@article {2028, title = {Optimization of Xanthine Oxidase Activity, Phytochemical Screening, Toxicity Assay, and Antigout Activity of Spatholobus littoralis Hassk. Extract}, journal = {Pharmacognosy Journal}, volume = {15}, year = {2023}, month = {June 2023}, pages = {258-269}, type = {Original Article }, chapter = {258}, abstract = {

Introduction: A medicinal plant from Central Kalimantan, Spatholobus littoralis 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 S. littoralis Hassk. Methods: 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 (LC50) on both extracts was assessed by BSLT (Brine Shrimp Lethality Test). The two extracts were then evaluated for antigout activity. Results: 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 {\textcelsius}, pH of 8.0, and xanthine concentration of 1.40 mM. The toxicity of the 70\% ethanol extract (LC50 662.25 mg/L) was stronger than the aqueous extract (LC50 774.68 mg/L). Moreover, the 70\% ethanol extract (IC50 224.14{\textpm}8.62 mg/L) showed higher XO inhibition than the water extract (IC50 348.83{\textpm}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. Conclusion: This preliminary study can be a reference that S. littoralis Hassk. is potentially an antigout.

}, keywords = {Box-Behnken Design, Gout, Lineweaver-Burk plot, Spatholobus littoralis Hassk, Xanthine Oxidase.}, doi = {10.5530/pj.2023.15.72}, author = {Min Rahminiwati and Rut Novalia Rahmawati Sianipar and Komar Sutriah and Dyah Iswantini and Trivadila and Suminar Setiati Achmadi and Ibnu Hari Sulistyawan} } @article {1789, title = {Inhibitory Capacity of Xanthine Oxidase in Antigout Therapy by Indonesian Medicinal Plants}, journal = {Pharmacognosy Journal}, volume = {14}, year = {2022}, month = {April 2022}, pages = {470-479}, type = {Review Article}, chapter = {470}, abstract = {

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{\textpm}1.16\% to 97.53\%. The lowest inhibitory power of 50.00{\textpm}1.16\% was in Phaleria macrocarpa, 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 Sida rhombifolia, Syzygium polyanthum, Cyperus rotundus, Ruellia tuberosa and Phaleria macrocarpa.

}, keywords = {Competitive inhibition kinetics, Flavonoid, Gout, Indonesia, Xanthine Oxidase}, doi = {10.5530/pj.2022.14.60}, author = {Rut Novalia Rahmawati Sianipar and Komar Sutriah and Dyah Iswantini and Suminar Setiati Achmadi} } @article {1318, title = {Vietnamese Medicinal Plants Useful in Treatments of Gout}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {November 2020}, pages = {1693-1697}, type = {Research Article}, chapter = {1693}, abstract = {

Gout is a metabolic pathology associated with an increase in the concentration of uric acid in the blood, characterized by episodes of acute arthritis or chronic arthritis caused by deposition of mononatri urate crystals in joints and connective tissue. Long ago, gout was considered a rare disease and a disease of the rich. Since the early years of the 21st century, the incidence of gout and increased uric acid is increasing rapidly around the world. Clinical manifestations of the disease, the age and gender of the patient, related diseases, response to treatment, adverse consequences of the disease, its association with cardiovascular disease, kidney disease, etc. There are many changes in the negative direction that make the disease become incurable in many patients. Even in developed countries, the disease is not managed and monitored closely, increasing the rate of illness, death, disability and quality of life. The article focuses on the causes, manifestations of gout and, most importantly, the introduction of some herbs used in Vietnam. The scientific components, its effective effects have been confirmed by some documents and trusted by patients.

}, keywords = {Gout, Health, Medicinal herbs, Treatment}, doi = {10.5530/pj.2020.12.228}, author = {Huynh Tan Hoi} }