Abstract
Neuroinflammation plays a significant role in various chronic and acute pathological conditions of the central nervous system. In the Indian system of medicine, Pluchea lanceolata is used to treat the neurological disorders. We investigated the effect of major pentacyclic triterpene and its naturally occurring acetate derivative isolated from P. lanceolata on lipopolysaccharide (LPS)-stimulated neuroinflammatory condition associated to inflammatory cytokine production in rat astrocytoma cell line (C6). The log concentration dependence of Pluchea bioactive taraxasterol (Tx) significantly (p < 0.05) attenuates the release of pro-inflammatory cytokines, such as TNF-α, IFN-γ, and IL-6, while its in situ produced acetyl derivative, i.e., taraxasterol acetate (TxAc), did not inhibit the LPS-induced IL-6 production at lower concentration (p > 0.05). Surflex-Dock molecular modeling study was performed to simulate the binding capacity of compounds into the active site of the TNF-α (2AZ5), tumor protein P53 (2VUK), and NF-kappa-B (1RAM). The differential inhibition of cytokines by Tx and TxAc was further confirmed by high docking scores showing the high affinity to target proteins. Findings of the study demonstrated the comparatively greater role of Pluchea triterpene than its in situ produced acetate derivate in neuroinflammation-associated disorders.
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