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Kumar Pasala V, Gudipudi G, Sankeshi V, Basude M, Gundla R, Singh Jadav S, Srinivas B, Yadaiah Goud E, Nareshkumar D. Design, synthesis and biological evaluation of selective hybrid coumarin-thiazolidinedione aldose reductase-II inhibitors as potential antidiabetics. Bioorg Chem 2021; 114:104970. [PMID: 34120026 DOI: 10.1016/j.bioorg.2021.104970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/21/2021] [Accepted: 05/04/2021] [Indexed: 10/21/2022]
Abstract
Thiazolidinediones (TZD), benzopyrans are the proven scaffolds for inhibiting Aldose reductase (ALR2) activity and their structural confluence with the retention of necessary fragments helped in designing a series of hybrid compounds 2-(5-cycloalkylidene-2,4-dioxothiazolidin-3-yl)-N-(2-oxo-2H-chromen-3-yl)acetamide (10a-n) for better ALR2 inhibition. The compounds were synthesized by treating substituted 3-(N-bromoacetyl amino)coumarins (9a-d) with potassium salt of 5-cyclo alkylidene-1,3-thiazolidine-2,4-diones (4a-d). The inhibition activity against ALR2 with IC50 values range from 0.012 ± 0.001 to 0.056 ± 0.007 μM. N-[(6-Bromo-3-coumarinyl)-2-(5-cyclopentylidene-2,4-dioxothiazolidin-3-yl)] acetamide (10c) with cyclopentylidene group on one end and the 6-bromo group on the other end showed better inhibitory property (IC50 = 0.012 μM) and selectivity index (324.166) against the ALR2, a forty fold superiority over sorbinil, a better molecule over epalrestat and rest of the analogues exhibited a far superior response over sorbinil and slightly better as compared with epalrestat. It was further confirmed by the insilico studies that compound 10c showed best inhibition activity among the synthesized compounds with a high selectivity index against the ALR2. In invivo experiments, supplementation of compound 10c to STZ induced rats delayed the progression of cataract in a dose-dependent manner warranting its further development as a potential agent to treat thediabetic secondary complications especially cataract.
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Affiliation(s)
- Vijay Kumar Pasala
- Department of Chemistry, Osmania University, Hyderabad (T.S) 500 007, India.
| | - Gopinath Gudipudi
- Department of Chemistry, Osmania University, Hyderabad (T.S) 500 007, India
| | - Venu Sankeshi
- Department of Biophysics, Centre for Cellular and Molecular Biology, Hyderabad (T.S) 500 007, India
| | - Manohar Basude
- Department of Chemistry, Osmania University, Hyderabad (T.S) 500 007, India
| | - Rambabu Gundla
- Department of Chemistry, School of Technology, GITAM University, Hyderabad (T.S) 502 102, India
| | - Surendar Singh Jadav
- Centre for Molecular Cancer Research, Vishnu Institute of Pharmaceutical Education and Research (VIPER), Narsapur, Medak 502313, India
| | - Burra Srinivas
- Department of Chemistry, Osmania University, Hyderabad (T.S) 500 007, India
| | - E Yadaiah Goud
- Department of Chemistry, Osmania University, Hyderabad (T.S) 500 007, India
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Liu W, Chen H, Zhang X, Zhang X, Xu L, Lei Y, Zhu C, Ma B. Isatin derivatives as a new class of aldose reductase inhibitors with antioxidant activity. Med Chem Res 2021. [DOI: 10.1007/s00044-021-02751-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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3
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Lei Y, Zhang X, Zhang X, Xu L, Liu W, Chen H, Zhu C, Ma B. Design of Benzothiazolone‐Based Carboxylic Acid Aldose Reductase Inhibitors. ChemistrySelect 2021. [DOI: 10.1002/slct.202101443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yanqi Lei
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Xin Zhang
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Xiaonan Zhang
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Long Xu
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Wenchao Liu
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Huan Chen
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Changjin Zhu
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
| | - Bing Ma
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Zhongguancun South Street 5 Beijing 100081 P.R. China
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D'Andrea F, Sartini S, Piano I, Franceschi M, Quattrini L, Guazzelli L, Ciccone L, Orlandini E, Gargini C, La Motta C, Nencetti S. Oxy-imino saccharidic derivatives as a new structural class of aldose reductase inhibitors endowed with anti-oxidant activity. J Enzyme Inhib Med Chem 2021; 35:1194-1205. [PMID: 32396745 PMCID: PMC7269086 DOI: 10.1080/14756366.2020.1763331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aldose reductase is a key enzyme in the development of long term diabetic complications and its inhibition represents a viable therapeutic solution for people affected by these pathologies. Therefore, the search for effective aldose reductase inhibitors is a timely and pressing challenge. Herein we describe the access to a novel class of oxyimino derivatives, obtained by reaction of a 1,5-dicarbonyl substrate with O-(arylmethyl)hydroxylamines. The synthesised compounds proved to be active against the target enzyme. The best performing inhibitor, compound (Z)-8, proved also to reduce both cell death and the apoptotic process when tested in an in vitro model of diabetic retinopathy made of photoreceptor-like 661w cell line exposed to high-glucose medium, counteracting oxidative stress triggered by hyperglycaemic conditions.
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Affiliation(s)
| | | | - Ilaria Piano
- Department of Pharmacy, University of Pisa, Pisa, Italy
| | | | | | | | - Lidia Ciccone
- Department of Pharmacy, University of Pisa, Pisa, Italy
| | - Elisabetta Orlandini
- Department of Earth Sciences, University of Pisa, Pisa, Italy.,Research Center "E. Piaggio", University of Pisa, Pisa, Italy
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Dodda D, Rama Rao A, Veeresham C. In vitro and in vivo evaluation of pterostilbene for the management of diabetic complications. J Ayurveda Integr Med 2020; 11:369-375. [PMID: 30459079 PMCID: PMC7772490 DOI: 10.1016/j.jaim.2018.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 01/02/2018] [Accepted: 01/10/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Aldose reductase (AR) and Advanced glycation end product (AGE) are known to play important roles in the development of diabetic complications. The inhibitors of AR and AGE would be potential agents for the prevention of diabetic complications. OBJECTIVE The present study was aimed to evaluate the aldose reductase (AR) and advanced glycation end product (AGE) inhibitory potential of pterostilbene for its possible role in the treatment of diabetic complications such as cataract. MATERIALS AND METHODS The compound was studied for its inhibitory activity against rat lens AR (RLAR) and rat kidney AR (RKAR) in vitro along with its ability to inhibit the formation of AGEs. Anticataract activity of pterostilbene was demonstrated using sugar induced lens opacity model in isolated cattle lens. Further, the involvement of pterostilbene in galactosemia in rats was investigated by assessing the key markers in the polyol pathway and the results were compared with that of a potent AR inhibitor, fidarestat. RESULTS Pterostilbene exhibited inhibitory activity against RLAR and RKAR with IC50 values of 5.49 mg/ml (21.4 mM) and 6.40 mg/ml (25.02 mM), respectively. In sugar-induced lens opacity model, pterostilbene displayed a significant protective effect by preventing opacification and formation of polyols in cattle lens. Besides, the compound exhibited in vivo inhibition of galactitol accumulation in lens and sciatic nerves of galactose fed rats. CONCLUSION The results obtained in the study underline the potential of pterostilbene as possible therapeutic agent against long-term diabetic complications.
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Affiliation(s)
- Dilip Dodda
- University College of Pharmaceutical Sciences, Kakatiya University, Warangal 506009, Telangana, India
| | - Ajmera Rama Rao
- University College of Pharmaceutical Sciences, Kakatiya University, Warangal 506009, Telangana, India
| | - Ciddi Veeresham
- University College of Pharmaceutical Sciences, Kakatiya University, Warangal 506009, Telangana, India.
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Tamoli SM, Kohli KR, Kaikini AA, Muke SA, Shaikh AA, Sathaye S. Vasant Kusmakar Ras, an ayurvedic herbo-mineral formulation prevents the development of diabetic retinopathy in rats. J Ayurveda Integr Med 2020; 11:270-276. [PMID: 32312587 PMCID: PMC7527844 DOI: 10.1016/j.jaim.2020.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 07/10/2019] [Accepted: 02/05/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Diabetic retinopathy is a slow progressing complication of diabetes mellitus with multifactorial aetiology affecting approximately 80% of diabetics worldwide. Chronic hyperglycemic milieu of Diabetes induces biochemical changes which contribute to the pathogenesis of Diabetic retinopathy. OBJECTIVE The present study examined the protective effect of Vasant Kusumakar Ras, an Ayurvedic herbo-mineral formulation, in diabetic retinopathy. MATERIALS AND METHODS Diabetes was induced in rats by intraperitoneal injection of streptozotocin (45 mg/kg). Rats were kept without any treatment for period of three weeks for induction of Diabetic retinopathy followed by treatment with Vasant Kusumakar Ras (11.25 mg/kg, p.o) for further 5 weeks. Fasting blood glucose levels, lipid profile and HbA1c were determined. Eye tissue homogenates were subjected to biochemical analysis to determine the levels of oxidative stress parameters (superoxide dismutase, catalase, reduced glutathione, lipid peroxidation), vascular endothelial growth factor and aldose reductase activity. Histopathological analysis of retinal tissue was conducted using Hematoxylin and Eosin staining. RESULTS Vasant Kusumakar Ras treatment restored serum lipid profile which was altered in diabetic rats. Treatment with Vasant Kusumakar Ras significantly ameliorated the oxidative stress in eye tissue resulting in decreased lipid peroxidation and increase in endogenous antioxidant levels. Levels of aldose reductase and vascular endothelial growth factor in eye tissue were significantly decreased in Vasant Kusumakar Ras treated rats. Hematoxylin and Eosin staining indicated that the Vasant Kusumakar Ras treatment significantly restored the normal architecture of the retinal tissue. CONCLUSION Vasant Kusumakar Ras exhibits protective effect and prevents the development of Diabetic retinopathy through its effects on multiple biochemical pathways implicated in pathogenesis of Diabetic retinopathy.
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Affiliation(s)
- Sanjay Motilal Tamoli
- R. A. Podar Ayurved Medical College, Dr. Annie Besant Road, Worli, Mumbai, Maharashtra, 400018, India
| | - Kuldip Raj Kohli
- Directorate of AYUSH, Govt. of Maharashtra, St.George Hospital, Mumbai, Maharashtra, 400001, India
| | - Aakruti Arun Kaikini
- Institute of Chemical Technology, Department of Pharmaceutical Sciences and Technology, Pharmacology Research Lab-II, A-252, Nathalal Parkeh Marg, Matunga (East), Mumbai, 400019, India
| | - Suraj Abhimanyu Muke
- Institute of Chemical Technology, Department of Pharmaceutical Sciences and Technology, Pharmacology Research Lab-II, A-252, Nathalal Parkeh Marg, Matunga (East), Mumbai, 400019, India
| | - Afroj Abdulgani Shaikh
- Institute of Chemical Technology, Department of Pharmaceutical Sciences and Technology, Pharmacology Research Lab-II, A-252, Nathalal Parkeh Marg, Matunga (East), Mumbai, 400019, India
| | - Sadhana Sathaye
- Institute of Chemical Technology, Department of Pharmaceutical Sciences and Technology, Pharmacology Research Lab-II, A-252, Nathalal Parkeh Marg, Matunga (East), Mumbai, 400019, India.
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Celestina SK, Sundaram K, Ravi S. In vitro studies of potent aldose reductase inhibitors: Synthesis, characterization, biological evaluation and docking analysis of rhodanine-3-hippuric acid derivatives. Bioorg Chem 2020; 97:103640. [PMID: 32086051 DOI: 10.1016/j.bioorg.2020.103640] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 11/28/2019] [Accepted: 01/28/2020] [Indexed: 01/31/2023]
Abstract
Inhibitors of aldose reductase are rate-limiting enzymes and could play a key role to prevent the complications of diabetes. In our attempt to develop novel inhibitors of aldose reductase, the derivatives of rhodanine-3-hippuric acid-pyrazole hybrid were synthesized and characterised by spectral data. The biological studies reveal that all the compounds show an excellent activity against ALR2 with IC50 values ranging from 0.04 to 1.36 µM. Among these the synthesised compounds 6a-m, 6g and 6e showed specific inhibitory activity with IC50 values of 0.04 and 0.06 µM respectively against ALR2 and found to be more potent than epalrestat (IC50 = 0.87 μM), the only aldose reductase inhibitor currently used in the therapy. Molecular docking analysis using the AR-NADP+ complex as a receptor was performed with all the synthesized compounds. All the compounds exhibit a well-defined binding mode within the AR active site, similarly to previous described AR inhibitors, with the anion head group bound to the catalytic center, blocking thus its activity. By forming hydrogen bonds with Tyr48 and His110 of the protein from ALR2 (PDB ID: 2FZD), the compounds 6g and 6e interrupt the proton donation mechanism, which is necessary for the catalytic activity of ALR2.
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Affiliation(s)
- Stephen Kumar Celestina
- Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India
| | - Kaveri Sundaram
- Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India.
| | - Subban Ravi
- Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India
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Quorum sensing involvement in response surface methodology for optimisation of sclerotiorin production by Penicillium sclerotiorum in shaken flasks and bioreactors. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01525-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Abstract
Purpose
Sclerotiorin, an azaphilone produced by some filamentous fungi including Penicillium sclerotiorum, is a pigment with variety of biological activities including lipoxygenase inhibition, reduction of cholesterol levels, and anti-cancer properties. Sclerotiorin has potential use in pharmaceutical as well as food industries. In this context, the purpose of this study was to provide a simple and robust procedure for optimised production of sclerotiorin by P. sclerotiorum using a central composite design developed through response surface methodology (RSM) and to identify the molecule(s) involved in the signalling mechanism in P. sclerotiorum.
Methods
The optimisation of sclerotiorin production was carried out using RSM in shaken flasks and the obtained results were then replicated using a 2-L stirred tank bioreactor. Penicillium sclerotiorum ethyl acetate culture extract was analysed using thin layer chromatography (TLC) and potential signalling molecules were identified using Gas chromatography-mass spectrometry (GC-MS).
Results
The experimental studies suggested an increase in the sclerotiorin production by 2.1-fold and 2.2-fold in shaken flasks and stirred tank bioreactors respectively. Further analysis of P. sclerotiorum ethyl acetate culture extract reported the presence of ricinoleic acid, an oxylipin, belonging to a family of signalling molecules tentatively involved in the enhancement of sclerotiorin production.
Conclusion
This paper has highlighted the positive effect of the optimal supplementation of P. sclerotiorum culture extracts for enhanced production of sclerotiorin. It has also examined potential molecules involved in the signalling mechanism in P. sclerotiorum culture extract for the overproduction of sclerotiorin.
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Salem MG, Aziz YMA, Elewa M, Elshihawy HA, Said MM. Synthesis and molecular modeling of novel non-sulfonylureas as hypoglycemic agents and selective ALR2 inhibitors. Bioorg Med Chem 2019; 27:3383-3389. [DOI: 10.1016/j.bmc.2019.06.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 11/24/2022]
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Curcumin Analogues with Aldose Reductase Inhibitory Activity: Synthesis, Biological Evaluation, and Molecular Docking. Processes (Basel) 2019. [DOI: 10.3390/pr7070417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Curcumin, a constituent of Curcuma longa, has shown numerous biological and pharmacological activities, including antidiabetic effects. Here, a novel series of curcumin analogues were synthesized and evaluated for in vitro inhibition of aldose reductase (AR), the first and rate-limiting enzyme of the polyol pathway, which plays a key role in the onset and progression of diabetic complications. Biological activity studies showed that all the curcuminoids exhibited moderate to good AR inhibitory (ARI) activities compared with that of the quercetin standard. Importantly, compounds 8d, 8h, 9c, 9e, and 10g demonstrated promising ARI activities, with the 50% inhibitory concentration (IC50) values of 5.73, 5.95, 5.11, 5.78, and 5.10 µM, respectively. Four other compounds exhibited IC50 values in the range of 6.04–6.18 µM. Methyl and methoxy derivatives showed a remarkable ARI potential compared with that of other substitutions on the aromatic ring. Molecular docking experiments demonstrated that the most active curcuminoid (10g) was able to favorably bind in the active site of the AR enzyme. The potent ARI activities exhibited by the curcuminoids were attributed to their substitution patterns on the aromatic moiety, which may provide novel leads in the development of therapeutics for the treatment of diabetic complications.
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Song J, Yang X, Yan LJ. Role of pseudohypoxia in the pathogenesis of type 2 diabetes. HYPOXIA 2019; 7:33-40. [PMID: 31240235 PMCID: PMC6560198 DOI: 10.2147/hp.s202775] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/23/2019] [Indexed: 12/14/2022]
Abstract
Type 2 diabetes is caused by persistent high blood glucose, which is known as diabetic hyperglycemia. This hyperglycemic situation, when not controlled, can overproduce NADH and lower nicotinamide adenine dinucleotide (NAD), thereby creating NADH/NAD redox imbalance and leading to cellular pseudohypoxia. In this review, we discussed two major enzymatic systems that are activated by diabetic hyperglycemia and are involved in creation of this pseudohypoxic condition. One system is aldose reductase in the polyol pathway, and the other is poly (ADP ribose) polymerase. While aldose reductase drives overproduction of NADH, PARP could in contrast deplete NAD. Therefore, activation of the two pathways underlies the major mechanisms of NADH/NAD redox imbalance and diabetic pseudohypoxia. Consequently, reductive stress occurs, followed by oxidative stress and eventual cell death and tissue dysfunction. Additionally, fructose formed in the polyol pathway can also cause metabolic syndrome such as hypertension and nonalcoholic fatty liver disease. Moreover, pseudohypoxia can also lower sirtuin protein contents and induce protein acetylation which can impair protein function. Finally, we discussed the possibility of using nicotinamide riboside, an NAD precursor, as a promising therapeutic agent for restoring NADH/NAD redox balance and for preventing the occurrence of diabetic pseudohypoxia.
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Affiliation(s)
- Jing Song
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA.,School of Public Health, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Xiaojuan Yang
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA.,Department of Geriatrics, First Hospital/First Clinical Medical College of Shanxi Medical University, Taiyuan, People's Republic of China
| | - Liang-Jun Yan
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA
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Abstract
INTRODUCTION Aldose reductase (ALR2) is both the key enzyme of the polyol pathway, whose activation under hyperglycemic conditions leads to the development of chronic diabetic complications, and the crucial promoter of inflammatory and cytotoxic conditions, even under a normoglycemic status. Accordingly, it represents an excellent drug target and a huge effort is being done to disclose novel compounds able to inhibit it. AREAS COVERED This literature survey summarizes patents and patent applications published over the last 5 years and filed for natural, semi-synthetic and synthetic ALR2 inhibitors. Compounds described have been discussed and analyzed from both chemical and functional angles. EXPERT OPINION Several ALR2 inhibitors with a promising pre-clinical ability to address diabetic complications and inflammatory diseases are being developed during the observed timeframe. Natural compounds and plant extracts are the prevalent ones, thus confirming the use of phytopharmaceuticals as an increasingly pursued therapeutic trend also in the ALR2 inhibitors field. Intriguing hints may be taken from synthetic derivatives, the most significant ones being represented by the differential inhibitors ARDIs. Differently from classical ARIs, these compounds should fire up the therapeutic efficacy of the class while minimizing its side effects, thus overcoming the existing limits of this kind of inhibitors.
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Affiliation(s)
- Luca Quattrini
- a Dipartimento di Farmacia , Università di Pisa , Pisa , Italy
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Šušaníková I, Balleková J, Štefek M, Hošek J, Mučaji P. Artichoke leaf extract, as AKR1B1 inhibitor, decreases sorbitol level in the rat eye lenses under high glucose conditions ex vivo. Phytother Res 2018; 32:2389-2395. [PMID: 30109747 DOI: 10.1002/ptr.6174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/12/2018] [Accepted: 07/13/2018] [Indexed: 11/08/2022]
Abstract
In the previous study, the artichoke leaf extract showed effective inhibition of AKR1B1, the first enzyme of polyol pathway, which reduces high level of glucose to osmotically active sorbitol, important for development of chronic diabetic complications. In the present study, the effect of artichoke leaf extract and of several participating phenols (caffeic acid, chlorogenic acid, quinic acid, and luteolin) was tested on sorbitol level in rat lenses exposed to high glucose ex vivo, on cytotoxicity as well as on oxidative stress in C2C12 muscle cell line induced by high glucose in vitro. The concentration of sorbitol was determined by enzymatic analysis, the cytotoxicity was provided by WST-1 test and intracellular content of reactive oxygen species was determined by fluorescence of 2'-7'-dichlorofluorescein probe. The extract and the compounds tested showed significant protection against toxic effects of high concentration of glucose in both models. On balance, the artichoke leaf extract thus represents a prospective preventive agent of development of chronic diabetic complications, probably due to phenols content, concerning preclinical and clinical studies.
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Affiliation(s)
- Ivana Šušaníková
- Department of Pharmacognosy and Botany, Faculty of Pharmacy, Comenius University, Bratislava, Slovakia
| | - Jana Balleková
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Milan Štefek
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Jan Hošek
- Department of Molecular Biology and Pharmaceutical Biotechnology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Pavel Mučaji
- Department of Pharmacognosy and Botany, Faculty of Pharmacy, Comenius University, Bratislava, Slovakia
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Abstract
In diabetes mellitus, the polyol pathway is highly active and consumes approximately 30% glucose in the body. This pathway contains 2 reactions catalyzed by aldose reductase (AR) and sorbitol dehydrogenase, respectively. AR reduces glucose to sorbitol at the expense of NADPH, while sorbitol dehydrogenase converts sorbitol to fructose at the expense of NAD+, leading to NADH production. Consumption of NADPH, accumulation of sorbitol, and generation of fructose and NADH have all been implicated in the pathogenesis of diabetes and its complications. In this review, the roles of this pathway in NADH/NAD+ redox imbalance stress and oxidative stress in diabetes are highlighted. A potential intervention using nicotinamide riboside to restore redox balance as an approach to fighting diabetes is also discussed.
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Affiliation(s)
- Liang-Jun Yan
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA
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Chang KC, Petrash JM. Aldo-Keto Reductases: Multifunctional Proteins as Therapeutic Targets in Diabetes and Inflammatory Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1032:173-202. [PMID: 30362099 DOI: 10.1007/978-3-319-98788-0_13] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Aldose reductase (AR) is an NADPH-dependent aldo-keto reductase that has been shown to be involved in the pathogenesis of several blinding diseases such as uveitis, diabetic retinopathy (DR) and cataract. However, possible mechanisms linking the action of AR to these diseases are not well understood. As DR and cataract are among the leading causes of blindness in the world, there is an urgent need to explore therapeutic strategies to prevent or delay their onset. Studies with AR inhibitors and gene-targeted mice have demonstrated that the action of AR is also linked to cancer onset and progression. In this review we examine possible mechanisms that relate AR to molecular signaling cascades and thus explain why AR inhibition is an effective strategy against colon cancer as well as diseases of the eye such as uveitis, cataract, and retinopathy.
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Affiliation(s)
- Kun-Che Chang
- Department of Ophthalmology, School of Medicine, University of Colorado, Aurora, CO, USA.,Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, USA
| | - J Mark Petrash
- Department of Ophthalmology, School of Medicine, University of Colorado, Aurora, CO, USA. .,Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, USA.
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16
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Kondhare D, Lade H. Phytochemical profile, aldose reductase inhibitory, and antioxidant activities of Indian traditional medicinal Coccinia grandis (L.) fruit extract. 3 Biotech 2017; 7:378. [PMID: 29071175 DOI: 10.1007/s13205-017-1013-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 10/16/2017] [Indexed: 11/26/2022] Open
Abstract
Coccinia grandis (L.) fruits (CGFs) are commonly used for culinary purposes and has several therapeutic applications in the Southeast Asia. The aim of this work was to evaluate phytochemical profile, aldose reductase inhibitory (ARI), and antioxidant activities of CGF extract. The CGFs were extracted with different solvents including petroleum ether, dichloromethane, acetone, methanol, and water. The highest yield of total extractable compounds (34.82%) and phenolic content (11.7 ± 0.43 mg of GAE/g dried extract) was found in methanol extract, whereas water extract showed the maximum content of total flavonoids (82.8 ± 7.8 mg QE/g dried extract). Gas chromatography-mass spectroscopy (GC-MS) analysis of methanol and water extract revealed the presence of flavonoids, phenolic compounds, alkaloids, and glycosides in the CGFs. Results of the in vitro ARI activity against partially purified bovine lens aldose reductase showed that methanol extract of CGFs exhibited 96.6% ARI activity at IC50 value 6.12 µg/mL followed by water extract 89.1% with the IC50 value 6.50 µg/mL. In addition, methanol and water extracts of CGF showed strong antioxidant activities including ABTS*+ scavenging, DPPH* scavenging, and hydroxyl radical scavenging. Our results suggest that high percentage of both flavonoids and phenolic contents in the CGFs are correlated with the ARI and antioxidant activities. The fruits of C. grandis are thus potential bifunctional agents with ARI and antioxidant activities that can be used for the prevention and management of DM and associated diseases.
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Affiliation(s)
- Dasharath Kondhare
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, 431606 India
| | - Harshad Lade
- Department of Environmental Engineering, Konkuk University, Seoul, 05029 Republic of Korea
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Liew G, Lei Z, Tan G, Joachim N, Ho IV, Wong TY, Mitchell P, Gopinath B, Crossett B. Metabolomics of Diabetic Retinopathy. Curr Diab Rep 2017; 17:102. [PMID: 28940103 DOI: 10.1007/s11892-017-0939-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PURPOSE OF REVIEW Metabolomics is the study of dysregulated metabolites in biological materials. We reviewed the use of the technique to elucidate the genetic and environmental factors that contribute to the development of diabetic retinopathy. RECENT FINDINGS With regard to metabolomic studies of diabetic retinopathy, the field remains in its infancy with few studies published to date and little replication of results. Vitreous and serum samples are the main tissues examined, and dysregulation in pathways such as the pentose phosphate pathway, arginine to proline pathway, polyol pathway, and ascorbic acidic pathways have been reported. Few studies have examined the metabolomic underpinnings of diabetic retinopathy. Further research is required to replicate findings to date and determine longitudinal associations with disease.
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Affiliation(s)
- Gerald Liew
- Centre for Vision Research, Westmead Millennium Institute of Medical Research, University of Sydney, Westmead, Sydney, 2145, Australia.
- South West Retina, Retina Associates, Liverpool, Sydney, Australia.
| | - Zhou Lei
- Duke-NUS School of Medicine, National University of Singapore, Singapore, Singapore
| | - Gavin Tan
- Duke-NUS School of Medicine, National University of Singapore, Singapore, Singapore
| | - Nichole Joachim
- Centre for Vision Research, Westmead Millennium Institute of Medical Research, University of Sydney, Westmead, Sydney, 2145, Australia
| | - I-Van Ho
- South West Retina, Retina Associates, Liverpool, Sydney, Australia
- Save Sight Institute, University of Sydney, Sydney, Australia
- Australian School of Advanced Medicine, Macquarie University, Sydney, Australia
| | - Tien Y Wong
- Duke-NUS School of Medicine, National University of Singapore, Singapore, Singapore
| | - Paul Mitchell
- Centre for Vision Research, Westmead Millennium Institute of Medical Research, University of Sydney, Westmead, Sydney, 2145, Australia
| | - Bamini Gopinath
- Centre for Vision Research, Westmead Millennium Institute of Medical Research, University of Sydney, Westmead, Sydney, 2145, Australia
| | - Ben Crossett
- Mass Spectrometry Core Facility, Building D17, University of Sydney, Sydney, Australia
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18
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N -(Aroyl)- N -(arylmethyloxy)-α-alanines: Selective inhibitors of aldose reductase. Bioorg Med Chem 2017; 25:3068-3076. [DOI: 10.1016/j.bmc.2017.03.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/24/2017] [Accepted: 03/26/2017] [Indexed: 12/11/2022]
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19
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Chang KC, Li L, Sanborn TM, Shieh B, Lenhart P, Ammar D, LaBarbera DV, Petrash JM. Characterization of Emodin as a Therapeutic Agent for Diabetic Cataract. JOURNAL OF NATURAL PRODUCTS 2016; 79:1439-44. [PMID: 27140653 PMCID: PMC5578730 DOI: 10.1021/acs.jnatprod.6b00185] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Aldose reductase (AR) in the lens plays an important role in the pathogenesis of diabetic cataract (DC) by contributing to osmotic and oxidative stress associated with accelerated glucose metabolism through the polyol pathway. Therefore, inhibition of AR in the lens may hold the key to prevent DC formation. Emodin, a bioactive compound isolated from plants, has been implicated as a therapy for diabetes. However, its inhibitory activity against AR remains unclear. Our results showed that emodin has good selectively inhibitory activity against AR (IC50 = 2.69 ± 0.90 μM) but not other aldo-keto reductases and is stable at 37 °C for at least 7 days. Enzyme kinetic studies demonstrated an uncompetitive inhibition against AR with a corresponding inhibition constant of 2.113 ± 0.095 μM. In in vivo studies, oral administration of emodin reduced the incidence and severity of morphological markers of cataract in lenses of AR transgenic mice. Computational modeling of the AR-NADP(+)-emodin ternary complex indicated that the 3-hydroxy group of emodin plays an essential role by interacting with Ser302 through hydrogen bonding in the specificity pocket of AR. All the findings above provide encouraging evidence for emodin as a potential therapeutic agent to prevent cataract in diabetic patients.
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Affiliation(s)
- Kun-Che Chang
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Linfeng Li
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Theresa M. Sanborn
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Biehuoy Shieh
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Patricia Lenhart
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - David Ammar
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Daniel V. LaBarbera
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - J. Mark Petrash
- Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, Colorado 80045, United States
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20
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Pharmacophore and docking-based hierarchical virtual screening for the designing of aldose reductase inhibitors: synthesis and biological evaluation. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1510-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Luo J, Cai W, Wu T, Xu B. Phytochemical distribution in hull and cotyledon of adzuki bean (Vigna angularis L.) and mung bean (Vigna radiate L.), and their contribution to antioxidant, anti-inflammatory and anti-diabetic activities. Food Chem 2016; 201:350-60. [PMID: 26868587 DOI: 10.1016/j.foodchem.2016.01.101] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 01/10/2016] [Accepted: 01/24/2016] [Indexed: 11/28/2022]
Abstract
Total saponin content, total phenolics content, total flavonoids content, condensed tannin content in hull, cotyledon and whole grain of both adzuki bean and mung bean were determined by colorimetric methods. Vitexin and isovitexin contents in mung bean were determined by HPLC. Antioxidant effects were evaluated with DPPH scavenging activity and ferric reducing antioxidant power assay. In vitro anti-inflammatory and anti-diabetic effects of beans were evaluated by protease and aldose reductase inhibitory assays, respectively. The results indicated that the bean hulls were the most abundant in phytochemicals and largely contributed antioxidant activities, anti-inflammatory effects and anti-diabetic effects of whole grains. The result showed that mung bean hull was the most abundant with vitexin at 37.43 mg/g and isovitexin at 47.18 mg/g, respectively. Most of the phytochemicals and bioactivities were most predominantly contributed by the bean hulls with exception for condensed tannin of mung bean; which was more abundant in the cotyledon than its hull.
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Affiliation(s)
- Jiaqiang Luo
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong 519085, China; Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC 3010, Australia
| | - Weixi Cai
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong 519085, China
| | - Tong Wu
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong 519085, China; Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC 3010, Australia
| | - Baojun Xu
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong 519085, China.
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22
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Andleeb H, Tehseen Y, Ali Shah SJ, Khan I, Iqbal J, Hameed S. Identification of novel pyrazole–rhodanine hybrid scaffolds as potent inhibitors of aldose reductase: design, synthesis, biological evaluation and molecular docking analysis. RSC Adv 2016. [DOI: 10.1039/c6ra14531k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel pyrazole–rhodanine derivatives was designed, synthesized, and biologically evaluated for their potential inhibitory effect on both aldehyde reductase (ALR1) and aldose reductase (ALR2).
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Affiliation(s)
- Hina Andleeb
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Yildiz Tehseen
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Syed Jawad Ali Shah
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Imtiaz Khan
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Shahid Hameed
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
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23
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Hou H, Li R, Wang X, Yuan Z, Liu X, Chen Z, Xu X. Crystallographic analysis of a novel aldo-keto reductase from Thermotoga maritima in complex with NADP⁺. Acta Crystallogr F Struct Biol Commun 2015; 71:847-55. [PMID: 26144229 PMCID: PMC4498705 DOI: 10.1107/s2053230x15009735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/20/2015] [Indexed: 11/10/2022] Open
Abstract
Aldo-keto reductases (AKRs) are a superfamily of NAD(P)H-dependent oxidoreductases that catalyse the asymmetric reduction of aldehydes and ketones to chiral alcohols in various organisms. The novel aldo-keto reductase Tm1743 from Thermotoga maritima was identified to have a broad substrate specificity and high thermostability, serving as an important enzyme in biocatalysis and fine-chemical synthesis. In this study, Tm1743 was overexpressed in Escherichia coli BL21(DE3) cells with an N-terminal His6 tag and was purified by Ni(2+)-chelating affinity and size-exclusion chromatography. Purified recombinant enzyme was incubated with its cofactor NADP(+) and its substrate ethyl 2-oxo-4-phenylbutyrate (EOPB) for crystallization. Two X-ray diffraction data sets were collected at 2.0 and 1.7 Å resolution from dodecahedral crystals grown from samples containing Tm1743-NADP(+)-EOPB and Tm1743-NADP(+), respectively. Both crystals belonged to space group P3121, with similar unit-cell parameters. However, in the refined structure model only NADP(+) was observed in the active site of the full-length Tm1743 enzyme. Degradation of the N-terminal vector-derived amino acids during crystallization was confirmed by Western blot and mass-spectrometric analyses.
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Affiliation(s)
- Hai Hou
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, People’s Republic of China
| | - Ruiying Li
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Xiaoyan Wang
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Zhen Yuan
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Xuemeng Liu
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Zhenmin Chen
- Laboratory of Biocatalysis, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Xiaoling Xu
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
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24
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Synthesis, characterization, hypoglycemic and aldose reductase inhibition activity of arylsulfonylspiro[fluorene-9,5′-imidazolidine]-2′,4′-diones. Eur J Med Chem 2015; 98:127-38. [DOI: 10.1016/j.ejmech.2015.05.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/30/2015] [Accepted: 05/07/2015] [Indexed: 11/21/2022]
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25
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Wu T, Luo J, Xu B. In vitro antidiabetic effects of selected fruits and vegetables against glycosidase and aldose reductase. Food Sci Nutr 2015; 3:495-505. [PMID: 26788291 PMCID: PMC4708650 DOI: 10.1002/fsn3.243] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 03/15/2015] [Accepted: 04/01/2015] [Indexed: 11/17/2022] Open
Abstract
In vitro antidiabetic effect of fruits and vegetables with reports as folk remedies were investigated. The antidiabetic effects were evaluated by comparing the inhibitory properties of α‐glycosidase, aldose reductase, and antioxidant activity. The results indicated that lychee extract exhibited the best dose‐dependent inhibitory activity against α‐glycosidase with IC50 of 10.4 mg/mL, and lemon peel extract exhibited aldose reductase inhibitory potential with IC50 value at 3.63 mg/mL. Besides, the result also showed that the inhibitory effects of blueberry and plum against α‐glycosidase were strong among the fruits samples. Bitter gourd and eggplant demonstrated significant inhibitory potential against aldose reductase, with IC50 values at 8.55 mg/mL and 8.06 mg/mL, respectively. The result from correlation analysis part showed that the antioxidant activities of selected fruits and vegetables were found related to their health beneficial effects, as there was positive correlations between total flavonoids content (TFC) and aldose reductase inhibitory activity (r2 = 0.556).
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Affiliation(s)
- Tong Wu
- Food Science and Technology Program Beijing Normal University-Hong Kong Baptist University United International College Zhuhai Guangdong 519085 China
| | - Jiaqiang Luo
- Food Science and Technology Program Beijing Normal University-Hong Kong Baptist University United International College Zhuhai Guangdong 519085 China
| | - Baojun Xu
- Food Science and Technology Program Beijing Normal University-Hong Kong Baptist University United International College Zhuhai Guangdong 519085 China
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26
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Ilyas Z, Shah HS, Al-Oweini R, Kortz U, Iqbal J. Antidiabetic potential of polyoxotungstates: in vitro and in vivo studies. Metallomics 2015; 6:1521-6. [PMID: 24887259 DOI: 10.1039/c4mt00106k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Diabetes mellitus is a chronic metabolic disorder continuously affecting people all over the world. A common way to treat diabetes mellitus is to limit the conversion of carbohydrates into glucose which is mediated by glucosidase enzymes. Diabetes mellitus is also famous for its life-threatening microvascular (retinopathy, neuropathy and nephropathy) and macrovascular (atherosclerosis) complications. Aldose reductases present in eye lens (ALR1) and kidney (ALR2) are responsible for microvascular complications. The production of advanced glycation end products (AGEs) is involved in the development of atherosclerosis. The present work was aimed at the synthesis and in vitro/in vivo evaluation of different polyoxotungstates against glucosidases (α- and β), aldose reductases (ALR1 and ALR2) and AGEs to discover a new treatment which may limit the complications associated with diabetes mellitus. The polyanion [P6W18O79](20-) was found to be the most potent inhibitor of α-glucosidase (IC50 = 1.33 ± 0.41 μM), ALR1 (IC50 = 0.4 ± 0.009 μM) and ALR2 (IC50 = 0.38 ± 0.02 μM). Animal studies showed that the polyanion [H2W12O40](6-) was very effective in reducing the blood glucose level to 84.25 ± 5.07 mg dL(-1) when compared with standard antidiabetic drug glibenclamide (150.62 ± 9.35 mg dL(-1)) measured after maximum 8 h of dose administration. The data obtained from in vitro and in vivo experiments confirm that [P6W18O79](20-) and [H2W12O40](6-) could be used as a new treatment of diabetes mellitus.
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Affiliation(s)
- Zaitoon Ilyas
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad, Postal Code 22060, Pakistan.
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27
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Stavniichuk R, Shevalye H, Lupachyk S, Obrosov A, Groves JT, Obrosova IG, Yorek MA. Peroxynitrite and protein nitration in the pathogenesis of diabetic peripheral neuropathy. Diabetes Metab Res Rev 2014; 30:669-78. [PMID: 24687457 PMCID: PMC4177961 DOI: 10.1002/dmrr.2549] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 03/04/2014] [Accepted: 03/25/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND Peroxynitrite, a product of the reaction of superoxide with nitric oxide, causes oxidative stress with concomitant inactivation of enzymes, poly(ADP-ribosylation), mitochondrial dysfunction and impaired stress signalling, as well as protein nitration. In this study, we sought to determine the effect of preventing protein nitration or increasing peroxynitrite decomposition on diabetic neuropathy in mice after an extended period of untreated diabetes. METHODS C57Bl6/J male control and diabetic mice were treated with the peroxynitrite decomposition catalyst Fe(III) tetramesitylporphyrin octasulfonate (FeTMPS, 10 mg/kg/day) or protein nitration inhibitor (-)-epicatechin gallate (20 mg/kg/day) for 4 weeks, after an initial 28 weeks of hyperglycaemia. RESULTS Untreated diabetic mice developed motor and sensory nerve conduction velocity deficits, thermal and mechanical hypoalgesia, tactile allodynia and loss of intraepidermal nerve fibres. Both FeTMPS and epicatechin gallate partially corrected sensory nerve conduction slowing and small sensory nerve fibre dysfunction without alleviation of hyperglycaemia. Correction of motor nerve conduction deficit and increase in intraepidermal nerve fibre density were found with FeTMPS treatment only. CONCLUSIONS Peroxynitrite injury and protein nitration are implicated in the development of diabetic peripheral neuropathy. The findings indicate that both structural and functional changes of chronic diabetic peripheral neuropathy can be reversed and provide rationale for the development of a new generation of antioxidants and peroxynitrite decomposition catalysts for treatment of diabetic peripheral neuropathy.
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Affiliation(s)
- Roman Stavniichuk
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, 70808
| | - Hanna Shevalye
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, 70808
| | - Sergey Lupachyk
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, 70808
| | - Alexander Obrosov
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, 70808
| | - John T. Groves
- Department of Chemistry, Princeton University, Princeton, NJ, 08544
| | - Irina G. Obrosova
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, 70808
| | - Mark A. Yorek
- Department of Veterans Affairs Iowa City Health Care System and Department of Internal Medicine, University of Iowa, Iowa City, IA, 52246
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28
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Kinetic and molecular docking studies of loganin and 7-O-galloyl-d-sedoheptulose from Corni Fructus as therapeutic agents for diabetic complications through inhibition of aldose reductase. Arch Pharm Res 2014; 38:1090-8. [DOI: 10.1007/s12272-014-0493-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 10/02/2014] [Indexed: 10/24/2022]
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29
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Aldose reductase inhibition suppresses azoxymethane-induced colonic premalignant lesions in C57BL/KsJ-db/db mice. Cancer Lett 2014; 355:141-7. [PMID: 25218594 DOI: 10.1016/j.canlet.2014.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 08/29/2014] [Accepted: 09/04/2014] [Indexed: 12/31/2022]
Abstract
Type-2 diabetes and obesity-related metabolic abnormalities are major risk factors for the development of colon cancer. In the present study, we examined the effects of polyol pathway enzyme aldose reductase (AR) inhibitor, fidarestat, on the development of azoxymethane (AOM)-induced colonic premalignant lesions in C57BL/KsJ-db/db obese mice. Our results indicate that fidarestat given in the drinking water caused a significant reduction in the total number of colonic premalignant lesions in the AOM treated obese mice. Further, the expression levels of PKC-β2, AKT, COX-2 and iNOS in the colonic mucosa of AOM-treated mice were significantly decreased by fidarestat. The serum levels of IL-1α, IP-10, MIG, TNF-α and VEGF are significantly suppressed in AOM + fidarestat treated obese mice. Fidarestat also decreased the expression of COX-2, iNOS, XIAP, survivin, β-catenin and NF-κB in high glucose-treated HT29 colon cancer cells. In conclusion, our results indicate that fidarestat inhibits the development of colonic premalignant lesions in an obesity-related colon cancer and is chemopreventive to colorectal carcinogenesis in obese individuals.
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30
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Xiao J, Ni X, Kai G, Chen X. Advance in Dietary Polyphenols as Aldose Reductases Inhibitors: Structure-Activity Relationship Aspect. Crit Rev Food Sci Nutr 2014; 55:16-31. [PMID: 25105846 DOI: 10.1080/10408398.2011.584252] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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31
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Hussain S, Parveen S, Qin X, Hao X, Zhang S, Chen X, Zhu C, Ma B. Novel synthesis of nitro-quinoxalinone derivatives as aldose reductase inhibitors. Bioorg Med Chem Lett 2014; 24:2086-9. [DOI: 10.1016/j.bmcl.2014.03.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 10/25/2022]
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32
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Synthesis and biological evaluation of new epalrestat analogues as aldose reductase inhibitors (ARIs). Eur J Med Chem 2014; 71:53-66. [DOI: 10.1016/j.ejmech.2013.10.043] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/26/2013] [Accepted: 10/13/2013] [Indexed: 02/05/2023]
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33
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Fidelis QC, Ribeiro TA, Araújo MF, de Carvalho MG. Ouratea genus: chemical and pharmacological aspects. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2014. [DOI: 10.1590/0102-695x20142413361] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Yoon HN, Lee MY, Kim JK, Suh HW, Lim SS. Aldose reductase inhibitory compounds from Xanthium strumarium. Arch Pharm Res 2013; 36:1090-5. [PMID: 23604720 DOI: 10.1007/s12272-013-0123-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 04/03/2013] [Indexed: 10/26/2022]
Abstract
As part of our ongoing search for natural sources of therapeutic and preventive agents for diabetic complications, we evaluated the inhibitory effects of components of the fruit of Xanthium strumarium (X. strumarium) on aldose reductase (AR) and galactitol formation in rat lenses with high levels of glucose. To identify the bioactive components of X. strumarium, 7 caffeoylquinic acids and 3 phenolic compounds were isolated and their chemical structures were elucidated on the basis of spectroscopic evidence and comparison with published data. The abilities of 10 X. strumarium-derived components to counteract diabetic complications were investigated by means of inhibitory assays with rat lens AR (rAR) and recombinant human AR (rhAR). From the 10 isolated compounds, methyl-3,5-di-O-caffeoylquinate showed the most potent inhibition, with IC₅₀ values of 0.30 and 0.67 μM for rAR and rhAR, respectively. In the kinetic analyses using Lineweaver-Burk plots of 1/velocity and 1/substrate, methyl-3,5-di-O-caffeoylquinate showed competitive inhibition of rhAR. Furthermore, methyl-3,5-di-O-caffeoylquinate inhibited galactitol formation in the rat lens and in erythrocytes incubated with a high concentration of glucose, indicating that this compound may be effective in preventing diabetic complications.
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Affiliation(s)
- Ha Na Yoon
- Department of Food Science and Nutrition, Hallym University, Chuncheon, 200-702, Korea
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35
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Kaur A, Singh B, Jaggi AS. Synthesis and evaluation of novel 2,3,5-triaryl-4H,2,3,3a,5,6,6a-hexahydropyrrolo[3,4-d]isoxazole-4,6-diones for advanced glycation end product formation inhibitory activity. Bioorg Med Chem Lett 2013; 23:797-801. [DOI: 10.1016/j.bmcl.2012.11.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 11/19/2012] [Accepted: 11/20/2012] [Indexed: 01/03/2023]
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36
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Endo S, Fujimoto A, Kumada S, Matsunaga T, Ohno S, Mano J, Tajima K, El-Kabbani O, Hara A. Modulation of activity and inhibitor sensitivity of rabbit aldose reductase-like protein (AKR1B19) by oxidized glutathione and SH-reagents. Chem Biol Interact 2012; 202:146-52. [PMID: 23261715 DOI: 10.1016/j.cbi.2012.11.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 11/28/2012] [Accepted: 11/29/2012] [Indexed: 01/17/2023]
Abstract
Rabbit aldo-keto reductase (AKR) 1B19 is an ortholog of human aldose reductase-like protein (ARLP), AKR1B10, showing 86% amino acid sequence identity. AKR1B19 exhibits the highest catalytic efficiency for 4-oxo-2-nonenal, a major product of lipid peroxidation, compared to known reductases of this aldehyde. In this study, we found that the reductase activity of AKR1B19 was activated to about 5-fold immediately after the addition of 10 μM SH-reagents (p-chloromercuriphenylsulfonic acid and p-chloromercuribenzoic acid) in the absence or presence of NADPH. In addition, a maximum of 3-fold activation of AKR1B19 was induced by incubation with glutathione disulfide (GSSG) for 1h. The activated enzyme was converted into the native enzyme by further incubation with dithiothreitol and glutathione. The activation was abolished by the C299S mutation of AKR1B19, and the glutathionylated Cys299 was identified by mass spectrometry analysis. The Cys299-modified enzyme displayed different kinetic alterations depending on substrates and inhibitors. In the reduction of 4-oxo-2-nonenal, the catalytic efficiency was increased. Thus, AKR1B10 may be modulated by cellular ratio of GSSG/glutathione and more efficiently act as a detoxifying enzyme for the cytotoxic aldehyde under oxidatively stressed conditions. Furthermore, such an activity alteration by GSSG was not detected in AKR1B10 and rat ARLPs, suggesting the presence of a GSSG-binding site near Cys299 in AKR1B19.
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Affiliation(s)
- Satoshi Endo
- Gifu Pharmaceutical University, Gifu 501-1196, Japan.
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37
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Ha TJ, Lee JH, Lee MH, Lee BW, Kwon HS, Park CH, Shim KB, Kim HT, Baek IY, Jang DS. Isolation and identification of phenolic compounds from the seeds of Perilla frutescens (L.) and their inhibitory activities against α-glucosidase and aldose reductase. Food Chem 2012; 135:1397-403. [DOI: 10.1016/j.foodchem.2012.05.104] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 04/23/2012] [Accepted: 05/27/2012] [Indexed: 12/17/2022]
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38
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Aldose reductase inhibitory activity and antioxidant capacity of pomegranate extracts. Interdiscip Toxicol 2012; 5:15-20. [PMID: 22783144 PMCID: PMC3389504 DOI: 10.2478/v10102-012-0003-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 03/10/2012] [Accepted: 03/13/2012] [Indexed: 11/20/2022] Open
Abstract
The pomegranate, Punica granatum L., has been the subject of current interest as a medicinal agent with wide-ranging therapeutic indications. In the present study, pomegranate ethanolic seed and hull extracts were tested, in comparison with a commercial sample, for the inhibition of aldose reductase, an enzyme involved in the etiology of diabetic complications. In vitro inhibition of rat lens aldose reductase was determined by a conventional method. Pomegranate ethanolic hull extract and commercial pomegranate hull extract exhibited similar aldose reductase inhibitory activity characterized by IC(50) values ranging from 3 to 33.3 μg/ml. They were more effective than pomegranate ethanolic seed extract with IC(50) ranging from 33.3 to 333 μg/ml. Antioxidant action of the novel compounds was documented in a DPPH test and in a liposomal membrane model, oxidatively stressed by peroxyl radicals. All the plant extracts showed considerable antioxidant potential in the DPPH assay. Pomegranate ethanolic hull extract and commercial pomegranate hull extract executed similar protective effects on peroxidatively damaged liposomal membranes characterized by 10<IC(50)<100 μg/ml. Pomegranate ethanolic seed extract showed significantly lower antioxidant activity compared to both hull extracts studied. Pomegranate extracts are thus presented as bifunctional agents combining aldose reductase inhibitory action with antioxidant activity and with potential therapeutic use in prevention of diabetic complications.
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Lu J, Liu Y, Wang X, Wang S, Di X. Development and validation of a rapid high-performance liquid chromatography-tandem mass spectrometry method for the determination of WJ-38, a novel aldose reductase inhibitor, in rat plasma and its application to a pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 893-894:29-33. [PMID: 22425386 DOI: 10.1016/j.jchromb.2012.02.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/14/2012] [Accepted: 02/17/2012] [Indexed: 11/25/2022]
Abstract
WJ-38 is an aldose reductase inhibitor that is being developed for the treatment of diabetic complications. The present paper describes a sensitive and specific liquid chromatography-tandem mass spectrometry method for the determination of WJ-38 in rat plasma. Partial denaturation of plasma proteins with methanol followed by liquid-liquid extraction using ethyl acetate was used to extract strongly protein-bound WJ-38 from rat plasma. Chromatographic separation was performed on an Inertsil ODS-3 column with an isocratic mobile phase consisting of acetonitrile, water and formic acid (75:25:0.125, v/v/v). Mass spectrometric detection was achieved by a triple-quadrupole mass spectrometer equipped with an ESI interface operating in positive ionization mode. Quantitation was performed using selected reaction monitoring of precursor-product ion transitions at m/z 392→246 for WJ-38 and m/z 446→321 for glipizide (internal standard). A linear calibration curve was obtained over the concentration range of 10.0-10,000 ng/mL for WJ-38 in rat plasma. The intra- and inter-day precisions were less than 13.6% and the accuracy was within ± 5.3%. The extraction recovery of WJ-38 from rat plasma was over 66.0%. The validated method has been successfully applied to a pharmacokinetic study in rats after intragastrical administration of WJ-38.
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Affiliation(s)
- Jing Lu
- Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
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40
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Xu L, Cohen AE, Boxer SG. Electrostatic fields near the active site of human aldose reductase: 2. New inhibitors and complications caused by hydrogen bonds. Biochemistry 2011; 50:8311-22. [PMID: 21859105 DOI: 10.1021/bi200930f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vibrational Stark effect spectroscopy was used to measure electrostatic fields in the hydrophobic region of the active site of human aldose reductase (hALR2). A new nitrile-containing inhibitor was designed and synthesized, and the X-ray structure of its complex, along with cofactor NADP(+), with wild-type hALR2 was determined at 1.3 Å resolution. The nitrile is found to be in the proximity of T113, consistent with a hydrogen bond interaction. Two vibrational absorption peaks were observed at room temperature in the nitrile region when the inhibitor binds to wild-type hALR2, indicating that the nitrile probe experiences two different microenvironments, and these could be empirically separated into a hydrogen-bonded and non-hydrogen-bonded population by comparison with the T113A mutant, in which a hydrogen bond to the nitrile is not present. Classical molecular dynamics simulations based on the structure predict a double-peak distribution in protein electric fields projected along the nitrile probe. The interpretation of these two peaks as a hydrogen bond formation-dissociation process between the probe nitrile group and a nearby amino acid side chain is used to explain the observation of two IR bands, and the simulations were used to investigate the molecular details of this conformational change. Hydrogen bonding complicates the simplest analysis of vibrational frequency shifts as being due solely to electrostatic interactions through the vibrational Stark effect, and the consequences of this complication are discussed.
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Affiliation(s)
- Lin Xu
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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Ottanà R, Maccari R, Giglio M, Del Corso A, Cappiello M, Mura U, Cosconati S, Marinelli L, Novellino E, Sartini S, La Motta C, Da Settimo F. Identification of 5-arylidene-4-thiazolidinone derivatives endowed with dual activity as aldose reductase inhibitors and antioxidant agents for the treatment of diabetic complications. Eur J Med Chem 2011; 46:2797-806. [DOI: 10.1016/j.ejmech.2011.03.068] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Revised: 03/20/2011] [Accepted: 03/23/2011] [Indexed: 01/24/2023]
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42
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Rajabi M, Mansell D, Freeman S, Bryce RA. Structure–activity relationship of 2,4,5-trioxoimidazolidines as inhibitors of thymidine phosphorylase. Eur J Med Chem 2011; 46:1165-71. [DOI: 10.1016/j.ejmech.2011.01.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 10/14/2010] [Accepted: 01/22/2011] [Indexed: 10/18/2022]
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43
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Lee YS, Kim JK, Bae YS, Won MH, Kang IJ, Lim SS. Inhibitory effect of glucodistylin from the bark of Quercus acutissima on human recombinant aldose reductase and sorbitol accumulation. Arch Pharm Res 2011; 34:211-5. [DOI: 10.1007/s12272-011-0205-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 10/27/2010] [Indexed: 11/24/2022]
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44
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Maccari R, Corso AD, Giglio M, Moschini R, Mura U, Ottanà R. In vitro evaluation of 5-arylidene-2-thioxo-4-thiazolidinones active as aldose reductase inhibitors. Bioorg Med Chem Lett 2011; 21:200-3. [DOI: 10.1016/j.bmcl.2010.11.041] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 11/04/2010] [Accepted: 11/04/2010] [Indexed: 10/18/2022]
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45
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Endo S, Matsunaga T, Kuragano T, Ohno S, Kitade Y, Tajima K, El-Kabbani O, Hara A. Properties and tissue distribution of a novel aldo-keto reductase encoding in a rat gene (Akr1b10). Arch Biochem Biophys 2010; 503:230-7. [PMID: 20709016 DOI: 10.1016/j.abb.2010.08.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 08/07/2010] [Accepted: 08/10/2010] [Indexed: 10/19/2022]
Abstract
A recent rat genomic sequencing predicts a gene Akr1b10 that encodes a protein with 83% sequence similarity to human aldo-keto reductase (AKR) 1B10. In this study, we isolated the cDNA for the rat AKR1B10 (R1B10) from rat brain, and examined the enzymatic properties of the recombinant protein. R1B10 utilized NADPH as the preferable coenzyme, and reduced various aldehydes (including cytotoxic 4-hydroxy-2-hexenal and 4-hydroxy- and 4-oxo-2-nonenals) and α-dicarbonyl compounds (such as methylglyoxal and 3-deoxyglucosone), showing low K(m) values of 0.8-6.1μM and 3.7-67μM, respectively. The enzyme also reduced glyceraldehyde and tetroses (K(m)=96-390μM), although hexoses and pentoses were inactive and poor substrates, respectively. Among the substrates, 4-oxo-2-nonenal was most efficiently reduced into 4-oxo-2-nonenol, and its cytotoxicity against bovine endothelial cells was decreased by the overexpression of R1B10. R1B10 showed low sensitivity to aldose reductase inhibitors, and was activated to approximately two folds by valproic acid, and alicyclic and aromatic carboxylic acids. The mRNA for R1B10 was expressed highly in rat brain and heart, and at low levels in other rat tissues and skin fibroblasts. The results suggest that R1B10 functions as a defense system against oxidative stress and glycation in rat tissues.
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46
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Kador PF, Hamada T, Reinhardt RA, Blessing K. Effect of an aldose reductase inhibitor on alveolar bone loss associated with periodontitis in diabetic rats. Postgrad Med 2010; 122:138-44. [PMID: 20463423 DOI: 10.3810/pgm.2010.05.2151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Periodontitis is a lesser known but frequent complication of diabetes mellitus and is the major cause of tooth loss in patients with diabetes. Dental therapy for this complication is primarily focused on the control of oral infections. No current therapy directly addresses the potential effects of diabetes itself on this complication. In studies conducted in young normal control and streptozotocin diabetic rats (100 g) treated with and without the aldose reductase inhibitor (ARI) imirestat, experimental periodontitis was induced in one side of the mouth by 3 injections of lipopolysaccharide (LPS) from Escherichia coli 055:B5 9 into the palatal gingiva between the first and second maxillary molars at 48-hour intervals. The other control side was injected with phosphate buffered saline (PBS). Fourteen days after the final injection, all rats were euthanized and the heads were defleshed. The maxillary area was separated from the remaining skull. The cleaned maxillary alveoli were stained in 5% aqueous toluidine blue to identify the cemento-enamel junction (CEJ) on the molars. Alveolar bone loss was measured according to standard methods by determining both the distance between the CEJ and the alveolar bone on the 2 molars between which the injections were made, and by measuring the ratio of root area/enamel area in the same region. These measurements showed that LPS injections resulted in significant bone loss compared with PBS injections in both control and diabetic rats, and that this bone loss was not present in the ARI-treated diabetic rats (P < 0.05). These results suggest that the sorbitol pathway plays a critical role in the pathophysiological mechanism(s) of diabetic periodontitis and that AR may be a direct pharmacological target for the treatment for this disease.
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Affiliation(s)
- Peter F Kador
- College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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Abstract
Diabetes mellitus is associated with a 5-fold higher prevalence of cataracts, which remains a major cause of blindness in the world. Typical diabetic cataracts contain cortical and/or posterior subcapsular opacities. Adult onset diabetic cataracts also often contain nuclear opacities. Mechanisms of diabetic cataractogenesis have been studied in less detail than those of other diabetic complications. Both animal and human studies support important contribution of increased aldose reductase activity. Surgical extraction is the only cure of diabetic cataract today. An improved understanding of pathogenetic mechanisms, together with finding effective therapeutic agents, remain highest priority for diabetic cataract-related research and pharmaceutical development.
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Affiliation(s)
- Irina G Obrosova
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA 70808, USA.
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48
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Calderone V, Testai L, Martelli A, Motta CL, Sartini S, Da Settimo F, Breschi MC. Anti-ischaemic activity of an antioxidant aldose reductase inhibitor on diabetic and non-diabetic rat hearts. J Pharm Pharmacol 2010; 62:107-13. [DOI: 10.1211/jpp.62.01.0012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
Many observations report the cardioprotective effects of inhibitors of aldose reductase in different models of ischaemia–reperfusion injury in diabetic myocardium. In this paper, the inhibitory effects of the new pyrido[1,2-a]-pyrimidin-4-one derivative PPO, whose aldose reductase-inhibitory and antioxidant effects were shown in a previous study, were evaluated.
Methods
The effect of PPO was evaluated on aldose reductase from hearts of diabetic and non-diabetic rats, and compared with that of the reference drug epalrestat. Moreover, the two drugs were tested on isolated and Langendorff-perfused diabetic and non-diabetic hearts submitted to ischaemia–reperfusion cycle.
Key findings
Epalrestat showed equivalent levels of potency in inhibiting the activity of the enzyme in the diabetic and in the non-diabetic hearts. On the contrary, the inhibitory potency of PPO was decreased in the diabetic organs. In the diabetic hearts submitted to ischaemia–reperfusion, an increased level of heart aldose reductase activity was recorded, and both PPO and epalrestat produced cardioprotective effects, suggesting that aldose reductase is deeply involved in the process of ischaemia–reperfusion injury in diabetic myocardium. In non-diabetic hearts, where aldose reductase has a lower activity, epalrestat failed to produce significant protection, while PPO still maintained cardioprotective effects, which may be reasonably attributed to useful ‘ancillary’ effects – such as antioxidant activity – independent from the aldose reductase inhibition.
Conclusions
Therefore PPO, a new molecule endowed with both aldose reductase-inhibitory effects and antioxidant activity, may represent the prototype of a new class of multitarget drugs, focused on two different steps deeply involved in the pathogenesis of ischaemic injury of diabetic hearts.
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Affiliation(s)
- Vincenzo Calderone
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia, Biotecnologie, Università di Pisa, Pisa, Italy
| | - Lara Testai
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia, Biotecnologie, Università di Pisa, Pisa, Italy
| | - Alma Martelli
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia, Biotecnologie, Università di Pisa, Pisa, Italy
| | | | - Stefania Sartini
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Pisa, Italy
| | | | - Maria C Breschi
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia, Biotecnologie, Università di Pisa, Pisa, Italy
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Patel MB, Mishra SM. Aldose reductase inhibitory activity and anti catraract potential of some traditionally acclaimed antidiabetic medicinal plants. ACTA ACUST UNITED AC 2009. [DOI: 10.3742/opem.2009.9.3.245] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Wang Z, Ling B, Zhang R, Suo Y, Liu Y, Yu Z, Liu C. Docking and molecular dynamics studies toward the binding of new natural phenolic marine inhibitors and aldose reductase. J Mol Graph Model 2009; 28:162-9. [PMID: 19616461 DOI: 10.1016/j.jmgm.2009.06.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 06/05/2009] [Accepted: 06/13/2009] [Indexed: 11/29/2022]
Abstract
Phenolic marine natural product is a kind of new potential aldose reductase inhibitors (ARIs). In order to investigate the binding mode and inhibition mechanism, molecular docking and dynamics studies were performed to explore the interactions of six phenolic inhibitors with human aldose reductase (hALR2). Considering physiological environment, all the neutral and other two ionized states of each phenolic inhibitor were adopted in the simulation. The calculations indicate that all the inhibitors are able to form stable hydrogen bonds with the hALR2 active pocket which is mainly constructed by residues TYR48, HIS110 and TRP111, and they impose the inhibition effect by occupying the active space. In all inhibitors, only La and its two ionized derivatives La_ion1 and La_ion2, in which neither of the ortho-hydrogens of 3-hydroxyl is substituted by Br, bind with hALR2 active residues using the terminal 3-hydroxyl. While, all the other inhibitors, at least one of whose ortho-sites of 3- and 6-hydroxyls are substituted by Br substituent which take much electron-withdrawing effect and steric hindrance, bind with hALR2 through the lactone group. This means that the Br substituent can effectively regulate the binding modes of phenolic inhibitors. Although the lactone bound inhibitors have relatively high RMSD values, our dynamics study shows that both binding modes are of high stability. For each inhibitor molecule, the ionization does not change its original binding mode, but it does gradually increase the binding free energy, which reveals that besides hydrogen bonds, the electrostatic effect is also important to the inhibitor-hALR2 interaction.
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Affiliation(s)
- Zhiguo Wang
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810001, China
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