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El-Mahdy AM, Alqahtani M, Almukainzi M, Alghoribi MF, Abdel-Rhman SH. Effect of Resveratrol and Curcumin on Gene Expression of Methicillin-Resistant Staphylococcus aureus (MRSA) Toxins. J Microbiol Biotechnol 2024; 34:141-148. [PMID: 37986579 PMCID: PMC10840468 DOI: 10.4014/jmb.2309.09001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/22/2023]
Abstract
Staphylococcus aureus is an opportunistic pathogen that can lead to a number of potentially terrible community- and hospital-acquired illnesses. Among the diverse set of virulence factors that S. aureus possesses, secreted toxins play a particularly preeminent role in defining its virulence. In this work, we aimed to facilitate the development of novel strategies utilizing natural compounds to lower S. aureus's toxin production and consequently enhance therapeutic approaches. Two natural polyphenols, resveratrol (RSV) and curcumin (CUR), were tested for their effect on reducing toxin gene production of MRSA isolates. Fifty clinical MRSA isolates were gathered from Riyadh and Jeddah. Molecular screening of toxin genes (sea, seb, sec, sed, seh, lukF, and lukS) harbored by MRSA was performed. Sub-inhibitory concentrations of RSV (50 μg/ml) and CUR (20 μg/ml) were determined to study their effect on the gene expression MRSA's toxin genes. Our findings revealed the presence of the tested genes in MRSA isolates, with lukF being the most prevalent gene and seh the least detected gene. We found that RSV reduced the relative expression of toxin genes, sea, seb, lukF, and lukS, respectively, while CUR decreased the relative expression of sea and seb genes in the examined isolates. Regarding lukF and lukS, CUR downregulated the expression of both genes in some isolates and upregulated the expression in other isolates. From these results, we concluded that RSV and CUR could be used as alternative therapeutic approaches to treat MRSA infections through reducing toxin production.
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Affiliation(s)
- Areej M. El-Mahdy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Maisa Alqahtani
- Biology Department, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - May Almukainzi
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Majed F. Alghoribi
- Infectious Diseases Research Department, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
- Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City (KAMC), Ministry of National Guard Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Shaymaa H Abdel-Rhman
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
- Department of Pharmaceutics and Pharmaceutical Biotechnology, Faculty of Pharmacy, Taibah University, AlMadinah Al Munawwarah, Saudi Arabia
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Chung JY, Jeong JH, Song J. Resveratrol Modulates the Gut-Brain Axis: Focus on Glucagon-Like Peptide-1, 5-HT, and Gut Microbiota. Front Aging Neurosci 2020; 12:588044. [PMID: 33328965 PMCID: PMC7732484 DOI: 10.3389/fnagi.2020.588044] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/23/2020] [Indexed: 12/12/2022] Open
Abstract
Resveratrol is a natural polyphenol that has anti-aging and anti-inflammatory properties against stress condition. It is reported that resveratrol has beneficial functions in various metabolic and central nervous system (CNS) diseases, such as obesity, diabetes, depression, and dementia. Recently, many researchers have emphasized the connection between the brain and gut, called the gut-brain axis, for treating both CNS neuropathologies and gastrointestinal diseases. Based on previous findings, resveratrol is involved in glucagon-like peptide 1 (GLP-1) secreted by intestine L cells, the patterns of microbiome in the intestine, the 5-hydroxytryptamine (5-HT) level, and CNS inflammation. Here, we review recent evidences concerning the relevance and regulatory function of resveratrol in the gut-brain axis from various perspectives. Here, we highlight the necessity for further study on resveratrol's specific mechanism in the gut-brain axis. We present the potential of resveratrol as a natural therapeutic substance for treating both neuropathology and gastrointestinal dysfunction.
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Affiliation(s)
- Ji Yeon Chung
- Department of Neurology, Chosun University Medical School, Gwangju, South Korea
| | - Jae-Ho Jeong
- Department of Microbiology, Chonnam National University Medical School, Gwangju, South Korea
| | - Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Gwangju, South Korea
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Shi W, Zhai C, Feng W, Wang J, Zhu Y, Li S, Wang Q, Zhang Q, Yan X, Chai L, Liu P, Chen Y, Li M. Resveratrol inhibits monocrotaline-induced pulmonary arterial remodeling by suppression of SphK1-mediated NF-κB activation. Life Sci 2018; 210:140-149. [PMID: 30179628 DOI: 10.1016/j.lfs.2018.08.071] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 08/23/2018] [Accepted: 08/31/2018] [Indexed: 12/21/2022]
Abstract
AIMS This study aims to explore the molecular mechanisms underlying sphingosine kinase 1 (SphK1) inducing pulmonary vascular remodeling and resveratrol suppressing pulmonary arterial hypertension (PAH). MATERIAL AND METHODS monocrotaline (MCT) was used to induce PAH in rats. The right ventricular systolic pressure (RVSP), right ventricle hypertrophy index (RVHI) and histological analyses including hematoxylin and eosin staining, the percentage of medial wall thickness (%MT), α-SMA staining and Ki67 staining were performed to evaluate the development of PAH. Protein levels of SphK1, nuclear factor-kappaB (NF-κB)-p65 and cyclin D1 were determined using immunoblotting. Sphingosine-1-phosphate (S1P) concentration was measured using enzyme-linked immunosorbent assay. KEY FINDINGS SphK1 protein level, S1P production, NF-κB activation and cyclin D1 expression were significantly increased in MCT-induced PAH rats. Inhibition of SphK1 by PF543 suppressed S1P synthesis and NF-κB activation and down-regulated cyclin D1 expression in PAH rats. Suppression of NF-κB by pyrrolidine dithiocarbamate (PDTC) also reduced cyclin D1 expression in PAH model. Treatment of PAH rats with either PF543 or PDTC dramatically decreased RVSP, RVHI and %MT and reduced pulmonary arterial smooth muscle cells proliferation and pulmonary vessel muscularization. In addition, resveratrol effectively inhibited the development of PAH by suppression of SphK1/S1P-mediated NF-κB activation and subsequent cyclin D1 expression. SIGNIFICANCE SphK1/S1P signaling induces the development of PAH by activation of NF-κB and subsequent up-regulation of cyclin D1 expression. Resveratrol inhibits the MCT-induced PAH by targeting on SphK1 and reverses the downstream changes of SphK1, indicating that resveratrol might be a therapeutic agent for the prevention of PAH.
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Affiliation(s)
- Wenhua Shi
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, Shaanxi 710061, China; Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, Shaanxi 710061, China
| | - Cui Zhai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Wei Feng
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, Shaanxi 710061, China; Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, Shaanxi 710061, China
| | - Jian Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, Shaanxi 710061, China; Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, Shaanxi 710061, China
| | - Yanting Zhu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Shaojun Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Qingting Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Qianqian Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Xin Yan
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Limin Chai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Pengtao Liu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yuqian Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Manxiang Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
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Jimoh A, Tanko Y, Ayo JO, Ahmed A, Mohammed A. Resveratrol increases serum adiponectin level and decreases leptin and insulin level in an experimental model of hypercholesterolemia. ACTA ACUST UNITED AC 2018; 25:411-417. [PMID: 30190096 DOI: 10.1016/j.pathophys.2018.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 08/19/2018] [Accepted: 08/22/2018] [Indexed: 02/02/2023]
Abstract
Serum adiponectin concentration is inversely associated with leptin and insulin concentration. There is little paucity of information in the literature on the adipokine levels and regulation by resveratrol in cholesterol diet-fed animals. Thirty rabbits were randomly divided into six groups, each of five animals: Group 1 = control (C), Group 2 = cholesterol diet (CD) only, Group 3 = resveratrol 200 mg/kg (R200), Group 4 = resveratrol 400 mg/kg (R400), Group 5 = CD + R200, Group 6 = CD + R400. The preparations were administered for 8th weeks of the treatment protocol. weight and blood glucose level were measured on week zero and the 8th week of the treatment. At the end of the study period, the rabbits were placed under light anaesthesia. Blood samples were evaluated for serum concentrations of metabolites assays (adiponectin, leptin and insulin). Serum adiponectin significantly (P < 0.05) increased in resveratrol + CD groups, compared to CD group only. Leptin and insulin significantly (P <0.05) decreased in CD groups co-administered with resveratrol, compared with CD group only. In conclusion, the increase in adiponectin level and decrease in leptin and insulin level following resveratrol administration elucidated the therapeutic potential of resveratrol, despite cholesterol diet consumption.
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Affiliation(s)
- A Jimoh
- College of Health Sciences, Faculty of Basic Medical Science, Department of Human Physiology, Ahmadu Bello University, Zaria, Nigeria.
| | - Y Tanko
- College of Health Sciences, Faculty of Basic Medical Science, Department of Human Physiology, Ahmadu Bello University, Zaria, Nigeria
| | - J O Ayo
- Department of Veterinary Physiology, Ahmadu Bello University, Zaria, Nigeria
| | - A Ahmed
- Department of Pharmocgnosy and Drug Development, Ahmadu Bello University, Zaria, Nigeria
| | - A Mohammed
- College of Health Sciences, Faculty of Basic Medical Science, Department of Human Physiology, Ahmadu Bello University, Zaria, Nigeria
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Aydin M, Gungor B, Akdur AS, Aksulu HE, Silan C, Susam I, Cabuk AK, Cabuk G. Resveratrol did not alter blood pressure in rats with nitric oxide synthase-inhibited hypertension. Cardiovasc J Afr 2017; 28:141-146. [PMID: 28759085 PMCID: PMC5602129 DOI: 10.5830/cvja-2016-069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 07/10/2016] [Indexed: 01/10/2023] Open
Abstract
Background: Inhibition of nitric oxide synthase (NOS) is a well-known experimental model of hypertension (HT). It was shown that oxidative stress contributes to the pathogenesis of HT. Resveratrol is a potent anti-oxidant that is found in red grapes, peanuts and red wine. It improves the NO response and increases endothelial NOS expression, which causes endothelium-dependent vasorelaxation as well as renal vasodilation. We aimed to explore the effects of resveratrol on blood pressure, the water–salt balance and sodium excretion as a reflection of renal function in NOS-inhibited rat models. Methods: Thirty-five male Sprague-Dawley rats (200–250g) were used in this study. In order to obtain hypertension models, an NOS inhibitor, N-nitro-L-arginin (L-NNA) was used. The rats were randomly divided into five groups: controls (given water and 0.8% salty diet) and four groups [given L-NNA, resveratrol (RSV) eluent, RSV, and L-NNA + RSV]. Blood pressures were measured indirectly by the tailcuff method on the first, seventh and 10th days. At the end of the study protocol (10th day), fluid balance, glomerular filtration rate, fractional sodium excretion, and blood and urinesodium and creatinine levels were measured. Results: At the end of the study protocol, blood pressures were higher in only the L-NNA group (117.8 ± 3.5 vs 149.5 ± 2.1 mmHg; p < 0.05), as expected. Additional applications of RSV with L-NNA could not prevent the increase in blood pressure (122.8 ± 7.3 vs 155.4 ± 4.4 mmHg; p < 0.05). There were no remarkable changes in water–salt balance and renal function with the application of resveratrol. Conclusion: Resveratrol was unable to prevent or reverse blood pressure increase in NOS-inhibited rats.
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Affiliation(s)
- Mehmet Aydin
- Department of Cardiology, Tepecik Training and Research Hospital, Izmir, Turkey
| | - Buket Gungor
- Department of Clinical Trials, Turkish Medicines and Medical Devices Agency, Turkish Ministry of Health, Ankara, Turkey
| | - A Secil Akdur
- Department of Clinical Pharmacology, Canakkale State Hospital, Turkish Ministry of Health, Canakkale, Turkey
| | - Hakki Engin Aksulu
- Department of Pharmacology, School of Medicine, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale, Turkey
| | - Coskun Silan
- Department of Pharmacology, School of Medicine, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale, Turkey; Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale, Turkey
| | - Ibrahim Susam
- Department of Cardiology, Tepecik Training and Research Hospital, Izmir, Turkey
| | - Ali Kemal Cabuk
- Department of Cardiology, Tepecik Training and Research Hospital, Izmir, Turkey.
| | - Gizem Cabuk
- Department of Cardiology, Buca Seyfi Demirsoy State Hospital, Izmir, Turkey
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Ginés C, Cuesta S, Kireev R, García C, Rancan L, Paredes SD, Vara E, Tresguerres JAF. Protective effect of resveratrol against inflammation, oxidative stress and apoptosis in pancreas of aged SAMP8 mice. Exp Gerontol 2017; 90:61-70. [PMID: 28130161 DOI: 10.1016/j.exger.2017.01.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/30/2016] [Accepted: 01/22/2017] [Indexed: 11/15/2022]
Abstract
Aging is a physiological state in which a progressive decline in organ functions is accompanied by the development of age-related diseases. Resveratrol supplementation has been shown to exert anti-inflammatory and antioxidant effects in various mammalian models of aging. Senescence-accelerated mice (SAM) are commonly used as animal models to investigate the aging process. In the present study, the effects of inflammation, oxidative stress and apoptosis in pancreas of two different types of SAM (SAMR1 or resistant to aging, and SAMP8 or prone to aging) have been analysed, as well as the effect of resveratrol administration (5mg/kg/day) on these parameters in the SAMP8 strain. mRNA expressions of sirtuin 1 and FoxO factors were found to be decreased with aging in SAMP8 mice. An increase in inflammatory status and nuclear-factor kappa B (NFκB) protein expression was also observed in old mice, together with a decrease of anti-apoptotic markers and antioxidant-enzyme activity. Resveratrol administration was able to increase sirtuin 1 mRNA expression, as well as decreasing NFκB expression and reducing the proinflammatory and prooxidant status associated with age. In conclusion, resveratrol was able to modulate the inflammatory, oxidative and apoptotic status related to aging, thereby exerting a protective effect on pancreas age-induced damage.
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Affiliation(s)
- Cristina Ginés
- Department of Biochemistry and Molecular Biology III, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Sara Cuesta
- Department of Physiology, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Roman Kireev
- Instituto de Investigación Biomédica de Vigo (IBIV), Xerencia de Xestión Integrada de Vigo, SERGAS, Biomedical Research Unit, Hospital Rebullón (CHUVI), Vigo, Spain.
| | - Cruz García
- Department of Biochemistry and Molecular Biology III, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Lisa Rancan
- Department of Biochemistry and Molecular Biology III, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Sergio D Paredes
- Department of Physiology, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Elena Vara
- Department of Biochemistry and Molecular Biology III, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
| | - Jesús A F Tresguerres
- Department of Physiology, School of Medicine, Complutense University of Madrid, Avda. Complutense s/n. 28040 Madrid, Spain.
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Yang WM, Min KH, Lee W. MiR-1271 upregulated by saturated fatty acid palmitate provokes impaired insulin signaling by repressing INSR and IRS-1 expression in HepG2 cells. Biochem Biophys Res Commun 2016; 478:1786-91. [DOI: 10.1016/j.bbrc.2016.09.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 09/06/2016] [Indexed: 11/24/2022]
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Bhullar KS, Udenigwe CC. Clinical evidence of resveratrol bioactivity in cardiovascular disease. Curr Opin Food Sci 2016. [DOI: 10.1016/j.cofs.2016.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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del Valle P, García-Armesto MR, de Arriaga D, González-Donquiles C, Rodríguez-Fernández P, Rúa J. Antimicrobial activity of kaempferol and resveratrol in binary combinations with parabens or propyl gallate against Enterococcus faecalis. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.10.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Chen WM, Shaw LH, Chang PJ, Tung SY, Chang TS, Shen CH, Hsieh YY, Wei KL. Hepatoprotective effect of resveratrol against ethanol-induced oxidative stress through induction of superoxide dismutase in vivo and in vitro. Exp Ther Med 2016; 11:1231-1238. [PMID: 27073428 PMCID: PMC4812565 DOI: 10.3892/etm.2016.3077] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 12/01/2015] [Indexed: 12/14/2022] Open
Abstract
The present study aimed to investigate the hepatoprotective effect of resveratrol (RSV) against ethanol-induced oxidative stress in vivo, and investigate the underlying mechanisms by which RSV exerts its anti-oxidative effects on hepatic cells. C57BL/6J mice were divided into four groups: Untreated control, ethanol-treated, RSV-treated, and ethanol + RSV-treated. The plasma lipid profile, hepatic lipid accumulation and antioxidative enzyme activities were analyzed. HepG2 cells were used as a cellular model to analyze the effects of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and peroxisome proliferator-activated receptors (PPARs) in the RSV-mediated protection of ethanol-induced oxidative stress. In C57BL/6J mice, ethanol caused a significant increase in plasma triglyceride levels and hepatic lipid accumulation (P<0.05), whereas RSV notably increased SOD activity. In HepG2 cells, SOD activity was enhanced in the RSV-treated HepG2 cells, whereas the activity of CAT and GPx was not affected. Western blot and quantitative polymerase chain reaction analyses demonstrated that RSV significantly increased SOD protein and mRNA expression levels (P<0.05). Using a transient transfection assay, PPARγ was observed to participate in the regulation of SOD gene expression in RSV-administered HepG2 cells. To conclude, the results from the present study suggest that RSV may contribute towards the protection of hepatic cells from ethanol-induced oxidative stress via the induction of SOD activity and gene expression.
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Affiliation(s)
- Wei-Ming Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C.; College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Lee-Hsin Shaw
- Institute of Traditional Medicine, National Yang-Ming University, Taipei 11221, Taiwan, R.O.C
| | - Pey-Jium Chang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Shui-Yi Tung
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Te-Sheng Chang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Chein-Heng Shen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Yung-Yu Hsieh
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
| | - Kuo-Liang Wei
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Puzi, Chiayi 61363, Taiwan, R.O.C.; College of Medicine, Chang Gung University, Taoyuan 333, Taiwan, R.O.C
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Arya SS, Salve AR, Chauhan S. Peanuts as functional food: a review. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2016; 53:31-41. [PMID: 26787930 PMCID: PMC4711439 DOI: 10.1007/s13197-015-2007-9] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 08/07/2015] [Accepted: 08/24/2015] [Indexed: 10/23/2022]
Abstract
Peanut is an important crop grown worldwide. Commercially it is used mainly for oil production but apart from oil, the by-products of peanut contains many other functional compounds like proteins, fibers, polyphenols, antioxidants, vitamins and minerals which can be added as a functional ingredient into many processed foods. Recently it has also revealed that peanuts are excellent source of compounds like resveratrol, phenolic acids, flavonoids and phytosterols that block the absorption of cholesterol from diet. It is also a good source of Co-enzyme Q10 and contains all the 20 amino acids with highest amount of arginine. These bioactive compounds have been recognized for having disease preventive properties and are thought to promote longevity. The processing methods like roasting and boiling have shown increase in the concentration of these bioactive compounds. In the present paper an overview on peanut bioactive constituents and their health benefits are presented.
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Affiliation(s)
- Shalini S. Arya
- Food Engineering and Technology Department, Institute of Chemical Technology, NM Parikh Marg Matunga, Mumbai, 400 019 India
| | - Akshata R. Salve
- Food Engineering and Technology Department, Institute of Chemical Technology, NM Parikh Marg Matunga, Mumbai, 400 019 India
| | - S. Chauhan
- Food Engineering and Technology Department, Institute of Chemical Technology, NM Parikh Marg Matunga, Mumbai, 400 019 India
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12
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Yang WM, Jeong HJ, Park SW, Lee W. Obesity-induced miR-15b is linked causally to the development of insulin resistance through the repression of the insulin receptor in hepatocytes. Mol Nutr Food Res 2015; 59:2303-14. [PMID: 26179126 DOI: 10.1002/mnfr.201500107] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 06/26/2015] [Accepted: 07/10/2015] [Indexed: 01/07/2023]
Abstract
SCOPE Obesity increases intracellular lipid accumulation in key tissues or organs, which often leads to metabolic dysfunction and insulin resistance. Diets rich in saturated fatty acid (SFA) exacerbate obesity and hepatic steatosis, which accentuate the risk of insulin resistance and type 2 diabetes (T2DM). Although microRNAs (miRNAs) play a critical role in the regulation of gene expression, the implication of obesity-induced miRNAs in metabolic disorders particularly in the development of insulin resistance is largely unknown. Here, we investigated the implication of miR-15b, which is induced by SFA palmitate or obesity, in hepatic insulin resistance. METHODS AND RESULTS Diet-induced obesity (DIO) in mice developed hyperglycemia and insulin resistance, accompanying with a reduction of insulin receptor (INSR) expression. Palmitate impaired insulin signaling as well as a decrease of INSR in hepatocytes. The expression of miR-15b was upregulated by DIO or palmitate in hepatocytes. Furthermore, the overexpression of miR-15b suppressed the protein expression of INSR through targeting INSR 3' untranslated region directly, resulting in an impairment of the insulin signaling and glycogen synthesis in hepatocytes. CONCLUSION These results unveil a novel mechanism whereby miR-15b is linked causally to the pathogenesis of hepatic insulin resistance in SFA-induced obesity.
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Affiliation(s)
- Won-Mo Yang
- Department of Biochemistry, Dongguk University College of Medicine, Gyeongju, Korea
| | - Hyo-Jin Jeong
- Department of Biochemistry, Dongguk University College of Medicine, Gyeongju, Korea
| | - Se-Whan Park
- Department of Biochemistry, Dongguk University College of Medicine, Gyeongju, Korea
| | - Wan Lee
- Department of Biochemistry, Dongguk University College of Medicine, Gyeongju, Korea.,Endocrine Channelopathy, Channelopathy Research Center, Dongguk University College of Medicine, Goyang, Korea
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Tresguerres IF, Tamimi F, Eimar H, Barralet J, Torres J, Blanco L, Tresguerres JAF. Resveratrol as anti-aging therapy for age-related bone loss. Rejuvenation Res 2015; 17:439-45. [PMID: 24956408 DOI: 10.1089/rej.2014.1551] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
INTRODUCTION Previous studies have indicated that resveratrol, a natural phytoestrogen, can act as an anti-aging therapy to resist age-related changes of several body tissues. However, the anti-aging effects of resveratrol on bone have been poorly investigated in this natural aging population. Accordingly, this study was design to evaluate the effects of resveratrol on bone mass and biomechanical properties in old rat femora. METHODS Twenty 22-month-old male Wistar rats were divided into two randomly assigned groups (n=10). The first group was treated for 10 weeks with resveratrol (10 mg/kg per day) and the second group was left untreated (control). Rat femora were collected. Bone mass and bone microestructure were investigated by microcomputed tomography and histomorphometry. Biomechanical properties were determined by a three-point bending test. Plasma levels of CTX (carboxy-terminal telopeptide of type I collagen) and osteocalcin were also determined. Statistical analyses were performed by a Student two-tailed unpaired t-test. In all experiments, a value of p<0.05 was considered significant. RESULTS Microcomputed tomography analyses demonstrated that resveratrol-treated rats had significant higher bone volume, bone trabecular number, and cortical thickness and lower spacing between trabeculae in comparison to the control group. Histomorphometric analyses confirmed the increase of bone volume in resveratrol-treated rats compared to controls. Resveratrol-treated rats had significant higher bone flexural modulus, stiffness, and ultimate load compared to control group. Treatment was not associated with changes in plasma CTX or osteocalcin. CONCLUSION These findings demonstrate that resveratrol increases bone microstructure and bone mechanical properties in old male rats, suggesting that resveratrol might be used as anti-aging therapy to resist age-induced bone loss.
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Affiliation(s)
- Isabel F Tresguerres
- 1 Department of Medicine and Oral Surgery. School of Dentistry. Complutense University , Madrid, Spain
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Ferreira S, Queiroz JA, Oleastro M, Domingues FC. Insights in the pathogenesis and resistance of Arcobacter: A review. Crit Rev Microbiol 2015; 42:364-83. [PMID: 25806423 DOI: 10.3109/1040841x.2014.954523] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Arcobacter genus currently comprises 18 recognized species, among which Arcobacter butzleri, Arcobacter cryaerophilus and Arcobacter skirrowii have been associated with human and animal disease. Although these organisms, with special emphasis A. butzleri, are emerging as clinical pathogens, several aspects of their epidemiology and virulence are only starting to be clarified. In vitro human and animal cell culture assays have been used to show that several Arcobacter species can adhere to and invade eukaryotic cells, induce an immune response and produce toxins that damage host cells. In addition, data from genome sequencing highlighted several potential markers that may be helpful candidates for the study and understanding of these mechanisms; however, more work is necessary to clarify the molecular mechanisms involved in Arcobacter virulence. Arcobacter can be considered a relatively robust organism showing to be able to survive in adverse conditions, as the ones imposed by food processing and storage. Moreover, these bacteria have shown increased antibiotic resistance, along with high multidrug resistance. In this review, we seek to update the state-of-the-art concerning Arcobacter distribution, its interaction with the host, the trends of antibiotic resistance, its ability to survive, and finally the use of natural antimicrobials for control of Arcobacter.
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Affiliation(s)
- Susana Ferreira
- a CICS-UBI-Health Sciences Research Centre, University of Beira Interior , Covilhã , Portugal and
| | - João A Queiroz
- a CICS-UBI-Health Sciences Research Centre, University of Beira Interior , Covilhã , Portugal and
| | - Mónica Oleastro
- b Department of Infectious Diseases , National Reference Laboratory for Gastrointestinal Infections, National Institute of Health Dr. Ricardo Jorge , Lisbon , Portugal
| | - Fernanda C Domingues
- a CICS-UBI-Health Sciences Research Centre, University of Beira Interior , Covilhã , Portugal and
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Alagawany MM, Farag MR, Dhama K, El-Hack MEA, Tiwari R, Alam GM. Mechanisms and Beneficial Applications of Resveratrol as Feed Additive in Animal and Poultry Nutrition: A Review. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.213.221] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Li Q, Huyan T, Ye LJ, Li J, Shi JL, Huang QS. Concentration-dependent biphasic effects of resveratrol on human natural killer cells in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:10928-10935. [PMID: 25360711 DOI: 10.1021/jf502950u] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Resveratrol (RES) is a polyphenol phytoalexin from plants, which has been reported to possess a variety of biological effects. The properties of RES on human natural killer (NK) cells were assessed in this study. Results showed that RES has concentration-dependent biphasic effects on NK cells. In high concentration (50 μM), RES can inhibit viability and promoted apoptosis of NK cells and human lymphoblastoid T (Jurkat) cells, which may affect the caspase signaling pathway. The Jurkat cells were more sensitive than NK cells on the RES caused cell death. However, when the concentration range reduced from 3.13 to 1.56 μM, RES showed the positive effects on NK cells by increasing the NK cells cytotoxicity via up-regulating the expression of NKG2D and IFN-γ (in mRNA and protein levels). These results indicated that one needs to pay more attention to the dosage and biphasic effects when RES was applied as antitumor drugs or health products.
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Affiliation(s)
- Qi Li
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University , 127 YouyiXilu, Xi'an, Shaanxi 710072, People's Republic of China
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Yang WM, Jeong HJ, Park SY, Lee W. Saturated fatty acid-induced miR-195 impairs insulin signaling and glycogen metabolism in HepG2 cells. FEBS Lett 2014; 588:3939-46. [DOI: 10.1016/j.febslet.2014.09.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/14/2014] [Accepted: 09/07/2014] [Indexed: 01/23/2023]
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Resveratrol against Arcobacter butzleri and Arcobacter cryaerophilus: activity and effect on cellular functions. Int J Food Microbiol 2014; 180:62-8. [PMID: 24786554 DOI: 10.1016/j.ijfoodmicro.2014.04.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 01/24/2023]
Abstract
The frequent isolation of Arcobacter butzleri and Arcobacter cryaerophilus from food samples makes it imperative to search for potential compounds able to inhibit the development of these bacteria. Taking this into consideration, this study focuses on the antimicrobial activity of resveratrol and its mechanism of action against A. butzleri and A. cryaerophilus. The activity of resveratrol was assessed by a microdilution method and time-kill curves. Resveratrol effect on cellular functions was assessed by flow cytometry evaluating intracellular DNA content and metabolic activity. Ethidium bromide (EtBr) accumulation in the presence of resveratrol was also evaluated, as well as the susceptibility to resveratrol in the presence of phenylalanine-arginine β-naphthylamide (PAβN). Scanning electron microscopy (SEM) was used to further evaluate cell damage caused by resveratrol. Resveratrol presented MIC values of 100 and 50μg/mL to A. butzleri and A. cryaerophilus, respectively. Based on the time-kill curves, resveratrol exhibited bactericidal activity, leading to a ≥3log10CFU/mL reduction of initial inoculums, for A. butzleri exponential phase cells incubated for 6h with 1× MIC or with 2× MIC after 24h for stationary phase cells. For A. cryaerophilus cells in exponential growth phase, 99.9% killing was achieved after 24h incubation with 2× MIC, whereas, for stationary phase cells, bactericidal activity was only detected after incubation with 4× MIC. Incubation with resveratrol led to a decrease in both intracellular DNA content and metabolic activity. An increase in the accumulation of EtBr was observed in the presence of resveratrol, and the efflux pump inhibitor PAβN reduced the MIC of resveratrol. SEM analysis revealed disintegration of A. butzleri cells treated with resveratrol, whereas no morphological alteration was observed for A. cryaerophilus cells. Resveratrol has a good anti-Arcobacter activity, and the results obtained suggest that this compound could act through several different mechanisms in the inhibition of this microorganism. The results encourage the use of this compound for the development of potential strategies to control Arcobacter in food products.
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İzmirli M, Göktekin Ö, Bacaksız A, Uysal Ö, Kılıç Ü. The effect of the SIRT1 2827 A>G polymorphism, resveratrol, exercise, age and occupation in Turkish population with cardiovascular disease. Anatol J Cardiol 2014; 15:103-6. [PMID: 25252293 PMCID: PMC5336992 DOI: 10.5152/akd.2014.5214] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective: Cardiovascular disease (CVD) is the leading cause of death in Europe. One of the candidate molecule affecting epigenetic mechanisms of CVD is the SIRT1, a subclass of sirtuins, is located on the long arm of chromosome 10 (10q21.3). Particularly, the relation between 2827 A>G polymorphism of the SIRT1 positioned on exon 2, leading to conversion of histidine to arginine, and the formation of CVD is not known yet. One of the activator of SIRT1, resveratrol, is also known as a cardioprotective molecule. On the other hand, the parameters including exercise, occupation and age affect CVD. The aim of the present study was to investigate the effect of the rs144124002 (2827 A>G) single nucleotide polymorphisms (SNP) of SIRT1 and exercise-occupation-age parameters on CVD. Methods: SNP of SIRT1 were analyzed using DNA isolation, the polymerase chain reaction (PCR) and restriction fragment length polymorphism. To do so, large cohorts of CVD patients (n=293) and healthy controls (n=117) who directed Cardiology Department of Bezmialem Vakıf University, Bezmialem Vakıf University Hospital were used. Results: In this study, when we assessed CVD and control groups about 2827 A>G polymorphism, all individuals were determined as homozygous genotype. We found a positive effect between the modifications of resveratrol, exercise, age and occupation and CVD (OR=0.17; CI 95%, 0.1-0.2; p≤0.001). Conclusion: This is the first study demonstrating the correlation between the SIRT1 rs144124002 polymorphism and CVD in Turkish population.
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Affiliation(s)
- Müzeyyen İzmirli
- Department of Medical Biology, Faculty of Medicine, Bezmialem Vakıf University; İstanbul-Turkey; Department of Medical Biology, Faculty of Medicine, Mustafa Kemal University; Hatay-Turkey.
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Resveratrol inhibits phenotype modulation by platelet derived growth factor-bb in rat aortic smooth muscle cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:572430. [PMID: 24738020 PMCID: PMC3964901 DOI: 10.1155/2014/572430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 01/08/2014] [Accepted: 01/27/2014] [Indexed: 02/07/2023]
Abstract
Dedifferentiated vascular smooth muscle cells (VSMCs) are phenotypically modulated from the contractile state to the active synthetic state in the vessel wall. In this study, we investigated the effects of resveratrol on phenotype modulation by dedifferentiation and the intracellular signal transduction pathways of platelet derived growth factor-bb (PDGF-bb) in rat aortic vascular smooth muscle cells (RAOSMCs). Treatment of RAOSMCs with resveratrol showed dose-dependent inhibition of PDGF-bb-stimulated proliferation. Resveratrol treatment inhibited this phenotype change and disassembly of actin filaments and maintained the expression of contractile phenotype-related proteins such as calponin and smooth muscle actin-alpha in comparison with only PDGF-bb stimulated RAOSMC. Although PDGF stimulation elicited strong and detectable Akt and mTOR phosphorylations lasting for several hours, Akt activation was much weaker when PDGF was used with resveratrol. In contrast, resveratrol only slightly inhibited phosphorylations of 42/44 MAPK and p38 MAPK. In conclusion, RAOSMC dedifferentiation, phenotype, and proliferation rate were inhibited by resveratrol via interruption of the balance of Akt, 42/44MAPK, and p38MAPK pathway activation stimulated by PDGF-bb.
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Resveratrol stimulates sphingosine-1-phosphate signaling of cathelicidin production. J Invest Dermatol 2013; 133:1942-9. [PMID: 23856934 PMCID: PMC3753186 DOI: 10.1038/jid.2013.133] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 02/07/2013] [Accepted: 02/26/2013] [Indexed: 12/26/2022]
Abstract
We recently discovered a regulatory mechanism that stimulates production of the multifunctional antimicrobial peptide, cathelicidin antimicrobial peptide (CAMP). In response to subtoxic levels of ER stress, increased sphingosine-1-phosphate (S1P) production activates an NFκB→C/EBPα dependent pathway that enhances CAMP production in cultured human keratinocytes. Since the multifunctional stilbenoid compound, resveratrol (RESV), increases ceramide (Cer) levels, a precursor of S1P, we hypothesized and assessed whether RESV could exploit the same pathway to regulate CAMP production. Accordingly, RESV significantly increased Cer and S1P levels in cultured keratinocytes, paralleled by increased CAMP mRNA/protein expression. Furthermore, topical RESV also increased murine CAMP mRNA/protein expression in mouse skin. Conversely, blockade of Cer→sphingosine→S1P metabolic conversion, with specific inhibitors of ceramidase or sphingosine kinase, attenuated the expected RESV-mediated increase in CAMP expression. The RESV-induced increase in CAMP expression required both NF-κB and C/EBPα transactivation. Moreover, conditioned media from keratinocyte treated with RESV significantly suppressed Staphylococcus aureus growth. Finally, topical RESV, if not coapplied with a specific inhibitor of sphingosine kinase, blocked Staphylococcus aureus invasion into murine skin. These results demonstrate that the dietary stilbenoid, RESV, stimulates S1P signaling of CAMP production through an NF-κB→C/EBPα-dependent mechanism, leading to enhanced antimicrobial defense against exogenous microbial pathogens.
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Cho EJ, Shin JS, Chung KS, Lee YS, Cho YW, Baek NI, Chung HG, Lee KT. Arvelexin inhibits colonic inflammation by suppression of NF-κB activation in dextran sulfate sodium-induced mice and TNF-α-induced colonic epithelial cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7398-7407. [PMID: 22794033 DOI: 10.1021/jf3009553] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Recently, we reported the anti-inflammatory effects of arvelexin isolated from Brassica rapa in macrophages. In the present study, the effects of arvelexin were investigated in a dextran sulfate sodium (DSS)-induced colitis mouse model and in a cellular model. In the DSS-induced colitis model, arvelexin significantly reduced the severity of colitis, as assessed by disease activity, colonic damage, neutrophil infiltration, and levels of colonic iNOS. Moreover, arvelexin inhibited the expressions of IL-8, IP-10, ICAM-1, and VCAM-1 in HT-29 colonic epithelial cells. Arvelexin also inhibited the TNF-α-induced adhesion of U937 monocytic cells to HT-29 cells. Furthermore, arvelexin reduced p65 NF-κB subunit translocation to the nucleus and IκBα degradation in the colonic tissues and in TNF-α-induced HT-29 cells. These results demonstrate that the ameliorative effects of arvelexin on colonic injury are mainly related to its ability to inhibit the inflammatory responses via NF-κB inactivation, and support its possible therapeutic role in colitis.
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Affiliation(s)
- Eu-Jin Cho
- Department of Pharmaceutical Biochemistry, College of Pharmacy, and ⊥Department of Life and Nanopharmaceutical Science, College of Pharmacy, Kyung Hee University , Seoul, Korea
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Royce SG, Ververis K, Karagiannis TC. Controversies Surrounding the Potential Use of Histone Deacetylase Inhibitors for the Treatment of Asthma. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/452307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Management of asthma with long-acting β2-adrenergic receptor agonists and corticosteroids is exceptionally effective for the majority of asthma patients. However, corticosteroid insensitivity or resistance remains a significant clinical problem for a significant proportion of patients, requiring the investigation of new potential therapeutics for asthma. Histone deacetylase inhibitors represent a different class of compounds that have been evaluated for their potential antiasthmatic effects. Although accumulating evidence is indicating beneficial effects in rodent models of allergic airways disease, the potential use of histone deacetylase inhibitors in asthma remains controversial given their mechanisms of action. The aim of this paper is to provide an overview of histone deacetylases and pharmacological modifiers of these enzymes. The discussion represents a balanced account of the emerging evidence indicating the beneficial effects of histone deacetylase inhibitors in inflammatory lung diseases. The potential problems associated with the use of this class of compounds in asthma are also carefully considered.
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Affiliation(s)
- Simon G. Royce
- Allergy and Immune Disorders, Murdoch Children’s Research Institute, Parkville, VIC, Australia
- Department of Pathology, The University of Melbourne, Parkville, VIC, Australia
| | - Katherine Ververis
- Department of Pathology, The University of Melbourne, Parkville, VIC, Australia
- Epigenomic Medicine, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, Melbourne, VIC, Australia
| | - Tom C. Karagiannis
- Department of Pathology, The University of Melbourne, Parkville, VIC, Australia
- Epigenomic Medicine, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, Melbourne, VIC, Australia
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Shin JS, Noh YS, Lee YS, Cho YW, Baek NI, Choi MS, Jeong TS, Kang E, Chung HG, Lee KT. Arvelexin from Brassica rapa suppresses NF-κB-regulated pro-inflammatory gene expression by inhibiting activation of IκB kinase. Br J Pharmacol 2012; 164:145-58. [PMID: 21434881 DOI: 10.1111/j.1476-5381.2011.01351.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND AND PURPOSE Brassica rapa species constitute one of the major sources of food. In the present study, we investigated the anti-inflammatory effects and the underlying molecular mechanism of arvelexin, isolated from B. rapa, on lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages and on a model of septic shock induced by LPS. EXPERIMENTAL APPROACH The expression of Inducible nitric oxide synthase (iNOS) and COX-2, TNF-α, IL-6 and IL-1β were determined by Western blot and/or RT-PCR respectively. To elucidate the underlying mechanism(s), activation of NF-κB activation and its pathways were investigated by electrophoretic mobility shift assay, reporter gene and Western blot assays. In addition, the in vivo anti-inflammatory effects of arvelexin were evaluated in endotoxaemia induced with LPS. KEY RESULTS Promoter assays for iNOS and COX-2 revealed that arvelexin inhibited LPS-induced NO and prostaglandin E(2) production through the suppression of iNOS and COX-2 at the level of gene transcription. In addition, arvelexin inhibited NF-κB-dependent inflammatory responses by modulating a series of intracellular events of IκB kinase (IKK)-inhibitor κBα (IκBα)-NF-κB signalling. Moreover, arvelexin inhibited IKKβ-elicited NF-κB activation as well as iNOS and COX-2 expression. Serum levels of NO and inflammatory cytokines and mortality in mice challenged injected with LPS were significantly reduced by arvelexin. CONCLUSION AND IMPLICATIONS Arvelexin down-regulated inflammatory iNOS, COX-2, TNF-α, IL-6 and IL-1β gene expression in macrophages interfering with the activation of IKKβ and p38 mitogen-activated protein kinase, and thus, preventing NF-κB activation.
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Affiliation(s)
- Ji-Sun Shin
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, Seoul, Korea
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Denissova NG, Nasello CM, Yeung PL, Tischfield JA, Brenneman MA. Resveratrol protects mouse embryonic stem cells from ionizing radiation by accelerating recovery from DNA strand breakage. Carcinogenesis 2011; 33:149-55. [PMID: 22049530 DOI: 10.1093/carcin/bgr236] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Resveratrol has elicited many provocative anticancer effects in laboratory animals and cultured cells, including reduced levels of oxidative DNA damage, inhibition of tumor initiation and progression and induction of apoptosis in tumor cells. Use of resveratrol as a cancer-preventive agent in humans will require that its anticancer effects not be accompanied by damage to normal tissue stem or progenitor cells. In mouse embryonic stem cells (mESC) or early mouse embryos exposed to ethanol, resveratrol has been shown to suppress apoptosis and promote survival. However, in cells exposed to genotoxic stress, survival may come at the expense of genome stability. To learn whether resveratrol can protect stem cells from DNA damage and to study its effects on genomic integrity, we exposed mESC pretreated with resveratrol to ionizing radiation (IR). Forty-eight hours pretreatment with a comparatively low concentration of resveratrol (10 μM) improved survival of mESC >2-fold after exposure to 5 Gy of X-rays. Cells pretreated with resveratrol sustained the same levels of reactive oxygen species and DNA strand breakage after IR as mock-treated controls, but repaired DNA damage more rapidly and resumed cell division sooner. Frequencies of IR-induced mutation at a chromosomal reporter locus were not increased in cells pretreated with resveratrol as compared with controls, indicating that resveratrol can improve viability in mESC after DNA damage without compromising genomic integrity.
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Affiliation(s)
- Natalia G Denissova
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, 145 Bevier Road, Piscataway, NJ 08854, USA
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Abete I, Goyenechea E, Zulet MA, Martínez JA. Obesity and metabolic syndrome: potential benefit from specific nutritional components. Nutr Metab Cardiovasc Dis 2011; 21 Suppl 2:B1-B15. [PMID: 21764273 DOI: 10.1016/j.numecd.2011.05.001] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 05/13/2011] [Accepted: 05/19/2011] [Indexed: 11/22/2022]
Abstract
The prevalence of metabolic syndrome (MetS) manifestations is rapidly increasing worldwide, and is becoming an important health problem. Actually, MetS includes a combination of clinical complications such as obesity (central adiposity), insulin resistance, glucose intolerance, dyslipidemia, non-alcoholic fatty liver disease and hypertension. All these alterations predispose individuals to type 2 diabetes and cardiovascular disease inducing earlier mortality rates among people. In general terms, it is difficult for patients to follow a standard long-term diet/exercise regime that would improve or alleviate MetS symptoms. Thus, the investigation of food components that may deal with the MetS features is an important field for ameliorate and facilitate MetS dietary-based therapies. Currently antioxidants are of great interest due to the described association between obesity, cardiovascular alterations and oxidative stress. On the other hand, high MUFA and PUFA diets are being also considered due to their potential benefits on hypertension, insulin resistance and triglyceride levels. Mineral composition of the diet is also relevant since high potassium intake may improve hypertension and high calcium consumption may promote lipid oxidation. Thus, although nutritional supplements are at the peak of dietetic therapies, the consumption of some specific foods (legumes, fatty fish, vegetables and fruits, etc) with bioactive components within an energy-restricted diet is a promising approach to manage MetS manifestations. Therefore, the present review focuses on some of the most important food components currently investigated to improve and make easier the nutritional MetS treatment.
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Affiliation(s)
- I Abete
- Dpto. de Ciencias de Alimentación, Fisiología y Toxicología, Universidad de Navarra, Pamplona (Navarra), Spain
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Liposomal Antioxidants for Protection against Oxidant-Induced Damage. J Toxicol 2011; 2011:152474. [PMID: 21876690 PMCID: PMC3157762 DOI: 10.1155/2011/152474] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 04/13/2011] [Accepted: 05/24/2011] [Indexed: 12/26/2022] Open
Abstract
Reactive oxygen species (ROS), including superoxide anion, hydrogen peroxide, and hydroxyl radical, can be formed as normal products of aerobic metabolism and can be produced at elevated rates under pathophysiological conditions. Overproduction and/or insufficient removal of ROS result in significant damage to cell structure and functions. In vitro studies showed that antioxidants, when applied directly and at relatively high concentrations to cellular systems, are effective in conferring protection against the damaging actions of ROS, but results from animal and human studies showed that several antioxidants provide only modest benefit and even possible harm. Antioxidants have yet to be rendered into reliable and safe therapies because of their poor solubility, inability to cross membrane barriers, extensive first-pass metabolism, and rapid clearance from cells. There is considerable interest towards the development of drug-delivery systems that would result in the selective delivery of antioxidants to tissues in sufficient concentrations to ameliorate oxidant-induced tissue injuries. Liposomes are biocompatible, biodegradable, and nontoxic artificial phospholipid vesicles that offer the possibility of carrying hydrophilic, hydrophobic, and amphiphilic molecules. This paper focus on the use of liposomes for the delivery of antioxidants in the prevention or treatment of pathological conditions related to oxidative stress.
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Closer association of mitochondria with lipid droplets in hepatocytes and activation of Kupffer cells in resveratrol-treated senescence-accelerated mice. Histochem Cell Biol 2011; 136:475-89. [PMID: 21818579 DOI: 10.1007/s00418-011-0847-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2011] [Indexed: 12/13/2022]
Abstract
Resveratrol has been extensively investigated because of its beneficial effects in delaying age-related diseases, thus extending the lifespan, possibly by mimicking calorie restriction. For this study, cell biological techniques were used to examine how resveratrol influenced hepatocytes in a senescence-accelerated mouse P10 (SAMP10), treated from 35 to 55 weeks of age, with special emphasis on the relationship between mitochondria and lipid droplets. Survival ratio, body weight and food intake of SAMP10 did not differ significantly between the control and resveratrol-treated groups. Compared with the control, the treated livers were altered significantly, as follows. Lipid droplets were reduced and mitochondria were increased in number in hepatocytes. Phosphorylation of acetyl-CoA carboxylase and the expression of both the mitochondrial ATP synthase β subunit and Mn superoxide dismutase (SOD2) were increased. Mitochondria, expressing more SOD2, were more tightly associated with lipid droplets, suggesting the enhancement of lipolysis through the activation of mitochondrial functions. Cathepsin D expression was less in hepatocytes but enhanced in Kupffer cells, which were increased in number and size with more numerous lysosome-related profiles. Together, resveratrol may activate mitochondria resulting in consuming lipids, and may also activate Kupffer cells by which a beneficial milieu for hepatocytes may be created. Both might be related to improvement in the functioning of the liver, which is the organ that is central to metabolic regulation.
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Bouchecareilh M, Balch WE. Proteostasis: a new therapeutic paradigm for pulmonary disease. PROCEEDINGS OF THE AMERICAN THORACIC SOCIETY 2011; 8:189-95. [PMID: 21543800 PMCID: PMC3131838 DOI: 10.1513/pats.201008-055ms] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Accepted: 02/01/2011] [Indexed: 01/10/2023]
Abstract
Among lung pathologies, α1AT, chronic obstructive pulmonary disease (COPD), emphysema, and asthma are diseases triggered by local environmental stress in the airway that we refer to herein collectively as airway stress diseases (ASDs). A deficiency of α-1-antitrypsin (α1AT) is an inherited genetic disorder that is a consequence of the misfolding of α1AT during protein synthesis in liver hepatocytes, reducing secretion to the plasma and delivery to the lung. Deficiency of α1AT in the lung triggers a similar pathological phenotype to other ASDs. Moreover, the loss of α1AT in the lung is a well-known environmental risk factor for COPD/emphysema. To date there are no effective therapeutic approaches to address ASDs, which reflects a general lack of understanding of their cellular basis. Herein, we propose that ASDs are disorders of proteostasis. That is, they are initiated and propagated by a common theme-a challenge to protein folding capacity maintained by the proteostasis network (PN) (see Balch et al., Science 2008;319:916-919). The PN is a network of chaperones and degradative components that generates and manages protein folding pathways responsible for normal human physiology. In ASD, we suggest that the PN system fails to respond to the increased burden of unfolded proteins due to genetic and environmental stresses, thus triggering pulmonary pathophysiology. We introduce the enabling concept of proteostasis regulators (PRs), small molecules that regulate signaling pathways that control the composition and activity of PN components, as a new and general approach for therapeutic management of ASDs.
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Affiliation(s)
- Marion Bouchecareilh
- Department of Cell Biology, The Skaggs Institute for Chemical Biology, Department of Chemical Physiology and the Institute for Childhood and Neglected Diseases, The Scripps Research Institute, La Jolla, California
| | - William E. Balch
- Department of Cell Biology, The Skaggs Institute for Chemical Biology, Department of Chemical Physiology and the Institute for Childhood and Neglected Diseases, The Scripps Research Institute, La Jolla, California
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Sang Kil J, Son Y, Cheong YK, Kim NH, Jeong HJ, Don Kang S, Chung HT, Pae HO. An anticancer/cytotoxic activity of resveratrol is not hampered by its ability to induce the expression of the antioxidant/cytoprotective heme oxygenase-1 in RAW264.7 cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.bionut.2011.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Abstract
The use of novel and improved chemopreventive and chemotherapeutic agents for the prevention and treatment of cancer is on the rise. Natural products have always afforded a rich source of such agents. Epidemiological evidence suggests that a higher flavonoid intake is associated with low cancer risk. Accumulating data clearly indicate that the induction of apoptosis is an important component in the chemoprevention of cancer by naturally occurring dietary agents. Resveratrol, a naturally occurring polyphenol, demonstrates pleiotropic health benefits, including antioxidant, anti-inflammatory, antiaging, cardioprotective, and neuroprotective activities. Because of these properties and their wide distribution throughout the plant kingdom, resveratrol is envisioned as a potential chemopreventive/curative agent. Currently, a number of preclinical findings from our lab and elsewhere suggest resveratrol to be a promising natural weapon in the war against cancer. Remarkable progress in elucidating the molecular mechanisms underlying the anticancer properties of resveratrol has been achieved. Here, we focus on some of the myriad pathways that resveratrol targets to exert its chemopreventive role and advocate that resveratrol holds tremendous potential as an efficient anticancer drug of the future.
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Fabbrocini G, Kisslinger A, Iannelli P, Vitale N, Procaccini C, Sparaneo G, Chieffi P, Ayala F, Mancini FP, Tramontano D. Resveratrol regulates p66Shc activation in HaCaT cells. Exp Dermatol 2011; 19:895-903. [PMID: 20626463 DOI: 10.1111/j.1600-0625.2010.01117.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Skin is exposed to both endogenous and environmental oxidant agents, leading to the harmful generation of reactive oxygen species. Particular interest has been pointed on plant antioxidants, such as resveratrol, because of their wide-ranging biological activity and clinical potential. Resveratrol exerts antioxidant, metabolism-regulating and pro-apoptotic/anti-cancer effects on a variety of experimental models and has been suggested to protect skin from ultraviolet-induced photodamaging and photoaging. In parallel, also the biological significance of p66Shc, a member of the Src Homologue and Collagene homologue family with redox activity, is getting further attention. Because of the striking intersection among the activities of resveratrol with those of p66Shc, we investigated whether resveratrol would activate p66Shc in human immortalised keratinocytes (HaCaT cells), a well known and largely used model for skin keratinocytes. HaCaT cells were treated with resveratrol (10-150 μm) for different times. The effect of resveratrol on the proliferation of HaCaT cells and the activation of ERK1/2, AKT, and p66Shc was investigated by cell counting, fluorescence-activated cell sorting, and western blot analysis of total or immunoprecipitated cell extracts. In HaCaT cells, resveratrol induces dose- and time-dependent growth arrest, p66Shc-Ser36 phosphorylation, ERK1/2 phosphorylation and AKT dephosphorylation. Finally, we showed that resveratrol-induced p66Shc-Ser36 phosphorylation is dependent on ERK1/2 activation. Interestingly, these resveratrol-induced molecular effects were associated with reduced adhesion and reversible growth arrest rather than cell death pathways. This is the first evidence linking resveratrol with p66Shc and suggests that p66Shc may contribute to the effect of resveratrol on cell proliferation and function in the outermost layer of the skin.
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Affiliation(s)
- Gabriella Fabbrocini
- Department of Systematic Pathology, University of Naples Federico II, Naples, Italy
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Calabrese V, Cornelius C, Dinkova-Kostova AT, Calabrese EJ, Mattson MP. Cellular stress responses, the hormesis paradigm, and vitagenes: novel targets for therapeutic intervention in neurodegenerative disorders. Antioxid Redox Signal 2010; 13:1763-811. [PMID: 20446769 PMCID: PMC2966482 DOI: 10.1089/ars.2009.3074] [Citation(s) in RCA: 589] [Impact Index Per Article: 42.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 04/27/2010] [Accepted: 05/01/2010] [Indexed: 12/22/2022]
Abstract
Despite the capacity of chaperones and other homeostatic components to restore folding equilibrium, cells appear poorly adapted for chronic oxidative stress that increases in cancer and in metabolic and neurodegenerative diseases. Modulation of endogenous cellular defense mechanisms represents an innovative approach to therapeutic intervention in diseases causing chronic tissue damage, such as in neurodegeneration. This article introduces the concept of hormesis and its applications to the field of neuroprotection. It is argued that the hormetic dose response provides the central underpinning of neuroprotective responses, providing a framework for explaining the common quantitative features of their dose-response relationships, their mechanistic foundations, and their relationship to the concept of biological plasticity, as well as providing a key insight for improving the accuracy of the therapeutic dose of pharmaceutical agents within the highly heterogeneous human population. This article describes in mechanistic detail how hormetic dose responses are mediated for endogenous cellular defense pathways, including sirtuin and Nrf2 and related pathways that integrate adaptive stress responses in the prevention of neurodegenerative diseases. Particular attention is given to the emerging role of nitric oxide, carbon monoxide, and hydrogen sulfide gases in hormetic-based neuroprotection and their relationship to membrane radical dynamics and mitochondrial redox signaling.
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Li L, Seeram NP. Maple syrup phytochemicals include lignans, coumarins, a stilbene, and other previously unreported antioxidant phenolic compounds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:11673-11679. [PMID: 21033720 DOI: 10.1021/jf1033398] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Twenty-three phenolic compounds were isolated from a butanol extract of Canadian maple syrup (MS-BuOH) using chromatographic methods. The compounds were identified from their nuclear magnetic resonance and mass spectral data as 7 lignans [lyoniresinol (1), secoisolariciresinol (2), dehydroconiferyl alcohol (3), 5'-methoxy-dehydroconiferyl alcohol (4), erythro-guaiacylglycerol-β-O-4'-coniferyl alcohol (5), erythro-guaiacylglycerol-β-O-4'-dihydroconiferyl alcohol (6), and [3-[4-[(6-deoxy-α-l-mannopyranosyl)oxy]-3-methoxyphenyl]methyl]-5-(3,4-dimethoxyphenyl)dihydro-3-hydroxy-4-(hydroxymethyl)-2(3H)-furanone (7)], 2 coumarins [scopoletin (8) and fraxetin (9)], a stilbene [(E)-3,3'-dimethoxy-4,4'-dihydroxystilbene (10)], and 13 phenolic derivatives [2-hydroxy-3',4'-dihydroxyacetophenone (11), 1-(2,3,4-trihydroxy-5-methylphenyl)ethanone (12), 2,4,5-trihydroxyacetophenone (13), catechaldehyde (14), vanillin (15), syringaldehyde (16), gallic acid (17), trimethyl gallic acid methyl ester (18), syringic acid (19), syringenin (20), (E)-coniferol (21), C-veratroylglycol (22), and catechol (23)]. The antioxidant activities of MS-BuOH (IC50>1000 μg/mL), pure compounds, vitamin C (IC50=58 μM), and a synthetic commercial antioxidant, butylated hydroxytoluene (IC50=2651 μM), were evaluated in the diphenylpicrylhydrazyl (DPPH) radical scavenging assay. Among the isolates, the phenolic derivatives and coumarins showed superior antioxidant activity (IC50<100 μM) compared to the lignans and stilbene (IC50>100 μM). Also, this is the first report of 16 of these 23 phenolics, that is, compounds 1, 2, 4-14, 18, 20, and 22, in maple syrup.
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Affiliation(s)
- Liya Li
- Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
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Seo JS, Moon MH, Jeong JK, Seol JW, Lee YJ, Park BH, Park SY. SIRT1, a histone deacetylase, regulates prion protein-induced neuronal cell death. Neurobiol Aging 2010; 33:1110-20. [PMID: 21074897 DOI: 10.1016/j.neurobiolaging.2010.09.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 07/27/2010] [Accepted: 09/20/2010] [Indexed: 01/14/2023]
Abstract
Prion diseases associated with the conversion of the cellular prion protein (PrP(C)) to the misfolded isoform (PrP(Sc)), affect the central nervous system (CNS) of humans and animals. Resveratrol, an activator of class III histone deacetylase SIRT1, is important in attenuating cellular injury and oxidative stress. The present study investigated the effects of SIRT1 activation on prion protein-mediated neuronal cell death and examined its possible signals in intracellular apoptotic pathways. Resveratrol treatment significantly increased both SIRT1 protein expression and SIRT1 activity and protected neuronal cells against PrP (106-126)-induced cell death. Resveratrol-mediated SIRT1 activation decreased the acetylation of p53 and p65 induced by prion protein and SIRT1 inhibitor. SIRT1 activation also inhibited PrP (106-126)-mediated p38 mitogen-activating protein kinase (MAPK) activation and caspase-3 cleavage, and increased the expression of anti-apoptotic Bcl-xL protein. Furthermore, SIRT1 overexpression by using adenoviral vector protected neuronal cells against PrP (106-126). These results indicate that resveratrol inhibits PrP (106-126)-induced neuronal cell death by regulating SIRT1 activity and SIRT-related signaling, and suggest that prion-related disease may be attenuated by SIRT1 activation or by intake of SIRT1-activating molecules.
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Affiliation(s)
- Jae-Suk Seo
- Center for Healthcare Technology Development, Korea Zoonoses Research Institute, College of Veterinary Medicine, Chonbuk National University, Jeonju, Jeonbuk, South Korea
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Kelsey NA, Wilkins HM, Linseman DA. Nutraceutical antioxidants as novel neuroprotective agents. Molecules 2010; 15:7792-814. [PMID: 21060289 PMCID: PMC4697862 DOI: 10.3390/molecules15117792] [Citation(s) in RCA: 300] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 10/20/2010] [Indexed: 12/20/2022] Open
Abstract
A variety of antioxidant compounds derived from natural products (nutraceuticals) have demonstrated neuroprotective activity in either in vitro or in vivo models of neuronal cell death or neurodegeneration, respectively. These natural antioxidants fall into several distinct groups based on their chemical structures: (1) flavonoid polyphenols like epigallocatechin 3-gallate (EGCG) from green tea and quercetin from apples; (2) non-flavonoid polyphenols such as curcumin from tumeric and resveratrol from grapes; (3) phenolic acids or phenolic diterpenes such as rosmarinic acid or carnosic acid, respectively, both from rosemary; and (4) organosulfur compounds including the isothiocyanate, L-sulforaphane, from broccoli and the thiosulfonate allicin, from garlic. All of these compounds are generally considered to be antioxidants. They may be classified this way either because they directly scavenge free radicals or they indirectly increase endogenous cellular antioxidant defenses, for example, via activation of the nuclear factor erythroid-derived 2-related factor 2 (Nrf2) transcription factor pathway. Alternative mechanisms of action have also been suggested for the neuroprotective effects of these compounds such as modulation of signal transduction cascades or effects on gene expression. Here, we review the literature pertaining to these various classes of nutraceutical antioxidants and discuss their potential therapeutic value in neurodegenerative diseases.
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Affiliation(s)
- Natalie A. Kelsey
- Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208, USA; E-Mails: (N.A.K.); (H.M.W.)
| | - Heather M. Wilkins
- Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208, USA; E-Mails: (N.A.K.); (H.M.W.)
| | - Daniel A. Linseman
- Department of Biological Sciences and Eleanor Roosevelt Institute, University of Denver, Denver, Colorado 80208, USA; E-Mails: (N.A.K.); (H.M.W.)
- Research Service, Veterans Affairs Medical Center, Denver, Colorado 80220, USA
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1 (303) 871-5654; Fax: +1 (303) 871-5699
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Beaudeux JL, Nivet-Antoine V, Giral P. Resveratrol: a relevant pharmacological approach for the treatment of metabolic syndrome? Curr Opin Clin Nutr Metab Care 2010; 13:729-36. [PMID: 20823772 DOI: 10.1097/mco.0b013e32833ef291] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW The metabolic syndrome is associated with increased risk for development of both cardiovascular disease and type 2 diabetes in humans. Because experimental data and clinical experience have shown that metabolic syndrome and caloric restriction have, at least partly, opposite pathophysiological pathways, the activation of sirtuins may constitute a pharmacological approach to treat metabolic syndrome. Resveratrol is a polyphenol produced by plants that has multiple beneficial activities similar to those associated with caloric restriction. RECENT FINDINGS Through its regulatory action of both AMP kinase and the sirtuin sirtuin-1, resveratrol is a natural sirtuin activator that certainly will be the head of a new pharmacological family of drugs targeted on sirtuin-1 activity exacerbation in order to treat/protect from obesity and diabetes, and thus metabolic syndrome. SUMMARY This review discusses the therapeutic use of resveratrol and sirtuin activators in the context of insulin resistance and obesity, the two main features of metabolic syndrome.
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Affiliation(s)
- Jean-Louis Beaudeux
- EA 4466 Stress cellulaire: physiopathologie, stratégies nutritionnelles et innovations thérapeutiques, Faculté de Pharmacie Paris Descartes, hôpital Charles Foix, APHP, Paris, France
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Fon Tacer K, Pompon D, Rozman D. Adaptation of cholesterol synthesis to fasting and TNF-alpha: profiling cholesterol intermediates in the liver, brain, and testis. J Steroid Biochem Mol Biol 2010; 121:619-25. [PMID: 20206258 DOI: 10.1016/j.jsbmb.2010.02.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 02/16/2010] [Accepted: 02/24/2010] [Indexed: 12/18/2022]
Abstract
Key players in pathogenesis of metabolic disorders are disturbed cholesterol balance and inflammation. In addition to cholesterol also sterol intermediates are biologically active, however, surprisingly little is known about their synthesis and roles. The aim of our study was to assess the interplay between the inflammatory cytokine TNF-alpha and cholesterol synthesis by measuring cholesterol and its intermediates in the liver, brain, and testis. Liquid chromatography-mass spectrometry has been applied to profile sterols of normally fed mice, during fasting and after TNF-alpha administration. In mice on normal chow diet, sterols other than cholesterol represent 0.5% in the liver, 1% in brain and 5% in testis. In the liver only 7-dehydrocholesterol, lanosterol and desmosterol were detected. Major sterol intermediates of the brain are desmosterol, testis meiosis activating sterol (T-MAS), and 7-dehydrocholesterol while in testis T-MAS predominates (4%), followed by desmosterol, lanosterol, 7-dehydrocholesterol and others. In 20h fasting there is no significant change in cholesterol of the three tissues, and no significant change in intermediates of the liver. In the brain sterol intermediates are lowered (significant for zymosterol) while in the testis the trend is opposite. TNF-alpha provokes a significant raise of some intermediates whereas the level of cholesterol is again unchanged. The proportion of sterols in the liver rises from 0.5% in controls to 1.2% in TNF-alpha-treated mice, which is in accordance with published expression profiling data. In conclusion, our data provide novel insights into the interaction between the inflammatory cytokine TNF-alpha and the tissue-specific cholesterol biosynthesis of the liver, brain and testis.
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Affiliation(s)
- Klementina Fon Tacer
- Center for Functional Genomic and Biochips, Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Zaloska 4, SI-1000 Ljubljana, Slovenia
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Agrawal SM, Yong VW. The many faces of EMMPRIN - roles in neuroinflammation. Biochim Biophys Acta Mol Basis Dis 2010; 1812:213-9. [PMID: 20674741 DOI: 10.1016/j.bbadis.2010.07.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 07/07/2010] [Accepted: 07/26/2010] [Indexed: 11/28/2022]
Abstract
The central nervous system (CNS) is a relatively immune-privileged organ, wherein a well-instated barrier system (the blood-brain barrier) prevents the entry of blood cells into the brain with the exception of regular immune surveillance cells. Despite this tight security immune cells are successful in entering the CNS tissue where they result in states of neuroinflammation, tissue damage and cell death. Various components of the blood-brain barrier and infiltrating cells have been examined to better understand how blood cells are able to breach this secure barrier. Proteases, specifically matrix metalloproteinases (MMP), have been found to be the common culprits in most diseases involving neuroinflammation. MMPs secreted by infiltrating cells act specifically upon targets on various components of the blood-brain barrier, compromising this barrier and allowing cell infiltration into the CNS. Extracellular matrix metalloproteinase inducer (EMMPRIN) is an upstream inducer of several MMPs and is suggested to be the master regulator of MMP production in disease states such as cancer metastasis. EMMPRIN in the context of the CNS is still relatively understudied. In this review we will introduce EMMPRIN, discuss its ligands and roles in non-CNS conditions that can help implicate its involvement in CNS disorders, showcase its expression within the CNS in healthy and disease conditions, elucidate its ligands and receptors, and briefly discuss the emerging roles it plays in various diseases of the CNS involving inflammation.
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Affiliation(s)
- Smriti M Agrawal
- Hotchkiss Brain Institute, Department of Clnical Neurosciences and Oncology, University of Calgary, Alberta, Canada
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Dal-Pan A, Blanc S, Aujard F. Resveratrol suppresses body mass gain in a seasonal non-human primate model of obesity. BMC PHYSIOLOGY 2010; 10:11. [PMID: 20569453 PMCID: PMC2903570 DOI: 10.1186/1472-6793-10-11] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 06/22/2010] [Indexed: 01/21/2023]
Abstract
Background Resveratrol, a natural polyphenolic compound, was shown to protect rodents against high-fat-diet induced diabesity by boosting energy metabolism. To the best of our knowledge, no data is yet available on the effects of resveratrol in non-human primates. Six non-human heterotherm primates (grey mouse lemurs, Microcebus murinus) were studied during four weeks of dietary supplementation with resveratrol (200 mg/kg/day) during their winter body-mass gain period. Body mass, spontaneous energy intake, resting metabolic rate, spontaneous locomotor activity and daily variations in body temperature were measured. In addition, the plasma levels of several gut hormones involved in satiety control were evaluated. Results Resveratrol reduced the seasonal body-mass gain by concomitantly decreasing energy intake by 13% and increasing resting metabolic rate by 29%. Resveratrol supplementation inhibited the depth of daily torpor, an important energy-saving process in this primate. The daily amount of locomotor activity remained unchanged. Except for an increase in the glucose-dependent insulinotropic polypeptide, a gut hormone known to promote mobilization of fat stores, no major change in satiety hormone plasma levels was observed under resveratrol supplementation. Conclusions These results suggest that in a non-human primate, resveratrol reduces body-mass gain by increasing satiety and resting metabolic rate, and by inhibiting torpor expression. The measured anorectic gut hormones did not seem to play a major role in these observations.
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Affiliation(s)
- Alexandre Dal-Pan
- Mécanismes Adaptatifs et Evolution, UMR 7179 Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle, Paris, France
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Palsamy P, Subramanian S. Ameliorative potential of resveratrol on proinflammatory cytokines, hyperglycemia mediated oxidative stress, and pancreatic beta-cell dysfunction in streptozotocin-nicotinamide-induced diabetic rats. J Cell Physiol 2010; 224:423-32. [PMID: 20333650 DOI: 10.1002/jcp.22138] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chronic exposure of pancreatic beta-cells to supraphysiologic glucose causes adverse beta-cell dysfunction. Thus, the present study was aimed to investigate the hypothesis that oral administration of resveratrol attenuates hyperglycemia, proinflammatory cytokines and antioxidant competence and protects beta-cell ultrastructure in streptozotocin-nicotinamide-induced diabetic rats. Oral administration of resveratrol (5 mg/kg body weight) to diabetic rats for 30 days showed a significant decline in the levels of blood glucose, glycosylated hemoglobin (HbA1c), TNF-alpha, IL-1beta, IL-6, NF-kappaB p65 unit and nitric oxide (NO) with concomitant elevation in plasma insulin. Further, resveratrol treated diabetic rats elicited a notable attenuation in the levels of lipid peroxides, hydroperoxides and protein carbonyls in both plasma and pancreatic tissues. The diminished activities of pancreatic superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx) and glutathione-S-transferase (GST) as well as the decreased levels of plasma ceruloplasmin, vitamin C, vitamin E and reduced glutathione (GSH) in diabetic rats were reverted to near normalcy by resveratrol administration. Based on histological and ultrastructural observations, it is first-time reported that the oral administration of resveratrol may effectively rescue beta-cells from oxidative damage without affecting their function and structural integrity. The results of the present investigation demonstrated that resveratrol exhibits significant antidiabetic potential by attenuating hyperglycemia, enhancing insulin secretion and antioxidant competence in pancreatic beta-cells of diabetic rats.
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Affiliation(s)
- P Palsamy
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu, India
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Abstract
According to the Homeric Hymn to Aphrodite, when Eos asked Zeus for Tithonus to be granted immortality, she forgot to ask for eternal youth. Applied Healthspan Engineering (AHE) seeks to address this problem. All organisms have a minimal level of functional reserve required to sustain life that eventually declines to a point incompatible with survival at death. AHE seeks to maintain or restore optimal functional reserve of critical tissues and organs. Tissue reserve correlates with well being. Diet, physical exercise, and currently available small-molecule-based therapeutics may attenuate the rate of decline of specific organs or organ systems, but are unlikely to restore lost reserve. Inherent evolutionary-derived limitations in tissue homeostasis and cell maintenance necessitate the development of therapies to enhance regenerative processes and possibly replace whole organs or tissues. AHE supports the study of cell, tissue, and organ homeostatic mechanisms to derive new regenerative and tissue replacement therapies to extend the period of human health.
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Affiliation(s)
- James W Larrick
- Panorama Research Institute and Regenerative Sciences Institute, Sunnyvale, California 94089, USA.
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Paulo L, Ferreira S, Gallardo E, Queiroz JA, Domingues F. Antimicrobial activity and effects of resveratrol on human pathogenic bacteria. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0325-7] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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