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Bleichman I, Hiram-Bab S, Gabet Y, Savion N. S-Allylmercapto-N-Acetylcysteine (ASSNAC) Attenuates Osteoporosis in Ovariectomized (OVX) Mice. Antioxidants (Basel) 2024; 13:474. [PMID: 38671921 PMCID: PMC11047400 DOI: 10.3390/antiox13040474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/11/2024] [Accepted: 04/13/2024] [Indexed: 04/28/2024] Open
Abstract
Osteoporosis is a bone-debilitating disease, demonstrating a higher prevalence in post-menopausal women due to estrogen deprivation. One of the main mechanisms underlying menopause-related bone loss is oxidative stress. S-allylmercapto-N-acetylcysteine (ASSNAC) is a nuclear factor erythroid 2-related factor 2 (Nrf2) activator and cysteine supplier, previously shown to have anti-oxidation protective effects in cultured cells and animal models. Here, we studied the therapeutic potential of ASSNAC with and without Alendronate in ovariectomized (OVX) female mice. The experimental outcome included (i) femur and L3 lumbar vertebra morphometry via Micro-Computed Tomography (μCT); (ii) bone remodeling (formation vs. resorption); and (iii) oxidative stress markers in bone marrow (BM) cells. Four weeks after OVX, there was a significant bone loss that remained evident after 8 weeks, as demonstrated via µCT in the femur (cortical and trabecular bone compartments) and vertebra (trabecular bone). ASSNAC at a dose of 50 mg/Kg/day prevented bone loss after the four-week treatment but had no significant effect after 8 weeks, while ASSNAC at a dose of 20 mg/Kg/day significantly protected against bone loss after 8 weeks of treatment. Alendronate prevented ovariectomy-induced bone loss, and combining it with ASSNAC further augmented this effect. OVX mice demonstrated high serum levels of both C-terminal cross-linked telopeptides of type I collagen (CTX) (bone resorption) and procollagen I N-terminal propeptide (P1NP) (bone formation) after 2 weeks, and these returned to control levels after 8 weeks. Alendronate, ASSNAC and their combination decreased CTX and increased P1NP. Alendronate induced oxidative stress as reflected by decreased glutathione and increased malondialdehyde (MDA) levels, and combining it with ASSNAC partially attenuated these changes. These results portray the therapeutic potential of ASSNAC for the management of post-menopausal osteoporosis. Furthermore, ASSNAC ameliorates the Alendronate-associated oxidative stress, suggesting its potential to prevent Alendronate side effects as well as improve its bone-protective effect.
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Affiliation(s)
- Itay Bleichman
- Department of Human Molecular Genetics and Biochemistry and Goldschleger Eye Research Institute, School of Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel-Aviv 6997801, Israel;
| | - Sahar Hiram-Bab
- Department of Anatomy and Anthropology, School of Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel-Aviv 6997801, Israel; (S.H.-B.); (Y.G.)
| | - Yankel Gabet
- Department of Anatomy and Anthropology, School of Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel-Aviv 6997801, Israel; (S.H.-B.); (Y.G.)
| | - Naphtali Savion
- Department of Human Molecular Genetics and Biochemistry and Goldschleger Eye Research Institute, School of Medicine, Faculty of Medical and Health Sciences, Tel Aviv University, Tel-Aviv 6997801, Israel;
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Kara M, Boran T, Öztaş E, Jannuzzi AT, Özden S, Özhan G. Zoledronic acid-induced oxidative damage and endoplasmic reticulum stress-mediated apoptosis in human embryonic kidney (HEK-293) cells. J Biochem Mol Toxicol 2022; 36:e23083. [PMID: 35587103 DOI: 10.1002/jbt.23083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 02/07/2022] [Accepted: 03/01/2022] [Indexed: 11/06/2022]
Abstract
Zoledronic acid, a nitrogen-containing bisphosphonate drug, is used for the treatment of osteoporosis, Paget's disease of bone, and tumor-induced osteolysis. Zoledronic acid has also gained a place in cancer treatment due to its cytotoxic and antiproliferative effects in many cancer cells. Although zoledronic acid is considered safe, kidney damage is still one of the concerns in therapeutic doses. In the study, the aim was to assess the nephrotoxic profiles of zoledronic acid in the human embryonic kidney (HEK-293) cells. Cytotoxicity evaluation was performed by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide (MTT) and neutral red uptake tests, while oxidative stress was performed by reactive oxygen species (ROS) production via flow cytometry, and the incomprehensible evaluation of ROS-related genes by RT-PCR and apoptosis was performed with Annexin-PI analysis in flow cytometry. The obtained result showed that zoledronic acid inhibited cell viability (IC50 values were determined as 273.16 by MTT) and cell proliferation in a concentration-dependent manner, induced ROS production, caused glutathione depletion, and increased oxidative stress index and endoplasmic reticulum (ER) stress, indicating severe cellular stress. The expression levels of oxidative damage (L-fabp, α-GST, Nrf2, and HMOX1), ER stress (CASP4, IRE1-α, GADD153, and GRP78), and apoptosis (Bcl-2, Bax, Cyt-c, p53, CASP9, CASP3, NF-κB, TNF-α, and JNK) related genes were altered as well as IRE1-α protein levels. Herein, we were the first to show that increased oxidative stress and ER stress resulting in apoptosis are the key molecular pathways in zoledronic acid-induced nephrotoxicity equivalent to clinically administered concentrations.
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Affiliation(s)
- Mehtap Kara
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Tuğçe Boran
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Ezgi Öztaş
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Ayse Tarbin Jannuzzi
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Sibel Özden
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Gül Özhan
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
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Allegra A, Petrarca C, Di Gioacchino M, Casciaro M, Musolino C, Gangemi S. Modulation of Cellular Redox Parameters for Improving Therapeutic Responses in Multiple Myeloma. Antioxidants (Basel) 2022; 11:antiox11030455. [PMID: 35326105 PMCID: PMC8944660 DOI: 10.3390/antiox11030455] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 01/25/2023] Open
Abstract
Raised oxidative stress and abnormal redox status are typical features of multiple myeloma cells, and the identification of the intimate mechanisms that regulate the relationships between neoplastic cells and redox homeostasis may reveal possible new anti-myeloma therapeutic targets to increase the effectiveness of anti-myeloma drugs synergistically or to eradicate drug-resistant clones while reducing toxicity toward normal cells. An alteration of the oxidative state is not only responsible for the onset of multiple myeloma and its progression, but it also appears essential for the therapeutic response and for developing any chemoresistance. Our review aimed to evaluate the literature’s current data on the effects of oxidative stress on the response to drugs generally employed in the therapy of multiple myeloma, such as proteasome inhibitors, immunomodulators, and autologous transplantation. In the second part of the review, we analyzed the possibility of using other substances, often of natural origin, to modulate the oxidative stress to interfere with the progression of myelomatous disease.
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Affiliation(s)
- Alessandro Allegra
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood “Gaetano Barresi”, University of Messina, 98125 Messina, Italy;
- Correspondence: (A.A.); (M.D.G.)
| | - Claudia Petrarca
- Center for Advanced Studies and Technology, G. D’Annunzio University, 66100 Chieti, Italy;
- Institute for Clinical Immunotherapy and Advanced Biological Treatments, 65100 Pescara, Italy
| | - Mario Di Gioacchino
- Center for Advanced Studies and Technology, G. D’Annunzio University, 66100 Chieti, Italy;
- Institute for Clinical Immunotherapy and Advanced Biological Treatments, 65100 Pescara, Italy
- Correspondence: (A.A.); (M.D.G.)
| | - Marco Casciaro
- Unit and School of Allergy and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.); (S.G.)
| | - Caterina Musolino
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood “Gaetano Barresi”, University of Messina, 98125 Messina, Italy;
| | - Sebastiano Gangemi
- Unit and School of Allergy and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.); (S.G.)
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Dada FA, Oyeleye SI, Adefegha SA, Babatola LJ, Adebayo A. Evaluation of different almond ( Terminalia catappa) extracts against oxidative stress induced by cyclosporine in brain and liver of rats. J Complement Integr Med 2021; 18:727-735. [PMID: 33852232 DOI: 10.1515/jcim-2020-0193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/21/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVES This study was designed to evaluate the ameliorative effect of almond (Terminalia catappa) leaf (ALE) and stem bark (ABE) extracts on the enzyme activities and oxidative stress markers in the brain and liver tissues of cyclosporine-A (CsA) stressed male albino rats. METHODS Eighty-eight adult male rats weighing between 200 and 220 g were randomly distributed to into 11 groups (n=8) and different doses (100 and 200 mg/kg bwt.) of ALE and ABE were administered through oral gavages to the normal rats and 50 mg/kg/bwt/day CsA-stressed, while normal control rats was given a saline solution (p.o), and the treatment lasted for 14 days. Blood plasma, liver and brain tissues were prepared for biochemical analysis. RESULTS Neuronal [acetylcholinesterase (AChE) and butrylcholinesterase (BChE) and arginase] enzyme activities and thiobarbituric acid reactive species (TBARS) level, plasma aspartate transferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP) activities, liver non-protein thiol (NPSH) level were analyzed. The results revealed that, the administration of CsA induced a significant increase in neuronal AChE, BChE, arginase, TBARS level, but decreased nitric oxide (NO) level. CsA also increased ALT, AST, and ALP activities in the blood plasma of CsA stress rats compared to normal control, but were significantly reversed respectively (p<0.001) upon treatment with the ALE and ABE dose-dependently. CONCLUSIONS The study revealed that ALE and ABE could prevent neuronal dysfunction and liver toxicity induced by CsA administration, however, higher dose (200 mg/kg) of the studied extracts appears to be more potent.
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Affiliation(s)
- Felix Abayomi Dada
- Science Laboratory Technology Department (Biochemistry Unit), Federal Polytechnic Ede, Ede, Osun State, Nigeria
| | - Sunday Idowu Oyeleye
- Functional Foods and Nutraceuticals Research Laboratory, Biochemistry Department, Federal University of Technology, Akure, Nigeria
- Department of Biomedical Technology, Federal University of Technology, Akure, Nigeria
| | - Stephen Adeniyi Adefegha
- Functional Foods and Nutraceuticals Research Laboratory, Biochemistry Department, Federal University of Technology, Akure, Nigeria
| | - Leye Jonathan Babatola
- Department of Chemical Sciences, Joseph Ayo Babalola University, Ikeji Arakeji, Osun State, Nigeria
| | - Adeniyi Adebayo
- Department of Chemical Sciences, Joseph Ayo Babalola University, Ikeji Arakeji, Osun State, Nigeria
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Wu SL, Cheng CN, Wang CC, Lin SW, Kuo CH. Metabolomics analysis of plasma reveals voriconazole-induced hepatotoxicity is associated with oxidative stress. Toxicol Appl Pharmacol 2020; 403:115157. [PMID: 32717240 DOI: 10.1016/j.taap.2020.115157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/06/2020] [Accepted: 07/20/2020] [Indexed: 02/08/2023]
Abstract
Voriconazole is one of the most frequently used antifungal drugs for the initial treatment of invasive aspergillosis, but liver-related adverse events occur frequently and usually lead to drug discontinuation. Moreover, the mechanism of voriconazole-induced hepatotoxicity remains unsettled. A holistic understanding of its mechanism is critical to prevent liver-related adverse events. Metabolomics has been demonstrated to be a helpful strategy for investigating drug-induced toxicity. This study aimed to utilize human plasma samples to investigate the mechanism of voriconazole-induced hepatotoxicity through a metabolomics approach. Patients that were administered voriconazole were classified into a voriconazole-induced hepatotoxicity group and control group (n = 65, 18% hepatotoxicity). Plasma samples were analyzed by targeted metabolomics using ultra-performance liquid chromatography coupled with triple quadrupole mass spectrometry. The obtained peak areas for each metabolite were utilized for correlation analysis, fold change evaluation, and univariate statistical tests to identify metabolites associated with voriconazole-induced hepatotoxicity. This study showed a significantly lower glutamine-to-glutamate ratio (p = .04) and a higher β-N-acetylglucosamine (p = .003) in the voriconazole-induced hepatotoxicity group, implying the presence of oxidative stress. Other significant metabolites also indicated several adaptive responses to oxidative stress in patients with voriconazole-induced toxicity, including cell repair, energy production, and alteration to bile acid hemostasis. Furthermore, a metabolite panel consisting of α-ketoglutarate, glycocholate, and β-N-acetylglucosamine demonstrated better performance for detecting voriconazole-induced hepatotoxicity than conventional liver function tests. These metabolomics findings reveal that voriconazole-induced hepatotoxicity is associated with oxidative stress.
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Affiliation(s)
- Shin-Lun Wu
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chih-Ning Cheng
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chi-Chuan Wang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Pharmacy, National Taiwan University Hospital, Taipei, Taiwan
| | - Shu-Wen Lin
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Pharmacy, National Taiwan University Hospital, Taipei, Taiwan.
| | - Ching-Hua Kuo
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Pharmacy, National Taiwan University Hospital, Taipei, Taiwan; Centers of Genomic and Precision Medicine, National Taiwan University, Taipei, Taiwan.
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Alomar MY. Physiological and histopathological study on the influence of Ocimum basilicum leaves extract on thioacetamide-induced nephrotoxicity in male rats. Saudi J Biol Sci 2020; 27:1843-1849. [PMID: 32565705 PMCID: PMC7296500 DOI: 10.1016/j.sjbs.2020.05.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 05/16/2020] [Accepted: 05/19/2020] [Indexed: 12/25/2022] Open
Abstract
Kidney disease is a worldwide public health problem that affects millions of people worldwide. Globally, many risk factors for kidney disease progression have been identified. The global prevalence of acute and chronic forms of kidney disease is rising continuously. Nephrotoxicity is defined as rapid dysfunction of kidney due to toxic influence of medications and chemicals. Nephroprotective agents are material that has potential to minimize the effects of nephrotoxic agents. Plants have been shown to be potential therapeutic agents to protect against nephrotoxicity. The purpose of the present study was to evaluate the nephroprotective effect of basil leaves extract against thioacetamide (TAA) in male rats. Experimental male rats were divided into four groups. Rats of the first group were served as controls. Rats of the second group were exposed to TAA. Rats of the third group were treated with basil leaves extract and TAA. Rats of the fourth group were treated with basil leaves extract. After the end of experimental duration (6 Weeks), rats of the second group showed significantly increases of serum creatinine, blood urea nitrogen and uric acid levels, while the levels of serum superoxide dismutase and glutathione were significantly decreased. Histopathologically, renal sections from rats treated with only TAA showed several alterations in the structure of most renal corpuscles including a degeneration of glomeruli and Bowman's capsules. Treatment with basil leaves extract improved the observed biochemical and histopathological changes induced by TAA intoxication. These new findings indicate that the extract of basil leaves represent protective roles on biochemical and histopathological changes induced by TAA toxicity due to its antioxidant activities.
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Affiliation(s)
- Mohammed Y Alomar
- Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.,Princess Dr. Najla Bint Saud Al-Saud Center for Excellence Research in Biotechnology, King Abdulaziz University, Jeddah, Saudi Arabia
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Pócs L, Janovszky Á, Ocsovszki I, Kaszaki J, Piffkó J, Szabó A. Microcirculatory consequences of limb ischemia/reperfusion in ovariectomized rats treated with zoledronic acid. J Orthop Surg Res 2019; 14:95. [PMID: 30947735 PMCID: PMC6450009 DOI: 10.1186/s13018-019-1117-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/06/2019] [Indexed: 12/12/2022] Open
Abstract
Background Nitrogen-containing bisphosphonates (BIS) are potent therapeutics in osteoporosis, but their use may result in osteonecrotic side-effects in the maxillofacial region. Periosteal microcirculatory reactions may contribute to the development of bone-healing complications, particularly in osteoporotic bones, where ischemia–reperfusion (IR) events often develop during orthopaedic/trauma interventions. The effect of BIS on the inflammatory reactions of appendicular long bones has not yet been evaluated; thus, we aimed to examine the influence of chronic zoledronate (ZOL) administration on the periosteal microcirculatory consequences of hindlimb IR in osteopenic rats. Materials and methods Twelve-week-old female Sprague–Dawley rats were ovariectomized (OVX) or sham-operated, and ZOL (80 μg/kg iv, weekly) or a vehicle was administered for 8 weeks, 4 weeks after the operation. At the end of the pre-treatment protocols, 60-min limb ischemia was induced, followed by 180-min reperfusion. Leukocyte-endothelial interactions were quantitated in tibial periosteal postcapillary venules by intravital fluorescence videomicroscopy. CD11b expression of circulating polymorphonuclear leukocytes (PMN, flow cytometry) and plasma TNF-alpha levels (ELISA) were also determined. Two-way RM ANOVA followed by the Holm–Sidak and Dunn tests was used to assess differences within and between groups, respectively. Results Limb IR induced significant increases in PMN rolling and firm adhesion in sham-operated and OVX rats, which were exacerbated temporarily in the first 60 min of reperfusion by a ZOL treatment regimen. Postischemic TNF-alpha values showed a similar level of postischemic elevations in all groups, whereas CD11b expression only increased in rats not treated with ZOL. Conclusions The present data do not show substantial postischemic periosteal microcirculatory complications after chronic ZOL treatment either in sham-operated or OVX rats. The unaltered extent of limb IR-induced local periosteal microcirculatory reactions in the presence of reduced CD11b adhesion molecule expression on circulating PMNs, however, may be attributable to local endothelial injury/activation caused by ZOL.
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Affiliation(s)
- Levente Pócs
- Department of Traumatology and Hand Surgery, Bács-Kiskun County Teaching Hospital, Nyíri u. 38, Kecskemét, H-6000, Hungary
| | - Ágnes Janovszky
- Department of Oral and Maxillofacial Surgery, University of Szeged, Kálvária sgt. 57, Szeged, H-6725, Hungary
| | - Imre Ocsovszki
- Department of Biochemistry, University of Szeged, Dóm tér 9, Szeged, H-6720, Hungary
| | - József Kaszaki
- Department of Oral and Maxillofacial Surgery, University of Szeged, Kálvária sgt. 57, Szeged, H-6725, Hungary
| | - József Piffkó
- Department of Oral and Maxillofacial Surgery, University of Szeged, Kálvária sgt. 57, Szeged, H-6725, Hungary
| | - Andrea Szabó
- Institute of Surgical Research, University of Szeged, Pulz u. 1, Szeged, H-6724, Hungary.
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Farzaei MH, Zobeiri M, Parvizi F, El-Senduny FF, Marmouzi I, Coy-Barrera E, Naseri R, Nabavi SM, Rahimi R, Abdollahi M. Curcumin in Liver Diseases: A Systematic Review of the Cellular Mechanisms of Oxidative Stress and Clinical Perspective. Nutrients 2018; 10:E855. [PMID: 29966389 PMCID: PMC6073929 DOI: 10.3390/nu10070855] [Citation(s) in RCA: 209] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 06/23/2018] [Accepted: 06/28/2018] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress has been considered a key causing factor of liver damage induced by a variety of agents, including alcohol, drugs, viral infections, environmental pollutants and dietary components, which in turn results in progression of liver injury, non-alcoholic steatohepatitis, non-alcoholic liver disease, liver fibrosis and cirrhosis. During the past 30 years and even after the major progress in the liver disease management, millions of people worldwide still suffer from an acute or chronic liver condition. Curcumin is one of the most commonly used indigenous molecules endowed by various shielding functionalities that protects the liver. The aim of the present study is to comprehensively review pharmacological effects and molecular mechanisms, as well as clinical evidence, of curcumin as a lead compound in the prevention and treatment of oxidative associated liver diseases. For this purpose, electronic databases including “Scopus,” “PubMed,” “Science Direct” and “Cochrane library” were extensively searched with the keywords “curcumin or curcuminoids” and “hepatoprotective or hepatotoxicity or liver” along with “oxidative or oxidant.” Results showed that curcumin exerts remarkable protective and therapeutic effects of oxidative associated liver diseases through various cellular and molecular mechanisms. Those mechanisms include suppressing the proinflammatory cytokines, lipid perodixation products, PI3K/Akt and hepatic stellate cells activation, as well as ameliorating cellular responses to oxidative stress such as the expression of Nrf2, SOD, CAT, GSH, GPx and GR. Taking together, curcumin itself acts as a free radical scavenger over the activity of different kinds of ROS via its phenolic, β-diketone and methoxy group. Further clinical studies are still needed in order to recognize the structure-activity relationships and molecular mechanisms of curcumin in oxidative associated liver diseases.
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Affiliation(s)
- Mohammad Hosein Farzaei
- Pharmaceutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran.
| | - Mahdi Zobeiri
- Internal Medicine Department, Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran.
| | - Fatemeh Parvizi
- Pharmaceutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran.
| | - Fardous F El-Senduny
- Biochemistry division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - Ilias Marmouzi
- Laboratory of Pharmacology and Toxicology Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Rabat 10100, Morocco.
| | - Ericsson Coy-Barrera
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 250247, Colombia.
| | - Rozita Naseri
- Internal Medicine Department, Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran.
| | - Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baghyatollah University of Medical Sciences, Tehran 1435916471, Iran.
| | - Roja Rahimi
- Department of Persian Pharmacy, School of Traditional Medicine, Tehran University of Medical Sciences, Tehran 1416663361, Iran.
| | - Mohammad Abdollahi
- Toxicology and Diseases Group, The Institute of Pharmaceutical Sciences (TIPS) and Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
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Kalantari H, Foruozandeh H, Khodayar MJ, Siahpoosh A, Saki N, Kheradmand P. Antioxidant and hepatoprotective effects of Capparis spinosa L. fractions and Quercetin on tert-butyl hydroperoxide- induced acute liver damage in mice. J Tradit Complement Med 2018; 8:120-127. [PMID: 29321999 PMCID: PMC5755993 DOI: 10.1016/j.jtcme.2017.04.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/29/2017] [Accepted: 04/30/2017] [Indexed: 02/07/2023] Open
Abstract
The present study investigates the antioxidant and hepatoprotective effects of Capparis spinosa L. and Quercetin in tert-butyl hydroperoxide (t-BHP) induced acute liver damage. Different fractions of C. spinosa were examined for total phenolic content and antioxidant property. Among these fractions, hydroalcoholic extract was used to assess the hepatoprotective effect in tert-butyl hydroperoxide (t-BHP) induced hepatotoxicity model by determining serum biochemical markers, sleeping time and antioxidant assay such as reduced glutathione (GSH) as well as histopathological examination of liver tissues. The total phenolic and Quercetin contents of hydroalcoholic fraction were significantly higher than other fractions. It also showed high antioxidant activity. Pretreatment with hydroalcoholic fraction at the dose of 400 mg/kg and Quercetin at the dose of 20 mg/kg showed liver protection against t-BHP induced hepatic injury, as it was evident by a significant decrease in serum enzymes marker, sleeping time and MDA and an increase in the GSH, SOD and CAT activities confirmed by pathology tests. The final results ascertained the hepatoprotective and antioxidant effects of C. spinosa and Quercetin in a dose-dependent manner. Moreover, this study suggests that possible mechanism of this protection may be associated with its property of scavenging free radicals which may be due to the presence of phenolic compounds.
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Affiliation(s)
- Heibatullah Kalantari
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hossein Foruozandeh
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Javad Khodayar
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Amir Siahpoosh
- Medicinal Plants Research Center, Department of Pharmacognosy, School of Pharmacy, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
| | - Najmaldin Saki
- Health Research Institute, Research Center of Thalassemia & Hemoglobinopathy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Parvin Kheradmand
- Department of Pathology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Arun MZ, Reel B, Sala-Newby GB, Bond M, Tsaousi A, Maskell P, Newby AC. Zoledronate upregulates MMP-9 and -13 in rat vascular smooth muscle cells by inducing oxidative stress. Drug Des Devel Ther 2016; 10:1453-60. [PMID: 27143852 PMCID: PMC4841407 DOI: 10.2147/dddt.s103124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Bisphosphonates, including zoledronate, target osteoclasts and are widely used in the treatment of osteoporosis and other bone resorption diseases, despite side effects that include damaging the stomach epithelium. Beneficial and adverse effects on other organ systems, including the cardiovascular system, have also been described and could impact on the use of bisphosphonates as therapeutic agents. Vascular smooth muscle cells (VSMCs) are major constituents of the normal vascular wall and have a key role in intimal thickening and atherosclerosis, in part by secreting MMPs that remodel the extracellular matrix and cleave cell surface proteins or secreted mediators. In this study, we investigated the effects of zoledronate on MMP expression. Methods Rat VSMCs were stimulated by PDGF (50 ng/mL) plus TNF-α (10 ng/mL) or left unstimulated for a further 24 hours in serum-free medium. In other series of experiments, cells were pre-treated either with SC-514 (50 μM) or with apocynin (20 nM) for 2 hours, then zoledronate (100 μM) was added into 2% fetal calf serum containing medium for 24 hours. Results and discussion Using isolated rat VSMCs in culture, zoledronate (100 μM) increased MMP-9 and -13 mRNA expressions but inhibited MMP-2 expression. MMP-9 and MMP-13 up-regulation was shown to depend on the NF-κB pathway; and this was activated by zoledronate. Furthermore, zoledronate elevated the levels of reactive oxygen species detected by either dichlorofluorescein in isolated VSMCs or lucigenin enhanced chemiluminescence in rat aortic rings in vitro. Apocynin, an inhibitor of NADPH oxidase, reversed NF-κB activation and MMP-9 and MMP-13 up-regulation by zoledronate. Conclusion We conclude that zoledronate increases MMP-9 and MMP-13 expressions in rat VSMCs dependent upon stimulation of the NF-κB pathway by reactive oxygen species. Effects on MMP expression may contribute to the pharmacologic profile of bisphosphonates.
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Affiliation(s)
- Mehmet Zuhuri Arun
- Department of Pharmacology, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Buket Reel
- Department of Pharmacology, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Graciela B Sala-Newby
- Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, Bristol, UK
| | - Mark Bond
- Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, Bristol, UK
| | - Aikaterini Tsaousi
- Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, Bristol, UK
| | - Perry Maskell
- Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, Bristol, UK
| | - Andrew C Newby
- Bristol Heart Institute, University of Bristol, Bristol Royal Infirmary, Bristol, UK
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Lopez-Morata JA, Olivares A, Alcaraz M. [Decrease in toxicity and therapeutic effect of zoledronic acid in combination therapy with different antioxidant extracts]. Rev Esp Geriatr Gerontol 2016; 51:329-334. [PMID: 26948964 DOI: 10.1016/j.regg.2016.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 01/18/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND Zoledronic acid is used in the treatment of cancer-related diseases, although its use has been associated with avascular osteonecrosis. AIMS To determine the possible protective effect of a range of antioxidant substances against the inhibition of human prostate epithelial cell growth (PNT2) and transgenic adenocarcinoma mouse prostate tumour cells (TRAMP-C1), in treatments combining zoledronic acid and ionising radiation (IR). MATERIAL AND METHOD Cell survival is studied via cell viability assays (MTT) for 2 cell lines in isolated and combined treatments with zoledronic acid and/or IR, as well as the effect of adding 3 antioxidant substances. RESULTS Zoledronic acid displays a significant cytotoxic effect over PNT2 and TRAMP-C1 cells (P<.001). The administration of antioxidants together with the zoledronic acid shows a protective effect for normal prostate cells, yet not so for prostate tumour cells. However, the administration of rosmarinic acid and apigenin in treatments combined with zoledronic acid provides a protective effect from the harmful effects of applying ionizing radiation, not only for normal PNT2 cells, but also for tumour cells. CONCLUSION The use of antioxidant substances decreases the cytotoxic effect of zoledronic acid over non-tumour cells, and as such could be used in benign diseases. Furthermore, in the combined treatment using ionising radiation, these antioxidants also produced a protective effect in tumour cells, thus reducing the therapeutic effect sought by combining the treatment with radiation.
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Affiliation(s)
- José Antonio Lopez-Morata
- Departamento de Radiología, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España; Departamento de Medicina Física, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España
| | - Amparo Olivares
- Departamento de Radiología, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España; Departamento de Medicina Física, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España
| | - Miguel Alcaraz
- Departamento de Radiología, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España; Departamento de Medicina Física, Facultad de Medicina/Odontología, Universidad de Murcia, Campus Espinardo, Murcia, España.
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Li S, Tan HY, Wang N, Zhang ZJ, Lao L, Wong CW, Feng Y. The Role of Oxidative Stress and Antioxidants in Liver Diseases. Int J Mol Sci 2015; 16:26087-124. [PMID: 26540040 PMCID: PMC4661801 DOI: 10.3390/ijms161125942] [Citation(s) in RCA: 913] [Impact Index Per Article: 101.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 09/20/2015] [Accepted: 10/19/2015] [Indexed: 12/15/2022] Open
Abstract
A complex antioxidant system has been developed in mammals to relieve oxidative stress. However, excessive reactive species derived from oxygen and nitrogen may still lead to oxidative damage to tissue and organs. Oxidative stress has been considered as a conjoint pathological mechanism, and it contributes to initiation and progression of liver injury. A lot of risk factors, including alcohol, drugs, environmental pollutants and irradiation, may induce oxidative stress in liver, which in turn results in severe liver diseases, such as alcoholic liver disease and non-alcoholic steatohepatitis. Application of antioxidants signifies a rational curative strategy to prevent and cure liver diseases involving oxidative stress. Although conclusions drawn from clinical studies remain uncertain, animal studies have revealed the promising in vivo therapeutic effect of antioxidants on liver diseases. Natural antioxidants contained in edible or medicinal plants often possess strong antioxidant and free radical scavenging abilities as well as anti-inflammatory action, which are also supposed to be the basis of other bioactivities and health benefits. In this review, PubMed was extensively searched for literature research. The keywords for searching oxidative stress were free radicals, reactive oxygen, nitrogen species, anti-oxidative therapy, Chinese medicines, natural products, antioxidants and liver diseases. The literature, including ours, with studies on oxidative stress and anti-oxidative therapy in liver diseases were the focus. Various factors that cause oxidative stress in liver and effects of antioxidants in the prevention and treatment of liver diseases were summarized, questioned, and discussed.
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Affiliation(s)
- Sha Li
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Hor-Yue Tan
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Ning Wang
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Zhang-Jin Zhang
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Lixing Lao
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Chi-Woon Wong
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | - Yibin Feng
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
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Ge M, Yao W, Wang Y, Yuan D, Chi X, Luo G, Hei Z. Propofol alleviates liver oxidative stress via activating Nrf2 pathway. J Surg Res 2015; 196:373-81. [DOI: 10.1016/j.jss.2015.03.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/09/2015] [Accepted: 03/11/2015] [Indexed: 12/14/2022]
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Karabulut AB, Karadag N, Gurocak S, Kiran T, Tuzcu M, Sahin K. Apricot attenuates oxidative stress and modulates of Bax, Bcl-2, caspases, NFκ-B, AP-1, CREB expression of rats bearing DMBA-induced liver damage and treated with a combination of radiotherapy. Food Chem Toxicol 2014; 70:128-33. [PMID: 24819963 DOI: 10.1016/j.fct.2014.04.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/29/2014] [Accepted: 04/22/2014] [Indexed: 11/26/2022]
Abstract
We evaluated the ability of apricot to attenuate apoptosis and oxidative stress developed during the process of 7,12-dimethylbenz[a]anthracene (DMBA) and radiotherapy in the liver of rats bearing liver damage. Fifty female Wistar rats were divided into 7 groups; (i) normal control rats; (ii) rats fed with standard diet with apricot (20%), (ii) rats fed with standard diet and administrated 6 gray radiotherapy with Co 60 device applied to a single fraction, (iv) rats fed with standard diet and administered intraperitoneally DMBA (20mg/kg), (v) rats fed with standard diet and administered DMBA and 6 gray radiotherapy, (vi) rats fed with standard rat diet and administered DMBA and supplemented apricot, (vii) rats fed with standard diet supplemented apricot administered DMBA and radiotherapy (RT) for 6weeks. Expression of Bax, caspase 3, and glutathione activity decreased in the liver but liver expression of NF-κB, AP-1, CREB, Bcl-2 and ALT, AST, 5'NT, MDA, NO levels increased in DMBA-induced liver damage rats. In conclusion, the results suggest that apricot supplementation and irradiation given in combination, offer maximum protection against DMBA-induced hepatic carcinogenesis.
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Affiliation(s)
- Aysun Bay Karabulut
- Department of Biochemistry, Faculty of Medicine, Inonu University, 44280 Malatya, Turkey.
| | - Nese Karadag
- Department of Pathology, Faculty of Medicine, Inonu University, 44280 Malatya, Turkey
| | - Simay Gurocak
- Department of Radiation Oncology, Faculty of Medicine, Inonu University, 44280 Malatya, Turkey
| | - Tugba Kiran
- Department of Biochemistry, Faculty of Medicine, Inonu University, 44280 Malatya, Turkey
| | - Mehmet Tuzcu
- Division of Biology, Faculty of Science, Firat University, 23119 Elazig, Turkey
| | - Kazım Sahin
- Department of Nutrition, Faculty of Fisheries, Inonu University, 44280 Malatya, Turkey; Department of Animal Nutrition, Faculty of Veterinary, Firat University, 23119 Elazig, Turkey
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Bagan J, Sáez GT, Tormos MC, Gavalda-Esteve C, Bagan L, Leopoldo-Rodado M, Calvo J, Camps C. Oxidative stress in bisphosphonate-related osteonecrosis of the jaws. J Oral Pathol Med 2014; 43:371-7. [PMID: 24450511 DOI: 10.1111/jop.12151] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2013] [Indexed: 12/21/2022]
Abstract
OBJECTIVES To analyze whether oxidative stress (OS) changes are present in patients with bisphosphonate-related osteonecrosis of the jaw (BRONJ) versus controls. MATERIALS AND METHODS Oxidative stress was analyzed in serum and unstimulated saliva of three groups: Group 1 consisted of 24 patients who had been treated with intravenous bisphosphonates (ivBPs) and developed BRONJ, group 2 consisted of 20 patients who had received ivBPs and did not develop BRONJ, and group 3 comprised 17 control subjects. Reduced glutathione (GSH), malondialdehyde (MDA), oxidized glutathione (GSSG), and 8-oxo-7,8-dihydro-2-deoxyguanosine (8-oxo-dG) levels, as well as the GSSG/GSH ratio, were measured. RESULTS Mean serum and saliva levels of MDA, GSSG, and 8-oxo-dG and the GSSG/GSH ratio were significantly higher in patients with BRONJ than in controls. We found no significant difference in OS according to BRONJ stage, sex, or location in the jaws. Logistic regression analysis revealed that the GSSG/GSH ratio was a significant factor predicting the development of BRONJ (P = 0.01). CONCLUSIONS Oxidative stress was detected in patients with BRONJ, and the GSSG/GSH ratio was the most significant OS variable found; it was a significant factor predicting the development of BRONJ.
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Affiliation(s)
- Jose Bagan
- Department of Oral Medicine, Valencia University, Valencia, Spain; Service of Stomatology and Maxillofacial Surgery, University General Hospital, Valencia, Spain
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Polidoro S, Broccoletti R, Campanella G, Di Gaetano C, Menegatti E, Scoletta M, Lerda E, Matullo G, Vineis P, Berardi D, Scully C, Arduino PG. Effects of bisphosphonate treatment on DNA methylation in osteonecrosis of the jaw. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2013; 757:104-13. [DOI: 10.1016/j.mrgentox.2013.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/12/2013] [Accepted: 07/16/2013] [Indexed: 02/06/2023]
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Koçer G, Nazıroğlu M, Çelik Ö, Önal L, Özçelik D, Koçer M, Sönmez TT. Basic fibroblast growth factor attenuates bisphosphonate-induced oxidative injury but decreases zinc and copper levels in oral epithelium of rat. Biol Trace Elem Res 2013; 153:251-6. [PMID: 23572387 DOI: 10.1007/s12011-013-9659-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 03/27/2013] [Indexed: 12/11/2022]
Abstract
Recent studies have reported oxidative damage due to bisphosphonate (BP) in various cancer tissues and neurons, although basic fibroblast growth factor (bFGF) induced antioxidant effects in the cells. The bFGF may modulate the BP-induced oxidative stress in oral epithelium of rats. This study was undertaken to explore possible beneficial antioxidant effects of bFGF on oxidative stress induced by BP in oral epithelium of rats. Twenty-eight rats were equally divided into four groups. The first group was used as control. The second, third and fourth groups intraperitoneally received BP (zoledronic acid), bFGF and BP + bFGF. At the end of 10 weeks, the rats were sacrificed, and oral epithelium samples were taken for analyses. In BP group, the lipid peroxidation levels were increased in the oral epithelium, while the activities of glutathione peroxidase (GSH-Px) and the concentrations of total antioxidant status (TAS) were decreased. In rats treated with bFGF, lipid peroxidation levels decreased, and the activities of GSH-Px and concentrations of TAS improved in the oral epithelium. However, zinc and copper levels were decreased in the oral epithelium by BP and bFGF treatments. Concentrations of vitamin E and reduced glutathione in the samples did not change in the groups. In conclusion, treatment with bFGF modulated the antioxidant redox system and reduced the oral epithelium oxidative stress induced by BP. However, zinc and copper levels were decreased by BP and bFGF treatments.
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Affiliation(s)
- Gülperi Koçer
- Department of Oral and Maxillofacial Surgery, Dentistry Faculty, Suleyman Demirel University, Isparta, Turkey
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Alcaraz M, Olivares A, Armero D, Alcaraz-Saura M, Achel D. Zoledronic acid and radiation: toxicity, synergy or radiosensitization? Clin Transl Oncol 2012; 15:300-6. [PMID: 23443898 DOI: 10.1007/s12094-012-0917-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Accepted: 07/09/2012] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Zoledronic acid (Z) is a bisphosphonate used in hypercalcaemia-related cancer, in complications for bone metastasis and in postmenopausal osteoporosis and it has been related to osteoradionecrosis, especially when associated with radiation to the head and neck structures. OBJECTIVES To determine the radiosensitization capacity of zoledronic acid in the combined treatment with ionizing radiation (IR) by evaluating its genotoxic and cytotoxic capacities in non-tumoral cells. MATERIALS AND METHODS The genotoxic effect of Z was studied by means of the micronucleus test in cytokinesis-blocked cells of human lymphocytes irradiated before and after a 2 Gy irradiation, while the cytotoxic effect was studied by a cell viability test in the PNT2 cell line before and after exposure to different X-ray doses (0-20 Gy) in four groups (Z alone, radiation alone, Z + IR and IR + Z). RESULTS A dose-dependent and time-dependent cytotoxic effect of Z and IR on PNT2 cells in vitro (p > 0.001) was demonstrated. With the concentrations recommended for humans, the combined treatment had a more pronounced effect than individual treatments (p < 0.001). The effect was synergic (CI < 1), increasing the Z enhancement ratio (2.6) and sensitization factor (56 %); the effect of Z was always greater after IR exposure. In the genotoxic effect, only the administration of Z after irradiation (IR + Z) increased chromosome damage (p < 0.001) and the sensibilization factor (35.7 %). CONCLUSION High concentrations of Z are toxic, but the concentrations recommended for clinical practice in humans give it the characteristics of a radiosensitization agent, whose effect is even greater when administered after IR.
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Affiliation(s)
- M Alcaraz
- Radiology and Physical Medicine Department, Faculty of Medicine/Dentistry, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
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