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Gluvic Z, Obradovic M, Manojlovic M, Vincenza Giglio R, Maria Patti A, Ciaccio M, Suri JS, Rizzo M, Isenovic ER. Impact of different hormones on the regulation of nitric oxide in diabetes. Mol Cell Endocrinol 2024; 592:112325. [PMID: 38968968 DOI: 10.1016/j.mce.2024.112325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/10/2024] [Accepted: 07/02/2024] [Indexed: 07/07/2024]
Abstract
Polymetabolic syndrome achieved pandemic proportions and dramatically influenced public health systems functioning worldwide. Chronic vascular complications are the major contributors to increased morbidity, disability, and mortality rates in diabetes patients. Nitric oxide (NO) is among the most important vascular bed function regulators. However, NO homeostasis is significantly deranged in pathological conditions. Additionally, different hormones directly or indirectly affect NO production and activity and subsequently act on vascular physiology. In this paper, we summarize the recent literature data related to the effects of insulin, estradiol, insulin-like growth factor-1, ghrelin, angiotensin II and irisin on the NO regulation in physiological and diabetes circumstances.
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Affiliation(s)
- Zoran Gluvic
- University Clinical-Hospital Centre Zemun-Belgrade, Clinic of Internal Medicine, Department of Endocrinology and Diabetes, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
| | - Milan Obradovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Mia Manojlovic
- Faculty of Medicine Novi Sad, University of Novi Sad, Novi Sad, Serbia; Clinic for Endocrinology, Diabetes and Metabolic Disorders, Clinical Center of Vojvodina, Novi Sad, Serbia
| | - Rosaria Vincenza Giglio
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, University of Palermo, Italy; Department of Laboratory Medicine, University Hospital, Palermo, Italy
| | - Angelo Maria Patti
- Department of Health Promotion Sciences Maternal and Infantile Care, Internal Medicine and Medical Specialties, University of Palermo, Italy
| | - Marcello Ciaccio
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, University of Palermo, Italy; Department of Laboratory Medicine, University Hospital, Palermo, Italy
| | - Jasjit S Suri
- Stroke Monitoring and Diagnostic Division, AtheroPoint™, Roseville, CA, 95661, USA
| | - Manfredi Rizzo
- Internal Medicine Unit, "Vittorio Emanuele II" Hospital, Castelvetrano, Italy
| | - Esma R Isenovic
- Department of Radiobiology and Molecular Genetics, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
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The effect of ghrelin on antioxidant status in the rat's model of Alzheimer's disease induced by amyloid-beta. Biomedicine (Taipei) 2023; 12:44-54. [PMID: 36816173 PMCID: PMC9910231 DOI: 10.37796/2211-8039.1341] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 05/28/2022] [Accepted: 05/30/2022] [Indexed: 11/27/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder associated with amyloid-beta (Aβ) plaque formation and oxidative stress in the brain. Ghrelin has been proven to exert antioxidant activity and neuroprotection in different neurological diseases. This study is going on to examine the effect of ghrelin on antioxidant status in the rat's model of AD induced by Aβ. Cognitive impairment was induced by intra-hippocampal administration of Aβ (10 μg) in Wistar rats and ghrelin (80 μg/kg) was administrated intraperitoneal for ten consecutive days. Behavior was assessed with Morris water maze and passive avoidance tests. Malondialdehyde (MDA) level as a marker of lipid peroxidation was assessed using the thiobarbituric acid. Catalase activity was assayed by the decomposition of H2O2. Antioxidant capacity was determined using the FRAP method. Treatment with ghrelin decreased the hippocampus and serum MDA levels in wild-type rodents and prevented an increase in hippocampal and serum MDA levels in animals receiving Aβ. There was no significant change in the serum catalase activity between the studied groups. Hippocampus catalase activity was reduced in the Aβ group and treatment with ghrelin increased it. The antioxidant capacity of the hippocampus and serum increased in the ghrelin-receiving control group. The hippocampus antioxidant capacity level decreased in the Aβ group, and treatment with ghrelin increased it, but there were no significant changes in the serum antioxidant capacity of animals receiving Aβ. These results provide evidence that the administration of ghrelin has antioxidant properties and protects against hippocampal lipid peroxidation in a rat model of AD.
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Radovanovic J, Banjac K, Obradovic M, Isenovic ER. Antioxidant enzymes and vascular diseases. EXPLORATION OF MEDICINE 2021. [DOI: 10.37349/emed.2021.00070] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Reactive oxygen species (ROS) and reactive nitrogen species (RNS) play a fundamental role in regulating endothelial function and vascular tone in the physiological conditions of a vascular system. However, oxidative stress has detrimental effects on human health, and numerous studies confirmed that high ROS/RNS production contributes to the initiation and progression of cardiovascular diseases. The antioxidant defense has an essential role in the homeostatic functioning of the vascular endothelial system. Endogenous antioxidative defense includes various molecules and enzymes such as superoxide dismutase, catalase, glutathione reductase, and glutathione peroxidase. Together all these antioxidative enzymes are essential for defense against harmful ROS features. ROS are mainly generated from redox-active compounds involved in the mitochondrial respiratory chain. Thus, targeting antioxidative enzymes and mitochondria oxidative balance may be a promising approach for vascular diseases occurrence and treatment. This review summarized the most recent research on the regulation of antioxidative enzymes in vascular diseases.
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Affiliation(s)
- Jelena Radovanovic
- Department of Radiobiology and Molecular Genetics, “VINČA” Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 522 Belgrade, Serbia
| | - Katarina Banjac
- Department of Radiobiology and Molecular Genetics, “VINČA” Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 522 Belgrade, Serbia
| | - Milan Obradovic
- Department of Radiobiology and Molecular Genetics, “VINČA” Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 522 Belgrade, Serbia
| | - Esma R. Isenovic
- Department of Radiobiology and Molecular Genetics, “VINČA” Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 522 Belgrade, Serbia
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Bademci R, Erdoğan MA, Eroğlu E, Meral A, Erdoğan A, Atasoy Ö, Erbaş O. Demonstration of the protective effect of ghrelin in the livers of rats with cisplatin toxicity. Hum Exp Toxicol 2021; 40:2178-2187. [PMID: 34151639 DOI: 10.1177/09603271211026722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Despite the various and newly developed chemotherapeutic agents in recent years, cisplatin is still used very frequently as a chemotherapeutic agent, even though cisplatin has toxic effects on many organs. The aim of our study is to show whether ghrelin reduces the liver toxicity of cisplatin in the rat model. Twenty-eight male Sprague Dawley albino mature rats were chosen to be utilized in the study. Group 1 rats (n = 7) were taken as the control group, and no medication was given to them. Group 2 rats (n = 7) received 5 mg/kg/day cisplatin and 1 ml/kg/day of 0.9% NaCl, Group 3 rats (n = 7) received 5 mg/kg/day cisplatin and 10 ng/kg/day ghrelin, Group 4 rats (n = 7) received 5 mg/kg/day cisplatin and 20 ng/kg/day ghrelin for 3 days. Glutathione, malondialdehyde (MDA), superoxide dismutase (SOD), plasma alanine aminotransferase (ALT) levels, and liver biopsy results were measured in rats. It was determined that, especially in the high-dose group, the MDA, plasma ALT, and SOD levels increased less in the ghrelin group as compared to the cisplatin group, and the glutathione level decreased slightly with a low dose of ghrelin, while it increased with a higher dose. In histopathological examination, it was determined that the toxic effect of cisplatin on the liver was reduced with a low dose of ghrelin, and its histopathological appearance was similar to normal liver tissue when given a high dose of ghrelin. These findings show that ghrelin, especially in high doses, can be used to reduce the toxic effect of cisplatin.
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Affiliation(s)
- R Bademci
- Department of General Surgery, 218502Istanbul Medipol University, Istanbul, Turkey
| | - M A Erdoğan
- Faculty of Medicine, Department of Physiology, 485550Izmir Katip Çelebi University, Izmir, Turkey
| | - E Eroğlu
- Department of General Surgery, 64117Memorial Hospital, Istanbul, Turkey
| | - A Meral
- Medical Faculty, Department of Biochemistry, 64162Yuzuncü Yıl University, Van, Turkey
| | - A Erdoğan
- Department of Emergency Medicine, Izmir Cigli Regional Training Hospital, Izmir, Turkey
| | - Ö Atasoy
- Department of Radiation Oncology, Kartal Dr. Lütfi Kırdar Training and Research Hospital, Istanbul, Turkey
| | - O Erbaş
- Department of Physiology, Istanbul Bilim University, Istanbul, Turkey
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Verbeure W, van Goor H, Mori H, van Beek AP, Tack J, van Dijk PR. The Role of Gasotransmitters in Gut Peptide Actions. Front Pharmacol 2021; 12:720703. [PMID: 34354597 PMCID: PMC8329365 DOI: 10.3389/fphar.2021.720703] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 07/07/2021] [Indexed: 12/31/2022] Open
Abstract
Although gasotransmitters nitric oxide (NO), carbon monoxide (CO) and hydrogen sulfide (H2S) receive a bad connotation; in low concentrations these play a major governing role in local and systemic blood flow, stomach acid release, smooth muscles relaxations, anti-inflammatory behavior, protective effect and more. Many of these physiological processes are upstream regulated by gut peptides, for instance gastrin, cholecystokinin, secretin, motilin, ghrelin, glucagon-like peptide 1 and 2. The relationship between gasotransmitters and gut hormones is poorly understood. In this review, we discuss the role of NO, CO and H2S on gut peptide release and functioning, and whether manipulation by gasotransmitter substrates or specific blockers leads to physiological alterations.
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Affiliation(s)
- Wout Verbeure
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, Leuven, Belgium
| | - Harry van Goor
- Departement of Endocrinology, University Medical Center Groningen, Groningen, Netherlands
| | - Hideki Mori
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, Leuven, Belgium
| | - André P van Beek
- Departement of Endocrinology, University Medical Center Groningen, Groningen, Netherlands
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, Leuven, Belgium
| | - Peter R van Dijk
- Departement of Endocrinology, University Medical Center Groningen, Groningen, Netherlands
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Abstract
Background Oxidative stress is the result of cellular troubles related to aerobic metabolism. Furthermore, this stress is always associated with biological responses evoked by physical, chemical, environmental, and psychological factors. Several studies have developed many approaches of antioxidant defense to diminish the severity of many diseases. Ghrelin was originally identified from the rat stomach, and it is a potent growth hormone-releasing peptide that has pleiotropic functions. Methods A systematic review was conducted within PubMed, ScienceDirect, MEDLINE, and Scopus databases using keywords such as ghrelin, antioxidant, oxidative stress, and systemic oxidative stress sensor. Results In the last decade, many studies show that ghrelin exhibits protection effects against oxidative stress derived probably from its antioxidant effects. Pieces of evidence demonstrate that systemic oxidative stress increase ghrelin levels in the plasma. The expression of ghrelin and its receptor in ghrelin peripheral tissues and extensively in the central nervous system suggests that this endogenous peptide plays an important role as a systemic oxidative stress sensor Conclusion The current evidence confirms that ghrelin and its derived peptides (Desacyl-ghrelin, obestatin) act as a protective antioxidant agent. Therefore, stressor modality, duration, and intensity are the parameters of oxidative stress that must be taken into consideration to determine the role of ghrelin, Desacyl-ghrelin, and obestatin in the regulation of cell death pathways.
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Affiliation(s)
- Rachid Akki
- Department of Plant Protection and Environment, National School of Agriculture-Meknes/ENA, Meknes, Morocco.,Department of Biology, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Kawtar Raghay
- Department of Biology, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Mohammed Errami
- Department of Biology, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
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Yi R, Deng L, Mu J, Li C, Tan F, Zhao X. The Impact of Antarctic Ice Microalgae Polysaccharides on D-Galactose-Induced Oxidative Damage in Mice. Front Nutr 2021; 8:651088. [PMID: 33768108 PMCID: PMC7985059 DOI: 10.3389/fnut.2021.651088] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 02/16/2021] [Indexed: 11/13/2022] Open
Abstract
Antarctic ice microalgae (Chlamydomonas sp.) are a polysaccharide-rich natural marine resource. In this study, we evaluated the impact of Antarctic ice microalgae polysaccharides (AIMP) on D-galactose-induced oxidation in mice. We conducted biological and biochemical tests on tissue and serum samples from mice treated with AIMP. We found that AIMP administration was associated with improved thymus, brain, heart, liver, spleen, and kidney index values. We also found that AIMP treatment inhibited the reduced aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, superoxide dismutase, glutathione peroxidase, and glutathione levels as well as the increased serum, splenic, and hepatic nitric oxide and malondialdehyde levels arising from oxidation in these animals. Pathological examination revealed that AIMP also inhibited D-galactose-induced oxidative damage to the spleen, liver, and skin of these animals. AIMP was additionally found to promote the upregulation of neuronal nitric oxide synthase, endothelial nitric oxide synthase, cuprozinc-superoxide dismutase, manganese superoxide dismutase, catalase, heme oxygenase-1, nuclear factor erythroid 2-related factor 2, γ-glutamylcysteine synthetase, and NAD(P)H dehydrogenase [quinone] 1 as well as the downregulation of inducible nitric oxide synthase in these animals. High-performance liquid chromatography analysis revealed AIMP to be composed of five monosaccharides (mannitol, ribose, anhydrous glucose, xylose, and fucose). Together, these results suggest that AIMP can effectively inhibit oxidative damage more readily than vitamin C in mice with D-galactose-induced oxidative damage, which underscores the value of developing AIMP derivatives for food purposes.
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Affiliation(s)
- Ruokun Yi
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing, China
| | - Lei Deng
- Department of Gastroenterology and Hepatology, Chongqing University Central Hospital (Chongqing Emergency Medical Center), Chongqing, China
| | - Jianfei Mu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing, China
| | - Chong Li
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing, China
| | - Fang Tan
- Department of Public Health, Our Lady of Fatima University, Valenzuela, Philippines
| | - Xin Zhao
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing, China.,Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing, China
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Dumortier L, Bricout VA. Obstructive sleep apnea syndrome in adults with down syndrome: Causes and consequences. Is it a "chicken and egg" question? Neurosci Biobehav Rev 2020; 108:124-138. [DOI: 10.1016/j.neubiorev.2019.10.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/11/2019] [Accepted: 10/26/2019] [Indexed: 12/31/2022]
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Ramírez ND, Luque EM, Jones XM, Torres PJ, Moreira Espinoza MJ, Cantarelli V, Ponzio MF, Arja A, Rabaglino MB, Martini AC. Modulatory effects of ghrelin on sperm quality alterations induced by a fructose-enriched diet. Heliyon 2019; 5:e02886. [PMID: 31844755 PMCID: PMC6895644 DOI: 10.1016/j.heliyon.2019.e02886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/27/2019] [Accepted: 11/15/2019] [Indexed: 11/26/2022] Open
Abstract
The objectives of this study were: 1) to evaluate the effects of a fructose enriched diet (FED) on rat sperm quality, epididymal function (i.e. oxidative stress and alpha-glucosidase expression) and testosterone concentrations; 2) to determine if the administration of ghrelin (Ghrl), reverses the effects induced by FED. After validating the protocol as an inductor of metabolic syndrome like-symptoms, adult male rats were assigned to one of the following treatments for 8 weeks: FED = 10% fructose enriched in water (v/v); FED + Ghrl = fructose enriched diet plus Ghrl (6 nmol/animal/day, s.c.) from week 6-8; or C = water without fructose (n = 5-10 animals/group). FED significantly decreased sperm concentration and motile sperm count/ml vs C (FED: 19.0 ± 1.6 × 106sperm/ml and 834.6 ± 137.0, respectively vs C: 25.8 ± 2.8 × 106 and 1300.4 ± 202.4, respectively; p < 0.05); ghrelin injection reversed this negative effect (23.5 ± 1.6 × 106sperm/ml and 1381.7 ± 71.3 respectively). FED resulted in hypogonadism, but Ghrl could not normalize testosterone concentrations (C: 1.4 ± 0.1 ng/ml vs FED: 0.8 ± 0.2 ng/ml and FED + Ghrl: 0.6 ± 0.2 ng/ml; p < 0.05). Ghrelin did not reverse metabolic abnormalities secondary to FED. FED did not alter epididymal expression of antioxidants enzymes (superoxido-dismutase, catalase and glutathione peroxidases -Gpx-). Nevertheless, FED + Ghrl significantly increased the expression of Gpx3 (FED + Ghrl: 3.47 ± 0.48 vs FED: 0.69 ± 0.28 and C: 1.00 ± 0.14; p < 0.05). The expression of neutral alpha-glucosidase, which is a marker of epididymal function, did not differ between treatments. In conclusion, the administration of Ghrl modulated the negative effects of FED on sperm quality, possibly by an epididymal increase in Gpx3 expression. However, Ghrl could not neither normalize the metabolism of FED animals, nor reverse hypogonadism.
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Affiliation(s)
- Nicolás David Ramírez
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina
| | - Eugenia Mercedes Luque
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina
| | - Xaviar Michael Jones
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina
| | - Pedro Javier Torres
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA), CONICET-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Pabellón de Biología Celular, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - María José Moreira Espinoza
- Instituto de Biología Celular, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Verónica Cantarelli
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA), CONICET-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Pabellón de Biología Celular, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Marina Flavia Ponzio
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA), CONICET-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Pabellón de Biología Celular, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Ana Arja
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina
| | - María Belén Rabaglino
- Instituto de Investigaciones en Ciencias de la Salud (INICSA), CONICET-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Pabellón de Biología Celular, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Ana Carolina Martini
- Instituto de Fisiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU, Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA), CONICET-Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros esq, Enfermera Gordillo, Pabellón de Biología Celular, Ciudad Universitaria, 5016, Córdoba, Argentina
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Zheng H, Liang W, He W, Huang C, Chen Q, Yi H, Long L, Deng Y, Zeng M. Ghrelin attenuates sepsis-induced acute lung injury by inhibiting the NF-κB, iNOS, and Akt signaling in alveolar macrophages. Am J Physiol Lung Cell Mol Physiol 2019; 317:L381-L391. [PMID: 31242025 DOI: 10.1152/ajplung.00253.2018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Ghrelin has proven to be protective against sepsis-induced acute lung injury (ALI) via anti-inflammatory effects. However, its mechanisms remain poorly understood. Alveolar macrophages (AMs) play a key role in mediating inflammatory responses during sepsis-induced ALI by secretion of cytokines and chemokines. This study was undertaken to investigate whether ghrelin suppresses inflammatory effects of AMs and therefore may help to attenuate sepsis-induced ALI. A sepsis model in rats was achieved using cecal ligation and puncture. Ghrelin treatment markedly improved histopathological changes in the lungs and reduced pulmonary inflammation in septic rats. NF-κB translocation and p-Akt and inducible nitric oxide synthase (iNOS) activities in AMs from septic rats were suppressed by ghrelin. In vitro data indicated that ghrelin decreased the levels of LPS-induced IL-1β, TNF-α, and IL-6, NF-κB translocation, and iNOS and Akt activities of AMs. Furthermore, the NF-κB/iNOS pathway or Akt signaling was positively correlated with LPS-induced inflammatory production of AMs in vitro. In conclusion, ghrelin exerts a protective role against sepsis-induced ALI probably by reducing the production of inflammatory cytokines from AMs via inhibition of the NF-κB/iNOS pathway or Akt signaling.
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Affiliation(s)
- Haichong Zheng
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Wenjie Liang
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Wanmei He
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Chunrong Huang
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Qingui Chen
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Hui Yi
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Lingli Long
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yubin Deng
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Mian Zeng
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
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11
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Schaalan MF, Ramadan BK, H. Abd Elwahab A. Ameliorative effect of taurine-chloramine in azathioprine-induced testicular damage; a deeper insight into the mechanism of protection. Altern Ther Health Med 2018; 18:255. [PMID: 30223827 PMCID: PMC6142322 DOI: 10.1186/s12906-018-2272-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/26/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND The male reproductive system is a sensitive and intricate process that can be distressed following exposure to various toxicants. Therapeutic drugs, especially chemotherapeutics, can also adversely affect male fertility by instigating hormonal changes leading to testicular cells injury. Azathioprine (AZA) is an effective anticancer drug, but some cases of testicular toxicity have been reported. The aim of this work was to investigate the protective effects of taurine chloramine (TAU-Cl), a reported antioxidant and antiinflammtory peptide, against AZA-induced testicular dysfunction in male rats and ascertain the contributing mechanisms. METHODS Forty male rats were allocated into four equal groups; (i) normal control rats, (ii) TAU-Cl group (100 mg/kg b.w/day for 10 weeks, (iii) AZA group (5 mg/day for 4 weeks); (iv) TAU-Cl/AZA group. RESULTS AZA caused increased DNA damage in the testes, and alterations in sex hormones and sperm quality, including sperm count, viability, and motility. Moreover, testicular tissue from the AZA-treated group had increased levels of oxidative stress indicator, MDA, and decreased activity of the antioxidant enzymes as superoxide dismutase (SOD), reduced glutathione (GSH) and catalase (CAT) levels. These deleterious events were accompanied by upregulated levels of the pro-inflammatory cytokines, tumor necrosis factor-alpha (TNF-α), and protein expression of iNOS and NFκB-p65, interleukin-1beta (IL-1β), and proapoptotic marker; caspase-9, together with decreased Bcl-2, NrF2 and hemeoxygenase (HO-1) expression. In contrast, TAU-Cl pretreatment significantly abrogated these toxic effects which were confirmed histologically. CONCLUSION Pretreatment with TAU-Cl exerts a protective effect against AZA-induced male reproductive testicular atrophy. This finding could open new avenues for the use of TAU-Cl as a complementary approach to chemotherapy supportive care.
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Ugwu FN, Yu AP, Sin TK, Tam BT, Lai CW, Wong SC, Siu PM. Protective Effect of Unacylated Ghrelin on Compression-Induced Skeletal Muscle Injury Mediated by SIRT1-Signaling. Front Physiol 2017; 8:962. [PMID: 29225581 PMCID: PMC5705540 DOI: 10.3389/fphys.2017.00962] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/10/2017] [Indexed: 12/30/2022] Open
Abstract
Unacylated ghrelin, the predominant form of circulating ghrelin, protects myotubes from cell death, which is a known attribute of pressure ulcers. In this study, we investigated whether unacylated ghrelin protects skeletal muscle from pressure-induced deep tissue injury by abolishing necroptosis and apoptosis signaling and whether these effects were mediated by SIRT1 pathway. Fifteen adult Sprague Dawley rats were assigned to receive saline or unacylated ghrelin with or without EX527 (a SIRT1 inhibitor). Animals underwent two 6-h compression cycles with 100 mmHg static pressure applied over the mid-tibialis region of the right limb whereas the left uncompressed limb served as the intra-animal control. Muscle tissues underneath the compression region, and at the similar region of the opposite uncompressed limb, were collected for analysis. Unacylated ghrelin attenuated the compression-induced muscle pathohistological alterations including rounding contour of myofibers, extensive nucleus accumulation in the interstitial space, and increased interstitial space. Unacylated ghrelin abolished the increase in necroptosis proteins including RIP1 and RIP3 and attenuated the elevation of apoptotic proteins including p53, Bax, and AIF in the compressed muscle. Furthermore, unacylated ghrelin opposed the compression-induced phosphorylation and acetylation of p65 subunit of NF-kB. The anti-apoptotic effect of unacylated ghrelin was shown by a decrease in apoptotic DNA fragmentation and terminal dUTP nick-end labeling index in the compressed muscle. The protective effects of unacylated ghrelin vanished when co-treated with EX527. Our findings demonstrated that unacylated ghrelin protected skeletal muscle from compression-induced injury. The myoprotective effects of unacylated ghrelin on pressure-induced tissue injury were associated with SIRT1 signaling.
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Affiliation(s)
- Felix N Ugwu
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Angus P Yu
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, Hong Kong
| | - Thomas K Sin
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Bjorn T Tam
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Christopher W Lai
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - S C Wong
- Department of Health Technology and Informatics, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Parco M Siu
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, Hong Kong
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Ishii N, Tsubouchi H, Miura A, Yanagi S, Ueno H, Shiomi K, Nakazato M. Ghrelin alleviates paclitaxel-induced peripheral neuropathy by reducing oxidative stress and enhancing mitochondrial anti-oxidant functions in mice. Eur J Pharmacol 2017; 819:35-42. [PMID: 29154935 DOI: 10.1016/j.ejphar.2017.11.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/31/2017] [Accepted: 11/14/2017] [Indexed: 01/24/2023]
Abstract
Paclitaxel is an effective chemotherapeutic agent, but has some treatment-limiting adverse effects that markedly decrease patients' quality of life. Peripheral neuropathy is one of these, and no treatment for it has been established yet. Ghrelin, an endogenous ligand for the growth hormone secretagogue receptor, is secreted from the stomach and has widespread effects on multiple systems. We investigated the pharmacological potential of ghrelin in preventing paclitaxel-induced peripheral neuropathy using wild-type mice, ghrelin-null mice, and growth hormone secretagogue receptor-null mice. In wild-type mice, ghrelin administration alleviated mechanical and thermal hypersensitivity, and partially prevented neuronal loss of small unmyelinated intraepidermal nerve fibers but not large myelinated nerve fibers. Moreover, ghrelin administration decreased plasma oxidative and nitrosative stress and increased the expression of uncoupling protein 2 (UCP2) and superoxide dismutase 2 (SOD2) in the dorsal root ganglia, which are mitochondrial antioxidant proteins, and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), a regulator of mitochondrial number. Both ghrelin-null mice and growth hormone secretagogue receptor-null mice developed more severe nerve injuries than wild-type mice. Our results suggest that ghrelin administration exerts a protective effect against paclitaxel-induced neuropathy by reducing oxidative stress and enhancing mitochondrial anti-oxidant functions, and that endogenous ghrelin has a neuroprotective effect that is mediated by ghrelin/growth hormone secretagogue receptor signaling. Ghrelin could be a promising therapeutic agent for the management of this intractable disease.
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Affiliation(s)
- Nobuyuki Ishii
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hironobu Tsubouchi
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
| | - Ayako Miura
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Shigehisa Yanagi
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hiroaki Ueno
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Kazutaka Shiomi
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Masamitsu Nakazato
- Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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Ghrelin Protects Human Lens Epithelial Cells against Oxidative Stress-Induced Damage. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:1910450. [PMID: 29129986 PMCID: PMC5654336 DOI: 10.1155/2017/1910450] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/18/2017] [Accepted: 04/23/2017] [Indexed: 12/13/2022]
Abstract
Oxidative stress has been recognized as an important mediator in the pathogenesis of age-related cataracts; using antioxidant supplements is one plausible strategy to protect the antioxidative defense system against oxidative stress. Ghrelin administration is expected to reduce ROS, preventing the onset of different diseases. The role of ghrelin, if any, in protecting against oxidative stress in HLECs has never been examined. In the present study, we investigated the effects of ghrelin against H2O2-induced oxidative stress and the associated molecular mechanisms in HLECs and rat lenses. The results showed that pretreatment with ghrelin reduced H2O2-induced cellular apoptosis and ROS accumulation, increased the expression levels of SOD and CAT, and decreased the expression level of MDA. The morphological examination showed that the ghrelin-treated lens organ culture maintained transparency. This is the first report to show that ghrelin can protect HLECs from H2O2-induced oxidative stress. Our findings suggest that ghrelin may prevent the progression of cataracts, which has treatment value for ophthalmologists.
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Ruchała M, Bromińska B, Cyrańska-Chyrek E, Kuźnar-Kamińska B, Kostrzewska M, Batura-Gabryel H. Obstructive sleep apnea and hormones - a novel insight. Arch Med Sci 2017; 13:875-884. [PMID: 28721156 PMCID: PMC5507108 DOI: 10.5114/aoms.2016.61499] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 06/07/2016] [Indexed: 12/13/2022] Open
Abstract
Obstructive sleep apnea (OSA), a disorder characterized by repetitive collapse of the upper respiratory tract during sleep, occurs in about 4% of middle-aged men and 2% of women. The incidence of the disorder is rising due to an increase in obesity and ageing of the population. Patients with obstructive sleep apnea are at elevated risk of some endocrinal and metabolic disorders, which may lead to serious consequences including shortening of life expectancy. The recognition and understanding of interactions between local upper airway dysfunction and its endocrinal consequences is therefore vital. In this review we will focus on the influence of OSA on bone metabolism and endocrine homeostasis.
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Affiliation(s)
- Marek Ruchała
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Barbara Bromińska
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Ewa Cyrańska-Chyrek
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Barbara Kuźnar-Kamińska
- Department of Pulmonology, Allergology and Respiratory Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Magdalena Kostrzewska
- Department of Pulmonology, Allergology and Respiratory Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Halina Batura-Gabryel
- Department of Pulmonology, Allergology and Respiratory Oncology, Poznan University of Medical Sciences, Poznan, Poland
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Ramos C, Brito R, González-Montero J, Valls N, Gormaz JG, Prieto JC, Aguayo R, Puentes Á, Noriega V, Pereira G, Palavecino T, Rodrigo R. Effects of a novel ascorbate-based protocol on infarct size and ventricle function in acute myocardial infarction patients undergoing percutaneous coronary angioplasty. Arch Med Sci 2017; 13:558-567. [PMID: 28507569 PMCID: PMC5420620 DOI: 10.5114/aoms.2016.59713] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 03/15/2016] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION This study was designed to test the hypothesis that high-dose ascorbate prior to reperfusion followed by low chronic oral doses ameliorate myocardial reperfusion injury (MRI) in acute myocardial infarction patients subjected to primary percutaneous coronary angioplasty (PCA). MATERIAL AND METHODS A randomized double-blind placebo-controlled and multicenter clinical trial was performed on acute myocardial infarction (AMI) patients who underwent PCA. Sodium ascorbate (320 mmol/l, n = 53) or placebo (n = 46) was infused 30 min prior to PCA. Blood samples were drawn at enrolment (M1), after balloon deflation (M2), 6-8 h after M2 (M3) and at discharge (M4). Total antioxidant capacity of plasma (ferric reducing ability of plasma - FRAP), erythrocyte reduced glutathione (GSH) and plasma ascorbate levels were determined in blood samples. Cardiac magnetic resonance (CMR) was performed at 7-15 days and 2-3 months following PCA. Ninety-nine patients were enrolled. In 67 patients, the first CMR was performed, and 40 patients completed follow-up. RESULTS The ascorbate group showed significantly higher ascorbate and FRAP levels and a decrease in the GSH levels at M2 and M3 (p < 0.05). There were no significant differences in the infarct size, indexed end-systolic volume and ejection fraction at both CMRs. There was a significant amelioration in the decreased ejection fraction between the first and second CMR in the ascorbate group (p < 0.05). CONCLUSIONS Ascorbate given prior to reperfusion did not show a significant difference in infarct size or ejection fraction. However, it improved the change in ejection fraction determined between 7-15 days and 2-3 months. This result hints at a possible functional effect of ascorbate to ameliorate MRI.
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Affiliation(s)
| | - Roberto Brito
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Jaime González-Montero
- Faculty of Medicine, University of Chile, Santiago, Chile
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Nicolás Valls
- Faculty of Medicine, University of Chile, Santiago, Chile
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Juan G. Gormaz
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Juan C. Prieto
- Faculty of Medicine, University of Chile, Santiago, Chile
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | | | | | | | | | | | - Ramón Rodrigo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
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Mao Y, Wang J, Yu F, Li Z, Li H, Guo C, Fan X. Ghrelin protects against palmitic acid or lipopolysaccharide-induced hepatocyte apoptosis through inhibition of MAPKs/iNOS and restoration of Akt/eNOS pathways. Biomed Pharmacother 2016; 84:305-313. [DOI: 10.1016/j.biopha.2016.09.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 09/12/2016] [Accepted: 09/12/2016] [Indexed: 01/24/2023] Open
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Yang S, Li H, Tang L, Ge G, Ma J, Qiao Z, Liu H, Fang W. Apelin-13 protects the heart against ischemia-reperfusion injury through the RISK-GSK-3β-mPTP pathway. Arch Med Sci 2015; 11:1065-73. [PMID: 26528352 PMCID: PMC4624751 DOI: 10.5114/aoms.2015.54863] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 09/18/2013] [Accepted: 11/28/2013] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION Apelin plays an important role in the protection against myocardial ischemia-reperfusion (I/R) injury, while the mechanism still remains unclear. In the current study, we aimed to evaluate the protective effect of apelin-13, and the main mechanism. MATERIAL AND METHODS The in vivo I/R injury model (Sprague-Dawley rat) was established, then infarct size, expression levels of phospho-protein kinase B (p-Akt), phospho-extracellular signal-regulated kinase (p-ERK) and phospho-glycogen synthase kinase-3β (p-GSK-3β) were measured. The fluorescence intensity of tetramethylrhodamine ethyl ester perchlorate (TMRE) of the isolated myocardial cells was determined to evaluate the opening of the mitochondrial permeability transition pore (mPTP) caused by oxidant stress and hypoxia/reoxygenation. RESULTS For the established I/R injury model, apelin-13 and SB216763 (GSK-3β inhibitor) significantly reduced the infarct size (p < 0.05), which could be abolished by LY294002 (PI3K inhibitor), PD98059 (MEK inhibitor) and atractyloside (mPTP accelerator). The enhanced expression levels of p-Akt, p-ERK and p-GSK-3β caused by apelin-13 (p < 0.05) could be counteracted by LY294002 and PD98059. The reduced fluorescence intensity of TMRE in the H2O2/apelin-13 and H2O2/SB216763 treated groups was significantly lower (p < 0.05), indicating that apelin-13 and SB216763 could reduce the decline in mitochondrial membrane potential caused by oxidant stress, and the fluorescence intensity in the hypoxia/reoxygenation + apelin-13 group was significantly lower (p < 0.05), which suggested that apelin-13 could inhibit the mitochondrial membrane potential changes induced by hypoxia/reoxygenation. CONCLUSIONS The protective mechanism of apelin-13 might be that inactivation of GSK-3β could inhibit the opening of mPTP by activating PI3K/Akt and ERK1/2 involved in the reperfusion injury salvage kinase (RISK) pathway.
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Affiliation(s)
- Shuansuo Yang
- Department of Cardiology, Fengxian Central Hospital, Shanghai, China
| | - Hui Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai, China
| | - Lei Tang
- School of Medical Graduate, Shanghai Jiaotong University, Shanghai, China
| | - Guanghao Ge
- Department of Cardiology, Fengxian Central Hospital, Shanghai, China
| | - Jiangwei Ma
- Department of Cardiology, Fengxian Central Hospital, Shanghai, China
| | - Zengyong Qiao
- Department of Cardiology, Fengxian Central Hospital, Shanghai, China
| | - Huajin Liu
- Department of Cardiology, Fengxian Central Hospital, Shanghai, China
| | - Weiyi Fang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai, China
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Şen LS, Karakoyun B, Yeğen C, Akkiprik M, Yüksel M, Ercan F, Özer A, Yeğen BÇ. Treatment with either obestatin or ghrelin attenuates mesenteric ischemia-reperfusion-induced oxidative injury of the ileum and the remote organ lung. Peptides 2015; 71:8-19. [PMID: 26032330 DOI: 10.1016/j.peptides.2015.04.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/06/2015] [Accepted: 04/14/2015] [Indexed: 12/14/2022]
Abstract
To evaluate the effects of exogenous ghrelin or obestatin on intestinal injury and accompanying pulmonary injury, intestinal ischemia-reperfusion (I/R) was induced in rats by obstructing the superior mesenteric artery for 60min, whereas laparotomy was performed in the sham group. At the beginning of the 90-min reperfusion period, the rats were injected with obestatin (100μg/kg), ghrelin (10ng/kg), or saline intravenously (iv). At the end of reperfusion, the blood, ileum, and lung samples were taken for the histological and biochemical assays. In the saline-treated I/R group, the increased serum interleukin (IL)-1β level, high damage scores, and elevated tissue malondialdehyde level and collagen content in both tissues were significantly reduced by obestatin or ghrelin. Increased ileal myeloperoxidase activity of the saline-treated I/R group was reduced by treatment with obestatin or ghrelin, whereas increased pulmonary myeloperoxidase activity was reduced with administration of obestatin. Increased DNA fragmentation in the ileum of the saline-treated I/R group was reduced by both peptides. Elevated luminol-lucigenin chemiluminescence levels and nuclear factor kappa B (NF-κB) messenger RNA (mRNA) expression in the ileum of the saline-treated-I/R group were significantly decreased by obestatin or ghrelin treatment. I/R-induced depletion of the antioxidant glutathione in both ileal and pulmonary tissues was prevented with either obestatin or ghrelin treatment. Administration of either obestatin or ghrelin exerts similar protective effects against I/R-induced ileal and pulmonary injury, thus warranting further investigation for their possible use against ischemic intestinal injury.
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Affiliation(s)
- Leyla Semiha Şen
- Marmara University School of Medicine, Department of General Surgery, Istanbul, Turkey
| | - Berna Karakoyun
- Marmara University Faculty of Health Sciences, Department of Basic Health Sciences, Istanbul, Turkey
| | - Cumhur Yeğen
- Marmara University School of Medicine, Department of General Surgery, Istanbul, Turkey
| | - Mustafa Akkiprik
- Marmara University School of Medicine, Department of Medical Biology, Istanbul, Turkey
| | - Meral Yüksel
- Marmara University Vocational School of Health Related Professions, Department of Medical Laboratory, Istanbul, Turkey
| | - Feriha Ercan
- Marmara University School of Medicine, Department of Histology and Embryology, Istanbul, Turkey
| | - Ayşe Özer
- Marmara University School of Medicine, Department of Medical Biology, Istanbul, Turkey
| | - Berrak Ç Yeğen
- Marmara University School of Medicine, Department of Physiology, Istanbul, Turkey.
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Stanimirovic J, Obradovic M, Zafirovic S, Resanovic I, Bogdanovic N, Gluvic Z, Mousa SA, Isenovic ER. Effects of altered hepatic lipid metabolism on regulation of hepatic iNOS. ACTA ACUST UNITED AC 2015. [DOI: 10.2217/clp.15.8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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21
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Angelino E, Reano S, Ferrara M, Agosti E, Graziani A, Filigheddu N. Antifibrotic activity of acylated and unacylated ghrelin. Int J Endocrinol 2015; 2015:385682. [PMID: 25960743 PMCID: PMC4415458 DOI: 10.1155/2015/385682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/01/2015] [Indexed: 12/15/2022] Open
Abstract
Fibrosis can affect almost all tissues and organs, it often represents the terminal stage of chronic diseases, and it is regarded as a major health issue for which efficient therapies are needed. Tissue injury, by inducing necrosis/apoptosis, triggers inflammatory response that, in turn, promotes fibroblast activation and pathological deposition of extracellular matrix. Acylated and unacylated ghrelin are the main products of the ghrelin gene. The acylated form, through its receptor GHSR-1a, stimulates appetite and growth hormone (GH) release. Although unacylated ghrelin does not bind or activate GHSR-1a, it shares with the acylated form several biological activities. Ghrelin peptides exhibit anti-inflammatory, antioxidative, and antiapoptotic activities, suggesting that they might represent an efficient approach to prevent or reduce fibrosis. The aim of this review is to summarize the available evidence regarding the effects of acylated and unacylated ghrelin on different pathologies and experimental models in which fibrosis is a predominant characteristic.
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Affiliation(s)
- Elia Angelino
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
| | - Simone Reano
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
| | - Michele Ferrara
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
| | - Emanuela Agosti
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
| | - Andrea Graziani
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
| | - Nicoletta Filigheddu
- Department of Translational Medicine, University of Piemonte Orientale, Via Solaroli 17, 28100 Novara, Italy
- *Nicoletta Filigheddu:
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