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论文类型：期刊论文

发表时间：2013-03-01

发表刊物：TOXICOLOGY IN VITRO

收录刊物：SCIE、PubMed、Scopus

卷号：27

期号：2

页面范围：543-550

ISSN号：0887-2333

关键字：Catalpol; Astrocyte; Neuroinflammation; NF-kappa B; LPS

摘要：A large body of evidence suggests that the inflammatory reaction plays an important role in the pathogenesis of neurodegenerative diseases. Our previous studies described the neuroprotective effects of catalpol in lipopolysaccharide (LPS)-induced inflammatory models, in which catalpol was shown to prevent mesencephalic neuron death and ameliorate cognitive ability animals. To further investigate the protective effect and underlying mechanism of catalpol, astrocytes were pretreated with low (0.1 mM) and high dose (0.5 mM) catalpol for 1 h prior to LPS plus interferon-gamma stimulation. Biochemical analyses showed that NO and ROS production and iNOS activity were significantly reduced by catalpol. Data at transcriptional level also demonstrated that catalpol potently attenuated gene expressions involved in inflammation, such as iNOS, COX-2 and TLR4. In addition, our exploration further revealed that the suppressive action of catalpol on inflammation was mediated via inhibiting nuclear factor-kappa B (NF-kappa B) activation. Collectively, these results suggest that catalpol can exert inhibitory effects on the inflammatory reaction in astrocytes and that inactivation of NF-kappa B could be the major determinant for its anti-inflammatory mechanism. Therefore, catalpol may potentially be a highly effective therapeutic agent in treating neurodegenerative diseases associated with inflammation. (C) 2012 Elsevier Ltd. All rights reserved.