive impact of SAC against kidney failure
(KF) are still unclear. Therefore, in the current investigation, the animal model of KF was induced by adenine
in Wistar rats, and the animals were divided into four groups as control, KF induction using adenine, SAC treated
KF rats for an experimental duration of 8 weeks.
Methods: KF progression was assessed by various serum and tissue markers, and the results demonstrated that
the renal functions’ markers, KIM-1 (kidney injury molecule-1), cystatin, NGAL (neutrophil gelatinase-associated
lipocalin), were found increased in adenine-treated rats compared to control. In addition, the inflammatory
markers, matrix proteins, and fibrosis signatures explicated by RT-PCR, ELISA demonstrated a profound increase.
On the other hand, rats received SAC mitigated KF considerably (p < 0.001) with restored cellular functions.
Besides, SAC pre-treatment abrogated the cytokines and pro-inflammatory signals (COX-2 and PGE2) in
a dose-dependent manner.
Conclusion: Furthermore, the fibrosis signaling markers mediators, such as SMAD-2,-3 were increased with associated
matrix proteins. Thus, the present study substantiated that SAC possesses a significant renoprotective
effect that might have been demonstrated by the inhibition of the TGF-β1/Smad3 signaling pathway.
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Affiliation(s)
- Ramkumar Samynathan
- Department of Biotechnology, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, Tamil Nadu, India
| | - Umadevi Subramanian
- Translational Research Platform for Veterinary Biologicals, Tamil Nadu Veterinary and Animal Sciences University, Madhavaram Milk
Colony, Chennai 600051, Tamil Nadu, India
| | - Baskar Venkidasamy
- Department of Biotechnology, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, Tamil Nadu, India
| | - Mohammad Ali Shariati
- Department of Technology of Food Products, K.G. Razumovsky Moscow State University of Technologies and Management (The First Cossack University), 73, Zemlyanoy Val St., Moscow, 109004, Russian Federation
| | - Ill-Min Chung
- Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul 05029, Republic of Korea
| | - Muthu Thiruvengadam
- Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul 05029, Republic of Korea
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Gao L, Yuan H, Xu E, Liu J. Toxicology of paraquat and pharmacology of the protective effect of 5-hydroxy-1-methylhydantoin on lung injury caused by paraquat based on metabolomics. Sci Rep 2020; 10:1790. [PMID: 32019966 PMCID: PMC7000692 DOI: 10.1038/s41598-020-58599-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 01/17/2020] [Indexed: 11/28/2022] Open
Abstract
Paraquat (PQ) is a non-selective herbicide and is exceedingly toxic to humans. The mechanism of PQ toxicity is very complex and has not been clearly defined. There is no specific antidote for PQ poisoning. 5-hydroxy-1-methylhydantoin (HMH) is an intrinsic antioxidant and can protect against renal damage caused by PQ. The mechanism of PQ toxicology and the possible effects of HMH on PQ-induced lung injury were determined in this study. It was found that PQ decreased superoxide dismutase (SOD) activity and elevated the level of malondialdehyde (MDA), while HMH elevated SOD activity and decreased the level of MDA. Based on metabolomics, the citrate cycle, glutathione metabolism, taurine and hypotaurine metabolism, regulation of lipolysis in adipocytes, inflammatory mediator regulation of TRP channels, purine and pyrimidine metabolism, aldosterone synthesis and secretion, and phenylalanine metabolism were changed in the PQ group. Compared with the PQ group, the levels of N-acetyl-l-aspartic acid, L-glutamic acid, L-aspartic acid, mesaconic acid, adenosine 5′ monophosphate, methylmalonic acid, cytidine, phosphonoacetic acid, hypotaurine, glutathione (reduced) and cysteinylglycine increased, while the levels of corticosterone, xanthine, citric acid, prostaglandin G2, 4-pyridoxic acid and succinyl proline decreased in the HMH group. These metabolites revealed that HMH can alleviate inflammation caused by PQ and elevate the activity of intrinsic antioxidants. In conclusion, our results revealed PQ toxicology and the pharmacology underlying the protective effect of HMH on lung injury due to PQ. Toxicity caused by PQ results in lipid peroxidation and an increase in reactive oxygen species (ROS), nitric oxide (NO), damage to the biliary system, gastrointestinal system and nervous system, in addition to lungs, kidneys, and the liver. HMH is a good antioxidant and protects against lung injury caused by PQ. In summary, HMH efficiently reduced PQ-induced lung injury in mice.
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Affiliation(s)
- Lina Gao
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China.
| | - Huiya Yuan
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
| | - Enyu Xu
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
| | - Junting Liu
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
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Dos Santos IF, Sheriff S, Amlal S, Ahmed RPH, Thakar CV, Amlal H. Adenine acts in the kidney as a signaling factor and causes salt- and water-losing nephropathy: early mechanism of adenine-induced renal injury. Am J Physiol Renal Physiol 2019; 316:F743-F757. [PMID: 30623725 DOI: 10.1152/ajprenal.00142.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Chronic adenine feeding is extensively used to develop animal models of chronic renal failure with metabolic features resembling those observed in humans. However, the mechanism by which adenine induces renal failure is poorly understood. In this study, we examined the early effects of adenine on water metabolism and salt balance in rats placed in metabolic cages and fed control or adenine-containing diets for 7 days. Molecular and functional studies demonstrated that adenine-fed rats exhibited a significant reduction in food intake, polyuria, polydipsia, decreased urine osmolality, and increased salt wasting. These effects are independent of changes in food intake and result from a coordinated downregulation of water channel aquaporin-2 (AQP2) and salt transporter (Na+-K+-Cl- cotransporter 2; NKCC2) in the collecting duct and medullary thick ascending limb, respectively. As a result, adenine-fed rats exhibited massive volume depletion, as indicated by a significant body weight loss, increased blood urea nitrogen, and increased hematocrit and hemoglobin levels, all of which were significantly corrected with NaCl replacement. Adenine-induced urinary concentrating defect was not corrected by exogenous arginine vasopressin (AVP), and it correlated with reduced cAMP production in vivo and in vitro. In conclusion, adenine acts on renal tubules as a signaling molecule and causes nephrogenic diabetes insipidus with salt wasting, at least, by directly interfering with AVP V2 receptor signaling with subsequent downregulation of NKCC2 and AQP2 in the kidney. The combination of renal fluid loss and decreased food intake with subsequent massive volume depletion likely plays an important role in the development of early prerenal failure that progresses to chronic kidney disease in long-term adenine feeding.
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Affiliation(s)
- Ingrid F Dos Santos
- Department of Internal Medicine, Division of Nephrology and Kidney C.A.R.E, College of Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Sulaiman Sheriff
- Department of Surgery, College of Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Sihame Amlal
- Department of Internal Medicine, Division of Nephrology and Kidney C.A.R.E, College of Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Rafeeq P H Ahmed
- Department of Pathology, College of Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Charuhas V Thakar
- Department of Internal Medicine, Division of Nephrology and Kidney C.A.R.E, College of Medicine, University of Cincinnati , Cincinnati, Ohio
| | - Hassane Amlal
- Department of Internal Medicine, Division of Nephrology and Kidney C.A.R.E, College of Medicine, University of Cincinnati , Cincinnati, Ohio
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Zhong Y, Jin C, Wang X, Li X, Han J, Xue W, Wu P, Peng X, Xia X. Protective effects of apigenin against 3-MCPD-induced renal injury in rat. Chem Biol Interact 2018; 296:9-17. [DOI: 10.1016/j.cbi.2018.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 07/22/2018] [Accepted: 08/10/2018] [Indexed: 12/27/2022]
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Diwan V, Brown L, Gobe GC. Adenine-induced chronic kidney disease in rats. Nephrology (Carlton) 2018; 23:5-11. [PMID: 29030945 DOI: 10.1111/nep.13180] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2017] [Indexed: 12/24/2022]
Abstract
Many animal models have been developed to study the causes and treatments of chronic kidney disease (CKD) in humans, an insidious disease resulting from kidney injury and characterized by persistent functional decline for more than 3 months, with or without evidence of structural deficit. The eventual outcome of CKD may be end-stage kidney disease (ESKD), where patients need dialysis or transplantation to survive. Cardiovascular disease is accelerated in patients with CKD and contributes to increased mortality, with the relationship between CKD and cardiovascular disease being bi-directional. Most animal models do not mimic the complexity of the human disease as many do not develop CKD-associated cardiovascular disease. The adenine diet model of CKD in rodents is an exception. The original adenine diet model produced rapid-onset kidney disease with extensive tubulointerstitial fibrosis, tubular atrophy, crystal formation and marked vessel calcification. Since then, lower adenine intake in rats has been found to induce slowly progressive kidney damage and cardiovascular disease. These chronic adenine diet models allow the characterization of relatively stable kidney and cardiovascular disease, similar to CKD in humans. In addition, interventions for reversal can be tested. Here the key features of the adenine diet model of CKD are noted, along with some limitations of other available models. In summary, the data presented here support the use of chronic low-dose adenine diet in rats as an easy and effective model for understanding human CKD, especially the links with cardiovascular disease, and developing potential therapeutic interventions.
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Affiliation(s)
- Vishal Diwan
- UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Lindsay Brown
- School of Health and Wellbeing, The University of Southern Queensland, Toowoomba, Queensland, Australia
| | - Glenda C Gobe
- UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, Queensland, Australia.,NHMRC Centre for Research Excellence, Centre for Chronic Disease, The University of Queensland, Brisbane, Queensland, Australia
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Florens N, Lemoine S, Pelletier CC, Rabeyrin M, Juillard L, Soulage CO. Adenine Rich Diet Is Not a Surrogate of 5/6 Nephrectomy in Rabbits. Nephron Clin Pract 2017; 135:307-314. [PMID: 28161698 DOI: 10.1159/000454990] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/25/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Animal models are important tools needed to understand the mechanisms underlying the progression of renal disease and to implement new therapeutic approaches. A non-surgical model of chronic kidney disease (CKD) developed by chemical nephrectomy using an adenine-enriched diet has been shown to be a robust model to induce kidney failure in mice and rats. The purpose of this study was to implement an adenine diet to induce CKD in rabbits. METHODS Male New Zealand rabbits were fed for 4 weeks with a diet containing 0.75% (w/w) adenine, and renal function was assessed by measuring plasma urea and creatinine concentrations. The glomerular filtration rate (GFR) was measured using the plasmatic clearance of Iohexol. Kidney histology was performed with haematoxylin erythrosine saffron and Sirius red staining. RESULTS In contrast to what was observed in rodents, adenine diet failed to induce kidney failure in rabbits as is evident in the plasma concentrations of creatinine and urea and the direct measurement of GFR or histopathological studies. CONCLUSION Adenine diet is not a surrogate of subtotal nephrectomy to induce kidney failure in rabbits. Several interspecies differences in metabolism and renal physiology could account for this observation.
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Affiliation(s)
- Nans Florens
- Université Lyon, CarMeN, INSERM U1060, INRA U1397, INSA-Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
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Wang F, Jiang YS, Liu F. The influence of mutant lactobacilli on serum creatinine and urea nitrogen concentrations and renal pathology in 5/6 nephrectomized rats. Ren Fail 2016; 38:1441-1447. [PMID: 27605310 DOI: 10.1080/0886022x.2016.1227617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES To explore the capacity of mutant lactobacilli to remove creatinine (Cr) and urea nitrogen (UN) via the gastrointestinal tract and its effects on renal pathology in the 5/6 nephrectomized rat model of chronic renal failure. METHODS Sixty Sprague-Dawley rats were randomly divided into a Sham group, a Model group, a wide-type Lactobacilli group (L.B group), and a Mutant Lactobacilli group (Mut-L.B group). The rats in the Model, LB and Mut-L.B groups underwent 5/6 nephrectomy. Eight weeks after administration, 24-h urine, orbital blood and digestive secretions were collected to analyze Cr and UN levels. Pathological changes in nephridial tissues were observed by hematoxylin and eosin and Masson trichrome staining, and the expression of TGF-β1 and FN was detected by immunohistochemistry. RESULTS There were no significant differences in urinary Cr and UN levels among the Sham, L.B and Mut-L.B groups (p > .05), while serum and digestive Cr and UN levels were significantly decreased in the Mut-L.B group (p < .01). Furthermore, renal tubular injury and interstitial fibrosis were significantly reduced and TGF-β1 and FN expression was decreased (p < .05) in the Mut-L.B group. CONCLUSION Mutant lactobacilli decreased serum Cr and UN levels, reduced the expression of TGF-β1 and FN in renal tissues and alleviated renal interstitial injury and fibrosis in a rat model of chronic renal failure in a mechanism that may involve decomposition and not just excretion of small molecule toxins in the gastrointestinal tract.
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Affiliation(s)
- Fang Wang
- a Division of Nephrology , Ningbo Medical Center Lihuili Eastern Hospital, Taipei Medical University Ningbo Medical Center , Ningbo , PR China
| | - Yun-Sheng Jiang
- b Division of Nephrology , The Second Xiangya Hospital, Research Institute of Nephrology, Central South University , Changsha , PR China
| | - Fang Liu
- c Division of Health Management Center , Xiangya Hospital, Central South University , Changsha , PR China
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Ma HB, Wang R, Yu KZ, Yu C. Dynamic changes of early-stage aortic lipid deposition in chronic renal failure rats and effects of decorin gene therapy. Exp Ther Med 2015; 9:591-597. [PMID: 25574240 PMCID: PMC4280988 DOI: 10.3892/etm.2014.2106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 09/22/2014] [Indexed: 11/05/2022] Open
Abstract
The aim of the present study was to clarify the association between lipid metabolism and the atherosclerosis in early-stage chronic renal failure at the molecular level and to explore the efficacy of decorin on chronic renal failure. Sprague Dawley rats receiving 5/6 nephrectomy and Sham surgery were divided into control and experimental groups. Sprague Dawley rats receiving 5/6 nephrectomy were divided into control and experimental groups, and the experimental group was further subdivided into rats receiving treatment with fibroblasts (FBs) transfected either with empty vector and with a decorin (DCN) gene. The dynamic levels of triglyceride (TG), total cholesterol (T-Ch) and total phospholipid (T-PL) were detected on the 10th, 30th and 60th days. The body weight, blood lipid levels, renal function and renal tissue were observed after four weeks, and transforming growth factor-βl and protein expression was detected by immunohistochemistry. In total, 4 weeks after treatment, the DCN expression in the renal tissue of rats treated with DCN-transfected FBs was significantly increased compared to that in the control rats. The results showed that the levels of the three lipids in the aortic arches were slightly elevated on the 10th day compared with those in the control group, and the TG level was significantly increased on the 30th day. The levels of T-Ch, TG and T-PL in the aortic arches were significantly elevated on the 60th day. The TG and T-Ch levels in the plasma and aortic tissues of Sprague Dawley rats receiving 5/6 nephrectomy without any treatment and after receiving treatment with FBs transfected with empty vector were significantly increased compared with those in the control group. The increased T-Ch and decreased T-PL levels in the erythrocyte membrane increased the rigidity of the erythrocyte and decreased erythrocyte deformability. In conclusion, highly expressed DCN mitigated renal fibrosis and thus delayed renal failure as well as mitigating the abnormal lipid metabolism of the chronic renal failure.
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Affiliation(s)
- Hong-Bo Ma
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Rong Wang
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Ke-Zhou Yu
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Che Yu
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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Ali BH, Al Za'abi M, Al Shukaili A, Nemmar A. High-mobility group box-1 protein in adenine-induced chronic renal failure and the influence of gum arabic thereon. Physiol Res 2014; 64:147-51. [PMID: 25194125 DOI: 10.33549/physiolres.932759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Pathogenesis of adenine-induced chronic renal failure may involve inflammatory, immunological and/or oxidant mechanisms. Gum arabic (GA) is a complex polysaccharide that acts as an anti-oxidant which can modulate inflammatory and/or immunological processes. Therefore, we tested here the effect of GA treatment (15 % in the drinking water for 4 weeks) in plasma and urine of rats, on a novel cytokine that has been shown to be pro-inflammatory, viz, DNA-binding high-mobility group box-1 protein (HMGB1). Adenine (0.75 % in the feed, 4 weeks) significantly increased indoxyl sulphate, urea and creatinine concentrations in plasma, and significantly decreased the creatinine clearance. GA significantly abated these effects. The concentrations of HMGB1 in urine before the start of the experiment were similar in all four groups. However, 24 h after the last treatment, adenine treatment increased significantly the concentration of HMGB1 when compared with the control. GA treatment did not affect the HMGB1 concentration in urine. Moreover, the concentration of HMGB1 in plasma obtained 24 h after the last treatment in rats treated with adenine was drastically reduced compared with the control group. This may explain its significant rise in urine. In conclusion, HMGB1 can be considered a potentially useful biomarker in adenine induced CRF and its treatment.
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Affiliation(s)
- B H Ali
- Department of Pharmacology and Clinical Pharmacy, College of Medicine and Health Sciences, Sultan Qaboos University, Oman, Department of Physiology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, UAE. ,
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Ienaga K, Sohn M, Naiki M, Jaffa AA. Creatinine metabolite, HMH (5-hydroxy-1-methylhydantoin; NZ-419), modulates bradykinin-induced changes in vascular smooth muscle cells. J Recept Signal Transduct Res 2014; 34:195-200. [DOI: 10.3109/10799893.2013.876039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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11
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Adenine-induced chronic kidney and cardiovascular damage in rats. J Pharmacol Toxicol Methods 2013; 68:197-207. [DOI: 10.1016/j.vascn.2013.05.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Revised: 05/23/2013] [Accepted: 05/24/2013] [Indexed: 11/19/2022]
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Ienaga K, Yokozawa T. Creatinine and HMH (5-hydroxy-1-methylhydantoin, NZ-419) as intrinsic hydroxyl radical scavengers. Drug Discov Ther 2012; 5:162-75. [PMID: 22466296 DOI: 10.5582/ddt.2011.v5.4.162] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Creatinine (Crn) is one of the main intrinsic hydroxyl radical (•OH) scavengers and an ideal one for healthy or normal mammals, although this fact has not yet become widely accepted. Our results from urinary data estimated that ca. 0.4-0.6% of Crn is used daily to scavenge •OH in normal mammals [ca. 50 μmole and ca. 400 pmole of •OH in healthy subjects and normal rats, respectively]. In human subjects, Crn reacts non-enzymatically with •OH to form creatol (CTL: 5-hydroxycreatinine) and demethylcreatinine (DMC) in a one to one ratio, and CTL partially decomposes to methylguanidine (MG). And so, the scavenged mole of •OH by Crn is nearly equal to their molar total sum (CTL + MG + DMC) or 2 × (CTL + MG). The molar ratio of (scavenged •OH)/Crn in healthy subjects and normal rats are 4.4 and 6.0 mmole/mole, respectively, i.e. almost similar, but in patients with chronic kidney disease (CKD) the ratio increases up to ca. 60 mmole/mole in proportion to the severity of CKD. Since the level of Crn might not be enough to scavenge all •OH, and MG starts accumulating as a uremic toxin, Crn is not really the ideal scavenger. 5-Hydroxy-1-methylhydantoin (HMH, NZ-419), a Crn metabolite, is another antioxidant, having •OH scavenging ability, and has been shown to inhibit the progression of CKD in rats in stead of Crn, if sufficient amounts are given orally.
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Affiliation(s)
- K Ienaga
- Institute of Natural Medicine, University of Toyama, Toyama, Japan
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Ienaga K, Park CH, Yokozawa T. Protective effect of an intrinsic antioxidant, HMH (5-hydroxy-1-methylhydantoin; NZ-419), against cellular damage of kidney tubules. ACTA ACUST UNITED AC 2012; 65:559-66. [PMID: 22749566 DOI: 10.1016/j.etp.2012.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 04/19/2012] [Accepted: 05/23/2012] [Indexed: 02/01/2023]
Abstract
HMH (5-hydroxy-1-methylhydantoin; NZ-419) is a mammalian creatinine metabolite and an intrinsic antioxidant. HMH prevents the progression of chronic kidney disease in rats when a sufficient amount is taken orally. We assessed whether intrinsic and higher levels of HMH could protect tubular epithelial cells, LLC-PK(1) cells, against known cellular damage caused by xenobiotics, such as cisplatin and cephaloridine, or by hypoxia/reoxygenation treatment. Both cell damage and peroxidation, monitored as the leakage of lactate dehydrogenase (LDH) and malondialdehyde (MDA), respectively, from cells into the media, were inhibited by HMH in a concentration-dependent manner. The minimum effective concentration of HMH (2.5 μM) seemed to be too low for HMH to only be a direct hydroxyl radical scavenger. Additional antioxidant effect(s) inhibiting reactive oxygen species generation and/or modulating signal transduction pathways were suggested. The possibility that intrinsic HMH could be a protectant for the kidney was indicated. At the same time, for sufficient inhibition, higher concentrations than intrinsic HMH concentrations may be necessary. Patterns of efficacies of HMH on LDH and MDA against different kinds of cellular damage were compared with our reported data on those of corresponding, naturally occurring antioxidants. A common and specific inhibitory mechanism as well as common target(s) in kidney injuries were indicated.
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Affiliation(s)
- Kazuharu Ienaga
- Nippon Zoki Pharmaceutical Co. Ltd., Hiranomachi Nichome, Chuo-ku, Osaka 541-0046, Japan
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Ienaga K, Yokozawa T. Treatment with NZ-419 (5-Hydroxy-1-methylimidazoline-2,4-dione), a Novel Intrinsic Antioxidant, against the Progression of Chronic Kidney Disease at Stages 3 and 4 in Rats. Biol Pharm Bull 2010; 33:809-15. [DOI: 10.1248/bpb.33.809] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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D'Apolito M, Du X, Zong H, Catucci A, Maiuri L, Trivisano T, Pettoello-Mantovani M, Campanozzi A, Raia V, Pessin JE, Brownlee M, Giardino I. Urea-induced ROS generation causes insulin resistance in mice with chronic renal failure. J Clin Invest 2009; 120:203-13. [PMID: 19955654 DOI: 10.1172/jci37672] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Accepted: 10/07/2009] [Indexed: 12/30/2022] Open
Abstract
Although supraphysiological concentrations of urea are known to increase oxidative stress in cultured cells, it is generally thought that the elevated levels of urea in chronic renal failure patients have negligible toxicity. We previously demonstrated that ROS increase intracellular protein modification by O-linked beta-N-acetylglucosamine (O-GlcNAc), and others showed that increased modification of insulin signaling molecules by O-GlcNAc reduces insulin signal transduction. Because both oxidative stress and insulin resistance have been observed in patients with end-stage renal disease, we sought to determine the role of urea in these phenotypes. Treatment of 3T3-L1 adipocytes with urea at disease-relevant concentrations induced ROS production, caused insulin resistance, increased expression of adipokines retinol binding protein 4 (RBP4) and resistin, and increased O-GlcNAc-modified insulin signaling molecules. Investigation of a mouse model of surgically induced renal failure (uremic mice) revealed increased ROS production, modification of insulin signaling molecules by O-GlcNAc, and increased expression of RBP4 and resistin in visceral adipose tissue. Uremic mice also displayed insulin resistance and glucose intolerance, and treatment with an antioxidant SOD/catalase mimetic normalized these defects. The SOD/catalase mimetic treatment also prevented the development of insulin resistance in normal mice after urea infusion. These data suggest that therapeutic targeting of urea-induced ROS may help reduce the high morbidity and mortality caused by end-stage renal disease.
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Affiliation(s)
- Maria D'Apolito
- Institute of Pediatrics, University of Foggia, Viale Pinto 1 O.O.R.R., Foggia, Italy
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