Background: Schisandra chinensis (Turcz.) Baill (S. chinensis), a member of the Magnoliaceae family, is renowned for its distinctive medicinal attributes and is commonly employed in the treatment of disorders affecting the CNS.
Purpose: The potential therapeutic effects of a lignan-enriched extract derived from Schisandra chinensis (Turcz.) Baill (LSC) on PD is assessed, which focuses on its mechanisms of action in addressing neuroinflammation.
Methods: The LSC has been obtained by purifying the ethyl alcohol extract of S. chinensis. The Orbitrap-MS method has been employed to analyze the chemical composition of the LSC. In LPS-induced BV2 cells, LSC-induced changes in M1/M2 type inflammatory cytokines have been examined using the Griess reaction, Elisa, JC-1, flow cytometry, IF, and WB methods. A model of PD has been established by treatment of MPTP in C57BL/6 mice. The effect of LSC on behavioral changes, inflammatory factor levels, expression of TH and IBA-1, and production of autophagy in the midbrain has been investigated by TEM, immunohistochemistry, Elisa, and WB.
Results: LSC has relieved sports injuries and pathological damage, and targeted the TRPV1-AMPK-NLRP3 signaling pathway, which affected neuroinflammation and autophagy in vivo. Furthermore, in vitro investigations demonstrated that LSC has activated M1/M2 transformation, its related inflammatory factors, and protein expressions of the NLRP3-Caspase1 signaling pathway in LPS-BV2 cells. The research notably demonstrated that the LSC promoted autophagy and suppressed inflammation through targeting TRPV1.
Conclusion: In the investigation, LSC focused on TRPV1 and controlled neuroinflammation-autophagy by regulating AMPK-NLRP3, which has been proven for the first time. The study has presented molecular data supporting the use of LSC in treating PD and offers references for developing drugs. Remarkably, LSC has the potential to be utilized as a therapeutic or health medication that could significantly decrease PD.
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