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Use of Viral Entry Assays and Molecular Docking Analysis for the Identification of Antiviral Candidates against Coxsackievirus A16
Published on: July 15, 2019
Inhibitory Activity and Docking Analysis of Antimalarial Agents from
Pratiwi Pudjiastuti1, Ni Nyoman T Puspaningsih1, Imam Siswanto1
1Department of Chemistry, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia.
Certain alkaloids from Stemona roots, like croomine, show potential as antimalarial agents by inhibiting Plasmodium falciparum ferredoxin-NADP+ reductases (PfFNR). Croomine effectively blocks electron transfer in PfFNR, suggesting a new therapeutic avenue.
Area of Science:
- Biochemistry
- Pharmacology
- Parasitology
Background:
- Ferredoxin-NADP+ reductases (FNRs) are present in Plasmodium plastids and represent a potential drug target for malaria treatment.
- Stemona alkaloids are natural products with diverse biological activities.
Purpose of the Study:
- To investigate the inhibitory effects of isolated Stemona alkaloids on Plasmodium falciparum ferredoxin-NADP+ reductase (PfFNR).
- To evaluate the antimalarial potential of these alkaloids.
Main Methods:
- Isolation of alkaloids (croomine, epi-croomine, tuberostemonine, javastemonine A, isoprotostemonine) from Stemona sp. roots.
- Enzyme inhibition assays measuring electron transfer and diaphorase activity of PfFNR.
- Molecular docking analysis to predict binding interactions.
Main Results:
- Croomine exhibited the highest inhibition (33.9%) of electron transfer from PfFNR to PfFd.
- Tuberostemonine showed the highest inhibition (55.4%) of PfFNR diaphorase activity.
- Docking studies indicated croomine binds within the PfFNR and PfFd interface.
Conclusions:
- Croomine and tuberostemonine demonstrate significant inhibitory effects on key enzymatic activities of PfFNR.
- Croomine from Stemona tuberosa shows promise as a potential antimalarial compound.
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