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Anti-plasmodial activity of aqueous neem leaf extract mediated green synthesis-based silver nitrate nanoparticles. 2022

Siti Zulaiha Ghazali, and Noor Rasyila Mohamed Noor, and Khairul Mohd Fadzli Mustaffa
Institute of Research in Molecular Medicine, (INFORMM), Health Campus Universiti Sains Malaysia (USM), Kelantan, Malaysia.

The objective of this study is to synthesize neem-silver nitrate nanoparticles (neem-AgNPs) using aqueous extracts of Azadirachta indica A. Juss for malaria therapy. Neem leaves collected from FRIM Malaysia were authenticated and extracted using Soxhlet extraction method. The extract was introduced to 1 mM of silver nitrate solution for neem-AgNPs synthesis. Synthesized AgNPs were further characterized by ultraviolet-visible spectroscopy and the electron-scanning microscopy. Meanwhile, for the anti-plasmodial activity of the neem-AgNPs, two lab-adapted Plasmodium falciparum strains, 3D7 (chloroquine-sensitive), and W2 (chloroquine-resistant) were tested. Red blood cells hemolysis was monitored to observe the effects of neem-AgNPs on normal and parasitized red blood cells. The synthesized neem-AgNPs were spherical in shape and showed a diameter range from 31-43 nm. When compared to aqueous neem leaves extract, the half inhibitory concentration (IC50) of the synthesized neem-AgNPs showed a four-fold IC50 decrease against both parasite strains with IC50 value of 40.920 µg/mL to 8.815 µg/mL for 3D7, and IC50 value of 98.770 µg/mL to 23.110 µg/mL on W2 strain. The hemolysis assay indicates that the synthesized neem-AgNPs and aqueous extract alone do not have hemolysis activity against normal and parasitized red blood cells. Therefore, this study shows the synthesized neem-AgNPs has a great potential to be used for malaria therapy.

UI MeSH Term Description Entries
D010936 Plant Extracts Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard. Herbal Medicines,Plant Extract,Extract, Plant,Extracts, Plant,Medicines, Herbal
D010963 Plasmodium falciparum A species of protozoa that is the causal agent of falciparum malaria (MALARIA, FALCIPARUM). It is most prevalent in the tropics and subtropics. Plasmodium falciparums,falciparums, Plasmodium
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000962 Antimalarials Agents used in the treatment of malaria. They are usually classified on the basis of their action against plasmodia at different stages in their life cycle in the human. (From AMA, Drug Evaluations Annual, 1992, p1585) Anti-Malarial,Antimalarial,Antimalarial Agent,Antimalarial Drug,Anti-Malarials,Antimalarial Agents,Antimalarial Drugs,Agent, Antimalarial,Agents, Antimalarial,Anti Malarial,Anti Malarials,Drug, Antimalarial,Drugs, Antimalarial
D012835 Silver Nitrate A silver salt with powerful germicidal activity. It has been used topically to prevent OPHTHALMIA NEONATORUM. Alcoholic Silver Nitrate,Silver Nitrate, Silver (2+) Salt (2:1),Silver Nitrate, Alcoholic
D016778 Malaria, Falciparum Malaria caused by PLASMODIUM FALCIPARUM. This is the severest form of malaria and is associated with the highest levels of parasites in the blood. This disease is characterized by irregularly recurring febrile paroxysms that in extreme cases occur with acute cerebral, renal, or gastrointestinal manifestations. Plasmodium falciparum Malaria,Malaria, Plasmodium falciparum
D053758 Nanoparticles Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging. Nanocrystalline Materials,Nanocrystals,Material, Nanocrystalline,Materials, Nanocrystalline,Nanocrystal,Nanocrystalline Material,Nanoparticle
D055772 Green Chemistry Technology Pollution prevention through the design of effective chemical products that have low or no toxicity and use of chemical processes that reduce or eliminate the use and generation of hazardous substances. Environmentally Friendly Chemical Techniques,Environmentally Friendly Chemical Technology,Environmentally Friendly Chemistry Technology,Green Chemical Techniques,Sustainable Chemistry Technology,Chemical Technique, Green,Chemical Techniques, Green,Chemistry Technologies, Green,Chemistry Technologies, Sustainable,Chemistry Technology, Green,Chemistry Technology, Sustainable,Green Chemical Technique,Green Chemistry Technologies,Sustainable Chemistry Technologies,Technique, Green Chemical,Techniques, Green Chemical,Technologies, Green Chemistry,Technologies, Sustainable Chemistry,Technology, Green Chemistry,Technology, Sustainable Chemistry
D031601 Azadirachta A plant genus of the family MELIACEAE. Members contain azadirachtin A (a limonoid commonly referred to as azadirachtin) and other TRITERPENES. They have been used in PESTICIDES. The old name of Melia azadirachta is very similar to a related plant, MELIA AZEDARACH. Melia azadirachta,Neem Tree,Azadirachta indica,Azadirachta indicas,Azadirachtas,Melia azadirachtas,Neem Trees,Tree, Neem,Trees, Neem,azadirachtas, Melia,indicas, Azadirachta

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