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Kumar V, Joshi M, Vats A, Kumar LK, Verma SK, Neeraj, Baithalu RK, Veerappa VG, Singh D, Onteru SK. Mucin and salt combination simulate typical fern-like pattern of buffalo saliva smear at estrus. Microsc Res Tech 2024; 87:1753-1765. [PMID: 38504429 DOI: 10.1002/jemt.24556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 02/18/2024] [Accepted: 03/07/2024] [Indexed: 03/21/2024]
Abstract
Estrus detection in buffaloes primarily relies on behavioral and physiological signs. Especially during summer, these signs are less prominent to recognize. Thus, estrus detection is a pronounced challenge within the realm of buffalo husbandry, particularly in the summer. Therefore, a simple and accurate estrus detection method is required for buffalo farmers. The observation of fern-like salivary crystallization patterns is one such simple method to detect estrus in buffaloes, bactrian camels, beagle bitches, and cows. However, the exact mechanism for the formation of typical fern-like is not known. We hypothesized that it might be because of the estrus-specific mucins and salts. To test this hypothesis, we prepared the smears by combining different concentrations of mucin type -2 (MUC2) and -3 (MUC3) with sodium chloride (NaCl). Microscopic examination confirmed that fern-like patterns resulted from a combination of the MUC3 and NaCl produced more realistic fern patterns than that of MUC2 or BSA with salt. To predict possible mucin and salt concentration showing natural fern-like patterns at the estrus stage in buffalo saliva, we constructed a guide tree of artificially generated fern-like patterns using an image analysis online tool. This computation analysis revealed that most of the natural buffalo estrus saliva samples showing typical fern-like patterns clustered in the cluster 2 of the guide tree comprising of 13 clusters. In the cluster 2, MUC3 in combination with the salt concentrations of 100, 150, and 250 mM was commonly found in a close proximity to the natural typical fern-like patterns of saliva smear of buffaloes at estrus. Conclusively, the buffalo saliva at estrus is predicted to have a gel-forming heavily glycosylated protein such as mucin along with at least 100 mM of NaCl. RESEARCH HIGHLIGHTS: Glycoprotein and salts combination replicates fern-like pattern of buffalo saliva at estrus. MUC3 and NaCl salt combination produces more realistic fern-like patterns compared with MUC2 or BSA and salt combination. MUC3 with NaCl at 100, 150, and 250 mM consistently resembled natural estrus saliva fern-like patterns. During estrus, buffalo saliva is expected to contain heavily glycosylated mucin and at least of 100 mM NaCl.
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Affiliation(s)
- Varun Kumar
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Mansi Joshi
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Ashutosh Vats
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Lal Krishan Kumar
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Surya Kant Verma
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Neeraj
- Animal Reproduction, Gynaecology and Obstetrics, ICAR-National Dairy Research Institute, Karnal, Haryana, India
| | - Rubina Kumari Baithalu
- Animal Reproduction, Gynaecology and Obstetrics, ICAR-National Dairy Research Institute, Karnal, Haryana, India
| | - Vedamurthy Gowdar Veerappa
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Dheer Singh
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Suneel Kumar Onteru
- Molecular Endocrinology, Functional Genomics and Systems Biology Lab, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
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2
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Hosny EN, Sawie HG, Abou-Seif HS, Khadrawy YA. Effect of caffeine-chitosan nanoparticles and α-lipoic acid on the cardiovascular changes induced in rat model of obesity. Int Immunopharmacol 2024; 129:111627. [PMID: 38309094 DOI: 10.1016/j.intimp.2024.111627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 01/19/2024] [Accepted: 01/29/2024] [Indexed: 02/05/2024]
Abstract
The current research aims to study the therapeutic efficacy of alpha-lipoic acid (α-LA) and caffeine-loaded chitosan nanoparticles (Caf-CNs) against cardiovascular complications induced by obesity. Rats were divided randomly into: control, high fat diet (HFD) induced obesity rat model, obese rats treated with α-LA and/or Caf-CNs. Triglycerides (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), very low-density lipoprotein cholesterol (VLDL-C), Interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) as well as activities of lactate dehydrogenase (LDH) and creatine kinase-MB (CK-MB) significantly increased in the serum of obese rats. In addition, plasma atherogenic index, atherogenic coefficient and Castelli's risk indices I and II showed a significant increase. Additionally, levels of malondialdehyde (MDA) and nitric oxide (NO) and activity of monoamine oxidase (MAO) were significantly elevated in heart tissues of obese rats. However, cardiac Na+/K+-ATPase and acetylcholinesterase (AchE) activities and reduced glutathione (GSH), serotonin (5-HT), norepinephrine (NE) and dopamine (DA) as well as serum high-density lipoprotein cholesterol (HDL-C) were significantly reduced in obese rats. Treatment with α-LA and/or Caf-CNs ameliorated almost all the biochemical and histopathological alterations caused by obesity. In conclusion, the present data revealed that α-LA and/or Caf-CNs may be an effective therapeutic approach against cardiac complications caused by obesity through their antilipemic, anti-atherogenic, antioxidant, and anti-inflammatory activities.
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Affiliation(s)
- Eman N Hosny
- Medical Physiology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, Egypt.
| | - Hussein G Sawie
- Medical Physiology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, Egypt
| | - Howida S Abou-Seif
- Medical Physiology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, Egypt
| | - Yasser A Khadrawy
- Medical Physiology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, Egypt
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3
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Dagsuyu E, Koroglu P, Gul IB, Bulan OK, Yanardag R. Oxidative brain and cerebellum injury in diabetes and prostate cancer model: Protective effect of metformin. J Biochem Mol Toxicol 2023; 37:e23440. [PMID: 37354076 DOI: 10.1002/jbt.23440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 05/24/2023] [Accepted: 06/14/2023] [Indexed: 06/26/2023]
Abstract
The body can host the spread of prostate cancer cells. Metastases from prostate cancer are more frequently seen in the brain, liver, lungs, and lymph nodes. A well-known antidiabetic drug, metformin, is also known to have antitumor effects. Our study focuses on the evaluation of potential metformin protective effects on brain and cerebellum damage in streptozotocin (STZ)-induced diabetic and Dunning prostate cancer models. In this investigation, six groups of male Copenhagen rats were created: control, diabetic (D), cancer (C), diabetic + cancer (DC), cancer + metformin, and diabetic + cancer + metformin. The brain and cerebellum tissues of the rats were taken after sacrifice. Oxidative stress markers including reduced glutathione level, lipid peroxidation, glutathione reductase, glutathione peroxidase, glutathione-S-transferase, catalase, superoxide dismutase activities, reactive oxygen species, total oxidant and total antioxidant status, lactate dehydrogenase, xanthine oxidase, acetylcholinesterase activities, protein carbonyl contents, nitric oxide and OH-proline levels, sodium potassium ATPase, carbonic anhydrase, and glucose-6-phosphate dehydrogenase activities; glycoprotein levels including hexose, hexosamine, fucose, and sialic acid levels; and histone deacetylase activity as a cancer marker were determined. Oxidative stress markers were impaired and glycoprotein levels and histone deacetylase activity were increased in the D, C, and DC groups. Metformin therapy reversed these effects. Metformin was found to protect the brain and cerebellum of STZ-induced diabetic rats with Dunning prostate cancer from harm caused by MAT-Lylu metastatic cells.
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Affiliation(s)
- Eda Dagsuyu
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Pınar Koroglu
- Department of Histology and Embryology, Faculty of Medicine, Halic University, Istanbul, Turkey
| | - Ilknur B Gul
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Omur K Bulan
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Refiye Yanardag
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpaşa, Istanbul, Turkey
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Sun HJ, Tan JX, Shan XD, Wang ZC, Wu ZY, Bian JS, Nie XW. DR region of NKAα1 is a target to ameliorate hepatic lipid metabolism disturbance in obese mice. Metabolism 2023; 145:155579. [PMID: 37127227 DOI: 10.1016/j.metabol.2023.155579] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/12/2023] [Accepted: 04/26/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Na+/K+-ATPase (NKA), an ion pumping enzyme ubiquitously expressed in various cells, is critically involved in cellular ion homeostasis and signal transduction. However, the role of NKA in hepatic lipid homeostasis has yet to be fully characterized. METHODS The activity of NKA and NKAα1 expression were determined in steatotic cells, mice and patients. The roles of NKAα1 in hepatosteatosis were detected using hepatocyte knockout or specific overexpression of NKAα1 in mice. RESULTS Herein, we demonstrated that the expression and activity of α1 subunit of NKA (NKAα1) were lowered in the livers of nonalcoholic fatty liver disease (NAFLD) patients, high-fat diet (HFD)-induced obese mice, and genetically obese (ob/ob, db/db) mice, as well as oleic acid-induced hepatocytes. Hepatic deficiency of NKAα1 exacerbated, while adeno-associated virus-mediated liver specific overexpression of NKAα1 alleviated hepatic steatosis through regulation of fatty acid oxidation (FAO) and lipogenesis. Mechanistically, we revealed that NKAα1 upregulated sirtuin 1 (SIRT1) via interacting with ubiquitin specific peptidase 22 (USP22), a deubiquitinating enzyme for the stabilization and deubiquitination of SIRT1, thus activating the downstream autophagy signaling. Blockade of the SIRT1/autophagy signaling pathway eliminated the protective effects of NKAα1 against lipid deposition in hepatocytes. Importantly, we found that an antibody against the DR region (897DVEDSYGQQWTYEQR911) of NKAα1 subunit (DR-Ab) ameliorated hepatic steatosis through maintaining the membrane density of NKAα1 and inducing its activation. CONCLUSIONS Collectively, this study renews the functions of NKAα1 in liver lipid metabolism and provides a new clue for gene therapy or antibody treatment of hepatic lipid metabolism disturbance by targeting NKAα1.
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Affiliation(s)
- Hai-Jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Basic School, Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Jian-Xin Tan
- Lung Transplant Group, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, China
| | - Xiao-Dong Shan
- Department of General Surgery, Affiliated Drum Tower Hospital, Medical School, Nanjing University, Nanjing 210008, China
| | - Zi-Chao Wang
- Department of Basic School, Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Zhi-Yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jin-Song Bian
- Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Xiao-Wei Nie
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Lung Transplant Group, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, China; Shenzhen Key Laboratory of Respiratory Diseases, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital (The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University), Shenzhen 518020, China.
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Obradovic M, Sudar-Milovanovic E, Gluvic Z, Banjac K, Rizzo M, Isenovic ER. The Na +/K +-ATPase: A potential therapeutic target in cardiometabolic diseases. Front Endocrinol (Lausanne) 2023; 14:1150171. [PMID: 36926029 PMCID: PMC10011626 DOI: 10.3389/fendo.2023.1150171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 02/14/2023] [Indexed: 03/08/2023] Open
Abstract
Cardiometabolic diseases (CMD) are a direct consequence of modern living and contribute to the development of multisystem diseases such as cardiovascular diseases and diabetes mellitus (DM). CMD has reached epidemic proportions worldwide. A sodium pump (Na+/K+-ATPase) is found in most eukaryotic cells' membrane and controls many essential cellular functions directly or indirectly. This ion transporter and its isoforms are important in the pathogenesis of some pathological processes, including CMD. The structure and function of Na+/K+-ATPase, its expression and distribution in tissues, and its interactions with known ligands such as cardiotonic steroids and other suspected endogenous regulators are discussed in this review. In addition, we reviewed recent literature data related to the involvement of Na+/K+-ATPase activity dysfunction in CMD, focusing on the Na+/K+-ATPase as a potential therapeutic target in CMD.
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Affiliation(s)
- Milan Obradovic
- Department of Radiobiology and Molecular Genetics, “VINČA“ Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Emina Sudar-Milovanovic
- Department of Radiobiology and Molecular Genetics, “VINČA“ Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Zoran Gluvic
- University Clinical-Hospital Centre Zemun-Belgrade, Clinic of Internal medicine, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Katarina Banjac
- Department of Radiobiology and Molecular Genetics, “VINČA“ Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Manfredi Rizzo
- School of Medicine, Promise Department, University of Palermo, Palermo, Italy
- *Correspondence: Manfredi Rizzo,
| | - Esma R. Isenovic
- Department of Radiobiology and Molecular Genetics, “VINČA“ Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
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Wen XP, Wan QQ. Regulatory effect of insulin on the structure, function and metabolism of Na +/K +-ATPase (Review). Exp Ther Med 2021; 22:1243. [PMID: 34539839 PMCID: PMC8438676 DOI: 10.3892/etm.2021.10678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 08/04/2021] [Indexed: 11/14/2022] Open
Abstract
Na+/K+-ATPase is an ancient enzyme, the role of which is to maintain Na+ and K+ gradients across cell membranes, thus preserving intracellular ion homeostasis. The regulation of Na+/K+-ATPase is affected by several regulatory factors through a number of pathways, with hormones serving important short-term and long-term regulatory functions. Na+/K+-ATPase can also be degraded through activation of the ubiquitin proteasome and autophagy-lysosomal pathways, thereby affecting its abundance and enzymatic activity. As regards the regulatory effect of insulin, it has been found to upregulate the relative abundance of Na+/K+-ATPase and restore the transport efficiency in multiple in vitro and in vivo experiments. Therefore, elucidating the role of insulin in the regulation Na+/K+-ATPase may help uncover new drug targets for the treatment of related diseases. The aim of the present study was to review the structure and function of Na+/K+-ATPase and to discuss the possible mechanisms through which it may be regulated by insulin, in order to investigate the possibility of designing new therapies for related diseases.
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Affiliation(s)
- Xu-Peng Wen
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P.R. China
| | - Qi-Quan Wan
- Transplantation Center, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P.R. China
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7
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Kryvenko V, Vagin O, Dada LA, Sznajder JI, Vadász I. Maturation of the Na,K-ATPase in the Endoplasmic Reticulum in Health and Disease. J Membr Biol 2021; 254:447-457. [PMID: 34114062 PMCID: PMC8192048 DOI: 10.1007/s00232-021-00184-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 05/08/2021] [Indexed: 12/11/2022]
Abstract
Abstract The Na,K-ATPase establishes the electrochemical gradient of cells by driving an active exchange of Na+ and K+ ions while consuming ATP. The minimal functional transporter consists of a catalytic α-subunit and a β-subunit with chaperon activity. The Na,K-ATPase also functions as a cell adhesion molecule and participates in various intracellular signaling pathways. The maturation and trafficking of the Na,K-ATPase include co- and post-translational processing of the enzyme in the endoplasmic reticulum (ER) and the Golgi apparatus and subsequent delivery to the plasma membrane (PM). The ER folding of the enzyme is considered as the rate-limiting step in the membrane delivery of the protein. It has been demonstrated that only assembled Na,K-ATPase α:β-complexes may exit the organelle, whereas unassembled, misfolded or unfolded subunits are retained in the ER and are subsequently degraded. Loss of function of the Na,K-ATPase has been associated with lung, heart, kidney and neurological disorders. Recently, it has been shown that ER dysfunction, in particular, alterations in the homeostasis of the organelle, as well as impaired ER-resident chaperone activity may impede folding of Na,K-ATPase subunits, thus decreasing the abundance and function of the enzyme at the PM. Here, we summarize our current understanding on maturation and subsequent processing of the Na,K-ATPase in the ER under physiological and pathophysiological conditions. Graphic Abstract ![]()
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Affiliation(s)
- Vitalii Kryvenko
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, Klinikstrasse 33, 35392, Giessen, Germany.,The Cardio-Pulmonary Institute (CPI), Giessen, Germany
| | - Olga Vagin
- Department of Physiology, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA.,Veterans Administration Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - Laura A Dada
- Division of Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Jacob I Sznajder
- Division of Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - István Vadász
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, Klinikstrasse 33, 35392, Giessen, Germany. .,The Cardio-Pulmonary Institute (CPI), Giessen, Germany.
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8
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Kryvenko V, Vadász I. Molecular mechanisms of Na,K-ATPase dysregulation driving alveolar epithelial barrier failure in severe COVID-19. Am J Physiol Lung Cell Mol Physiol 2021; 320:L1186-L1193. [PMID: 33689516 PMCID: PMC8238442 DOI: 10.1152/ajplung.00056.2021] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
A significant number of patients with coronavirus disease 2019 (COVID-19) develop acute respiratory distress syndrome (ARDS) that is associated with a poor outcome. The molecular mechanisms driving failure of the alveolar barrier upon severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection remain incompletely understood. The Na,K-ATPase is an adhesion molecule and a plasma membrane transporter that is critically required for proper alveolar epithelial function by both promoting barrier integrity and resolution of excess alveolar fluid, thus enabling appropriate gas exchange. However, numerous SARS-CoV-2-mediated and COVID-19-related signals directly or indirectly impair the function of the Na,K-ATPase, thereby potentially contributing to disease progression. In this Perspective, we highlight some of the putative mechanisms of SARS-CoV-2-driven dysfunction of the Na,K-ATPase, focusing on expression, maturation, and trafficking of the transporter. A therapeutic mean to selectively inhibit the maladaptive signals that impair the Na,K-ATPase upon SARS-CoV-2 infection might be effective in reestablishing the alveolar epithelial barrier and promoting alveolar fluid clearance and thus advantageous in patients with COVID-19-associated ARDS.
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Affiliation(s)
- Vitalii Kryvenko
- Department of Internal Medicine, Justus Liebig University, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany.,The Cardio-Pulmonary Institute (CPI), Giessen, Germany
| | - István Vadász
- Department of Internal Medicine, Justus Liebig University, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany.,The Cardio-Pulmonary Institute (CPI), Giessen, Germany
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9
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Strauss-Kruger M, Kruger R, Smith W, Gafane-Matemane LF, Mokwatsi G, Wei W, Fedorova OV, Schutte AE. The Cardiotonic Steroid Marinobufagenin Is a Predictor of Increased Left Ventricular Mass in Obesity: The African-PREDICT Study. Nutrients 2020; 12:E3185. [PMID: 33081045 PMCID: PMC7603247 DOI: 10.3390/nu12103185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022] Open
Abstract
The endogenous Na+/K+-ATPase inhibitor, marinobufagenin (MBG), strongly associates with salt intake and a greater left ventricular mass index (LVMi) in humans and was shown to promote cardiac fibrosis and hypertrophy in animals. The adverse effects of MBG on cardiac remodeling may be exacerbated with obesity, due to an increased sensitivity of Na+/K+-ATPase to MBG. This study determined whether MBG is related to the change in LVMi over time in adults with a body mass index (BMI) ≥30 kg/m2 (obese) and <30 kg/m2 (non-obese). The study followed 275 healthy participants (aged 20-30 years) from the African-Prospective study on the Early Detection and Identification of Cardiovascular disease and Hypertension (African-PREDICT) study over 4.5 years. At baseline, we measured 24 h urine MBG excretion. MBG levels were positively associated with salt intake. LVMi was determined by two-dimensional echocardiography at baseline and after >4.5 years. With multivariate adjusted analyses in obese adults (N = 56), we found a positive association of follow-up LVMi (Adjusted (Adj.) R2 = 0.35; Std. β = 0.311; p = 0.007) and percentage change in LVMi (Adj. R2 = 0.40; Std. β = 0.336; p = 0.003) with baseline MBG excretion. No association of LVMi (Adj. R2 = 0.37; p = 0.85) or percentage change in LVMi (Adj. R2 = 0.19; p = 0.68) with MBG excretion was evident in normal weight adults (N = 123). These findings suggest that obese adults may be more sensitive to the adverse cardiac effects of MBG and provide new insight into the potential role of dietary salt, by way of MBG, in the pathogenesis of cardiac remodeling in obese individuals.
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Affiliation(s)
- Michél Strauss-Kruger
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
| | - Ruan Kruger
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
- MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom 2520, South Africa
| | - Wayne Smith
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
- MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom 2520, South Africa
| | - Lebo F. Gafane-Matemane
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
- MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom 2520, South Africa
| | - Gontse Mokwatsi
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
- MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom 2520, South Africa
| | - Wen Wei
- National Institute on Aging, NIH, Baltimore, MD 212242, USA; (W.W.); (O.V.F.)
| | - Olga V. Fedorova
- National Institute on Aging, NIH, Baltimore, MD 212242, USA; (W.W.); (O.V.F.)
| | - Aletta E. Schutte
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom 2520, South Africa; (M.S.-K.); (R.K.); (W.S.); (L.F.G.-M.); (G.M.)
- MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom 2520, South Africa
- School of Population Health, University of New South Wales, The George Institute for Global Health, Sydney 2052, Australia
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Sun HJ, Cao L, Zhu MY, Wu ZY, Shen CY, Nie XW, Bian JS. DR-region of Na +/K +-ATPase is a target to ameliorate hepatic insulin resistance in obese diabetic mice. Theranostics 2020; 10:6149-6166. [PMID: 32483445 PMCID: PMC7255017 DOI: 10.7150/thno.46053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 04/22/2020] [Indexed: 01/12/2023] Open
Abstract
Reduced hepatic Na+/K+-ATPase (NKA) activity and NKAα1 expression are engaged in the pathologies of metabolism diseases. The present study was designed to investigate the potential roles of NKAα1 in hepatic gluconeogenesis and glycogenesis in both hepatocytes and obese diabetic mice. Methods: Insulin resistance was mimicked by glucosamine (GlcN) in either human hepatocellular carcinoma (HepG2) cells or primary mouse primary hepatocytes. Obese diabetic mice were induced by high-fat diet (HFD) feeding for 12 weeks. Results: We found that both NKA activity and NKAα1 protein level were downregulated in GlcN-treated hepatocytes and in the livers of obese diabetic mice. Pharmacological inhibition of NKA with ouabain worsened, while activation of NKAα1 with an antibody against an extracellular DR region of NKAα1 subunit (DR-Ab) prevented GlcN-induced increase in gluconeogenesis and decrease in glycogenesis. Likewise, the above results were also corroborated by the opposite effects of genetic knockout/overexpression of NKAα1 on both gluconeogenesis and glycogenesis. In obese diabetic mice, hepatic activation or overexpression of NKAα1 stimulated the PI3K/Akt pathway to suppress hyperglycemia and improve insulin resistance. More importantly, loss of NKA activities in NKAα1+/- mice was associated with more susceptibility to insulin resistance following HFD feeding. Conclusions: Our findings suggest that NKAα1 is a physiological regulator of glucose homoeostasis and its DR-region is a novel target to treat hepatic insulin resistance.
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Surowka AD, Ziomber A, Czyzycki M, Migliori A, Kasper K, Szczerbowska-Boruchowska M. Molecular and elemental effects underlying the biochemical action of transcranial direct current stimulation (tDCS) in appetite control. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 195:199-209. [PMID: 29414579 DOI: 10.1016/j.saa.2018.01.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 01/18/2018] [Accepted: 01/23/2018] [Indexed: 06/08/2023]
Abstract
Recent studies highlight that obesity may alter the electric activity in brain areas triggering appetite and craving. Transcranial direct current brain stimulation (tDCS) has recently emerged as a safe alternative for treating food addiction via modulating cortical excitability without any high-risk surgical procedure to be utilized. As for anodal-type tDCS (atDCS), we observe increased excitability and spontaneous firing of the cortical neurons, whilst for the cathodal-type tDCS (ctDCS) a significant decrease is induced. Unfortunately, for the method to be fully used in a clinical setting, its biochemical action mechanism must be precisely defined, although it is proposed that molecular remodelling processes play in concert with brain activity changes involving the ions of: Na, Cl, K and Ca. Herein, we proposed for the first time Fourier transform infrared (FTIR) and synchrotron X-ray fluorescence (SRXRF) microprobes for a combined molecular and elemental analysis in the brain areas implicated appetite control, upon experimental treatment by either atDCS or ctDCS. The study, although preliminary, shows that by stimulating the prefrontal cortex in the rats fed high-caloric nutrients, the feeding behavior can be significantly changed, resulting in significantly inhibited appetite. Both, atDCS and ctDCS produced significant molecular changes involving qualitative and structural properties of lipids, whereas atDCS was found with a somewhat more significant effect on protein secondary structure in all the brain areas investigated. Also, tDCS was reported to reduce surface masses of Na, Cl, K, and Ca in almost all brain areas investigated, although the atDCS deemed to have a stronger neuro-modulating effect. Taken together, one can report that tDCS is an effective treatment technique, and its action mechanism in the appetite control seems to involve a variety of lipid-, protein- and metal/non-metal-ion-driven biochemical changes, regardless the current polarization.
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Affiliation(s)
- Artur D Surowka
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland.
| | - Agata Ziomber
- Jagiellonian University, Faculty of Medicine, Krakow, Poland
| | - Mateusz Czyzycki
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland; Elettra Sincrotrone Trieste, Basovizza, Trieste, Italy; International Atomic Energy Agency, Nuclear Science and Instrumentation Laboratory, Seibersdorf, Austria
| | - Alessandro Migliori
- International Atomic Energy Agency, Nuclear Science and Instrumentation Laboratory, Seibersdorf, Austria
| | - Kaja Kasper
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland
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Xiao J, Zhang X, Fu C, Yang Q, Xie Y, Zhang Z, Ye Z. Impaired Na +-K +-ATPase signaling in renal proximal tubule contributes to hyperuricemia-induced renal tubular injury. Exp Mol Med 2018; 50:e452. [PMID: 29497172 PMCID: PMC5898891 DOI: 10.1038/emm.2017.287] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 09/11/2017] [Accepted: 09/26/2017] [Indexed: 12/27/2022] Open
Abstract
Hyperuricemia contributes to renal inflammation. We aimed to investigate the role of Na+–K+–ATPase (NKA) in hyperuricemia-induced renal tubular injury. Human primary proximal tubular epithelial cells (PTECs) were incubated with uric acid (UA) at increasing doses or for increasing lengths of time. PTECs were then stimulated by pre-incubation with an NKA α1 expression vector or small interfering RNA before UA (100 μg ml−1, 48 h) stimulation. Hyperuricemic rats were induced by gastric oxonic acid and treated with febuxostat (Feb). ATP levels, the activity of NKA and expression of its α1 subunit, Src, NOD-like receptor pyrin domain-containing protein 3 (NLRP3) and interleukin 1β (IL-1β) were measured both in vitro and in vivo. Beginning at concentrations of 100 μg ml−1, UA started to dose-dependently reduce NKA activity. UA at a concentration of 100 μg ml−1 time-dependently affected the NKA activity, with the maximal increased NKA activity at 24 h, but the activity started to decrease after 48 h. This inhibitory effect of UA on NKA activity at 48 h was in addition to a decrease in NKA α1 expression in the cell membrane, but an increase in lysosomes. This process also involved the subsequent activation of Src kinase and NLRP3, promoting IL-1β processing. In hyperuricemic rats, renal cortex NKA activity and its α1 expression were upregulated at the 7th week and both decreased at the 10th week, accompanied with increased renal cortex expression of Src, NLRP3 and IL-1β. The UA levels were reduced and renal tubular injuries in hyperuricemic rats were alleviated in the Feb group. Our data suggested that the impairment of NKA and its consequent regulation of Src, NLRP3 and IL-1β in the renal proximal tubule contributed to hyperuricemia-induced renal tubular injury.
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Affiliation(s)
- Jing Xiao
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Xiaoli Zhang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Chensheng Fu
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Qingmei Yang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Ying Xie
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Zhenxing Zhang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Zhibin Ye
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
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13
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Sodium consumption and its association with serum leptin in volunteers without cardiovascular disease. Proc Nutr Soc 2018. [DOI: 10.1017/s0029665118000769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Yu L, Yang J, Wang X, Jiang B, Sun Y, Ji Y. Antioxidant and antitumor activities of Capparis spinosa L. and the related mechanisms. Oncol Rep 2016; 37:357-367. [DOI: 10.3892/or.2016.5249] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 06/25/2016] [Indexed: 11/05/2022] Open
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15
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Saliva ferning, an unorthodox estrus detection method in water buffaloes (Bubalus bubalis). Theriogenology 2016; 86:1147-55. [DOI: 10.1016/j.theriogenology.2016.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 11/19/2022]
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16
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Chapter Five - Ubiquitination of Ion Channels and Transporters. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2016; 141:161-223. [DOI: 10.1016/bs.pmbts.2016.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Obradovic M, Zafirovic S, Jovanovic A, Milovanovic ES, Mousa SA, Labudovic-Borovic M, Isenovic ER. Effects of 17β-estradiol on cardiac Na(+)/K(+)-ATPase in high fat diet fed rats. Mol Cell Endocrinol 2015; 416:46-56. [PMID: 26284496 DOI: 10.1016/j.mce.2015.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/28/2015] [Accepted: 08/14/2015] [Indexed: 01/04/2023]
Abstract
The aim of this study was to investigate in vivo effects of estradiol on Na(+)/K(+)-ATPase activity/expression in high fat (HF) diet fed rats. Adult male Wistar rats were fed normally (Control, n = 7) or with a HF diet (Obese, n = 14) for 10 weeks. After 10 weeks, half of the obese rats were treated with estradiol (Obese + Estradiol, n = 7, 40 μg/kg, i.p.) as a bolus injection and 24 h after treatment all the rats were sacrificed. Estradiol in vivo in obese rats in comparison with obese non-treated rats led to a statistically significant increase in concentration of serum Na(+) (p < 0.05), Na(+)/K(+)-ATPase activity (p < 0.01), expression of α1 (p < 0.01) and α2 (p < 0.05) subunit of Na(+)/K(+)-ATPase, both PI3K subunits p85 (p < 0.01), p110 (p < 0.05), and association of IRS-1 with p85 (p < 0.05), while significantly decrease expression of AT1 (p < 0.05) and Rho A (p < 0.01) proteins. Our results suggest that estradiol in vivo in pathophysiological conditions, such as obesity accompanied with insulin resistance stimulates activity and expression of Na(+)/K(+)-ATPase by a mechanism that involves the participation of IRS-1/PI3K/Akt signaling. In addition, the decreasing level of AT1 and Rho A proteins estradiol probably attenuates the detrimental effect of obesity to decreased IRS-1/PI3K association and consequently reduce Na(+)/K(+)-ATPase activity/expression.
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Affiliation(s)
- Milan Obradovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Sonja Zafirovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Aleksandra Jovanovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Emina Sudar Milovanovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Shaker A Mousa
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, 1 Discovery Drive, Rensselaer, NY 12144, USA.
| | - Milica Labudovic-Borovic
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
| | - Esma R Isenovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
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18
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Rueda-Clausen CF, Ogunleye AA, Sharma AM. Health Benefits of Long-Term Weight-Loss Maintenance. Annu Rev Nutr 2015; 35:475-516. [DOI: 10.1146/annurev-nutr-071714-034434] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christian F. Rueda-Clausen
- Obesity Research & Management, Clinical Research Unit, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada; , ,
| | - Ayodele A. Ogunleye
- Obesity Research & Management, Clinical Research Unit, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada; , ,
| | - Arya M. Sharma
- Obesity Research & Management, Clinical Research Unit, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada; , ,
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Kaločayová B, Mézešová L, Barteková M, Vlkovičová J, Jendruchová V, Vrbjar N. Effect of duration of diabetes mellitus type 1 on properties of Na, K-ATPase in cerebral cortex. Mol Cell Biochem 2015; 405:41-52. [DOI: 10.1007/s11010-015-2394-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 03/27/2015] [Indexed: 01/28/2023]
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20
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Obradovic M, Stewart AJ, Pitt SJ, Labudovic-Borovic M, Sudar E, Petrovic V, Zafirovic S, Maravic-Stojkovic V, Vasic V, Isenovic ER. In vivo effects of 17β-estradiol on cardiac Na(+)/K(+)-ATPase expression and activity in rat heart. Mol Cell Endocrinol 2014; 388:58-68. [PMID: 24662727 DOI: 10.1016/j.mce.2014.03.005] [Citation(s) in RCA: 23] [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: 11/30/2013] [Revised: 03/15/2014] [Accepted: 03/15/2014] [Indexed: 12/24/2022]
Abstract
In this study the in vivo effects of estradiol in regulating Na(+)/K(+)-ATPase function in rat heart was studied. Adult male Wistar rats were treated with estradiol (40μg/kg, i.p.) and after 24h the animals were sacrificed and the heart excised. Following estradiol administration, cardiac Na(+)/K(+)-ATPase activity, expression of the α1 subunit, and phosphorylation of the α1 subunit were significantly increased. These animals also had significantly decreased levels of digoxin-like immunoreactive factor(s). Na(+) levels were also significantly reduced but to a level that was still within the normal physiological range, highlighting the ability of the Na(+)/K(+)-ATPase to balance the ionic composition following treatment with estradiol. Estradiol treated rats also showed increased phosphorylation of protein kinase B (Akt), and extracellular-signal-regulated kinase 1/2 (ERK1/2). We therefore suggest a role for Akt and/or ERK1/2 in estradiol-mediated regulation of cardiac Na(+)/K(+)-ATPase expression and activity in rat heart.
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Affiliation(s)
- Milan Obradovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Alan J Stewart
- School of Medicine, University of St Andrews, North Haugh, St Andrews KY16 9TF, United Kingdom.
| | - Samantha J Pitt
- School of Medicine, University of St Andrews, North Haugh, St Andrews KY16 9TF, United Kingdom.
| | - Milica Labudovic-Borovic
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", Faculty of Medicine, University of Belgrade, Visegradska 26, 11000 Belgrade, Serbia.
| | - Emina Sudar
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Voin Petrovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Physical Chemistry, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Sonja Zafirovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Vera Maravic-Stojkovic
- Dedinje Cardiovascular Institute, Belgrade University, School of Medicine, Heroja Milana Tepica 1, 11000 Belgrade, Serbia.
| | - Vesna Vasic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Physical Chemistry, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
| | - Esma R Isenovic
- Institute of Nuclear Sciences Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Mike Petrovica Alasa 12-14, 11000 Belgrade, Serbia.
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Obradovic M, Sudar E, Zafirovic S, Stanimirovic J, Labudovic-Borovic M, Isenovic ER. Estradiol In Vivo Induces Changes in Cardiomyocytes Size in Obese Rats. Angiology 2013; 66:25-35. [DOI: 10.1177/0003319713514477] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We studied the in vivo effects of estradiol on size and biochemical parameters of cardiomyocytes in pathophysiological conditions such as obesity and insulin resistance. Male Wistar rats were normally fed (controls, n = 7) or fed with high-fat diet (obese, n = 14). Half of the obese rats (obese + estradiol, n = 7) were treated with a single dose of estradiol (40 μg/kg, intraperitoneally) and 24 hours after treatment all the rats were killed. Estradiol in vivo in obese rats resulted in a significant increase in protein kinase B (Akt) activation ( P < .05) and decrease in heart mass ( P < .05), ratio of the heart mass/body mass ( P < .05), transverse diameters of cardiomyocytes ( P < .001), concentration of serum high-sensitivity C-reactive protein ( P < .001), and total cholesterol ( P < .01) compared with obese nontreated rats. Our results suggest that estradiol in obese/IR rats affects the size of cardiomyocytes and its actions lead in vivo to a reduction in obesity-induced cardiac hypertrophy, via Akt.
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Affiliation(s)
- Milan Obradovic
- Institute Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Emina Sudar
- Institute Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Sonja Zafirovic
- Institute Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Julijana Stanimirovic
- Institute Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Milica Labudovic-Borovic
- Institute of Histology and Embryology “Aleksandar Ð. Kostić”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Esma R. Isenovic
- Institute Vinca, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
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