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The potential role of ischaemia-reperfusion injury in chronic, relapsing diseases such as rheumatoid arthritis, Long COVID, and ME/CFS: evidence, mechanisms, and therapeutic implications. Biochem J 2022; 479:1653-1708. [PMID: 36043493 PMCID: PMC9484810 DOI: 10.1042/bcj20220154] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 02/07/2023]
Abstract
Ischaemia–reperfusion (I–R) injury, initiated via bursts of reactive oxygen species produced during the reoxygenation phase following hypoxia, is well known in a variety of acute circumstances. We argue here that I–R injury also underpins elements of the pathology of a variety of chronic, inflammatory diseases, including rheumatoid arthritis, ME/CFS and, our chief focus and most proximally, Long COVID. Ischaemia may be initiated via fibrin amyloid microclot blockage of capillaries, for instance as exercise is started; reperfusion is a necessary corollary when it finishes. We rehearse the mechanistic evidence for these occurrences here, in terms of their manifestation as oxidative stress, hyperinflammation, mast cell activation, the production of marker metabolites and related activities. Such microclot-based phenomena can explain both the breathlessness/fatigue and the post-exertional malaise that may be observed in these conditions, as well as many other observables. The recognition of these processes implies, mechanistically, that therapeutic benefit is potentially to be had from antioxidants, from anti-inflammatories, from iron chelators, and via suitable, safe fibrinolytics, and/or anti-clotting agents. We review the considerable existing evidence that is consistent with this, and with the biochemical mechanisms involved.
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Tumova S, Shi Y, Carr IM, Williamson G. Effects of quercetin and metabolites on uric acid biosynthesis and consequences for gene expression in the endothelium. Free Radic Biol Med 2021; 162:191-201. [PMID: 33091574 DOI: 10.1016/j.freeradbiomed.2020.10.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/12/2020] [Accepted: 10/16/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Uric acid, a metabolic product of purine degradation in humans, is a risk factor for developing gout and type 2 diabetes, and supplementation with quercetin lowers plasma uric acid in mildly hyperuricemic men. Here we examined the mechanism of inhibition of enzymes involved in uric acid metabolism by quercetin, conjugates and microbial catabolites, and measured the effect of lowered circulating uric acid on endothelial cell gene expression. METHODS Inhibition of adenosine deaminase (ADA), purine nucleoside phosphorylase (PNP) and xanthine oxidoreductase (XOR) activity by quercetin and metabolites was determined by HPLC. Human umbilical vein endothelial cells (HUVECs) were cultured under conditions mimicking blood flow, treated with uric acid (0, 300 or 500 μmol/L), and changes in gene expression measured using transcriptomics and quantitative droplet digital PCR. RESULTS In human plasma, no inhibition of PNP activity was observed, and only quercetin weakly inhibited ADA. XOR was not present at sufficient amount in human plasma to use for testing, but quercetin, quercetin-3'-sulfate and the gut microbial metabolite 3',4'-dihydroxyphenylacetic acid inhibited bovine milk XOR. Several changes were observed in gene expression in HUVECs under flow compared to static conditions, but after uric acid treatment, only very few changes were detected. CONCLUSIONS We propose that the main mechanism by which quercetin, as quercetin-3'-sulfate, lowers uric acid in vivo is through inhibition of XOR, and not ADA nor PNP. The pertinent shift in uric acid concentration was not sufficient to produce significant changes in endothelial gene expression in a cell model.
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Affiliation(s)
- Sarka Tumova
- University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Yuanlu Shi
- University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Ian M Carr
- University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Gary Williamson
- University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK; Department of Nutrition, Dietetics and Food, School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing and Health Sciences, Monash University, BASE Facility, 264 Ferntree Gully Road, Notting Hill, VIC, 3168, Australia.
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Li S, Li H, Xu X, Saw PE, Zhang L. Nanocarrier-mediated antioxidant delivery for liver diseases. Theranostics 2020; 10:1262-1280. [PMID: 31938064 PMCID: PMC6956819 DOI: 10.7150/thno.38834] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/30/2019] [Indexed: 12/12/2022] Open
Abstract
Liver is the principal detoxifying organ and metabolizes various compounds that produce free radicals (FR) constantly. To maintain the oxidative/antioxidative balance in the liver, antioxidants would scavenge FR by preventing tissue damage through FR formation, scavenging, or by enhancing their decomposition. The disruption of this balance therefore leads to oxidative stress and in turn leads to the onset of various diseases. Supplying the liver with exogeneous antioxidants is an effective way to recreate the oxidative/antioxidative balance in the liver homeostasis. Nevertheless, due to the short half-life and instability of antioxidants in circulation, the methodology for delivering antioxidants to the liver needs to be improved. Nanocarrier mediated delivery of antioxidants proved to be an ingenious way to safely and efficiently deliver a high payload of antioxidants into the liver for circumventing liver diseases. The objective of this review is to provide an overview of the role of reactive oxygen species (oxidant) and ROS scavengers (antioxidant) in liver diseases. Subsequently, current nanocarrier mediated antioxidant delivery methods for liver diseases are discussed.
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Affiliation(s)
- Senlin Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
| | - Huiru Li
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
| | - Xiaoding Xu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
| | - Phei Er Saw
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
| | - Lei Zhang
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
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Overexpression of farnesyl pyrophosphate synthase increases myocardial ischemia/reperfusion injury in mice. Gene 2018; 672:72-78. [DOI: 10.1016/j.gene.2018.05.116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/18/2018] [Accepted: 05/30/2018] [Indexed: 01/17/2023]
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Dai D, Yang J, Zhao C, Wu H, Ding J, Sun X, Hu S. Effect of Geranylgeranyl Pyrophosphate Synthase on Hypoxia/Reoxygenation-Induced Injury in Heart-Derived H9c2 Cells. Int Heart J 2018; 59:821-828. [DOI: 10.1536/ihj.17-218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Dongpu Dai
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Jian Yang
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Chenze Zhao
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Huandong Wu
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Jie Ding
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Xiaotong Sun
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
| | - Shenjiang Hu
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University
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Dai D, Wu H, Yang J, Shen S, Zhao C, Ding J, Hu S. Knock-down of farnesyl pyrophosphate synthase protects heart-derived H9c2 cells against hypoxia/reoxygenation-induced injury. Cell Biol Int 2017; 41:982-990. [PMID: 28544034 DOI: 10.1002/cbin.10795] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/19/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Dongpu Dai
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Huandong Wu
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Jian Yang
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Shizhen Shen
- College of Medicine; Zhejiang University; Hangzhou China
| | - Chenze Zhao
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Jie Ding
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Shenjiang Hu
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
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Zhu XQ, Li XM, Zhao YD, Ji XL, Wang YP, Fu YM, Wang HD, Lu DX, Qi RB. Effects of Senegenin against hypoxia/reoxygenation-induced injury in PC12 cells. Chin J Integr Med 2016; 22:353-61. [PMID: 26759162 DOI: 10.1007/s11655-015-2091-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To investigate the effect and the potential mechanism of Senegenin (Sen) against injury induced by hypoxia/reoxygenation (H/R) in highly differentiated PC12 cells. METHODS The cultured PC12 cells were treated with H/R in the presence or absence of Sen (60 μmol/L). Four groups were included in the experiment: control group, H/R group, H/R+Sen group and Sen group. Cell viability of each group and the level of lactate dehydrogenase (LDH) in culture medium were detected for the pharmacological effect of Sen. Hoechst 33258 staining and annexin V/propidium iodide double staining were used to analyze the apoptosis rate. Moreover, mitochondrial membrane potential (△Ψm), reactive oxygen species (ROS) and intracellular free calcium ([Ca(2+)]i) were measured by fluorescent staining and flow cytometry. Cleaved caspase-3 and activity of NADPH oxidase (NOX) were determined by colorimetric protease assay and enzyme linked immunosorbent assay, respectively. RESULTS Sen significantly elevated cell viability (P<0.05), decreased the leakage of LDH (P<0.05) and apoptosis rate (P<0.05) in H/R-injured PC12 cells. Sen maintained the value of △Ψm (P<0.05) and suppressed the activity of caspase-3 (P<0.05). Moreover, Sen reduced ROS accumulation P<0.05) and [Ca(2+)]i increment (P<0.05) by inhibiting the activity of NOX (P<0.05). CONCLUSION Sen may exert cytoprotection against H/R injury by decreasing the levels of intracellular ROS and [Ca(2+)]i, thereby suppressing the mitochondrial pathway of cellular apoptosis.
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Affiliation(s)
- Xiao-Qing Zhu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
- Clifford Hospital, Guangzhou University of Chinese Medicine, Guangzhou, 511496, China
| | - Xue-Min Li
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China
| | - Yan-Dong Zhao
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Xi-Luan Ji
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Yan-Ping Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Yong-Mei Fu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Hua-Dong Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Da-Xiang Lu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China
| | - Ren-Bin Qi
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, China.
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Xanthine Oxidoreductase-Derived Reactive Species: Physiological and Pathological Effects. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:3527579. [PMID: 26823950 PMCID: PMC4707389 DOI: 10.1155/2016/3527579] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 11/01/2015] [Indexed: 12/20/2022]
Abstract
Xanthine oxidoreductase (XOR) is the enzyme that catalyzes the oxidation of hypoxanthine to xanthine and xanthine to uric acid and is widely distributed among species. In addition to this housekeeping function, mammalian XOR is a physiological source of superoxide ion, hydrogen peroxide, and nitric oxide, which can function as second messengers in the activation of various pathways. This review intends to address the physiological and pathological roles of XOR-derived oxidant molecules. The cytocidal action of XOR products has been claimed in relation to tissue damage, in particular damage induced by hypoxia and ischemia. Attempts to exploit this activity to eliminate unwanted cells via the construction of conjugates have also been reported. Moreover, different aspects of XOR activity related to phlogosis, endothelial activation, leukocyte activation, and vascular tone regulation, have been taken into consideration. Finally, the positive and negative outcomes concerning cancer pathology have been analyzed because XOR products may induce mutagenesis, cell proliferation, and tumor progression, but they are also associated with apoptosis and cell differentiation. In conclusion, XOR activity generates free radicals and other oxidant reactive species that may result in either harmful or beneficial outcomes.
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Srinivasan PK, Yagi S, Nagai K, Afify M, Hata K, Uemoto S, Tolba RH. Impact of oxygen free radicals in rat partial liver transplantation. J Surg Res 2014; 191:469-75. [DOI: 10.1016/j.jss.2014.05.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/28/2014] [Accepted: 05/01/2014] [Indexed: 01/15/2023]
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10
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Pathophysiology of circulating xanthine oxidoreductase: New emerging roles for a multi-tasking enzyme. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1502-17. [DOI: 10.1016/j.bbadis.2014.05.022] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 02/07/2023]
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Antioxidant, free radical scavenging activities of Salvia brachyantha and its protective effect against oxidative cardiac cell injury. Food Chem Toxicol 2010; 48:846-53. [DOI: 10.1016/j.fct.2009.12.020] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 11/26/2009] [Accepted: 12/21/2009] [Indexed: 11/22/2022]
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12
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Vollmar B, Menger MD. The hepatic microcirculation: mechanistic contributions and therapeutic targets in liver injury and repair. Physiol Rev 2009; 89:1269-339. [PMID: 19789382 DOI: 10.1152/physrev.00027.2008] [Citation(s) in RCA: 352] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The complex functions of the liver in biosynthesis, metabolism, clearance, and host defense are tightly dependent on an adequate microcirculation. To guarantee hepatic homeostasis, this requires not only a sufficient nutritive perfusion and oxygen supply, but also a balanced vasomotor control and an appropriate cell-cell communication. Deteriorations of the hepatic homeostasis, as observed in ischemia/reperfusion, cold preservation and transplantation, septic organ failure, and hepatic resection-induced hyperperfusion, are associated with a high morbidity and mortality. During the last two decades, experimental studies have demonstrated that microcirculatory disorders are determinants for organ failure in these disease states. Disorders include 1) a dysregulation of the vasomotor control with a deterioration of the endothelin-nitric oxide balance, an arterial and sinusoidal constriction, and a shutdown of the microcirculation as well as 2) an overwhelming inflammatory response with microvascular leukocyte accumulation, platelet adherence, and Kupffer cell activation. Within the sequelae of events, proinflammatory mediators, such as reactive oxygen species and tumor necrosis factor-alpha, are the key players, causing the microvascular dysfunction and perfusion failure. This review covers the morphological and functional characterization of the hepatic microcirculation, the mechanistic contributions in surgical disease states, and the therapeutic targets to attenuate tissue injury and organ dysfunction. It also indicates future directions to translate the knowledge achieved from experimental studies into clinical practice. By this, the use of the recently introduced techniques to monitor the hepatic microcirculation in humans, such as near-infrared spectroscopy or orthogonal polarized spectral imaging, may allow an early initiation of treatment, which should benefit the final outcome of these critically ill patients.
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Affiliation(s)
- Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, Rostock, Germany.
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Kell DB. Iron behaving badly: inappropriate iron chelation as a major contributor to the aetiology of vascular and other progressive inflammatory and degenerative diseases. BMC Med Genomics 2009; 2:2. [PMID: 19133145 PMCID: PMC2672098 DOI: 10.1186/1755-8794-2-2] [Citation(s) in RCA: 364] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 01/08/2009] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The production of peroxide and superoxide is an inevitable consequence of aerobic metabolism, and while these particular 'reactive oxygen species' (ROSs) can exhibit a number of biological effects, they are not of themselves excessively reactive and thus they are not especially damaging at physiological concentrations. However, their reactions with poorly liganded iron species can lead to the catalytic production of the very reactive and dangerous hydroxyl radical, which is exceptionally damaging, and a major cause of chronic inflammation. REVIEW We review the considerable and wide-ranging evidence for the involvement of this combination of (su)peroxide and poorly liganded iron in a large number of physiological and indeed pathological processes and inflammatory disorders, especially those involving the progressive degradation of cellular and organismal performance. These diseases share a great many similarities and thus might be considered to have a common cause (i.e. iron-catalysed free radical and especially hydroxyl radical generation).The studies reviewed include those focused on a series of cardiovascular, metabolic and neurological diseases, where iron can be found at the sites of plaques and lesions, as well as studies showing the significance of iron to aging and longevity. The effective chelation of iron by natural or synthetic ligands is thus of major physiological (and potentially therapeutic) importance. As systems properties, we need to recognise that physiological observables have multiple molecular causes, and studying them in isolation leads to inconsistent patterns of apparent causality when it is the simultaneous combination of multiple factors that is responsible.This explains, for instance, the decidedly mixed effects of antioxidants that have been observed, since in some circumstances (especially the presence of poorly liganded iron) molecules that are nominally antioxidants can actually act as pro-oxidants. The reduction of redox stress thus requires suitable levels of both antioxidants and effective iron chelators. Some polyphenolic antioxidants may serve both roles.Understanding the exact speciation and liganding of iron in all its states is thus crucial to separating its various pro- and anti-inflammatory activities. Redox stress, innate immunity and pro- (and some anti-)inflammatory cytokines are linked in particular via signalling pathways involving NF-kappaB and p38, with the oxidative roles of iron here seemingly involved upstream of the IkappaB kinase (IKK) reaction. In a number of cases it is possible to identify mechanisms by which ROSs and poorly liganded iron act synergistically and autocatalytically, leading to 'runaway' reactions that are hard to control unless one tackles multiple sites of action simultaneously. Some molecules such as statins and erythropoietin, not traditionally associated with anti-inflammatory activity, do indeed have 'pleiotropic' anti-inflammatory effects that may be of benefit here. CONCLUSION Overall we argue, by synthesising a widely dispersed literature, that the role of poorly liganded iron has been rather underappreciated in the past, and that in combination with peroxide and superoxide its activity underpins the behaviour of a great many physiological processes that degrade over time. Understanding these requires an integrative, systems-level approach that may lead to novel therapeutic targets.
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Affiliation(s)
- Douglas B Kell
- School of Chemistry and Manchester Interdisciplinary Biocentre, The University of Manchester, 131 Princess St, Manchester, M1 7DN, UK.
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Abe Y, Hines IN, Zibari G, Pavlick K, Gray L, Kitagawa Y, Grisham MB. Mouse model of liver ischemia and reperfusion injury: method for studying reactive oxygen and nitrogen metabolites in vivo. Free Radic Biol Med 2009; 46:1-7. [PMID: 18955130 PMCID: PMC2740994 DOI: 10.1016/j.freeradbiomed.2008.09.029] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Revised: 09/10/2008] [Accepted: 09/16/2008] [Indexed: 11/29/2022]
Abstract
The mouse model of liver ischemia and reperfusion injury has proven to be valuable for our understanding of the role that reactive oxygen and nitrogen metabolites play in postischemic tissue injury. This methods paper provides a detailed protocol for inducing partial liver ischemia followed by reperfusion. Liver ischemia is induced in anesthetized mice by cross-clamping the hepatic artery and portal vein for varying lengths of time, resulting in deprivation of blood flow to approximately 70% of the liver. Restoration of blood flow to the ischemic lobes enhances superoxide production concomitant with a rapid and marked decrease in the bioavailability of nitric oxide, resulting in alterations in the redox state of the liver in favor of a more oxidative environment. This hepatocellular oxidative stress induces the activation of oxidant-sensitive transcription factors followed by the upregulation of proinflammatory cytokines and mediators that ultimately lead to liver injury. This model can be induced in any strain or sex of mouse and requires 1-2 months of practice to become proficient in the surgery and animal manipulation. The roles of various reactive metabolites of oxygen and nitrogen may be evaluated using genetically engineered mice as well as selective molecular, cellular, and/or pharmacological agents.
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Affiliation(s)
- Yuta Abe
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA 71130
| | - Ian N. Hines
- Department of Medicine, Division of Gastroenterology and Hepatology, MBRB 7336 Campus Box #7032, University of North Carolina, Chapel Hill, NC 27599
| | - Gazi Zibari
- Department of Surgery, LSU Health Sciences Center, Shreveport, LA 71130
| | - Kevin Pavlick
- Analgesics Team, East Coast Research and Early Development, Johnson & Johnson, Pharmaceutical Research and Development, Spring House, Penn 19477-0776
| | - Laura Gray
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA 71130
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo 160-8582 Japan
| | - Matthew B. Grisham
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA 71130
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Kim KW, Ha MJ, Jung KY, Kwak KH, Park SS, Lim DG. Reactive oxygen species and N-methyl-D-aspartate receptor-mediated central sensitization in hindlimb ischemia/reperfusion injury-induced neuropathic pain rats. Korean J Anesthesiol 2009; 56:186-194. [DOI: 10.4097/kjae.2009.56.2.186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
| | - Mi Jin Ha
- Department of Anesthesiology and Pain Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Kyung Young Jung
- Department of Anesthesiology and Pain Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Kyung Hwa Kwak
- Department of Anesthesiology and Pain Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Sung Sik Park
- Department of Anesthesiology and Pain Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Dong Gun Lim
- Department of Anesthesiology and Pain Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
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Bi W, Cai J, Xue P, Zhang Y, Liu S, Gao X, Li M, Wang Z, Baudy-Floc’h M, Green SA, Bi L. Protective effect of nitronyl nitroxide–amino acid conjugates on liver ischemia–reperfusion induced injury in rats. Bioorg Med Chem Lett 2008; 18:1788-94. [PMID: 18328700 DOI: 10.1016/j.bmcl.2008.02.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2007] [Revised: 02/08/2008] [Accepted: 02/13/2008] [Indexed: 01/23/2023]
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17
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Urakami H, Abe Y, Grisham MB. Role of reactive metabolites of oxygen and nitrogen in partial liver transplantation: lessons learned from reduced-size liver ischaemia and reperfusion injury. Clin Exp Pharmacol Physiol 2007; 34:912-9. [PMID: 17645640 DOI: 10.1111/j.1440-1681.2007.04640.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
1. Hepatic resection with concomitant periods of ischaemia and reperfusion (I/R) is required to perform reduced-size liver (RSL) transplantation procedures, such as living donor or split liver transplantation. Although a great deal of progress has been made using these types of surgical procedures, a significant number of patients develop tissue injury from these procedures, ultimately resulting in graft failure. 2. Because of this, there is a real need to understand the different mechanisms responsible for the tissue injury induced by I/R of RSL transplantation (RSL + I/R), with the ultimate goal to develop new and improved therapeutic agents that may limit the tissue damage incurred during RSL transplantation. 3. The present paper reviews the recent studies that have been performed examining the role of reactive metabolites of oxygen and nitrogen in a mouse model of RSL + I/R. In addition, we present data demonstrating how the pathophysiological mechanisms identified in this model compare with those observed in a model of RSL transplantation in rats.
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Affiliation(s)
- Hidejiro Urakami
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, Louisiana, USA
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Urakami H, Grisham MB. Divergent roles of superoxide and nitric oxide in reduced-size liver ischemia and reperfusion injury: Implications for partial liver transplantation. ACTA ACUST UNITED AC 2006; 13:183-93. [PMID: 16829061 DOI: 10.1016/j.pathophys.2006.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hepatic resection with concomitant periods of ischemia and reperfusion (I/R) are required to perform partial liver transplantation procedures such as split liver or living donor transplantation. Although great progress has been made using these types of surgeries, there remains substantial risk to both donors and recipients, with a significant number of patients developing liver injury and failure during the course these operations. Therefore, there is need to investigate the different mechanisms responsible for the tissue injury induced by ischemia and reperfusion of a reduced-size liver (RSL+I/R) with the ultimate objective of developing new therapeutic agents that may limit hepatocellular damage induced during partial liver transplantation. This review summarizes recent studies that have been performed in a mouse model of RSL+I/R. In addition, we present data demonstrating how the pathophysiological mechanisms identified in this model compare to those observed in a rat model of RSL transplantation.
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Affiliation(s)
- Hidejiro Urakami
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130, United States
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Cooper N, Khosravan R, Erdmann C, Fiene J, Lee JW. Quantification of uric acid, xanthine and hypoxanthine in human serum by HPLC for pharmacodynamic studies. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 837:1-10. [PMID: 16631418 DOI: 10.1016/j.jchromb.2006.02.060] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2005] [Revised: 02/27/2006] [Accepted: 02/28/2006] [Indexed: 11/20/2022]
Abstract
A simple HPLC method was developed and validated for the determination of uric acid (UA), xanthine (X) and hypoxanthine (HX) concentrations in human serum to support pharmacodynamic (PD) studies of a novel xanthine oxidase inhibitor during its clinical development. Serum proteins were removed by ultrafiltration. The hydrophilic analytes and the I.S. were eluted by 100% aqueous phosphate buffer mobile phase. The hydrophobic matrix components (late peaks) were eluted with a step gradient of a higher organic mobile phase. Validation on linearity, sensitivity, precision, accuracy, stability, and robustness of the method for PD biomarkers (UA, X, and HX) was carried out in a similar manner to that for pharmacokinetic (PK) data where applicable. Issues of selectivity for endogenous biomarker analytes and individual concentration variations were addressed during method validation. Standards were prepared in analyte-free phosphate buffer. Quality control samples were prepared in control serum from individuals not dosed with the xanthine oxidase inhibitor. The method was simple and robust with good accuracy and precision for the measurement of serum UA, X, and HX concentrations.
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Taniai H, Hines IN, Bharwani S, Maloney RE, Nimura Y, Gao B, Flores SC, McCord JM, Grisham MB, Aw TY. Susceptibility of murine periportal hepatocytes to hypoxia-reoxygenation: role for NO and Kupffer cell-derived oxidants. Hepatology 2004; 39:1544-52. [PMID: 15185295 DOI: 10.1002/hep.20217] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ischemia/reperfusion (I/R) is an important problem in liver resection and transplantation that is associated with hepatocellular dysfunction and injury. This study was designed to investigate whether a difference in hepatocyte susceptibility occurs in the periportal (PP) and/or perivenous (PV) zones in response to hypoxia/reoxygenation (H/R), and to delineate the mechanisms underlying this susceptibility. H/R was induced in an in situ perfused mouse liver model with deoxygenated Krebs-Henseleit buffer followed by oxygenated buffer. Selective destruction of PP or PV sites was achieved by digitonin perfusion into the portal or inferior vena cava, and was confirmed by histological evaluations and zone-specific enzymes. Hepatocellular injury was assessed by alanine aminotransferase (ALT) release. In whole liver, H/R significantly increased perfusate ALT. H/R of PP-enriched zones caused ALT release that was similar to that of whole liver (80 + 10 vs. 70 + 12 U/mg protein), consistent with significant PP hepatocyte injury. Minimal ALT release occurred in PV zones (10 + 5 U/mg protein). Administration of N-acetyl L-cysteine or a chimeric superoxide dismutase (SOD)-SOD2/3, a genetically engineered SOD-abrogated ALT release in H/R-perfused PP zones, implicating a role for superoxide (O(2) (-)). This elevated ALT release was attenuated by gadolinium chloride pretreatment, indicating that Kupffer cells are the O(2) (-) source. Enzymatic inhibition of cellular nitric oxide synthase (NOS) or genetic depletion of endothelial nitric oxide synthase (eNOS) aggravated hypoxia injury while exogenous NO and inducible nitric oxide synthase (iNOS) deficiency abolished reoxygenation injury. In conclusion, PP hepatocytes are more vulnerable to H/R; this injury is mediated directly or indirectly by Kupffer cell derived O(2) (-) and is limited by eNOS-derived NO.
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Affiliation(s)
- Hisashi Taniai
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
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Harada H, Hines IN, Flores S, Gao B, McCord J, Scheerens H, Grisham MB. Role of NADPH oxidase-derived superoxide in reduced size liver ischemia and reperfusion injury. Arch Biochem Biophys 2004; 423:103-8. [PMID: 14871473 DOI: 10.1016/j.abb.2003.08.035] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Revised: 08/28/2003] [Indexed: 11/17/2022]
Abstract
Hepatic resection with concomitant periods of ischemia and reperfusion (I/R) is required to perform reduced size liver transplantation such as split liver or liver donor transplantation. Although great progress has been made using these types of surgeries, there remains substantial risk to both donors and recipients, with a significant number of patients developing liver injury and failure. The objective of this study was to assess the roles of superoxide (O(2)(-)) and tumor necrosis factor-alpha (TNF-alpha) in the pathophysiology of a mouse model of reduced size liver combined with ischemia and reperfusion (RSL+I/R). We found that all male mice subjected to RSL+I/R died within 3-5 days following surgery. Mortality was always preceded by dramatic increases in liver injury and TNF-alpha expression in the absence of neutrophil infiltration. Using a long-lived, polycationic form of human manganese superoxide dismutase (pcMnSOD), NADPH oxidase-deficient mice (gp91(-/-)) or a monoclonal antibody directed against mouse TNF-alpha, we demonstrated that hepatocellular injury (and mortality) were significantly attenuated. In addition, we found that pcMnSOD administration or NADPH deficiency reduced expression of TNF-alpha. Taken together, our data suggest that NADPH oxidase-derived O(2)(-) plays an important role in the pathophysiology of RSL+I/R-induced liver injury via its ability to enhance expression of TNF-alpha. We propose that therapies directed toward scavenging of O(2)(-), inhibiting NADPH oxidase, and/or immuno-neutralizing TNF-alpha may prove useful in limiting the liver injury induced by surgical procedures that require resection and I/R such as split liver or living donor liver transplantation.
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Affiliation(s)
- Hirohisa Harada
- Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA 71130-3932, USA
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Riaz AA, Wang Y, Schramm R, Sato T, Menger MD, Jeppsson B, Thorlacius H. Role of angiotensin II in ischemia/reperfusion‐induced leukocyte‐endothelium interactions in the colon. FASEB J 2004; 18:881-3. [PMID: 15001561 DOI: 10.1096/fj.03-0502fje] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aims of the present study were to determine the effects and mechanisms of angiotensin II (Ang II) on leukocyte-endothelium interactions and the role of Ang II in a novel model of ischemia/reperfusion (I/R) in the mouse colon. Ang II dose-dependently increased leukocyte rolling and adhesion in colonic venules. Importantly, Ang II-induced leukocyte rolling was completely inhibited by immunoneutralization of P-selectin, and leukocyte adhesion was abolished in lymphocyte function antigen-1 (LFA-1)-deficient mice. The P-selectin-dependent rolling was found to be a precondition for the subsequent LFA-1-dependent leukocyte adhesion. Moreover, Ang II-induced leukocyte responses involved generation of reactive oxygen species and up-regulation of CXC chemokines. Notably, CXC chemokines, but not Ang II, stimulated leukocyte chemotaxis in vitro. I/R increased gene expression of angiotensin converting enzyme (ACE) in the colon and plasma concentrations of Ang II. Inhibition of ACE and the type 1 angiotensin (AT1) receptor significantly decreased the I/R-induced leukocyte adhesion. Taken together, these novel findings demonstrate that Ang II exerts potent pro-inflammatory effects in the colonic microcirculation and that inhibition of Ang II expression or function protects against I/R-induced leukocyte responses in the colon. Thus, it is suggested that Ang II is a major target to control pathological inflammation in the colon.
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Affiliation(s)
- Amjid A Riaz
- Department of Surgery, Malmö University Hospital, Lund University, Malmö, Sweden
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Hines IN, Hoffman JM, Scheerens H, Day BJ, Harada H, Pavlick KP, Bharwani S, Wolf R, Gao B, Flores S, McCord JM, Grisham MB. Regulation of postischemic liver injury following different durations of ischemia. Am J Physiol Gastrointest Liver Physiol 2003; 284:G536-45. [PMID: 12444015 DOI: 10.1152/ajpgi.00400.2002] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The objective of this study was to define the relationship among Kupffer cells, O(2)(-) production, and TNF-alpha expression in the pathophysiology of postischemic liver injury following short and long periods of ischemia. Using different forms of superoxide dismutase with varying circulating half-lives, a monoclonal antibody directed against mouse TNF-alpha, and NADPH oxidase-deficient mice, we found that 45 or 90 min of partial (70%) liver ischemia and 6 h of reperfusion (I/R) produced time-dependent increases in liver injury and TNF-alpha expression in the absence of neutrophil infiltration. Furthermore, we observed that hepatocellular injury induced by short periods of ischemia were not dependent on formation of TNF-alpha but were dependent on Kupffer cells and NADPH oxidase-independent production of O(2)(-). However, liver injury induced by extended periods of ischemia appeared to require the presence of Kupffer cells, NADPH oxidase-derived O(2)(-), and TNF-alpha expression. We conclude that the sources for O(2)(-) formation and the relative importance of TNF-alpha in the pathophysiology of I/R-induced hepatocellular injury differ depending on the duration of ischemia.
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Affiliation(s)
- Ian N Hines
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130, USA
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Hines IN, Kawachi S, Harada H, Pavlick KP, Hoffman JM, Bharwani S, Wolf RE, Grisham MB. Role of nitric oxide in liver ischemia and reperfusion injury. Mol Cell Biochem 2003. [PMID: 12162439 DOI: 10.1023/a:1015952926016] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The present study was designed to assess the role of endothelial cell and inducible nitric oxide synthase (eNOS, iNOS)-derived NO in ischemia/reperfusion (I/R)-induced pro-inflammatory cytokine expression and tissue injury in a murine model of hepatic I/R. Forty-five min of partial hepatic ischemia and 3 h of reperfusion resulted in a significant increase in liver injury as assessed by serum alanine aminotransferase and histopathology which occurred in the absence of neutrophil infiltration. Both iNOS and eNOS deficient mice exhibited enhanced liver injury when compared to their wild type (wt) controls again in the absence of neutrophil infiltration. Interestingly, message expression for both tumor necrosis factor-alpha (TNF-alpha) and interleukin 12 (IL-12) were enhanced in eNOS, but not iNOS-deficient mice at 1 h post-ischemia when compared to their wt controls. In addition, eNOS message expression appeared to be up-regulated between 1 and 3 h ofreperfusion in wt mice while iNOS deficient mice exhibited substantial increases at I but not 3 h. Taken together, these data demonstrate the ability of eNOS and iNOS to protect the post-ischemic liver, however their mechanisms of action may be very different.
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Affiliation(s)
- Ian N Hines
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA 71130, USA
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Riaz AA, Wan MX, Schäfer T, Dawson P, Menger MD, Jeppsson B, Thorlacius H. Allopurinol and superoxide dismutase protect against leucocyte-endothelium interactions in a novel model of colonic ischaemia-reperfusion. Br J Surg 2002; 89:1572-80. [PMID: 12445069 DOI: 10.1046/j.1365-2168.2002.02279.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Leucocyte recruitment is a key feature in ischaemia-reperfusion (I/R)-triggered tissue injury. However, the mechanisms underlying leucocyte-endothelium interactions in the large bowel remain elusive because of a previous lack of models to examine the colonic microcirculation. The aim of this study was to develop and validate a novel method for studying reperfusion-induced leucocyte-endothelium interactions in the colon. METHODS The superior mesenteric artery was occluded for 30 min in male C57/Bl6 mice and leucocyte responses were analysed in colonic venules after 30-240 min of reperfusion. Analysis of leucocyte rolling and adhesion in colonic venules was made possible by an inverted approach using intravital fluorescence microscopy. RESULTS Thirty minutes of ischaemia and 120 min of reperfusion induced the strongest and most reproducible increase in leucocyte rolling and adhesion. This was associated with a significant increase in colonic levels of malondialdehyde (MDA). Administration of allopurinol and superoxide dismutase reduced I/R-induced leucocyte responses in a dose-dependent manner. Pretreatment with allopurinol attenuated the tissue content MDA in the colon by more than 60 per cent. CONCLUSION A new method for examining I/R-induced leucocyte responses in the colonic microcirculation is described. Oxygen free radicals play an important role in triggering leucocyte rolling and adhesion in colonic venules.
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Affiliation(s)
- A A Riaz
- Department of Surgery, Malmö University Hospital, Lund University, Malmö, Sweden, Imperial College School of Medicine, Hammersmith Hospital, London, UK
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Fernández L, Heredia N, Grande L, Gómez G, Rimola A, Marco A, Gelpí E, Roselló-Catafau J, Peralta C. Preconditioning protects liver and lung damage in rat liver transplantation: role of xanthine/xanthine oxidase. Hepatology 2002; 36:562-72. [PMID: 12198648 DOI: 10.1053/jhep.2002.34616] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
This study was designed to evaluate whether ischemic preconditioning could confer protection against liver and lung damage associated with liver transplantation. The effect of preconditioning on the xanthine/xanthine oxidase (XOD) system in liver grafts subjected to 8 and 16 hours of cold ischemia was also evaluated. Increased xanthine levels and marked conversion of xanthine dehydrogenase (XDH) to XOD were observed after hepatic cold ischemia. Xanthine/XOD could play a role in the liver and lung damage associated with liver transplantation. This assumption is based on the observation that inhibition of XOD reduced postischemic reactive oxygen species (ROS) generation and hepatic injury as well as ensuing lung inflammatory damage, including neutrophil accumulation, oxidative stress, and edema formation. Ischemic preconditioning reduced xanthine accumulation and conversion of XDH to XOD in liver grafts during cold ischemia. This could diminish liver and lung damage following liver transplantation. In the liver, preconditioning prevented postischemic ROS generation and hepatic injury as well as the injurious effects in the lung following liver transplantation. Administration of xanthine and XOD to preconditioned rats led to hepatic ROS and transaminase levels similar to those found after reperfusion and abolished the protective effect of preconditioning on the lung inflammatory damage. In conclusion, ischemic preconditioning reduces both liver and lung damage following liver transplantation. This endogenous protective mechanism is capable of blocking xanthine/XOD generation in liver grafts during cold ischemia.
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Affiliation(s)
- Leticia Fernández
- Department of Experimental Pathology, Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
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Abstract
OBJECTIVES The aim of this study was to investigate the level and the form of xanthine oxidoreductase (XOR) in severely diseased human livers, to ascertain whether the modifications of the enzyme activity reported in experimental pathology also occur in human liver disease. METHODS Total, dehydrogenase, and oxidase activities of XOR were measured in samples of human liver removed for transplantation or partial hepatectomy. Samples included four groups: 1) histologically normal liver tissue, adjacent to metastases from extrahepatic tumors (controls), 2) liver with virus-related cirrhosis; 3) liver with virus-negative cirrhosis, and 4) hepatocellular carcinoma tissue (HCC). RESULTS The level of total XOR was significantly higher in liver with virus-related cirrhosis, but not in virus-negative cirrhosis, than in controls. In virus-positive cirrhosis, the total XOR activity correlated positively with the level of ALT. The percentage of XOR oxidase activity in cirrhotic liver, regardless of virus infection, correlated positively with aspartate amino-transferase, bilirubin concentration, and partial thromboplastin time, and negatively with prothrombin time. The activity of XOR was significantly lower in HCC than in control tissue or in a nonneoplastic area of the same liver. CONCLUSIONS Consistent with previous reports in experimental pathology, the level of XOR was increased in cirrhotic liver, in association with viral infection. This increment correlated with ALT, suggesting a relationship between XOR activity and the extent of liver injury caused by viral replication. The percentage of oxidase activity seems to be correlated with tissue damage and consequent liver impairment. The low XOR activity observed in HCC is consistent with reported experimental pathology.
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Affiliation(s)
- Fiorenzo Stirpe
- Department of Experimental Pathology, University of Bologna, Italy
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Ishikawa H, Jin MB, Ogata T, Taniguchi M, Suzuki T, Shimamura T, Magata S, Horiuchi H, Ogata K, Masuko H, Fujita M, Furukawa H, Todo S. Role of cyclic nucleotides in ischemia and reperfusion injury of canine livers. Transplantation 2002; 73:1041-8. [PMID: 11965029 DOI: 10.1097/00007890-200204150-00005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND In a series of canine liver ischemia experiments, we have shown that amelioration of hepatic injury is achievable by the inhibition of vasoconstriction, cytokine production, platelet aggregation, and neutrophil infiltration. Cyclic adenosine diphosphate (cAMP) was considered to be involved in most of these events. In our study, we tested our hypothesis that augmentation of endogenous cAMP by phosphodiesterase (PDE) 3 inhibitor, amrinone (AM), or adenylate cyclase stimulator, NKH477 (NKH), could attenuate ischemia and reperfusion injury of the liver. METHODS Thirty-six beagle dogs were used. They were divided into group CT (untreated control), group AM, group NKH, and group CB (treated by both agents). AM or NKH were administered i.v. 1 hr before ischemia (group preAM and group preNKH) or 15 min before reperfusion (pos-AM and postNKH). Combination group animals were treated only before ischemia. Animal survival, hepatic tissue blood flow, liver enzymes, platelet counts, energy metabolism, hepatic cAMP and cyclic guanosine 3',5'-cyclic monophosphate levels, and histopathology were analyzed. RESULTS Two-week animal survival was significantly improved by pre- or posttreatment with either agent. After reperfusion, hepatic tissue blood flow, liver enzyme release, platelet counts, energy metabolism, tissue cAMP levels, and histological architecture were also ameliorated markedly. Combination of both agents induced severe liver damage and lethal hypotension. AM treatment exhibited more protective effects than NKH, particularly when it was given before ischemia. Interestingly, not only cyclic guanosine 3',5'-cyclic monophosphate, were also restored at higher levels after reperfusion by preischemia treatment. CONCLUSIONS Administration of amrinone or NKH477 maintained hepatic tissue concentrations of cyclic nucleotides, and attenuated ischemia and reperfusion injury of the liver. Thus, regulation of hepatic tissue cyclic nucleotides is an important alternative for prevention of hepatic damage in liver preservation and surgery.
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Affiliation(s)
- Hiroto Ishikawa
- First Department of Surgery, Hokkaido University School of Medicine, Sapporo, Japan
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Battelli MG, Musiani S, Tazzari PL, Stirpe F. Oxidative stress to human lymphocytes by xanthine oxidoreductase activity. Free Radic Res 2001; 35:665-79. [PMID: 11811520 DOI: 10.1080/10715760100301191] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The in vitro toxicity of the reactive oxygen species generating enzyme xanthine oxidoreductase (XOR) to human peripheral blood lymphocytes was studied after stimulation with phytohaemoagglutinin or anti-CD3/CD28 antibodies. Apoptosis and necrosis were induced by the XOR/hypoxanthine system in a time- and concentration-dependent manner. CD8+ lymphocytes showed a higher sensitivity than CD4+ cells to the XOR/hypoxanthine system. The occurrence of apoptosis was demonstrated by annexin-V binding to injured cell membrane, which was the most precocious alteration observed, followed by the increment of transglutaminase activity, which was significant at the lowest XOR concentration used. Nuclear damage was assessed by the increased hypodiploid nuclei and by DNA migration on gel electrophoresis, which turned to an apoptotic pattern before the occurrence of cell membrane necrotic lesions. Apoptosis was induced by XOR activity proportionally to substrate concentration and was prevented by the competitive enzyme inhibitor, allopurinol. The hydrogen peroxide scavenging enzyme, catalase, gave a higher protection than superoxide dismutase from the toxicity caused by the XOR/hypoxanthine system. Necrosis occurs in a variable percentage indicating that reactive oxygen species may trigger both apoptosis and necrosis in proliferating human lymphocytes, mostly depending on XOR concentration.
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Affiliation(s)
- M G Battelli
- University of Bologna, Department of Experimental Pathology, Italy.
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Battelli MG, Musiani S, Valgimigli M, Gramantieri L, Tomassoni F, Bolondi L, Stirpe F. Serum xanthine oxidase in human liver disease. Am J Gastroenterol 2001; 96:1194-9. [PMID: 11316169 DOI: 10.1111/j.1572-0241.2001.03700.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES High concentrations of serum xanthine oxidase (XO) have been reported during human liver disease and hepatocyte injury in experimental settings. However, it is unclear whether this elevation reflects hepatocyte necrosis or has a different meaning. METHODS The serum level of XO in 64 patients with chronic liver disease (17 patients with cirrhosis, 30 with chronic hepatitis, and 17 with cholestatic disorders) and in 12 control subjects was determined by a competitive ELISA. Conventional serum markers of liver damage were assessed in all patients, and grading and staging were scored in the chronic hepatitis group according to Knodell. RESULTS The XO serum levels were significantly higher in the patients than in the controls. The differences were also significant when controls were compared to patients with chronic hepatitis and cholestatic disorders separately, but not when compared to the cirrhosis group. Patients with cholestatic disorders had XO values higher than those of patients with cirrhosis or chronic hepatitis. XO levels did not correlate with stage and grade in chronic hepatitis group. We found a weak but significant positive correlation in patients between XO serum level and gamma-glutamyl transpeptidase (r = 0.37). This correlation was stronger when chronic hepatitis (r = 0.42) and, especially cholestatic disorders (r = 0.71), were separately tested, but was absent in the cirrhosis group. The XO values positively correlated with alkaline phosphatase in patients with cholestatic disorders. A level of serum XO >32 microg/ml specifically identified cholestatic disorders in our study population. CONCLUSIONS A marked elevation of serum XO in patients with chronic liver disease seems to reflect the presence of cholestasis. No correlation between XO levels and histological or serum evidence of hepatocyte necrosis was found in these patients.
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Affiliation(s)
- M G Battelli
- Department of Experimental Pathology, S. Orsola Hospital, University of Bologna, Italy
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Martí R, Varela E, Pascual C, Segura RM. Determination of xanthine oxidoreductase forms: influence of reaction conditions. Clin Chim Acta 2001; 303:117-25. [PMID: 11163031 DOI: 10.1016/s0009-8981(00)00390-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Xanthine oxidoreductase (XOR) has been implicated in ischaemia-reperfusion injury, and increases in this enzyme have been found in plasma of patients with different illnesses. The catalytic concentrations of the XOR forms found in plasma, using various reaction conditions, greatly differ in the related literature. We studied the effect of the assay conditions on the xanthine oxidation rate catalysed by the XOR forms. Our results demonstrate inhibition of XOR by the reaction products and a time-dependent decrease in the reaction rates of XOR forms. Substrate consumption and inhibition by the products did not account for this decrease. Determination at 60 min incubation leads to catalytic concentrations up to 80% lower for the XOR forms than those obtained at 10 min. We conclude that elimination of the reaction products (NADH, H(2)O(2) and O(2)) from the reaction mixture, and short incubation times, are necessary for accurate measurement of the XOR activities.
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Affiliation(s)
- R Martí
- Servei de Bioquímica, Hospital General Universitari Vall d'Hebron, 119-129, 08035 Barcelona, Spain
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Kawachi S, Hines IN, Laroux FS, Hoffman J, Bharwani S, Gray L, Leffer D, Grisham MB. Nitric oxide synthase and postischemic liver injury. Biochem Biophys Res Commun 2000; 276:851-4. [PMID: 11027558 DOI: 10.1006/bbrc.2000.3559] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The objective of this study was to determine what roles the endothelial cell and inducible isoforms of nitric oxide synthase (eNOS, iNOS) play in ischemia and reperfusion (I/R)-induced liver injury in vivo in mice genetically deficient in each isoform of NOS. We found that 45 min of partial (70%) liver ischemia and 5 h of reperfusion induced substantial liver injury as assessed by the release of large and significant amounts of the liver-specific enzyme alanine aminotransferase (ALT) into the serum of wild-type (wt) mice. The enhanced ALT levels were not due to increased recruitment of potentially damaging PMNs, which could mediate hepatocyte injury, as neither histopathological inspection nor quantitative MPO determinations revealed the presence of PMNs in the liver at this time point. In addition, we observed a significant enhancement in liver injury in eNOS-deficient but not iNOS-deficient mice subjected to liver I/R compared to postischemic wt mice. Taken together, these data suggest that eNOS- but not iNOS-derived NO plays an important role in limiting or downregulating I/R-induced liver injury in vivo following 5 h of reperfusion.
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Affiliation(s)
- S Kawachi
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, Louisiana, 71130, USA
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Ozaki M, Deshpande SS, Angkeow P, Bellan J, Lowenstein CJ, Dinauer MC, Goldschmidt-Clermont PJ, Irani K. Inhibition of the Rac1 GTPase protects against nonlethal ischemia/reperfusion-induced necrosis and apoptosis in vivo. FASEB J 2000; 14:418-29. [PMID: 10657998 DOI: 10.1096/fasebj.14.2.418] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reperfusion of ischemic tissue results in the generation of reactive oxygen species that contribute to tissue injury. The sources of reactive oxygen species in reperfused tissue are not fully characterized. We hypothesized that the small GTPase Rac1 mediates the oxidative burst in reperfused tissue and thereby contributes to reperfusion injury. In an in vivo model of mouse hepatic ischemia/reperfusion injury, recombinant adenoviral expression of a dominant negative Rac1 (Rac1N17) completely suppressed the ischemia/reperfusion-induced production of reactive oxygen species and lipid peroxides, activation of nuclear factor-kappa B, and resulted in a significant reduction of acute liver necrosis. Expression of Rac1N17 also suppressed ischemia/reperfusion-induced acute apoptosis. The protection offered by Rac1N17 was also evident in knockout mice deficient for the gp91phox component of the phagocyte NADPH oxidase. This work demonstrates the crucial role of a Rac1-regulated oxidase in mediating the production of injurious reactive oxygen species, which contribute to acute necrotic and apoptotic cell death induced by ischemia/reperfusion in vivo. Targeted inhibition of this oxidase, which is distinct from the phagocyte NADPH oxidase, should provide a new avenue for in vivo therapy aimed at protecting organs at risk from ischemia/reperfusion injury.-Ozaki, M., Deshpande, S. S., Angkeow, P., Bellan, J., Lowenstein, C. J., Dinauer, M. C., Goldschmidt-Clermont, P. J., Irani, K. Inhibition of the Rac1 GTPase protects against nonlethal ischemia/reperfusion-induced necrosis and apoptosis in vivo.
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Affiliation(s)
- M Ozaki
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Kondo T, Terajima H, Todoroki T, Hirano T, Ito Y, Usia T, Messmer K. Prevention of hepatic ischemia-reperfusion injury by SOD-DIVEMA conjugate. J Surg Res 1999; 85:26-36. [PMID: 10383834 DOI: 10.1006/jsre.1999.5591] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A protective effect of the SOD (superoxide dismutase)-DIVEMA (divinyl ether and maleic anhydride) conjugate on I-R (ischemia-reperfusion) liver injury was demonstrated. Twenty minutes of normothermic hepatic ischemia was induced by clamping the portal triad of Sprague-Dawley rats. Five minutes before the end of ischemia, SOD, SOD-DIVEMA, or NaCl (0.9%) was given intravenously. Using intravital fluorescence microscopy, hepatic microvascular perfusion was analyzed before ischemia and repeatedly during the 120-min reperfusion period. SOD-DIVEMA significantly restored the sinusoidal perfusion rate (control, 98.0 +/- 0.5; NaCl, 65.5 +/- 7. 7; SOD, 81.5 +/- 8.2; SOD-DIVEMA, 95.8 +/- 0.7%) and reduced the number of leukocytes stagnant in acini (control, 4.4 +/- 0.9; NaCl, 36.6 +/- 6.3; SOD, 27.7 +/- 6.8; SOD-DIVEMA, 12.3 +/- 3.3 cells/lobule) and adherent in postsinusoidal venules (control, 55.0 +/- 24; NaCl, 417 +/- 63; SOD, 253 +/- 58; SOD-DIVEMA, 40.0 +/- 14 cells/mm2). In addition, SOD-DIVEMA maintained postischemic hepatocellular integrity. The SOD-DIVEMA-treated group revealed higher serum SOD enzyme activity compared to the SOD group after 120 min of reperfusion (SOD-DIVEMA, 33.0 +/- 5.9; SOD, 8.6 +/- 3.1 U/ml). The beneficial effect of SOD-DIVEMA was most prominent after 120 min of reperfusion, indicating a longer intravascular half-life of SOD-DIVEMA.
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Affiliation(s)
- T Kondo
- Institute for Surgical Research, Klinikum Grosshadern, University of Munich, Munich, D-81377, Germany
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Lehr HA, Vollmar B, Vajkoczy P, Menger MD. Intravital fluorescence microscopy for the study of leukocyte interaction with platelets and endothelial cells. Methods Enzymol 1999; 300:462-81. [PMID: 9919547 DOI: 10.1016/s0076-6879(99)00151-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- H A Lehr
- Institute of Pathology, Johannes Gutenberg University, Mainz
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Hernandez A, Light JA, Barhyte DY, Mabudian M, Gage F. Ablating the ischemia-reperfusion injury in non-heart-beating donor kidneys. Transplantation 1999; 67:200-6. [PMID: 10075581 DOI: 10.1097/00007890-199901270-00003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND The objective of this study was to determine if allopurinol (AL) and/or trifluoperazine (TFP) added to the Belzer machine preservation solution (MPS) improves the function of non-heart-beating donor (NHBD) canine kidneys. METHODS Anesthetized canines underwent bilateral dissection of the renal vessels, obtaining baseline flow. After removing one kidney (heart-beating donor [HBD]), the dog was exsanguinated. After remaining in situ for 120 min (30-min warm ischemia time, 90-min cold ischemia time), the second kidney was removed (NHBD), flushed, biopsied, and weighed. The kidneys were machine-perfused separately for 20 hr, and pressure, flow, and resistance were measured serially. The kidneys were randomly assigned to a perfusate group (G): G1=MPS, G2=MPS+TFP, G3=MPS+AL, and G4=MPS+TFP+AL. Kidneys were implanted separately into a single recipient dog. Flow, resistance, and urine output were measured serially for 4 hr. Blood and urine samples and kidney biopsies were then obtained. All measurements were standardized to 100 g of kidney weight. RESULTS HBD kidneys functioned better than NHBD kidneys in all groups, as expected. Although perfusate G1 was the most effective solution for HBD kidneys, the TFP additive (perfusate G2) more effectively reversed the vasospastic effects of ischemia/reperfusion for NHBD than the MPS solution (G1) with or without other additives. In HBD kidneys, the addition of AL resulted in the best creatinine clearance; however, AL was less effective than MPS alone in NHBD kidneys. TFP+AL together were completely ineffective in preserving renal function, regardless of whether the kidneys were from HBD or NHBD. CONCLUSIONS MPS+TFP more effectively protected renal function against reperfusion injury in the NHBD than MPS alone, AL, or AL+TFP. AL exerts a salutary effect on creatinine clearance in HBD but not in the NHBD. The TFP and AL combination should not be used together with the MPS in machine preservation of kidneys.
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Affiliation(s)
- A Hernandez
- Washington Hospital Center, Transplantation Services, Washington, DC 20010, USA
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Vollmar B, Menger MD. Assessment of microvascular oxygen supply and tissue oxygenation in hepatic ischemia/reperfusion. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1998; 428:403-8. [PMID: 9500078 DOI: 10.1007/978-1-4615-5399-1_58] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- B Vollmar
- Institute for Clinical and Experimental Surgery, University of Saarland, Homburg/Saar, Germany
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