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Chen KQ, Ke BY, Cheng L, Guan MT, Wang ZB, Wang SZ. Research and Progress of Probucol in Nonalcoholic Fatty Liver Disease. Mini Rev Med Chem 2023; 23:1905-1911. [PMID: 36967462 DOI: 10.2174/1389557523666230324092842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/08/2022] [Accepted: 12/08/2022] [Indexed: 03/29/2023]
Abstract
With the development of the social economy over the last 30 years, non-alcoholic fatty liver disease (NAFLD) is affected by unhealthy living habits and eating styles and has gradually become an increasingly serious public health problem. It is very important to investigate the pathogenesis and treatment of NAFLD for the development of human health. Probucol is an antioxidant with a bis-phenol structure. Although probucol is a clinically used cholesterol-lowering and antiatherosclerosis drug, its mechanism has not been elucidated in detail. This paper reviews the chemical structure, pharmacokinetics and pharmacological research of probucol. Meanwhile, this paper reviews the mechanism of probucol in NAFLD. We also analyzed and summarized the experimental models and clinical trials of probucol in NAFLD. Although current therapeutic strategies for NAFLD are not effective, we hope that through further research on probucol, we will be able to find suitable treatments to solve this problem in the future.
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Affiliation(s)
- Ke-Qian Chen
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
| | - Bo-Yi Ke
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
| | - Lu Cheng
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
| | - Meng-Ting Guan
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
| | - Zong-Bao Wang
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
| | - Shu-Zhi Wang
- Institute of Pharmacy and Pharmacology, School of Pharmaceutical Sciences, Hengyang Medical School, University of South China, Hengyang, 421001, China
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, 421001, China
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Suzuki S, Venkatesh D, Kanda H, Nakayama A, Hosokawa H, Lee E, Miki T, Stockwell BR, Yokote K, Tanaka T, Prives C. GLS2 Is a Tumor Suppressor and a Regulator of Ferroptosis in Hepatocellular Carcinoma. Cancer Res 2022; 82:3209-3222. [PMID: 35895807 PMCID: PMC11057045 DOI: 10.1158/0008-5472.can-21-3914] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 06/12/2022] [Accepted: 07/20/2022] [Indexed: 11/16/2022]
Abstract
Glutamine synthase 2 (GLS2) is a key regulator of glutaminolysis and has been previously implicated in activities consistent with tumor suppression. Here we generated Gls2 knockout (KO) mice that develop late-occurring B-cell lymphomas and hepatocellular carcinomas (HCC). Further, Gls2 KO mice subjected to the hepatocarcinogenic Stelic Animal Model (STAM) protocol produce larger HCC tumors than seen in wild-type (WT) mice. GLS2 has been shown to promote ferroptosis, a form of cell death characterized by iron-dependent accumulation of lipid peroxides. In line with this, GLS2 deficiency, either in cells derived from Gls2 KO mice or in human cancer cells depleted of GLS2, conferred significant resistance to ferroptosis. Mechanistically, GLS2, but not GLS1, increased lipid reactive oxygen species (ROS) production by facilitating the conversion of glutamate to α-ketoglutarate (αKG), thereby promoting ferroptosis. Ectopic expression of WT GLS2 in a human hepatic adenocarcinoma xenograft model significantly reduced tumor size; this effect was nullified by either expressing a catalytically inactive form of GLS2 or by blocking ferroptosis. Furthermore, analysis of cancer patient datasets supported a role for GLS2-mediated regulation of ferroptosis in human tumor suppression. These data suggest that GLS2 is a bona fide tumor suppressor and that its ability to favor ferroptosis by regulating glutaminolysis contributes to its tumor suppressive function. SIGNIFICANCE This study demonstrates that the key regulator of glutaminolysis, GLS2, can limit HCC in vivo by promoting ferroptosis through αKG-dependent lipid ROS, which in turn might lay the foundation for a novel therapeutic approach.
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Affiliation(s)
- Sawako Suzuki
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba University, Chiba, Japan
- Department of Diabetes, Metabolism and Endocrinology, Chiba University Hospital, Chiba, Japan
| | - Divya Venkatesh
- Department of Biological Sciences, Columbia University, New York, USA
| | - Hiroaki Kanda
- Department of Pathology, Saitama Cancer Center, Saitama, Japan
| | - Akitoshi Nakayama
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroyuki Hosokawa
- Department of Immunology, Tokai University School of Medicine, Kanagawa, Japan
| | - Eunyoung Lee
- Department of Medical Physiology, Chiba University, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takashi Miki
- Department of Medical Physiology, Chiba University, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Brent R. Stockwell
- Department of Biological Sciences, Columbia University, New York, USA
- Department of Chemistry, Columbia University, New York, USA
| | - Koutaro Yokote
- Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba University, Chiba, Japan
- Department of Diabetes, Metabolism and Endocrinology, Chiba University Hospital, Chiba, Japan
| | - Tomoaki Tanaka
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Carol Prives
- Department of Biological Sciences, Columbia University, New York, USA
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Zucoloto AZ, Manchope MF, Borghi SM, Dos Santos TS, Fattori V, Badaro-Garcia S, Camilios-Neto D, Casagrande R, Verri WA. Probucol Ameliorates Complete Freund's Adjuvant-Induced Hyperalgesia by Targeting Peripheral and Spinal Cord Inflammation. Inflammation 2020; 42:1474-1490. [PMID: 31011926 DOI: 10.1007/s10753-019-01011-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The effect of the lipid-lowering agent probucol in inflammatory hyperalgesia and leukocyte recruitment was evaluated in a model of subacute inflammation by Complete Freund's adjuvant (CFA). As CFA induces long-lasting nociception characterized by peripheral and spinal cord inflammation, the anti-inflammatory activity of probucol was assessed at both foci. Probucol at 0.3-3 mg/kg was administrated per oral daily starting 24 h after CFA intraplantar injection. Mechanical and thermal hyperalgesia induced by CFA were determined using an electronic anesthesiometer and hot plate apparatus, respectively. Post-treatment with probucol at 3 mg/kg inhibited CFA-induced hyperalgesia over the course of 7 days as well as paw edema. Overt pain-like behaviors, which were determined by the number of flinches and time spent licking paw immediately following CFA injection, were also reduced by probucol at 3 mg/kg administered as a pre-treatment. To investigate the mechanisms underlying the analgesic effect of probucol, neutrophil recruitment to paw was assessed by myeloperoxidase activity, cytokine production, Cox-2 expression, and NF-κB activation in both paw and spinal cord by ELISA. Iba-1, GFAP, and substance P protein expression and nuclear localization of phosphorylated NF-κB were evaluated in the spinal cord by immunofluorescence. Probucol at 3 mg/kg attenuated neutrophil recruitment, cytokine levels, and NF-κB activation as well microglia and astrocyte activation, and substance P staining in the spinal cord. Taken together, the results suggest that probucol exerts its analgesic and anti-inflammatory activity in an experimental model of persistent inflammation by targeting the NF-κB pathway in peripheral and spinal cord foci.
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Affiliation(s)
- Amanda Z Zucoloto
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil.,Snyder Institute for Chronic Diseases, University of Calgary, HRIC 4C51, 3230 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada.,Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, HRIC 4C51, 3230 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Marília F Manchope
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Sergio M Borghi
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Telma S Dos Santos
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Victor Fattori
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Stephanie Badaro-Garcia
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Doumit Camilios-Neto
- Departamento de Bioquímica e Biotecnologia, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Rubia Casagrande
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Estadual de Londrina, Londrina, Brazil
| | - Waldiceu A Verri
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil.
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Dong L, Hou X, Liu F, Tao H, Zhang Y, Zhao H, Song G. Regulation of insulin resistance by targeting the insulin-like growth factor 1 receptor with microRNA-122-5p in hepatic cells. Cell Biol Int 2019; 43:553-564. [PMID: 30958584 DOI: 10.1002/cbin.11129] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/16/2019] [Indexed: 12/15/2022]
Abstract
Insulin resistance (IR) is a common etiology of type 2 diabetes (T2D) defined by a state of decreased reactivity to insulin in multiple organs, such as the liver. This study aims to investigate how microRNA-122-5p (miR-122) regulates the hepatic IR in vitro. We first found that the miR-122 level was upregulated in the liver of rats fed with a high-fat diet and injected with streptozotocin (T2D rats), while the expression level of insulin-like growth factor 1 receptor (IGF-1R), a potential target of miR-122, was downregulated in the diabetic liver. In vitro, glucosamine-induced IR was introduced in HepG2 hepatic cells, and the levels of miR-122 and IGF-1R were further assessed. An increase of miR-122 level and a decrease of IGF-IR level were observed in IR hepatic cells, which was the same as that in the diabetic liver. Results of the luciferase reporter assay validated IGF-1R as a direct target of miR-122. Moreover, in IR HepG2 cells, antagonizing miR-122 with its specific inhibitor enhanced glucose uptake and suppressed the expression of glucose 6-phosphatase and phosphoenolpyruvate carboxykinase, two key enzymes in regulating gluconeogenesis. Such alterations induced by the miR-122 inhibitor in IR hepatic cells were impaired when IGF-1R was simultaneously knocked down. In addition, the PI3K/Akt pathway was deactivated in IR cells, and then reactivated with miR-122 inhibitor transfection. In conclusion, our study demonstrates that miR-122 is able to regulate IR in hepatic cells by targeting IGF-1R.
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Affiliation(s)
- Li Dong
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Key Laboratory of Metabolic Diseases of Hebei Province, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Department of Critical Care Medicine, First Hospital of Qinhuangdao, Qinhuangdao, 066001, Hebei, People's Republic of China
| | - Xiaoyu Hou
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Key Laboratory of Metabolic Diseases of Hebei Province, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China
| | - Fengsui Liu
- Department of Critical Care Medicine, First Hospital of Qinhuangdao, Qinhuangdao, 066001, Hebei, People's Republic of China
| | - Hong Tao
- Department of Critical Care Medicine, Qinhuangdao Hospital of Traditional Chinese Medicine, Qinhuangdao, 066006, Hebei, People's Republic of China
| | - Yunjia Zhang
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Key Laboratory of Metabolic Diseases of Hebei Province, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China
| | - Hang Zhao
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Key Laboratory of Metabolic Diseases of Hebei Province, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China
| | - Guangyao Song
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, 050017, Hebei, People's Republic of China.,Department of Endocrinology, Hebei General Hospital, Shijiazhuang, 050051, Hebei, People's Republic of China
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Probucol attenuates lipopolysaccharide-induced leukocyte recruitment and inflammatory hyperalgesia: effect on NF-кB activation and cytokine production. Eur J Pharmacol 2017; 809:52-63. [DOI: 10.1016/j.ejphar.2017.05.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 05/03/2017] [Accepted: 05/09/2017] [Indexed: 02/06/2023]
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Probucol attenuates overt pain-like behavior and carrageenan-induced inflammatory hyperalgesia and leukocyte recruitment by inhibiting NF-кB activation and cytokine production without antioxidant effects. Inflamm Res 2017; 66:591-602. [DOI: 10.1007/s00011-017-1040-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 03/08/2017] [Accepted: 03/28/2017] [Indexed: 01/18/2023] Open
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Dey A, Lakshmanan J. The role of antioxidants and other agents in alleviating hyperglycemia mediated oxidative stress and injury in liver. Food Funct 2014; 4:1148-84. [PMID: 23760593 DOI: 10.1039/c3fo30317a] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Several antioxidants and agents having similar antioxidant effects are known to exert beneficial effects in ameliorating the injurious effects of hyperglycemia on liver in different diabetic in vitro and in vivo models. The review deals with some of the agents which have been shown to exert protective effects on liver against hyperglycemic insult and the various mechanisms involved. The different classes of agents which protect the diabetic liver or decrease the severity of hyperglycemia mediated injury include flavonoids, catechins, and other polyphenolic compounds, curcumin and its derivatives, certain vitamins, hormones and drugs, trace elements, prototypical antioxidants and amino acids. Some of the pronounced changes mediated by the antioxidants in liver exposed to hyperglycemia include decreased oxidative stress, and alterations in carbohydrate and lipid metabolism. Other mechanisms through which the agents ameliorate hyperglycemia mediated liver injury include decrease in oxidative DNA and protein damage, restoration of mitochondrial structural and functional integrity, decrease in inflammation and improved insulin signaling. Thus, antioxidants may prove to be an important mode of defense in maintaining normal hepatic functions in diabetes.
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Affiliation(s)
- Aparajita Dey
- Life Science Division, AU-KBC Research Centre, MIT Campus of Anna University, Chromepet, Chennai 600044, India.
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Bhattacharya S, Gachhui R, Sil PC. The prophylactic role of D-saccharic acid-1,4-lactone against hyperglycemia-induced hepatic apoptosis via inhibition of both extrinsic and intrinsic pathways in diabetic rats. Food Funct 2013; 4:283-296. [PMID: 23138840 DOI: 10.1039/c2fo30145h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Sustained hyperglycemia and increased oxidative stress play major roles in the development of secondary complications in diabetes including liver injury. Dietary supplement of antioxidants is effective in preventing oxidative stress mediated tissue damage in diabetic pathophysiology. D-Saccharic acid 1,4-lactone (DSL), a derivative of D-glucaric acid, is present in many dietary plants and is known for its detoxifying and antioxidant properties. Our early investigation showed that DSL can ameliorate alloxan (ALX) induced diabetes mellitus and oxidative stress in rats by inhibiting pancreatic β-cell apoptosis. In the present study we investigated the protective role of DSL against hepatic dysfunction in ALX induced diabetic rats. ALX exposure elevated the blood glucose, serum ALP and ALT levels, the production of reactive oxygen species (ROS), and disturbed the intra-cellular antioxidant machineries. Oral administration of DSL restored all these alterations close to normal. By investigating the mechanism of its protective activity, we observed that DSL prevented hyperglycemia induced hepatic apoptosis by inhibiting both extrinsic and intrinsic pathways. Results showed that in the liver tissue, diabetes promoted a significant increase of TNF-α/TNF-R1 and led to the activation of caspase-8 and t-Bid. In addition, ALX exposure reciprocally regulated Bcl-2 family protein expression, disturbed mitochondrial membrane potential, and subsequently released cytochrome c from mitochondria to cytosol. As a consequence, a significant increase in caspase-3 expression was observed in the liver of diabetic animals. However, treatment of diabetic rats with DSL counteracted these changes, making it a promising approach in lessening diabetes mediated tissue damage.
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Wu R, Zhang W, Liu B, Gao J, Xiao XQ, Zhang F, Zhou HM, Wu XL, Zhang X. Probucol ameliorates the development of nonalcoholic steatohepatitis in rats fed high-fat diets. Dig Dis Sci 2013; 58:163-71. [PMID: 22878918 DOI: 10.1007/s10620-012-2335-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Accepted: 07/19/2012] [Indexed: 12/17/2022]
Abstract
AIMS We sought to evaluate the effects of probucol on steatohepatitis and associated molecular mechanisms in a rat model of nonalcoholic steatohepatitis (NASH) induced by high-fat diet (HFD). METHODS Forty male rats weighing 100-120 g were randomly assigned to the following treatments (n = 10 for each treatment): standard diet + normal saline (NC group), standard diet + 500 mg/kg/day probucol (NP group), HFD + normal saline (HD group), and HFD + 500 mg/kg/day probucol (HP group). All animals received the above treatments for 15 weeks. Lipid metabolism and steatohepatitis were assessed. Systemic insulin resistance, oxidative stress status, serum tumor necrosis factor-alpha (TNF-α) and adiponectin levels, and gene expression were examined. RESULTS High-fat feeding resulted in macrovesicular steatosis, lobular inflammation, and hepatocellular ballooning degeneration in the liver, coupled with increased concentrations of serum aspartate aminotransferase and alanine aminotransferase. Probucol exposure attenuated the biochemical and histological changes comparable with NASH. Moreover, probucol treatment significantly prevented the elevations of serum total cholesterol, low-density lipoprotein, and high-density lipoprotein and the increase in the expression of numerous lipid metabolism-related genes in HFD-fed rats. There were increased insulin sensitivity and serum adiponectin levels and enhanced hepatic AMP-activated protein kinase phosphorylation in the HP group. Probucol lessened the HFD-induced elevation of serum TNF-α and hepatic malondialdehyde and reduced antioxidant enzymatic activities. CONCLUSIONS Probucol shows beneficial effects on HFD-induced steatohepatitis by improving insulin resistance and attenuating oxidative stress and systemic inflammation.
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Affiliation(s)
- Rong Wu
- Department of Gastroenterology and Hepatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Awad AB, Alappat L, Valerio M. Vitamin D and Metabolic Syndrome Risk Factors: Evidence and Mechanisms. Crit Rev Food Sci Nutr 2012; 52:103-12. [DOI: 10.1080/10408391003785458] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Liu JH, Liu DF, Wang NN, Lin HL, Mei X. Possible role for the thioredoxin system in the protective effects of probucol in the pancreatic islets of diabetic rats. Clin Exp Pharmacol Physiol 2011; 38:528-33. [DOI: 10.1111/j.1440-1681.2011.05545.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kim JH, Park SH, Bae SS, Hong KW, Kim YD, Park KP, Choi BT, Shin HK. Combinatorial effect of probucol and cilostazol in focal ischemic mice with hypercholesterolemia. J Pharmacol Exp Ther 2011; 338:451-7. [PMID: 21546537 DOI: 10.1124/jpet.111.181180] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Hypercholesterolemia may increase stroke risk by accelerating atherosclerosis, narrowing the luminal diameter in cerebral vessels, and disrupting both vascular endothelial and smooth muscle function. In the present study, we investigated the beneficial effects of combinatorial therapy with probucol and cilostazol on focal cerebral ischemia with hypercholesterolemia. Apolipoprotein E (ApoE) knockout (KO) mice were fed a high-fat diet with or without 0.5% probucol and/or 0.2% cilostazol for 10 weeks. Probucol alone and probucol and cilostazol significantly decreased total, low-density lipoprotein, and high-density lipoprotein cholesterol, whereas cilostazol did not affect the plasma cholesterol levels in ApoE KO mice. Administration of probucol alone and cilostazol alone significantly decreased atherosclerotic lesion area in the aorta, with a significant decrease evident using combinatorial administration. Middle cerebral artery occlusion resulted in significantly larger infarct volumes in ApoE KO mice fed 10 weeks of high-fat diet compared with those in ApoE KO mice fed a regular diet. The infarct volume was reduced significantly using probucol alone or cilostazol alone and even was reduced significantly by their combinatorial administration. Consistent with a larger infarct size, the combinatorial therapy prominently improved neurological function. The combinatorial administration increased cerebral blood flow during ischemia. Expression of endothelial nitric oxide synthase and adiponectin in the cortex were decreased by high-fat diet but were elevated by combinatorial treatment. Adiponectin expression colocalized within the cerebral vascular endothelium. The data suggest that the combination of probucol and cilostazol prevents cerebrovascular damage in focal cerebral ischemic mice with hypercholesterolemia by up-regulation of endothelial nitric oxide synthase and adiponectin.
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Affiliation(s)
- Ji Hyun Kim
- Division of Meridian and Structural Medicine, School of Korean Medicine, Pusan National University, Yangsan, Gyeongnam 626-870, Republic of Korea
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13
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Palsamy P, Sivakumar S, Subramanian S. Resveratrol attenuates hyperglycemia-mediated oxidative stress, proinflammatory cytokines and protects hepatocytes ultrastructure in streptozotocin-nicotinamide-induced experimental diabetic rats. Chem Biol Interact 2010; 186:200-10. [PMID: 20307516 DOI: 10.1016/j.cbi.2010.03.028] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 03/09/2010] [Accepted: 03/12/2010] [Indexed: 12/13/2022]
Abstract
The present study was hypothesized to investigate the hepatoprotective nature of resveratrol in averting hyperglycemia-mediated oxidative stress by measuring extent of oxidant stress and levels of proinflammatory cytokines and antioxidant competence in the hepatic tissues of streptozotocin-nicotinamide-induced diabetic rats. After the experimental period of 30 days, the pathophysiological markers such as serum bilirubin and hepatic aspartate transaminase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP) were studied in addition to hepatic TNF-alpha, IL-1 beta, IL-6, NF-kappaB p65 and nitric oxide (NO) levels in control and experimental groups of rats. The levels of vitamin C, vitamin E and reduced glutathione (GSH) and activities of superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx), glutathione-S-transferase (GST) and glutathione reductase (GR) were determined in the liver tissues. Extent of oxidative stress was also assessed by hepatic lipid peroxides, hydroperoxides and protein carbonyls. A portion of liver was processed for histological and ultrastructural studies. Oral administration of resveratrol (5mg/kg b.w.) to diabetic rats showed a significant decline in hepatic proinflammatory cytokines and notable attenuation in hepatic lipid peroxides, hydroperoxides and protein carbonyls. The diminished activities of hepatic enzymic antioxidants as well as the decreased levels of hepatic non-enzymic antioxidants of diabetic rats were reverted to near normalcy by resveratrol administration. Moreover, the histological and ultrastructural observations evidenced that resveratrol effectively rescues the hepatocytes from hyperglycemia-mediated oxidative damage without affecting its cellular function and structural integrity. The findings of the present investigation demonstrated the hepatocyte protective nature of resveratrol by attenuating markers of hyperglycemia-mediated oxidative stress and antioxidant competence in hepatic tissues of diabetic rats.
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Affiliation(s)
- P Palsamy
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai 600025, Tamilnadu, India.
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