Wnt status-dependent oncogenic role of BCL9 and BCL9L in hepatocellular carcinoma

Background Activation of Wnt/β-catenin pathway is a frequent event in hepatocellular carcinoma and is associated with enhanced cell survival and proliferation. Therefore, targeting this signaling pathway is discussed as an attractive therapeutic approach for HCC treatment. BCL9 and BCL9L, two homolo...

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Veröffentlicht in:Hepatology international 2020-05, Vol.14 (3), p.373-384
Hauptverfasser: Huge, Nicole, Sandbothe, Maria, Schröder, Anna K., Stalke, Amelie, Eilers, Marlies, Schäffer, Vera, Schlegelberger, Brigitte, Illig, Thomas, Vajen, Beate, Skawran, Britta
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container_end_page 384
container_issue 3
container_start_page 373
container_title Hepatology international
container_volume 14
creator Huge, Nicole
Sandbothe, Maria
Schröder, Anna K.
Stalke, Amelie
Eilers, Marlies
Schäffer, Vera
Schlegelberger, Brigitte
Illig, Thomas
Vajen, Beate
Skawran, Britta
description Background Activation of Wnt/β-catenin pathway is a frequent event in hepatocellular carcinoma and is associated with enhanced cell survival and proliferation. Therefore, targeting this signaling pathway is discussed as an attractive therapeutic approach for HCC treatment. BCL9 and BCL9L, two homologous coactivators of the β-catenin transcription factor complex, have not yet been comprehensively characterized in HCC. We aimed to elucidate the roles of BCL9 and BCL9L, especially regarding Wnt/β-catenin signaling and their prognostic value in HCC. Methods Expression of BCL9/BCL9L was determined in HCC cell lines (HLE, HLF, Huh7, HepG2, Hep3B, and Huh6) and normal liver cell lines (THLE-2 and THLE-3). To analyze proliferation and apoptosis, BCL9 and/or BCL9L were knocked down in Wnt-inactive HLE and Wnt-active HepG2 and Huh6 cells using siRNA. Subsequently, Wnt reporter assays were performed in HepG2 and Huh6 cells. BCL9 and BCL9L expression, clinicopathological and survival data of public HCC datasets were analyzed, taking the Wnt signaling status into account. Results Knockdown of BCL9L, but not of BCL9, reduced Wnt signaling activity. Knockdown of BCL9 and/or BCL9L reduced cell viability and increased apoptosis of Wnt-inactive HCC cells, but had no effect in Wnt-active cells. Expression of BCL9 and BCL9L was upregulated in human HCC and increased with progressing dedifferentiation. For BCL9L , higher expression was observed in tumors of larger size. Overexpression of BCL9 and BCL9L correlated with poor overall survival, especially in HCC without activated Wnt signaling. Conclusion Oncogenic BCL9 proteins represent promising targets for cancer therapy and inhibiting them may be particularly beneficial in Wnt-inactive HCCs. Graphic abstract
doi_str_mv 10.1007/s12072-019-09977-w
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Therefore, targeting this signaling pathway is discussed as an attractive therapeutic approach for HCC treatment. BCL9 and BCL9L, two homologous coactivators of the β-catenin transcription factor complex, have not yet been comprehensively characterized in HCC. We aimed to elucidate the roles of BCL9 and BCL9L, especially regarding Wnt/β-catenin signaling and their prognostic value in HCC. Methods Expression of BCL9/BCL9L was determined in HCC cell lines (HLE, HLF, Huh7, HepG2, Hep3B, and Huh6) and normal liver cell lines (THLE-2 and THLE-3). To analyze proliferation and apoptosis, BCL9 and/or BCL9L were knocked down in Wnt-inactive HLE and Wnt-active HepG2 and Huh6 cells using siRNA. Subsequently, Wnt reporter assays were performed in HepG2 and Huh6 cells. BCL9 and BCL9L expression, clinicopathological and survival data of public HCC datasets were analyzed, taking the Wnt signaling status into account. Results Knockdown of BCL9L, but not of BCL9, reduced Wnt signaling activity. Knockdown of BCL9 and/or BCL9L reduced cell viability and increased apoptosis of Wnt-inactive HCC cells, but had no effect in Wnt-active cells. Expression of BCL9 and BCL9L was upregulated in human HCC and increased with progressing dedifferentiation. For BCL9L , higher expression was observed in tumors of larger size. Overexpression of BCL9 and BCL9L correlated with poor overall survival, especially in HCC without activated Wnt signaling. Conclusion Oncogenic BCL9 proteins represent promising targets for cancer therapy and inhibiting them may be particularly beneficial in Wnt-inactive HCCs. Graphic abstract</description><identifier>ISSN: 1936-0533</identifier><identifier>EISSN: 1936-0541</identifier><identifier>DOI: 10.1007/s12072-019-09977-w</identifier><identifier>PMID: 31440992</identifier><language>eng</language><publisher>New Delhi: Springer India</publisher><subject>Apoptosis ; beta Catenin - metabolism ; Biotechnology ; Cancer ; Carcinoma, Hepatocellular - genetics ; Carcinoma, Hepatocellular - mortality ; Carcinoma, Hepatocellular - pathology ; Cell Line, Tumor ; Cell Proliferation ; Cell Survival ; Cell viability ; Colorectal Surgery ; DNA-Binding Proteins - genetics ; Gene Expression Regulation, Neoplastic ; Hepatocellular carcinoma ; Hepatocytes ; Hepatology ; Homology ; Humans ; Liver cancer ; Liver Neoplasms - genetics ; Liver Neoplasms - mortality ; Liver Neoplasms - pathology ; Medicine ; Medicine &amp; Public Health ; Neoplasm Proteins ; Original ; Original Article ; Pharmacogenetics ; Prognosis ; Signal transduction ; Signaling ; siRNA ; Surgery ; Survival ; Survival Analysis ; Transcription Factors - genetics ; Tumors ; Wnt protein ; Wnt Signaling Pathway ; β-Catenin</subject><ispartof>Hepatology international, 2020-05, Vol.14 (3), p.373-384</ispartof><rights>The Author(s) 2019</rights><rights>The Author(s) 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c474t-51cfdab3bf6023dcb7dbab532f339e0b49b6acf001af4aa9c321cedef5fe89fb3</citedby><cites>FETCH-LOGICAL-c474t-51cfdab3bf6023dcb7dbab532f339e0b49b6acf001af4aa9c321cedef5fe89fb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12072-019-09977-w$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12072-019-09977-w$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>230,314,776,780,881,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31440992$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Huge, Nicole</creatorcontrib><creatorcontrib>Sandbothe, Maria</creatorcontrib><creatorcontrib>Schröder, Anna K.</creatorcontrib><creatorcontrib>Stalke, Amelie</creatorcontrib><creatorcontrib>Eilers, Marlies</creatorcontrib><creatorcontrib>Schäffer, Vera</creatorcontrib><creatorcontrib>Schlegelberger, Brigitte</creatorcontrib><creatorcontrib>Illig, Thomas</creatorcontrib><creatorcontrib>Vajen, Beate</creatorcontrib><creatorcontrib>Skawran, Britta</creatorcontrib><title>Wnt status-dependent oncogenic role of BCL9 and BCL9L in hepatocellular carcinoma</title><title>Hepatology international</title><addtitle>Hepatol Int</addtitle><addtitle>Hepatol Int</addtitle><description>Background Activation of Wnt/β-catenin pathway is a frequent event in hepatocellular carcinoma and is associated with enhanced cell survival and proliferation. Therefore, targeting this signaling pathway is discussed as an attractive therapeutic approach for HCC treatment. BCL9 and BCL9L, two homologous coactivators of the β-catenin transcription factor complex, have not yet been comprehensively characterized in HCC. We aimed to elucidate the roles of BCL9 and BCL9L, especially regarding Wnt/β-catenin signaling and their prognostic value in HCC. Methods Expression of BCL9/BCL9L was determined in HCC cell lines (HLE, HLF, Huh7, HepG2, Hep3B, and Huh6) and normal liver cell lines (THLE-2 and THLE-3). To analyze proliferation and apoptosis, BCL9 and/or BCL9L were knocked down in Wnt-inactive HLE and Wnt-active HepG2 and Huh6 cells using siRNA. Subsequently, Wnt reporter assays were performed in HepG2 and Huh6 cells. BCL9 and BCL9L expression, clinicopathological and survival data of public HCC datasets were analyzed, taking the Wnt signaling status into account. Results Knockdown of BCL9L, but not of BCL9, reduced Wnt signaling activity. Knockdown of BCL9 and/or BCL9L reduced cell viability and increased apoptosis of Wnt-inactive HCC cells, but had no effect in Wnt-active cells. Expression of BCL9 and BCL9L was upregulated in human HCC and increased with progressing dedifferentiation. For BCL9L , higher expression was observed in tumors of larger size. Overexpression of BCL9 and BCL9L correlated with poor overall survival, especially in HCC without activated Wnt signaling. Conclusion Oncogenic BCL9 proteins represent promising targets for cancer therapy and inhibiting them may be particularly beneficial in Wnt-inactive HCCs. 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Public Health</topic><topic>Neoplasm Proteins</topic><topic>Original</topic><topic>Original Article</topic><topic>Pharmacogenetics</topic><topic>Prognosis</topic><topic>Signal transduction</topic><topic>Signaling</topic><topic>siRNA</topic><topic>Surgery</topic><topic>Survival</topic><topic>Survival Analysis</topic><topic>Transcription Factors - genetics</topic><topic>Tumors</topic><topic>Wnt protein</topic><topic>Wnt Signaling Pathway</topic><topic>β-Catenin</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huge, Nicole</creatorcontrib><creatorcontrib>Sandbothe, Maria</creatorcontrib><creatorcontrib>Schröder, Anna K.</creatorcontrib><creatorcontrib>Stalke, Amelie</creatorcontrib><creatorcontrib>Eilers, Marlies</creatorcontrib><creatorcontrib>Schäffer, Vera</creatorcontrib><creatorcontrib>Schlegelberger, Brigitte</creatorcontrib><creatorcontrib>Illig, Thomas</creatorcontrib><creatorcontrib>Vajen, Beate</creatorcontrib><creatorcontrib>Skawran, Britta</creatorcontrib><collection>Springer Nature OA Free Journals</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>Nursing &amp; Allied Health Premium</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Hepatology international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huge, Nicole</au><au>Sandbothe, Maria</au><au>Schröder, Anna K.</au><au>Stalke, Amelie</au><au>Eilers, Marlies</au><au>Schäffer, Vera</au><au>Schlegelberger, Brigitte</au><au>Illig, Thomas</au><au>Vajen, Beate</au><au>Skawran, Britta</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Wnt status-dependent oncogenic role of BCL9 and BCL9L in hepatocellular carcinoma</atitle><jtitle>Hepatology international</jtitle><stitle>Hepatol Int</stitle><addtitle>Hepatol Int</addtitle><date>2020-05-01</date><risdate>2020</risdate><volume>14</volume><issue>3</issue><spage>373</spage><epage>384</epage><pages>373-384</pages><issn>1936-0533</issn><eissn>1936-0541</eissn><abstract>Background Activation of Wnt/β-catenin pathway is a frequent event in hepatocellular carcinoma and is associated with enhanced cell survival and proliferation. Therefore, targeting this signaling pathway is discussed as an attractive therapeutic approach for HCC treatment. BCL9 and BCL9L, two homologous coactivators of the β-catenin transcription factor complex, have not yet been comprehensively characterized in HCC. We aimed to elucidate the roles of BCL9 and BCL9L, especially regarding Wnt/β-catenin signaling and their prognostic value in HCC. Methods Expression of BCL9/BCL9L was determined in HCC cell lines (HLE, HLF, Huh7, HepG2, Hep3B, and Huh6) and normal liver cell lines (THLE-2 and THLE-3). To analyze proliferation and apoptosis, BCL9 and/or BCL9L were knocked down in Wnt-inactive HLE and Wnt-active HepG2 and Huh6 cells using siRNA. Subsequently, Wnt reporter assays were performed in HepG2 and Huh6 cells. BCL9 and BCL9L expression, clinicopathological and survival data of public HCC datasets were analyzed, taking the Wnt signaling status into account. Results Knockdown of BCL9L, but not of BCL9, reduced Wnt signaling activity. Knockdown of BCL9 and/or BCL9L reduced cell viability and increased apoptosis of Wnt-inactive HCC cells, but had no effect in Wnt-active cells. Expression of BCL9 and BCL9L was upregulated in human HCC and increased with progressing dedifferentiation. For BCL9L , higher expression was observed in tumors of larger size. Overexpression of BCL9 and BCL9L correlated with poor overall survival, especially in HCC without activated Wnt signaling. Conclusion Oncogenic BCL9 proteins represent promising targets for cancer therapy and inhibiting them may be particularly beneficial in Wnt-inactive HCCs. Graphic abstract</abstract><cop>New Delhi</cop><pub>Springer India</pub><pmid>31440992</pmid><doi>10.1007/s12072-019-09977-w</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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subjects Apoptosis
beta Catenin - metabolism
Biotechnology
Cancer
Carcinoma, Hepatocellular - genetics
Carcinoma, Hepatocellular - mortality
Carcinoma, Hepatocellular - pathology
Cell Line, Tumor
Cell Proliferation
Cell Survival
Cell viability
Colorectal Surgery
DNA-Binding Proteins - genetics
Gene Expression Regulation, Neoplastic
Hepatocellular carcinoma
Hepatocytes
Hepatology
Homology
Humans
Liver cancer
Liver Neoplasms - genetics
Liver Neoplasms - mortality
Liver Neoplasms - pathology
Medicine
Medicine & Public Health
Neoplasm Proteins
Original
Original Article
Pharmacogenetics
Prognosis
Signal transduction
Signaling
siRNA
Surgery
Survival
Survival Analysis
Transcription Factors - genetics
Tumors
Wnt protein
Wnt Signaling Pathway
β-Catenin
title Wnt status-dependent oncogenic role of BCL9 and BCL9L in hepatocellular carcinoma
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