Abstract
Arsenic (As) as a neurotoxic environmental pollutant has attracted extensive attention. Curcumin (Cur) is a natural antioxidant that shows an excellent protective effect against arsenic trioxide (ATO)–induced toxicity in many animal organs. However, the mechanism of Cur against ATO-induced hypothalamic toxicity in ducks has not yet been fully elucidated. Here, ducks were treated with ATO and/or Cur during 28 days; the results showed that ATO exposure induced growth retardation, messy feathers, and abnormal posture in ducks. Moreover, ATO caused neuron vacuolar degeneration and disintegration in the hypothalamus of ducks. Simultaneously, ATO induced blood–brain barrier damage, downregulated the expression of ZO-1, Occludin, and mediated NF‐κB activation, resulting in an increase in inflammatory factors (TLR-4, NF-κB, TNF-α, IL-2, and IL-6). Furthermore, ATO increased the production of pyroptosis-related factors (Caspase-1, IL-18, IL-1), exacerbating the inflammatory damage through NLRP3-mediated inflammasome activation. Cur, on the other hand, exerted excellent inhibitory effects on inflammation and pyroptosis. In summary, our study revealed that ATO triggered inflammation and pyroptosis by modulating NF-κB/NLRP3 signaling pathways in the hypothalamus of ducks, and Cur can alleviate inflammation and pyroptosis caused by ATO. Therefore, as a plant extract, Cur has the potential to prevent and cure ATO-induced hypothalamus toxicity.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
References
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Conceptualization: Rao Gan, Haiyan Liu; methodology: Gan Rao, Shaofeng Wu; formal analysis and investigation: Gan Rao, Ning Zhang, Riming Huang; writing—original draft preparation: Lianmei Hu; writing—review and editing: Lianmei Hu, Riming Huang; funding acquisition: Zhaoxin Tang, Lianmei Hu; resources: Lianmei Hu; supervision: Lianmei Hu.
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Highlights
• Oral intake of ATO-triggered hypothalamic toxicity in ducks.
• ATO cross BBB and lead to inflammation and pyroptosis in hypothalamic of ducks.
• Cur alleviated ATOinduced poising in hypothalamic of ducks.
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Gan, R., Liu, H., Wu, S. et al. Curcumin Alleviates Arsenic Trioxide–Induced Inflammation and Pyroptosis via the NF-κB/NLRP3 Signaling Pathway in the Hypothalamus of Ducks. Biol Trace Elem Res 201, 2503–2511 (2023). https://doi.org/10.1007/s12011-022-03321-4
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DOI: https://doi.org/10.1007/s12011-022-03321-4