Astaxanthin reduces isoflurane-induced neuroapoptosis via the PI3K/Akt pathway

Wang,Chun‑Mei; Cai,Xiao‑Lan; Wen,Qing‑Ping

doi:10.3892/mmr.2016.5035

Astaxanthin reduces isoflurane-induced neuroapoptosis via the PI3K/Akt pathway

Authors:
- Chun‑Mei Wang
- Xiao‑Lan Cai
- Qing‑Ping Wen
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Affiliations: Department of Anesthesiology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
Published online on: March 21, 2016 https://doi.org/10.3892/mmr.2016.5035
Pages: 4073-4078

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Abstract

Astaxanthin is an oxygen-containing derivative of carotenoids that effectively suppresses reactive oxygen and has nutritional and medicinal value. The mechanisms underlying the effects of astaxanthin on isoflurane‑induced neuroapoptosis remain to be fully understood. The present study was conducted to evaluate the protective effect of astaxanthin to reduce isoflurane‑induced neuroapoptosis and to investigate the underlying mechanisms. The results demonstrated that isoflurane induced brain damage, increased caspase‑3 activity and suppressed the phosphatidylinositol 3‑kinase (PI3K)/protein kinase B (Akt) signaling pathway in an in vivo model. However, treatment with astaxanthin significantly inhibited brain damage, suppressed caspase‑3 activity and upregulated the PI3K/Akt pathway in the isoflurane‑induced rats. Furthermore, isoflurane suppressed cell growth, induced cell apoptosis, enhanced caspase‑3 activity and downregulated the PI3K/Akt pathway in organotypic hippocampal slice culture. Administration of astaxanthin significantly promoted cell growth, reduced cell apoptosis and caspase‑3 activity, and upregulated the PI3K/Akt pathway and isoflurane‑induced neuroapoptosis. The present study demonstrated that downregulation of the PI3K/Akt pathway reduced the effect of astaxanthin to protect against isoflurane‑induced neuroapoptosis in the in vitro model. The results of the current study suggested that the protective effect of astaxanthin reduces the isoflurane-induced neuroapoptosis via activation of the PI3K/Akt signaling pathway.

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