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Kamt SF, Liu J, Yan LJ. Renal-Protective Roles of Lipoic Acid in Kidney Disease. Nutrients 2023; 15:nu15071732. [PMID: 37049574 PMCID: PMC10097220 DOI: 10.3390/nu15071732] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
The kidney is a crucial organ that eliminates metabolic waste and reabsorbs nutritious elements. It also participates in the regulation of blood pressure, maintenance of electrolyte balance and blood pH homeostasis, as well as erythropoiesis and vitamin D maturation. Due to such a heavy workload, the kidney is an energy-demanding organ and is constantly exposed to endogenous and exogenous insults, leading to the development of either acute kidney injury (AKI) or chronic kidney disease (CKD). Nevertheless, there are no therapeutic managements to treat AKI or CKD effectively. Therefore, novel therapeutic approaches for fighting kidney injury are urgently needed. This review article discusses the role of α-lipoic acid (ALA) in preventing and treating kidney diseases. We focus on various animal models of kidney injury by which the underlying renoprotective mechanisms of ALA have been unraveled. The animal models covered include diabetic nephropathy, sepsis-induced kidney injury, renal ischemic injury, unilateral ureteral obstruction, and kidney injuries induced by folic acid and metals such as cisplatin, cadmium, and iron. We highlight the common mechanisms of ALA’s renal protective actions that include decreasing oxidative damage, increasing antioxidant capacities, counteracting inflammation, mitigating renal fibrosis, and attenuating nephron cell death. It is by these mechanisms that ALA achieves its biological function of alleviating kidney injury and improving kidney function. Nevertheless, we also point out that more comprehensive, preclinical, and clinical studies will be needed to make ALA a better therapeutic agent for targeting kidney disorders.
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Affiliation(s)
- Sulin F. Kamt
- Department of Pharmaceutical Sciences, College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Jiankang Liu
- School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao 266071, China
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Liang-Jun Yan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
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2
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Glavan MR, Socaciu C, Socaciu AI, Gadalean F, Cretu OM, Vlad A, Muntean DM, Bob F, Milas O, Suteanu A, Jianu DC, Stefan M, Balint L, Ienciu S, Petrica L. Untargeted Metabolomics by Ultra-High-Performance Liquid Chromatography Coupled with Electrospray Ionization-Quadrupole-Time of Flight-Mass Spectrometry Analysis Identifies a Specific Metabolomic Profile in Patients with Early Chronic Kidney Disease. Biomedicines 2023; 11:biomedicines11041057. [PMID: 37189675 DOI: 10.3390/biomedicines11041057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/21/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023] Open
Abstract
Chronic kidney disease (CKD) has emerged as one of the most progressive diseases with increased mortality and morbidity. Metabolomics offers new insights into CKD pathogenesis and the discovery of new biomarkers for the early diagnosis of CKD. The aim of this cross-sectional study was to assess metabolomic profiling of serum and urine samples obtained from CKD patients. Untargeted metabolomics followed by multivariate and univariate analysis of blood and urine samples from 88 patients with CKD, staged by estimated glomerular filtration rate (eGFR), and 20 healthy control subjects was performed using ultra-high-performance liquid chromatography coupled with electrospray ionization-quadrupole-time of flight-mass spectrometry. Serum levels of Oleoyl glycine, alpha-lipoic acid, Propylthiouracil, and L-cysteine correlated directly with eGFR. Negative correlations were observed between serum 5-Hydroxyindoleacetic acid, Phenylalanine, Pyridoxamine, Cysteinyl glycine, Propenoylcarnitine, Uridine, and All-trans retinoic acid levels and eGFR. In urine samples, the majority of molecules were increased in patients with advanced CKD as compared with early CKD patients and controls. Amino acids, antioxidants, uremic toxins, acylcarnitines, and tryptophane metabolites were found in all CKD stages. Their dual variations in serum and urine may explain their impact on both glomerular and tubular structures, even in the early stages of CKD. Patients with CKD display a specific metabolomic profile. Since this paper represents a pilot study, future research is needed to confirm our findings that metabolites can serve as indicators of early CKD.
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Affiliation(s)
- Mihaela-Roxana Glavan
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Carmen Socaciu
- Research Center for Applied Biotechnology and Molecular Therapy BIODIATECH, SC Proplanta, 400478 Cluj-Napoca, Romania
| | - Andreea Iulia Socaciu
- Department of Occupational Health, University of Medicine and Pharmacy “Iuliu Haţieganu”, 400347 Cluj-Napoca, Romania
| | - Florica Gadalean
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Octavian M. Cretu
- Department of Surgery—Surgical Semiotics, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timişoara, Romania
| | - Adrian Vlad
- Department of Internal Medicine II—Diabetes and Metabolic Diseases, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Danina M. Muntean
- Department of Functional Sciences—Pathophysiology, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Center for Translational Research and Systems Medicine, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Flaviu Bob
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Oana Milas
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Anca Suteanu
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Dragos Catalin Jianu
- Deptartment of Neurosciences—Neurology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Cognitive Research in Neuropsychiatric Pathology, Clinical County Emergency Hospital, Victor Babeș” University of Medicine and Pharmacy, 300723 Timișoara, Romania
| | - Maria Stefan
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Lavinia Balint
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Silvia Ienciu
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Ligia Petrica
- Department of Internal Medicine II—Nephrology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
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KAÇMAZ F, OZCAN O, ARPACI A, AYAZ E, BAYRAKTAR HS, GÖRÜR S. Investigation of the Effects of Lipoic Acid and Dihydrolipoate on Experimental Renal Ischemia-Reperfusion Model. MUSTAFA KEMAL ÜNIVERSITESI TIP DERGISI 2022. [DOI: 10.17944/mkutfd.1012649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Mallela SK, Merscher S, Fornoni A. Implications of Sphingolipid Metabolites in Kidney Diseases. Int J Mol Sci 2022; 23:ijms23084244. [PMID: 35457062 PMCID: PMC9025012 DOI: 10.3390/ijms23084244] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 12/18/2022] Open
Abstract
Sphingolipids, which act as a bioactive signaling molecules, are involved in several cellular processes such as cell survival, proliferation, migration and apoptosis. An imbalance in the levels of sphingolipids can be lethal to cells. Abnormalities in the levels of sphingolipids are associated with several human diseases including kidney diseases. Several studies demonstrate that sphingolipids play an important role in maintaining proper renal function. Sphingolipids can alter the glomerular filtration barrier by affecting the functioning of podocytes, which are key cellular components of the glomerular filtration barrier. This review summarizes the studies in our understanding of the regulation of sphingolipid signaling in kidney diseases, especially in glomerular and tubulointerstitial diseases, and the potential to target sphingolipid pathways in developing therapeutics for the treatment of renal diseases.
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Affiliation(s)
- Shamroop kumar Mallela
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA;
- Peggy and Harold Katz Family Drug Discovery Center, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Sandra Merscher
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA;
- Peggy and Harold Katz Family Drug Discovery Center, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Correspondence: (S.M.); (A.F.); Tel.: +1-305-243-6567 (S.M.); +1-305-243-3583 (A.F.); Fax: +1-305-243-3209 (S.M.); +1-305-243-3506 (A.F.)
| | - Alessia Fornoni
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA;
- Peggy and Harold Katz Family Drug Discovery Center, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Correspondence: (S.M.); (A.F.); Tel.: +1-305-243-6567 (S.M.); +1-305-243-3583 (A.F.); Fax: +1-305-243-3209 (S.M.); +1-305-243-3506 (A.F.)
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Othman MA, Mubarak HA, Sayed MM. Ameliorative role of alpha-lipoic acid in renal cortical structural damage, induced by limb ischemia-reperfusion injury in the rat. Ultrastruct Pathol 2022; 46:110-121. [PMID: 35135431 DOI: 10.1080/01913123.2022.2035875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Ischemia-reperfusion injury is related to kidney dysfunction due to bilateral lower limb ischemia. This kidney injury may lead to acute kidney failure and mortality. Alpha-Lipoic Acid, a known antioxidant, can ameliorate kidney dysfunction and histopathology related to several etiologies. Ischemia was performed in adult male rats by bilateral femoral artery occlusion, then ischemia-reperfusion was done for 1 day and 7 days. Lipoic acid was administered to rats that had undergone ischemia-reperfusion for 7 days. The renal cortices of the kidneys of the tested groups were processed for light and electron microscopic examination. Immunohistochemical evaluation was performed using the following markers: cleaved caspase 3, inducible nitric oxide synthase, and tumor necrosis factor-alpha. There was damage to the renal cortical tubules and degeneration of podocytes and thickening of the glomerular basement membrane. Additionally, there was an increase in apoptosis and the inflammatory markers' immunoreactivity. Administration of alpha-lipoic acid resulted in improvement of the structural and immunohistochemical changes of the renal cortex. This may suggest a therapeutic rule of it and promising application for variable kidney injuries.
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Affiliation(s)
- Manal A Othman
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.,Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assuit, Egypt
| | - Heba A Mubarak
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assuit, Egypt
| | - Manal M Sayed
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assuit, Egypt
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6
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Effects of Lipoic Acid on Ischemia-Reperfusion Injury. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5093216. [PMID: 34650663 PMCID: PMC8510805 DOI: 10.1155/2021/5093216] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/07/2021] [Accepted: 09/14/2021] [Indexed: 12/15/2022]
Abstract
Ischemia-reperfusion (I/R) injury often occurred in some pathologies and surgeries. I/R injury not only harmed to physiological functions of corresponding organ and tissue but also induced multiple tissue or organ dysfunctions (even these in distant locations). Although the reperfusion of blood attenuated I/R injury to a certain degree, the risk of secondary damages was difficult to be controlled and it even caused failures of these tissues and organs. Lipoic acid (LA), as an endogenous active substance and a functional agent in food, owns better safety and effects in our body (e.g., enhancing antioxidant activity, improving cognition and dementia, controlling weight, and preventing multiple sclerosis, diabetes complication, and cancer). The literature searching was conducted in PubMed, Embase, Cochrane Library, Web of Science, and SCOPUS from inception to 20 May 2021. It had showed that endogenous LA was exhausted in the process of I/R, which further aggravated I/R injury. Thus, supplements with LA timely (especially pretreatments) may be the prospective way to prevent I/R injury. Recently, studies had demonstrated that LA supplements significantly attenuated I/R injuries of many organs, though clinic investigations were short at present. Hence, it was urgent to summarize these progresses about the effects of LA on different I/R organs as well as the potential mechanisms, which would enlighten further investigations and prepare for clinic applications in the future.
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7
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Andrianova NV, Zorov DB, Plotnikov EY. Targeting Inflammation and Oxidative Stress as a Therapy for Ischemic Kidney Injury. BIOCHEMISTRY (MOSCOW) 2021; 85:1591-1602. [PMID: 33705297 DOI: 10.1134/s0006297920120111] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Inflammation and oxidative stress are the main pathological processes that accompany ischemic injury of kidneys and other organs. Based on this, these factors are often chosen as a target for treatment of acute kidney injury (AKI) in a variety of experimental and clinical studies. Note, that since these two components are closely interrelated during AKI development, substances that treat one of the processes often affect the other. The review considers several groups of promising nephroprotectors that have both anti-inflammatory and antioxidant effects. For example, many antioxidants, such as vitamins, polyphenolic compounds, and mitochondria-targeted antioxidants, not only reduce production of the reactive oxygen species in the cell but also modulate activity of the immune cells. On the other hand, immunosuppressors and non-steroidal anti-inflammatory drugs that primarily affect inflammation also reduce oxidative stress under some conditions. Another group of therapeutics is represented by hormones, such as estrogens and melatonin, which significantly reduce severity of the kidney damage through modulation of both these processes. We conclude that drugs with combined anti-inflammatory and antioxidant capacities are the most promising agents for the treatment of acute ischemic kidney injury.
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Affiliation(s)
- N V Andrianova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.,Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - D B Zorov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia. .,Kulakov National Medical Research Center of Obstetrics, Gynecology and Perinatology, Moscow, 117997, Russia
| | - E Y Plotnikov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia. .,Kulakov National Medical Research Center of Obstetrics, Gynecology and Perinatology, Moscow, 117997, Russia.,Sechenov First Moscow State Medical University, Institute of Molecular Medicine, Moscow, 119991, Russia
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8
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Martinelli I, Tomassoni D, Roy P, Di Cesare Mannelli L, Amenta F, Tayebati SK. Antioxidant Properties of Alpha-Lipoic (Thioctic) Acid Treatment on Renal and Heart Parenchyma in a Rat Model of Hypertension. Antioxidants (Basel) 2021; 10:antiox10071006. [PMID: 34201726 PMCID: PMC8300705 DOI: 10.3390/antiox10071006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 01/01/2023] Open
Abstract
Renal and cardiac impairments are frequent events in the presence of hypertension. Organ damage is mainly linked to oxidative stress due to high blood pressure and may be reduced by antioxidant supplementation. Alpha-lipoic acid (ALA) is one of most effective antioxidants. It is widely used as a nutritional supplement in a racemic mixture (+/–), even though the (+)-enantiomer is biologically active. This study was designed to investigate the effect of treatment with (+/–)-ALA and its enantiomers on renal and heart parenchyma in spontaneously hypertensive rats (SHR), using immunochemical and immunohistochemical techniques. The results confirmed that the oxidative mechanisms of organ alterations, due to hypertension, and characterized by glomerular and tubular lesions, left ventricular hypertrophy, and fibrosis but not by apoptosis were accompanied by proteins’ and nucleic acids’ oxidation. We found greater effectiveness of (+)-ALA compared to (+/−)-ALA in reducing oxidative stress, cardiac and renal damages in SHR. To conclude, these data propose (+)-ALA as one of the more appropriate antioxidant molecules to prevent renal and cardiac alterations associated with hypertension.
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Affiliation(s)
- Ilenia Martinelli
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (I.M.); (F.A.)
| | - Daniele Tomassoni
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (D.T.); (P.R.)
| | - Proshanta Roy
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (D.T.); (P.R.)
| | - Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Pharmaceutical and Child Health Area (NEUROFARBA), University of Florence, 50139 Florence, Italy;
| | - Francesco Amenta
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (I.M.); (F.A.)
| | - Seyed Khosrow Tayebati
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy; (I.M.); (F.A.)
- Correspondence:
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Sato A, Nishioka S, Kiuchi M, Imada Y, Makino K, Nakagawa K, Tanaka R, Matsumura Y, Ohkita M. Grape Extract from Chardonnay Seeds Restores Deoxycorticosterone Acetate-Salt-Induced Endothelial Dysfunction and Hypertension in Rats. Biol Pharm Bull 2020; 43:59-67. [PMID: 31902933 DOI: 10.1248/bpb.b19-00540] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Grape extract (GE), which contains various polyphenolic compounds, exerts protective effects against lifestyle-related diseases, such as diabetes and hypertension. We pharmacologically investigated whether dietary supplements with an extract from Chardonnay exerted antihypertensive effects in deoxycorticosterone acetate (DOCA)-salt-induced hypertensive rats. GE increased nitric oxide (NO) production by activating the phosphatidylinositol 3-kinase (PI3K)/Akt pathway in cultured endothelial cells and induced vasorelaxation in the aorta and mesenteric artery via the same pathway. The development and progression of hypertension by the DOCA-salt treatment was significantly inhibited in GE-fed rats. Reduced vasoreactive responses to acetylcholine in the aorta of DOCA-salt rats were significantly ameliorated by the GE diet. Dietary GE supplements slightly diminished vascular superoxide anion production induced by the DOCA-salt treatment. On the other hand, dietary GE supplements had no effect on the progression of hypertension in rats in which NO synthase was pharmacologically and chronically suppressed. In addition, the oral administration of GE for 5 d in healthy rats enhanced endothelial NO synthase (eNOS) gene expression and vascular reactivity to acetylcholine in the aorta. Thus, GE has endothelium-dependent vasorelaxant properties that are mediated by the activation of endothelial NO synthase via the PI3K/Akt pathway, and this mechanism is conducive to the antihypertensive effects of GE observed in DOCA-salt-treated rats.
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Affiliation(s)
- Akihiro Sato
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Satoshi Nishioka
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Mika Kiuchi
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Yuki Imada
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Kotaro Makino
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Keisuke Nakagawa
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Ryosuke Tanaka
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Yasuo Matsumura
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Mamoru Ohkita
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
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Ohkita M, Hayashi H, Ito K, Shigematsu N, Tanaka R, Tsutsui H, Matsumura Y. Preventive Effects of Grape Extract on Ischemia/Reperfusion-Induced Acute Kidney Injury in Mice. Biol Pharm Bull 2020; 42:1883-1890. [PMID: 31685770 DOI: 10.1248/bpb.b19-00462] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Since grape extract (GE) contains oligomeric proanthocyanidins and numerous polyphenols, dietary GE supplements may exert protective effects against various diseases. The present study investigated the pharmacological effects of GE derived from Chardonnay in vitro and in vivo. GE (100 µg/mL) completely inhibited tumor necrosis factor-α-induced endothelin-1, monocyte chemoattractant protein-1, interleukin-1β, and intercellular adhesion molecule-1 gene expression in cultured endothelial cells. GE also strongly stimulated the phosphatidylinositol 3-kinase (PI3K)/Akt/endothelial nitric oxide synthase (eNOS) pathway. In the in vivo study, the effects of GE on ischemic acute kidney injury (AKI) were examined using male C57bl/6J wild-type and eNOS-/- mice. Right nephrectomized mice were exposed to 45 min of ischemia in the left kidney and this was followed by reperfusion. Although renal functional parameters in AKI mice significantly increased 48 h after reperfusion, the administration of GE (0.1 and 1 mg/kg, intravenous (i.v.)) 5 min before ischemia dose-dependently improved post-ischemic renal dysfunction in wild-type mice. Renal histopathological studies on AKI mice revealed tubular necrosis, proteinaceous casts in tubuli, and medullary congestion. The administration of GE ameliorated this damage in wild-type mice, but not in eNOS-/- mice. Furthermore, GE significantly restored decreases in the renal nitric oxide metabolite content due to ischemia in wild-type mice, but not in eNOS-/- mice. Thus, eNOS is closely involved in the renoprotective effects of GE, strongly suggesting that GE supplements are useful as a prophylactic treatment for the development of ischemic AKI.
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Affiliation(s)
- Mamoru Ohkita
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Haruna Hayashi
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Kohei Ito
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Natsuko Shigematsu
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Ryosuke Tanaka
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Hidenobu Tsutsui
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
| | - Yasuo Matsumura
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences
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Continuous exposure to α-glycosyl isoquercitrin from developmental stage facilitates fear extinction learning in rats. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.02.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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12
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Antioxidant Supplementation in Renal Replacement Therapy Patients: Is There Evidence? OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9109473. [PMID: 30774749 PMCID: PMC6350615 DOI: 10.1155/2019/9109473] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/15/2018] [Accepted: 12/20/2018] [Indexed: 12/26/2022]
Abstract
The disruption of balance between production of reactive oxygen species and antioxidant systems in favor of the oxidants is termed oxidative stress (OS). To counteract the damaging effects of prooxidant free radicals, all aerobic organisms have antioxidant defense mechanisms that are aimed at neutralizing the circulating oxidants and repair the resulting injuries. Antioxidants are either endogenous (the natural defense mechanisms produced by the human body) or exogenous, found in supplements and foods. OS is present at the early stages of chronic kidney disease, augments progressively with renal function deterioration, and is further exacerbated by renal replacement therapy. End-stage renal disease patients, on hemodialysis (HD) or peritoneal dialysis (PD), suffer from accelerated OS, which has been associated with increased risk for mortality and cardiovascular disease. During HD sessions, the bioincompatibility of dialyzers and dialysate trigger activation of white blood cells and formation of free radicals, while a significant loss of antioxidants is also present. In PD, the bioincompatibility of solutions, including high osmolality, elevated lactate levels, low pH, and accumulation of advanced glycation end-products trigger formation of prooxidants, while there is significant loss of vitamins in the ultrafiltrate. A number of exogenous antioxidants have been suggested to ameliorate OS in dialysis patients. Vitamins B, C, D, and E, coenzyme Q10, L-carnitine, a-lipoic acid, curcumin, green tea, flavonoids, polyphenols, omega-3 polyunsaturated fatty acids, statins, trace elements, and N-acetylcysteine have been studied as exogenous antioxidant supplements in both PD and HD patients.
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Casciato P, Ambrosi N, Caro F, Vazquez M, Müllen E, Gadano A, de Santibañes E, de Santibañes M, Zandomeni M, Chahdi M, Lazarte JC, Biagiola DA, Iaquinandi JC, Santofimia-Castaño P, Iovanna J, Incardona C, Chuluyan E. α-lipoic acid reduces postreperfusion syndrome in human liver transplantation - a pilot study. Transpl Int 2018; 31:1357-1368. [PMID: 29974521 DOI: 10.1111/tri.13314] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 06/11/2018] [Accepted: 06/29/2018] [Indexed: 12/21/2022]
Abstract
A double-blind randomized controlled trial was performed to compare the safety and efficacy of α-lipoic acid (ALA) in liver transplantation (LT). The grafts were randomized to receive ALA or placebo before the cold ischemia time. Furthermore, patients transplanted with the ALA-perfused graft received 600 mg of intravenous ALA, while patients with the nonperfused graft received the placebo just before graft reperfusion. Hepatic biopsy was performed 2 h postreperfusion. Blood samples were collected before, during and 1 and 2 days after reperfusion. Quantitative polymerase chain reaction (qPCR) analysis was performed on biopsies to assess genes involved in the response to hypoxia, apoptosis, cell growth, survival and proliferation, cytokine production and tissue damage protection. Nine of 40 patients developed postreperfusion syndrome (PRS), but seven of them belonged to the control group. There was a decrease in PHD2 and an increase in alpha subunit of hypoxia-inducible factor-1 (HIF-1α) and baculoviral IAP repeat containing 2 (Birc2) transcript levels in the biopsies from the ALA-treated versus the control group of patients. Additionally, plasma levels of alarmins were lower in ALA-treated patients than control patients, which suggests that ALA-treated grafts are less inflammatory than untreated grafts. These results showed that ALA is safe for use in LT, induces gene changes that protect against hypoxia and oxidative stress and reduces the appearance of PRS.
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Affiliation(s)
- Paola Casciato
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - Nella Ambrosi
- Facultad de Medicina, CEFYBO-CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fiorella Caro
- Facultad de Medicina, CEFYBO-CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mónica Vazquez
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - Eduardo Müllen
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - Adrian Gadano
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | | | | | - Marcos Zandomeni
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - Magali Chahdi
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - Julio C Lazarte
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | - David A Biagiola
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina
| | | | - Patricia Santofimia-Castaño
- Centre de Recherche en Cancérologie de Marseille (CRCM), INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Juan Iovanna
- Centre de Recherche en Cancérologie de Marseille (CRCM), INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Claudio Incardona
- Unidad de Trasplante Hepático, Hospital Italiano, Buenos Aires, Argentina.,Fundación GADOR, Buenos Aires, Argentina
| | - Eduardo Chuluyan
- Facultad de Medicina, CEFYBO-CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
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Abstract
α-Lipoic acid has been shown to provide cytoprotection in some tissues through antioxidant and antiapoptotic mechanisms. We have enhanced these properties by synthetic modification, resulting in a new chemical entity, CMX-2043, with proven efficacy in an animal model of cardiac ischemia-reperfusion injury. The present studies compare cytoprotective cellular pathways of R-α-lipoic acid and CMX-2043. Biochemical and cellular assays were used to compare antioxidant potency, tyrosine kinase activation, and protein kinase B (Akt) phosphorylation. CMX-2043 was more effective than lipoic acid in antioxidant effect, activation of insulin receptor kinase, soluble tyrosine kinase, and Akt phosphorylation. Activation of insulin-like growth factor 1 receptor was similar for both. CMX-2043 stimulation of Akt phosphorylation was abolished by the phosphatidylinositide 3-kinase inhibitor LY294002. Consistent with Akt activation, CMX-2043 reduced carbachol-induced calcium overload. The S-stereoisomer of CMX-2043 was less active in the biochemical assays than the R-isomer. These results are consistent with cytoprotection through activation of Akt and antioxidant action. CMX-2043 may thus provide a pharmacological approach to cytoprotection consistent with established anti-apoptotic mechanisms.
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Chen H, Busse LW. Novel Therapies for Acute Kidney Injury. Kidney Int Rep 2017; 2:785-799. [PMID: 29270486 PMCID: PMC5733745 DOI: 10.1016/j.ekir.2017.06.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/17/2017] [Accepted: 06/19/2017] [Indexed: 12/25/2022] Open
Abstract
Acute kidney injury (AKI) is a common disease with a complex pathophysiology. The old paradigm of identifying renal injury based on location-prerenal, intrarenal, and postrenal-is now being supplanted with a new paradigm based on observable kidney injury patterns. The pathophysiology of AKI on a molecular and microanatomical level includes inflammation, immune dysregulation, oxidative injury, and impaired microcirculation. Treatment has traditionally been supportive, including the avoidance of nephrotoxins, judicious volume and blood pressure management, hemodynamic monitoring, and renal replacement therapy. Fluid overload and chloride-rich fluids are now implicated in the development of AKI, and resuscitation with a balanced, buffered solution at a conservative rate will mitigate risk. Novel therapies, which address specific observable kidney injury patterns include direct oxygen-free radical scavengers such as α-lipoic acid, curcumin, sodium-2-mercaptoethane sulphonate, propofol, and selenium. In addition, angiotensin II and adenosine receptor antagonists hope to ameliorate kidney injury via manipulation of renal hemodynamics and tubulo-glomerular feedback. Alkaline phosphatase, sphingosine 1 phosphate analogues, and dipeptidylpeptidase-4 inhibitors counteract kidney injury via manipulation of inflammatory pathways. Finally, genetic modifiers such as 5INP may mitigate AKI via transcriptive processes.
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Affiliation(s)
- Huaizhen Chen
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Laurence William Busse
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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Alpha-lipoic acid ameliorates the epithelial mesenchymal transition induced by unilateral ureteral obstruction in mice. Sci Rep 2017; 7:46065. [PMID: 28378840 PMCID: PMC5380949 DOI: 10.1038/srep46065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 03/10/2017] [Indexed: 12/11/2022] Open
Abstract
The epithelial-to-mesenchymal transition (EMT) is one of mechanisms that induce renal interstitial fibrosis. Understanding EMT in renal fibrosis has important therapeutic implications for patients with kidney disease. Alpha-lipoic acid (ALA) is a natural compound with antioxidant properties. Studies for ALA are performed in acute kidney injury with renal tubular apoptosis, renal inflammation, and oxidative stress. We investigated the effects of ALA on EMT-mediated renal interstitial fibrosis in mice with unilateral ureteral obstruction (UUO). UUO mice developed severe tubular atrophy and tubulointerstitial fibrosis, with a robust EMT response and ECM deposition after 7 postoperative days. In contrast, ALA-treated UUO mice showed only moderate injury and minimal fibrosis and also larger reductions in the expression of ECM proteins, inflammatory factors, and EMT markers. ALA was shown to be involved in the suppression of infiltrating macrophages associated with EMT and the progression of interstitial fibrosis. It also lessened the destruction of the tubular basement membrane, by reducing the expression of matrix metalloproteinases. This is the first study to show that ALA modulates EMT in a UUO mouse model. Our results suggest that ALA merits further exploration as a therapeutic agent in the prevention and treatment of chronic kidney disease.
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Pianta T, Succar L, Davidson T, Buckley N, Endre Z. Monitoring treatment of acute kidney injury with damage biomarkers. Toxicol Lett 2017; 268:63-70. [DOI: 10.1016/j.toxlet.2017.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 12/29/2016] [Accepted: 01/01/2017] [Indexed: 11/28/2022]
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Zhang J, McCullough PA. Lipoic Acid in the Prevention of Acute Kidney Injury. Nephron Clin Pract 2016; 134:133-140. [DOI: 10.1159/000448666] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 07/15/2016] [Indexed: 11/19/2022] Open
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α-Lipoic Acid Protects Against Ischemia-Reperfusion Injury in Simultaneous Kidney-Pancreas Transplantation. Transplantation 2016; 100:908-15. [PMID: 26502371 DOI: 10.1097/tp.0000000000000981] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Multiple factors have been implicated in the process of ischemia-reperfusion injury (IRI) in organ transplantation. Among these factors, oxidative damage seems to initiate the injury. α-lipoic acid (ALA) is a potent antioxidant that is used in patients with diabetic polyneuropathy. The aim of the present study was to determine the effect of ALA in patients undergoing simultaneous kidney-pancreas transplant by evaluating the functional recovery of the graft and biochemical markers of IRI. METHODS Twenty-six patients were included in the following groups: (i) untreated control; (ii) donor and recipient (DR) ALA-treated, in which ALA was administered both to the deceased donor and to the recipients; and (iii) recipient ALA-treated group. The expression of inflammatory genes, as observed in biopsies taken at the end of surgery, as well as the serum cytokines, secretory leukocyte protease inhibitor, regenerating islet-derived protein 3β/pancreatitis-associated protein, amylase, lipase, glucose, and creatinine levels were quantified as markers of organ function. RESULTS The DR group showed high levels of TGFβ and low levels of C3 and TNFα in the kidneys, whereas high levels of C3 and heme oxygenase were identified in pancreas biopsies. Decreases in serum IL-8, IL-6, secretory leukocyte protease inhibitor, and regenerating islet-derived protein 3 β/pancreatitis-associated protein were observed after surgery in the DR group. Serum lipase and amylase were lower in the DR group than in the control and recipient groups. Early kidney dysfunction and clinical pancreatitis were higher in the control group than in either treatment group. CONCLUSIONS These results show that ALA preconditioning is capable of reducing inflammatory markers while decreasing early kidney dysfunction and clinical posttransplant pancreatitis.
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das Neves RNP, Carvalho F, Carvalho M, Fernandes E, Soares E, de Bastos ML, de Pereira ML. Protective Activity of Hesperidin and Lipoic Acid Against Sodium Arsenite Acute Toxicity in Mice. Toxicol Pathol 2016; 32:527-35. [PMID: 15603538 DOI: 10.1080/01926230490502566] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The objective of the present work was to evaluate the toxic effects of sodium arsenite, As(III), in mice and the protective effect of 2 antioxidants, hesperidin and lipoic acid, against the observed As(III)-induced toxicity. In each study, mice were assigned to 1 of 4 groups: control, antioxidant, antioxidant + arsenite, and arsenite. Animals were first injected with the vehicle or 25 mg antioxidant/kg BW. After 30 minutes they received an injection of 10 mg arsenite/kg BW or 0.9% NaCl. Two hours after the first injection, the liver, kidney, and testis were collected for histological evaluation. Liver samples were also taken for quantification of arsenic. In mice exposed only to As(III), various histopathological effects were observed in the liver, kidneys, and testes. In mice pretreated with either hesperidin or lipoic acid, a reduction of histopathologic effects on the liver and kidneys was observed. No protective effects were observed in the testes for either of the 2 studied antioxidants. In conclusion, hesperidin and lipoic acid provided protective effects against As(III)-induced acute toxicity in the liver and kidneys of mice. These compounds may potentially play an important role in the protection of populations chronically exposed to arsenic.
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Asci H, Saygin M, Cankara FN, Bayram D, Yesilot S, Candan IA, Ilhan I. The impact of alpha-lipoic acid on amikacin-induced nephrotoxicity. Ren Fail 2014; 37:117-21. [DOI: 10.3109/0886022x.2014.967645] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Amin KA, Hashem KS, Al-muzafar HM, Taha EM. Oxidative hepatotoxicity effects of monocrotaline and its amelioration by lipoic acid, S-adenosyl methionine and vitamin E. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2014; 11:35-41. [PMID: 24413220 DOI: 10.1515/jcim-2013-0041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Accepted: 12/07/2013] [Indexed: 01/06/2023]
Abstract
Liver is the major site for several xenobiotics metabolism, and formation of toxic metabolites that may be hepatotoxic, therefore the burden of metabolism and exposure to dangerous chemicals make liver vulnerable to a variety of disorders. Our work aimed to investigate the effects of some antioxidants such as lipoic acid (LA), S-adenosyl methionine (SAM) and vitamin E in a trail to investigate the possibility of using these substances to relieve and protect liver from exposure to monocrotaline (MCT). Twenty-five mature adult rats were classified into five groups (five rats in each group), control group, MCT-induced hepatic damage, LA+MCT, SAM+MCT and vitamin E+MCT group. Homogenates of liver samples were used for measuring the oxidative biomarkers and hepatic antioxidant status. The results showed that administration of vitamin E, SAM and LA caused a significant increase in liver glutathione contents, glutathione reductase, glutathione peroxidase and glutathione-S-transferase activities and a significant decrease in hepatic catalase and superoxide dismutase. We could conclude that administration of natural LA, SAM and vitamin E before and after MCT injection modulate the hepatic oxidative stresses induced by MCT in various extents.
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Kates SA, Casale RA, Baguisi A, Beeuwkes R. Lipoic acid analogs with enhanced pharmacological activity. Bioorg Med Chem 2013; 22:505-12. [PMID: 24316353 DOI: 10.1016/j.bmc.2013.10.057] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 10/23/2013] [Accepted: 10/31/2013] [Indexed: 02/07/2023]
Abstract
Lipoic acid (1,2-dithiolane-3-pentanoic acid) is a pharmacophore with unique antioxidant and cytoprotective properties. We synthesized a library based upon the condensation of natural and unnatural amino acids with the carboxylic acid moiety of lipoic acid. SAR studies were conducted using a cardiac ischemia-reperfusion animal model. Cytoprotective efficacy was associated with the R-enantiomer of the dithiolane. Potency of library compounds was dictated by the acidic strength of the adduct. α-N-[(R)-1,2-dithiolane-3-pentanoyl]-L-glutamyl-L-alanine, designated CMX-2043, was chosen for further pharmacologic evaluation.
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Affiliation(s)
- Steven A Kates
- Ischemix, LLC, 63 Great Road, Maynard, MA 01759, United States.
| | - Ralph A Casale
- Ischemix, LLC, 63 Great Road, Maynard, MA 01759, United States
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Cavdar Z, Ozbal S, Celik A, Ergur BU, Guneli E, Ural C, Camsari T, Guner GA. The effects of alpha-lipoic acid on MMP-2 and MMP-9 activities in a rat renal ischemia and re-perfusion model. Biotech Histochem 2013; 89:304-14. [PMID: 24160412 DOI: 10.3109/10520295.2013.847498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are enzymes that are responsible for degradation of extracellular matrix (ECM); they are involved in the pathogenesis of ischemia-re-perfusion (I-R) injury. We investigated the possible preventive effect of alpha-lipoic acid (LA) in a renal I-R injury model in rats by assessing its reducing effect on the expression and activation of MMP-2 and MMP-9 induced by I-R. Rats were assigned to four groups: control, sham-operated, I-R (saline, i.p.) and I-R+ LA (100 mg/kg, i.p.). After a right nephrectomy, I-R was induced by clamping the left renal pedicle for 1 h, followed by 6 h re-perfusion. In the sham group, a right nephrectomy was performed and left renal pedicles were dissected without clamping and the entire left kidney was excised after 6 h. LA pretreatment was started 30 min prior to induction of ischemia. Injury to tubules was evaluated using light and electron microscopy. The expressions of MMP-2 and MMP-9 were determined by immunohistochemistry and their activities were analyzed by gelatin zymography. Serum creatinine was measured using a quantitative kit based on the Jaffe colorimetric technique. Malondialdehyde (MDA) and glutathione (GSH) were analyzed using high performance liquid chromatography. Tissue inhibitor of metalloproteinase (TIMP)-2 and TIMP-1 were assessed using enzyme-linked immunosorbent assay (ELISA). I-R caused tubular dilatation and brush border loss. LA decreased both renal dysfunction and abnormal levels of MDA and GSH during I-R. Moreover, LA decreased significantly both MMP-2 and MMP-9 expressions and activations during I-R. TIMP-1 and TIMP-2 levels were increased significantly by LA administration. LA modulated increased MMP-2 and MMP-9 activities and decreased TIMP-1 and TIMP-2 levels during renal I-R.
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Affiliation(s)
- Z Cavdar
- Department of Molecular Medicine, Health Sciences Institute
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Fujii Y, Segawa R, Kimura M, Wang L, Ishii Y, Yamamoto R, Morita R, Mitsumori K, Shibutani M. Inhibitory effect of α-lipoic acid on thioacetamide-induced tumor promotion through suppression of inflammatory cell responses in a two-stage hepatocarcinogenesis model in rats. Chem Biol Interact 2013; 205:108-18. [PMID: 23830814 DOI: 10.1016/j.cbi.2013.06.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 03/31/2013] [Accepted: 06/17/2013] [Indexed: 11/25/2022]
Abstract
To investigate the protective effect of α-lipoic acid (a-LA) on the hepatocarcinogenic process promoted by thioacetamide (TAA), we used a two-stage liver carcinogenesis model in N-diethylnitrosamine (DEN)-initiated and TAA-promoted rats. We examined the modifying effect of co-administered a-LA on the liver tissue environment surrounding preneoplastic hepatocellular lesions, with particular focus on hepatic macrophages and the mechanism behind the decrease in apoptosis of cells surrounding preneoplastic hepatocellular lesions during the early stages of hepatocellular tumor promotion. TAA increased the number and area of glutathione S-transferase placental form (GST-P)(+) liver cell foci and the numbers of proliferating and apoptotic cells in the liver. Co-administration with a-LA suppressed these effects. TAA also increased the numbers of ED2(+), cyclooxygenase-2(+), and heme oxygenase-1(+) hepatic macrophages as well as the number of CD3(+) lymphocytes. These effects were also suppressed by a-LA. Transcript levels of some inflammation-related genes were upregulated by TAA and downregulated by a-LA in real-time RT-PCR analysis. Outside the GST-P(+) foci, a-LA reduced the numbers of apoptotic cells, active caspase-8(+) cells and death receptor (DR)-5(+) cells. These results suggest that hepatic macrophages producing proinflammatory factors may be activated in TAA-induced tumor promotion. a-LA may suppress tumor-promoting activity by suppressing the activation of these macrophages and the subsequent inflammatory responses. Furthermore, a-LA may suppress tumor-promoting activity by suppressing the DR5-mediated extrinsic pathway of apoptosis and the subsequent regeneration of liver cells outside GST-P(+) foci.
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Key Words
- 8-OHdG
- 8-hydroxydeoxyguanosine
- Aldh1a1
- Apoptosis
- B-cell CLL/lymphoma 2
- BNF
- Bax
- Bcl2
- Bcl2-associated X protein
- Bcl2-like 1
- Bcl2l1
- CMD
- Casp
- Cd4
- Cd4 molecule
- Cd8a
- Cd8a molecule
- Col1a1
- Cox-2
- Cu
- Cx3cl1
- Cxcl10
- DAB
- DEN
- DR5
- Death receptor 5 (DR5)
- EMIQ
- Fadd
- Fas (TNFRSF6)-associated via death domain
- Fe
- GST-P
- Gpx2
- Gstm1
- HO-1
- Hprt
- Il1b
- Il4
- Inflammation
- Liver tumor promotion
- Mapk
- Mmp
- N-diethylnitrosamine
- NAD(P)H dehydrogenase, quinone 1
- Nfe2l2
- Nqo1
- PBS
- PCNA
- Ptgs2
- ROS
- Serpine1
- TAA
- TBARS
- TRAIL
- TUNEL
- Tgfb2
- Thioacetamide (TAA)
- Tnf
- Tnfrsf10b
- Tnfsf10
- Txn1
- a-LA
- aldehyde dehydrogenase family 1 member A1
- caspase
- chemokine (C-X-C motif) ligand 10
- chemokine (C-X3-C motif) ligand 1
- choline-methionine-deficient diet
- collagen, type I, alpha 1
- copper
- cyclooxygenase 2
- death receptor 5
- diaminobenzidine
- enzymatically modified isoquercitrin
- glutathione S-transferase mu 1
- glutathione S-transferase placental form
- glutathione peroxidase 2
- heme oxygenase-1
- hypoxanthine guanine phosphoribosyl transferase
- interleukin 1 beta
- interleukin 4
- iron
- matrix metalloproteinase
- mitogen activated protein kinase
- nuclear factor, erythroid derived 2, like 2
- phosphate buffered solution
- proliferating cell nuclear antigen
- prostaglandin-endoperoxide synthase 2
- reactive oxygen species
- serine (or cysteine) peptidase inhibitor, clade E, member 1
- terminal deoxynucleotidyl transferase-mediated nick end labeling
- thioacetamide
- thiobarbituric acid-reactive substances
- thioredoxin 1
- transforming growth factor, beta 2
- tumor necrosis factor
- tumor necrosis factor (ligand) superfamily, member 10
- tumor necrosis factor receptor superfamily, member 10b
- tumor necrosis factor-related apoptosis-inducing ligand
- α-Lipoic acid (a-LA)
- α-lipoic acid
- β-naphthoflavone
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Affiliation(s)
- Yuta Fujii
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
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Involvement of multiple cell cycle aberrations in early preneoplastic liver cell lesions by tumor promotion with thioacetamide in a two-stage rat hepatocarcinogenesis model. ACTA ACUST UNITED AC 2013; 65:979-88. [PMID: 23474136 DOI: 10.1016/j.etp.2013.01.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 01/09/2013] [Accepted: 01/23/2013] [Indexed: 02/06/2023]
Abstract
Thioacetamide (TAA) induces oxidative stress and hepatocarcinogenicity in rats. We previously reported that TAA promotion caused various disruptions in cell cycle protein expression in rats, including downregulation of p16(Ink4a), which is associated with intraexonic hypermethylation in hepatocellular proliferative lesions. This study further investigated the contribution of cell cycle aberrations associated with early hepatocarcinogenic processes induced by TAA using antioxidants, enzymatically modified isoquercitrin (EMIQ) and α-lipoic acid (ALA), in a two-stage rat hepatocarcinogenesis model. TAA-promotion after initiation with N-diethylnitrosamine increased the number and area of hepatocellular foci immunoreactive for glutathione S-transferase placental form (GST-P) and the numbers of proliferating and apoptotic cells. Co-treatment with EMIQ and ALA suppressed these increases. TAA-induced formation of p16(Ink4a-) foci in concordance with GST-P(+) foci was not suppressed by co-treatment with EMIQ or ALA. TAA-promotion increased cellular distributions of cell proliferation marker Ki-67, G2/M and spindle checkpoint proteins (phosphorylated checkpoint kinase 1 and Mad2), the DNA damage-related protein phosphorylated histone H2AX, and G2-M phase-related proteins (topoisomerase IIα, phosphorylated histone H3 and Cdc2) within GST-P(+) foci, and co-treatment with EMIQ or ALA suppressed these increases. These results suggest that downregulation of p16(Ink4a) may allow selective proliferation of preneoplastic cells by TAA promotion. However, antioxidants did not counteract this gene control. Moreover, effective suppression of TAA-induced cellular population changes within preneoplastic lesions by antioxidants may reflect facilitation of cell cycling and accumulation of DNA damage causing the activation of cell cycle checkpoints, leading to G2 and M phase arrest at the early stages of hepatocarcinogenesis promoted by TAA.
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El-Sisi AEDE, El-Syaad ME, El-Desoky KI, Moussa EA. Protective effects of alpha lipoic acid versus N-acetylcysteine on ifosfamide-induced nephrotoxicity. Toxicol Ind Health 2013; 31:97-107. [DOI: 10.1177/0748233712469649] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Ifosfamide (IFO) is a highly effective chemotherapeutic agent for treating a variety of pediatric solid tumors. However, its use is limited due to its serious side effect on kidneys. The side-chain oxidation of IFO in renal tubular cells produces a reactive toxic metabolite that is believed to be responsible for its nephrotoxic effect. Therefore, this study was carried out to investigate the possible underlying mechanisms that may be involved in IFO-induced nephrotoxicity, including free radical generation and the possible role of alpha lipoic acid (ALA) versus N-acetylcysteine (NAC) in protection against this toxicity. Male albino rats were injected intraperitoneally with saline, IFO (50 mg/kg daily for 5 days), IFO + ALA (100 mg/kg daily for 8 days) and IFO + NAC (200 mg/kg daily for 8 days). Kidney malondialdehyde, nitric oxide and glutathione contents and serum biochemical parameters and histopathological analysis were determined. Both ALA and NAC markedly reduced the severity of renal dysfunction induced by IFO. NAC was more nephroprotective than ALA. This study suggests that oxidative stress is possibly involved in the IFO-induced nephrotoxicity in rats. The study also suggests the potential therapeutic role for ALA and NAC against IFO-induced nephrotoxicity.
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Affiliation(s)
- Alaa El-Din E El-Sisi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Tanta, Tanta, Egypt
| | - Magda E El-Syaad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Tanta, Tanta, Egypt
| | - Karima I El-Desoky
- Department of Pathology, Faculty of Medicine, University of Tanta, Tanta, Egypt
| | - Ethar A Moussa
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Tanta, Tanta, Egypt
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El-Beshbishy HA, Bahashwan SA, Aly HA, Fakher HA. Abrogation of cisplatin-induced nephrotoxicity in mice by alpha lipoic acid through ameliorating oxidative stress and enhancing gene expression of antioxidant enzymes. Eur J Pharmacol 2011; 668:278-84. [DOI: 10.1016/j.ejphar.2011.06.051] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 06/16/2011] [Accepted: 06/27/2011] [Indexed: 11/30/2022]
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Ohkita M, Kiso Y, Matsumura Y. Pharmacology in Health Foods: Improvement of Vascular Endothelial Function by French Maritime Pine Bark Extract (Flavangenol). J Pharmacol Sci 2011; 115:461-5. [DOI: 10.1254/jphs.10r37fm] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Barone JM, Alponti RF, Frezzatti R, Zambotti-Villela L, Silveira PF. Differential efficiency of simvastatin and lipoic acid treatments on Bothrops jararaca envenomation-induced acute kidney injury in mice. Toxicon 2010; 57:148-56. [PMID: 21087618 DOI: 10.1016/j.toxicon.2010.11.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 11/07/2010] [Accepted: 11/09/2010] [Indexed: 12/01/2022]
Abstract
Snake bite accidents by Bothrops genus is an important public health issue in Brazil and one of its most serious complications is the acute kidney injury (AKI). Here we evaluated the effects of Bothrops jararaca venom (vBj) and the treatments with lipoic acid (LA) and simvastatin (SA) on renal function, aminopeptidase (AP) activities and renal redox status. Primordial events for establishment of AKI by vBj were hyperuricemia, hypercreatinemia, urinary hyperosmolality, renal oxidative stress and reduction of hematocrit and protein content in the membrane of renal cortex and medulla and in the plasma. In the renal cortex and medulla the changes caused by vBj in soluble and membrane-bound AP activities had a similar pattern. The beneficial effects of LA and SA on envenomed mice were similar on the hyperuricemia, renal oxidative stress and reduction of hematocrit. LA mitigated the hypercreatinemia, but exacerbated the urinary urea and creatinine, whereas SA mitigated the decrease of plasma urea, urinary hyperosmolality and hypercreatinuria induced by vBj. The beneficial effects of LA and especially of SA on renal effects of vBj open a new perspective for clinical investigations of these drugs as coadjuvant agents in the serotherapy of Bothrops envenomation.
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Affiliation(s)
- Juliana Marton Barone
- Laboratory of Pharmacology, Instituto Butantan, Av. Vital Brasil, 1500, 05503-900 São Paulo, SP, Brazil
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Lipoic acid effects on renal function, aminopeptidase activities and oxidative stress in Crotalus durissus terrificus envenomation in mice. Toxicon 2010; 56:402-10. [DOI: 10.1016/j.toxicon.2010.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 03/19/2010] [Accepted: 04/07/2010] [Indexed: 11/19/2022]
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Kara M, Tellioglu G, Sehirli O, Yildar M, Krand O, Berber I, Cetinel S, Eren PA, Sener G, Titiz I. Evaluation of Gadolinium Pre-Treatment with or without Splenectomy in the Setting of Renal Ischemia Reperfusion Injury in Rats. Ren Fail 2009; 31:956-63. [DOI: 10.3109/08860220903216162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kobuchi S, Shintani T, Sugiura T, Tanaka R, Suzuki R, Tsutsui H, Fujii T, Ohkita M, Ayajiki K, Matsumura Y. Renoprotective effects of gamma-aminobutyric acid on ischemia/reperfusion-induced renal injury in rats. Eur J Pharmacol 2009; 623:113-8. [PMID: 19765583 DOI: 10.1016/j.ejphar.2009.09.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 08/25/2009] [Accepted: 09/08/2009] [Indexed: 10/20/2022]
Abstract
Enhanced renal sympathetic nerve activity during ischemic period and the renal venous norepinephrine overflow after reperfusion play important roles in the development of ischemic acute kidney injury. We investigated the effect of gamma-aminobutyric acid (GABA), an inhibitory neurotransmitter mainly in the central nervous system, on ischemia/reperfusion-induced acute kidney injury in anesthetized rats. Ischemic acute kidney injury was induced by clamping the left renal artery and vein for 45min followed by reperfusion 2weeks after the contralateral nephrectomy. Intravenous injection of GABA (10 and 50micromol/kg) to ischemic acute kidney injury rats dose-dependently suppressed the enhanced renal sympathetic nerve activity during the renal ischemia, the renal venous norepinephrine overflow after reperfusion and attenuated the ischemia/reperfusion-induced renal dysfunction with histological damage. Intravenous injection of CGP52432 (0.1micromol/kg), a selective GABA(B) receptor antagonist, eliminated the preventive effect by GABA (50micromol/kg) on ischemic acute kidney injury. In contrast, intravenous injection of baclofen (1micromol/kg), a selective GABA(B) receptor agonist, attenuated the ischemia/reperfusion-induced renal injury equivalent to GABA (50micromol/kg). These results indicate that GABA prevents the development of ischemia/reperfusion-induced acute kidney injury presumably via GABA(B) receptor, by suppressing the enhanced renal sympathetic nerve activity during ischemia and the increased norepinephrine overflow from renal sympathetic nerve ending.
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Affiliation(s)
- Shuhei Kobuchi
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
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Tunc T, Oter S, Güven A, Topal T, Kul M, Korkmaz A, Ongürü O, Sarici U. Protective effect of sulfhydryl-containing antioxidants against ischemia/reperfusion injury of prepubertal rat intestine. J Gastroenterol Hepatol 2009; 24:681-7. [PMID: 19054265 DOI: 10.1111/j.1440-1746.2008.05673.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND AIM Reactive oxygen species generated during reperfusion of the tissue are known to play an important role in the basic pathophysiology of ischemia/reperfusion (I/R) injury. The aim of this study was to investigate and compare the protective effects of three sulfide-based antioxidants, N-acetylcysteine (NAC), erdosteine (ERD), and alpha-lipoic acid (LA), on I/R injury of the small intestine tissue. METHODS Forty male Sprague-Dawley rats weighing between 100-150 g were divided into five groups (n = 8 for each): control (sham operated), I/R, I/R + NAC, I/R + ERD, and I/R + LA. Intestinal ischemia was provided by occluding the superior mesenteric artery via a special microvascular clamp; ischemia for 30 min and reperfusion for 3 days were carried out. Ileal specimens were obtained to determine the tissue levels of malondialdehyde (MDA), protein carbonyl contents (PCO), superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities and histological changes. RESULTS The rats subjected to intestinal I/R exhibited an increase in tissue MDA and PCO; the levels could hardly be ameliorated in the treatment groups. SOD and GPx activities were significantly decreased in the I/R group, whereas their reduction was less expressed in the treatment groups. Additionally, the histopathological injury scores of the disulfide-treated groups were lower than those of the I/R group. CONCLUSION All of the sulfhydryl-containing antioxidants used in this study exhibited a significant role in attenuating intestinal I/R injury; however, the outcome of the LA-treated group was significantly marked than that of the others.
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Affiliation(s)
- Turan Tunc
- Department of Pediatrics, Gülhane Military Medical Academy, Ankara, Turkey
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Guven A, Tunc T, Topal T, Kul M, Korkmaz A, Gundogdu G, Onguru O, Ozturk H. α-Lipoic acid and ebselen prevent ischemia/reperfusion injury in the rat intestine. Surg Today 2008; 38:1029-35. [DOI: 10.1007/s00595-007-3752-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Accepted: 12/07/2007] [Indexed: 01/01/2023]
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Dudek M, Bednarski M, Bilska A, Iciek M, Sokołowska-Jezewicz M, Filipek B, Włodek L. The role of lipoic acid in prevention of nitroglycerin tolerance. Eur J Pharmacol 2008; 591:203-10. [PMID: 18616939 DOI: 10.1016/j.ejphar.2008.06.073] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Revised: 06/18/2008] [Accepted: 06/22/2008] [Indexed: 11/28/2022]
Abstract
Besides other organic nitrates, nitroglycerin (glyceryl trinitrate; GTN) has been used to treat acute heart failure particularly due to ischemic heart disease. However, one of serious clinical problems of the GTN therapy, particularly a long-standing medication, is hemodynamic tolerance to GTN, manifested by the decreased therapeutic efficacy of the drug. The most recent studies have suggested that mitochondrial lipoate/dihydrolipoate system-dependent aldehyde dehydrogenase-2 plays a key role in nitric oxide release from GTN. The aldehyde dehydrogenase-2 performs three enzymatic activities of dehydrogenase, esterase and reductase. The reductase activity is responsible for bioactivation of organic nitrates, such as GTN yielding nitrite and dinitrate (1,2-GDN/1,3-GDN, approximately 8:1). In view of a large contribution of dihydrolipoic acid to stabilization and regeneration of thiol groups, necessary for the reductase activity of aldehyde dehydrogenase-2, we conducted studies aimed to determine whether lipoic acid administration to rats is able to prevent GTN tolerance. The studies were conducted on 4 groups of animals: control saline-treated, model GTN-tolerant, GTN + lipoic acid-treated, lipoic acid alone-administered groups. On the 9th day of experiment animals were given i.v. therapeutic dose of GTN. We measured in all animals systolic and diastolic blood pressure before injection of therapeutic dose of GTN into the cadual vein and during 20 min thereafter. Levels of nitric oxide and reactive oxygen species and activities of glutathione peroxidase and superoxide dismutase were assayed in the aorta, plasma and heart of all animals. In addition, levels of malondialdehyde, and non-protein thiols, and activities of glutathione S-transferase and gamma-glutamyl transpeptidase were evaluated in the heart and plasma. The obtained results indicate that treatment of rats with a combination of lipoic acid and GTN can efficiently counteract GTN tolerance.
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Affiliation(s)
- Magdalena Dudek
- Laboratory of Pharmacological Screening, Jagiellonian University, Collegium Medicum, 9, Medyczna Street, PL 30-688 Kraków, Poland
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Bae EH, Lee KS, Lee J, Ma SK, Kim NH, Choi KC, Frøkiaer J, Nielsen S, Kim SY, Kim SZ, Kim SH, Kim SW. Effects of alpha-lipoic acid on ischemia-reperfusion-induced renal dysfunction in rats. Am J Physiol Renal Physiol 2007; 294:F272-80. [PMID: 18032550 DOI: 10.1152/ajprenal.00352.2007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We investigated whether alpha-lipoic acid (alpha-LA), an antioxidant, attenuates the ischemia-reperfusion (I/R)-induced dysregulation of these transporters. Both renal pedicles of male Sprague-Dawley rats were clamped for 40 min. alpha-LA (80 mg/kg) was administered intraperitoneally before and immediately after induction of ischemia. After 2 days, the expression of aquaporins (AQPs), sodium transporters, and nitric oxide synthases (NOS) was determined in the kidney by immunoblotting and immunohistochemistry. The expression of endothelin-1 (ET-1) mRNA was determined by real-time PCR. Activities of adenylyl cyclase and guanylyl cyclase were measured by stimulated generation of cAMP and cGMP, respectively. The expression of AQP1-3 as well as that of the alpha(1)-subunit of Na-K-ATPase, type 3 Na/H exchanger, Na-K-2Cl cotransporter, and Na-Cl cotransporter was markedly decreased in response to I/R. The expression of type VI adenylyl cyclase was decreased in I/R-injured rats, which was counteracted by the treatment of alpha-LA. AVP-stimulated cAMP generation was blunted in I/R rats and was then ameliorated by alpha-LA treatment. alpha-LA treatment attenuated the downregulation of AQPs and sodium transporters. The expression of endothelial NOS was decreased in I/R rats, which was prevented by alpha-LA. The cGMP generation in response to sodium nitroprusside was blunted in I/R rats, which was also significantly prevented by alpha-LA. The mRNA expression of ET-1 was increased, which was recovered to the control level by alpha-LA treatment. In conclusion, alpha-LA treatment prevents I/R-induced dysregulation of AQPs and sodium transporters in the kidney, possibly through preserving normal activities of local AVP/cAMP, nitric oxide/cGMP, and ET systems.
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Affiliation(s)
- Eun Hui Bae
- Department of Internal Medicine, Chonnam National University Medical School, Hakdong 8, Gwangju 501-757, Korea
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Ohkita M, Takaoka M, Matsumura Y. [Endothelin-1 production and its involvement in cardiovascular diseases]. YAKUGAKU ZASSHI 2007; 127:1319-29. [PMID: 17827914 DOI: 10.1248/yakushi.127.1319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Endothelin (ET) has been implicated in the pathogenesis of several cardiovascular disorders because of its powerful vasoconstrictor and growth-promoting properties. The ET family consists of three isoforms, ET-1, ET-2 and ET-3. ET-1 appears to be the predominant member of the family generated by vascular endothelial cells. In view of the multiple cardiovascular actions of ET-1, there has been much interest in its contribution to the pathophysiology of hypertension and arteriosclerosis. We have been investigating the roles of ET(A) and ET(B) receptors in ET-1-related cardiovascular diseases using subtype-selective ET receptor antagonists and ET(B) receptor-deficient animals. Our studies have demonstrated that ET-1 overproduction and ET(A)-mediated ET-1 actions seem to play a crucial role in the development of several types of hypertensive and post-ischemic diseases. On the other hand, ET-1 biosynthesis and release are regulated at the transcriptional level, and various endogenous substances are known to stimulate ET-1 gene expression by DNA binding of transcription factors. We and others have recently demonstrated that nuclear factor-kappaB (NF-kappaB), a transcription factor with a pivotal role in inducing genes involved in immune, inflammatory and stress responses, is responsible for endothelial ET-1 production. In in vivo studies, agents that can inhibit the NF-kappaB activation improved the development of ET-1-related cardiovascular diseases. Thus, NF-kappaB inhibition may be a pertinent treatment for ET-1 related diseases.
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Affiliation(s)
- Mamoru Ohkita
- Laboratory of Pathological and Molecular Pharmacology, Osaka University of Pharmaceutical Sciences, Nasahara, Takatsuki City, Japan
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Sehirli O, Sener E, Cetinel S, Yüksel M, Gedik N, Sener G. Alpha-lipoic acid protects against renal ischaemia-reperfusion injury in rats. Clin Exp Pharmacol Physiol 2007; 35:249-55. [PMID: 17941895 DOI: 10.1111/j.1440-1681.2007.04810.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
1. Oxygen free radicals are important components involved in the pathophysiological processes observed during ischaemia-reperfusion (I/R). The present study was designed to assess the possible protective effect of alpha-lipoic acid (ALA) on renal I/R injury. 2. Wistar albino rats were unilaterally nephrectomized and subjected to 45 min renal pedicle occlusion followed by 24 h reperfusion. Saline or ALA (100 mg/kg, i.p.) was administered 15 min prior to ischaemia and immediately before the reperfusion period. At the end of 24 h, rats were decapitated and trunk blood was collected. Creatinine, blood urea nitrogen (BUN) and lactate dehydrogenase (LDH) activity were measured in serum samples, whereas tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6, 8-hydroxydeoxyguanosine (8-OHdG) and total anti-oxidant capacity (AOC) were assayed in plasma samples. 3. Kidney samples were taken for the determination of tissue malondialdehyde (MDA) and glutathione (GSH) levels, as well as Na(+)/K(+)-ATPase and myeloperoxidase (MPO) activity. The formation of reactive oxygen species in renal tissue samples was monitored using a chemiluminescence (CL) technique with luminol and lucigenin probes. Oxidant-induced tissue fibrosis was determined by tissue collagen content and the extent of tissue injury was analysed microscopically. 4. Ischaemia-reperfusion caused a significant increases in blood creatinine, BUN, LDH, IL-1beta, IL-6, TNF-alpha and 8-OHdG, whereas AOC was decreased. In kidney samples from the I/R group, MDA, MPO, collagen and CL levels were found to be increased significantly; however, glutathione levels and Na(+)/K(+)-ATPase activity were decreased. Conversely, ALA treatment reversed all these biochemical indices, as well as histopathological alterations induced by I/R. 5. In conclusion, these data suggest that ALA reverses I/R-induced oxidant responses and improves microscopic damage and renal function. Thus, it seems likely that ALA protects kidney tissues by inhibiting neutrophil infiltration, balancing the oxidant-anti-oxidant status and regulating the generation of inflammatory mediators.
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Affiliation(s)
- Ozer Sehirli
- School of Pharmacy, Department of Pharmacology, Marmara University, Istanbul, Turkey
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Amudha G, Josephine A, Mythili Y, Sundarapandiyan R, Varalakshmi P. Therapeutic efficacy of dl-α-lipoic acid on cyclosporine A induced renal alterations. Eur J Pharmacol 2007; 571:209-14. [PMID: 17619014 DOI: 10.1016/j.ejphar.2007.05.047] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 05/29/2007] [Accepted: 05/30/2007] [Indexed: 10/23/2022]
Abstract
The present study was designed to evaluate the possible beneficial effect of lipoic acid in preventing the renal damage induced by cyclosporine A in rats. Male albino rats of Wistar strain were divided into four groups and treated as follows. Two groups received cyclosporine A by oral gavage (25 mg/kg/body weight) for 21 days to induce nephrotoxicity, one of which simultaneously received lipoic acid treatment (20 mg/kg body weight) for 21 days. A vehicle (olive oil) and a lipoic acid drug control were also included. Cyclosporine A induced renal damage was evident from the decreased activities of tissue marker enzymes (alkaline phosphatase, acid phosphatase, lactate dehydrogenase, aspartate transaminase and alanine transaminase) and decreased activities of ATPases (Na+, K+-ATPase, Ca2+-ATPase and Mg2+ ATPase). An apparent increase in the levels of serum constituents (urea, uric acid and creatinine) and urinary marker enzymes (N-acetyl-beta-D-glucosaminidase, beta-glucosidase, beta-galactosidase, cathepsin-D and gamma-glutamyl transpeptidase) along with significant decline in creatinine clearance were seen in the cyclosporine treated rats, which was reversed upon treatment with lipoic acid. Ultrastructural observations were also in agreement with the above abnormal changes. Lipoic acid effectively reverted these abnormal biochemical changes and minimized the morphological lesions in renal tissue. Hence, this study clearly exemplifies that lipoic acid might be an ideal choice against cyclosporine A induced cellular abnormalities.
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Affiliation(s)
- Ganapathy Amudha
- Department of Medical Biochemistry, Dr. ALM. Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai-600 113, India
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Bae EH, Lee J, Kim SW. Effects of antioxidant drugs in rats with acute renal injury. Electrolyte Blood Press 2007; 5:23-7. [PMID: 24459496 PMCID: PMC3894502 DOI: 10.5049/ebp.2007.5.1.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2007] [Accepted: 05/10/2007] [Indexed: 12/03/2022] Open
Abstract
Acute renal failure is mainly caused by ischemia/reperfusion (I/R) injury or nephrotoxic drugs, in which reactive oxygen species (ROS) may play an important role. Therefore, antioxidants are expected to decrease the vulnerability of renal injury associated with oxidative challenges. α-Lipoic acid (α-LA), potent antioxidant, could act as ROS scavengers, iron chelators and enzyme modulators. In rats with acute renal injury, dysregulation of aquaporin (AQP) water channels and sodium transporters has been noted. I/R injury or cisplatin induced marked down-regulation of AQP1, AQP2 and AQP3 water channels, and type-3 Na-H exchanger, Na,K-ATPase, and Na-K-2Cl cotransporters, in association with impairment of urinary concentration and tubular sodium reabsorption. Treatment with α-LA prevented the dysregulation of AQP channels and sodium transporters, along with improved urinary concentrating capability and renal sodium reabsorption.
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Affiliation(s)
- Eun Hui Bae
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Jongun Lee
- Department of Physiology, Chonnam National University Medical School, Gwangju, Korea
| | - Soo Wan Kim
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
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Dulundu E, Ozel Y, Topaloglu U, Sehirli O, Ercan F, Gedik N, Sener G. Alpha-lipoic acid protects against hepatic ischemia-reperfusion injury in rats. Pharmacology 2007; 79:163-70. [PMID: 17259747 DOI: 10.1159/000098953] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Accepted: 10/17/2006] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND AIM To evaluate the protective effect of alpha-lipoic acid in reducing oxidative damage after severe hepatic ischemia/reperfusion (IR) injury. METHODS Wistar albino rats were subjected to 45 min of hepatic ischemia, followed by 60 min reperfusion period. Lipoic acid (100 mg/kg i.p.) was administered 15 min prior to ischemia and immediately before reperfusion period. At the end of the reperfusion period aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH) activity, and cytokine, TNF-alpha and IL-1beta levels were determined in serum samples. Malondialdehyde (MDA), and glutathione (GSH) levels and myeloperoxidase (MPO) activity were determined in the liver tissue samples while formation of reactive oxygen species was monitored by using chemiluminescence (CL) technique with luminol and lucigenin probes. Tissues were also analyzed histologically. RESULTS Serum ALT, AST, and LDH activities and TNF-alpha and IL-1beta levels were elevated in the I/R group, while this increase was significantly lower in the group of animals treated concomitantly with lipoic acid. Hepatic GSH levels, significantly depressed by I/R, were elevated back to control levels in lipoic acid-treated I/R group. Furthermore, increases in tissue luminol and lucigenin CL, MDA levels and MPO activity due to I/R injury were reduced back to control levels with lipoic acid treatment. CONCLUSION Since lipoic acid administration alleviated the I/R-induced liver injury and improved the hepatic structure and function, it seems likely that lipoic acid with its antioxidant and oxidant-scavenging properties may be of potential therapeutic value in protecting the liver against oxidative injury due to ischemia-reperfusion.
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Affiliation(s)
- Ender Dulundu
- Department of 5th Surgery, Haydarpasa Numune Educational and Research Hospital, Istanbul, Turkey
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Kurata H, Fujii T, Tsutsui H, Katayama T, Ohkita M, Takaoka M, Tsuruoka N, Kiso Y, Ohno Y, Fujisawa Y, Shokoji T, Nishiyama A, Abe Y, Matsumura Y. Renoprotective Effects of l-Carnosine on Ischemia/Reperfusion-Induced Renal Injury in Rats. J Pharmacol Exp Ther 2006; 319:640-7. [PMID: 16916994 DOI: 10.1124/jpet.106.110122] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We examined the renoprotective effects of l-carnosine (beta-alanyl-l-histidine) on ischemia/reperfusion (I/R)-induced acute renal failure (ARF) in rats. Ischemic ARF was induced by occlusion of the left renal artery and vein for 45 min followed by reperfusion, 2 weeks after contralateral nephrectomy. In vehicle (0.9% saline)-treated rats, renal sympathetic nerve activity (RSNA) was significantly augmented during the renal ischemia, and renal function was markedly decreased at 24 h after reperfusion. Intracerebroventricular injection of l-carnosine (1.5 and 5 pmol/rat) to ischemic ARF rats dose-dependently suppressed the augmented RSNA during ischemia and the renal injury at 24 h after reperfusion. N-alpha-Acetyl-l-carnosine [N-acetyl-beta-alanyl-l-histidine; 5 pmol/rat intracerebroventricular (i.c.v.)], which is resistant to enzymatic hydrolysis by carnosinase, did not affect the renal injury, and l-histidine (5 pmol/rat i.c.v.), a metabolite cleaved from l-carnosine by carnosinase, ameliorated the I/R-induced renal injury. Furthermore, a selective histamine H(3) receptor antagonist, thioperamide (30 nmol/rat i.c.v.) eliminated the preventing effects by l-carnosine (15 nmol/rat intravenously) on ischemic ARF. In contrast, a selective H(3) receptor agonist, R-alpha-methylhistamine (5 pmol/rat i.c.v.), prevented the I/R-induced renal injury as well as l-carnosine (5 pmol/rat) did. These results indicate that l-carnosine prevents the development of I/R-induced renal injury, and the effect is accompanied by suppressing the enhanced RSNA during ischemia. In addition, the present findings suggest that the renoprotective effect of l-carnosine on ischemic ARF is induced by its conversion to l-histidine and l-histamine and is mediated through the activation of histamine H(3) receptors in the central nervous system.
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Affiliation(s)
- Hayato Kurata
- Department of Pharmacology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
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Celik I, Cihangiroglu M, Ilhan N, Akpolat N, Akbulut HH. Protective Effects of Different Antioxidants and Amrinone on Vancomycin-Induced Nephrotoxicity. Basic Clin Pharmacol Toxicol 2005; 97:325-32. [PMID: 16236146 DOI: 10.1111/j.1742-7843.2005.pto_153.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We have studied the effects of three antioxidants and amrinone, an inotropic agent, against vancomycin-induced nephrotoxicity in rats by investigating renal function and morphology. Thirty adult female Sprague Dawley rats (168-234 g) were divided into six groups. A saline-treated group served as control. The other five groups were treated for 7 days with vancomycin alone or in combination with alpha-lipoic acid, Ginkgo biloba extract 761, melatonin or amrinone. On day 8, all the rats were sacrificed by decapitation, kidney tissues were excised immediately and blood and kidney samples were collected. Blood urea and creatinine, kidney tissue malondialdehyde levels, and kidney superoxide dismutase and glutathione (GSH) peroxidase activities were measured. The kidneys were also examined for histological changes. Vancomycin administration led to increased urea, creatinine and malondialdehyde levels and decreased superoxide dismutase and GSH peroxidase activities. Co-administration of alpha-lipoic acid, Ginkgo biloba extract, melatonin or amrinone with vancomycin prevented the increases in the urea, creatinine and melondialdehyde levels and also resulted in higher superoxide dismutase and GSH peroxidase activities. The antioxidants and AMR improved the renal pathology compared to rats treated with vancomycin alone (P<0.05). These results indicate that the three antioxidants and amrinone have potential protective effects against vancomycin-induced nephrotoxicity, which might in part be due to inhibition of free oxygen radical production. Amrinone was the most effective drug as judged on the basis of the pathological findings.
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Affiliation(s)
- Ilhami Celik
- Department of Clinical Microbiology and Infectious Diseases, Faculty of Medicine, Firat University, 23119 Elazig, Turkey.
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Kurata H, Takaoka M, Kubo Y, Katayama T, Tsutsui H, Takayama J, Ohkita M, Matsumura Y. Protective effect of nitric oxide on ischemia/reperfusion-induced renal injury and endothelin-1 overproduction. Eur J Pharmacol 2005; 517:232-9. [PMID: 15975571 DOI: 10.1016/j.ejphar.2005.05.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 05/18/2005] [Accepted: 05/24/2005] [Indexed: 11/23/2022]
Abstract
To elucidate the role of nitric oxide (NO) in the pathogenesis of ischemic acute renal failure, we examined the effects of (+/-)-(E)-4-ethyl-2-[(E)-hydroxyimino]-5-nitro-3-hexenamide (FK409) and N(G)-nitro-L-arginine methyl ester (L-NAME) as a NO donor and a non-selective NO synthase inhibitor on ischemia/reperfusion-induced renal injury and renal endothelin-1 content. Ischemic acute renal failure was induced by occlusion of the left renal artery and vein for 45 min followed by reperfusion, 2 weeks after contralateral nephrectomy. At 24 h after reperfusion, renal function in untreated acute renal failure rats markedly decreased and histological examination revealed severe renal damage. In addition, increases in renal endothelin-1 contents were evident in the acute renal failure rats at 2, 6, and 24 h after reperfusion, respectively. Pretreatment with FK409 (1 or 3 mg/kg, i.v.) attenuated ischemia/reperfusion-induced renal dysfunction, histological damage, and endothelin-1 overproduction after reperfusion. In contrast, pretreatment with L-NAME (1 or 10 mg/kg, i.v.) aggravated renal injuries of acute renal failure rats at 24 h after reperfusion, and the effect is accompanied by further increases in the renal endothelin-1 content at 2 and 6 h, but not at 24 h, after reperfusion. These results suggest that suppressive effects of NO on the renal endothelin-1 overproduction induced by ischemia/reperfusion in an early phase are probably responsible for the protective effect of NO against ischemic acute renal failure.
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Affiliation(s)
- Hayato Kurata
- Department of Pharmacology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
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Ohkita M, Nakajima A, Ueda K, Takaoka M, Kiso Y, Matsumura Y. Preventive Effect of Flavangenol on Ischemia/Reperfusion-Induced Acute Renal Failure in Rats. Biol Pharm Bull 2005; 28:1655-7. [PMID: 16141534 DOI: 10.1248/bpb.28.1655] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of flavangenol on ischemia/reperfusion-induced acute renal failure (ARF) in rats were examined. Ischemic ARF was induced by occlusion of the left renal artery and vein for 45 min followed by reperfusion, 2 weeks after contralateral nephrectomy. Renal functional parameters such as blood urea nitrogen, plasma creatinine, creatinine clearance, urine flow, urinary osmolality and fractional excretion of sodium were measured. Renal function in ARF rats markedly decreased at 1 d after reperfusion. Pre-ischemic treatment with flavangenol (3-30 mg/kg, i.v.) attenuated the ischemia/reperfusion-induced renal dysfunction. Histopathological examination of the kidney of ARF rats revealed severe renal damage, such as tubular necrosis and proteinaceous casts in tubuli, which were also significantly suppressed by the administration of flavangenol. These findings suggest that flavangenol supplementation may be a promising candidate for treatments to improve the ischemia/reperfusion-induced renal injury.
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Affiliation(s)
- Mamoru Ohkita
- Department of Pharmacology, Osaka University of Pharmaceutical Sciences, Osaka, Japan
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Antonello A, Hrelia P, Leonardi A, Marucci G, Rosini M, Tarozzi A, Tumiatti V, Melchiorre C. Design, Synthesis, and Biological Evaluation of Prazosin-Related Derivatives as Multipotent Compounds. J Med Chem 2004; 48:28-31. [PMID: 15633998 DOI: 10.1021/jm049153d] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
To combine in the same molecule alpha(1)-adrenoreceptor blocking and antioxidant properties, compounds 2-5 were designed and synthesized. All compounds were effective alpha(1)-adrenoreceptor antagonists and were tested in both functional and binding assays. In addition, compounds 2 and 5 also displayed significant capacity to inhibit intracellular oxidative stress, whereas 3-5 exerted potent antiproliferative activity in lymph node carcinoma of prostate cells.
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Affiliation(s)
- Alessandra Antonello
- Departments of Pharmaceutical Sciences, Alma Mater Studiorum, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
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Tylicki L, Rutkowski B, Hörl WH. Antioxidants: a possible role in kidney protection. Kidney Blood Press Res 2004; 26:303-14. [PMID: 14610334 DOI: 10.1159/000073936] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2003] [Indexed: 11/19/2022] Open
Abstract
Oxidative stress contributes to the pathophysiology of kidney injury. Beneficial renal effects of some medications, such as angiotensin-converting enzyme inhibitors, angiotensin II type 1 receptor antagonists, calcium channel blockers, beta-blockers and lipid lowering agents depend at least partially on the ability to alleviate oxidative stress. The administration of various natural or synthetic antioxidants has been shown to be of benefit in prevention and attenuation of renal scaring in numerous animal models of kidney diseases. These include vitamins, N-acetylcysteine, alpha-lipoic acid, melatonin, dietary flavonoids and phytoestrogens, and many others. Human studies are limited in this regard. Under certain conditions, surprisingly, the antioxidant supplements may exhibit pro-oxidant properties and even worsen renal damage. To date, the evidence is insufficient to recommend antioxidant supplements in patients with kidney disease. Prospective, controlled clinical trials on safety and effectiveness of different therapeutic antioxidant strategies are indispensable.
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Affiliation(s)
- Leszek Tylicki
- Department of Nephrology, Transplantology and Internal Medicine, Medical University, Gdansk, Poland.
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Fujii T, Takaoka M, Muraoka T, Kurata H, Tsuruoka N, Ono H, Kiso Y, Tanaka T, Matsumura Y. Preventive effect of L-carnosine on ischemia/reperfusion-induced acute renal failure in rats. Eur J Pharmacol 2003; 474:261-7. [PMID: 12921872 DOI: 10.1016/s0014-2999(03)02079-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We investigated the effect of L-carnosine (beta-alanyl-L-histidine) on ischemic acute renal failure in rats. Ischemic acute renal failure was induced by occlusion of the left renal artery and vein for 45 min followed by reperfusion, 2 weeks after contralateral nephrectomy. Renal function in untreated acute renal failure rats markedly decreased at 1 day after reperfusion. Pre-ischemic treatment with L-carnosine dose-dependently (1, 10 microg/kg, i.v.) attenuated the ischemia/reperfusion-induced renal dysfunction. Histopathological examination of the kidney of untreated acute renal failure rats revealed severe renal damage, which was significantly suppressed by pre-treatment with L-carnosine, at each dose given. In untreated acute renal failure rats, norepinephrine concentrations in renal venous plasma remarkably increased within 2 min after reperfusion and thereafter rapidly decreased. Pre-ischemic treatment with L-carnosine at a dose of 10 microg/kg significantly depressed the elevated norepinephrine level. On the other hand, although the higher dose of L-carnosine given 5 min after reperfusion tended to ameliorate the renal dysfunction after reperfusion, the improvement was moderate compared with those seen in pre-ischemic treatment. These results indicate that L-carnosine prevents the development of ischemia/reperfusion-induced renal injury, and the effect is accompanied by suppression of the enhanced norepinephrine release in the kidney immediately after reperfusion. Thus, the preventing effect of L-carnosine on ischemic acute renal failure is probably through the suppression of enhanced renal sympathetic nerve activity induced by ischemia/reperfusion.
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Affiliation(s)
- Toshihide Fujii
- Department of Pharmacology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, 569-1094 Osaka, Japan
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