Please use this identifier to cite or link to this item: https://doi.org/10.1111/bph.12302
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dc.titleEmodin inhibits growth and induces apoptosis in an orthotopic hepatocellular carcinoma model by blocking activation of STAT3
dc.contributor.authorSubramaniam, A.
dc.contributor.authorShanmugam, M.K.
dc.contributor.authorOng, T.H.
dc.contributor.authorLi, F.
dc.contributor.authorPerumal, E.
dc.contributor.authorChen, L.
dc.contributor.authorVali, S.
dc.contributor.authorAbbasi, T.
dc.contributor.authorKapoor, S.
dc.contributor.authorAhn, K.S.
dc.contributor.authorKumar, A.P.
dc.contributor.authorHui, K.M.
dc.contributor.authorSethi, G.
dc.date.accessioned2014-11-26T07:44:29Z
dc.date.available2014-11-26T07:44:29Z
dc.date.issued2013-10
dc.identifier.citationSubramaniam, A., Shanmugam, M.K., Ong, T.H., Li, F., Perumal, E., Chen, L., Vali, S., Abbasi, T., Kapoor, S., Ahn, K.S., Kumar, A.P., Hui, K.M., Sethi, G. (2013-10). Emodin inhibits growth and induces apoptosis in an orthotopic hepatocellular carcinoma model by blocking activation of STAT3. British Journal of Pharmacology 170 (4) : 807-821. ScholarBank@NUS Repository. https://doi.org/10.1111/bph.12302
dc.identifier.issn00071188
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/109324
dc.description.abstractBackground and Purpose Aberrant activation of STAT3 is frequently encountered and promotes proliferation, survival, metastasis and angiogenesis in hepatocellular carcinoma (HCC). Here, we have investigated whether emodin mediates its effect through interference with the STAT3 activation pathway in HCC. Experimental Approach The effect of emodin on STAT3 activation, associated protein kinases and apoptosis was investigated using various HCC cell lines. Additionally, we also used a predictive tumour technology to analyse the effects of emodin. The in vivo effects of emodin were assessed in an orthotopic mouse model of HCC. Key Results Emodin suppressed STAT3 activation in a dose- and time-dependent manner in HCC cells, mediated by the modulation of activation of upstream kinases c-Src, JAK1 and JAK2. Vanadate treatment reversed emodin-induced down-regulation of STAT3, suggesting the involvement of a tyrosine phosphatase and emodin induced the expression of the tyrosine phosphatase SHP-1 that correlated with the down-regulation of constitutive STAT3 activation. Interestingly, silencing of the SHP-1 gene by siRNA abolished the ability of emodin to inhibit STAT3 activation. Finally, when administered i.p., emodin inhibited the growth of human HCC orthotopic tumours in male athymic nu/nu mice and STAT3 activation in tumour tissues. Conclusions and Implications Emodin mediated its effects predominantly through inhibition of the STAT3 signalling cascade and thus has a particular potential for the treatment of cancers expressing constitutively activated STAT3. © 2013 The British Pharmacological Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1111/bph.12302
dc.sourceScopus
dc.subjectapoptosis
dc.subjectemodin
dc.subjecthepatocellular carcinoma
dc.subjectproliferation
dc.subjectSTAT3
dc.typeArticle
dc.contributor.departmentCANCER SCIENCE INSTITUTE OF SINGAPORE
dc.contributor.departmentPHARMACOLOGY
dc.description.doi10.1111/bph.12302
dc.description.sourcetitleBritish Journal of Pharmacology
dc.description.volume170
dc.description.issue4
dc.description.page807-821
dc.description.codenBJPCB
dc.identifier.isiut000325139400010
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