scholarly journals Effects of Toona sinensis Leaf Extract and Its Chemical Constituents on Xanthine Oxidase Activity and Serum Uric Acid Levels in Potassium Oxonate-Induced Hyperuricemic Rats

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3254 ◽  
Author(s):  
Heung Yuk ◽  
Young-Sil Lee ◽  
Hyung Ryu ◽  
Seung-Hyung Kim ◽  
Dong-Seon Kim
Keyword(s):  
Uric Acid ◽  
Xanthine Oxidase ◽  
Serum Uric Acid ◽  
Leaf Extract ◽  
Chemical Constituents ◽  
Mass Spectrometry Analysis ◽  
Spectrometry Analysis ◽  
Toona Sinensis ◽  
Potassium Oxonate

Toona sinensis leaf is used as a seasonal vegetable in Korea. A 70% ethanol extract of these leaves exhibited potent xanthine oxidase (XO) inhibition, with a 50% inhibitory concentration (IC50) of 78.4 µM. To investigate the compounds responsible for this effect, bioassay-guided purification led to the isolation of five constituents, identified as quercetin-3-O-rutinoside, quercetin-3-O-β-d-glucopyranoside, 1,2,3,4,6-penta-O-galloyl-β-d-glucopyranose (compound 3), quercetin-3-O-α-l-rhamnopyranoside, and kaempferol-3-O-α-l-rhamnopyranoside. Compound 3 showed the most potent inhibition of XO, with an IC50 of 2.8 µM. This was similar to that of allopurinol (IC50 = 2.3 µM), which is used clinically to treat hyperuricemia. Kinetic analyses found that compound 3 was a reversible noncompetitive XO inhibitor. In vivo, the T. sinensis leaf extract (300 mg/kg), or compound 3 (40 mg/kg), significantly decreased serum uric acid levels in rats with potassium oxonate-induced hyperuricemia. Furthermore, ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry analysis identified a high level of compound 3 in the leaf extract. These findings suggest that T. sinensis leaves could be developed to produce nutraceutical preparations.

Hypouricemic Effects of Phenylpropanoid Glycosides Acteoside ofScrophularia ningpoensison Serum Uric Acid Levels in Potassium Oxonate-Pretreated Mice

2008 ◽  
Vol 36 (01) ◽  
pp. 149-157 ◽  
Author(s):  
Cai Guo Huang ◽  
Yan Jun Shang ◽  
Jun Zhang ◽  
Jian Rong Zhang ◽  
Wen Jie Li ◽  
...  
Keyword(s):  
Uric Acid ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Xanthine Oxidase ◽  
Serum Uric Acid ◽  
Mouse Liver ◽  
Xanthine Dehydrogenase ◽  
Phenylpropanoid Glycoside ◽  
Phenylpropanoid Glycosides ◽  
Potassium Oxonate

Phenylpropanoid glycoside acteoside was extracted from the traditional Chinese medicine Scrophularia ningpoenis Hemsl. In the present study, we investigated the effects of acteoside administration on serum uric acid levels in mice rendered hyperuricemic with the uricase inhibitor potassium oxonate. When administered orally for 3 days at doses of 50, 100 and 150 mg/kg, acteoside reduced serum uric acid levels by 15.2, 23.8 and 33.1%, respectively, relative to vehicle-treated hyperuricemic mice. Importantly, in non-hyperuricemic mice, the serum uric acid levels were not affected by acetoside treatment. Acteoside also inhibited mouse liver xanthine dehydrogenase XDH and xanthine oxidase XO activity at all three doses. These results suggest that the hypouricemic action of acteoside may be attributable to its inhibition of XDH/XO activity.

Salvia plebeia Extract Inhibits Xanthine Oxidase Activity In Vitro and Reduces Serum Uric Acid in an Animal Model of Hyperuricemia

Planta Medica ◽  
2017 ◽  
Vol 83 (17) ◽  
pp. 1335-1341 ◽  
Author(s):  
Jin Kim ◽  
Woo Kim ◽  
Jung Hyun ◽  
Jong Lee ◽  
Jin Kwon ◽  
...  
Keyword(s):  
Animal Model ◽  
Enzyme Activity ◽  
Uric Acid ◽  
Xanthine Oxidase ◽  
Serum Uric Acid ◽  
Serum Urate ◽  
Key Enzyme ◽  
Ic50 Values

AbstractHyperuricemia is a clinical condition characterized by an elevated level of serum uric acid and is a key risk factor for the development of gout and metabolic disorders. The existing urate-lowering therapies are often impractical for certain patient populations, providing a rationale to explore new agents with improved safety and efficacy. Here, we discovered that Salvia plebeia extract inhibited the enzyme activity of xanthine oxidase, which is a key enzyme generating uric acid in the liver. In an animal model of hyperuricemia, S. plebeia extract reduced serum urate to the levels observed in control animals. The urate-lowering effect of S. plebeia extract in vivo was supported by the identification of compounds that inhibit xanthine oxidase enzyme activity in vitro. Nepetin, scutellarein, and luteolin contributed significantly to S. plebeia bioactivity in vitro. These compounds showed the highest potency against xanthine oxidase with IC50 values of 2.35, 1.74, and 1.90 µM, respectively, and were present at moderate quantities. These observations serve as a basis for further elaboration of the S. plebeia extracts for the development of new therapeutics for hyperuricemia and related diseases.

Hypouricemic effects of Mesona procumbens Hemsl. through modulating xanthine oxidase activity in vitro and in vivo

2016 ◽  
Vol 7 (10) ◽  
pp. 4239-4246 ◽  
Author(s):  
Jhih-Jia Jhang ◽  
Jia-Wei Ong ◽  
Chi-Cheng Lu ◽  
Chin-Lin Hsu ◽  
Jia-Hong Lin ◽  
...  
Keyword(s):  
Uric Acid ◽  
Xanthine Oxidase ◽  
Serum Uric Acid ◽  
Oxidase Activity ◽  
Xanthine Oxidase Activity

Uric acid is a metabolite obtained from purine by xanthine oxidase activity (XO) and high levels of serum uric acid leads to hyperuricemia and gout.

Application of UHPLC/ESI-Q-TOF-MS/MS to Identify Constituents of Erding Granule and Anti-hyperuricemia Effect

2019 ◽  
Vol 15 (5) ◽  
pp. 465-486 ◽  
Author(s):  
Haifang Chen ◽  
Yun Yao ◽  
Yuan Zhan ◽  
Hui Jian ◽  
Yan Li ◽  
...  
Keyword(s):  
Uric Acid ◽  
Xanthine Oxidase ◽  
Chemical Constituents ◽  
Serum Urate ◽  
Chemical Information ◽  
Upper Respiratory Tract ◽  
Serum Urate Level ◽  
Tof Ms

Background: Erding granule (EDG) widely used as an agent with the effect of heat-clearing, detoxifying, eliminating dampness, relieving jaundice and upper respiratory tract disease in clinical application, but the systematic chemical information and anti-hyperuricemia effect of EDG was still unclear. Methods: An ultra-high performance liquid chromatography combined with electrospray ionization quadrupole time-of-flight mass spectrometry (UHPLC/ESI-Q-TOF-MS/MS) method was utilized to rapidly identify the chemical constituents of EDG. The anti-hyperuricemia effect of EDG was evaluated based on the effect on xanthine oxidase inhibitory activity (in vitro) and lowering uric acid (in vivo). Results: 198 compounds were tentatively separated and identified or characterized within 30 min by UHPLC/ESI-Q-TOF MS/MS. These compounds were categorized as 22 coumarins, 38 flavones, 67 alkaloids, 36 organic acids, 16 sesquiterpenes, 14 lignans and 5 the others constituents. Meanwhile, EDG significantly decreases the serum urate level of hyperuricemic mice induced by potassium oxonate, while EDG did not significantly decrease the serum urate level of hyperuricemic mice induced by hypoxanthine and activity of xanthine oxidase in vitro. Conclusion: The method developed was rapid and sensitive to characterize the chemical constituents of EDG, and provide a systematic view of chemical information for EDG. Furthermore, we first discovered the anti-hyperuricemia effect of EDG and it would further provide the reference for clarifying the mechanism of EDG on lowering uric acid.

scholarly journals N-Terminomics Strategies for Protease Substrates Profiling

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4699
Author(s):  
Mubashir Mintoo ◽  
Amritangshu Chakravarty ◽  
Ronak Tilvawala
Keyword(s):  
Mass Spectrometry ◽  
Protease Activity ◽  
Viral Infections ◽  
Mass Spectrometry Analysis ◽  
Post Translational Modification ◽  
Spectrometry Analysis ◽  
Physiological Conditions ◽  
Inflammatory Conditions ◽  
Biological Mixtures

Proteases play a central role in various biochemical pathways catalyzing and regulating key biological events. Proteases catalyze an irreversible post-translational modification called proteolysis by hydrolyzing peptide bonds in proteins. Given the destructive potential of proteolysis, protease activity is tightly regulated. Dysregulation of protease activity has been reported in numerous disease conditions, including cancers, neurodegenerative diseases, inflammatory conditions, cardiovascular diseases, and viral infections. The proteolytic profile of a cell, tissue, or organ is governed by protease activation, activity, and substrate specificity. Thus, identifying protease substrates and proteolytic events under physiological conditions can provide crucial information about how the change in protease regulation can alter the cellular proteolytic landscape. In recent years, mass spectrometry-based techniques called N-terminomics have become instrumental in identifying protease substrates from complex biological mixtures. N-terminomics employs the labeling and enrichment of native and neo-N-termini peptides, generated upon proteolysis followed by mass spectrometry analysis allowing protease substrate profiling directly from biological samples. In this review, we provide a brief overview of N-terminomics techniques, focusing on their strengths, weaknesses, limitations, and providing specific examples where they were successfully employed to identify protease substrates in vivo and under physiological conditions. In addition, we explore the current trends in the protease field and the potential for future developments.

Effect and Mechanism of Total Saponin of Dioscorea on Animal Experimental Hyperuricemia

2006 ◽  
Vol 34 (01) ◽  
pp. 77-85 ◽  
Author(s):  
Guang-Liang Chen ◽  
Wei Wei ◽  
Shu-Yun Xu
Keyword(s):  
Uric Acid ◽  
Serum Uric Acid ◽  
Acid Concentration ◽  
Serum Uric Acid Level ◽  
Urate Oxidase ◽  
Uric Acid Concentration ◽  
Total Saponin ◽  
Test Kit ◽  
Serum Uric Acid Concentration ◽  
Potassium Oxonate

In this study, we investigated the effects and mechanisms of Total Saponin of Dioscorea (TSD) on animal experimental hyperuricemia. Mouse and rat hyperuricemic models were made by orally administering yeast extract paste once a day (30 and 20 g/kg, respectively), for 7 days. Yeast would disturb normal purine metabolism by increasing xanthine oxidase (XOD) activity and generating large quantities of uric acid. This model is similar to human hyperuricemia, which is induced by high-protein diets, due to a purine and nucleic acid metabolic disturbance. Another mouse hyperuricemia model was generated by intraperitoneal injection once with uric acid 250 mg/kg or potassium oxonate 300 mg/kg. Potassium oxonate, a urate oxidase inhibitor, can raise the serum uric acid level by inhibiting the decomposition of uric acid. Likewise, injecting uric acid can also increase serum uric acid concentration. The concentration of uric acid in serum or urine was detected by the phosphotungstic acid method, and the activity of XOD was assayed by a test kit. The results showed that TSD (240, 120 and 60 mg/kg, ig) could significantly lower the level of serum uric acid in hyperuricemic mice. TSD (120 and 60 mg/kg, ig) could also lower the level of serum uric acid in hyperuricemic rats, reduce the activity of XOD in the serum and liver of hyperuricemic rats, and increase the level of urine uric acid concentration as well as 24-hour total uric acid excretion. In conclusion, TSD possesses a potent anti-hyperuricemic effect on hyperuricemic animals, and the mechanism may be relevant in accelerating the excretion and decreasing the production of uric acid.

scholarly journals Phytotoxicity of Essential Oils on Selected Weeds: Potential Hazard on Food Crops

Plants ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 79 ◽  
Author(s):  
María Ibáñez ◽  
María Blázquez
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Food Crops ◽  
Potential Hazard ◽  
Spectrometry Analysis

The chemical composition of winter savory, peppermint, and anise essential oils, and in vitro and in vivo phytotoxic activity against weeds (Portulaca oleracea, Lolium multiflorum, and Echinochloa crus-galli) and food crops (maize, rice, and tomato), have been studied. Sixty-four compounds accounting for between 97.67–99.66% of the total essential oils were identified by Gas Chromatography-Mass Spectrometry analysis. Winter savory with carvacrol (43.34%) and thymol (23.20%) as the main compounds produced a total inhibitory effect against the seed germination of tested weed. Menthol (48.23%), menthone (23.33%), and iso-menthone (16.33%) from peppermint only showed total seed germination inhibition on L. multiflorum, whereas no significant effects were observed with trans-anethole (99.46%) from anise at all concentrations (0.125–1 µL/mL). Low doses of peppermint essential oil could be used as a sustainable alternative to synthetic agrochemicals to control L. multiflorum. The results corroborate that in vivo assays with a commercial emulsifiable concentrate need higher doses of the essential oils to reproduce previous in vitro trials. The higher in vivo phytotoxicity of winter savory essential oil constitutes an eco-friendly and less pernicious alternative to weed control. It is possible to achieve a greater in vivo phytotoxicity if less active essential oil like peppermint is included with other active excipients.

scholarly journals IDENTIFICATION OF BIOACTIVE COMPOUNDS BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY ANALYSIS OF SYZYGIUM JAMBOS (L.) COLLECTED FROM WESTERN GHATS REGION COIMBATORE, TAMIL NADU

2016 ◽  
Vol 10 (1) ◽  
pp. 364 ◽  
Author(s):  
Devakumar Devakumar Joseph ◽  
Keerthana Veerasamy ◽  
Sudha Siva Singaram
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Carboxylic Acid ◽  
Bioactive Compounds ◽  
Leaf Extract ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Syzygium Jambos ◽  
Chromatography Mass Spectrometry

ABSTRACTObjective: The aim of this study was to investigate the presence of bioactive compounds in the methanolic leaf extract of Syzygium jambos.Methods: Collected leaves were shade dried and made into fine powder, extracted with methanol, and the methanolic extract was prepared andanalyzed for the presence of bioactive compounds by gas chromatography-mass spectrometry (GC-MS). The mass spectrum of the chromatographywas matched with NIST and WILEY Libraries.Results: The GC-MS analysis revealed the presence of 45 active compounds in the extract. From the GC-MS investigation, 1-Deoxy-d-mannitol3-methyl-2-methylsulfanyl-5-nitro-6-pyridin-4-ylpyrimidin-4-one, 3-Pentadecylphenol, 2-biphenylene carboxylic acid, Quinoline-3-carboxylic acid,and Stigmast-5-en-3-ol are important phytoconstituents which have antipyretic and antiparasitic activities.Conclusion: The present investigation revealed preliminary information on phytocompounds presented in S. jambos leaf extract which is very usefulfor the human community.Keywords: Syzygium jambos, Gas chromatography-mass spectrometry analysis, 1-Deoxy-d-mannitol, Phytoconstituents, Methanolic leaf extract.

Sign in / Sign up

Export Citation Format

Share Document