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Long-term treatment with chaethomellic acid A reduces glomerulosclerosis and arteriolosclerosis in a rat model of chronic kidney disease. Biomed Pharmacother 2017; 96:489-496. [PMID: 29032332 DOI: 10.1016/j.biopha.2017.09.137] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 09/26/2017] [Accepted: 09/26/2017] [Indexed: 11/21/2022] Open
Abstract
The high prevalence of end-stage renal disease emphasizes the failure to provide therapies to effectively prevent and/or reverse renal fibrosis. Therefore, the aim of this study was to evaluate the effect of long-term treatment with chaethomellic acid A (CAA), which selectively blocks Ha-Ras farnesylation, on renal mass reduction-induced renal fibrosis. Male Wistar rats were sham-operated (SO) or subjected to 5/6 renal mass reduction (RMR). One week after surgery, rats were placed in four experimental groups: SO:SO rats without treatment (n=13); SO+CAA: SO rats treated with CAA (n=13); RMR:RMR rats without treatment (n=14); and RMR+CAA:RMR rats treated with CAA (n=13). CAA was intraperitoneally administered in a dose of 0.23μg/kg three times a week for six months. Renal fibrosis was evaluated by two-dimensional ultrasonography and histopathological analysis. The kidneys of the RMR animals treated with CAA showed a significantly decrease in the medullary echogenicity (p<0.05) compared with the RMR rats that received no treatment. Glomerulosclerosis and arteriolosclerosis scores were significantly lower (p<0.001) in the RMR+CAA group when compared with the RMR group. There were no significant differences in interstitial fibrosis, interstitial inflammation and tubular dilatation scores between the RMR+CAA and RMR groups. These data suggest that CAA can be a potential future drug to attenuate the progression of chronic kidney disease.
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Ergin B, Heger M, Kandil A, Demirci-Tansel C, Ince C. Mycophenolate mofetil improves renal haemodynamics, microvascular oxygenation, and inflammation in a rat model of supra-renal aortic clamping-mediated renal ischaemia reperfusion injury. Clin Exp Pharmacol Physiol 2017; 44:294-304. [PMID: 27778375 DOI: 10.1111/1440-1681.12687] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 10/18/2016] [Accepted: 10/20/2016] [Indexed: 11/26/2022]
Abstract
Ischaemia/reperfusion (I/R) is one of the main causes of acute kidney injury (AKI), which is characterized by sterile inflammation and oxidative stress. Immune cell activation can provoke overproduction of inflammatory mediators and reactive oxygen species (ROS), leading to perturbation of the microcirculation and tissue oxygenation associated with local and remote tissue injury. This study investigated whether the clinically employed immunosuppressant mycophenolate mofetil (MMF) was able to reduce I/R-induced renal oxygenation defects and oxidative stress by preventing sterile inflammation. Rats were divided into three groups (n=6/group): (1) a sham-operated control group; (2) a group subjected to renal I/R alone (I/R); and (3) a group subjected to I/R and MMF treatment (20 mg/kg prior to I/R) (I/R+MMF). Ischaemia was induced by a vascular occluder placed on the abdominal aorta for 30 minutes, followed by 120 minutes of reperfusion. Renal I/R deteriorated renal oxygenation (P<.001) and oxygen delivery (P<.01), reduced creatinine clearance (P<.01) and tubular sodium reabsorption (P<.001), and increased iNOS, renal tissue injury markers (P<.001), and IL-6 (P<.001). Oral MMF administration prior to insult restored renal cortical oxygenation (P<.05) and iNOS, renal injury markers, and inflammation parameters (P<.001) to near-baseline levels without affecting renal function. MMF exerted a prophylactic effect on renal microvascular oxygenation and abrogated tissue inflammation and renal injury following lower body I/R-induced AKI. These findings may have clinical implications during major vascular or renal transplant surgery.
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Affiliation(s)
- Bulent Ergin
- Department of Translational Physiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Michal Heger
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Asli Kandil
- Department of Biology, Faculty of Science, University of Istanbul, Istanbul, Turkey
| | - Cihan Demirci-Tansel
- Department of Biology, Faculty of Science, University of Istanbul, Istanbul, Turkey
| | - Can Ince
- Department of Translational Physiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
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The Effects of Long-Term Chaetomellic Acid A Administration on Renal Function and Oxidative Stress in a Rat Model of Renal Mass Reduction. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5125980. [PMID: 28326323 PMCID: PMC5343227 DOI: 10.1155/2017/5125980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 12/19/2022]
Abstract
Purpose. This study aimed to evaluate the effect of chronic treatment with chaetomellic acid A (CAA) on oxidative stress and renal function in a model of renal mass reduction. Methods. Male Wistar rats were subjected to 5/6 nephrectomy (RMR) or sham-operated (SO). One week after surgery, rats have been divided into four experimental groups: RMR: RMR rats without treatment (n = 14); RMR + CAA: RMR rats treated with CAA (n = 13); SO: SO rats without treatment (n = 13); and SO + CAA: SO rats treated with CAA (n = 13). CAA was intraperitoneally administered in a dose of 0.23 µg/Kg three times a week for six months. Results. RMR was accompanied by a significant reduction in catalase and glutathione reductase (GR) activity (p < 0.05) and a decrease in reduced glutathione (GSH)/oxidized glutathione (GSSG) ratio. CAA administration significantly increased catalase and GR activity (p < 0.05) and increased GSH/GSSG ratio, but no significant difference between the treated and nontreated groups was found in this ratio. No significant differences were found between the RMR groups in any of the parameters of renal function. However, CAA administration slightly improves some parameters of renal function. Conclusions. These data suggest that CAA could attenuate 5/6 RMR-induced oxidative stress.
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Dall'Agnol DJR, Hauschildt AT, Lima MB, Corá LA, Teixeira MCB, Américo MF. Effects of immunosuppressive drugs on gastrointestinal transit of rats: effects of tacrolimus, cyclosporine, and prednisone. Transplant Proc 2015; 46:1872-4. [PMID: 25131057 DOI: 10.1016/j.transproceed.2014.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Triple immunosuppressive therapy after organ transplantation may cause several gastrointestinal disturbances. It is difficult to identify which drug causes more complications, requiring an appropriate animal model. The aim was to compare the gastrointestinal transit in immunosuppressed rats under triple immunosuppressive therapy. Male rats were immunosuppressed by gavage during 14 days with tacrolimus (n = 10), cyclosporine (n = 12), and prednisone (n = 9). Animals received a magnetic pellet before (control) and after treatment that was monitored at predetermined intervals by AC biosusceptometry, a noninvasive and radiation-free technique. The following parameters were measured: creatinine serum, mean time of gastric emptying (MGET), mean time to reach cecum (MCAT), and mean transit time through small bowel (MSBTT). The differences were analyzed by ANOVA (Tukey). Our results showed that MGET of animals treated with prednisone, cyclosporine, and tacrolimus were reduced compared with control subjects (P < .03, P < .009, and P < .002, respectively). There was no difference in MCAT, whereas MSBTT was longer for tacrolimus and prednisone compared with control subjects (P < .004 and P < .004, respectively). Also, prednisone and tacrolimus presented a reduced MGET (P < .05 and P < .01, respectively) compared with cyclosporine. Our data showed a low serum creatinine level and no difference among groups regarding renal function. In summary, cyclosporine has less effect on the gastrointestinal transit; however, all of these drugs should be carefully prescribed to prevent gastrointestinal symptoms and improve quality of life after transplantation.
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Affiliation(s)
- D J R Dall'Agnol
- Universidade Federal de Mato Grosso-UFMT, Barra do Garças/MT, Brazil
| | - A T Hauschildt
- Universidade Federal de Mato Grosso-UFMT, Barra do Garças/MT, Brazil
| | - M B Lima
- Universidade Federal de Mato Grosso-UFMT, Barra do Garças/MT, Brazil
| | - L A Corá
- Universidade Estadual de Ciências da Saúde de Alagoas-UNCISAL, Maceió/AL, Brazil.
| | - M C B Teixeira
- Universidade Estadual de Ciências da Saúde de Alagoas-UNCISAL, Maceió/AL, Brazil
| | - M F Américo
- Universidade Federal de Mato Grosso-UFMT, Barra do Garças/MT, Brazil
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Decuypere JP, Ceulemans LJ, Agostinis P, Monbaliu D, Naesens M, Pirenne J, Jochmans I. Autophagy and the Kidney: Implications for Ischemia-Reperfusion Injury and Therapy. Am J Kidney Dis 2015; 66:699-709. [PMID: 26169721 DOI: 10.1053/j.ajkd.2015.05.021] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 05/21/2015] [Indexed: 11/11/2022]
Abstract
Autophagy, an evolutionary conserved intracellular lysosome-dependent catabolic process, is an important mechanism for cellular homeostasis and survival during pathologic stress conditions in the kidney, such as ischemia-reperfusion injury (IRI). However, stimulation of autophagy has been described to both improve and exacerbate IRI in the kidney. We summarize the current understanding of autophagy in renal IRI and discuss possible reasons for these contradictory findings. Furthermore, we hypothesize that autophagy plays a dual role in renal IRI, having both protective and detrimental properties, depending on the duration of the ischemic period and the phase of the IRI process. Finally, we discuss the influence of currently used diuretics and immunosuppressive drugs on autophagy, underscoring the need to clarify the puzzling role of autophagy in renal IRI.
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Affiliation(s)
- Jean-Paul Decuypere
- Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation, KU Leuven, University of Leuven, Leuven, Belgium; Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Laurens J Ceulemans
- Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation, KU Leuven, University of Leuven, Leuven, Belgium; Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Patrizia Agostinis
- Department of Cellular and Molecular Medicine, Laboratory of Cell Death Research and Therapy, Leuven, Belgium
| | - Diethard Monbaliu
- Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation, KU Leuven, University of Leuven, Leuven, Belgium; Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Maarten Naesens
- Department of Microbiology and Immunology, Laboratory of Nephrology, KU Leuven, University of Leuven, Leuven, Belgium; Department of Nephrology, University Hospitals Leuven, Leuven, Belgium
| | - Jacques Pirenne
- Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation, KU Leuven, University of Leuven, Leuven, Belgium; Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Ina Jochmans
- Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation, KU Leuven, University of Leuven, Leuven, Belgium; Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
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Hammad FT, Al-Salam S, Lubbad L. Does aliskiren protect the kidney following ischemia reperfusion injury? Physiol Res 2013; 62:681-90. [PMID: 23869885 DOI: 10.33549/physiolres.932485] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The effect of blocking the first and rate-limiting step in renin-angiotensin cascade on the renal function in ischemia reperfusion injury has not been previously investigated. We investigated the effect of aliskiren, the first approved direct oral renin inhibitor, on the alterations in renal functional parameters in this condition. Wistar rats underwent left renal ischemia for 40 min. Group-1 received normal saline whereas Group-2 received aliskiren (30 mg/kg/day) by gavage for 6 days commencing one day before IRI. The hemodynamic and tubular functions and gene expression of neutrophil gelatinase-associated lipocalin (NGAL) and plasminogen activating inhibitor (PAI-1) in the right and left kidneys were measured five days following the IRI. Comparing Group-1 and Group-2, the left renal blood flow was significantly higher in Group-2 (1.28+/-0.36 vs. 0.39+/-0.05, P=0.007). Left kidney glomerular filtration rate was also higher in Group-2 but did not reach statistical significance (0.18+/-0.05 vs. 0.10+/-0.02, P=0.07). The left renal FE(Na) was significantly lower in Group-2 (29.9+/-6.4 vs. 49.7+/-7.8, P=0.03). Aliskiren also caused a significant decrease in the gene expression of both NGAL and PAI-1 in the left ischemic kidney. In conclusions, the administration of aliskiren before and after IRI appears to have ameliorated the IRI effect on the total renal artery blood flow, fractional excretion of sodium and gene expression of both NGAL and PAI-1 indicating a renoprotective effects in IRI.
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Affiliation(s)
- F T Hammad
- Department of Surgery, College of Medicine and Health Sciences, Al Ain, United Arab Emirates.
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Bellesia F, Choi SR, Felluga F, Fiscaletti G, Ghelfi F, Menziani MC, Parsons AF, Poulter CD, Roncaglia F, Sabbatini M, Spinelli D. Novel route to chaetomellic acid A and analogues: serendipitous discovery of a more competent FTase inhibitor. Bioorg Med Chem 2013; 21:348-58. [PMID: 23182215 PMCID: PMC3761967 DOI: 10.1016/j.bmc.2012.10.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/28/2012] [Accepted: 10/02/2012] [Indexed: 10/27/2022]
Abstract
A new practical route to chaetomellic acid A (ACA), based on the copper catalysed radical cyclization (RC) of (Z)-3-(2,2-dichloropropanoyl)-2-pentadecylidene-1,3-thiazinane, is described. Remarkably, the process entailed: (i) a one-pot preparation of the intermediate N-α-perchloroacyl-2-(Z)-alkyliden-1,3-thiazinanes starting from N-(3-hydroxypropyl)palmitamide, (ii) a two step smooth transformation of the RC products into ACA and (iii) only one intermediate chromatographic purification step. The method offers a versatile approach to the preparation of ACA analogues, through the synthesis of an intermediate maleic anhydride with a vinylic group at the end of the aliphatic tail, a function that can be transformed through a thiol-ene coupling. Serendipitously, the disodium salt of 2-(9-(butylthio)nonyl)-3-methylmaleic acid, that we prepared as a representative sulfurated ACA analogue, was a more competent FTase inhibitor than ACA. This behaviour was analysed by a molecular docking study.
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Affiliation(s)
- Franco Bellesia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena, Via Campi 183, I-40125 Modena, Italia
| | - Seoung-ryoung Choi
- Department of Chemistry, University of Utah, 315 South 1400 East RM 2020, Salt Lake City, UT 84112, USA
| | - Fulvia Felluga
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, Via L. Giorgeri 1, I-34127 Trieste, Italia
| | - Giuliano Fiscaletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena, Via Campi 183, I-40125 Modena, Italia
| | - Franco Ghelfi
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena, Via Campi 183, I-40125 Modena, Italia
| | - Maria Cristina Menziani
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena, Via Campi 183, I-40125 Modena, Italia
| | - Andrew F. Parsons
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - C. Dale Poulter
- Department of Chemistry, University of Utah, 315 South 1400 East RM 2020, Salt Lake City, UT 84112, USA
| | - Fabrizio Roncaglia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena, Via Campi 183, I-40125 Modena, Italia
| | - Massimo Sabbatini
- Dipartimento di Patologia Sistematica, Università degli studi di Napoli “Federico II”, Via S. Pansini 5, I-80131 Napoli, Italia
| | - Domenico Spinelli
- Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126 Bologna, Italia
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Jiang S, Tang Q, Rong R, Tang L, Xu M, Lu J, Jia Y, Ooi Y, Hou J, Guo J, Yang B, Zhu T. Mycophenolate mofetil inhibits macrophage infiltration and kidney fibrosis in long-term ischemia-reperfusion injury. Eur J Pharmacol 2012; 688:56-61. [PMID: 22609232 DOI: 10.1016/j.ejphar.2012.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 04/22/2012] [Accepted: 05/04/2012] [Indexed: 01/06/2023]
Abstract
Immunosuppressants have been widely used in renal transplantation, in which ischemia-reperfusion injury is inevitable. Mycophenolate mofetil (MMF) is a relative novel immunosuppressant and also attenuates ischemia-reperfusion injury in the acute phase, but its long-term effects are still obscure. Unilateral renal ischemia-reperfusion injury model was established in Sprague-Dawley rats and 30 mg/kg/day MMF or natural saline was administered a day before the surgery. Renal function was monitored, and histological changes and fibrosis in the kidney were evaluated in both short and long terms. TGF-β1 secretion and MCP-1 expression were determined by immunohistochemistry and real-time PCR respectively. The infiltration of macrophages in renal tissues was also assessed by fluorescence activated cell sorting (FACS). MMF treatment significantly improved renal function in ischemia-reperfusion injury rats in the short and long-term and also effectively prevented interstitial fibrosis. TGF-β1 secretion and MCP-1 expression in the renal tissue of MMF-treated rats were much lower than those in natural saline-treated rats, with much less macrophage infiltration as well. MMF treatment effectively prevented the deterioration of renal function and interstitial fibrosis in ischemia-reperfusion injury rats, which may be associated with decreased TGF-β1, MCP-1 and macrophages. These results provide evidence for the choice of MMF in the renal transplant patients not only for acute renal injury but also for long-term survival of renal allograft.
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Affiliation(s)
- Shuai Jiang
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
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