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He P, Xu H, Yang C, Yu D, Liu Y, Du J, Li Y. Unveiling the inhibitory mechanism of aureusidin targeting xanthine oxidase by multi-spectroscopic methods and molecular simulations. RSC Adv 2023; 13:1606-1616. [PMID: 36688063 PMCID: PMC9827282 DOI: 10.1039/d2ra06997k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 12/27/2022] [Indexed: 01/10/2023] Open
Abstract
Xanthine oxidase (XO) is a key target for gout treatment. Great efforts have been made towards the discovery and development of new XO inhibitors. Aureusidin (AUR), a natural compound, emerges as the second reported XO inhibitor with an aurone skeleton with an IC50 value of 7.617 ± 0.401 μM in vitro. The inhibitory mechanism of AUR against XO was explored through enzyme kinetic studies, multi-spectroscopic methods, computer simulation techniques, and ADME prediction. The results showed that AUR acts as a rapid reversible and mixed-type XO inhibitor and its binding to XO was driven by hydrogen bonding and hydrophobic interaction. Moreover, AUR presented a strong fluorescence quenching effect through a static quenching process and induced a conformation change of XO. Its binding pattern with XO was revealed through molecular docking, and its affinity toward XO was enhanced through interactions with key amino acid residues in the active pocket of XO. Further, AUR demonstrated good stability and pharmacokinetic behavior properties in molecular dynamics simulation and ADME prediction. In short, the current work clarified in depth the inhibitory mechanism of AUR on XO firstly and then provided fresh insights into its further development as a natural potent XO inhibitor with aurone skeleton.
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Affiliation(s)
- Pei He
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Haiqi Xu
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Can Yang
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Dehong Yu
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Yi Liu
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Jiana Du
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
| | - Yanfang Li
- School of Chemical Engineering, Sichuan UniversityChengdu610065China+86 28 8540 5220
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An MF, Shen C, Zhang SS, Wang MY, Sun ZR, Fan MS, Zhang LJ, Zhao YL, Sheng J, Wang XJ. Anti-hyperuricemia effect of hesperetin is mediated by inhibiting the activity of xanthine oxidase and promoting excretion of uric acid. Front Pharmacol 2023; 14:1128699. [PMID: 37124197 PMCID: PMC10131109 DOI: 10.3389/fphar.2023.1128699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/27/2023] [Indexed: 05/02/2023] Open
Abstract
Hesperetin is a natural flavonoid with many biological activities. In view of hyperuricemia treatment, the effects of hesperetin in vivo and in vitro, and the underlying mechanisms, were explored. Hyperuricemia models induced by yeast extract (YE) or potassium oxonate (PO) in mice were created, as were models based on hypoxanthine and xanthine oxidase (XOD) in L-O2 cells and sodium urate in HEK293T cells. Serum level of uric acid (UA), creatinine (CRE), and urea nitrogen (BUN) were reduced significantly after hesperetin treatment in vivo. Hesperetin provided hepatoprotective effects and inhibited xanthine oxidase activity markedly, altered the level of malondialdehyde (MDA), glutathione peroxidase (GSH-PX) and catalase (CAT), downregulated the XOD protein expression, toll-like receptor (TLR)4, nucleotide binding oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome, interleukin-18 (IL-18), upregulated forkhead box O3a (FOXO3a), manganese superoxide dismutase (MnSOD) in a uric acid-synthesis model in mice. Protein expression of organic anion transporter 1 (OAT1), OAT3, organic cationic transporter 1 (OCT1), and OCT2 was upregulated by hesperetin intervention in a uric acid excretion model in mice. Our results proposal that hesperetin exerts a uric acid-lowering effect through inhibiting xanthine oxidase activity and protein expression, intervening in the TLR4-NLRP3 inflammasome signaling pathway, and up-regulating expression of FOXO3a, MnSOD, OAT1, OAT3, OCT1, and OCT2 proteins. Thus, hesperetin could be a promising therapeutic agent against hyperuricemia.
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Affiliation(s)
- Meng-Fei An
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Science, Yunnan Agricultural University, Kunming, China
| | - Chang Shen
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Shao-Shi Zhang
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Ming-Yue Wang
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Ze-Rui Sun
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Mao-Si Fan
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Li-Juan Zhang
- School of Basic Medicine, Yunnan University of Chinese Medicine, Kunming, China
| | - Yun-Li Zhao
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Science, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research and Development of Natural Products, School of Pharmacy, School of Chemical Science and Technology, Yunnan University, Kunming, China
- *Correspondence: Yun-Li Zhao, ; Jun Sheng, ; Xuan-Jun Wang,
| | - Jun Sheng
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Science, Yunnan Agricultural University, Kunming, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming, China
- *Correspondence: Yun-Li Zhao, ; Jun Sheng, ; Xuan-Jun Wang,
| | - Xuan-Jun Wang
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China
- College of Science, Yunnan Agricultural University, Kunming, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming, China
- *Correspondence: Yun-Li Zhao, ; Jun Sheng, ; Xuan-Jun Wang,
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Putri DP, Wahyuningtyas AP, Al-Baarri AN, Maharani N. The effect of chayote leaves (Sechium edule)’s flavonoid fraction on the reduction of the serum uric acid levels through the inhibition of xanthine oxidase activity. POTRAVINARSTVO 2021. [DOI: 10.5219/1667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Uric acid is the final product of purine metabolism and is categorized as hyperuricemia when it reaches >6.0 mg.dL-1 for women and >7.0 mg.dL-1 for men. The chayote leaves (Sechium edule) contain a high amount of flavonoid and might be used as an alternative to reduce hyperuricemia. The purpose of this study is to analyze the effect of chayote leaves (Sechium edule)’s flavonoid fraction on the level of uric acid and the activity of xanthine oxidase (XO) in Sprague Dawley Rats. The flavonoid fraction (FF) was obtained by extracting the chayote leaves, fractionating with n-hexane, hydrolyzing with HCl, and finally re-fractionating with ethyl acetate. Thirty male Sprague Dawley rats were induced for hyperuricemia by potassium oxonate and broth block for 21 days, and the interventions were given orally for 14 days. The rats were divided randomly into five groups: normal control (K-), hyperuricemia control (K+), hyperuricemia with FF dose 50 mg.200g-1 body weight (P1), hyperuricemia with FF dose 100 mg.200g-1 body weight (P2) and hyperuricemia with allopurinol 1.8 mg.200g-1 body weight. Xanthine oxidase activity was measured by CheKineTM Xanthine Oxidase Assay Kit, with simple colorimetry methods. The statistical analysis for XO activity was done using Kruskal-Wallis followed by Mann Whitney. The results showed that chayote leaves (Sechium edule)’s flavonoid fraction contains apigenin, apigenin o-glucoside, and luteolin. It also has antioxidant activity with 98.45% inhibition. There was a significant reduction in xanthine oxidase activity in groups treated with FF (p <0.005). The best dose of FF affecting XO activity was 100 mg.200g-1 body weight. The combination of FF and allopurinol can be more effective in decreasing uric acid levels by inhibiting XO activity.
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Bis-thiobarbiturates as Promising Xanthine Oxidase Inhibitors: Synthesis and Biological Evaluation. Biomedicines 2021; 9:biomedicines9101443. [PMID: 34680559 PMCID: PMC8533253 DOI: 10.3390/biomedicines9101443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/01/2021] [Accepted: 10/08/2021] [Indexed: 12/22/2022] Open
Abstract
Xanthine oxidase (XO) is the enzyme responsible for the conversion of endogenous purines into uric acid. Therefore, this enzyme has been associated with pathological conditions caused by hyperuricemia, such as the disease commonly known as gout. Barbiturates and their congeners thiobarbiturates represent a class of heterocyclic drugs capable of influencing neurotransmission. However, in recent years a very large group of potential pharmaceutical and medicinal applications have been related to their structure. This great diversity of biological activities is directly linked to the enormous opportunities found for chemical change off the back of these findings. With this in mind, sixteen bis-thiobarbiturates were synthesized in moderate to excellent reactional yields, and their antioxidant, anti-proliferative, and XO inhibitory activity were evaluated. In general, all bis-thiobarbiturates present a good antioxidant performance and an excellent ability to inhibit XO at a concentration of 30 µM, eight of them are superior to those observed with the reference drug allopurinol (Allo), nevertheless they were not as effective as febuxostat. The most powerful bis-thiobarbiturate within this set showed in vitro IC50 of 1.79 μM, which was about ten-fold better than Allo inhibition, together with suitable low cytotoxicity. In silico molecular properties such as drug-likeness, pharmacokinetics, and toxicity of this promising barbiturate were also analyzed and herein discussed.
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Zhu JX, Yang HY, Hu WQ, Cheng J, Liu Y, Yi LT, Cheng HY. Active components from Lagotis brachystachya maintain uric acid homeostasis by inhibiting renal TLR4-NLRP3 signaling in hyperuricemic mice. Inflammopharmacology 2021; 29:1187-1200. [PMID: 34244900 DOI: 10.1007/s10787-021-00844-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 06/26/2021] [Indexed: 01/13/2023]
Abstract
Lagotis brachystachya Maxim is a herb widely used in traditional Tibetan medicine. Our previous study indicated that total extracts from Lagotis brachystachya could lower uric acid levels. This study aimed to further elucidate the active components (luteolin, luteoloside and apigenin) isolated from Lagotis brachystachya and the underlying mechanism in vitro and in vivo. The results showed that treatment with luteolin and luteoloside reversed the reduction of organic anion transporter 1 (OAT1) levels, while apigenin attenuated the elevation of urate transporter 1 (URAT1) and glucose transporter 9 (GLUT9) levels in uric acid-treated HK-2 cells, which was consistent with the finding in the kidneys of potassium oxonate (PO)-induced mice. On the other hand, hepatic xanthine oxidase activity was inhibited by the components. In addition, all of these active components improved the morphology of the kidney in hyperuricemic mice. Moreover, molecular docking showed that luteolin, luteoloside and apigenin could bind Toll-like receptor 4 (TLR4) and NLR family pyrin domain containing 3 (NLRP3). Congruently, western blot analysis showed that the components inhibited TLR4/myeloid differentiation primary response 88 (MyD88)/NLRP3 signaling. In conclusion, these results indicated that luteolin, luteoloside and apigenin could attenuate hyperuricemia by decreasing the production and increasing the excretion of uric acid, which were mediated by inhibiting inflammatory signaling pathways.
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Affiliation(s)
- Ji-Xiao Zhu
- Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Jiangxi province, Nanchang, 330004, People's Republic of China
| | - Hai-Yan Yang
- Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Jiangxi province, Nanchang, 330004, People's Republic of China
| | - Wei-Qiong Hu
- Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Jiangxi province, Nanchang, 330004, People's Republic of China
| | - Jie Cheng
- Department of Chemical and Pharmaceutical Engineering, Huaqiao University, Fujian province, Xiamen, 361021, People's Republic of China
| | - Yang Liu
- Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Jiangxi province, Nanchang, 330004, People's Republic of China
| | - Li-Tao Yi
- Department of Chemical and Pharmaceutical Engineering, Huaqiao University, Fujian province, Xiamen, 361021, People's Republic of China.
| | - Hong-Yu Cheng
- School of Humanities, Jiangxi University of Chinese Medicine, Jiangxi province, Nanchang, 330004, People's Republic of China.
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