Antioxidant Activity and Neuroprotective Effect of Garcinia mangostana Pericarp Extracts on N1E–115 Cells
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Abstract
Abstract
Introduction and Objective: Oxidative stress plays a vital role in the pathophysiology of neurodegenerative diseases. Mangosteen (Garcinia mangostana L.) pericarp is rich in phenolic compounds, particularly xanthones, which possess potent antioxidant activities and may alleviate or delay neuronal degeneration. This study aimed to investigate the antioxidant and neuroprotective activities of G mangostana pericarp extracts against hydrogen peroxide (H2O2)–and glutamate–induced neurotoxicity in N1E–115 cells.
Methods: G. mangostana pericarp water extract (GM–W) and ethanol extract (GM–E), were evaluated for their antioxidant activity using a superoxide scavenging assay. Neuroprotective effects against H2O2 –and glutamate–induced injury were assessed using the 3–[4,5–dimethylthiazol–2–yl]–2,5–diphenyltetrazolium bromide (MTT) reduction assay. Furthermore, the underlying neuroprotective mechanisms were investigated by using specific inhibitors of the mitogen–activated protein kinase (MAPK) and phosphatidylinositol 3–kinase (PI3K) signaling pathways.
Results: GM–W and GM–E showed strong antioxidant activities with IC50 29.11 + 3.88 and 14.49 + 1.66 µg/mL, respectively. Co–exposure or pre–exposure to GM–E significantly reduced H2O2 –induced cell death, whereas GM–W showed no protective effect. For glutamate toxicity, only co–exposure with GM–E demonstrated neuroprotection. Additionally, the presence of MAPK and PI3K inhibitors significantly antagonized the neuroprotective effects of GM–E against both H2O2 –and glutamate–induced neurotoxicity.
Discussion: GM–E protected neuronal cells from H2O2 –and glutamate–induced toxicity. This neuroprotection is likely mediated through both direct antioxidant properties and the modulation of MAPK and PI3K signaling pathways. Study results indicate that natural antioxidants effectively reduce free radical–induced cellular damage, making them a promising alternative for preventing and delaying neurodegeneration.
Conclusion and Recommendation: These findings support the potential of mangosteen pericarp extract in protecting against H2O2 –and glutamate–induced neurotoxicity, suggesting their therapeutic role in preventing or delaying the progression of neurodegenerative diseases. Further studies in in vitro degenerative models with specific pathology and animal models on bioactive compound from mangosteen pericarp extracts and xanthone derivatives are required to clarify its activity and molecular mechanisms, as well as herbal product development into herbal medicinal products or herbal health products using nanotechnology.
Keywords : Garcinia mangostana L., antioxidant activity, neuroprotective activity, hydrogen peroxide, glutamate
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