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Pemeriksaan Parameter Mutu dan Uji Aktivitas Penghambatan Enzim α-Glukosidase dari Ekstrak Etanol 70% Daun Keji Beling (Sericocalyx Crispus (L.) Bremek) Djamil, Ratna; Kartika Pratami, Diah; Vidia Riyantika, Lola
Jurnal Jamu Indonesia Vol. 5 No. 1 (2020): Jurnal Jamu Indonesia
Publisher : Tropical Biopharmaca Research Center, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jji.v5i1.181

Abstract

Daun keji beling (Sericocalyx crispus (L.) Bremek) [Sinonim Strobilanthes crispa (L.)] merupakan salah satu tanaman yang secara empiris digunakan oleh masyarakat untuk membantu pengobatan. Menurut penelitian daun keji beling diketahui mempunyai khasiat sebagai antidiabetes. Penelitian ini bertujuan untuk mengidentifikasi golongan senyawa yang terkandung dalam ekstrak, mutu ekstrak dan aktivitas penghambatan enzim α-Glukosidase secara in vitro. Serbuk simplisia diekstraksi dengan pelarut etanol 70% secara maserasi kinetik, kemudian dilakukan penapisan fitokimia, penetapan mutu ekstrak dan uji aktivitas penghambatan enzim α-Glukosidase. Hasil penapisan menunjukkan ekstrak mengandung senyawa flavonoid, saponin, steroid dan triterpenoid. Hasil penetapan mutu ekstrak menunjukkan bentuk ekstrak kental berwarna hijau kehitaman; rasa pahit; kadar sari larut air 60,46%; kadar sari larut etanol 73,45%; kadar abu total 15,06%; kadar abu tidak larut asam 3,10%; kadar abu larut air 11,29%; kadar air 7,68%; susut pengeringan 9,25%; sisa pelarut 0,38%; kadar Pb 0,4941 bpj; kadar Cd 0,0222 bpj; Angka Lempeng Total (ALT) 4,52x102 koloni/g; Angka Kapang Kamir (AKK) terlalu sedikit untuk dihitung (TSUD); dan kadar flavonoid total 2,39%. Hasil uji aktivitas penghambatan enzim α-Glukosidase pada akarbose dan ekstrak kental keji beling menunjukkan IC50 masing-masing sebesar 50 bpj dan 86,2 bpj. Dapat disimpulkan ekstrak kental daun keji beling memenuhi persyaratan mutu ekstrak dan memiliki aktivitas sebagai penghambat enzim α-Glukosidase. Keji beling memiliki potensi untuk dikembangkan lebih lanjut sebagai obat herbal antidiabetes.
Penambatan Molekul Senyawa Swietemacrophyllanin dari Kulit Batang Mahoni (Swietenia macrophylla King,) sebagai Inhibitor Enzim Alfa Glukosidase Khaerunnisa, Arini; Djamil, Ratna; Sulastri, Lilik; Rudiana, Tarso; Simanjuntak, Partomuan
Pharmaceutical and Biomedical Sciences Journal (PBSJ) Vol. 5 No. 2 (2023)
Publisher : Pharmaceutical and Biomedical Sciences Journal (PBSJ)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/pbsj.v5i2.32926

Abstract

Mahogany (Swietenia macrophylla King.) is one of the plants used as an antidiabetic agent. 96% ethanol extract of S. macrophylla stem bark can inhibit the α-glucosidase enzyme. Methanol and aqueous extracts of S. macrophylla stem bark can reduce rat blood glucose levels induced by streptozotocin. Molecular docking is one of the most widely used structural-based drug design strategies due to its wide application in the analysis of binding energy and molecular interactions between drug compounds and receptors. This study aims to identify the compounds in the stem bark of S. macrophylla and analyze the molecular anchoring of the compounds produced by the aid. The research was carried out by means of the water fraction of the stem bark of S. macrophylla and was purified by column chromatography. Fraction 2 was identified by LCMS-MS. Molecular docking using AutoDock 4.2.6. The results of Fraction 2 showed the presence of catechins, evodionol, swietemacrophyllanin, swietenitin K and β-sitosterol. The results of an in-silico study showed that swietemacrophyllanin provided a better affinity than acarbose with a binding energy value of -8.57 kcal/mol and an inhibition constant of 0.52 µM. Forms hydrogen bonds with catalytic residues (Glu277 and Asp352) from the active site of the α-glucosidase enzyme. Swietemacrophyllanin has potential as an antidiabetic agent
Phytochemical profile, antioxidant activity, and sun protection potential of selected Annonaceae species Djamil, Ratna; Iskandar, Maria Clarissa; Pratami, Diah Kartika
JURNAL ILMU KEFARMASIAN INDONESIA Vol 23 No 2 (2025): JIFI
Publisher : Faculty of Pharmacy, Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/jifi.v23i2.1671

Abstract

Excessive sun exposure can damage the skin, highlighting the need for effective natural sunscreens. This study aimed to evaluate the phytochemical profile, antioxidant activity, total phenolic content (TPC), total flavonoid content (TFC), and sun protection factor (SPF) of five Annonaceae species. Methanolic leaf extracts of Annona muricata (soursop), Annona squamosa (sugar apple), Cananga odorata (cananga), Annona reticulata (nona), and Monoon longifolium (glodokan tiang) were analyzed. Phytochemical screening was performed to identify secondary metabolites. Antioxidant activity was determined using the DPPH radical scavenging assay, while TPC and TFC were measured spectrophotometrically. SPF values were calculated using the Mansur method. Phytochemical screening confirmed the presence of flavonoids, saponins, tannins, steroids, and phenolics in all extracts, with cananga leaves additionally containing alkaloids, coumarins, and essential oils. The DPPH assay showed antioxidant activity with IC₅₀ values ranging from 12.89–228.98 ppm, classified from very strong to weak. TPC and TFC values ranged from 12.33–31.75 mg GAE/g extract and 8.83–28.19 mg QE/g extract, respectively. SPF values ranged from 19.32–35.03, indicating all extracts fall under the ultra-protection category, with soursop leaf extract exhibiting the highest SPF. This study highlights the potential of Annonaceae leaf extracts, particularly A. muricata, as promising natural antioxidant and photoprotective agents due to their high polyphenolic and flavonoid content.