<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rut Novalia Rahmawati Sianipar</style></author><author><style face="normal" font="default" size="100%">Komar Sutriah</style></author><author><style face="normal" font="default" size="100%">Dyah Iswantini</style></author><author><style face="normal" font="default" size="100%">Suminar Setiati Achmadi</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Inhibitory Capacity of Xanthine Oxidase in Antigout Therapy by Indonesian Medicinal Plants</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Competitive inhibition kinetics</style></keyword><keyword><style  face="normal" font="default" size="100%">Flavonoid</style></keyword><keyword><style  face="normal" font="default" size="100%">Gout</style></keyword><keyword><style  face="normal" font="default" size="100%">Indonesia</style></keyword><keyword><style  face="normal" font="default" size="100%">Xanthine Oxidase</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">April 2022</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">14</style></volume><pages><style face="normal" font="default" size="100%">470-479</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;The traditional medicine has been used in Indonesia since the days of the Ancient Mataram Kingdom (about 12 centuries ago). Indonesia is rich in medicinal plants. For this reason, it is necessary to inform the broader community regarding medicinal plants in Indonesia that have the potential as antigout. The prevalence of gout in Indonesia is in the range of 1.6−13.6 per 100,000 people and will increase with age. There are 25 species of Indonesian plants that have more than 50% xanthine oxidase (XO) enzyme inhibitory activity. XO is responsible for catalyzing hypoxanthine to xanthine then producing uric acid, accompanied by the formation of reactive oxygen species (ROS) during catalysis. The magnitude of the inhibitory power to XO ranged from 50.00±1.16% to 97.53%. The lowest inhibitory power of 50.00±1.16% was in &lt;em&gt;Phaleria macrocarpa,&lt;/em&gt; while Orthosiphon aristatus had the highest inhibitory power of 97.53%. The major compounds that inhibit xanthine oxidase are flavonoids. The structural similarity of flavonoids in rings A and C with xanthine as a substrate causes hydrophobic interactions, hydrogen bonds, and van der Waals forces between flavonoids and XO. It means that flavonoids bind to the XO active site, thereby preventing the formation of uric acid. The type of inhibitory kinetics that occurs between flavonoids and XO is competitive inhibition. Five plants with competitive inhibition kinetics against XO are&lt;em&gt; Sida rhombifolia, Syzygium polyanthum, Cyperus rotundus, Ruellia tuberosa &lt;/em&gt;and &lt;em&gt;Phaleria macrocarpa.&lt;/em&gt;&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><work-type><style face="normal" font="default" size="100%">Review Article</style></work-type><section><style face="normal" font="default" size="100%">470</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Rut Novalia Rahmawati Sianipar&lt;sup&gt;1&lt;/sup&gt;, Komar Sutriah&lt;sup&gt;1,*&lt;/sup&gt;, Dyah Iswantini&lt;sup&gt;1,2,*&lt;/sup&gt;, Suminar Setiati Achmadi&lt;/strong&gt;&lt;sup&gt;&lt;strong&gt;1,2&lt;/strong&gt; &lt;/sup&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Chemistry, Faculty of Mathematics and Natural Sciences, IPB University, Bogor 16680, INDONESIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Tropical Biopharmaca Research Center, IPB University, Bogor 16128, INDONESIA.&lt;/p&gt;
</style></auth-address></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aktsar Roskiana Ahmad</style></author><author><style face="normal" font="default" size="100%">Berna Elya</style></author><author><style face="normal" font="default" size="100%">Abdul Mun’im</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antioxidant Activity and Isolation of Xanthine Oxidase Inhibitor from Ruellia tuberosa L. Leaves</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antioxidant</style></keyword><keyword><style  face="normal" font="default" size="100%">DPPH</style></keyword><keyword><style  face="normal" font="default" size="100%">Flavonoid.</style></keyword><keyword><style  face="normal" font="default" size="100%">Ruellia Tuberosa</style></keyword><keyword><style  face="normal" font="default" size="100%">Xanthine Oxidase</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">July 2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">/files/pj-9-5/10.5530pj.2017.5.96/index.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">607-610</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; The leaves of &lt;em&gt;Ruellia tuberosa &lt;/em&gt;L. have been known to demonstrate strong antioxidant and xanthine oxidase (XOD) inhibitory activities. The aim of this study was to isolate antioxidant and XOD inhibitor from the leaves of the plants.&lt;strong&gt; Methods:&lt;/strong&gt; Isolation of antioxidant and XOD inhibitor were conducted using chromatography techniques. The structure of the isolated compound was elucidated by spectroscopic methods. &lt;strong&gt;Results:&lt;/strong&gt; In this study, a flavonoid was isolated and characterized as methoxylated flavonoid based on the spectral data including UV, IR, GC-MS, and NMR. The compound demonstrated DPPH free radical scavenging activity with IC&lt;sub&gt;50&lt;/sub&gt; of 28.79 &amp;mu;g/ml, and XOD inhibitory with IC&lt;sub&gt;50&lt;/sub&gt; of 0.67 &amp;mu;g/mL. &lt;strong&gt;Conclusion:&lt;/strong&gt; The isolated compound was determined as 5-hydroxy-3,7-dimethoxy-2-(4-((3S,4S,5S,6R)-4,5, 6-trihydroxy-2(hydroxymethoxy)-tetrahydro-2H-pyrane-3-iloxy) phenyl)-4H-chromen-4-on or camarosids. The isolated compound demonstrated strong DPPH free radical scavenging and XOD inhibitory activity.&amp;nbsp;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">607</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Aktsar Roskiana Ahmad&lt;sup&gt;1,2&lt;/sup&gt;, Berna Elya&lt;sup&gt;1&lt;/sup&gt;, Abdul Mun&amp;rsquo;im&lt;sup&gt;1* &lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Pharmacognosy- Phytochemistry, Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok 16424 West Java, INDONESIA&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Faculty of Pharmacy, Indonesia Muslim University, Makassar, INDONESIA&lt;/p&gt;</style></auth-address></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Eriawan Rismana</style></author><author><style face="normal" font="default" size="100%">Sri Ningsih</style></author><author><style face="normal" font="default" size="100%">Fachry Fachrudin</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">In vitro Study of Xanthine Oxidase Inhibitory of Gambir (Uncaria gambir) Hunter Roxb Extracts</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">(+) Catechin.</style></keyword><keyword><style  face="normal" font="default" size="100%">Gambir (Uncaria gambir) Hunter Roxb</style></keyword><keyword><style  face="normal" font="default" size="100%">Inhibitory</style></keyword><keyword><style  face="normal" font="default" size="100%">Polyphenol</style></keyword><keyword><style  face="normal" font="default" size="100%">Xanthine Oxidase</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September 2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://fulltxt.org/article/188</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">862-865</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; Hyperuricemia was a metabolic disorder characterized by high levels of uric acid due to the action of the enzyme xanthine oxidase (XO). Some natural substances with antioxidant activity proved capable of inhibiting the activity of the enzyme XO. Pharmacological benefit of polyphenol compounds had been proved. Gambir (&lt;em&gt;Uncaria gambir&lt;/em&gt;) Hunter Roxb, a native plant, had been proved antioxidant activity, so that it had potential to be developed as an inhibitor of the XO. This study aimed to evaluate the activity of Gambir as XO inhibitor. &lt;strong&gt;Methods:&lt;/strong&gt; These extracts of Gambir were preparation from Gambir and Gambir leaf using ethanol 50% and ethanol 96%, respectively. The polyphenol content and Xanthine oxidase inhibitory activity was evaluated by spectrophotometry, meanwhile analysis of (+)catechin was determined by high pressure liquid chromatography (HPLC). &lt;strong&gt;Results:&lt;/strong&gt; Screening XO inhibitory activity &lt;em&gt;in vitro&lt;/em&gt; showed that ethanolic 96% extract of Gambir leaf showed the highest activity, i.e. 50% relative to standard allopurinol at the final concentration of 100 ppm. &lt;strong&gt;Conclusion:&lt;/strong&gt; There was no positive correlation between XO inhibitory activity and polyphenol or (+)catechin content.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">862</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Eriawan Rismana&lt;sup&gt;1*&lt;/sup&gt;, Sri Ningsih&lt;sup&gt;1&lt;/sup&gt;, Fachry Fachrudin&lt;sup&gt;2&lt;/sup&gt; &lt;/strong&gt;&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Center for Pharmaceutical and Medical Technology, Agency for the Asessment and Application of Technology (BPPT), Laptiab Laboratory, 610-611 Building, Kawasan Puspiptek Serpong, Tangerang, Banten-INDONESIA.&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Faculty of Medicine, National Islamic University, Tangerang , Banten-INDONESIA.&lt;/p&gt;</style></auth-address></record></records></xml>