<?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%">Min Rahminiwati</style></author><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%">Trivadila</style></author><author><style face="normal" font="default" size="100%">Suminar Setiati Achmadi</style></author><author><style face="normal" font="default" size="100%">Ibnu Hari Sulistyawan</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Optimization of Xanthine Oxidase Activity, Phytochemical Screening, Toxicity Assay, and Antigout Activity of Spatholobus littoralis Hassk. Extract</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%">Box-Behnken Design</style></keyword><keyword><style  face="normal" font="default" size="100%">Gout</style></keyword><keyword><style  face="normal" font="default" size="100%">Lineweaver-Burk plot</style></keyword><keyword><style  face="normal" font="default" size="100%">Spatholobus littoralis Hassk</style></keyword><keyword><style  face="normal" font="default" size="100%">Xanthine Oxidase.</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">June 2023</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">15</style></volume><pages><style face="normal" font="default" size="100%">258-269</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;&lt;strong&gt;Introduction&lt;/strong&gt;: A medicinal plant from Central Kalimantan, &lt;em&gt;Spatholobus littoralis &lt;/em&gt;Hassk., with a local name bajakah tampala, has long been used to treat gout or uric acid disease. This study aimed to develop the optimum conditions of xanthine oxidase (XO) activity, phytochemical screening, and to obtain the antigout activity of &lt;em&gt;S. littoralis &lt;/em&gt;Hassk.&lt;strong&gt; Methods:&lt;/strong&gt; Before performing the phytochemical screening, we performed a simplicia maceration with water and 70% ethanol solvents. The development of the optimum conditions for XO was carried out using the Response Surface Methodology (RSM) combined Box-Behnken Design (BBD). Toxicity assay (LC&lt;sub&gt;50&lt;/sub&gt;) on both extracts was assessed by BSLT (Brine Shrimp Lethality Test). The two extracts were then evaluated for antigout activity. &lt;strong&gt;Results:&lt;/strong&gt; The yield of 70% ethanol extract (11.24%) was higher than the aqueous extract (7.29%). The phytochemical screening on the simplicia and the two extracts positively contained steroids, flavonoids, saponins, and tannins. The optimum conditions of XO activity were temperature of 20 ℃, pH of 8.0, and xanthine concentration of 1.40 mM. The toxicity of the 70% ethanol extract (LC&lt;sub&gt;50&lt;/sub&gt; 662.25 mg/L) was stronger than the aqueous extract (LC&lt;sub&gt;50&lt;/sub&gt; 774.68 mg/L). Moreover, the 70% ethanol extract (IC&lt;sub&gt;50 &lt;/sub&gt;224.14±8.62 mg/L) showed higher XO inhibition than the water extract (IC&lt;sub&gt;50&lt;/sub&gt; 348.83±4.85 mg/L). Lineweaver-Burk plot analysis showed that 70% ethanol and water extracts inhibited XO competitively with the inhibition constant (KI) of 272.68 mg/L and 378.44 mg/L, respectively. &lt;strong&gt;Conclusion:&lt;/strong&gt; This preliminary study can be a reference that &lt;em&gt;S. littoralis&lt;/em&gt; Hassk. is potentially an antigout.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><work-type><style face="normal" font="default" size="100%">Original Article </style></work-type><section><style face="normal" font="default" size="100%">258</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Min Rahminiwati&lt;sup&gt;1,3,*&lt;/sup&gt;, Rut Novalia Rahmawati Sianipar&lt;sup&gt;2&lt;/sup&gt;, Komar Sutriah&lt;/strong&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;strong&gt;, Dyah Iswantini&lt;sup&gt;2,3,*&lt;/sup&gt;, Trivadila&lt;sup&gt;2,3&lt;/sup&gt;, Suminar Setiati Achmadi&lt;sup&gt;2,3&lt;/sup&gt;, Ibnu Hari Sulistyawan&lt;sup&gt;4&lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Anatomy, Physiology, and Pharmacology, Veterinary Medicine and Biomedical School, IPB University, Bogor 16680, INDONESIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&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;3&lt;/sup&gt;Tropical Biopharmaca Research Center, IPB University, Bogor 16128, INDONESIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;4&lt;/sup&gt;Laboratory of Poultry Production, Faculty of Animal Science, Jenderal Soedirman University, Purwokerto 53122, INDONESIA.&lt;/p&gt;
</style></auth-address></record></records></xml>