Dengue hemorrhagic fever (DHF) is major public health problem in tropical and subtropical areas of the world with lack of approved vaccines and effective antiviral therapies. With no current treatment for illness attributed to dengue virus (DENV) infection other than supportive care, therapeutic strategies that use natural extract was developed.Indonesia have many plants that potential for antiviral drµgs such as Pterocarpus indicus Willd (P. indicus). The objective of this study was to determine the effect of P. indicus to inhibit DENV replication. We used a welldifferentiated hepatocytes-derived cellular carcinoma cell line (Huh-7 it-1 cells) to determine and select antiviral activity. The toxicity effects were determined by MTT assay. Then, the suppression of DENV replication was determined by Focus assay. Dengue infected cells with DMSO were used as control. We found that crude extract (Pi), hexane (Pi.1) and ethyl acetate (Pi.2) extract showed strong inhibition with high selectivity index (SI) of 1,392; 285.36 and 168.56 respectively. Sub fraction of Pi.1 and Pi.2 still showed strong inhibition with high SI. Further sub-sub fraction of Pi.2 such as Pi.2.12 and Pi.2.12.1 still showed inhibition of DENV replication but there was reduction of SI value. The mechanism experiment of Pi.2.12, we found that Pi 2.12 more profound to inhibit in the post infection stage that entry or pre-infection. We conclude that the sub-fraction of Pi.2.12 has potential antiviral activity against DV infection in vitro. Further studies are still needed to investigate the pure compound of Pi.2.12 that inhibit and have advantages in the future as alternative for treatment of DENV infection.
Spons merupakan fauna laut yang diketahui memiliki berbagai senyawa bioaktif. Senyawa tersebut berpotensi sebagai antibakteri, antivirus, dan antikanker. Penelitian ini bertujuan mempelajari aktivitas sitotoksik dan apoptosis ekstrak spons spesies A anggota ordo Astrophorida terhadap sel HeLa. Pada penelitian ini pengujian aktivitas sitotoksik ekstrak etanolik, metanolik, dan kloroform spons spesies A terhadap sel HeLa dilakukan menggunakan MTT assay dan uji apoptosis menggunakan double staining, yaitu etidium bromida-acridine orange. Deteksi golongan senyawa yang terkandung di dalam spons spesies A dilakukan menggunakan Kromatografi Lapis Tipis (KLT). Hasil uji sitotoksisitas menunjukkan bahwa ekstrak etanolik, metanolik, dan kloroform spons spesies A masing-masing memiliki nilai IC50 sebesar 18,25; 27,87; dan 13,87 µg/mL. Ekstrak etanolik, metanolik, dan kloroform spons spesies A pada konsentrasi 31,25 µg/mL dapat menginduksi kematian sel melalui apoptosis masing-masing sebesar 35,3 ± 11,16%; 82,64 ± 16,21%; dan 86,76 ± 9,27%. Berdasarkan uji menggunakan KLT diketahui bahwa spons spesies A menggandung golongan senyawa alkaloid, flavonoid, fenol, dan terpenoid. Oleh karena itu, dapat disimpulkan bahwa ekstrak spons spesies A berpotensi untuk dikembangkan sebagai obat antikanker.Kata kunci: ekstrak spons spesies A, sitotoksik, apoptosis, sel HeLa
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