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Fascetti AJ, Larsen JA, Min A, Nair M, Montano M, Giulivi C. Exploring the impact of age, and body condition score on erythrocytic B 1-Dependent transketolase activity in cats: A comprehensive analysis of thiamine status. Heliyon 2024; 10:e34188. [PMID: 39113982 PMCID: PMC11305241 DOI: 10.1016/j.heliyon.2024.e34188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 07/02/2024] [Accepted: 07/04/2024] [Indexed: 08/10/2024] Open
Abstract
One of the key factors influencing aging and morbidity is the overall antioxidant status and regenerative capacity. In examining contributors to the antioxidant status, we analyzed the thiamine status in felines and the influence of age, gender, and body condition score. We measured erythrocytic B1-dependent specific transketolase (STKT) activity, an enzyme in the pentose phosphate pathway, in a group of 60 sexually intact, healthy, and specific pathogen-free felines (44 females, 16 males, aged 1-17 years) with thiamine diphosphate (TDP; 0.3 and 3 mM) and without it. Only two parameters (STKT activity with and without 0.3 mM TDP) decreased with age. After adjusting for age, statistical thresholds were established using these and other age-independent parameters, identifying 15 felines with subclinical thiamine deficiency. The red blood cell proteomics analysis revealed that the pentose phosphate shunt, glycolysis, and oxidative stress response were the most affected pathways in deficient felines, confirming the above diagnosis. Age emerged as the primary factor associated with thiamine deficiency, supported by the enrichment of neurodegenerative diseases with a proteotoxicity component; five young-adult felines showed marginal or acute B1 deficiency, and six were adult-mature with a more chronic deficiency, possibly linked to cognitive decline, all with an underweight to ideal body condition scores. Only three senior-adult felines were deficient and overweight-obese. Detecting thiamine deficiency emphasizes the need for more accurate reference values, the establishment of advanced preventive or therapeutic measures to enhance the well-being of aging companion animals, and potential extensions to human health, particularly concerning cognitive function.
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Affiliation(s)
- Andrea J. Fascetti
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
| | - Jennifer A. Larsen
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
| | - Angela Min
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
| | - Maya Nair
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
| | - Maria Montano
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
| | - Cecilia Giulivi
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, United States
- MIND Institute, University of California at Davis Medical Center, Sacramento, CA, United States
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Brembati V, Faustini G, Longhena F, Bellucci A. Alpha synuclein post translational modifications: potential targets for Parkinson's disease therapy? Front Mol Neurosci 2023; 16:1197853. [PMID: 37305556 PMCID: PMC10248004 DOI: 10.3389/fnmol.2023.1197853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 04/27/2023] [Indexed: 06/13/2023] Open
Abstract
Parkinson's disease (PD) is the most common neurodegenerative disorder with motor symptoms. The neuropathological alterations characterizing the brain of patients with PD include the loss of dopaminergic neurons of the nigrostriatal system and the presence of Lewy bodies (LB), intraneuronal inclusions that are mainly composed of alpha-synuclein (α-Syn) fibrils. The accumulation of α-Syn in insoluble aggregates is a main neuropathological feature in PD and in other neurodegenerative diseases, including LB dementia (LBD) and multiple system atrophy (MSA), which are therefore defined as synucleinopathies. Compelling evidence supports that α-Syn post translational modifications (PTMs) such as phosphorylation, nitration, acetylation, O-GlcNAcylation, glycation, SUMOylation, ubiquitination and C-terminal cleavage, play important roles in the modulation α-Syn aggregation, solubility, turnover and membrane binding. In particular, PTMs can impact on α-Syn conformational state, thus supporting that their modulation can in turn affect α-Syn aggregation and its ability to seed further soluble α-Syn fibrillation. This review focuses on the importance of α-Syn PTMs in PD pathophysiology but also aims at highlighting their general relevance as possible biomarkers and, more importantly, as innovative therapeutic targets for synucleinopathies. In addition, we call attention to the multiple challenges that we still need to face to enable the development of novel therapeutic approaches modulating α-Syn PTMs.
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Affiliation(s)
| | | | | | - Arianna Bellucci
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
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3
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Rahbarghazi A, Alamdari KA, Rahbarghazi R, Salehi-Pourmehr H. Co-administration of exercise training and melatonin on the function of diabetic heart tissue: a systematic review and meta-analysis of rodent models. Diabetol Metab Syndr 2023; 15:67. [PMID: 37005639 PMCID: PMC10067225 DOI: 10.1186/s13098-023-01045-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/27/2023] [Indexed: 04/04/2023] Open
Abstract
PURPOSE Diabetes mellitus (DM), a hyperglycemic condition, occurs due to the failure of insulin secretion and resistance. This study investigated the combined effects of exercise training and melatonin (Mel) on the function of heart tissue in diabetic rodent models. METHODS A systematic search was conducted in Embase, ProQuest, Cochrane library, Clinicaltrial.gov, WHO, Google Scholar, PubMed, Ovid, Scopus, Web of Science, Ongoing Trials Registers, and Conference Proceedings in July 2022 with no limit of date or language. All trials associated with the effect of Mel and exercise in diabetic rodent models were included. Of the 962 relevant publications, 58 studies met our inclusion criteria as follows; Mel and type 1 DM (16 studies), Mel and type 2 DM (6 studies), exercise and type 1 DM (24 studies), and exercise and type 2 DM (12 studies). Meta-analysis of the data was done using the Mantel Haenszel method. RESULTS In most of these studies, antioxidant status and oxidative stress, inflammatory response, apoptosis rate, lipid profiles, and glucose levels were monitored in diabetic heart tissue. According to our findings, both Mel and exercise can improve antioxidant capacity by activating antioxidant enzymes compared to the control diabetic groups (p < 0.05). The levels of pro-inflammatory cytokines, especially TNF-α were reduced in diabetic rodents after being treated with Mel and exercise. Apoptotic changes were diminished in diabetic rodents subjected to the Mel regime and exercise in which p53 levels and the activity of Caspases reached near normal levels (p < 0.05). Based on the data, both Mel and exercise can change the lipid profile in diabetic rodents, especially rats, and close it to near-to-control levels. CONCLUSION These data showed that exercise and Mel can reduce the harmful effects of diabetic conditions on the heart through the regulation of lipid profile, antioxidant capacity, apoptosis, and inflammation.
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Affiliation(s)
- Afshin Rahbarghazi
- Department of Physical Education and Sports Sciences, Faculty of Educational Science and Psychology, University of Mohaghegh Ardabil, Daneshgah Street, Ardabil, 56199-11367 Iran
- Stem Cell Research Center, Tabriz University of Medical Sciences, Imam Reza St., Golgasht St, Tabriz, Iran
| | | | - Reza Rahbarghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Imam Reza St., Golgasht St, Tabriz, Iran
- Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hanieh Salehi-Pourmehr
- Research Center for Evidence-Based Medicine, Iranian EBM Centre: A Joanna Briggs Institute (JBI) Center of Excellence, Tabriz University of Medical Sciences, Tabriz, Iran
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Anti-Inflammatory Effects of Melatonin in Rats with Induced Type 2 Diabetes Mellitus. Life (Basel) 2022; 12:life12040574. [PMID: 35455066 PMCID: PMC9029934 DOI: 10.3390/life12040574] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 12/29/2022] Open
Abstract
Introduction: Insulin resistance is associated with a pro-inflammatory state increasing the risk for complications in patients with type 2 diabetes mellitus (T2DM). In addition to its chronobiotic effects, the pineal hormone melatonin is known to exert anti-inflammatory and antioxidant effects. Melatonin was also suggested to affect insulin secretion. The aim of this study was therefore to investigate the effect of melatonin on inflammation in diabetic rats and to study the possible involvement of the melatonin receptor, MT2. Materials and Methods: Male Sprague Dawley rats were randomly divided into four experimental groups (n = 10 per group): (1) control, (2) streptozotocin/nicotinamide induced diabetes type 2 (T2DM), (3) T2DM treated with melatonin (500 µg/kg/day), and (4) T2DM treated with melatonin (500 µg/kg/day for 6 weeks) and the selective MT2 receptor antagonist luzindole (0.25 g/kg/day for 6 weeks). Blood samples were taken for biochemical parameters and various tissue samples (liver, adipose tissue, brain) were removed for immunohistochemistry (IHC), Western blot (WB), and Q-PCR analyses, respectively. Results: Melatonin significantly reduced increased blood levels of liver transaminases (AST, ALT), blood urea nitrogen (BUN), triglyceride, very low-density lipoprotein (VLDL), and cholesterol in diabetic rats with luzindole treatment partly reversing this effect regarding the lipids. Furthermore, the liver and adipose tissues of T2DM rats treated with melatonin showed lower expression of the inflammatory markers IL-1β, IL-6, TNF-α, and NF-κB as compared to the T2DM group without melatonin. The results also showed that the MT2 receptor is at least partly involved in the protective effects of melatonin. Conclusions: Our results suggest that melatonin exerts relevant anti-inflammatory effects on various tissues in type 2 diabetic rats.
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Yapislar H, Haciosmanoglu E, Sarioglu T, Ekmekcioglu C. The melatonin MT 2 receptor is involved in the anti-apoptotic effects of melatonin in rats with type 2 diabetes mellitus. Tissue Cell 2022; 76:101763. [PMID: 35247789 DOI: 10.1016/j.tice.2022.101763] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 02/10/2022] [Accepted: 02/18/2022] [Indexed: 01/14/2023]
Abstract
Type 2 diabetes mellitus (T2DM) is a widely prevalent chronic disease and risk factor for several other diseases, such as cardiovascular diseases, neuropathy, nephropathy, and retinopathy. Apoptosis is a homeostatic mechanism to maintain cell numbers at a certain level in tissues. Chronic high blood glucose levels might lead to mitochondrial dysfunction and trigger undesirable apoptosis in T2DM. The pineal hormone melatonin has been shown to regulate apoptosis. The aim of this study was to investigate the impact of the melatonin MT2 receptor in the role of melatonin to prevent undesirable apotosis in different tissues of diabetic rats. Male Sprague Dawley rats were randomly divided into 4 groups; 1. Control group (only vehicle), 2. Diabetic group (streptozotozin/nicotinamide treated), 3. Diabetic group treated with melatonin (500μg/kg/day), and 4. Diabetic group treated with melatonin (500 μg/kg/day for 6 weeks) and the selective MT2 receptor antagonist luzindole (0.25 g/kg/day for 6 weeks). Various tissue samples (kidney, liver, adipose tissue, pancreas) were removed after 6 weeks for immunohistochemistry and western blot analysis. Our results demonstrated an increased rate of apoptosis in different tissues of diabetic rats compared to controls with melatonin reducing the apoptotic rate in the tissues of rats with T2DM. Furthermore, the anti-apoptotic effects of melatonin were partly mediated by the melatonin MT2 receptor.
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Affiliation(s)
- Hande Yapislar
- Acibadem University, School of Medicine, Department of Physiology, 34684, Istanbul, Turkey.
| | - Ebru Haciosmanoglu
- Faculty of Medicine, Department of Biophysics, Bezmialem Vakif University, Istanbul, Turkey
| | - Turkan Sarioglu
- Department of Histology and Embryology, Fundamental Sciences, Faculty of Dentistry, Istanbul Kent University Istanbul, Turkey
| | - Cem Ekmekcioglu
- Department of Environmental Health, Center for Public Health, Medical University of Vienna, 1090, Vienna, Austria
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Louis MBP, França DCH, Queiroz AA, Calderon IDMP, França EL, Honorio-França AC. Melatonin Hormone Acts on Cells of Maternal Blood and Placenta From Diabetic Mothers. Front Physiol 2022; 12:765928. [PMID: 35126170 PMCID: PMC8814459 DOI: 10.3389/fphys.2021.765928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/14/2021] [Indexed: 11/13/2022] Open
Abstract
Changes in glucose metabolism of diabetic mothers affect immunological components, proinflammatory factors, and placental hypervascularization that can induce cell death. The hormone melatonin has been identified as a potential modulating agent. The aim of this study was to analyze the oxidative process and the apoptosis in maternal blood and placental cells modulated by melatonin from diabetic mothers. The groups were 40 pregnant women divided into non-diabetic (ND) and type 2 diabetes mellitus (T2DM) groups. Blood and placental cells were obtained by density gradient and maintained in culture treated or not with melatonin (100 ng/mL) for 24 h (37°C, 5% CO2). Oxidative stress was evaluated by superoxide release and CuZn superoxide dismutase (SOD). Apoptosis was assessed by flow cytometry. Maternal hyperglycemia increased superoxide release and apoptosis in MN cells from maternal blood and reduced SOD level and SOD/O2- ratio. Melatonin reduced oxidative stress and apoptosis rates in MN cells in the blood of diabetic mothers. There was a reduction in SOD and SOD/O2- ratio in the placental extravillous layer, and melatonin restored the concentrations of this enzyme. There was greater superoxide release, reduced SOD/O2- ratio, and apoptosis in MN cells placental villous layer. Melatonin increased apoptosis rates in the placental villous layer from hyperglycemic mothers. These data suggest that hyperglycemia altered the processes oxidative in blood and placenta from hyperglycemic mothers. These changes reflected in the mechanisms of induction of apoptosis, especially in the vascularized layers of the placenta, and were modulated by melatonin.
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Affiliation(s)
- Martino B. Pierre Louis
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Brazil
| | - Danielle Cristina Honorio França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Brazil
- Medical Course, State University of Mato Grosso, Cáceres, Brazil
| | - Adriele Athaídes Queiroz
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Brazil
| | | | - Eduardo Luzía França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Brazil
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7
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Ren BC, Zhang W, Zhang W, Ma JX, Pei F, Li BY. Melatonin attenuates aortic oxidative stress injury and apoptosis in STZ-diabetes rats by Notch1/Hes1 pathway. J Steroid Biochem Mol Biol 2021; 212:105948. [PMID: 34224859 DOI: 10.1016/j.jsbmb.2021.105948] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 12/21/2022]
Abstract
Oxidative stress injury is an important link in the pathogenesis of diabetes, and reducing oxidative stress damage caused by long-term hyperglycemia is an important diabetic treatment strategy. Melatonin has been proved to be a free radical scavenger with strong antioxidant activity, and its protective effect on diabetes and the complications has been confirmed. However, the role and potential mechanism of melatonin in oxidative stress injury of diabetic aorta have not been reported. Besides, Notch signaling pathway plays an important role in vascular growth, differentiation, and apoptosis. We speculated that melatonin could improve oxidative stress injury of diabetic aorta through Notch1/Hes1 signaling pathway. STZ-induced diabetic rats and vascular smooth muscle cells (VSMCs) cultured with high glucose were treated with or without melatonin, melatonin receptor antagonist Luzindole, γ-secretase inhibitor DAPT respectively. We found that melatonin could improve the oxidative stress injury of diabetic aorta and reduce the apoptosis of VSMCs. Interestingly, melatonin could activate Notch1 signaling pathway, play an antioxidant role, and reduce the expression of apoptosis-related proteins. However, these protective effects could be largely eliminated by Luzindole or DAPT. We concluded that the repression of Notch1 signaling pathway would inhibit the repair of oxidative stress injury in diabetes. Melatonin could ameliorate oxidative stress injury and apoptosis of diabetic aorta by activating Notch1/Hes1 signaling pathway.
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Affiliation(s)
- Bin-Cheng Ren
- Department of Rheumatology and Immunology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi`an, Shaanxi, China.
| | - Wen Zhang
- Department of Cardiovascular Surgery, Fuwai Hospital Chinese Academy of Medical Sciences, ShenZhen, China.
| | - Wei Zhang
- Department of Cardiovascular Surgery, Second Affiliated Hospital of Xi'an Jiaotong University, Xi`an, Shaanxi, China.
| | - Jian-Xing Ma
- Department of Cardiovascular Surgery, Second Affiliated Hospital of Xi'an Jiaotong University, Xi`an, Shaanxi, China.
| | - Fei Pei
- Department of Cardiovascular Surgery, Second Affiliated Hospital of Xi'an Jiaotong University, Xi`an, Shaanxi, China.
| | - Bu-Ying Li
- Department of Cardiovascular Surgery, Second Affiliated Hospital of Xi'an Jiaotong University, Xi`an, Shaanxi, China.
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8
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Wajid F, Poolacherla R, Mim FK, Bangash A, Rutkofsky IH. Therapeutic potential of melatonin as a chronobiotic and cytoprotective agent in diabetes mellitus. J Diabetes Metab Disord 2020; 19:1797-1825. [PMID: 33520862 PMCID: PMC7843808 DOI: 10.1007/s40200-020-00585-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/06/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE Diabetes mellitus is a complex metabolic disorder characterized by hyperglycemia occurring as a result of dysregulation and balance of various metabolic pathways. In recent years, circadian misalignment (due to altered sleep/wake, feeding/fasting cycles), has been intimately linked with the development of diabetes mellitus. Herein, we review our knowledge of oxidative stress, circadian rhythms control of metabolism, and the effects of its disruption on homeostasis while emphasizing the importance of melatonin, a nocturnally peaking, pineal hormone, as a potential therapeutic drug for the prevention and treatment of diabetes. METHODS PubMed database was systematically searched for related articles and data from all types of studies, including clinical trials, review articles, and case reports were considered without limiting the study to one specific category. RESULTS Experimental and epidemiological evidence indicate melatonin's multifaceted effects in intermediary metabolism via resynchronization of the circadian rhythms and its deficiency is associated with metabolic derangements. As a chronobiotic, it cures insomnia and sleep disorders caused by shift work or jet lag. The antagonistic relationship between melatonin and insulin highlights its influence in regulating insulin secretion, its action, and melatonin treatment successfully improved glucose homeostasis, energy balance, and overall health in diabetes mellitus. Melatonin's cytoprotective role as an antioxidant and free radical scavenger, proved useful in combating oxidative stress, preserving beta-cell function, and influencing the development of diabetic complications. CONCLUSION The therapeutic application of melatonin as a chronobiotic and cytoprotective agent is of promising significance in diabetes mellitus. Future investigations are encouraged to fully explore the efficacy of this ubiquitous molecule in various metabolic disorders.
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Affiliation(s)
- Fareha Wajid
- California Institute of Behavioural Neuroscience and Psychology, Fairfield, CA USA
| | - Raju Poolacherla
- California Institute of Behavioural Neuroscience and Psychology, Fairfield, CA USA
| | - Fatiha Kabir Mim
- California Institute of Behavioural Neuroscience and Psychology, Fairfield, CA USA
| | - Amna Bangash
- California Institute of Behavioural Neuroscience and Psychology, Fairfield, CA USA
| | - Ian H. Rutkofsky
- California Institute of Behavioural Neuroscience and Psychology, Fairfield, CA USA
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9
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Elsherbini AM, Ezzat SK. Effect of melatonin versus injectable platelet rich fibrin on critical wound healing in submandibular salivary glands of diabetic rats. J Oral Biol Craniofac Res 2020; 10:592-596. [PMID: 32953441 DOI: 10.1016/j.jobcr.2020.08.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/04/2020] [Accepted: 08/23/2020] [Indexed: 12/17/2022] Open
Abstract
Background Diabetes mellitus (DM) has harmful effects on body organs, including submandibular salivary glands (SMGs). It impairs wound healing process that follow sialoadenectomy. Yet there is no complete cure to diabetes, the available medications tend to control the side effects of DM or manage insulin resistance. Herein we tried to investigate the possible effects of injectable platelet rich fibrin (i-PRF) and melatonin on wound healing in diabetic rats. Material and methods Surgical defects were created in SMGs of 30 rats after confirmation of DM induction. Then rats were randomly and equally allocated into three groups. Group I served as control group; group II received topically applied i-PRF, and group III received topically administrated melatonin. After 28 days all rats were euthanized, and SMGs were processed for histological and biochemical analysis. Results Both i-PRF and melatonin caused significant reduction of malondialdehyde (P < 0.0001) and caspase-3 (P < 0.001) and significant increase in vascular endothelial growth factors (P = 0.001,0.009 respectively) that increased SMGs regenerative capacity when compared to diabetic group. Melatonin showed superior results regarding the histomorphological structure of SMGs. Conclusion Melatonin and i-PRF can be possible candidates for improvement of wound healing events in SMGs of diabetic rats.
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Affiliation(s)
- Amira M Elsherbini
- Oral Biology Department, Faculty of Dentistry, Mansoura University, Egypt
| | - Samah K Ezzat
- Oral Biology Department, Faculty of Dentistry, Mansoura University, Egypt
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10
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Rodríguez C, Puente-Moncada N, Reiter RJ, Sánchez-Sánchez AM, Herrera F, Rodríguez-Blanco J, Duarte-Olivenza C, Turos-Cabal M, Antolín I, Martín V. Regulation of cancer cell glucose metabolism is determinant for cancer cell fate after melatonin administration. J Cell Physiol 2020; 236:27-40. [PMID: 32725819 DOI: 10.1002/jcp.29886] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 06/02/2020] [Accepted: 06/06/2020] [Indexed: 12/30/2022]
Abstract
Several oncogenic pathways plus local microenvironmental conditions, such as hypoxia, converge on the regulation of cancer cells metabolism. The major metabolic alteration consists of a shift from oxidative phosphorylation as the major glucose consumer to aerobic glycolysis, although most of cancer cells utilize both pathways to a greater or lesser extent. Aerobic glycolysis, together with the directly related metabolic pathways such as the tricarboxylic acid cycle, the pentose phosphate pathway, or gluconeogenesis are currently considered as therapeutic targets in cancer research. Melatonin has been reported to present numerous antitumor effects, which result in a reduced cell growth. This is achieved with both low and high concentrations with no relevant side effects. Indeed, high concentrations of this indolamine reduce proliferation of cancer types resistant to low concentrations and induce cell death in some types of tumors. Previous work suggest that regulation of glucose metabolism and other related pathways play an important role in the antitumoral effects of high concentration of melatonin. In the present review, we analyze recent work on the regulation by such concentrations of this indolamine on aerobic glycolysis, gluconeogenesis, the tricarboxylic acid cycle and the pentose phosphate pathways of cancer cells.
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Affiliation(s)
- Carmen Rodríguez
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - Noelia Puente-Moncada
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, Texas
| | - Ana M Sánchez-Sánchez
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - Federico Herrera
- Cell Structure and Dynamics Laboratory, Institute of Chemical and Biological Technology (ITQB-NOVA), Estação Agronómica Nacional, Oeiras, Portugal
| | - Jezabel Rodríguez-Blanco
- Molecular Oncology Program, Department of Surgery, The DeWitt Daughtry Family, Miller School of Medicine, University of Miami, Miami, Florida.,Department of Pediatrics, Darby Children's Research Institute, Medical University of South Carolina, Charleston, South Carolina.,Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina
| | - Cristina Duarte-Olivenza
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - María Turos-Cabal
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - Isaac Antolín
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
| | - Vanesa Martín
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.,University Institute of Oncology of the Principality of Asturias (IUOPA), University of Oviedo, Oviedo, Spain.,Health Research Institute of the Principality of Asturias (ISPA), University of Oviedo, Oviedo, Spain
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11
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Alves ÉR, Ferreira CGM, Silva MVD, Vieira Filho LD, Silva Junior VAD, Melo IMFD, Neto CJCL, Santos LCDS, Teixeira ÁAC, Wanderley Teixeira V. Protective action of melatonin on diabetic rat testis at cellular, hormonal and immunohistochemical levels. Acta Histochem 2020; 122:151559. [PMID: 32622427 DOI: 10.1016/j.acthis.2020.151559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 05/03/2020] [Accepted: 05/03/2020] [Indexed: 12/20/2022]
Abstract
The aim of the present study was to analyze the effects of melatonin treatment on diabetic rat testes. Fifty albino rats were divided into the following groups: CG: control group; GD: placebo-induced and placebo-treated mice; GDI: insulin-induced and post-confirmation diabetes-induced rats; GDM: diabetes-induced and melatonin-treated post-confirmation mice and GDMS: diabetes-induced and melatonin-treated mice simultaneously. Melatonin was administered at a dose of 10 mg/kg in drinking water every day for 20 days at night. Diabetes was induced by streptozotocin (60 mg/kg) and confirmed after the fifth day of induction. Insulin was administered at 5 IU (international units)/day at different times of the day for 20 days. The testes were submitted to histopathological, morphometric, immunohistochemical and oxidative stress analysis. Melatonin moderately decreased glycemic levels, protected weight loss and morphometric changes in the testicles, increased antioxidant enzyme levels and stabilized plasma testosterone and androgen receptor levels and decreased inflammatory markers in the testicles. Showing its potential to mitigate diabetes effects.
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Affiliation(s)
- Érique Ricardo Alves
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil.
| | | | - Maria Vanessa da Silva
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Leucio Duarte Vieira Filho
- Federal University of Pernambuco, Department of Physiology and Pharmacology, Center for Biological Sciences, Recife Brazil
| | | | | | | | - Laís Caroline da Silva Santos
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Álvaro Aguiar Coelho Teixeira
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Valéria Wanderley Teixeira
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
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Melatonin regulates the expression of inflammatory cytokines, VEGF and apoptosis in diabetic retinopathy in rats. Chem Biol Interact 2020; 327:109183. [PMID: 32554039 DOI: 10.1016/j.cbi.2020.109183] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/23/2020] [Accepted: 06/15/2020] [Indexed: 02/06/2023]
Abstract
The present study analyzed whether melatonin could mediate the expression of VEGF, IL-6 and TNF-α, as well as the apoptotic index in rats with diabetic retinopathy. Fifty Wistar albino rats were divided into the following groups: GC: rats without induction of diabetes by streptozotocin; GD: rats induced to diabetes by streptozotocin and treated with placebo; GDM: rats induced to diabetes by streptozotocin and after confirmation treated with melatonin at a dose of 10 mg/kg for 20 days; GDMS: rats induced to diabetes by streptozotocin and treated simultaneously with melatonin at a dosage of 10 mg/kg for 20 days; GDI: rats induced to diabetes by streptozotocin and after confirmation treated with insulin for 20 days. Diabetes was induced by intraperitoneal injections of streptozotocin (60 mg/kg), and insulin (5 U/day) was administered subcutaneously. For apoptosis TUNEL was used, while for the analysis of VEGF, IL-6 and TNF-α. The results showed that the groups that were treated with melatonin decreased the expression of cytokines and VEGF, in addition to apoptosis. Thus, it is concluded that melatonin can regulate the expression of these factors by improving the condition of the retina in diabetic retinopathy.
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Melatonin Ameliorates MI-Induced Cardiac Remodeling and Apoptosis through a JNK/p53-Dependent Mechanism in Diabetes Mellitus. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:1535201. [PMID: 32411318 PMCID: PMC7199622 DOI: 10.1155/2020/1535201] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/25/2019] [Accepted: 12/16/2019] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus, a worldwide health threat, is considered an independent risk factor for cardiovascular diseases. The overall cardiovascular risk of diabetes is similar to the one having one myocardial infarction (MI) attack although the precise impact of diabetes on MI-induced myocardial anomalies remains elusive. Given that mortality following MI is much greater in diabetic patients compared to nondiabetic patients, this study was designed to examine the effect of melatonin on MI injury-induced myocardial dysfunction in diabetes. Adult mice were made diabetic using high-fat feeding and streptozotocin (100 mg/kg body weight) prior to MI and were treated with melatonin (50 mg/kg/d, p.o.) for 4 weeks prior to assessment of cardiac geometry and function. The MI procedure in diabetes displayed overt changes in cardiac geometry (chamber dilation and interstitial fibrosis) and functional anomalies (reduced fractional shortening and cardiomyocyte contractile capacity) in association with elevated c-Jun N-terminal kinase (JNK) phosphorylation and p53 level. Melatonin treatment markedly attenuated cardiac dysfunction and myocardial fibrosis in post-MI diabetic mice. Furthermore, melatonin decreased JNK phosphorylation, reduced p53 levels, and suppressed apoptosis in hearts from the post-MI diabetic group. In vitro findings revealed that melatonin effectively counteracted high-glucose/high fat-hypoxia-induced cardiomyocyte apoptosis and contractile dysfunction through a JNK-mediated mechanism, the effects of which were impaired by the JNK activator anisomycin. In summary, our study suggests that melatonin protects against myocardial injury in post-MI mice with diabetes, which offers a new therapeutic strategy for the management of MI-induced cardiac injury in diabetes.
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Kamsrijai U, Wongchitrat P, Nopparat C, Satayavivad J, Govitrapong P. Melatonin attenuates streptozotocin-induced Alzheimer-like features in hyperglycemic rats. Neurochem Int 2020; 132:104601. [DOI: 10.1016/j.neuint.2019.104601] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/17/2019] [Accepted: 11/11/2019] [Indexed: 12/15/2022]
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Khorsand M, Akmali M, Akhzari M. Efficacy of melatonin in restoring the antioxidant status in the lens of diabetic rats induced by streptozotocin. J Diabetes Metab Disord 2019; 18:543-549. [PMID: 31890680 DOI: 10.1007/s40200-019-00445-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 09/23/2019] [Indexed: 02/07/2023]
Abstract
Background Melatonin is a well-known free radical scavenger. The present study aimed to investigate the effects of melatonin treatment on the antioxidant status in the lenticular tissue of streptozotocin (STZ)-induced diabetic rats. Methods Thirty-four male rats were randomly divided into four groups as follows: healthy control rats (group 1, n = 10); diabetic control rats (group 2, n = 10); melatonin-treated (5 mg/kg·day) diabetic rats (group 3, n = 10) and melatonin-treated (5 mg/kg·day) healthy rats (group 4, n = 4). Diabetes was induced by injection of streptozotocin (50 mg/kg, ip). Following 8-weeks of melatonin treatment, all rats were killed and the blood plasma and their lenses were stored at -70 °C for antioxidant enzyme activities assay and biochemical determination. Results The plasma glucose and lens malondialdehyde (MDA) increased significantly in the rats of group 2 as compared to the group 1. Also, a significant decrease in the levels of catalase (CAT) and glutathione reductase (GR) activities in the lenses and plasma reduced glutathione (GSH) was found. However, the levels of lenticular MDA (not significant) and the plasma glucose significantly decreased in the rats of group 3 compared to the group 2. Besides, the levels of CAT, GR in the rats lens and plasma GSH increased significantly. Conclusion Diabetes mellitus induced hyperglycemia and oxidative stress, whereas melatonin decreased the blood glucose levels and lipid peroxidation and increased the activities of antioxidant enzymes in diabetic rat lenses.
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Affiliation(s)
- Marjan Khorsand
- 1Department of Biochemistry and Molecular Biology, Shahid Sadoughi University of Medical Sciences, Fars-shiraz-meshkinfam St.-paramedical school-Department of laboratory sciences, Yazd, Iran
- 2Department of Biochemistry, Shiraz University of Medical Sciences, Medical School, P.O box: 71345 1167, Shiraz, Iran
| | - Masoumeh Akmali
- 2Department of Biochemistry, Shiraz University of Medical Sciences, Medical School, P.O box: 71345 1167, Shiraz, Iran
| | - Morteza Akhzari
- 2Department of Biochemistry, Shiraz University of Medical Sciences, Medical School, P.O box: 71345 1167, Shiraz, Iran
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Espino J, Rodríguez AB, Pariente JA. Melatonin and Oxidative Stress in the Diabetic State: Clinical Implications and Potential Therapeutic Applications. Curr Med Chem 2019; 26:4178-4190. [PMID: 29637854 DOI: 10.2174/0929867325666180410094149] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 12/07/2017] [Accepted: 12/07/2017] [Indexed: 02/07/2023]
Abstract
All living organisms exhibit circadian rhythms, which govern the majority of biological functions, including metabolic processes. Misalignment of these circadian rhythms increases the risk of developing metabolic diseases. Thus, disruption of the circadian system has been proven to affect the onset of type 2 diabetes mellitus (T2DM). In this context, the pineal indoleamine melatonin is a signaling molecule able to entrain circadian rhythms. There is mounting evidence that suggests a link between disturbances in melatonin production and impaired insulin, glucose, lipid metabolism, and antioxidant capacity. Besides, several genetic association studies have causally associated various single nucleotide polymorphysms (SNPs) of the human MT2 receptor with increased risk of developing T2DM. Taken together, these data suggest that endogenous as well as exogenous melatonin may influence diabetes and associated metabolic disturbances not only by regulating insulin secretion but also by providing protection against reactive oxygen species (ROS) since pancreatic β-cells are very susceptible to oxidative stress due to their low antioxidant capacity.
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Affiliation(s)
- Javier Espino
- Department of Physiology (Neuroimmunophysiology and Chrononutrition Research Group), Faculty of Science, University of Extremadura, Badajoz, Spain
| | - Ana B Rodríguez
- Department of Physiology (Neuroimmunophysiology and Chrononutrition Research Group), Faculty of Science, University of Extremadura, Badajoz, Spain
| | - José A Pariente
- Department of Physiology (Neuroimmunophysiology and Chrononutrition Research Group), Faculty of Science, University of Extremadura, Badajoz, Spain
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The Mystery behind the Pineal Gland: Melatonin Affects the Metabolism of Cholesterol. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4531865. [PMID: 31360294 PMCID: PMC6652030 DOI: 10.1155/2019/4531865] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 05/20/2019] [Accepted: 06/23/2019] [Indexed: 12/17/2022]
Abstract
Melatonin may be considered a cardioprotective agent. Since atherogenesis is partly associated with the metabolism of lipoproteins, it seems plausible that melatonin affects cardiovascular risk by modulating the metabolism of cholesterol and its subfractions. Moreover, cholesterol-driven atherogenesis can be hypothetically reduced by melatonin, mainly due to the minimalization of harmful reactions triggered in the cardiovascular system by the reactive oxygen species-induced toxic derivatives of cholesterol. In this review, we attempted to summarize the available data on the hypolipemizing effects of melatonin, with some emphasis on the molecular mechanisms underlying these reactions. We aimed to attract readers' attention to the numerous gaps of knowledge present in the reviewed field and the essential irrelevance between the findings originating from different sources: clinical observations and in vitro mechanistic and molecular studies, as well as preclinical experiments involving animal models. Overall, such inconsistencies make it currently impossible to give a reliable opinion on the action of melatonin on the metabolism of lipoproteins.
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Motawi TK, Ahmed SA, A Hamed M, El-Maraghy SA, M Aziz W. Melatonin and/or rowatinex attenuate streptozotocin-induced diabetic renal injury in rats. J Biomed Res 2019; 33:113-121. [PMID: 29089475 PMCID: PMC6477174 DOI: 10.7555/jbr.31.20160028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The study aimed to explore the prophylactic effect of melatonin, rowatinex; a naturally occurring renal drug, and its combination on diabetic nephropathy in type 2 diabetic rats. Diabetes was induced by intraperitoneal injection of a single dose of streptozotocin (50 mg/g body weight). Three days before diabetes induction, rats were daily treated with melatonin, rowatinex and their combination continuously for 8 weeks. Evaluation was done through measuring blood urea nitrogen (BUN), serum uric acid, serum creatinine, urine creatinine, creatinine clearance, nitric oxide (NO), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione (GSH), total antioxidant capacity (TAC), kidney injury molecule-1 (KIM-1), heat shock protein-70 (HSP-70), caspase-3, transforming growth factor β1 (TGFβ1), DNA degradation by the comet assay and total protein contents. Histopathologic study was also done for the kidney and the pancreas. Drastic changes in all measured parameters of the diabetic rats were observed. Treatment with melatonin and rowatinex showed amelioration to variable degrees. In conclusion, melatonin showed the most potent effect on protecting rats from deleterious action of diabetic nephropathy followed by its combination with rowatinex.
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Affiliation(s)
- Tarek K Motawi
- Biochemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Samia A Ahmed
- Therapeutic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
| | - Manal A Hamed
- Therapeutic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
| | - Shohda A El-Maraghy
- Biochemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Wessam M Aziz
- Therapeutic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
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Kurhaluk N, Szarmach A, Zaitseva OV, Sliuta A, Kyriienko S, Winklewski PJ. Effects of melatonin on low-dose lipopolysaccharide-induced oxidative stress in mouse liver, muscle, and kidney. Can J Physiol Pharmacol 2018; 96:1153-1160. [DOI: 10.1139/cjpp-2018-0011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Natalia Kurhaluk
- Department of Zoology and Animal Physiology, Faculty of Mathematics and Natural Sciences, Pomeranian University of Słupsk, Słupsk, Poland
| | - Arkadiusz Szarmach
- 2nd Department of Radiology, Faculty of Health Sciences, Medical University of Gdansk, Gdansk, Poland
| | - Olga V. Zaitseva
- Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Alina Sliuta
- Department of Ecology and Nature Protection, National State University of Chernihiv, Chernihiv, Ukraine
| | - Svitlana Kyriienko
- Department of Ecology and Nature Protection, National State University of Chernihiv, Chernihiv, Ukraine
| | - Pawel J. Winklewski
- Department of Human Physiology, Faculty of Health Sciences, Medical University of Gdansk, Gdansk, Poland
- Department of Clinical Anatomy and Physiology, Faculty of Health Sciences, Pomeranian University of Słupsk, Słupsk, Poland
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Gurel-Gokmen B, Ipekci H, Oktay S, Alev B, Ustundag UV, Ak E, Akakın D, Sener G, Emekli-Alturfan E, Yarat A, Tunali-Akbay T. Melatonin improves hyperglycemia induced damages in rat brain. Diabetes Metab Res Rev 2018; 34:e3060. [PMID: 30098300 DOI: 10.1002/dmrr.3060] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 06/14/2018] [Accepted: 07/30/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Diabetes mellitus is an endocrine disorder which is characterized by the development of resistance to the cellular activity of insulin or inadequate insulin production. It leads to hyperglycemia, prolonged inflammation, and oxidative stress. Oxidative stress is assumed to play an important role in the development of diabetic complications. Melatonin is the hormone that interacts with insulin in diabetes. Therefore, in this study, the effects of melatonin treatment with or without insulin were examined in diabetic rat brain. METHODS Rats were divided into five groups as control, diabetes, diabetes + insulin, diabetes + melatonin, and diabetes + melatonin + insulin. Experimental diabetes was induced by streptozotocin (60 mg/kg, i.p.). Twelve weeks after diabetes induction, rats were decapitated. Malondialdehyde, glutathione, sialic acid and nitric oxide levels, superoxide dismutase, catalase, glutathione-S-transferase, myeloperoxidase, and tissue factor activities were determined in brain tissue. RESULTS Melatonin alone showed its antioxidant effect by increasing brain glutathione level, superoxide dismutase, catalase, and glutathione-S-transferase activities and decreasing malondialdehyde level in experimental diabetes. Although insulin did not have a significant effect on glutathione and glutathione-S-transferase, its effects on lipid peroxidation, superoxide dismutase, and catalase were similar to melatonin; insulin also decreased myolopeoxidase activity and increased tissue factor activity. Combined melatonin and insulin treatment mimicked the effects of insulin. CONCLUSION Addition of melatonin to the insulin treatment did not change the effects of insulin, but the detailed role of melatonin alone in the treatment of diabetes merits further experimental and clinical investigation.
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Affiliation(s)
- Begum Gurel-Gokmen
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Hazal Ipekci
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Sehkar Oktay
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Burcın Alev
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Unsal Velı Ustundag
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Esın Ak
- Basic Medical Sciences, Histology and Embryology, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Dılek Akakın
- Basic Medical Sciences, Histology and Embryology, Marmara University, Faculty of Medicine, Istanbul, Turkey
| | - Goksel Sener
- Pharmacology, Marmara University, Faculty of Pharmacy, Istanbul, Turkey
| | - Ebru Emekli-Alturfan
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Aysen Yarat
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
| | - Tugba Tunali-Akbay
- Basic Medical Sciences, Biochemistry, Marmara University, Faculty of Dentistry, Istanbul, Turkey
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Saad RA, EL-Bab MF, Shalaby AA. Attenuation of acute and chronic liver injury by melatonin in rats. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2013.04.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ramadan A. Saad
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mohamed Fath EL-Bab
- Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
- Department of Physiology, College of Medicine, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Abir A. Shalaby
- Department of Biochemistry, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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Pereira QLC, Hara CDCP, Fernandes RTS, Fagundes DLG, França-Botelho ADC, Gomes MA, França EL, Honorio-França AC. Human colostrum action against Giardia lamblia infection influenced by hormones and advanced maternal age. Parasitol Res 2018; 117:1783-1791. [PMID: 29656328 DOI: 10.1007/s00436-018-5860-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 04/04/2018] [Indexed: 11/24/2022]
Abstract
Children are more susceptible to Giardia lamblia infection. Cells and hormones contained in human colostrum have an immunoprotective action against giardiasis, but the effects of advanced maternal age on these components are poorly understood. This study analyzed the colostrum of older women to determine melatonin and cortisol levels besides the participation of these hormones on the functional activity of phagocytes against G. lamblia. Colostrum samples were collected from younger (18 to 35 years old) and older (over 36 years old) lactating women. Colostrum samples were subjected to melatonin and cortisol determination, immunophenotyping, quantification of superoxide release, and assessment of phagocytic rate and microbicidal activity of phagocytes treated with hormones and in the presence of G. lamblia. Colostrum from mothers of advanced age contained higher melatonin and cortisol levels and a lower rate of cells expressing CD14+ and CD15+. In the colostru of these older mothers, melatonin increased superoxide release by phagocytes. In both groups, superoxide release by phagocytes treated with cortisol was higher in the presence of G. lamblia. In colostrum from mothers of advanced age, mononuclear (MN) phagocytes treated with melatonin showed higher phagocytosis of G. lamblia and higher microbicidal index. In younger mothers, MN and polymorphonuclear (PMN) colostrum phagocytes exhibited higher rates of G. lamblia elimination when treated with both melatonin and cortisol. In older mothers, cortisol and melatonin regulation for the functional activity of colostrum phagocytes against G. lamblia may represent an additional defense mechanism, relevant for the protection and treatment of parasitic infections in breastfed children.
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Affiliation(s)
- Queli Lisiane Castro Pereira
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil.,Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Danny Laura Gomes Fagundes
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil
| | | | - Maria Aparecida Gomes
- Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Eduardo Luzía França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, MT, Brazil
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Effects of Melatonin on Glucose Homeostasis, Antioxidant Ability, and Adipokine Secretion in ICR Mice with NA/STZ-Induced Hyperglycemia. Nutrients 2017; 9:nu9111187. [PMID: 29109369 PMCID: PMC5707659 DOI: 10.3390/nu9111187] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/04/2017] [Accepted: 10/26/2017] [Indexed: 01/04/2023] Open
Abstract
Diabetes is often associated with decreased melatonin level. The aim was to investigate the effects of different dosage of melatonin on glucose hemostasis, antioxidant ability and adipokines secretion in diabetic institute for cancer research (ICR) mice. Forty animals were randomly divided into five groups including control (C), diabetic (D), low-dosage (L), medium-dosage (M), and high-dosage (H) groups. Groups L, M, and H, respectively, received oral melatonin at 10, 20, and 50 mg/kg of BW (body weight) daily after inducing hyperglycemia by nicotinamide (NA)/ streptozotocin (STZ). After the six-week intervention, results showed that melatonin administration increased insulin level and performed lower area under the curve (AUC) in H group (p < 0.05). Melatonin could lower hepatic Malondialdehyde (MDA) level in all melatonin-treated groups and increase superoxide dismutase activity in H group (p < 0.05). Melatonin-treated groups revealed significant higher adiponectin in L group, and lower leptin/adiponectin ratio and leptin in M and H groups (p < 0.05). Melatonin could lower cholesterol and triglyceride in liver and decrease plasma cholesterol and low-density lipoprotein-cholesterol (LDL-C) in L group, and increase plasma high-density lipoprotein-cholesterol (HDL-C) in H group (p < 0.05). Above all, melatonin could decrease oxidative stress, increase the adiponectin level and improve dyslipidemia, especially in H group. These data support melatonin possibly being a helpful aid for treating hyperglycemia-related symptoms.
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Kurhaluk N, Sliuta A, Kyriienko S, Winklewski PJ. Melatonin Restores White Blood Cell Count, Diminishes Glycated Haemoglobin Level and Prevents Liver, Kidney and Muscle Oxidative Stress in Mice Exposed to Acute Ethanol Intoxication. Alcohol Alcohol 2017; 52:521-528. [DOI: 10.1093/alcalc/agx045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 07/03/2017] [Indexed: 12/13/2022] Open
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Melatonin and Metformin Diminish Oxidative Stress in Heart Tissue in a Rat Model of High Fat Diet and Mammary Carcinogenesis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1047:7-19. [PMID: 29151256 DOI: 10.1007/5584_2017_128] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The aim of this study was to determine the effects of long-term administration of the oral antidiabetic metformin or the pineal hormone melatonin, and a combination thereof, in preventing oxidative stress in the heart tissue of female Sprague-Dawley rats with mammary tumors induced by N-methyl-N-nitrosourea (NMU) (50 mg/kg) given on the 42nd postnatal day. Metformin and melatonin were administered 12 days before and 16 weeks after the carcinogen. During the experiment, all animals were fed a high fat diet (10% total fat, 2.5% from lard, and 7.5% from palm oil). The findings are that mammary carcinogenesis generated oxidative stress. Reactive oxygen species (ROS) content, estimated from thiobarbituric acid reactive substances (TBARS), oxidatively modified protein content (aldehyde and ketone derivatives), and the activity of the antioxidant enzymes superoxide dismutase, glutathione reductase, and glutathione peroxidase were all augmented. Metformin caused a decrease in oxidative stress in the heart, accompanied by a decrease in diene conjugates, the elimination of ROS (stable total antioxidant status), and the activation of catalase and glutathione reductase. Melatonin caused an increase in total antioxidant status and a substantial reduction in ROS as estimated from aldehyde and ketone derivatives, lipid peroxidation at the initial (diene conjugates) and terminal stages (TBARS), and increased catalase and glutathione peroxidase activities. Metformin and melatonin combined reversed the effects of NMU on oxidative stress. In conclusion, melatonin reduces the level of oxidative stress in the heart tissue, caused by NMU carcinogenesis and a high fat diet, significantly stronger than metformin.
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Yildirimturk S, Batu S, Alatli C, Olgac V, Firat D, Sirin Y. The effects of supplemental melatonin administration on the healing of bone defects in streptozotocin-induced diabetic rats. J Appl Oral Sci 2016; 24:239-49. [PMID: 27383705 PMCID: PMC5022211 DOI: 10.1590/1678-775720150570] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 03/15/2016] [Indexed: 12/31/2022] Open
Abstract
Diabetes mellitus (DM) causes an increased production of free radicals that can impair bone healing. Melatonin is a hormone secreted mainly by the pineal gland, which participates in the neutralization process of free radicals.
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Affiliation(s)
- Senem Yildirimturk
- - Istanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey
| | - Sule Batu
- - Istanbul University, Faculty of Dentistry, Department of Biochemistry, Istanbul, Turkey
| | - Canan Alatli
- - Istanbul University, Institute of Oncology, Department of Pathology, Istanbul, Turkey
| | - Vakur Olgac
- - Istanbul University, Institute of Oncology, Department of Pathology, Istanbul, Turkey
| | - Deniz Firat
- - Istanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey
| | - Yigit Sirin
- - Istanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey
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Sadar S, Kaspate D, Vyawahare N. Protective effect of L-glutamine against diabetes-induced nephropathy in experimental animal: Role of KIM-1, NGAL, TGF-β1, and collagen-1. Ren Fail 2016; 38:1483-1495. [PMID: 27756197 DOI: 10.1080/0886022x.2016.1227918] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Diabetic nephropathy is a serious microvascular complication and one of the main causes of end-stage renal disease. L-Glutamine (LG) is naturally occurring amino acids with antidiabetic and antioxidant potential. The aim of present investigation was to evaluate the potential of LG against streptozotocin (STZ)-induced diabetic nephropathy (DN) in laboratory rats. DN was induced in male Wistar rats (200-220 g) by intraperitoneal administration of STZ (55 mg/kg). Animals were treated orally with either distilled water (10 mg/kg) or LG (250, 500, and 1000 mg/kg) or Sitagliptin (5 mg/kg). Various biochemical, molecular, and histological (hematoxylin-eosin and Masson's trichrome stain) parameters were assessed. Administration of LG (500 and 1000 mg/kg) significantly inhibited (p < .05) STZ-induced alterations in serum and urine biochemistry (urine creatinine, uric acid, albumin, and BUN). It also significantly increased creatinine clearance rate. STZ induced increase in renal oxidonitrosative stress was significantly decreased (p < .05) by LG (500 and 1000 mg/kg) treatment. Upregulated renal KIM-1, NGAL, TGF-β1, and collagen-1 mRNA expression after STZ administration was significantly inhibited (p < .05) by LG (500 and 1000 mg/kg) treatment. Correlation analysis also revealed that antidiabetic potential of LG attenuates STZ-induced elevated renal KIM-1, NGAL, TGF-β1, and collagen-1 mRNA expression. Histopathological alteration induced by STZ in renal tissue was ameliorated by LG treatment. In conclusion, results of present investigation suggest that treatment with LG ameliorated STZ-induced DN via the inhibition of oxidonitrosative stress as well as downregulation of KIM-1, NGAL, TGF-β1, and collagen-1 mRNA expressions.
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Affiliation(s)
- Smeeta Sadar
- a Padmashree Dr D. Y. Patil College of Pharmacy , Akurdi , Pune , Maharashtra , India
| | - Dipti Kaspate
- b Cognizant Technology Solution , Hinjewadi, Pune , Maharashtra , India
| | - Neeraj Vyawahare
- a Padmashree Dr D. Y. Patil College of Pharmacy , Akurdi , Pune , Maharashtra , India
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da Costa CFP, Gobbo MG, Taboga SR, Pinto-Fochi ME, Góes RM. Melatonin intake since weaning ameliorates steroidogenic function and sperm motility of streptozotocin-induced diabetic rats. Andrology 2016; 4:526-41. [PMID: 27037637 DOI: 10.1111/andr.12158] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 12/14/2022]
Abstract
Melatonin may be used as an antioxidant in therapy against systemic sequelae caused by oxidative stress in diabetes. However, as melatonin has a major role in regulating reproductive activity, its consequence on reproductive parameters under diabetes needs to be better clarified. We have studied whether prior and concomitant treatment of juvenile Wistar rats with low doses of melatonin interferes in reproductive damage induced by experimental diabetes after 1 and 8 weeks. The consequences of melatonin administration since weaning on reproductive parameters of healthy rats at adulthood were also evaluated. Melatonin was provided in drinking water (10 μg/kg b.w./day) after weaning (5-week-old). Diabetes was induced by streptozotocin injection (4.5 mg/100 g b.w.) at 13-week-old rats, and rats were euthanized 1 and 8 weeks after disease onset. Diabetes decreased circulating testosterone levels (~35% to 1 week; ~62% to 2 months; p < 0.01) but did not affect testes sperm counts. Two months of diabetes reduced the sperm reserve and led to atrophy of epididymal cauda. Both 1-week and 2-month diabetes impaired sperm motility, decreased the number of spermatozoa with progressive movement, and increased the number of immotile sperm. Melatonin intake reduced serum testosterone levels ~29% in healthy 14-week-old and ~23% in 21-week-old rats and reduced daily testicular sperm production ~26% in the latter disease stage, but did not interfere in sperm reserves and transit time for both experimental periods. Exogenous melatonin prevented the serum testosterone decrease and damage to sperm motility in diabetic rats and attenuated reduction in sperm counts and transit time induced by 1-week diabetes but did not avoid this decrease at 2-month diabetes. Low doses of melatonin administered prior to and during experimental diabetes attenuated damage to testicular steroidogenic activity and preserved sperm motility, but not sperm reserves in the rat. Our data indicated a differential action of melatonin in normoglycemic and hyperglycemic conditions, particularly in sperm motility and testosterone production by Leydig cells.
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Affiliation(s)
- C F P da Costa
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, São José do Rio Preto, SP, Brazil.,Department of Biology, Institute of Biosciences, Letters and Exact Sciences, Univ Estadual Paulista (IBILCE/UNESP), São José do Rio Preto, SP, Brazil
| | - M G Gobbo
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, São José do Rio Preto, SP, Brazil.,Department of Biology, Institute of Biosciences, Letters and Exact Sciences, Univ Estadual Paulista (IBILCE/UNESP), São José do Rio Preto, SP, Brazil
| | - S R Taboga
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, São José do Rio Preto, SP, Brazil.,Department of Biology, Institute of Biosciences, Letters and Exact Sciences, Univ Estadual Paulista (IBILCE/UNESP), São José do Rio Preto, SP, Brazil
| | - M E Pinto-Fochi
- Department of Biology, Institute of Biosciences, Letters and Exact Sciences, Univ Estadual Paulista (IBILCE/UNESP), São José do Rio Preto, SP, Brazil
| | - R M Góes
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, São José do Rio Preto, SP, Brazil.,Department of Biology, Institute of Biosciences, Letters and Exact Sciences, Univ Estadual Paulista (IBILCE/UNESP), São José do Rio Preto, SP, Brazil
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Gobbo MG, Dizeyi N, Abrahamsson PA, Bertilsson PA, Masitéli VS, Pytlowanciv EZ, Taboga SR, Góes RM. Influence of Melatonin on the Proliferative and Apoptotic Responses of the Prostate under Normal and Hyperglycemic Conditions. J Diabetes Res 2015; 2015:538529. [PMID: 26295055 PMCID: PMC4534615 DOI: 10.1155/2015/538529] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 06/22/2015] [Accepted: 06/24/2015] [Indexed: 01/23/2023] Open
Abstract
The antitumor properties of melatonin (MLT) are known for prostate cancer cells. This study investigated whether MLT affects prostate maturation and interferes with tissue injuries induced by diabetes. MLT was administered to Wistar rats from 5 weeks of age in the drinking water (10 μg/kg b.w.), and diabetes was induced at the 13th week by streptozotocin (4.5 mg/100g b.w., i.p.). The animals were euthanized in the 14th and 21st weeks. MLT reduced the immunostained cells for androgen receptor (AR) by 10% in younger rats. Diabetes decreased cell proliferation and increased apoptosis. MLT treatment impeded apoptosis (p = 0.02) and augmented proliferation (p = 0.0008) and PCNA content in prostate following long-term diabetes due to restoration of testosterone levels and expression of melatonin receptor type 1B. The effect of MLT (500 µM, 5 mM, and 10 mM) on androgen-dependent (22Rv1) and androgen-independent (PC3) cancer cells and human prostate epithelial cells (PNTA1) under normal and hyperglycemic conditions (HG, 450 mg/dL) was analyzed. Contrary to PNTA1 and 22Rv1 cells, MLT improved the proliferation of PC3 cells in hyperglycemic medium. The combined data indicated that MLT had proliferative and antiapoptotic effects in prostate cells subjected to HG levels and it seems to involve specific MLT pathways rather than AR.
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Affiliation(s)
- Marina G. Gobbo
- Department of Cell Biology, Institute of Biology, UNICAMP, Avenue Bertrand Russel, 6109 Campinas, SP, Brazil
| | - Nishtman Dizeyi
- Department of Clinical Sciences, Division of Urological Research, Skåne University Hospital, Lund University, 205 02 Malmö, Sweden
| | - Per-Anders Abrahamsson
- Department of Clinical Sciences, Division of Urological Research, Skåne University Hospital, Lund University, 205 02 Malmö, Sweden
| | - Per-Anders Bertilsson
- Department of Clinical Sciences, Division of Urological Research, Skåne University Hospital, Lund University, 205 02 Malmö, Sweden
| | - Viviane Sanches Masitéli
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, UNESP, São José do Rio Preto, SP, Brazil
| | - Eloisa Zanin Pytlowanciv
- Department of Cell Biology, Institute of Biology, UNICAMP, Avenue Bertrand Russel, 6109 Campinas, SP, Brazil
| | - Sebastião R. Taboga
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, UNESP, São José do Rio Preto, SP, Brazil
| | - Rejane M. Góes
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, UNESP, São José do Rio Preto, SP, Brazil
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Jiang B, Le L, Wan W, Zhai W, Hu K, Xu L, Xiao P. The Flower Tea Coreopsis tinctoria Increases Insulin Sensitivity and Regulates Hepatic Metabolism in Rats Fed a High-Fat Diet. Endocrinology 2015; 156:2006-18. [PMID: 25774555 DOI: 10.1210/en.2015-1015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An infusion of Coreopsis tinctoria (CT) flowering tops is traditionally used in Portugal to control hyperglycemia; however, the effects of CT protection against high-fat diet (HFD)-induced hepatic insulin resistance have not been systematically studied and the precise mechanism of action is not clear. The metabolomic profiles of insulin-resistant rats fed a HFD and a CT-supplemented diet (HFD supplemented with CT drinking) for 8 weeks were investigated. Serum samples for clinical biochemistry and liver samples for histopathology and liquid chromatography-mass spectrometry-based metabolomic research were collected. Western blot and quantitative real-time PCR analyses were further used to measure the expression of several relevant enzymes together with perturbed metabolic pathways. Using analysis software, the CT treatment was found to significantly ameliorate the disturbance in 10 metabolic pathways. Combined metabolomic, Western blot, and quantitative real-time PCR analyses revealed that CT treatment significantly improved the glucose homeostasis by, on the one hand, through inhibiting the expression of gluconeogenic pathway key proteins glucose-6-phosphatase and phosphoenolpyruvate carboxykinase and, on the other hand, via regulating the mRNA or protein levels of the Krebs cycle critical enzymes (citrate synthase, succinate dehydrogenase complex, subunit A, flavoprotein, and dihydrolipoamide S-succinyltransferase). These results provide metabolic evidence of the complex pathogenic mechanism involved in hepatic insulin resistance and that the supplementation with CT improves insulin resistance at a global scale. Liquid chromatography-mass spectrometry-based metabolomics approaches are helpful to further understand diabetes-related mechanisms.
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Affiliation(s)
- Baoping Jiang
- Institute of Medicinal Plant Development (B.J., L.L., W.W., W.Z., K.H., L.X., P.X.), Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100194, China; and Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (B.J., W.W., L.X., P.X.), Ministry of Education, Beijing 100194, China
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Effect of Melatonin Intake on Oxidative Stress Biomarkers in Male Reproductive Organs of Rats under Experimental Diabetes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:614579. [PMID: 26064423 PMCID: PMC4438187 DOI: 10.1155/2015/614579] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 04/11/2015] [Accepted: 04/17/2015] [Indexed: 01/01/2023]
Abstract
This study investigated the antioxidant system response of male reproductive organs during early and late phases of diabetes and the influence of melatonin treatment. Melatonin was administered to five-week-old Wistar rats throughout the experiment, in drinking water (10 μg/kg b.w). Diabetes was induced at 13 weeks of age by streptozotocin (4.5 mg/100 g b.w., i.p.) and animals were euthanized with 14 or 21 weeks old. Activities of catalase (CAT), glutathione-S-transferase (GST), glutathione peroxidase (GPx), and lipid peroxidation were evaluated in prostate, testis, and epididymis. The enzymes activities and lipid peroxidation were not affected in testis and epididymis after one or eight weeks of diabetes. Prostate exhibited a 3-fold increase in GPx activity at short-term diabetes and at long-term diabetes there were 2- and 3-fold increase in CAT and GST, respectively (p ≤ 0.01). Melatonin treatment to healthy rats caused a 47% increase in epididymal GPx activity in 14-week-old rats. In prostate, melatonin administration normalized GST activity at both ages and mitigated GPx at short-term and CAT at long-term diabetes. The testis and epididymis were less affected by diabetes than prostate. Furthermore, melatonin normalized the enzymatic disorders in prostate demonstrating its effective antioxidant role, even at low dosages.
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Ayeleso A, Brooks N, Oguntibeju O. Modulation of antioxidant status in streptozotocin-induced diabetic male Wistar rats following intake of red palm oil and/or rooibos. ASIAN PAC J TROP MED 2015; 7:536-44. [PMID: 25063283 DOI: 10.1016/s1995-7645(14)60090-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 04/15/2014] [Accepted: 06/15/2014] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE To investigate the role of red palm oil (RPO), rooibos tea extract (RTE) and their combined treatment (RPO + RTE) on antioxidant status in streptozotocin (STZ)-induced diabetic rats. METHODS Diabetes mellitus was induced by a single administration of streptozotocin (50 mg/kg) and the rats were treated for 7 weeks. Antioxidant enzymes [catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD)], antioxidant capacity [trolox equivalence antioxidant capacity (TEAC), oxygen radical absorbance capacity (ORAC)] as well as total protein, albumin, globulin, total glutathione, conjugated diene and thiobarbituric acid reactive substances (TBARS) were investigated. RESULTS Treatment with RPO, RTE and RPO + RTE significantly (p>0.05) improved liver SOD and plasma ORAC in the diabetic rats. Similarly, diabetic rats treated with RTE and RPO + RTE enhanced liver GPx. A significant (P<0.05) increase in the plasma TBARS in the diabetic control group was observed when compared with the normal control group. Treatment of diabetic rats with RTE and RPO + RTE reduced plasma TBARS to a level not significantly different at P<0.05 from the normal control group. CONCLUSIONS The results revealed the anti-oxidative potentials of red palm oil, rooibos and their combination in diabetic conditions and hence, they could be useful in the management of diabetes and its complications.
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Affiliation(s)
- Ademola Ayeleso
- Oxidative Stress Research Centre, Department of Biomedical Sciences, Faculty of Health & Wellness Sciences, Cape Peninsula University of Technology, Bellville South Africa.
| | - Nicole Brooks
- Department of Wellness Sciences, Faculty of Health & Wellness Sciences, Cape Peninsula University of Technology, Cape Town, South Africa
| | - Oluwafemi Oguntibeju
- Oxidative Stress Research Centre, Department of Biomedical Sciences, Faculty of Health & Wellness Sciences, Cape Peninsula University of Technology, Bellville South Africa
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Navarro-Alarcón M, Ruiz-Ojeda FJ, Blanca-Herrera RM, A-Serrano MM, Acuña-Castroviejo D, Fernández-Vázquez G, Agil A. Melatonin and metabolic regulation: a review. Food Funct 2014; 5:2806-32. [DOI: 10.1039/c4fo00317a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Asokkumar K, Sen S, Umamaheswari M, Sivashanmugam A, Subhadradevi V. Synergistic effect of the combination of gallic acid and famotidine in protection of rat gastric mucosa. Pharmacol Rep 2014; 66:594-9. [PMID: 24948059 DOI: 10.1016/j.pharep.2014.01.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Revised: 01/06/2014] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
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Allagui M, Feriani A, Saoudi M, Badraoui R, Bouoni Z, Nciri R, Murat J, Elfeki A. Effects of melatonin on aluminium-induced neurobehavioral and neurochemical changes in aging rats. Food Chem Toxicol 2014; 70:84-93. [DOI: 10.1016/j.fct.2014.03.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 03/22/2014] [Accepted: 03/28/2014] [Indexed: 12/19/2022]
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Szabadfi K, Pinter E, Reglodi D, Gabriel R. Neuropeptides, trophic factors, and other substances providing morphofunctional and metabolic protection in experimental models of diabetic retinopathy. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2014; 311:1-121. [PMID: 24952915 DOI: 10.1016/b978-0-12-800179-0.00001-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Vision is the most important sensory modality for many species, including humans. Damage to the retina results in vision loss or even blindness. One of the most serious complications of diabetes, a disease that has seen a worldwide increase in prevalence, is diabetic retinopathy. This condition stems from consequences of pathological metabolism and develops in 75% of patients with type 1 and 50% with type 2 diabetes. The development of novel protective drugs is essential. In this review we provide a description of the disease and conclude that type 1 diabetes and type 2 diabetes lead to the same retinopathy. We evaluate existing experimental models and recent developments in finding effective compounds against this disorder. In our opinion, the best models are the long-term streptozotocin-induced diabetes and Otsuka Long-Evans Tokushima Fatty and spontaneously diabetic Torii rats, while the most promising substances are topically administered somatostatin and pigment epithelium-derived factor analogs, antivasculogenic substances, and systemic antioxidants. Future drug development should focus on these.
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Affiliation(s)
- Krisztina Szabadfi
- Department of Experimental Zoology and Neurobiology, University of Pecs, Pecs, Hungary; Janos Szentagothai Research Center, University of Pecs, Pecs, Hungary.
| | - Erika Pinter
- Janos Szentagothai Research Center, University of Pecs, Pecs, Hungary; Department of Pharmacology and Pharmacotherapy, University of Pecs, Pecs, Hungary
| | - Dora Reglodi
- Department of Anatomy, PTE MTA Lendulet-PACAP Research Team, University of Pecs, Pecs, Hungary
| | - Robert Gabriel
- Department of Experimental Zoology and Neurobiology, University of Pecs, Pecs, Hungary; Janos Szentagothai Research Center, University of Pecs, Pecs, Hungary
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Ali Hussei S, . O, Abd El-Ham M, M. Sabry F A. Protective Effects of Alpha-lipoic Acid and Melatonin Against Cadmium-induced Oxidative Stress in Erythrocytes of Rats. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/jpt.2014.1.24] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Gao HY, Huang J, Wang HY, Du XW, Cheng SM, Han Y, Wang LF, Li GY, Wang JH. Protective effect of Zhuyeqing liquor, a Chinese traditional health liquor, on acute alcohol-induced liver injury in mice. JOURNAL OF INFLAMMATION-LONDON 2013; 10:30. [PMID: 24090365 PMCID: PMC3851207 DOI: 10.1186/1476-9255-10-30] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 09/26/2013] [Indexed: 12/12/2022]
Abstract
The study first evaluated the hepatoprotective effect of Zhuyeqing Liquor (ZYQL) against acute alcohol-induced liver injury in mice. Animals were administered orally with 50% alcohol 12 ml/kg at 4 h after the doses of ZYQL everyday for fourteen consecutive days except mice in normal group. The protective effect was evaluated by biochemical parameters including serum aspartate transaminase (AST), alanine transferase (ALT), total-bilirubin (TBIL) and reduced glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD) in liver tissue. The result were confirmed histopathologically and the expression of TNF-α in mice liver was determined by immunohistochemistry analysis. HPLC-PDA was used for phytochemical analysis of ZYQL, and the plant source of each compound was claritied by UPLC-TOF-MS. The result showed that pretreatment with ZYQL exhibited a significant protective effect by reversing the biochemical parameters and histopathological changes in a dose depended manner. HPLC analysis indicated that ZYQL contained flavonoids, iridoids, terpenoids and phenolic acids, which might be the active chemicals. This study demonstrated the hepatoprotective activity of ZYQL, thus scientifically supported the function of its health care.
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Affiliation(s)
- Hong-Ying Gao
- School of Traditional Chinese Materia Medica 49#, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, P, R, China.
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Human colostrum melatonin exhibits a day-night variation and modulates the activity of colostral phagocytes. J Appl Biomed 2013. [DOI: 10.2478/v10136-012-0039-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Salido EM, Bordone M, De Laurentiis A, Chianelli M, Keller Sarmiento MI, Dorfman D, Rosenstein RE. Therapeutic efficacy of melatonin in reducing retinal damage in an experimental model of early type 2 diabetes in rats. J Pineal Res 2013; 54:179-89. [PMID: 22946773 DOI: 10.1111/jpi.12008] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 08/10/2012] [Indexed: 12/24/2022]
Abstract
Diabetic retinopathy (DR) is a leading cause of acquired blindness in adults, mostly affected by type 2 diabetes mellitus (T2DM). We have developed an experimental model of early T2DM in adult rats which mimics some features of human T2DM at its initial stages and provokes significant retinal alterations. The aim of this work was to analyze the effect of melatonin on retinal changes induced by the moderate metabolic derangement. For this purpose, adult male Wistar rats received a control diet or 30% sucrose in the drinking water. Three weeks after this treatment, animals were injected with vehicle or streptozotocin (STZ, 25 mg/kg). One day or 3 wk after vehicle or STZ injection, animals were subcutaneously implanted with a pellet of melatonin. Fasting and postprandial glycemia, and glucose, and insulin tolerance tests were analyzed. At 12 wk of treatment, animals which received a sucrose-enriched diet and STZ showed significant differences in metabolic tests, as compared with control groups. Melatonin, which did not affect glucose metabolism in control or diabetic rats, prevented the decrease in the electroretinogram a-wave, b-wave, and oscillatory potential amplitude, and the increase in retinal lipid peroxidation, NOS activity, TNFα, Müller cells glial fibrillary acidic protein, and vascular endothelial growth factor levels. In addition, melatonin prevented the decrease in retinal catalase activity. These results indicate that melatonin protected the retina from the alterations observed in an experimental model of DR associated with type 2 diabetes.
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Affiliation(s)
- Ezequiel M Salido
- Laboratory of Retinal Neurochemistry and Experimental Ophthalmology, Department of Human Biochemistry, School of Medicine/CEFyBO, University of Buenos Aires/CONICET, Buenos Aires, Argentina
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Tan DX, Manchester LC, Liu X, Rosales-Corral SA, Acuna-Castroviejo D, Reiter RJ. Mitochondria and chloroplasts as the original sites of melatonin synthesis: a hypothesis related to melatonin's primary function and evolution in eukaryotes. J Pineal Res 2013; 54:127-38. [PMID: 23137057 DOI: 10.1111/jpi.12026] [Citation(s) in RCA: 355] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 10/01/2012] [Indexed: 12/17/2022]
Abstract
Mitochondria and chloroplasts are major sources of free radical generation in living organisms. Because of this, these organelles require strong protection from free radicals and associated oxidative stress. Melatonin is a potent free radical scavenger and antioxidant. It meets the criteria as a mitochondrial and chloroplast antioxidant. Evidence has emerged to show that both mitochondria and chloroplasts may have the capacity to synthesize and metabolize melatonin. The activity of arylalkylamine N-acetyltransferase (AANAT), the reported rate-limiting enzyme in melatonin synthesis, has been identified in mitochondria, and high levels of melatonin have also been found in this organelle. From an evolutionary point of view, the precursor of mitochondria probably is the purple nonsulfur bacterium, particularly, Rhodospirillum rubrum, and chloroplasts are probably the descendents of cyanobacteria. These bacterial species were endosymbionts of host proto-eukaryotes and gradually transformed into cellular organelles, that is, mitochondria and chloroplasts, respectively, thereby giving rise to eukaryotic cells. Of special importance, both purple nonsulfur bacteria (R. rubrum) and cyanobacteria synthesize melatonin. The enzyme activities required for melatonin synthesis have also been detected in these primitive species. It is our hypothesis that mitochondria and chloroplasts are the original sites of melatonin synthesis in the early stage of endosymbiotic organisms; this synthetic capacity was carried into host eukaryotes by the above-mentioned bacteria. Moreover, their melatonin biosynthetic capacities have been preserved during evolution. In most, if not in all cells, mitochondria and chloroplasts may continue to be the primary sites of melatonin generation. Melatonin production in other cellular compartments may have derived from mitochondria and chloroplasts. On the basis of this hypothesis, it is also possible to explain why plants typically have higher melatonin levels than do animals. In plants, both chloroplasts and mitochondria likely synthesize melatonin, while animal cells contain only mitochondria. The high levels of melatonin produced by mitochondria and chloroplasts are used to protect these important cellular organelles against oxidative stress and preserve their physiological functions. The superior beneficial effects of melatonin in both mitochondria and chloroplasts have been frequently reported.
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Affiliation(s)
- Dun-Xian Tan
- Department of Cellular and Structural Biology, The University of Texas, Health Science Center, San Antonio, TX 78229, USA.
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Morceli G, Honorio-França AC, Fagundes DLG, Calderon IMP, França EL. Antioxidant effect of melatonin on the functional activity of colostral phagocytes in diabetic women. PLoS One 2013; 8:e56915. [PMID: 23437270 PMCID: PMC3577679 DOI: 10.1371/journal.pone.0056915] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 01/16/2013] [Indexed: 01/24/2023] Open
Abstract
Melatonin is involved in a number of physiological and oxidative processes, including functional regulation in human milk. The present study investigated the mechanisms of action of melatonin and its effects on the functional activity of colostral phagocytes in diabetic women. Colostrum samples were collected from normoglycemic (N = 38) and diabetic (N = 38) women. We determined melatonin concentration, superoxide release, bactericidal activity and intracellular Ca(2+) release by colostral phagocytes treated or not with 8-(Diethylamino) octyl-3,4,5-trimethoxybenzoate hydrochloride (TMB-8) and incubated with melatonin and its precursor (N-acetyl-serotonin-NAS), antagonist (luzindole) and agonist (chloromelatonin-CMLT). Melatonin concentration was higher in colostrum samples from hyperglycemic than normoglycemic mothers. Melatonin stimulated superoxide release by colostral phagocytes from normoglycemic but not hyperglycemic women. NAS increased superoxide, irrespective of glycemic status, whereas CMTL increased superoxide only in cells from the normoglycemic group. Phagocytic activity in colostrum increased significantly in the presence of melatonin, NAS and CMLT, irrespective of glycemic status. The bactericidal activity of colostral phagocytes against enterophatogenic Escherichia coli (EPEC) increased in the presence of melatonin or NAS in the normoglycemic group, but not in the hyperglycemic group. Luzindole blocked melatonin action on colostrum phagocytes. Phagocytes from the normoglycemic group treated with melatonin exhibited an increase in intracellular Ca(2+) release. Phagocytes treated with TMB-8 (intracellular Ca(2+) inhibitor) decreased superoxide, bactericidal activity and intracellular Ca(2+) release in both groups. The results obtained suggest an interactive effect of glucose metabolism and melatonin on colostral phagocytes. In colostral phagocytes from normoglycemic mothers, melatonin likely increases the ability of colostrum to protect against EPEC and other infections. In diabetic mothers, because maternal hyperglycemia modifies the functional activity of colostrum phagocytes, melatonin effects are likely limited to anti-inflammatory processes, with low superoxide release and bactericidal activity.
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Affiliation(s)
- Gliciane Morceli
- Post Graduate Program in Gynecology, Obstetrics and Mastology of Botucatu Medical School, São Paulo State University/Unesp, Botucatu, São Paulo, Brazil
| | - Adenilda C. Honorio-França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Danny L. G. Fagundes
- Post Graduate Program in Gynecology, Obstetrics and Mastology of Botucatu Medical School, São Paulo State University/Unesp, Botucatu, São Paulo, Brazil
| | - Iracema M. P. Calderon
- Post Graduate Program in Gynecology, Obstetrics and Mastology of Botucatu Medical School, São Paulo State University/Unesp, Botucatu, São Paulo, Brazil
| | - Eduardo L. França
- Institute of Biological and Health Science, Federal University of Mato Grosso, Barra do Garças, Mato Grosso, Brazil
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Effects of melatonin on streptozotocin-induced retina neuronal apoptosis in high blood glucose rat. Neurochem Res 2013; 38:669-76. [PMID: 23299510 DOI: 10.1007/s11064-012-0966-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 12/21/2012] [Accepted: 12/26/2012] [Indexed: 12/17/2022]
Abstract
One of the main pathological symptoms of early diabetic retinal neuropathy is retina neuronal apoptosis. In the present work we investigated the effects of indoleamine hormone melatonin, a powerful free radical scavenger, on streptozotocin-induced retina neuronal cell apoptosis in high blood glucose rat. After melatonin treatment (10 mg/kg/day), tunel detection was used to monitor the apoptosis rate of neurons in the retinal ganglion cell layer; reversed quantitative PCR was used to measure the mRNA expression of retinal caspase-3, Mn superoxidase dismutase (SOD) and Cu-Zn SOD; and the activities of total SOD (T-SOD) and sub-type SOD was detected using xanthine oxidase enzymatic detection. Our data showed that melatonin treatment leads to a decrease of retinal cell apoptosis and the apoptotic index was (1.67 ± 0.54) % and (7.73 ± 0.95) % at 8 and 12 weeks after treatment. The relative quantitative (RQ) value for caspase-3 mRNA expression was (6.996 ± 1.192) and (7.267 ± 1.178) in melatonin group, which are much lower than the values of diabetic group (12.566 ± 2.272 and (14.297 ± 2.110) at 8 and 12 weeks, respectively) under the same condition. mRNA expression of Mn SOD and Cu-Zn SOD as well as their activities all decreased in the diabetic group compared with the control group. While melatonin treatment induced the expression of Mn SOD mRNA and a continual increase of Mn SOD activity as well as the activity and mRNA expression of Cu-Zn SOD at 12 weeks. Therefore, our results demonstrate that melatonin treatment prevented the decrease in mRNA expression of SOD and the increase in caspase-3 mRNA expression induced by diabetes thus exerts a beneficial effect on retina neuronal apoptosis.
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Campos LA, Cipolla-Neto J, Amaral FG, Michelini LC, Bader M, Baltatu OC. The Angiotensin-melatonin axis. Int J Hypertens 2013; 2013:521783. [PMID: 23365722 PMCID: PMC3556444 DOI: 10.1155/2013/521783] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 12/18/2012] [Accepted: 12/19/2012] [Indexed: 12/14/2022] Open
Abstract
Accumulating evidence indicates that various biological and neuroendocrine circadian rhythms may be disrupted in cardiovascular and metabolic disorders. These circadian alterations may contribute to the progression of disease. Our studies direct to an important role of angiotensin II and melatonin in the modulation of circadian rhythms. The brain renin-angiotensin system (RAS) may modulate melatonin synthesis, a hormone with well-established roles in regulating circadian rhythms. Angiotensin production in the central nervous system may not only influence hypertension but also appears to affect the circadian rhythm of blood pressure. Drugs acting on RAS have been proven effective in the treatment of cardiovascular and metabolic disorders including hypertension and diabetes mellitus (DM). On the other hand, since melatonin is capable of ameliorating metabolic abnormalities in DM and insulin resistance, the beneficial effects of RAS blockade could be improved through combined RAS blocker and melatonin therapy. Contemporary research is evidencing the existence of specific clock genes forming central and peripheral clocks governing circadian rhythms. Further research on the interaction between these two neurohormones and the clock genes governing circadian clocks may progress our understanding on the pathophysiology of disease with possible impact on chronotherapeutic strategies.
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Affiliation(s)
- Luciana A. Campos
- Center of Innovation, Technology and Education—(CITE), Camilo Castelo Branco University (UNICASTELO), São José dos Campos Technology Park, Presidente Dutra Road Km 138, 12247-004 São José dos Campos, SP, Brazil
| | - Jose Cipolla-Neto
- Department of Physiology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Fernanda G. Amaral
- Department of Physiology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Lisete C. Michelini
- Department of Physiology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Michael Bader
- Cardiovascular Research, Max Delbruck Center for Molecular Medicine, 13125 Berlin, Germany
| | - Ovidiu C. Baltatu
- Center of Innovation, Technology and Education—(CITE), Camilo Castelo Branco University (UNICASTELO), São José dos Campos Technology Park, Presidente Dutra Road Km 138, 12247-004 São José dos Campos, SP, Brazil
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Simsek N, Kaya M, Kara A, Can I, Karadeniz A, Kalkan Y. Effects of melatonin on islet neogenesis and beta cell apoptosis in streptozotocin-induced diabetic rats: an immunohistochemical study. Domest Anim Endocrinol 2012; 43:47-57. [PMID: 22541933 DOI: 10.1016/j.domaniend.2012.02.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 01/30/2012] [Accepted: 02/01/2012] [Indexed: 01/19/2023]
Abstract
This investigation was carried out to explore the antidiabetic, antiapoptotic and neogenetic effects of melatonin (MLT) in streptozotocin-induced diabetic rats. Sixty-four male rats were assigned randomly to one of four groups for periods of 21 and 42 d as follows; i) control, ii) MLT, iii) diabetic (DM), and iv) DM + MLT. Immunohistochemical methods were used -with pancreatic tissue to determine the intensity of insulin, caspase-3 and Bcl-x(L) immune reactivities, and new islet formation. In untreated DM rats, BW loss, increased plasma glucose and MLT concentrations, as well as cytoplasmic degranulation and vacuolization were observed. We also observed a marked increase in the number of apoptotic caspase-3 positive cells and a few insulin- positive cells, but not antiapoptotic Bcl-x(L) positive cells. Observations in the DM + MLT-treated group revealed a high intensity of insulin- and antiapoptotic Bcl-x(L) immune reactivities at 21 and 42 d. Moreover, data indicated that MLT may cause beta cell proliferation and that new small islets originate from cells associated with ductal epithelium and from centroacinar cells by day 21. These data indicate that; i) MLT treatment may stimulate neogenesis in the pancreas of diabetic rats, and ii) MLT's antiapoptotic action may increase beta cell differentiation and caspase-3 inactivation or Bcl-x(L) activation.
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Affiliation(s)
- N Simsek
- Department of Histology and Embryology, Faculty of Veterinary Sciences, Atatürk University, 25240, Erzurum, Turkey.
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Gene regulation by melatonin linked to epigenetic phenomena. Gene 2012; 503:1-11. [DOI: 10.1016/j.gene.2012.04.040] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/29/2012] [Accepted: 04/17/2012] [Indexed: 12/13/2022]
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Finamor IA, Saccol EM, Gabriel D, Ourique GM, Riffel AP, Konrad SP, Belló-Klein A, Partata W, Baldisserotto B, Llesuy SF, Pavanato MA. Effects of Parboiled Rice Diet on Oxidative Stress Parameters in Kidney of Rats with Streptozotocin-Induced Diabetes. J Med Food 2012; 15:598-604. [DOI: 10.1089/jmf.2011.0306] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Isabela A. Finamor
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Etiane M.H. Saccol
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Diogo Gabriel
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Giovana M. Ourique
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Ana P.K. Riffel
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Signorá P. Konrad
- Nutrition College, University of Vale do Rio dos Sinos (UNISINOS), São Leopoldo, Rio Grande do Sul, Brazil
| | - Adriane Belló-Klein
- Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Wania Partata
- Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Bernardo Baldisserotto
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Susana F. Llesuy
- Department of Analytical Chemistry and Physical Chemistry, University of Buenos Aires (UBA), Buenos Aires, Argentina
| | - Maria A. Pavanato
- Department of Physiology and Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
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Korkmaz A, Ma S, Topal T, Rosales-Corral S, Tan DX, Reiter RJ. Glucose: a vital toxin and potential utility of melatonin in protecting against the diabetic state. Mol Cell Endocrinol 2012; 349:128-37. [PMID: 22079284 DOI: 10.1016/j.mce.2011.10.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 10/14/2011] [Indexed: 12/29/2022]
Abstract
The molecular mechanisms including elevated oxidative and nitrosative reactants, activation of pro-inflammatory transcription factors and subsequent inflammation appear as a unified pathway leading to metabolic deterioration resulting from hyperglycemia, dyslipidemia, and insulin resistance. Consistent evidence reveals that chronically-elevated blood glucose initiates a harmful series of processes in which toxic reactive species play crucial roles. As a consequence, the resulting nitro-oxidative stress harms virtually all biomolecules including lipids, proteins and DNA leading to severely compromised metabolic activity. Melatonin is a multifunctional indoleamine which counteracts several pathophysiologic steps and displays significant beneficial effects against hyperglycemia-induced cellular toxicity. Melatonin has the capability of scavenging both oxygen and nitrogen-based reactants and blocking transcriptional factors which induce pro-inflammatory cytokines. These functions contribute to melatonin's antioxidative, anti-inflammatory and possibly epigenetic regulatory properties. Additionally, melatonin restores adipocyte glucose transporter-4 loss and eases the effects of insulin resistance associated with the type 2 diabetic state and may also assist in the regulation of body weight in these patients. Current knowledge suggests the clinical use of this non-toxic indoleamine in conjunction with other treatments for inhibition of the negative consequences of hyperglycemia for reducing insulin resistance and for regulating the diabetic state.
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Affiliation(s)
- Ahmet Korkmaz
- Department of Physiology, School of Medicine, Gulhane Military Medical Academy, Ankara, Turkey
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Effects of melatonin on the activity of the glutathione antioxidant system and various NADPH-generating enzymes in the liver and blood of rats with type 2 diabetes mellitus. Pharm Chem J 2011. [DOI: 10.1007/s11094-011-0640-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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50
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Cheshchevik VT, Dremza IK, Lapshina EA, Zabrodskaya SV, Kujawa J, Zavodnik IB. Corrections by melatonin of liver mitochondrial disorders under diabetes and acute intoxication in rats. Cell Biochem Funct 2011; 29:481-8. [PMID: 21744370 DOI: 10.1002/cbf.1775] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 02/16/2011] [Accepted: 05/17/2011] [Indexed: 12/13/2022]
Abstract
The aim of the present work was to investigate the mechanisms of oxidative damage of the liver mitochondria under diabetes and intoxication in rats as well as to evaluate the possibility of corrections of mitochondrial disorders by pharmacological doses of melatonin. The experimental (30 days) streptozotocin-induced diabetes mellitus caused a significant damage of the respiratory activity in rat liver mitochondria. In the case of succinate as a respiratory substrate, the ADP-stimulated respiration rate V₃ considerably decreased (by 25%, p < 0·05) as well as the acceptor control ratio (ACR) V₃/V₂ markedly diminished (by 25%, p < 0·01). We observed a decrease of the ADP-stimulated respiration rate V₃ by 35% (p < 0·05), with glutamate as substrate. In this case, ACR also decreased (by 20%, p < 0·05). Surprisingly, the phosphorylation coefficient ADP/O did not change under diabetic liver damage. Acute rat carbon tetrachloride-induced intoxication resulted in considerable decrease of the phosphorylation coefficient because of uncoupling of the oxidation and phosphorylation processes in the liver mitochondria. The melatonin administration during diabetes (10 mg·kg⁻¹ body weight, 30 days, daily) showed a considerable protective effect on the liver mitochondrial function, reversing the decreased respiration rate V₃ and the diminished ACR to the control values both for succinate-dependent respiration and for glutamate-dependent respiration. The melatonin administration to intoxicated animals (10 mg·kg⁻¹ body weight, three times) partially increased the rate of succinate-dependent respiration coupled with phosphorylation. The impairment of mitochondrial respiratory plays a key role in the development of liver injury under diabetes and intoxication. Melatonin might be considered as an effector that regulates the mitochondrial function under diabetes.
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Affiliation(s)
- Vitali T Cheshchevik
- Institute for Pharmacology and Biochemistry, National Academy of Sciences of Belarus, Grodno, Belarus
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