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Li Y, Wang W, Deng Y, Gao J, Shi J, Cai L. Antioxidant properties and changes in vitro digestion of the fermented kiwifruit extract prepared by lactic acid bacteria and yeasts. Food Chem 2024; 442:138416. [PMID: 38241988 DOI: 10.1016/j.foodchem.2024.138416] [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: 10/13/2023] [Revised: 01/07/2024] [Accepted: 01/09/2024] [Indexed: 01/21/2024]
Abstract
The health benefits of fermented fruits have attracted consumers' attention. High levels of antioxidant ability in the fermented kiwifruit extract were found at the early stage of fermentation. The co-fermention with Lactobacillus paracasei LG0260 and Kluyveromyces marxianus J2853 showed the highest ABTS radical scavenging ability (ABTS⋅+-SA) and superoxide dismutase (SOD) activity. Also, the typical antioxidant components of SOD activity, vitamin C concentration and total phenol content were highly correlated with ABTS⋅+-SA. Obviously, polyphenols in the fermented kiwifruit extract evolved into monophenols during fermentation. Compared to undigested samples, the activity of ABTS⋅+-SA and reducing power capacity (RP-CA) after the final intestinal digestion decreased and ranged 387.44-531.89 VCμg/mL, 650.95-981.63 VCμg/mL, respectively (P < 0.05). Meanwhile, SOD activity on the 10th day of fermentation were still remained 222.82 U/mL, 206.98 U/mL and 217.23 U/mL, respectively. These results suggested that the fermented kiwifruit extract could exhibit antioxidant activity through tolerance to the digestive environment.
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Affiliation(s)
- Yanhua Li
- College of Food Science and Biotechnology, Zhejiang Gongshang University, Key Laboratory for Food Microbial Technology of Zhejiang Province, 310018 Hangzhou, Zhejiang, China.
| | - Weijun Wang
- Department of Biology and Environment, Jiyang College of Zhejiang A&F University, 311800 Zhuji, Zhejiang, China
| | - Yangyong Deng
- Hangzhou Yaoshengji Food Co., Ltd, 310000 Hangzhou, Zhejiang, China
| | - Junlong Gao
- Hangzhou Yaoshengji Food Co., Ltd, 310000 Hangzhou, Zhejiang, China
| | - Jiayun Shi
- College of Food Science and Biotechnology, Zhejiang Gongshang University, Key Laboratory for Food Microbial Technology of Zhejiang Province, 310018 Hangzhou, Zhejiang, China
| | - Liqin Cai
- College of Food Science and Biotechnology, Zhejiang Gongshang University, Key Laboratory for Food Microbial Technology of Zhejiang Province, 310018 Hangzhou, Zhejiang, China
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2
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Moghadam Fard A, Goodarzi P, Mottahedi M, Garousi S, Zadabhari H, Kalantari Shahijan M, Esmaeili S, Nabi-Afjadi M, Yousefi B. Therapeutic applications of melatonin in disorders related to the gastrointestinal tract and control of appetite. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-02972-5. [PMID: 38358468 DOI: 10.1007/s00210-024-02972-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/19/2024] [Indexed: 02/16/2024]
Abstract
Most animals have large amounts of the special substance melatonin, which is controlled by the light/dark cycle in the suprachiasmatic nucleus. According to what is now understood, the gastrointestinal tract (GIT) and other areas of the body are sites of melatonin production. According to recent studies, the GIT and adjacent organs depend critically on a massive amount of melatonin. Not unexpectedly, melatonin's many biological properties, such as its antioxidant, anti-inflammatory, pro-apoptotic, anti-proliferative, anti-metastasis, and antiangiogenic properties, have drawn the attention of researchers more and more. Because melatonin is an antioxidant, it produces a lot of secretions in the GIT's mucus and saliva, which shields cells from damage and promotes the development of certain GIT-related disorders. Melatonin's ability to alter cellular behavior in the GIT and other associated organs, such as the liver and pancreas, is another way that it functions. This behavior alters the secretory and metabolic activities of these cells. In this review, we attempted to shed fresh light on the many roles that melatonin plays in the various regions of the gastrointestinal tract by focusing on its activities for the first time.
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Affiliation(s)
| | - Pardis Goodarzi
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mehran Mottahedi
- Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Setareh Garousi
- Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamed Zadabhari
- Physiotherapy and Rehabilitation Faculty, Medipol University Health of Science, Istanbul, Turkey
| | | | - Saeedeh Esmaeili
- Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohsen Nabi-Afjadi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Bahman Yousefi
- Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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3
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Lei X, Xu Z, Huang L, Huang Y, Tu S, Xu L, Liu D. The potential influence of melatonin on mitochondrial quality control: a review. Front Pharmacol 2024; 14:1332567. [PMID: 38273825 PMCID: PMC10808166 DOI: 10.3389/fphar.2023.1332567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 12/31/2023] [Indexed: 01/27/2024] Open
Abstract
Mitochondria are critical for cellular energetic metabolism, intracellular signaling orchestration and programmed death regulation. Therefore, mitochondrial dysfunction is associated with various pathogeneses. The maintenance of mitochondrial homeostasis and functional recovery after injury are coordinated by mitochondrial biogenesis, dynamics and autophagy, which are collectively referred to as mitochondrial quality control. There is increasing evidence that mitochondria are important targets for melatonin to exert protective effects under pathological conditions. Melatonin, an evolutionarily conserved tryptophan metabolite, can be synthesized, transported and metabolized in mitochondria. In this review, we summarize the important role of melatonin in the damaged mitochondria elimination and mitochondrial energy supply recovery by regulating mitochondrial quality control, which may provide new strategies for clinical treatment of mitochondria-related diseases.
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Affiliation(s)
- Xudan Lei
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Experimental Research, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Center, Sichuan Cancer Hospital and Institute, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Zhenni Xu
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Experimental Research, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Center, Sichuan Cancer Hospital and Institute, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Lingxiao Huang
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Experimental Research, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Center, Sichuan Cancer Hospital and Institute, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Yujun Huang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Siyu Tu
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lu Xu
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Experimental Research, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Center, Sichuan Cancer Hospital and Institute, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Dengqun Liu
- Radiation Oncology Key Laboratory of Sichuan Province, Department of Experimental Research, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Center, Sichuan Cancer Hospital and Institute, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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4
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Qiu W, Ye J, Su Y, Zhang X, Pang X, Liao J, Wang R, Zhao C, Zhang H, Hu L, Tang Z, Su R. Co-exposure to environmentally relevant concentrations of cadmium and polystyrene nanoplastics induced oxidative stress, ferroptosis and excessive mitophagy in mice kidney. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:121947. [PMID: 37270049 DOI: 10.1016/j.envpol.2023.121947] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/15/2023] [Accepted: 05/31/2023] [Indexed: 06/05/2023]
Abstract
Nanoplastics (NPs) are defined as a group of emerging pollutants. However, the adverse effect of NPs and/or heavy metals on mammals is still largely unclear. Therefore, we performed a 35-day chronic toxicity experiment with mice to observe the impacts of exposure to Cadmium (Cd) and/or polystyrene nanoplastics (PSNPs). This study revealed that combined exposure to Cd and PSNPs added to the mice's growth toxicity and kidney damage. Moreover, Cd and PSNPs co-exposure obviously increased the MDA level and expressions of 4-HNE and 8-OHDG while decreasing the activity of antioxidase in kidneys via inhibiting the Nrf2 pathway and its downstream genes and proteins expression. More importantly, the results suggested for the first time that Cd and PSNPs co-exposure synergistically increased iron concentration in kidneys, and induced ferroptosis through regulating expression levels of SLC7A11, GPX4, PTGS2, HMGB1, FTH1 and FTL. Simultaneously, Cd and PSNPs co-exposure further increased the expression levels of Pink, Parkin, ATG5, Beclin1, and LC3 while significantly reducing the P62 expression level. In brief, this study found that combined exposure to Cd and PSNPs synergistically caused oxidative stress, ferroptosis and excessive mitophagy ultimately aggravating kidney damage in mice, which provided new insight into the combined toxic effect between heavy metals and PSNPs on mammals.
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Affiliation(s)
- Wenyue Qiu
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Jiali Ye
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Yiman Su
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Xinting Zhang
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Xiaoyue Pang
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Jianzhao Liao
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Rongmei Wang
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China
| | - Cuiyan Zhao
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China
| | - Hui Zhang
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Lianmei Hu
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China
| | - Rongsheng Su
- College of Veterinary Medicine, South China of Agricultural University, Guangzhou, China.
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Burkhart JG, Wu G, Song X, Raimondi F, McWeeney S, Wong MH, Deng Y. Biology-inspired graph neural network encodes reactome and reveals biochemical reactions of disease. PATTERNS (NEW YORK, N.Y.) 2023; 4:100758. [PMID: 37521042 PMCID: PMC10382942 DOI: 10.1016/j.patter.2023.100758] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/20/2022] [Accepted: 05/01/2023] [Indexed: 08/01/2023]
Abstract
Functional heterogeneity of healthy human tissues complicates interpretation of molecular studies, impeding precision therapeutic target identification and treatment. Considering this, we generated a graph neural network with Reactome-based architecture and trained it using 9,115 samples from Genotype-Tissue Expression (GTEx). Our graph neural network (GNN) achieves adjusted Rand index (ARI) = 0.7909, while a Resnet18 control model achieves ARI = 0.7781, on 370 held-out healthy human tissue samples from The Cancer Genome Atlas (TCGA), despite the Resnet18 using over 600 times the parameters. Our GNN also succeeds in separating 83 healthy skin samples from 95 lesional psoriasis samples, revealing that upregulation of 26S- and NUB1-mediated degradation of NEDD8, UBD, and their conjugates is central to the largest perturbed reaction network component in psoriasis. We show that our results are not discoverable using traditional differential expression and hypergeometric pathway enrichment analyses yet are supported by separate human multi-omics and small-molecule mouse studies, suggesting future molecular disease studies may benefit from similar GNN analytical approaches.
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Affiliation(s)
- Joshua G. Burkhart
- Department of Quantitative Health Sciences, University of Hawaii John A. Burns School of Medicine, Honolulu, HI 96813, USA
| | - Guanming Wu
- Division of Bioinformatics and Computational Biology, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, OR 97239, USA
| | - Xubo Song
- Department of Computer Science and Electrical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
| | | | - Shannon McWeeney
- Division of Bioinformatics and Computational Biology, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, OR 97239, USA
| | - Melissa H. Wong
- Department of Cell, Developmental, and Cancer Biology, Oregon Health & Science University, Portland, OR 97201, USA
| | - Youping Deng
- Department of Quantitative Health Sciences, University of Hawaii John A. Burns School of Medicine, Honolulu, HI 96813, USA
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Bona S, Fernandes SA, Moreira ACJ, Rodrigues G, Schemitt EG, Di Naso FC, Marroni CA, Marroni NP. Melatonin restores zinc levels, activates the Keap1/Nrf2 pathway, and modulates endoplasmic reticular stress and HSP in rats with chronic hepatotoxicity. World J Gastrointest Pharmacol Ther 2022; 13:11-22. [PMID: 35433098 PMCID: PMC8968507 DOI: 10.4292/wjgpt.v13.i2.11] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/18/2021] [Accepted: 01/20/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Melatonin (MLT) is a potent antioxidant molecule that is shown to have a beneficial effect in various pathological situations, due to its action against free radicals.
AIM To evaluate the effect of MLT on carbon tetrachloride (CCl4) induced liver injury in rats in terms of oxidative stress, reticular stress, and cell damage.
METHODS Twenty male Wistar rats (230-250 g) were divided into four groups: Control rats, rats treated with MLT alone, rats treated with CCl4 alone, and rats treated with CCl4 plus MLT. CCl4 was administered as follows: Ten doses every 5 d, ten every 4 d, and seven every 3 d. MLT was administered intraperitoneally at a dose of 20 mg/kg from the 10th wk to the end of the experiment (16th wk).
RESULTS MLT was able to reduce the release of liver enzymes in the bloodstream and to decrease oxidative stress in CCl4 treated rats by decreasing the level of thiobarbituric acid reactive substances and increasing superoxide dismutase activity, with a lower reduction in serum zinc levels, guaranteeing a reduction in liver damage; additionally, it increased the expression of nuclear factor (erythroid-derived 2)-like 2 and decreased the expression of Kelch-like ECH-associated protein 1. MLT also decreased the expression of the proteins associated with endoplasmic reticulum stress, i.e., glucose-regulated protein 78 and activating transcription factor 6, as well as of heat shock factor 1 and heat shock protein 70.
CONCLUSION MLT has a hepatoprotective effect in an experimental model of CCl4-induced liver injury, since it reduces oxidative stress, restores zinc levels, and modulates endoplasmic reticulum stress.
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Affiliation(s)
- Silvia Bona
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, Rio Grande do Sul, Brazil
| | - Sabrina Alves Fernandes
- Posgraduate Program in Hepatology, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90040-001, Rio Grande do Sul, Brazil
| | - Andrea C Janz Moreira
- Biological Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Rio Grande do Sul, Brazil
| | - Graziella Rodrigues
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, Rio Grande do Sul, Brazil
| | - Elizângela G Schemitt
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, Rio Grande do Sul, Brazil
| | - Fabio Cangeri Di Naso
- Postgraduate Program in Pneumological Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre 90000-000, Rio Grande do Sul, Brazil
| | - Cláudio A Marroni
- Posgraduate Program in Hepatology, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90040-001, Rio Grande do Sul, Brazil
| | - Norma P Marroni
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, Rio Grande do Sul, Brazil
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Melatonin Improves Levels of Zn and Cu in the Muscle of Diabetic Obese Rats. Pharmaceutics 2021; 13:pharmaceutics13101535. [PMID: 34683825 PMCID: PMC8539996 DOI: 10.3390/pharmaceutics13101535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 11/16/2022] Open
Abstract
Melatonin improves metabolic alterations associated with obesity and its diabetes (diabesity). We intend to determine whether this improvement is exerted by changing Zn and/or Cu tissue levels in liver, muscle, pancreas, and brain, and in internal (perirenal, perigonadal, and omentum) and subcutaneous lumbar white adipose tissues (IWAT and SWAT, respectively). Male Zücker diabetic fatty (ZDF) rats and lean littermates (ZL) were orally supplemented either with melatonin (10 mg/kg body weight/day) or vehicle for 6 weeks. Zn and Cu concentrations were not significantly influenced by diabesity in the analyzed tissues (p > 0.05), with the exception of Zn in liver. In skeletal muscle Zn and Cu, and in perirenal WAT, only Zn levels increased significantly with melatonin supplementation in ZDF rats (p < 0.05). This cytoplasmic Zn enhancement would be probably associated with the upregulation of several Zn influx membrane transporters (Zips) and could explain the amelioration in the glycaemia and insulinaemia by upregulating the Akt and downregulating the inhibitor PTP1B, in obese and diabetic conditions. Enhanced Zn and Cu levels in muscle cells could be related to the reported antioxidant melatonin activity exerted by increasing the Zn, Cu-SOD, and extracellular Cu-SOD activity. In conclusion, melatonin, by increasing the muscle levels of Zn and Cu, joined with our previously reported findings improves glycaemia, insulinaemia, and oxidative stress in this diabesity animal model.
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Matos RS, Oriá RB, Bruin PFC, Pinto DV, Viana AFSC, Santos FA, Duarte ASG, Bruin VMS. Acute blockade of endogenous melatonin by Luzindole, with or without peripheral LPS injection, induces jejunal inflammation and morphological alterations in Swiss mice. ACTA ACUST UNITED AC 2021; 54:e11215. [PMID: 34431873 PMCID: PMC8389610 DOI: 10.1590/1414-431x2021e11215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/22/2021] [Indexed: 11/21/2022]
Abstract
This study investigated the acute blockade of endogenous melatonin (MLT) using Luzindole with or without systemic lipopolysaccharide (LPS) challenge and evaluated changes in inflammatory and oxidative stress markers in the mouse jejunum. Luzindole is an MT1/MT2 MLT receptor antagonist. Both receptors occur in the small intestine. Swiss mice were treated with either saline (0.35 mg/kg, ip), Luzindole (0.35 mg/kg, ip), LPS (1.25 mg/kg, ip), or Luzindole+LPS (0.35 and 1.25 mg/kg, ip, respectively). Jejunum samples were evaluated regarding intestinal morphometry, histopathological crypt scoring, and PAS-positive villus goblet cell counting. Inflammatory Iba-1, interleukin (IL)-1β, tumor necrosis factor (TNF)-α, nuclear factor (NF)-kB, myeloperoxidase (MPO), and oxidative stress (NP-SHs, catalase, MDA, nitrate/nitrite) markers were assessed. Mice treated with Luzindole, LPS, and Luzindole+LPS showed villus height shortening. Crypt damage was worse in the LPS group. Luzindole, LPS, and Luzindole+LPS reduced the PAS-goblet cell labeling and increased Iba-1-immunolabelled cells compared to the saline group. Immunoblotting for IL-1β, TNF-α, and NF-kB was greater in the Luzindole group. The LPS-challenged group showed higher MPO activity than the saline and Luzindole groups. Catalase was reduced in the Luzindole and Luzindole+LPS groups compared to saline. The Luzindole group showed an increase in NP-SHs, an effect related to compensatory GSH activity. The acute blockade of endogenous MLT with Luzindole induced early changes in inflammatory markers with altered intestinal morphology. The other non-detectable deleterious effects of Luzindole may be balanced by the unopposed direct action of MLT in immune cells bypassing the MT1/MT2 receptors.
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Affiliation(s)
- R S Matos
- Laboratório de Sono e Ritmos Biológicos, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - R B Oriá
- Laboratório da Biologia da Cicatrização, Ontogenia e Nutrição de Tecidos, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil.,Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - P F C Bruin
- Laboratório de Sono e Ritmos Biológicos, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - D V Pinto
- Laboratório da Biologia da Cicatrização, Ontogenia e Nutrição de Tecidos, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - A F S C Viana
- Laboratório de Produtos Naturais, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - F A Santos
- Laboratório de Produtos Naturais, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - A S G Duarte
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - V M S Bruin
- Laboratório de Sono e Ritmos Biológicos, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
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Tamarindo GH, Gobbo MG, Taboga SR, Almeida EA, Góes RM. Melatonin ameliorates degenerative alterations caused by age in the rat prostate and mitigates high-fat diet damages. Cell Biol Int 2020; 45:92-106. [PMID: 32991000 DOI: 10.1002/cbin.11472] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/03/2020] [Accepted: 09/26/2020] [Indexed: 12/16/2022]
Abstract
Imbalance of sexual steroids milieu and oxidative stress are often observed during aging and correlated to prostate disorders. Likewise, high-fat intake has been related to prostate damage and tumor development. Melatonin (MLT) is an antioxidant whose secretion decreases in elderly and is also suggested to protect the gland. This study evaluated the impact of a long-term high-fat diet during aging on prostate morphology and antioxidant system of rats and tested the effects of MLT supplementation under these conditions. Male rats were assigned into four groups: control, treated with MLT, high-fat diet and high-fat diet treated with MLT. The high-fat diet was provided from the 24th week of age, MLT from the 48th (100 μg/kg/day) and rats were euthanized at the 62nd week. The high-fat diet increased body weight, retroperitoneal fatness, glycaemia, and circulating estrogen levels. It aggravated the aging effects, leading to epithelial atrophy (∼32% reduction of epithelial height) and collagen fibers increase (83%). MLT alone did not alter biometric and physiological parameters, except for the prostate weight decrease, whereas it alleviated biometric as well as ameliorated acinar atrophy induced by high-lipid intake. Systemic oxidative stress increased, and prostatic glutathione peroxidase activity decreased fivefold with the high-fat diet despite the indole. Regardless of the diet, MLT triggered epithelial desquamation, reduced androgen receptor-positive cells, increased smooth muscle layer thickness (12%), decreased at least 50% corpora amylacea formation, and stimulated prostatic gluthatione-S-transferase activity. In conclusion, MLT partially recovered prostate damage induced by aging and the long-term high-fat diet and ameliorated degenerative prostate alterations.
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Affiliation(s)
- Guilherme H Tamarindo
- Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.,Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
| | - Marina G Gobbo
- Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.,Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
| | - Sebastião R Taboga
- Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.,Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
| | - Eduardo A Almeida
- Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil.,Department of Natural Sciences, Regional University of Blumenau, Blumenau, Santa Catarina, Brazil
| | - Rejane M Góes
- Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.,Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
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Proshkina E, Shaposhnikov M, Moskalev A. Genome-Protecting Compounds as Potential Geroprotectors. Int J Mol Sci 2020; 21:E4484. [PMID: 32599754 PMCID: PMC7350017 DOI: 10.3390/ijms21124484] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 02/06/2023] Open
Abstract
Throughout life, organisms are exposed to various exogenous and endogenous factors that cause DNA damages and somatic mutations provoking genomic instability. At a young age, compensatory mechanisms of genome protection are activated to prevent phenotypic and functional changes. However, the increasing stress and age-related deterioration in the functioning of these mechanisms result in damage accumulation, overcoming the functional threshold. This leads to aging and the development of age-related diseases. There are several ways to counteract these changes: 1) prevention of DNA damage through stimulation of antioxidant and detoxification systems, as well as transition metal chelation; 2) regulation of DNA methylation, chromatin structure, non-coding RNA activity and prevention of nuclear architecture alterations; 3) improving DNA damage response and repair; 4) selective removal of damaged non-functional and senescent cells. In the article, we have reviewed data about the effects of various trace elements, vitamins, polyphenols, terpenes, and other phytochemicals, as well as a number of synthetic pharmacological substances in these ways. Most of the compounds demonstrate the geroprotective potential and increase the lifespan in model organisms. However, their genome-protecting effects are non-selective and often are conditioned by hormesis. Consequently, the development of selective drugs targeting genome protection is an advanced direction.
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Affiliation(s)
- Ekaterina Proshkina
- Laboratory of Geroprotective and Radioprotective Technologies, Institute of Biology, Komi Science Centre, Ural Branch, Russian Academy of Sciences, 28 Kommunisticheskaya st., 167982 Syktyvkar, Russia; (E.P.); (M.S.)
| | - Mikhail Shaposhnikov
- Laboratory of Geroprotective and Radioprotective Technologies, Institute of Biology, Komi Science Centre, Ural Branch, Russian Academy of Sciences, 28 Kommunisticheskaya st., 167982 Syktyvkar, Russia; (E.P.); (M.S.)
| | - Alexey Moskalev
- Laboratory of Geroprotective and Radioprotective Technologies, Institute of Biology, Komi Science Centre, Ural Branch, Russian Academy of Sciences, 28 Kommunisticheskaya st., 167982 Syktyvkar, Russia; (E.P.); (M.S.)
- Pitirim Sorokin Syktyvkar State University, 55 Oktyabrsky prosp., 167001 Syktyvkar, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
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T. cruzi infection among aged rats: Melatonin as a promising therapeutic molecule. Exp Gerontol 2020; 135:110922. [PMID: 32151734 DOI: 10.1016/j.exger.2020.110922] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/12/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022]
Abstract
Although T. cruzi was identified as the cause of Chagas disease more than 100 years ago, satisfactory treatments still do not exist, especially for chronic disease. Here we review work suggesting that melatonin could have promise as a Chagas therapeutic. Melatonin has remarkably diverse actions. It is an immunomodulator, an anti-inflammatory, an antioxidant, a free radical scavenger, and has antiapoptotic and anti-aging effects. The elderly (aged 60 years or more) as a group are growing faster than any other age group. Here we discuss the major effects and the mechanisms of action of melatonin on aged T. cruzi-infected rats. Melatonin's protective effects may be consequences of its cooperative antioxidant and immunomodulatory actions. Melatonin modulates oxidative damage, inducing an antioxidant response and reversing age-related thymus regression. Its protective actions could be the result of its anti-apoptotic activity, and by its counteracting the excessive production of corticosterone. This review describes our work showing that host age plays an important and variable influence on the progression of systemic T. cruzi infection and supporting the hypothesis that melatonin should be considered as a powerful therapeutic compound with multiple activities that can improve host homeostasis during experimental T. cruzi infection.
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12
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Wang Y, Zhang L, Chen L. Glutathione Peroxidase-Activatable Two-Photon Ratiometric Fluorescent Probe for Redox Mechanism Research in Aging and Mercury Exposure Mice Models. Anal Chem 2019; 92:1997-2004. [PMID: 31858778 DOI: 10.1021/acs.analchem.9b04381] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Solid evidence confirms that glutathione peroxidase (GPx) is a kind of vital protease in the first-line antioxidant defense system and participates in regulation of redox homeostasis as well as the pentose phosphate pathway. However, the current methods cannot achieve real-time and in situ visualization studies of GPx. In addition, GPx is highly reactive and susceptible to external interference, and there is rare research for exploring the roles of GPx under environmental factor exposure. Herein, we report a novel two-photon ratiometric fluorescent probe (TP-SS) for GPx detection for the first time. Using TP-SS, we explore the reversible catalytic cycle and the antioxidant mechanisms of GPx/GSH redox pool in aging and mercury exposure models. We detect the concentration fluctuation of GPx in aging and mercury exposure mice models. Also, we perform GPx detection in deep brain tissue and the imaging depth up to 100 μm. We believe that the novel two-photon ratiometric fluorescent probe TP-SS can facilitate the development of GPx-targeting tools and offer great advances in exploring the physiological/pathological functions of GPx.
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Affiliation(s)
- Yue Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology , Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai 264003 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Liangwei Zhang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology , Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai 264003 , China.,Center for Ocean Mega-Science , Chinese Academy of Sciences , Qingdao 266071 , China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology , Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai 264003 , China.,School of Pharmacy , Binzhou Medical University , Yantai 264003 , China.,Center for Ocean Mega-Science , Chinese Academy of Sciences , Qingdao 266071 , China.,Department of Chemistry and Chemical Engineering , Qufu Normal University , Qufu 273165 , China
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Han B, Li S, Lv Y, Yang D, Li J, Yang Q, Wu P, Lv Z, Zhang Z. Dietary melatonin attenuates chromium-induced lung injury via activating the Sirt1/Pgc-1α/Nrf2 pathway. Food Funct 2019; 10:5555-5565. [PMID: 31429458 DOI: 10.1039/c9fo01152h] [Citation(s) in RCA: 147] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Exposure to chromium (Cr) causes a number of respiratory diseases, including lung cancer and pulmonary fibrosis. However, there is currently no safe treatment for Cr-induced lung damage. Here, we used in vivo and in vitro approaches to examine the protective effects of melatonin (MEL) on Cr-induced lung injury and to identify the underlying molecular mechanisms. We found that treatment of rats or a mouse lung epithelial cell MLE-12 with MEL attenuated K2Cr2O7-induced lung injury by reducing the production of oxidative stress and inflammatory mediators and inhibiting cell apoptosis. MEL treatment upregulated the expression of silent information regulator 1 (Sirt1), which deacetylated the transcriptional coactivator peroxisome proliferator-activated receptor-γ coactivator-1α (Pgc-1α). In turn, this increased the expression of the transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2) and key anti-oxidant target genes. These results suggest that melatonin attenuates chromium-induced lung injury via activating the Sirt1/Pgc-1α/Nrf2 pathway. Dietary MEL supplement may be a potential new strategy for the treatment of Cr poisoning.
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Affiliation(s)
- Bing Han
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Siyu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Yueying Lv
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Daqian Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Jiayi Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Qingyue Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Pengfei Wu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Zhanjun Lv
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China. and Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin, 150030, China
| | - Zhigang Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China. and Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin, 150030, China
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Tinto M, Sartori M, Pizzi I, Verga A, Longoni S. Melatonin as host modulating agent supporting nonsurgical periodontal therapy in patients affected by untreated severe periodontitis: A preliminary randomized, triple‐blind, placebo‐controlled study. J Periodontal Res 2019; 55:61-67. [DOI: 10.1111/jre.12686] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/11/2019] [Accepted: 07/06/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Manuel Tinto
- Unit of Periodontology Santa Apollonia Dental Center Lazzate MB Italy
| | - Matteo Sartori
- Unit of Periodontology Santa Apollonia Dental Center Lazzate MB Italy
| | - Ileana Pizzi
- Unit of Periodontology Santa Apollonia Dental Center Lazzate MB Italy
| | - Alessandra Verga
- Unit of Periodontology Santa Apollonia Dental Center Lazzate MB Italy
| | - Salvatore Longoni
- Unit of Periodontology Santa Apollonia Dental Center Lazzate MB Italy
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15
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Schemitt EG, Hartmann RM, Colares JR, Licks F, Salvi JO, Marroni CA, Marroni NP. Protective action of glutamine in rats with severe acute liver failure. World J Hepatol 2019; 11:273-286. [PMID: 30967905 PMCID: PMC6447424 DOI: 10.4254/wjh.v11.i3.273] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 01/29/2019] [Accepted: 03/12/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Severe acute liver failure (SALF) is a rare, but high-mortality, rapidly evolving syndrome that leads to hepatocyte degeneration with impaired liver function. Thioacetamide (TAA) is a known xenobiotic, which promotes the increase of the formation of reactive oxygen species. Erythroid 2-related factor 2 (Nrf2) activates the antioxidant protection of cells. Studies have evidenced the involvement of inflammatory mediators in conditions of oxidative stress. AIM To evaluate the antioxidant effects of glutamine on Nrf2 activation and NFκB-mediated inflammation in rats with TAA-induced IHAG. METHODS Male Wistar rats (n = 28) were divided into four groups: control, control+glutamine, TAA, and TAA + glutamine. Two TAA doses (400 mg/kg) were administered intraperitoneally, 8 h apart. Glutamine (25 mg/kg) was administered at 30 min, 24 h, and 36 h. At 48 h, blood was collected for liver integrity analysis [aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP)]. The liver was harvested for histology and assessment of oxidative stress [thiobarbituric acid-reactive substances (TBARS), catalase (CAT), glutathione peroxidase (GPx), glutathione S-transferase (GST), glutathione (GSH), Nrf2, Kelch-like ECH-associated protein 1 (Keap1), NADPH quinone oxidoreductase1 (NQO1), superoxide dismutase (SOD)] and inflammatory process. RESULTS TAA caused disruption of the hepatic parenchyma, with inflammatory infiltration, massive necrosis, and ballooning degeneration. Glutamine mitigated this tissue damage, with visible regeneration of hepatic parenchyma; decreased TBARS (P < 0.001), GSH (P < 0.01), IL-1β, IL6, and TNFα levels (P <0.01) in hepatic tissue; and decreased blood levels of AST, ALT, and ALP (P <0.05). In addition, CAT, GPx, and GST activities were restored in the glutamine group (P <0.01, P <0.01, and P <0.001, respectively vs TAA alone). Glutamine increased expression of Nrf2 (P < 0.05), NQO1, and SOD (P < 0.01), as well as levels of IL-10 (P <0.001), while decreasing expression of Keap1, TLR4, NFκB (P < 0.001), COX-2 and iNOS, (P < 0.01), and reducing NO2 and NO3 levels (P < 0.05). CONCLUSION In the TAA experimental model of IHAG, glutamine activated the Nrf2 pathway, thus promoting antioxidant protection, and blunted the NFκB-mediated pathway, reducing inflammation.
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Affiliation(s)
- Elizângela G Schemitt
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
| | - Renata M Hartmann
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
| | - Josieli R Colares
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
| | - Francielli Licks
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
| | - Jéferson O Salvi
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
| | - Cláudio A Marroni
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil.
| | - Norma P Marroni
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre, Porto Alegre 90040060, Brazil
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Majidinia M, Reiter RJ, Shakouri SK, Yousefi B. The role of melatonin, a multitasking molecule, in retarding the processes of ageing. Ageing Res Rev 2018; 47:198-213. [PMID: 30092361 DOI: 10.1016/j.arr.2018.07.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 07/24/2018] [Accepted: 07/31/2018] [Indexed: 02/07/2023]
Abstract
Biological ageing is generally accompanied by a gradual loss of cellular functions and physiological integrity of organ systems, the consequential enhancement of vulnerability, senescence and finally death. Mechanisms which underlie ageing are primarily attributed to an array of diverse but related factors including free radical-induced damage, dysfunction of mitochondria, disruption of circadian rhythms, inflammaging, genomic instability, telomere attrition, loss of proteostasis, deregulated sensing of nutrients, epigenetic alterations, altered intercellular communication, and decreased capacity for tissue repair. Melatonin, a prime regulator of human chronobiological and endocrine physiology, is highly reputed as an antioxidant, immunomodulatory, antiproliferative, oncostatic, and endocrine-modulatory molecule. Interestingly, several recent reports support melatonin as an anti-ageing agent whose multifaceted functions may lessen the consequences of ageing. This review depicts four categories of melatonin's protective effects on ageing-induced molecular and structural alterations. We also summarize recent findings related to the function of melatonin during ageing in various tissues and organs.
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Hasan KN, Pal PK, Maitra SK. Temporal relationship between the levels of melatonin and different antioxidants in the liver of a surface feeding carp Catla catla. BIOL RHYTHM RES 2018. [DOI: 10.1080/09291016.2018.1533728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Kazi Nurul Hasan
- Department of Zoology, Sidho-Kanho-Birsha University, Purulia, India
| | - Palash Kumar Pal
- Department of Physiology, University of Calcutta, Kolkata, India
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Abstract
OBJECTIVES The objective of this study is to explore the effect of melatonin on endoplasmic reticulum stress in acute pancreatitis (AP) and the molecular mechanism. METHODS Acute pancreatitis was induced in vivo in Sprague-Dawley rats by the retrograde injection of 5% taurocholate into the biliopancreatic duct and in vitro by treating AR42J cells with cerulein (10 nmol/L) plus lipopolysaccharide (LPS) (10 mg/L). The rats and cells were treated with melatonin (50 mg/kg in rats and 0.5, 1, and 2 mmol/L in AR42J cells) 30 minutes before AP was induced. After 9 hours, the cells and rat pancreas tissue were collected for Western blot, reverse transcription polymerase chain reaction, histological examination, immunohistochemistry, and immunofluorescence analysis. RESULTS Inositol-requiring 1α (IRE1α)-mediated Jun N-terminal kinase (JNK)/nuclear factor-kappa B (NF-κB) pathway were activated early in AR42J cells and rat AP models. Melatonin significantly inhibited the expression of proinflammatory cytokines. Western blot and immunohistochemical results all indicated that melatonin regulated apoptosis-related protein expression. In addition, melatonin treatment resulted in significantly reduced pancreatic tissue injury, as revealed by histological changes and pathological scores. Furthermore, melatonin treatment significantly reduced the activation of IRE1α-mediated JNK/NF-κB pathway-related proteins. CONCLUSIONS These findings suggest that melatonin protects AR42J cells and Sprague-Dawley rats against AP-associated injury, probably through downregulation of IRE1α-mediated JNK/NF-κB pathways.
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19
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Bona S, Rodrigues G, Moreira AJ, Di Naso FC, Dias AS, Da Silveira TR, Marroni CA, Marroni NP. Antifibrogenic effect of melatonin in rats with experimental liver cirrhosis induced by carbon tetrachloride. JGH OPEN 2018; 2:117-123. [PMID: 30483575 PMCID: PMC6206983 DOI: 10.1002/jgh3.12055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/26/2018] [Accepted: 04/02/2018] [Indexed: 12/18/2022]
Abstract
Background and Aim Liver diseases are a major public health problem, accounting for a significant number of hospital visits and admissions and an increasing mortality rate. Melatonin (MLT) is a powerful antioxidant molecule that has been shown to be beneficial under various conditions. The objective was to evaluate the effect of MLT on experimental liver cirrhosis induced by carbon tetrachloride (CCl4) in rats. Methods Twenty male Wistar rats (230–250 g) were divided into four groups. I: control group (CO); II: CO + MLT; III: CCl4; and IV: CCl4 + MLT. CCl4 was administered intraperitoneally (i.p.) as follows: 10 doses every 5 days, 10 doses every 4 days, and 7 doses every 3 days. MLT was administered i.p. at a dose of 20 mg/kg from the 10th week to the end of the experiment (16th week). Results In the CCl4 + MLT group, we found that MLT caused a decrease in the level of F2‐isoprostanes and NQO1 expression. We also found that MLT reduced the inflammatory process as shown by decreased expressions of NF‐KB/p65 and inducible nitric oxide synthase (iNOS) and a smaller amount of inflammatory infiltrate. MLT reduced the expression of transforming growth factor beta1 (TGF‐β1), alpha‐smooth muscle actin (α‐SMA), and vascular endothelial growth factor (VEGF). Picrosirius staining showed that MLT decreases fibrosis. Conclusion MLT has a potent antifibrogenic effect, modulating the parameters of oxidative stress, angiogenesis, and inflammation.
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Affiliation(s)
- Silvia Bona
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Medical Sciences: Medicine Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Graziella Rodrigues
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Medical Sciences: Medicine Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Andrea J Moreira
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Biological Sciences: Physiology Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Fábio C Di Naso
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Pneumological Sciences Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Alexandre S Dias
- Postgraduate Program in Pneumological Sciences Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Thêmis R Da Silveira
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil
| | - Claudio A Marroni
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Liver Diseases Universidade Federal de Ciências da Saúde de Porto Alegre Porto Alegre RS Brazil
| | - Norma P Marroni
- Center of Experimental Research Hospital de Clínicas de Porto Alegre Porto Alegre RS Brazil.,Postgraduate Program in Medical Sciences: Medicine Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil.,Postgraduate Program in Biological Sciences: Physiology Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil.,Postgraduate Program in Cell and Molecular Biology Applied to Health Universidade Luterana do Brasil Canoas RS Brazil
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Crooke A, Huete-Toral F, Colligris B, Pintor J. The role and therapeutic potential of melatonin in age-related ocular diseases. J Pineal Res 2017; 63. [PMID: 28658514 DOI: 10.1111/jpi.12430] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 06/23/2017] [Indexed: 12/20/2022]
Abstract
The eye is continuously exposed to solar UV radiation and pollutants, making it prone to oxidative attacks. In fact, oxidative damage is a major cause of age-related ocular diseases including cataract, glaucoma, age-related macular degeneration, and diabetic retinopathy. As the nature of lens cells, trabecular meshwork cells, retinal ganglion cells, retinal pigment epithelial cells, and photoreceptors is postmitotic, autophagy plays a critical role in their cellular homeostasis. In age-related ocular diseases, this process is impaired, and thus, oxidative damage becomes irreversible. Other conditions such as low-grade chronic inflammation and angiogenesis also contribute to the development of retinal diseases (glaucoma, age-related macular degeneration and diabetic retinopathy). As melatonin is known to have remarkable qualities such as antioxidant/antinitridergic, mitochondrial protector, autophagy modulator, anti-inflammatory, and anti-angiogenic, it can represent a powerful tool to counteract all these diseases. The present review analyzes the role and therapeutic potential of melatonin in age-related ocular diseases, focusing on nitro-oxidative stress, autophagy, inflammation, and angiogenesis mechanisms.
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Affiliation(s)
- Almudena Crooke
- Department of Biochemistry and Molecular Biology IV, Group Ocupharm, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Fernando Huete-Toral
- Department of Biochemistry and Molecular Biology IV, Group Ocupharm, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Basilio Colligris
- Department of Biochemistry and Molecular Biology IV, Group Ocupharm, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Jesús Pintor
- Department of Biochemistry and Molecular Biology IV, Group Ocupharm, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
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Vázquez J, González B, Sempere V, Mas A, Torija MJ, Beltran G. Melatonin Reduces Oxidative Stress Damage Induced by Hydrogen Peroxide in Saccharomyces cerevisiae. Front Microbiol 2017; 8:1066. [PMID: 28663741 PMCID: PMC5471302 DOI: 10.3389/fmicb.2017.01066] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/29/2017] [Indexed: 12/15/2022] Open
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), which is synthesized from tryptophan, is formed during alcoholic fermentation, though its role in yeast is unknown. This study employed Saccharomyces cerevisiae as an eukaryote model to evaluate the possible effects of melatonin supplementation on endogenous cellular defense systems by measuring its effects on various cellular targets. Cell viability, intracellular reduced and oxidized glutathione levels (GSH and GSSG, respectively), reactive oxygen species (ROS) production, and expression of genes related to antioxidant defense in yeast, such as the glutathione system, catalase, superoxide dismutase, glutaredoxin, and thioredoxin, were assessed. Melatonin alone decreased GSH, increased GSSG, and activated antioxidant defense system genes, which reached maximum levels in the stationary phase. These results indicate that melatonin supplementation enables cells to resist better the stress generated in the stationary phase. However, when cells were subjected to oxidative stress induced by H2O2, melatonin was able to partially mitigate cell damage by decreasing ROS accumulation and GSH and increasing GSSG; this was followed by enhanced cell viability after stress exposure, mostly when occurring in the early stationary phase. Additionally, under such conditions, most genes related to endogenous antioxidant defense continued to be up-regulated with melatonin supplementation. The findings demonstrate that melatonin can act as antioxidant in S. cerevisiae.
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Affiliation(s)
- Jennifer Vázquez
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Beatriz González
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Verónica Sempere
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Albert Mas
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - María Jesús Torija
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Gemma Beltran
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
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22
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Yang W, Burkhardt B, Fischer L, Beirow M, Bork N, Wönne EC, Wagner C, Husen B, Zeilinger K, Liu L, Nussler AK. Age-dependent changes of the antioxidant system in rat livers are accompanied by altered MAPK activation and a decline in motor signaling. EXCLI JOURNAL 2015; 14:1273-90. [PMID: 27004051 PMCID: PMC4800781 DOI: 10.17179/excli2015-734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 12/10/2015] [Indexed: 12/15/2022]
Abstract
Aging is characterized by a progressive decrease of cellular functions, because cells gradually lose their capacity to respond to injury. Increased oxidative stress is considered to be one of the major contributors to age-related changes in all organs including the liver. Our study has focused on elucidating whether important antioxidative enzymes, the mTOR pathway, and MAPKs exhibit age-dependent changes in the liver of rats during aging. We found an age-dependent increase of GSH in the cytosol and mitochondria. The aged liver showed an increased SOD enzyme activity, while the CAT enzyme activity decreased. HO-1 and NOS-2 gene expression was lower in adult rats, but up-regulated in aged rats. Western blot analysis revealed that SOD1, SOD2, GPx, GR, γ-GCL, and GSS were age-dependent up-regulated, while CAT remained constant. We also demonstrated that the phosphorylation of Akt, JNK, p38, and TSC2(Ser1254) decreased while ERK1/2 and TSC2(Thr1462) increased age-dependently. Furthermore, our data show that the mTOR pathway seems to be activated in livers of aged rats, and hence stimulating cell proliferation/regeneration, as confirmed by an age-dependent increase of PCNA and p-eIF4E(Ser209) protein expression. Our data may help to explain the fact that liver cells only proliferate in cases of necessity, like injury and damage. In summary, we have demonstrated that, age-dependent changes of the antioxidant system and stress-related signaling pathways occur in the livers of rats, which may help to better understand organ aging.
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Affiliation(s)
- Wei Yang
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
- Department of Nutrition and Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, PR China
| | - Britta Burkhardt
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Luise Fischer
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Maja Beirow
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Nadja Bork
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Eva C. Wönne
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Campus-Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Cornelia Wagner
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Bettina Husen
- Pharmacelsus GmbH, Science Park 2, 66123 Saarbrücken, Germany
| | - Katrin Zeilinger
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Campus-Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Liegang Liu
- Department of Nutrition and Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, PR China
| | - Andreas K. Nussler
- Eberhard Karls University Tübingen, Dept. of Traumatology, Schnarrenbergstr. 95, 72076 Tübingen, Germany
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23
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Licks F, Hartmann RM, Marques C, Schemitt E, Colares JR, Soares MDC, Reys J, Fisher C, da Silva J, Marroni NP. N-acetylcysteine modulates angiogenesis and vasodilation in stomach such as DNA damage in blood of portal hypertensive rats. World J Gastroenterol 2015; 21:12351-12360. [PMID: 26604642 PMCID: PMC4649118 DOI: 10.3748/wjg.v21.i43.12351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/14/2015] [Accepted: 07/18/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the antioxidant effect of N-acetylcysteine (NAC) on the stomach of rats with portal hypertension.
METHODS: Twenty-four male Wistar rats weighing ± 250 g were divided into four experimental groups (n = 6 each): Sham-operated (SO), SO + NAC, partial portal vein ligation (PPVL), and PPVL + NAC. Treatment with NAC in a dose of 10 mg/kg (i.p.) diluted in 0.6 mL of saline solution was administered daily for 7 d starting 8 d after the surgery. Animals from the PPVL and SO group received saline solution (0.6 mL) for the same period of time as the PPVL + NAC and SO + NAC group. On the 15th day the animals were anesthetized and we evaluated portal pressure by cannulating mesenteric artery. After, we removed the stomach for further analysis. We performed immunohistochemical analysis for endothelial nitric oxide synthase (eNOS), vascular endothelial growth factor (VEGF), and nitrotirosine (NTT) proteins in stomach. We also evaluated eNOS and VEGF by Western blot analysis and assessed DNA damage in blood samples by the comet assay.
RESULTS: The portal hypertension group exhibited increases in portal pressure when compared to SO group (29.8 ± 1.8 vs 12.0 ± 0.3 mmHg) (P < 0.001). The same was observed when we compared the eNOS (56.8 ± 3.7 vs 13.46 ± 2.8 pixels) (P < 0.001), VEGF (34.9 ± 4.7 vs 17.46 ± 2.6 pixels) (P < 0.05), and NTT (39.01 ± 4.0 vs 12.77 ± 2.3 pixels) (P < 0.05) expression by immunohistochemistry of the PPVL animals with the SO group. The expression of eNOS (0.39 ± 0.03 vs 0.25 ± 0.03 a.μ) (P < 0.01) and VEGF (0.38 ± 0.04 vs 0.26 ± 0.04 a.μ) (P < 0.01) were also evaluated by Western blot analysis, and we observed an increase of both proteins on PPVL animals. We also evaluated the DNA damage by comet assay, and observed an increase on damage index and damage frequency on those animals. NAC decreased portal pressure values in PPVL + NAC animals (16.46 ± 2 vs 29.8 ± 1.8 mmHg) (P < 0.001) when compared to PPVL. The expression of eNOS (14.60 ± 4.1 vs 56.8 ± 3.7 pixels) (P < 0.001), VEGF (19.53 ± 3.2 vs 34.9 ± 4.7 pixels) (P < 0.05) and NTT (21.84 ± 0.7 vs 39.01 ± 4.0 pixels) (P < 0.05) evaluated by immunohistochemistry were also reduced in PPVL + NAC animals. Also, when evaluated by Western blot eNOS expression (0.32 ± 0.03 vs 0.39 ± 0.03 a.μ) (P < 0.05) and VEGF expression (0.31 ± 0.09 vs 0.38 ± 0.04 a.μ) (P < 0.01). Furthermore, NAC modulated DNA damage in PPVL + NAC animals.
CONCLUSION: In view of these results, we believe NAC is able to protect the stomach from the alterations induced by the PPVL procedure.
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Shajari S, Laliena A, Heegsma J, Tuñón MJ, Moshage H, Faber KN. Melatonin suppresses activation of hepatic stellate cells through RORα-mediated inhibition of 5-lipoxygenase. J Pineal Res 2015; 59:391-401. [PMID: 26308880 DOI: 10.1111/jpi.12271] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 08/21/2015] [Indexed: 12/31/2022]
Abstract
Liver fibrosis is scar tissue resulting from an uncontrolled wound-healing process in response to chronic liver injury. Liver damage generates an inflammatory reaction that activates hepatic stellate cells (HSC) that transdifferentiate from quiescent cells that control retinol metabolism to proliferative and migratory myofibroblasts that produce excessive amounts of extracellular matrix proteins, in particular collagen 1a1 (COL1A1). Although liver fibrosis is reversible, no effective drug therapy is available to prevent or reverse HSC activation. Melatonin has potent hepatoprotective properties in a variety of acute and chronic liver injury models and suppresses liver fibrosis. However, it remains unclear whether melatonin acts indirectly or directly on HSC to prevent liver fibrosis. Here, we studied the effect of melatonin on culture-activated rat HSC. Melatonin dose-dependently suppressed the expression of HSC activation markers Col1a1 and alpha-smooth muscle actin (αSMA, Acta2), as well as HSC proliferation and loss of lipid droplets. The nuclear melatonin sensor retinoic acid receptor-related orphan receptor-alpha (RORα/Nr1f1) was expressed in quiescent and activated HSC, while the membranous melatonin receptors (Mtrn1a and Mtrn1b) were not. The synthetic RORα agonist SR1078 more potently suppressed Col1a1 and αSma expression, HSC proliferation, and lipid droplet loss, while the RORα antagonist SR1001 blocked the antifibrotic features of melatonin. Melatonin and SR1078 inhibited the expression of Alox5, encoding 5-lipoxygenase (5-LO). The pharmacological 5-LO inhibitor AA861 reduced Acta2 and Col1a1 expression in activated HSC. We conclude that melatonin directly suppresses HSC activation via RORα-mediated inhibition of Alox5 expression, which provides novel drug targets to treat liver fibrosis.
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Affiliation(s)
- Shiva Shajari
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Almudena Laliena
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | - Janette Heegsma
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - María Jesús Tuñón
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), León, Spain
| | - Han Moshage
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Klaas Nico Faber
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Abstract
Melatonin (N-acetyl-5-methoxytryptamine, MLT) is a neuroendocrine hormone, which is primarily synthesized by the pineal gland in vertebrates. Melatonin is a remarkable molecule with diverse biological and physiological actions and is involved in the regulation of various important functions such as circadian rhythm, energy metabolism, the reproductive system, the cardiovascular system, and the neuropsychiatric system. It also plays a role in disease by having anti-neoplastic and anti-osteoarthritic effects among others. Recently, research has focused on the roles of melatonin in oxidative stress, lipid metabolism, and hepatic steatosis and its potential therapeutic roles.
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Affiliation(s)
- Hang Sun
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Fang-fang Huang
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Shen Qu
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China.
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Kim JH, Yoo BH, Won SJ, Choi BY, Lee BE, Kim IY, Kho A, Lee SH, Sohn M, Suh SW. Melatonin Reduces Hypoglycemia-Induced Neuronal Death in Rats. Neuroendocrinology 2015; 102:300-310. [PMID: 26065386 DOI: 10.1159/000434722] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 06/02/2015] [Indexed: 11/19/2022]
Abstract
Melatonin, N-aceyl-5-methoxytryptamine, is the main secretory product of the pineal gland and has neuroprotective effects on several brain injuries, including ischemic stroke. In the present study, we hypothesized that exogenous melatonin may decrease hypoglycemia-induced neuronal death through the prevention of superoxide generation. To test our hypothesis, hypoglycemia was induced by injecting human insulin (10 U/kg, i.p.) in rats. Melatonin injection was started immediately after hypoglycemia (10 mg/kg, i.p.). The first melatonin injection was performed at the end of a 30-min isoelectric EEG period. The second and third injections were administered at 1 and 3 h after the first injection. Reactive oxygen species generation, as detected by dihydroethidium staining, was significantly reduced by melatonin treatment. Neuronal injury was reduced by the treatment of melatonin in the hippocampal CA1 and dentate granule cells. Microglia activation was robust in the hippocampus after hypoglycemia, which was almost completely prevented by melatonin treatment. Hypoglycemia-induced cognitive impairment was also significantly prevented by melatonin treatment. The present study suggests that melatonin has therapeutic potential to prevent hypoglycemia-induced brain injury.
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Affiliation(s)
- Jin Hee Kim
- Department of Neurology, University of California, San Francisco, Calif., USA
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27
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Reddy MY, Jagota A. Melatonin has differential effects on age-induced stoichiometric changes in daily chronomics of serotonin metabolism in SCN of male Wistar rats. Biogerontology 2014; 16:285-302. [DOI: 10.1007/s10522-014-9545-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 11/27/2014] [Indexed: 11/28/2022]
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28
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Oxidative stress and cell damage in a model of precancerous lesions and advanced hepatocellular carcinoma in rats. Toxicol Rep 2014; 2:333-340. [PMID: 28962366 PMCID: PMC5598147 DOI: 10.1016/j.toxrep.2014.11.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 11/21/2014] [Accepted: 11/21/2014] [Indexed: 12/20/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the third most frequent cause of cancer deaths throughout the world. This study was aimed to analyze oxidative stress and cell damage in a multistage model of liver carcinogenesis induced by diethylnitrosamine (DEN) in rats. Male Wistar rats weighing 145–150 g were divided into three groups: control, precancerous lesions (PL) (which received 100 mg DEN once a week every 6 weeks up to 28 weeks), and advanced HCC (50 mg DEN once/twice per week up to 19 weeks). Lipid peroxidation (TBARS), superoxide dismutase (SOD) activity, and expression of transforming growth factor-1 beta (TGF)-1β, endothelial and inducible nitric oxide syntahese (eNOS, iNOS), NADPH quinone oxireductase (NQO)-1, nuclear factor erythroid 2-related factor (NrF)2, kelch-like ECH-associated protein (Keap)1 and heat shock protein (HSP)70 were measured. TBARS concentration was augmented in the PL and advanced HCC groups. SOD activity, TGF-1β and Nrf2 expression were higher in animals with precancerous lesions. In advanced HCC, expression of NQO1 and iNOS increased while there was a decrease in HPS70 expression. Data obtained provide evidence for the differential activation of proteins involved in oxidative stress and cell damage during progression of carcinogenesis in an animal model of HCC.
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Key Words
- 2-AAF, 2-acetylaminofluorene
- ALT, alanine aminotransferase
- AP, alkaline phosphatase
- AST, aspartate aminotransferase
- DEN, diethylnitrosamine
- Diethylnitrosamine
- EDTA, ethylenediamine tetraacetic acid
- GGT, gamma-glutamyl transferase
- HCC, hepatocellular carcinoma
- HSC, hepatic stellate cells
- HSP70, heat shock 70-kDa protein
- Heat shock protein
- Hepatocarcinoma
- Keap1, kelch-like ECH-associated protein 1
- MDA, malonaldehyde
- NO, nitric oxide
- NQO1, NADPH quinone oxireductase-1
- Nitric oxide synthase
- Nrf2, nuclear factor erythroid 2-related factor 2
- Nuclear factor erythroid 2-related factor 2
- Oxidative stress
- PVDF, polyvinylidene fluoride
- SOD, superoxide dismutase
- TBARS, thiobarbituric acid reactant substances
- TGF-1β, transforming growth fator-1 beta
- TTBS, Tris-buffered containing 0.05% Tween 20
- UV, ultra violet
- eNOS, endothelial nitric oxide synthase
- iNOS, inducible nitric oxide synthase
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29
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Hasan KN, Moniruzzaman M, Maitra SK. Melatonin concentrations in relation to oxidative status and oocyte dynamics in the ovary during different reproductive phases of an annual cycle in carp Catla catla. Theriogenology 2014; 82:1173-85. [DOI: 10.1016/j.theriogenology.2014.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 08/03/2014] [Accepted: 08/05/2014] [Indexed: 12/19/2022]
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30
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Zhang HM, Zhang Y. Melatonin: a well-documented antioxidant with conditional pro-oxidant actions. J Pineal Res 2014; 57:131-46. [PMID: 25060102 DOI: 10.1111/jpi.12162] [Citation(s) in RCA: 576] [Impact Index Per Article: 57.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 07/18/2014] [Indexed: 12/19/2022]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), an indoleamine produced in many organs including the pineal gland, was initially characterized as a hormone primarily involved in circadian regulation of physiological and neuroendocrine function. Subsequent studies found that melatonin and its metabolic derivatives possess strong free radical scavenging properties. These metabolites are potent antioxidants against both ROS (reactive oxygen species) and RNS (reactive nitrogen species). The mechanisms by which melatonin and its metabolites protect against free radicals and oxidative stress include direct scavenging of radicals and radical products, induction of the expression of antioxidant enzymes, reduction of the activation of pro-oxidant enzymes, and maintenance of mitochondrial homeostasis. In both in vitro and in vivo studies, melatonin has been shown to reduce oxidative damage to lipids, proteins and DNA under a very wide set of conditions where toxic derivatives of oxygen are known to be produced. Although the vast majority of studies proved the antioxidant capacity of melatonin and its derivatives, a few studies using cultured cells found that melatonin promoted the generation of ROS at pharmacological concentrations (μm to mm range) in several tumor and nontumor cells; thus, melatonin functioned as a conditional pro-oxidant. Mechanistically, melatonin may stimulate ROS production through its interaction with calmodulin. Also, melatonin may interact with mitochondrial complex III or mitochondrial transition pore to promote ROS production. Whether melatonin functions as a pro-oxidant under in vivo conditions is not well documented; thus, whether the reported in vitro pro-oxidant actions come into play in live organisms remains to be established.
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Affiliation(s)
- Hong-Mei Zhang
- Department of Clinical Oncology, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
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31
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Hu ZP, Fang XL, Fang N, Wang XB, Qian HY, Cao Z, Cheng Y, Wang BN, Wang Y. Melatonin ameliorates vascular endothelial dysfunction, inflammation, and atherosclerosis by suppressing the TLR4/NF-κB system in high-fat-fed rabbits. J Pineal Res 2013; 55:388-98. [PMID: 24006943 DOI: 10.1111/jpi.12085] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 08/05/2013] [Indexed: 01/28/2023]
Abstract
Vascular endothelial dysfunction (VED) and inflammation contribute to the initiation and progression of atherosclerosis. Melatonin (MLT) normalizes lipid profile, improves endothelial function, and possesses anti-inflammatory properties. However, the precise mechanisms are still unclear. This study investigated whether MLT could ameliorate VED, inflammation, and atherosclerosis by suppressing the Toll-like receptor 4 (TLR4)/nuclear factor kappa B (NF-κB) system in high-fat-fed rabbits. Rabbits were randomly divided into three groups that received a standard diet (control group), high-cholesterol diet (atherosclerosis group), or high-cholesterol diet plus 10 mg/kg/day MLT (MLT group) for 12 wk. After treatment, high-fat diet significantly increased serum lipid and inflammatory markers in rabbits in atherosclerosis group compared with that in control group. In addition, high-fat diet also induced VED and typical atherosclerotic plaque formation and increased intima/media thickness ratio, which were significantly improved by MLT therapy as demonstrated in MLT group. Histological and immunoblot analysis further showed that high-fat diet enhanced the expressions of TLR4, myeloid differentiation primary response protein (MyD88), and NF-κB p65, but decreased inhibitor of NF-κB (IκB) expression. By contrast, MLT therapy decreased the expressions of TLR4, MyD88, and NF-κB p65 and increased IκB expression. This study has demonstrated that MLT ameliorates lipid metabolism, VED, and inflammation and inhibits the progression of atherosclerosis in high-fat-fed rabbits. Moreover, our study indicates for the first time that suppression of the TLR4/NF-κB system in local vasculature with atherosclerotic damage is important for the protective effects of MLT.
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Affiliation(s)
- Ze-Ping Hu
- Department of Cardiology, the First Affiliated Hospital, Anhui Medical University, Hefei, China
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32
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Tuñón MJ, San-Miguel B, Crespo I, Laliena A, Vallejo D, Álvarez M, Prieto J, González-Gallego J. Melatonin treatment reduces endoplasmic reticulum stress and modulates the unfolded protein response in rabbits with lethal fulminant hepatitis of viral origin. J Pineal Res 2013; 55:221-8. [PMID: 23679826 DOI: 10.1111/jpi.12063] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 04/26/2013] [Indexed: 12/15/2022]
Abstract
Hepatocyte apoptosis plays an important role in the development of fulminant hepatic failure (FHF). The objective of this study was to investigate whether endoplasmic reticulum (ER) stress and unfolded protein response (UPR) inhibition is an underlying mechanism of melatonin anti-apoptotic effects in an animal model of FHF of viral origin induced by the rabbit hemorrhagic disease virus (RHDV). Rabbits were experimentally infected with 2 × 10(4) hemagglutination units of a RHDV isolate and received melatonin at two concentrations of 10 mg/kg and 20 mg/kg at 0 hr, 12 hr and 24 hr postinfection. RHDV infection induced increased expression of CCAAT/enhancer-binding protein homologous protein (CHOP), immunoglobulin heavy chain binding protein (BiP/GRP78), glucose-regulated protein 94 (GRP94), phospho-c-Jun N-terminal kinase (JNK) and caspase-12. These effects were attenuated by melatonin. Double immunofluorescence staining showed colocalization of CHOP and cleaved caspase-3 in liver sections of RHDV-infected rabbits, while immunostaining decreased markedly with melatonin treatment. RHDV infection resulted in significant increases in the mRNA levels of activating transcription factor 6 (ATF6), ATF4, inositol-requiring enzyme 1 (IRE1), spliced X-box binding protein-1 (XBP1s) and tumor necrosis factor receptor-associated factor 2 (TRAF2). Melatonin attenuated the extent of the changes. Data obtained provide evidence that in rabbits with experimental infection by RHDV, reduction in apoptotic liver damage by melatonin is associated with attenuation of ER stress through a modulation of the three arms of UPR signaling and further support a potential hepatoprotective role of melatonin in FHF.
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MESH Headings
- Animals
- Antioxidants/pharmacology
- Apoptosis
- Caliciviridae Infections/drug therapy
- Caliciviridae Infections/genetics
- Caliciviridae Infections/metabolism
- Caliciviridae Infections/pathology
- Disease Models, Animal
- Endoplasmic Reticulum Stress/drug effects
- Hemorrhagic Disease Virus, Rabbit/metabolism
- Hepatitis, Viral, Animal/drug therapy
- Hepatitis, Viral, Animal/metabolism
- Hepatitis, Viral, Animal/pathology
- Hepatocytes/metabolism
- Hepatocytes/pathology
- Hepatocytes/virology
- Liver Failure, Acute/drug therapy
- Liver Failure, Acute/metabolism
- Liver Failure, Acute/pathology
- Liver Failure, Acute/virology
- Male
- Melatonin/pharmacology
- Rabbits
- Signal Transduction
- Unfolded Protein Response/drug effects
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Affiliation(s)
- María J Tuñón
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
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Inhibition of VEGF expression through blockade of Hif1α and STAT3 signalling mediates the anti-angiogenic effect of melatonin in HepG2 liver cancer cells. Br J Cancer 2013; 109:83-91. [PMID: 23756865 PMCID: PMC3708553 DOI: 10.1038/bjc.2013.285] [Citation(s) in RCA: 179] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/13/2013] [Accepted: 05/15/2013] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) growth relies on angiogenesis via vascular endothelial growth factor (VEGF) release. Hypoxia within tumour environment leads to intracellular stabilisation of hypoxia inducible factor 1 alpha (Hif1α) and signal transducer and activator of transcription (STAT3). Melatonin induces apoptosis in HCC, and shows anti-angiogenic features in several tumours. In this study, we used human HepG2 liver cancer cells as an in vitro model to investigate the anti-angiogenic effects of melatonin. METHODS HepG2 cells were treated with melatonin under normoxic or CoCl2-induced hypoxia. Gene expression was analysed by RT-qPCR and western blot. Melatonin-induced anti-angiogenic activity was confirmed by in vivo human umbilical vein endothelial cells (HUVECs) tube formation assay. Secreted VEGF was measured by ELISA. Immunofluorescence was performed to analyse Hif1α cellular localisation. Physical interaction between Hif1α and its co-activators was analysed by immunoprecipitation and chromatin immunoprecipitation (ChIP). RESULTS Melatonin at a pharmacological concentration (1 mM) decreases cellular and secreted VEGF levels, and prevents HUVECs tube formation under hypoxia, associated with a reduction in Hif1α protein expression, nuclear localisation, and transcriptional activity. While hypoxia increases phospho-STAT3, Hif1α, and CBP/p300 recruitment as a transcriptional complex within the VEGF promoter, melatonin 1 mM decreases their physical interaction. Melatonin and the selective STAT3 inhibitor Stattic show a synergic effect on Hif1α, STAT3, and VEGF expression. CONCLUSION Melatonin exerts an anti-angiogenic activity in HepG2 cells by interfering with the transcriptional activation of VEGF, via Hif1α and STAT3. Our results provide evidence to consider this indole as a powerful anti-angiogenic agent for HCC treatment.
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Çoban J, Betül-Kalaz E, Küçükgergin C, Aydın AF, Doğan-Ekici I, Doğru-Abbasoğlu S, Uysal M. Blueberry treatment attenuates D-galactose-induced oxidative stress and tissue damage in rat liver. Geriatr Gerontol Int 2013; 14:490-7. [DOI: 10.1111/ggi.12096] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Jale Çoban
- Department of Biochemistry; Yeditepe University Medical Faculty; Istanbul Turkey
| | - Esra Betül-Kalaz
- Department of Biochemistry; Istanbul Medical Faculty; Istanbul University; Istanbul Turkey
| | - Canan Küçükgergin
- Department of Biochemistry; Istanbul Medical Faculty; Istanbul University; Istanbul Turkey
| | - A Fatih Aydın
- Department of Biochemistry; Istanbul Medical Faculty; Istanbul University; Istanbul Turkey
| | - Işın Doğan-Ekici
- Department of Pathology; Yeditepe University Medical Faculty; Istanbul Turkey
| | - Semra Doğru-Abbasoğlu
- Department of Biochemistry; Istanbul Medical Faculty; Istanbul University; Istanbul Turkey
| | - Müjdat Uysal
- Department of Biochemistry; Istanbul Medical Faculty; Istanbul University; Istanbul Turkey
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35
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Apolipoprotein E deficiency and a mouse model of accelerated liver aging. Biogerontology 2013; 14:209-20. [DOI: 10.1007/s10522-013-9424-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Accepted: 04/10/2013] [Indexed: 10/27/2022]
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Mauriz JL, Collado PS, Veneroso C, Reiter RJ, González-Gallego J. A review of the molecular aspects of melatonin's anti-inflammatory actions: recent insights and new perspectives. J Pineal Res 2013; 54:1-14. [PMID: 22725668 DOI: 10.1111/j.1600-079x.2012.01014.x] [Citation(s) in RCA: 454] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Melatonin is a highly evolutionary conserved endogenous molecule that is mainly produced by the pineal gland, but also by other nonendocrine organs, of most mammals including man. In the recent years, a variety of anti-inflammatory and antioxidant effects have been observed when melatonin is applied exogenously under both in vivo and in vitro conditions. A number of studies suggest that this indole may exert its anti-inflammatory effects through the regulation of different molecular pathways. It has been documented that melatonin inhibits the expression of the isoforms of inducible nitric oxide synthase and cyclooxygenase and limits the production of excessive amounts of nitric oxide, prostanoids, and leukotrienes, as well as other mediators of the inflammatory process such as cytokines, chemokines, and adhesion molecules. Melatonin's anti-inflammatory effects are related to the modulation of a number of transcription factors such as nuclear factor kappa B, hypoxia-inducible factor, nuclear factor erythroid 2-related factor 2, and others. Melatonin's effects on the DNA-binding capacity of transcription factors may be regulated through the inhibition of protein kinases involved in signal transduction, such as mitogen-activated protein kinases. This review summarizes recent research data focusing on the modulation of the expression of different inflammatory mediators by melatonin and the effects on cell signaling pathways responsible for the indole's anti-inflammatory activity. Although there are a numerous published reports that have analyzed melatonin's anti-inflammatory properties, further studies are necessary to elucidate its complex regulatory mechanisms in different cellular types and tissues.
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Affiliation(s)
- José L Mauriz
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) and Institute of Biomedicine, University of León, León, Spain Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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37
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Liang YL, Zhang ZH, Liu XJ, Liu XQ, Tao L, Zhang YF, Wang H, Zhang C, Chen X, Xu DX. Melatonin protects against apoptosis-inducing factor (AIF)-dependent cell death during acetaminophen-induced acute liver failure. PLoS One 2012; 7:e51911. [PMID: 23272189 PMCID: PMC3525654 DOI: 10.1371/journal.pone.0051911] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 11/07/2012] [Indexed: 12/11/2022] Open
Abstract
Acetaminophen (APAP) overdose is the most frequent cause of acute liver failure and is primarily caused by cytochrome P450 (CYP) 2E1-driven conversion of APAP into hepatotoxic metabolites. Several reports showed that melatonin attenuated APAP-induced acute liver failure. Nevertheless, the exact mechanism remains obscure. In the present study, we investigated the effects of melatonin on apoptosis-inducing factor (AIF)-dependent cell death in APAP-induced acute liver failure. Mice were intraperitoneally (i.p.) injected with different doses of melatonin (1.25, 5, 20 mg/kg) 30 min before APAP (300 mg/kg, i.p.). As expected, melatonin significantly alleviated APAP-induced cell death, as determined by TdT-mediated dUTP-biotin nick end labeling (TUNEL) assay. Further analysis showed that melatonin significantly attenuated APAP-induced activation of the serine/threonine kinase receptor interacting protein 1 (RIP1). In addition, melatonin inhibited APAP-induced hepatic c-Jun N-terminal kinase (JNK) phosphorylation and mitochondrial Bax translocation. Correspondingly, melatonin inhibited APAP-induced translocation of AIF from mitochondria to nuclei. Interestingly, no changes were induced by melatonin on hepatic CYP2E1 expression. In addition, melatonin had little effect on APAP-induced hepatic glutathione (GSH) depletion. In conclusion, melatonin protects against AIF-dependent cell death during APAP-induced acute liver failure through its direct inhibition of hepatic RIP1 and subsequent JNK phosphorylation and mitochondrial Bax translocation.
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Affiliation(s)
- Ying-Li Liang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Zhi-Hui Zhang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Xiao-Jing Liu
- Department of Toxicology, Anhui Medical University, Hefei, China
- First Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Xiao-Qian Liu
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Li Tao
- First Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Ye-Fa Zhang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Hua Wang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Cheng Zhang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Xi Chen
- First Affiliated Hospital, Anhui Medical University, Hefei, China
- * E-mail: (DXX); (XC)
| | - De-Xiang Xu
- Department of Toxicology, Anhui Medical University, Hefei, China
- * E-mail: (DXX); (XC)
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Improvement of oxidative stress and immunity by melatonin: an age dependent study in golden hamster. Exp Gerontol 2012; 48:168-82. [PMID: 23220117 DOI: 10.1016/j.exger.2012.11.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 11/23/2012] [Accepted: 11/26/2012] [Indexed: 01/07/2023]
Abstract
Reactive oxygen species (ROS) have been proposed to play an important role in balancing the pro- and antioxidant homeostasis during aging. Melatonin has been suggested as an effective free radical scavenger that might have a role during the process of aging. We observed, that melatonin administration (25 μg/100 g body weight for 30 days) significantly augments the activity of anti-oxidative enzymes like superoxide dismutase (SOD), catalase and glutathione peroxidase (GPx) in the plasma, spleen and bone marrow (BM) of young (6 weeks), adult (30 weeks) and old aged (2.5 years) male golden hamster, Mesocricetus auratus. A sharp decline in generation of ROS was observed in peripheral blood mononuclear cells (PBMC) and splenocytes upon melatonin administration in different age group of hamsters. Reduction in the level of thiobarbituric acid-reactive substances (TBARS) and total nitrite and nitrate concentration as metabolites and indicators of nitric oxide (NO) in plasma, spleen and BM were observed along with night time (22:00 h) melatonin concentration in different age group of hamsters after administration of melatonin and compared to the control group (treated with 0.9% saline). General immune parameters like proliferation of splenocytes, PBMC and colony forming ability of GM-CFU were observed following melatonin treatment in different age group, although it was low only in aged hamsters compared to the young and adult. Our data indicates that the age related increase of oxidative load and simultaneously augments the general immunity in aged hamsters.
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Xia MZ, Liang YL, Wang H, Chen X, Huang YY, Zhang ZH, Chen YH, Zhang C, Zhao M, Xu DX, Song LH. Melatonin modulates TLR4-mediated inflammatory genes through MyD88- and TRIF-dependent signaling pathways in lipopolysaccharide-stimulated RAW264.7 cells. J Pineal Res 2012; 53:325-34. [PMID: 22537289 DOI: 10.1111/j.1600-079x.2012.01002.x] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Increasing evidence demonstrates that melatonin has an anti-inflammatory effect. Nevertheless, the molecular mechanisms remain obscure. In this study, we investigated the effect of melatonin on toll-like receptor 4 (TLR4)-mediated molecule myeloid differentiation factor 88 (MyD88)-dependent and TRIF-dependent signaling pathways in lipopolysaccharide (LPS)-stimulated macrophages. RAW264.7 cells were incubated with LPS (2.0 μg/mL) in the absence or presence of melatonin (10, 100, 1000 μm). As expected, melatonin inhibited TLR4-mediated tumor necrosis factor alpha (TNF-α), interleukin (IL)-1β, IL-6, IL-8, and IL-10 in LPS-stimulated macrophages. In addition, melatonin significantly attenuated LPS-induced upregulation of cyclooxygenase (COX)-2 and inducible nitric oxide synthase (iNOS) in macrophages. Further analysis showed that melatonin inhibited the expression of MyD88 in LPS-stimulated macrophages. Although it had no effect on TLR4-mediated phosphorylation of c-Jun N-terminal kinase (JNK), p38, and extracellular regulated protein kinase (ERK), melatonin significantly attenuated the activation of nuclear factor kappa B (NF-κB) in LPS-stimulated macrophages. In addition, melatonin inhibited TLR4-mediated Akt phosphorylation in LPS-stimulated macrophages. Moreover, melatonin significantly attenuated the elevation of interferon (IFN)-regulated factor-3 (IRF3), which was involved in TLR4-mediated TRIF-dependent signaling pathway, in LPS-stimulated macrophages. Correspondingly, melatonin significantly alleviated LPS-induced IFN-β in macrophages. In conclusion, melatonin modulates TLR4-mediated inflammatory genes through MyD88-dependent and TRIF-dependent signaling pathways.
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Affiliation(s)
- Mi-Zhen Xia
- Life Science College, Anhui Agricultural University, Hefei, China
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40
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Manikonda PK, Jagota A. Melatonin administration differentially affects age-induced alterations in daily rhythms of lipid peroxidation and antioxidant enzymes in male rat liver. Biogerontology 2012; 13:511-24. [PMID: 22960749 DOI: 10.1007/s10522-012-9396-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Accepted: 08/16/2012] [Indexed: 12/31/2022]
Abstract
A central clock/pacemaker, suprachiasmatic nuclei of the hypothalamus coordinates and entrains circadian oscillations in the peripheral tissues such as the liver, kidney, heart, lungs etc. called peripheral clocks. These also have endogenous circadian oscillations. The circadian rhythms of antioxidants present in cytosol signify redox state of the cell during day/night cycle. The liver has a major impact on homeostasis through its control on serum protein composition and plays a pivotal role in the metabolism of nutrients, drugs, hormones, and metabolic waste products and undergoes substantial changes in structure and function upon aging. In present study, the temporal patterns of oxidative stress indicators in liver were studied. Daily rhythms of lipid peroxidation end products, reduced glutathione (GSH), oxidized glutathione (GSSG) and antioxidant enzymes such as glutathione peroxidase (GPx), superoxide dismutase (SOD) and catalase (CAT) were studied in liver at variable time points (Zeitgeber Time (ZT) 0, 6, 12 and 18) in three age groups: 3 (adult), 12 and 24 months old male Wistar rats. There was increase in oxidative stress in 12 and 24 months old rats indicated through a significant increase in lipid peroxidation, decrease in GSH/GSSG ratio and antioxidant enzyme activities. In 3 months old rats, lipid peroxidation was maximum at ZT-12 whereas GSH, SOD and CAT activities were minimum at ZT-12. The maximum level in 24 h i.e., acrophases of lipid peroxidation, GPx, SOD and CAT activities in liver cell free extracts altered upon aging. As melatonin, messenger of darkness, an endogenous synchronizer of rhythm, an antioxidant and an antiaging drug, declines with aging we studied the effects of melatonin on activities of these antioxidant enzymes in aging rats. Melatonin administration resulted in differential restoration of acrophases, amplitude, mean as well as daily rhythms of lipid peroxidation and antioxidants in liver of 12 and 24 months old rats.
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Affiliation(s)
- Pavan Kumar Manikonda
- Neurobiology and Molecular Chronobiology Laboratory, Department of Animal Sciences, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India.
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González MA, del Carmen Contini M, Millen N, Mahieu ST. Role of melatonin in the oxidative damage prevention at different times of hepatic regeneration. Cell Biochem Funct 2012; 30:701-8. [DOI: 10.1002/cbf.2855] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 04/20/2012] [Accepted: 05/28/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Marcela Aida González
- Facultad de Bioquímica y Ciencias Biológicas, Departamento de Ciencias Biológicas; Universidad Nacional del Litoral; Santa Fe; Argentina
| | - María del Carmen Contini
- Facultad de Bioquímica y Ciencias Biológicas, Cátedra de Fisiología Humana; Universidad Nacional del Litoral; Santa Fe; Argentina
| | - Nestor Millen
- Facultad de Bioquímica y Ciencias Biológicas, Cátedra de Fisiología Humana; Universidad Nacional del Litoral; Santa Fe; Argentina
| | - Stella Teresita Mahieu
- Facultad de Bioquímica y Ciencias Biológicas, Cátedra de Fisiología Humana; Universidad Nacional del Litoral; Santa Fe; Argentina
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Ferreira DS, Amaral FG, Mesquita CC, Barbosa APL, Lellis-Santos C, Turati AO, Santos LR, Sollon CS, Gomes PR, Faria JA, Cipolla-Neto J, Bordin S, Anhê GF. Maternal melatonin programs the daily pattern of energy metabolism in adult offspring. PLoS One 2012; 7:e38795. [PMID: 22719949 PMCID: PMC3373595 DOI: 10.1371/journal.pone.0038795] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Accepted: 05/10/2012] [Indexed: 11/19/2022] Open
Abstract
Background Shift work was recently described as a factor that increases the risk of Type 2 diabetes mellitus. In addition, rats born to mothers subjected to a phase shift throughout pregnancy are glucose intolerant. However, the mechanism by which a phase shift transmits metabolic information to the offspring has not been determined. Among several endocrine secretions, phase shifts in the light/dark cycle were described as altering the circadian profile of melatonin production by the pineal gland. The present study addresses the importance of maternal melatonin for the metabolic programming of the offspring. Methodology/Principal Findings Female Wistar rats were submitted to SHAM surgery or pinealectomy (PINX). The PINX rats were divided into two groups and received either melatonin (PM) or vehicle. The SHAM, the PINX vehicle and the PM females were housed with male Wistar rats. Rats were allowed to mate and after weaning, the male and female offspring were subjected to a glucose tolerance test (GTT), a pyruvate tolerance test (PTT) and an insulin tolerance test (ITT). Pancreatic islets were isolated for insulin secretion, and insulin signaling was assessed in the liver and in the skeletal muscle by western blots. We found that male and female rats born to PINX mothers display glucose intolerance at the end of the light phase of the light/dark cycle, but not at the beginning. We further demonstrate that impaired glucose-stimulated insulin secretion and hepatic insulin resistance are mechanisms that may contribute to glucose intolerance in the offspring of PINX mothers. The metabolic programming described here occurs due to an absence of maternal melatonin because the offspring born to PINX mothers treated with melatonin were not glucose intolerant. Conclusions/Significance The present results support the novel concept that maternal melatonin is responsible for the programming of the daily pattern of energy metabolism in their offspring.
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Affiliation(s)
- Danilo S. Ferreira
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - Fernanda G. Amaral
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Caroline C. Mesquita
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - Ana Paula L. Barbosa
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - Camilo Lellis-Santos
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Ariane O. Turati
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Laila R. Santos
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Carolina S. Sollon
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - Patricia R. Gomes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Juliana A. Faria
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Silvana Bordin
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Gabriel F. Anhê
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
- * E-mail:
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Esrefoglu M, Iraz M, Ates B, Gul M. Melatonin and CAPE are Able to Prevent the Liver from Oxidative Damage in Rats: An Ultrastructural and Biochemical Study. Ultrastruct Pathol 2012; 36:171-8. [DOI: 10.3109/01913123.2011.647262] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Helmy MM. Potential hepato-protective effect of α-tocopherol or simvastatin in aged rats. Pharmacol Rep 2012; 64:698-705. [DOI: 10.1016/s1734-1140(12)70864-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 12/13/2011] [Indexed: 01/21/2023]
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45
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Histochemistry evaluation of the oxidative stress and the antioxidant status in Cu-supplemented cattle. Animal 2012; 6:1435-43. [DOI: 10.1017/s1751731112000535] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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Contini MDC, Millen N, González M, Mahieu S. Melatonin prevents oxidative stress in ovariectomized rats treated with aluminium. Biol Trace Elem Res 2011; 144:924-43. [PMID: 21537923 DOI: 10.1007/s12011-011-9060-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Accepted: 04/08/2011] [Indexed: 12/14/2022]
Abstract
This study is designed to determine the simultaneous effect of aluminium (Al) and melatonin (Mel) treatment in intact and ovariectomized (Ovx) female rats on oxidative stress and their inter-organ relationship in the kidney and liver. Al-treated rats received an intra-peritoneal injection of solution of aluminium lactate (0.575 mg Al/100 g of body weight, three times a week), during 12 weeks. Mel groups received intra-peritoneal injections of melatonin at a dose of 10 mg/kg/day, 5 days/week, during 12 weeks. The results of this study showed that Al treatment in female rats modifies homeostasis of glutathione and the antioxidant capacity of the rat liver and kidney. The alteration of glutathione homeostasis and oxidative status was not associated with an increased lipid peroxidation in both organs with the exception of the increase observed in the liver of Ovx rats. Al also induced modifications in the activity of some enzymes related to the glutathione cycle: GSH-Px in the liver and kidney and glutathione reductase only in the kidney. Al exposure decreased CAT activity in both the kidney and liver of intact and Ovx groups. The administration of Mel in the intact and castrated females treated with Al seems to reduce oxidative changes in the liver and kidney of intact and Ovx rats.
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Affiliation(s)
- María del Carmen Contini
- Laboratorio de Investigaciones Fisiológicas Experimentales. Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, Paraje El Pozo. CC 242, 3000, Santa Fe, Argentina.
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Choi SI, Dadakhujaev S, Ryu H, Im Kim T, Kim EK. Melatonin protects against oxidative stress in granular corneal dystrophy type 2 corneal fibroblasts by mechanisms that involve membrane melatonin receptors. J Pineal Res 2011; 51:94-103. [PMID: 21392093 DOI: 10.1111/j.1600-079x.2011.00866.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Considering that oxidative stress plays a role in corneal fibroblast degeneration during granular corneal dystrophy type 2 (GCD2) and melatonin is an effective antioxidant, we examined the ability of melatonin to protect against oxidative stress-induced cell death of primary cultured normal and GCD2-homozygous corneal fibroblasts. Melatonin treatment protected primary cultured normal and GCD2 corneal fibroblasts from paraquat (PQ)-induced oxidative stress and caused increased expression levels of Cu/Zn-superoxide dismutase (SOD1) and glutathione reductase (GR) in both types of cells. Interestingly, catalase expression increased in normal corneal fibroblasts, but decreased in GCD2 corneal fibroblasts after melatonin treatment. Melatonin also reduced the levels of intracellular reactive oxygen species and H(2)O(2) in both cell types. In addition, the selective melatonin receptor antagonist luzindole blocked melatonin-induced expression of SOD1 and GR. The expression levels of melatonin receptors 1A (MT1) and 1B (MT2) were significantly higher in GCD2 corneal fibroblasts than in normal cells. These results suggest that increased expression of melatonin receptors may be involved in the defense mechanisms against oxidative stress in GCD2 corneal fibroblasts, and melatonin may have potential therapeutic implications for GCD2 treatment.
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Nogueira TC, Lellis-Santos C, Jesus DS, Taneda M, Rodrigues SC, Amaral FG, Lopes AMS, Cipolla-Neto J, Bordin S, Anhê GF. Absence of melatonin induces night-time hepatic insulin resistance and increased gluconeogenesis due to stimulation of nocturnal unfolded protein response. Endocrinology 2011; 152:1253-63. [PMID: 21303940 DOI: 10.1210/en.2010-1088] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
It is known that the circadian rhythm in hepatic phosphoenolpyruvate carboxykinase expression (a limiting catalytic step of gluconeogenesis) and hepatic glucose production is maintained by both daily oscillation in autonomic inputs to the liver and night feeding behavior. However, increased glycemia and reduced melatonin (Mel) levels have been recently shown to coexist in diabetic patients at the end of the night period. In parallel, pinealectomy (PINX) is known to cause glucose intolerance with increased basal glycemia exclusively at the end of the night. The mechanisms that underlie this metabolic feature are not completely understood. Here, we demonstrate that PINX rats show night-time hepatic insulin resistance characterized by reduced insulin-stimulated RAC-α serine/threonine-protein kinase phosphorylation and increased phosphoenolpyruvate carboxykinase expression. In addition, PINX rats display increased conversion of pyruvate into glucose at the end of the night. The regulatory mechanism suggests the participation of unfolded protein response (UPR), because PINX induces night-time increase in activating transcription factor 6 expression and prompts a circadian fashion of immunoglobulin heavy chain-binding protein, activating transcription factor 4, and CCAAT/enhancer-binding protein-homologous protein expression with Zenith values at the dark period. PINX also caused a night-time increase in Tribble 3 and regulatory-associated protein of mammalian target of rapamycin; both were reduced in liver of PINX rats treated with Mel. Treatment of PINX rats with 4-phenyl butyric acid, an inhibitor of UPR, restored night-time hepatic insulin sensitivity and abrogated gluconeogenesis in PINX rats. Altogether, the present data show that a circadian oscillation of UPR occurs in the liver due to the absence of Mel. The nocturnal UPR activation is related with night-time hepatic insulin resistance and increased gluconeogenesis in PINX rats.
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Affiliation(s)
- Tatiane C Nogueira
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo 05508-900, Brazil
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Murawska-CiaŁowicz E, Jethon Z, Magdalan J, Januszewska L, Podhorska-OkoŁów M, Zawadzki M, Sozański T, Dzięgiel P. Effects of melatonin on lipid peroxidation and antioxidative enzyme activities in the liver, kidneys and brain of rats administered with benzo(a)pyrene. ACTA ACUST UNITED AC 2011; 63:97-103. [DOI: 10.1016/j.etp.2009.10.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2009] [Revised: 09/30/2009] [Accepted: 10/22/2009] [Indexed: 10/20/2022]
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Rosa DPD, Bona S, Simonetto D, Zettler C, Marroni CA, Marroni NP. Melatonin protects the liver and erythrocytes against oxidative stress in cirrhotic rats. ARQUIVOS DE GASTROENTEROLOGIA 2010; 47:72-8. [PMID: 20520979 DOI: 10.1590/s0004-28032010000100013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Accepted: 03/23/2009] [Indexed: 12/11/2022]
Abstract
CONTEXT Cirrhosis is a progressive chronic hepatopathy which constitutes an irreversible stage of liver dysfunction. OBJECTIVES To evaluate the oxidative stress in the blood of cirrhotic rats treated with the antioxidant melatonin. METHODS Cirrhosis was induced through inhalation of carbon tetrachloride. Liver integrity was evaluated by measuring serum enzymes, oxidative damage measured by lipoperoxidation, and antioxidant enzyme activity in erythrocytes. Lipoperoxidation, total nitrates, collagen, and histology by picrosirius staining were evaluated in the livers of these animals (n = 15), which were divided in three groups: control, carbon tetrachloride, and carbon tetrachloride + melatonin. Melatonin (20 mg/kg) was administered intraperitoneal from week 10 of carbon tetrachloride inhalation. In order to shorten the cirrhosis induction time, phenobarbital (0.3 g/L) was added to the animals' drinking water. RESULTS A significant impairment in the liver integrity of melatonin-treated animals as compared to cirrhotic animals was observed. In rat erythrocytes and liver, lipoperoxidation was significantly increased in the cirrhotic rats as compared to controls, as measured through thiobarbituric acid reactive substances, and significantly decreased in melatonin-treated animals as compared to cirrhotic ones. In blood, a decrease in superoxide dismutase and glutathione peroxidase enzymes was detected in the cirrhotic group as compared to the control group, with increased superoxide dismutase activity when melatonin was administered. A reduction in the levels of total nitrates was detected in the hepatic tissue of the animals in the carbon tetrachloride group as compared to the control group and an increase of these levels in the carbon tetrachloride + melatonin group. As for hepatic collagen, we found a significant increase in the carbon tetrachloride group as compared to the controls and a regression of these values in the treated group. In histology, the rats in the carbon tetrachloride group showed fibrosis and formation of fibrotic nodules, characterizing liver cirrhosis; there was reduction of nodules and fibrosis in the melatonin treated group. CONCLUSION The data allow us to suggest that the observed oxidative stress is related to the damages caused by carbon tetrachloride and that the use of melatonin can minimize these damages.
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