Nwidu, Lucky Legbosi, Elmorsy, Ekramy, Thornton, Jack, Wijamunige, Buddhika, Wijesekara, Anusha, Tarbox, Rebecca, Warren, Averil and Carter, Wayne
(2017)
Anti-acetylcholinesterase activity and antioxidant properties of extracts and fractions of Carpolobia lutea.
Pharmaceutical Biology, 55
(1).
pp. 1875-1883.
ISSN 1744-5116
Full text not available from this repository.
Abstract
Context: There is an unmet need to discover new treatments for Alzheimer’s disease. This study determined the anti-acetylcholinesterase (AChE) activity, DPPH free radical scavenging and antioxidant properties of Carpolobia lutea G. Don (Polygalaceae).
Objective: To quantify C. lutea anti-AChE, DPPH free radical scavenging, and antioxidant activities, and cell cytotoxicity.
Materials and methods: Plant stem, leaves, and roots were subjected to sequential solvent extractions, and screened for anti-AChE activity across a concentration range of 0.02-200 μg//mL. Plant DPPH radical scavenging activity, reducing power, and total phenolic and flavonoid content were determined, and cytotoxicity evaluated using human hepatocytes.
Results: C. lutea exhibited concentration dependent anti-AChE activity. The most potent inhibitory activity for the stem was the crude ethanol extract and hexane stem fraction oil (IC₅₀ = 140 μg/mL); for the leaves the chloroform leaf fraction (IC₅₀ = 60 μg/mL/mL); and for roots, the methanol, ethyl acetate, and aqueous root fractions (IC₅₀ = 0.3-3 μg/mL). Dose-dependent free radical scavenging activity and reducing power were observed with increasing stem, leaf, or root concentration. Total phenolics were highest in the stem: ~632 mg gallic acid equivalents/g for a hexane stem fraction oil. Total flavonoid content was highest in the leaves: ~297 mg quercetin equivalents/g for a chloroform leaf fraction. At 1 μg/mL, only the crude ethanol extract oil was significantly cytotoxic to hepatocytes.
Discussion and conclusion: C. lutea possesses anti-AChE activity and beneficial antioxidant capacity indicative of its potential development as a treatment of Alzheimer’s and other diseases characterized by a cholinergic deficit.
Actions (Archive Staff Only)
 |
Edit View |
Tools
Tools
