In vivo and in vitro suppression of hepatocellular carcinoma by EF24, a curcumin analog

The synthetic compound 3,5-bis(2-flurobenzylidene)piperidin-4-one (EF24) is a potent analog of curcumin that exhibits enhanced biological activity and bioavailability without increasing toxicity. EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many type...

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Veröffentlicht in:PloS one 2012-10, Vol.7 (10), p.e48075-e48075
Hauptverfasser: Liu, Haitao, Liang, Yingjian, Wang, Luoluo, Tian, Lantian, Song, Ruipeng, Han, Tianwen, Pan, Shangha, Liu, Lianxin
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container_start_page e48075
container_title PloS one
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creator Liu, Haitao
Liang, Yingjian
Wang, Luoluo
Tian, Lantian
Song, Ruipeng
Han, Tianwen
Pan, Shangha
Liu, Lianxin
description The synthetic compound 3,5-bis(2-flurobenzylidene)piperidin-4-one (EF24) is a potent analog of curcumin that exhibits enhanced biological activity and bioavailability without increasing toxicity. EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many types of cancer cells in vitro. The antiproliferative and antiangiogenic properties of EF24 provide theoretical support for its development and application to liver cancers. We investigated the in vitro and in vivo activities of EF24 on liver cancer to better understand its therapeutic effects and mechanisms. EF24 induced significant apoptosis and G2/M-phase cell cycle arrest in mouse liver cancer cell lines, Hepa1-6 and H22. The expression levels of G2/M cell cycle regulating factors, cyclin B1 and Cdc2, were significantly decreased, pp53, p53, and p21 were significantly increased in EF24-treated cells. In addition, EF24 treatment significantly reduced Bcl-2 concomitant with an increase in Bax, enhanced the release of cytochrome c from the mitochondria into the cytosol, resulting in an upregulation of cleaved-caspase-3, which promoted poly (ADP-ribose) polymerase cleavage. EF24-treated cells also displayed decreases in phosphorylated Akt, phosphorylated extracellular signal-regulated kinase and vascular endothelial growth factor. Our in vitro protein expression data were confirmed in vivo using a subcutaneous hepatocellular carcinoma (HCC) tumor model. This mouse HCC model confirmed that total body weight was unchanged following EF24 treatment, although tumor weight was significantly decreased. Using an orthotopic HCC model, EF24 significantly reduced the liver/body weight ratio and relative tumor areas compared to the control group. In situ detection of apoptotic cells and quantification of Ki-67, a biomarker of cell proliferation, all indicated significant tumor suppression with EF24 treatment. These results suggest that EF24 exhibits anti-tumor activity on liver cancer cells via mitochondria-dependent apoptosis and inducing cell cycle arrest coupled with antiangiogenesis. The demonstrated activities of EF24 support its further evaluation as a treatment for human liver cancers.
doi_str_mv 10.1371/journal.pone.0048075
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EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many types of cancer cells in vitro. The antiproliferative and antiangiogenic properties of EF24 provide theoretical support for its development and application to liver cancers. We investigated the in vitro and in vivo activities of EF24 on liver cancer to better understand its therapeutic effects and mechanisms. EF24 induced significant apoptosis and G2/M-phase cell cycle arrest in mouse liver cancer cell lines, Hepa1-6 and H22. The expression levels of G2/M cell cycle regulating factors, cyclin B1 and Cdc2, were significantly decreased, pp53, p53, and p21 were significantly increased in EF24-treated cells. In addition, EF24 treatment significantly reduced Bcl-2 concomitant with an increase in Bax, enhanced the release of cytochrome c from the mitochondria into the cytosol, resulting in an upregulation of cleaved-caspase-3, which promoted poly (ADP-ribose) polymerase cleavage. EF24-treated cells also displayed decreases in phosphorylated Akt, phosphorylated extracellular signal-regulated kinase and vascular endothelial growth factor. Our in vitro protein expression data were confirmed in vivo using a subcutaneous hepatocellular carcinoma (HCC) tumor model. This mouse HCC model confirmed that total body weight was unchanged following EF24 treatment, although tumor weight was significantly decreased. Using an orthotopic HCC model, EF24 significantly reduced the liver/body weight ratio and relative tumor areas compared to the control group. In situ detection of apoptotic cells and quantification of Ki-67, a biomarker of cell proliferation, all indicated significant tumor suppression with EF24 treatment. These results suggest that EF24 exhibits anti-tumor activity on liver cancer cells via mitochondria-dependent apoptosis and inducing cell cycle arrest coupled with antiangiogenesis. The demonstrated activities of EF24 support its further evaluation as a treatment for human liver cancers.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0048075</identifier><identifier>PMID: 23118928</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Adenosine diphosphate ; AKT protein ; Angiogenesis Inhibitors - pharmacology ; Animals ; Antiangiogenics ; Anticancer properties ; Antitumor activity ; Antitumor agents ; Apoptosis ; Apoptosis - drug effects ; Bax protein ; Bcl-2 protein ; Benzylidene Compounds - pharmacology ; Bioavailability ; Biocompatibility ; Biological activity ; Biology ; Biomarkers ; Body weight ; Cancer ; Carcinoma, Hepatocellular - blood supply ; Carcinoma, Hepatocellular - drug therapy ; Carcinoma, Hepatocellular - pathology ; Caspase ; Caspase-3 ; Cdc2 protein ; Cell cycle ; Cell Cycle Checkpoints - drug effects ; Cell growth ; Cell Line, Tumor ; Cell proliferation ; Cell Proliferation - drug effects ; Cell Survival - drug effects ; Curcumin ; Cyclin B1 ; Cytochrome ; Cytochrome c ; Cytosol ; Data processing ; Extracellular signal-regulated kinase ; Health aspects ; Hepatocellular carcinoma ; Hepatocytes ; Humans ; In vivo methods and tests ; Kinases ; Liver ; Liver cancer ; Liver Neoplasms, Experimental - blood supply ; Liver Neoplasms, Experimental - drug therapy ; Liver Neoplasms, Experimental - pathology ; Male ; MAP Kinase Signaling System - drug effects ; Medicine ; Mice ; Mice, Inbred C57BL ; Mitochondria ; Piperidones - pharmacology ; Ribose ; Rodents ; Toxicity ; Tumor Burden - drug effects ; Tumor cell lines ; Tumor proteins ; Tumor suppression ; Ubiquitin-Protein Ligases - drug effects ; Ubiquitin-Protein Ligases - physiology ; Vascular endothelial growth factor ; Weight reduction ; Xenograft Model Antitumor Assays</subject><ispartof>PloS one, 2012-10, Vol.7 (10), p.e48075-e48075</ispartof><rights>COPYRIGHT 2012 Public Library of Science</rights><rights>2012 Liu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2012 Liu et al 2012 Liu et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c758t-cc3a4ece92f0b4c8b065c09b02b4ca823382604f56e656a63bc15925ce5c85d43</citedby><cites>FETCH-LOGICAL-c758t-cc3a4ece92f0b4c8b065c09b02b4ca823382604f56e656a63bc15925ce5c85d43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3485291/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3485291/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2102,2928,23866,27924,27925,53791,53793,79472,79473</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23118928$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>El-Rifai, Wael</contributor><creatorcontrib>Liu, Haitao</creatorcontrib><creatorcontrib>Liang, Yingjian</creatorcontrib><creatorcontrib>Wang, Luoluo</creatorcontrib><creatorcontrib>Tian, Lantian</creatorcontrib><creatorcontrib>Song, Ruipeng</creatorcontrib><creatorcontrib>Han, Tianwen</creatorcontrib><creatorcontrib>Pan, Shangha</creatorcontrib><creatorcontrib>Liu, Lianxin</creatorcontrib><title>In vivo and in vitro suppression of hepatocellular carcinoma by EF24, a curcumin analog</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The synthetic compound 3,5-bis(2-flurobenzylidene)piperidin-4-one (EF24) is a potent analog of curcumin that exhibits enhanced biological activity and bioavailability without increasing toxicity. EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many types of cancer cells in vitro. The antiproliferative and antiangiogenic properties of EF24 provide theoretical support for its development and application to liver cancers. We investigated the in vitro and in vivo activities of EF24 on liver cancer to better understand its therapeutic effects and mechanisms. EF24 induced significant apoptosis and G2/M-phase cell cycle arrest in mouse liver cancer cell lines, Hepa1-6 and H22. The expression levels of G2/M cell cycle regulating factors, cyclin B1 and Cdc2, were significantly decreased, pp53, p53, and p21 were significantly increased in EF24-treated cells. In addition, EF24 treatment significantly reduced Bcl-2 concomitant with an increase in Bax, enhanced the release of cytochrome c from the mitochondria into the cytosol, resulting in an upregulation of cleaved-caspase-3, which promoted poly (ADP-ribose) polymerase cleavage. EF24-treated cells also displayed decreases in phosphorylated Akt, phosphorylated extracellular signal-regulated kinase and vascular endothelial growth factor. Our in vitro protein expression data were confirmed in vivo using a subcutaneous hepatocellular carcinoma (HCC) tumor model. This mouse HCC model confirmed that total body weight was unchanged following EF24 treatment, although tumor weight was significantly decreased. Using an orthotopic HCC model, EF24 significantly reduced the liver/body weight ratio and relative tumor areas compared to the control group. In situ detection of apoptotic cells and quantification of Ki-67, a biomarker of cell proliferation, all indicated significant tumor suppression with EF24 treatment. These results suggest that EF24 exhibits anti-tumor activity on liver cancer cells via mitochondria-dependent apoptosis and inducing cell cycle arrest coupled with antiangiogenesis. The demonstrated activities of EF24 support its further evaluation as a treatment for human liver cancers.</description><subject>Adenosine diphosphate</subject><subject>AKT protein</subject><subject>Angiogenesis Inhibitors - pharmacology</subject><subject>Animals</subject><subject>Antiangiogenics</subject><subject>Anticancer properties</subject><subject>Antitumor activity</subject><subject>Antitumor agents</subject><subject>Apoptosis</subject><subject>Apoptosis - drug effects</subject><subject>Bax protein</subject><subject>Bcl-2 protein</subject><subject>Benzylidene Compounds - pharmacology</subject><subject>Bioavailability</subject><subject>Biocompatibility</subject><subject>Biological activity</subject><subject>Biology</subject><subject>Biomarkers</subject><subject>Body weight</subject><subject>Cancer</subject><subject>Carcinoma, Hepatocellular - blood supply</subject><subject>Carcinoma, Hepatocellular - drug therapy</subject><subject>Carcinoma, Hepatocellular - pathology</subject><subject>Caspase</subject><subject>Caspase-3</subject><subject>Cdc2 protein</subject><subject>Cell cycle</subject><subject>Cell Cycle Checkpoints - drug effects</subject><subject>Cell growth</subject><subject>Cell Line, Tumor</subject><subject>Cell proliferation</subject><subject>Cell Proliferation - drug effects</subject><subject>Cell Survival - drug effects</subject><subject>Curcumin</subject><subject>Cyclin B1</subject><subject>Cytochrome</subject><subject>Cytochrome c</subject><subject>Cytosol</subject><subject>Data processing</subject><subject>Extracellular signal-regulated kinase</subject><subject>Health aspects</subject><subject>Hepatocellular carcinoma</subject><subject>Hepatocytes</subject><subject>Humans</subject><subject>In vivo methods and tests</subject><subject>Kinases</subject><subject>Liver</subject><subject>Liver cancer</subject><subject>Liver Neoplasms, Experimental - blood supply</subject><subject>Liver Neoplasms, Experimental - drug therapy</subject><subject>Liver Neoplasms, Experimental - pathology</subject><subject>Male</subject><subject>MAP Kinase Signaling System - drug effects</subject><subject>Medicine</subject><subject>Mice</subject><subject>Mice, Inbred C57BL</subject><subject>Mitochondria</subject><subject>Piperidones - 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Academic</collection><collection>ProQuest Engineering Collection</collection><collection>ProQuest Biological Science Collection</collection><collection>Agricultural Science Database</collection><collection>Health &amp; Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biological Science Database</collection><collection>Engineering Database</collection><collection>Nursing &amp; Allied Health Premium</collection><collection>Advanced Technologies &amp; Aerospace Database</collection><collection>ProQuest Advanced Technologies &amp; Aerospace Collection</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Haitao</au><au>Liang, Yingjian</au><au>Wang, Luoluo</au><au>Tian, Lantian</au><au>Song, Ruipeng</au><au>Han, Tianwen</au><au>Pan, Shangha</au><au>Liu, Lianxin</au><au>El-Rifai, Wael</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>In vivo and in vitro suppression of hepatocellular carcinoma by EF24, a curcumin analog</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2012-10-31</date><risdate>2012</risdate><volume>7</volume><issue>10</issue><spage>e48075</spage><epage>e48075</epage><pages>e48075-e48075</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>The synthetic compound 3,5-bis(2-flurobenzylidene)piperidin-4-one (EF24) is a potent analog of curcumin that exhibits enhanced biological activity and bioavailability without increasing toxicity. EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many types of cancer cells in vitro. The antiproliferative and antiangiogenic properties of EF24 provide theoretical support for its development and application to liver cancers. We investigated the in vitro and in vivo activities of EF24 on liver cancer to better understand its therapeutic effects and mechanisms. EF24 induced significant apoptosis and G2/M-phase cell cycle arrest in mouse liver cancer cell lines, Hepa1-6 and H22. The expression levels of G2/M cell cycle regulating factors, cyclin B1 and Cdc2, were significantly decreased, pp53, p53, and p21 were significantly increased in EF24-treated cells. In addition, EF24 treatment significantly reduced Bcl-2 concomitant with an increase in Bax, enhanced the release of cytochrome c from the mitochondria into the cytosol, resulting in an upregulation of cleaved-caspase-3, which promoted poly (ADP-ribose) polymerase cleavage. EF24-treated cells also displayed decreases in phosphorylated Akt, phosphorylated extracellular signal-regulated kinase and vascular endothelial growth factor. Our in vitro protein expression data were confirmed in vivo using a subcutaneous hepatocellular carcinoma (HCC) tumor model. This mouse HCC model confirmed that total body weight was unchanged following EF24 treatment, although tumor weight was significantly decreased. Using an orthotopic HCC model, EF24 significantly reduced the liver/body weight ratio and relative tumor areas compared to the control group. In situ detection of apoptotic cells and quantification of Ki-67, a biomarker of cell proliferation, all indicated significant tumor suppression with EF24 treatment. These results suggest that EF24 exhibits anti-tumor activity on liver cancer cells via mitochondria-dependent apoptosis and inducing cell cycle arrest coupled with antiangiogenesis. The demonstrated activities of EF24 support its further evaluation as a treatment for human liver cancers.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23118928</pmid><doi>10.1371/journal.pone.0048075</doi><tpages>e48075</tpages><oa>free_for_read</oa></addata></record>
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subjects Adenosine diphosphate
AKT protein
Angiogenesis Inhibitors - pharmacology
Animals
Antiangiogenics
Anticancer properties
Antitumor activity
Antitumor agents
Apoptosis
Apoptosis - drug effects
Bax protein
Bcl-2 protein
Benzylidene Compounds - pharmacology
Bioavailability
Biocompatibility
Biological activity
Biology
Biomarkers
Body weight
Cancer
Carcinoma, Hepatocellular - blood supply
Carcinoma, Hepatocellular - drug therapy
Carcinoma, Hepatocellular - pathology
Caspase
Caspase-3
Cdc2 protein
Cell cycle
Cell Cycle Checkpoints - drug effects
Cell growth
Cell Line, Tumor
Cell proliferation
Cell Proliferation - drug effects
Cell Survival - drug effects
Curcumin
Cyclin B1
Cytochrome
Cytochrome c
Cytosol
Data processing
Extracellular signal-regulated kinase
Health aspects
Hepatocellular carcinoma
Hepatocytes
Humans
In vivo methods and tests
Kinases
Liver
Liver cancer
Liver Neoplasms, Experimental - blood supply
Liver Neoplasms, Experimental - drug therapy
Liver Neoplasms, Experimental - pathology
Male
MAP Kinase Signaling System - drug effects
Medicine
Mice
Mice, Inbred C57BL
Mitochondria
Piperidones - pharmacology
Ribose
Rodents
Toxicity
Tumor Burden - drug effects
Tumor cell lines
Tumor proteins
Tumor suppression
Ubiquitin-Protein Ligases - drug effects
Ubiquitin-Protein Ligases - physiology
Vascular endothelial growth factor
Weight reduction
Xenograft Model Antitumor Assays
title In vivo and in vitro suppression of hepatocellular carcinoma by EF24, a curcumin analog
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