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Ozaydin D, Kuru Bektaşoğlu P, Türe D, Bozkurt H, Ergüder Bİ, Sargon MF, Arıkök AT, Kertmen H, Gürer B. Mildronate Has Ameliorative Effects on the Experimental Ischemia/Reperfusion Injury Model in the Rabbit Spinal Cord. World Neurosurg 2023; 173:e717-e726. [PMID: 36889637 DOI: 10.1016/j.wneu.2023.02.139] [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: 11/29/2022] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/09/2023]
Abstract
BACKGROUND Mildronate is a useful anti-ischemic agent and has antiinflammatory, antioxidant, and neuroprotective activities. The aim of this study is to investigate the potential neuroprotective effects of mildronate in the experimental rabbit spinal cord ischemia/reperfusion injury (SCIRI) model. METHODS Rabbits were randomized into 5 groups of 8 animals as groups 1 (control), 2 (ischemia), 3 (vehicle), 4 (30 mg/kg methylprednisolone [MP]), and 5 (100 mg/kg mildronate). The control group underwent only laparotomy. The other groups have the spinal cord ischemia model by a 20-minute aortic occlusion just caudal to the renal artery. The malondialdehyde and catalase levels and caspase-3, myeloperoxidase, and xanthine oxidase activities were investigated. Neurologic, histopathologic, and ultrastructural evaluations were also performed. RESULTS The serum and tissue myeloperoxidase, malondialdehyde, and caspase-3 values of the ischemia and vehicle groups were statistically significantly higher than those of the MP and mildronate groups (P < 0.001). Serum and tissue catalase values of the ischemia and vehicle groups were statistically significantly lower than those of the control, MP, and mildronate groups (P < 0.001). The histopathologic evaluation showed a statistically significantly lower score in the mildronate and MP groups than in the ischemia and vehicle groups (P < 0.001). The modified Tarlov scores of the ischemia and vehicle groups were statistically significantly lower than those of the control, MP, and mildronate groups (P < 0.001). CONCLUSIONS This study presented the antiinflammatory, antioxidant, antiapoptotic, and neuroprotective effects of mildronate on SCIRI. Future studies will elucidate its possible use in clinical settings in SCIRI.
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Affiliation(s)
- Dilan Ozaydin
- Department of Neurosurgery, Kartal Dr. Lutfi Kırdar Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | | | - Durukan Türe
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Toros University, Mersin, Turkey
| | - Hüseyin Bozkurt
- Department of Neurosurgery, Dışkapı Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - Berrin İmge Ergüder
- Ankara University School of Medicine, Department of Biochemistry, Ankara, Turkey
| | - Mustafa Fevzi Sargon
- Lokman Hekim University School of Medicine, Department of Anatomy, Ankara, Turkey
| | - Ata Türker Arıkök
- University of Health Sciences, Dışkapı Education and Research Hospital, Department of Pathology, Ankara, Turkey
| | - Hayri Kertmen
- Department of Neurosurgery, Dışkapı Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - Bora Gürer
- Istinye University Faculty of Medicine, Department of Neurosurgery, Istanbul, Turkey
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Lu C, Guo X, He X, Chang Y, Zheng F, Xu C, Zhang S, Zhou Y, Li J. Cardioprotective effects of Sinomenine in myocardial ischemia/reperfusion injury in a rat model. Saudi Pharm J 2022; 30:669-678. [PMID: 35812144 PMCID: PMC9257858 DOI: 10.1016/j.jsps.2022.04.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/03/2022] [Indexed: 02/08/2023] Open
Abstract
Background Ischemia reperfusion (I/R) play an imperative role in the expansion of cardiovascular disease. Sinomenine (SM) has been exhibited to possess antioxidant, anticancer, anti-inflammatory, antiviral and anticarcinogenic properties. The aim of the study was scrutinized the cardioprotective effect of SM against I/R injury in rat. Methods Rat were randomly divided into normal control (NC), I/R control and I/R + SM (5, 10 and 20 mg/kg), respectively. Ventricular arrhythmias, body weight and heart weight were estimated. Antioxidant, inflammatory cytokines, inflammatory mediators and plasmin system indicator were accessed. Results Pre-treated SM group rats exhibited the reduction in the duration and incidence of ventricular fibrillation, ventricular ectopic beat (VEB) and ventricular tachycardia along with suppression of arrhythmia score during the ischemia (30 and 120 min). SM treated rats significantly (P < 0.001) altered the level of antioxidant parameters. SM treatment significantly (P < 0.001) repressed the level of creatine kinase MB (CK-MB), creatine kinase (CK) and troponin I (Tnl). SM treated rats significantly (P < 0.001) repressed the tissue factor (TF), thromboxane B2 (TXB2), plasminogen activator inhibitor 1 (PAI-1) and plasma fibrinogen (Fbg) and inflammatory cytokines and inflammatory mediators. Conclusion Our result clearly indicated that SM plays anti-arrhythmia effect in I/R injury in the rats via alteration of oxidative stress and inflammatory reaction.
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Yi HS. The Role of Carnitine Orotate Complex in Fatty Liver. Diabetes Metab J 2021; 45:866-867. [PMID: 34847643 PMCID: PMC8640160 DOI: 10.4093/dmj.2021.0272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Hyon-Seung Yi
- Laboratory of Endocrinology and Immune System, Chungnam National University College of Medicine, Daejeon, Korea
- Corresponding author: Hyon-Seung Yi https://orcid.org/0000-0002-3767-1954 Laboratory of Endocrinology and Immune System, Chungnam National University College of Medicine, 282 Munhwa-ro, Jung-gu, Daejeon 35015, Korea E-mail:
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Savic D, Ball V, Holzner L, Hauton D, Timm KN, Curtis MK, Heather LC, Tyler DJ. Hyperpolarized magnetic resonance shows that the anti-ischemic drug meldonium leads to increased flux through pyruvate dehydrogenase in vivo resulting in improved post-ischemic function in the diabetic heart. NMR IN BIOMEDICINE 2021; 34:e4471. [PMID: 33458907 PMCID: PMC8609426 DOI: 10.1002/nbm.4471] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/20/2020] [Accepted: 12/20/2020] [Indexed: 05/07/2023]
Abstract
The diabetic heart has a decreased ability to metabolize glucose. The anti-ischemic drug meldonium may provide a route to counteract this by reducing l-carnitine levels, resulting in improved cardiac glucose utilization. Therefore, the aim of this study was to use the novel technique of hyperpolarized magnetic resonance to investigate the in vivo effects of treatment with meldonium on cardiac metabolism and function in control and diabetic rats. Thirty-six male Wistar rats were injected either with vehicle, or with streptozotocin (55 mg/kg) to induce a model of type 1 diabetes. Daily treatment with either saline or meldonium (100 mg/kg/day) was undertaken for three weeks. in vivo cardiac function and metabolism were assessed with CINE MRI and hyperpolarized magnetic resonance respectively. Isolated perfused hearts were challenged with low-flow ischemia/reperfusion to assess the impact of meldonium on post-ischemic recovery. Meldonium had no significant effect on blood glucose concentrations or on baseline cardiac function. However, hyperpolarized magnetic resonance revealed that meldonium treatment elevated pyruvate dehydrogenase flux by 3.1-fold and 1.2-fold in diabetic and control animals, respectively, suggesting an increase in cardiac glucose oxidation. Hyperpolarized magnetic resonance further demonstrated that meldonium reduced the normalized acetylcarnitine signal by 2.1-fold in both diabetic and control animals. The increase in pyruvate dehydrogenase flux in vivo was accompanied by an improvement in post-ischemic function ex vivo, as meldonium elevated the rate pressure product by 1.3-fold and 1.5-fold in the control and diabetic animals, respectively. In conclusion, meldonium improves in vivo pyruvate dehydrogenase flux in the diabetic heart, contributing to improved cardiac recovery after ischemia.
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Affiliation(s)
- Dragana Savic
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
- Oxford Centre for Clinical Magnetic Resonance Research (OCMR), Division of Cardiovascular Medicine, Radcliffe Department of MedicineUniversity of OxfordOxfordUK
| | - Vicky Ball
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
| | - Lorenz Holzner
- Department of Physiology, Development and NeuroscienceUniversity of CambridgeCambridgeUK
| | - David Hauton
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
- Metabolomics Research Group, Department of ChemistryUniversity of OxfordOxfordUK
| | - Kerstin N. Timm
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
| | - M. Kate Curtis
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
| | - Lisa C. Heather
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
| | - Damian J. Tyler
- Cardiac Metabolism Research Group (CMRG), Department of Physiology, Anatomy and GeneticsUniversity of OxfordOxfordUK
- Oxford Centre for Clinical Magnetic Resonance Research (OCMR), Division of Cardiovascular Medicine, Radcliffe Department of MedicineUniversity of OxfordOxfordUK
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Jargin SV. Scientific Papers and Patents on Substances with Unproven Effects. ACTA ACUST UNITED AC 2020; 13:37-45. [PMID: 30848224 DOI: 10.2174/1872211313666190307162041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/26/2019] [Accepted: 02/26/2019] [Indexed: 01/22/2023]
Abstract
It is evident from reviewing scientific literature that the quality of argumentation in some areas of medical research has deteriorated during the last decades. Publication of a series of questionable reliability has continued without making references to the published criticism; examples are discussed in this review. Another tendency is that drugs without proven efficiency are advertised, corresponding products patented and marketed as evidence-based medications. Professional publications are required to register drugs and dietary supplements to obtain permissions for the practical use; and such papers appeared, sometimes being of questionable reliability. Several examples are discussed in this review when substances without proven effects were patented and introduced into practice being supported by publications of questionable reliability. Some of the topics are not entirely clear; and the arguments provided here can induce a constructive discussion.
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Affiliation(s)
- Sergei V Jargin
- Peoples' Friendship University of Russia, Clementovski per 6-82, 115184 Moscow, Russian Federation
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USE OF MELDONIUM IN THE TREATMENT OF PATIENTS WITH CORONARY ARTERY DISEASE AND CONCOMITANT ARTERIAL HYPERTENSION. EUREKA: HEALTH SCIENCES 2019. [DOI: 10.21303/2504-5679.2019.001018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Coronary artery disease (CAD) remains one of the leading causes of mortality and disability in Ukraine. Arterial hypertension (AH) is one of the most common diseases and a leading risk factor for coronary artery disease.
The aim of the work is to evaluate the antianginal activity of meldonium in the complex therapy in patients with CAD with stable angina and concomitant AH.
Materials and methods. The study included 82 patients with CAD, stable angina pectoris II–III functional class, including 52 patients with concomitant AH stage II. The patients were divided into 2 groups. Patients in group 1 were prescribed meldonium at a dose of 750 mg/d for 2 months in addition to basic therapy for the underlying disease. Patients in group 2 continued basic antianginal, disaggregant, hypolipidemic therapy.
Results. The use of meldonium led to a decrease in the frequency of angina attacks and the need for nitroglycerin. From the 1st month of therapy and up to 2 months treatment decreased it consumption by 63 and 82.3 % respectively. Adding meldonium to basic therapy led to a likely reduction in shortness of breath, episodes of palpitations, tinnitus, and headache. In all patients, after the treatment, an increase in exercise tolerance was observed, which was more pronounced in the group where patients were receiving meldonium. In the group of patients receiving meldonium, normalisation of blood pressure was faster and more pronounced.
Conclusions. Meldonium has antianginal activity, which is manifested by an increase in the physical tolerance of patients, a decrease in the frequency of angina attacks, the need for sublingual nitroglycerin intake and improvement in the well-being of patients. Additional use of meldonium promotes faster and better normalization of blood pressure. The use of meldonium in the complex therapy of patients with stable angina and concomitant AH allows to increase the effectiveness of traditional antianginal therapy and to improve the quality of life of such patients.
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Islam MM, Bhanja P, Halder M, Das A, Bhaumik A, Islam SM. Chiral Cr(III)-salen complex embedded over sulfonic acid functionalized mesoporous SBA-15 material as an efficient catalyst for the asymmetric Henry reaction. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110489] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Demir D, Kuru Bektaşoğlu P, Koyuncuoğlu T, Kandemir C, Akakın D, Yüksel M, Çelikoğlu E, Yeğen BÇ, Gürer B. Neuroprotective effects of mildronate in a rat model of traumatic brain injury. Injury 2019; 50:1586-1592. [PMID: 31481152 DOI: 10.1016/j.injury.2019.08.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 08/19/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Traumatic brain injury (TBI) is one of the most common preventable causes of mortality and morbidity. Inflammation, apoptosis, oxidative stress, and ischemia are some of the important pathophysiological mechanisms underlying neuronal loss after TBI. Mildronate is demonstrated to be beneficial in various experimental models of ischemic diseases via anti-inflammatory, antioxidant, and neuroprotective mechanisms. This study aimed to investigate possible antioxidant, anti-inflammatory, antiapoptotic, and neuroprotective effects of mildronate in a rat model of TBI. METHODS A total of 46 male rats were divided into three groups of control, saline-treated TBI, and mildronate-treated TBI. Both TBI groups were subjected to closed-head contusive weight-drop injuries followed by treatment with saline or mildronate (100 mg/kg) administered intraperitoneally. The forebrain was removed 24 h after trauma induction, the activities of myeloperoxidase (MPO) and caspase-3, levels of superoxide dismutase (SOD), luminol- and lucigenin-enhanced chemiluminescence were measured, and histomorphological evaluation of cerebral tissues was performed. RESULTS Increased MPO and caspase-3 activities in the vehicle-treated TBI group (p < 0.001) were suppressed in the mildronate-treated TBI group (p < 0.001). Similarly, increase in luminol and lucigenin levels (p < 0.001 and p < 0.01, respectively) in the vehicle-treated TBI group were decreased in the mildronate-treated TBI group (p < 0.001). Concomitantly, in the vehicle-treated TBI group, TBI-induced decrease in SOD activity (p < 0.01) was reversed with mildronate treatment (p < 0.05). On histopathological examination, TBI-induced damage in the cerebral cortex was lesser in the mildronate-treated TBI group than that in other groups. CONCLUSION This study revealed for the first time that mildronate, exhibits neuroprotective effects against TBI because of its anti-inflammatory, antiapoptotic, and antioxidant activities.
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Affiliation(s)
- Dilan Demir
- Department of Neurosurgery, University of Health Sciences, Istanbul Dr. Lutfi Kirdar Kartal Education and Research Hospital, Istanbul, Turkey
| | - Pınar Kuru Bektaşoğlu
- Department of Neurosurgery, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey; Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey.
| | - Türkan Koyuncuoğlu
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| | - Cansu Kandemir
- Department of Histology, Marmara University School of Medicine, Istanbul, Turkey
| | - Dilek Akakın
- Department of Histology, Marmara University School of Medicine, Istanbul, Turkey
| | - Meral Yüksel
- Department of Medical Laboratory, Marmara University Vocational School of Health Related Services, Istanbul, Turkey
| | - Erhan Çelikoğlu
- Department of Neurosurgery, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
| | - Berrak Ç Yeğen
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| | - Bora Gürer
- Department of Neurosurgery, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
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Halder M, Bhanja P, Islam MM, Bhaumik A, Islam SM. Chiral copper-salen complex grafted over functionalized mesoporous silica as an efficient catalyst for asymmetric Henry reactions and synthesis of the potent drug (R)-isoproterenol. NEW J CHEM 2018. [DOI: 10.1039/c8nj01745j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new chiral Cu(ii)@AFS-1 catalyzed asymmetric Henry reaction (ee = 94%, yield 96%) and diastereoselective Henry reaction have been reported. Additionally, drug (R)-(−)-isoproterenol was synthesized using this protocol.
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Affiliation(s)
- Mita Halder
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Piyali Bhanja
- Department of Materials Science Indian Association for the Cultivation of Science 2A & B
- Kolkata 700032
- India
| | | | - Asim Bhaumik
- Department of Materials Science Indian Association for the Cultivation of Science 2A & B
- Kolkata 700032
- India
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Advances in the Understanding and Treatment of Mitochondrial Fatty Acid Oxidation Disorders. CURRENT GENETIC MEDICINE REPORTS 2017; 5:132-142. [PMID: 29177110 DOI: 10.1007/s40142-017-0125-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Purpose of review This review focuses on advances made in the past three years with regards to understanding the mitochondrial fatty acid oxidation (FAO) pathway, the pathophysiological ramifications of genetic lesions in FAO enzymes, and emerging therapies for FAO disorders. Recent findings FAO has now been recognized to play a key energetic role in pulmonary surfactant synthesis, T-cell differentiation and memory, and the response of the proximal tubule to kidney injury. Patients with FAO disorders may face defects in these cellular systems as they age. Aspirin, statins, and nutritional supplements modulate the rate of FAO under normal conditions and could be risk factors for triggering symptoms in patients with FAO disorders. Patients have been identified with mutations in the ACAD9 and ECHS1 genes, which may represent new FAO disorders. New interventions for long-chain FAODs are in clinical trials. Finally, post-translational modifications that regulate fatty acid oxidation protein activities have been characterized that represent important new therapeutic targets. Summary Recent research has led to a deeper understanding of FAO. New therapeutic avenues are being pursued that may ultimately cause a paradigm shift for patient care.
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Kumar N, Devineni SR, Gajjala PR, Dubey SK, Kumar P. Synthesis, isolation, identification and characterization of new process-related impurity in isoproterenol hydrochloride by HPLC, LC/ESI-MS and NMR. J Pharm Anal 2017; 7:394-400. [PMID: 29404065 PMCID: PMC5790752 DOI: 10.1016/j.jpha.2017.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 05/08/2017] [Accepted: 05/09/2017] [Indexed: 11/30/2022] Open
Abstract
One unknown impurity (Imp-II) during the analysis of laboratory batches of isoproterenol hydrochloride was detected in the level ranging from 0.04% to 0.12% by high performance liquid chromatography with UV detection. The unknown impurity structure was proposed as 4-[2-(propan-2-ylamino)ethyl]benzene-1,2-diol (Imp-II) using the liquid chromatography--mass spectrophotometry (LC--MS) analysis. Imp-II was isolated by semi-preparative liquid chromatography from the impurity-enriched reaction crude sample. Its proposed structure was confirmed by nuclear magnetic spectroscopy such as 1H, 13C, DEPT (1D NMR), HSQC (2D NMR) and infrared spectroscopy (IR), and retention time and purity with HPLC followed by the chemical synthesis. Due to less removable nature of Imp-II during the purification, the synthetic process was optimized proficiently to control the formation of Imp-II below to the limit<0.12% in the course of reaction. The new chemical route was developed for the preparation of this impurity in required quantity with purity to use as reference standard. The most probable mechanism for the formation of Imp-II was discussed in details.
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Affiliation(s)
- Neeraj Kumar
- Chemical Research Department, Micro Labs Ltd, API Division, Bommasandra-Jigani Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Subba Rao Devineni
- Chemical Research Department, Micro Labs Ltd, API Division, Bommasandra-Jigani Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Prasad Reddy Gajjala
- Chemical Research Department, Micro Labs Ltd, API Division, Bommasandra-Jigani Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Shailendra Kumar Dubey
- Chemical Research Department, Micro Labs Ltd, API Division, Bommasandra-Jigani Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
| | - Pramod Kumar
- Chemical Research Department, Micro Labs Ltd, API Division, Bommasandra-Jigani Link Road, KIADB INDL Area, Bommasandra, Bangalore 560105, Karnataka, India
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Löffler M, Carrey EA, Zameitat E. Orotate (orotic acid): An essential and versatile molecule. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2017; 35:566-577. [PMID: 27906623 DOI: 10.1080/15257770.2016.1147580] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Orotate (OA) is well-known as a precursor in biosynthesis of pyrimidines; in mammals it is released from the mitochondrial dihydroorotate dehydrogenase (DHODH) for conversion to UMP by the cytoplasmic UMP synthase enzyme. OA is also a normal part of the diet, being found in milk and dairy products, and it is converted to uridine for use in the pyrimidine salvage pathway predominantly in liver, kidney and erythrocytes. Early research into nutrition identified orotate as "vitamin B13," and its use as a complex with organic cations or metal ions was promulgated in body-building, and in assisting therapies of metabolic syndromes. It has recently been established that the amelioration of gout by dairy products arises from the competition of orotate and urate at the hURAT1 transporter. The orotic aciduria that arises in children with defective UMP synthase can be rescued by oral uridine therapy, since UMP is the end-product and also a feedback inhibitor of the de novo pathway. In contrast, Miller (dysmorphology) syndrome is connected with defects in DHODH, and hence in the supply of OA, and cannot be helped by uridine. Other models of dysmorphisms are connected with enzymes early in the pyrimidine de novo pathway. We conclude that the OA molecule is itself required for the regulation of genes that are important in the development of cells, tissues and organisms.
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Affiliation(s)
- M Löffler
- a Institute of Physiological Chemistry, Faculty of Medicine, Philipps University Marburg , Marburg , Germany
| | - E A Carrey
- b Institute of Child Health, University College London , GB
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Chinnaraja E, Arunachalam R, Subramanian PS. Enantio- and Diastereoselective Synthesis of β-Nitroalcohol via Henry Reaction Catalyzed by Cu(II), Ni(II), Zn(II) Complexes of Chiral BINIM Ligands. ChemistrySelect 2016. [DOI: 10.1002/slct.201601186] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- E. Chinnaraja
- Inorganic Materials and Catalysis Devision; CSIR-Central salt and marine Chemicals Research institute (CSIR-CSMCRI); Bhavnagar Gujarat - 364002 India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CSMCRI; Bhavnagar Gujarat- 364002 India
| | - R. Arunachalam
- Inorganic Materials and Catalysis Devision; CSIR-Central salt and marine Chemicals Research institute (CSIR-CSMCRI); Bhavnagar Gujarat - 364002 India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CSMCRI; Bhavnagar Gujarat- 364002 India
| | - P. S. Subramanian
- Inorganic Materials and Catalysis Devision; CSIR-Central salt and marine Chemicals Research institute (CSIR-CSMCRI); Bhavnagar Gujarat - 364002 India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CSMCRI; Bhavnagar Gujarat- 364002 India
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Dambrova M, Makrecka-Kuka M, Vilskersts R, Makarova E, Kuka J, Liepinsh E. Pharmacological effects of meldonium: Biochemical mechanisms and biomarkers of cardiometabolic activity. Pharmacol Res 2016; 113:771-780. [PMID: 26850121 DOI: 10.1016/j.phrs.2016.01.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/13/2016] [Accepted: 01/15/2016] [Indexed: 01/07/2023]
Abstract
Meldonium (mildronate; 3-(2,2,2-trimethylhydrazinium)propionate; THP; MET-88) is a clinically used cardioprotective drug, which mechanism of action is based on the regulation of energy metabolism pathways through l-carnitine lowering effect. l-Carnitine biosynthesis enzyme γ-butyrobetaine hydroxylase and carnitine/organic cation transporter type 2 (OCTN2) are the main known drug targets of meldonium, and through inhibition of these activities meldonium induces adaptive changes in the cellular energy homeostasis. Since l-carnitine is involved in the metabolism of fatty acids, the decline in its levels stimulates glucose metabolism and decreases concentrations of l-carnitine related metabolites, such as long-chain acylcarnitines and trimethylamine-N-oxide. Here, we briefly reviewed the pharmacological effects and mechanisms of meldonium in treatment of heart failure, myocardial infarction, arrhythmia, atherosclerosis and diabetes.
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Affiliation(s)
- Maija Dambrova
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia; Riga Stradins University, Dzirciema Str. 16, Riga LV-1007, Latvia.
| | - Marina Makrecka-Kuka
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia
| | - Reinis Vilskersts
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia; Riga Stradins University, Dzirciema Str. 16, Riga LV-1007, Latvia
| | - Elina Makarova
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia
| | - Janis Kuka
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia
| | - Edgars Liepinsh
- Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia
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Zhu Y, Zhang G, Zhao J, Li D, Yan X, Liu J, Liu X, Zhao H, Xia J, Zhang X, Li Z, Zhang B, Guo Z, Feng L, Zhang Z, Qu F, Zhao G. Efficacy and Safety of Mildronate for Acute Ischemic Stroke: A Randomized, Double-Blind, Active-Controlled Phase II Multicenter Trial. Clin Drug Investig 2013; 33:755-60. [DOI: 10.1007/s40261-013-0121-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Vilskersts R, Kuka J, Svalbe B, Cirule H, Liepinsh E, Grinberga S, Kalvinsh I, Dambrova M. Administration of L-carnitine and mildronate improves endothelial function and decreases mortality in hypertensive Dahl rats. Pharmacol Rep 2011; 63:752-62. [DOI: 10.1016/s1734-1140(11)70587-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 11/29/2010] [Indexed: 11/28/2022]
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Liepinsh E, Skapare E, Svalbe B, Makrecka M, Cirule H, Dambrova M. Anti-diabetic effects of mildronate alone or in combination with metformin in obese Zucker rats. Eur J Pharmacol 2011; 658:277-83. [PMID: 21371472 DOI: 10.1016/j.ejphar.2011.02.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 01/28/2011] [Accepted: 02/17/2011] [Indexed: 01/25/2023]
Abstract
Mildronate is a cardioprotective drug, the mechanism of action of which is based on the regulation of l-carnitine concentration. We studied the metabolic effects of treatment with mildronate, metformin and a combination of the two in the Zucker rat model of obesity and impaired glucose tolerance. Zucker rats were p.o. treated daily with mildronate (200mg/kg), metformin (300 mg/kg), and a combination of both drugs for 4 weeks. Weight gain and plasma metabolites reflecting glucose metabolism were measured. The expression of peroxisome proliferator-activated receptor (PPAR)-α and PPAR-γ and target genes was measured in rat heart and liver tissues. Each treatment decreased the blood glucose concentration during the fed and fasted states by 1 to 2 mmol/l. Treatment with mildronate and metformin decreased the plasma insulin concentration by 31 and 29%, respectively, while the combination of both drugs significantly reduced fed insulin concentration by about 47%. Mildronate treatment increased the expression of PPAR-α in the heart tissue and PPAR-γ in the heart and liver tissues. In addition, treatment increased the expression of PPAR target genes in the heart, but not in the liver tissue. In contrast to monotherapy, treatment with the combination of mildronate and metformin significantly decreased weight gain by 19% and did not affect food intake. In conclusion, our results demonstrate that mildronate, an inhibitor of l-carnitine biosynthesis, improves adaptation to hyperglycemia- and hyperlipidemia-induced metabolic disturbances and increases PPAR-α activity.
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Blay G, Hernández-Olmos V, Pedro JR. Synthesis of (S)-(+)-sotalol and (R)-(−)-isoproterenol via a catalytic enantioselective Henry reaction. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.02.027] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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