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      Penambatan Molekul Senyawa Aktif Flavonoid Daun Katuk (Sauropus androgynus) sebagai Anti-inflamasi terhadap Enzim COX-2

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      Date
      2023
      Author
      Khasanah, Uswatun
      Seno, Djarot Sasongko Hami
      Purwanto, Ukhradiya Magharaniq Safira
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      Abstract
      Cyclooxygenase-2 (COX-2) merupakan enzim pro-inflamasi yang memproduksi prostaglandin. Senyawa flavonoid memiliki peran antiinflamasi berdasarkan uji in vitro dan in vivo. Penelitian ini bertujuan menganalisis interaksi hasil penambatan molekul senyawa aktif flavonoid katuk terhadap enzim COX-2. Penelitian dilakukan dengan metode in silico menggunakan program YASARA structure. Senyawa flavonoid yang digunakan sebagai ligan uji yaitu, apigenin, caffeic acid, chlorogenic acid, ferulic acid, kaempferol, luteolin, myricetin, quercetin dan senyawa hasil isolasi yaitu, sauropunol A, B, C dan D. Ligan alami polmacoxib digunakan sebagai ligan kontrol. Semua ligan uji lolos dalam uji farmakologi, namun beberapa ligan tidak layak dalam uji toksisitas. Seluruh ligan uji kecuali sauropunol C dan D, berinteraksi pada sisi aktif COX-2 (PDB ID:5GMN), yaitu Val509, His94, Ser530, Asn62, Thr198, Thr199, Trp5 dan Gln92. Kaempferol berpotensi dalam menghambat COX-2 dengan ΔG -5,1400 kkal/mol, Kd 0,1691 µM, satu ikatan hidrogen, enam interaksi hidrofobik. Sedangkan ligan kontrol polmacoxib memiliki nilai ΔG lebih rendah, yaitu -2,3050 kkal/mol dengan Kd 20,3492 µM, tiga ikatan hidrogen, delapan ikatan hidrofobik.
       
      Cyclooxygenase-2 (COX-2) is a pro-inflammatory enzyme that produces prostaglandins. Flavonoid compounds have anti-inflammatory roles based on in vitro and in vivo tests. This study aimed to analyze the interaction of active flavonoid compounds from katuk with COX-2 enzymes through molecular docking. The study was conducted using in silico methods by YASARA structure program. Flavonoid compounds used as test ligands are apigenin, caffeic acid, chlorogenic acid, ferulic acid, kaempferol, luteolin, myricetin, quercetin and isolated compounds sauropunol A, B, C and D. The natural ligand polmacoxib was used as a control ligand. All ligands passed pharmacological tests, but some ligands were not suitable for toxicity tests. All ligands except sauropunol C and D interacted with active site of COX-2 (Val509, His94, Ser530, Asn62, Thr198, Thr199, Trp5, Gln92). Kaempferol has the potential to inhibit COX-2 with ΔG -5.1400 kcal/mol, Kd 0.1691 µM, one hydrogen bond and six hydrophobic interactions. Meanwhile, the polmacoxib control ligand has a lower ΔG value of -2.3050 kcal/mol with Kd 20.3492 µM, three hydrogen bonds and eight hydrophobic bonds.
       
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      http://repository.ipb.ac.id/handle/123456789/122911
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