Resveratrol prevents cadmium activation of Erk1/2 and JNK pathways from neuronal cell death via protein phosphatases 2A and 5. (2nd September 2015)

• Record Type: Journal Article
• Authors: Liu, Chunxiao; Zhang, Ruijie; Sun, Chenxia; Zhang, Hai; Xu, Chong; Liu, Wen; Gao, Wei; Huang, Shile; Chen, Long
• Is Part Of: Journal of neurochemistry. Volume 135:Number 3(2015:Nov.)
• Page Start: 466
• Page End: 478
• Publication Date: 2015-09-02
• Subjects: Neurochemistry -- Periodicals; 616.8042
• DOI: 10.1111/jnc.13233
• Languages: English
• ISSNs: 0022-3042

Abstract

<abstract abstract-type="main" id="jnc13233-abs-0001"> <title>Abstract</title> <sec id="jnc13233-sec-1001" sec-type="section"> <p>Cadmium (Cd), a toxic environmental contaminant, induces neurodegenerative disorders. Resveratrol, a natural product, has been found to exert neuroprotective effects. However, little is known regarding the effect of resveratrol on Cd‐evoked neurotoxicity. Here, we show that resveratrol effectively reversed Cd‐elicited cell viability reduction, morphological change, nuclear fragmentation and condensation, as well as activation of caspase‐3 in neuronal cells, implying neuroprotection against Cd‐poisoning by resveratrol. Further research revealed that both c‐Jun N‐terminal kinase (JNK) and extracellular signal‐regulated kinases 1/2 (Erk1/2) were involved in the inhibitory effect of resveratrol on Cd‐induced cell death, as selective inhibitors of Erk1/2 (U0126) and JNK (SP600125), or over‐expression of dominant negative mitogen‐activated protein kinase kinase 1 (MKK1) or dominant negative c‐Jun potentiated resveratrol's prevention of Cd‐induced phosphorylation of JNK and Erk1/2, as well as cell death in neuronal cells. Interestingly, resveratrol potently rescued the cells from Cd‐induced suppression of protein phosphatases 2A (PP2A) and 5 (PP5) activity. Over‐expression of PP2A or PP5 strengthened the inhibitory effects of resveratrol on Cd‐induced activation of Erk1/2 and/or JNK, as well as cell death. The results indicate that resveratrol prevents Cd‐induced activation of Erk1/2 and JNK pathways and neuronal cell death in part via activating PP2A and PP5. Our findings strongly support the notion that resveratrol may serve as a potential therapeutic agent in the prevention of Cd‐induced neurodegenerative diseases.</p> </sec> <sec id="jnc13233-sec-1002" sec-type="section"> <p> <boxed-text content-type="graphic" id="jnc13233-blkfxd-0002" position="anchor" orientation="portrait"> <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgkss1fj75" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /> </boxed-text> Resveratrol, a natural polyphenol compound, has been found to exert neuroprotective effects. This study uncovers that resveratrol prevents cadmium (Cd)‐induced activation of Erk1/2 and JNK pathways and neuronal cell death via activating PP2A and PP5. The findings propose that resveratrol may serve as a potential therapeutic agent in the prevention of Cd‐induced neurodegenerative diseases. </p> </sec> </abstract>