Casticin induces growth suppression and cell cycle arrest through activation of FOXO3a in hepatocellular carcinoma

Casticin, a polymethoxyflavone, has been reported to exert anticancer activities. The objectives of this study were to examine the molecular mechanisms by which casticin induces the growth inhibition and cell cycle arrest in human hepatocellular carcinoma (HCC) cells. The HCC cell lines Hep G2 and P...

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Veröffentlicht in:Oncology reports 2013-01, Vol.29 (1), p.103-108
Hauptverfasser: HE, LIHUA, YANG, XIAOHONG, CAO, XIAOCHENG, LIU, FEI, QUAN, MEIFANG, CAO, JIANGUO
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container_end_page 108
container_issue 1
container_start_page 103
container_title Oncology reports
container_volume 29
creator HE, LIHUA
YANG, XIAOHONG
CAO, XIAOCHENG
LIU, FEI
QUAN, MEIFANG
CAO, JIANGUO
description Casticin, a polymethoxyflavone, has been reported to exert anticancer activities. The objectives of this study were to examine the molecular mechanisms by which casticin induces the growth inhibition and cell cycle arrest in human hepatocellular carcinoma (HCC) cells. The HCC cell lines Hep G2 and PLC/PRF/5 were cultured in vitro. The growth inhibitory effects of casticin were evaluated using clonogenic assays. The distribution of phases in the cell cycle was analyzed using flow cytometry (FCM) analysis with propidium iodide (PI) staining. Multiple molecular techniques, such as western blotting and gene transfection, were used to explore the molecular mechanisms of action. Our data demonstrated that casticin significantly inhibited cell viability and colony formation in HCC cells. Furthermore, it induced cell cycle arrest in the G2/M phase. Casticin inhibited phosphorylation of the FOXO3a protein and decreased the expression of FoxM1 and its downstream genes, such as cyclin-dependent kinase (CDK1), CDC25B and cyclin B and increased the expression of p27KIP1. Silencing of FOXO3a expression by small interfering RNA (siRNA) transfection clearly attenuated the inhibitory effects of casticin on FOXM1 expression and cell growth. Our findings provided clear evidence that casticin induces growth suppression and cell cycle arrest through inhibition of FOXO3a phosphorylation causing inactivation of FOXM1 in HCC cells.
doi_str_mv 10.3892/or.2012.2076
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The objectives of this study were to examine the molecular mechanisms by which casticin induces the growth inhibition and cell cycle arrest in human hepatocellular carcinoma (HCC) cells. The HCC cell lines Hep G2 and PLC/PRF/5 were cultured in vitro. The growth inhibitory effects of casticin were evaluated using clonogenic assays. The distribution of phases in the cell cycle was analyzed using flow cytometry (FCM) analysis with propidium iodide (PI) staining. Multiple molecular techniques, such as western blotting and gene transfection, were used to explore the molecular mechanisms of action. Our data demonstrated that casticin significantly inhibited cell viability and colony formation in HCC cells. Furthermore, it induced cell cycle arrest in the G2/M phase. Casticin inhibited phosphorylation of the FOXO3a protein and decreased the expression of FoxM1 and its downstream genes, such as cyclin-dependent kinase (CDK1), CDC25B and cyclin B and increased the expression of p27KIP1. Silencing of FOXO3a expression by small interfering RNA (siRNA) transfection clearly attenuated the inhibitory effects of casticin on FOXM1 expression and cell growth. Our findings provided clear evidence that casticin induces growth suppression and cell cycle arrest through inhibition of FOXO3a phosphorylation causing inactivation of FOXM1 in HCC cells.</description><identifier>ISSN: 1021-335X</identifier><identifier>EISSN: 1791-2431</identifier><identifier>DOI: 10.3892/or.2012.2076</identifier><identifier>PMID: 23064420</identifier><language>eng</language><publisher>Greece: D.A. Spandidos</publisher><subject>Apoptosis ; Blotting, Western ; Cancer therapies ; Carcinoma, Hepatocellular - drug therapy ; Carcinoma, Hepatocellular - metabolism ; Carcinoma, Hepatocellular - pathology ; casticin ; Cell cycle ; Cell Cycle Checkpoints - drug effects ; Cell Proliferation - drug effects ; Cell Survival - drug effects ; Cyclin B - metabolism ; Cyclin-Dependent Kinase Inhibitor p27 - metabolism ; Cyclin-dependent kinases ; Flavonoids - pharmacology ; Forkhead Box Protein M1 ; Forkhead Box Protein O3 ; Forkhead Transcription Factors - antagonists &amp; inhibitors ; Forkhead Transcription Factors - genetics ; Forkhead Transcription Factors - metabolism ; FOXM1 ; FOXO3a ; Gene Expression Regulation, Neoplastic ; hepatocellular carcinoma ; Humans ; Investigations ; Kinases ; Liver cancer ; Liver Neoplasms - drug therapy ; Liver Neoplasms - metabolism ; Liver Neoplasms - pathology ; Medical prognosis ; Phosphorylation ; Proto-Oncogene Proteins c-akt - metabolism ; RNA, Small Interfering - genetics ; Transcription factors ; Tumor Cells, Cultured</subject><ispartof>Oncology reports, 2013-01, Vol.29 (1), p.103-108</ispartof><rights>Copyright © 2013, Spandidos Publications</rights><rights>Copyright Spandidos Publications UK Ltd. 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-53dda9ff77fe0864d1c0e964a9a9df772cd5a078aa57468a4e969fa774481fdc3</citedby><cites>FETCH-LOGICAL-c388t-53dda9ff77fe0864d1c0e964a9a9df772cd5a078aa57468a4e969fa774481fdc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23064420$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>HE, LIHUA</creatorcontrib><creatorcontrib>YANG, XIAOHONG</creatorcontrib><creatorcontrib>CAO, XIAOCHENG</creatorcontrib><creatorcontrib>LIU, FEI</creatorcontrib><creatorcontrib>QUAN, MEIFANG</creatorcontrib><creatorcontrib>CAO, JIANGUO</creatorcontrib><title>Casticin induces growth suppression and cell cycle arrest through activation of FOXO3a in hepatocellular carcinoma</title><title>Oncology reports</title><addtitle>Oncol Rep</addtitle><description>Casticin, a polymethoxyflavone, has been reported to exert anticancer activities. The objectives of this study were to examine the molecular mechanisms by which casticin induces the growth inhibition and cell cycle arrest in human hepatocellular carcinoma (HCC) cells. The HCC cell lines Hep G2 and PLC/PRF/5 were cultured in vitro. The growth inhibitory effects of casticin were evaluated using clonogenic assays. The distribution of phases in the cell cycle was analyzed using flow cytometry (FCM) analysis with propidium iodide (PI) staining. Multiple molecular techniques, such as western blotting and gene transfection, were used to explore the molecular mechanisms of action. Our data demonstrated that casticin significantly inhibited cell viability and colony formation in HCC cells. Furthermore, it induced cell cycle arrest in the G2/M phase. Casticin inhibited phosphorylation of the FOXO3a protein and decreased the expression of FoxM1 and its downstream genes, such as cyclin-dependent kinase (CDK1), CDC25B and cyclin B and increased the expression of p27KIP1. 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Silencing of FOXO3a expression by small interfering RNA (siRNA) transfection clearly attenuated the inhibitory effects of casticin on FOXM1 expression and cell growth. Our findings provided clear evidence that casticin induces growth suppression and cell cycle arrest through inhibition of FOXO3a phosphorylation causing inactivation of FOXM1 in HCC cells.</abstract><cop>Greece</cop><pub>D.A. Spandidos</pub><pmid>23064420</pmid><doi>10.3892/or.2012.2076</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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subjects Apoptosis
Blotting, Western
Cancer therapies
Carcinoma, Hepatocellular - drug therapy
Carcinoma, Hepatocellular - metabolism
Carcinoma, Hepatocellular - pathology
casticin
Cell cycle
Cell Cycle Checkpoints - drug effects
Cell Proliferation - drug effects
Cell Survival - drug effects
Cyclin B - metabolism
Cyclin-Dependent Kinase Inhibitor p27 - metabolism
Cyclin-dependent kinases
Flavonoids - pharmacology
Forkhead Box Protein M1
Forkhead Box Protein O3
Forkhead Transcription Factors - antagonists & inhibitors
Forkhead Transcription Factors - genetics
Forkhead Transcription Factors - metabolism
FOXM1
FOXO3a
Gene Expression Regulation, Neoplastic
hepatocellular carcinoma
Humans
Investigations
Kinases
Liver cancer
Liver Neoplasms - drug therapy
Liver Neoplasms - metabolism
Liver Neoplasms - pathology
Medical prognosis
Phosphorylation
Proto-Oncogene Proteins c-akt - metabolism
RNA, Small Interfering - genetics
Transcription factors
Tumor Cells, Cultured
title Casticin induces growth suppression and cell cycle arrest through activation of FOXO3a in hepatocellular carcinoma
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