Table 1.
Number | Study | Experimental model | Part of the plant/preparation method | Outcome |
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1 | [19] | Ethnopharmacological survey | Decoction of leaves or bark | Predominately 60–80 years of age mostly females with primary and secondary education were aware of the use of E. hirta for dengue. |
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2 | [20] | Descriptive ethnobotanical survey | Expressed juice of E. hirta | A survey conducted using questionnaires in Agoo, La Union, Philippines revealed Tawa-Tawa is the most sought medicinal plant for dengue. |
In vivo assay on rabbits (Aspirin-induced thrombocytopenia) | Expressed juice of E. hirta | A significant increase of platelet count after 24 hours of administration of E. hirta juice into thrombocytopenic rabbits. | ||
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3 | [21] | In vivo assay on rats (ethanol (i.p injection) induced thrombocytopenic model) | Decoction of fresh whole plant | A significant increase of platelet counts after 14 days of administration of E. hirta, further reporting decreased bleeding time and clotting time of rats. |
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4 | [22] | In vivo assay using rats (thrombocytopenia was induced using Anagrelide) | Water extract of leaves | Mean platelet count was increased by 80% following E. hirta treatment for 9 days. |
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5 | [23] | Clinical study using dengue patients admitted to Sir Ganga Ram Hospital, Lahore. | Herbal water | Over 70% patients exhibited a platelet increase. Marked recovery in fever and flu like symptoms following 24 hours of administration of E. hirta. |
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6 | [25] | In vitro assay for DENV-2 serotype | Ethanol extract of leaves | Virus inhibition by 34.7%. |
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7 | [24] | In vitro assay | Tea of E. hirta and ethyl acetate/methanol and ethyl acetate partitioning. | The ethyl acetate fraction of whole plant of E. hirta extracted using methanol and dichloromethane significantly reduced (85%) the plaque forming capacity of dengue virus serotype 1. Nine compounds were isolated from the fraction. |
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8 | [26] | Molecular docking of phytochemicals with 2FOM-dengue proteases, 2P40-methyl transferase of dengue |
Leaves of E. hirta | Quercetin exhibited strongest binding with dengue virus. Thus, E. hirta can be indicated as effective against dengue virus. |