BMCC1, which is an interacting partner of BCL2, attenuates AKT activity, accompanied by apoptosis

B NIP2 and Cdc42GAP homology ( B CH) m otif- c ontaining molecule at the c arboxyl-terminal region 1 ( BMCC1 ) gene is highly expressed in patients with favorable neuroblastoma (NB). It encodes a 340-kDa protein with a conserved BCH scaffold domain that may regulate signaling networks and multiple c...

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Veröffentlicht in:Cell death & disease 2015-01, Vol.6 (1), p.e1607-e1607
Hauptverfasser: Tatsumi, Y, Takano, R, Islam, M S, Yokochi, T, Itami, M, Nakamura, Y, Nakagawara, A
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container_issue 1
container_start_page e1607
container_title Cell death & disease
container_volume 6
creator Tatsumi, Y
Takano, R
Islam, M S
Yokochi, T
Itami, M
Nakamura, Y
Nakagawara, A
description B NIP2 and Cdc42GAP homology ( B CH) m otif- c ontaining molecule at the c arboxyl-terminal region 1 ( BMCC1 ) gene is highly expressed in patients with favorable neuroblastoma (NB). It encodes a 340-kDa protein with a conserved BCH scaffold domain that may regulate signaling networks and multiple cellular functions, including apoptosis. In this study, we determined the mechanism by which BMCC1 promotes apoptosis in human NB and non-NB cells, as BMCC1 is normally expressed in various organs, particularly in neuronal and epithelial tissues. We demonstrated in this report that BMCC1 was induced by DNA damage, one of the triggers of intrinsic apoptosis. Accordingly, we investigated whether BMCC1 expression impacts intracellular signals in the regulation of apoptosis via its C-terminal region containing BCH scaffold domain. BMCC1 decreased phosphorylation of survival signals on AKT and its upstream kinase PDK1. BMCC1 upregulation was correlated with the activation of forkhead box-O3a (FOXO3a) (a downstream inducer of apoptosis, which is suppressed by AKT) and induction of BCL2 inhibitor BIM, suggesting that BMCC1 negatively regulates phosphorylation pathway of AKT, resulted in apoptosis. In addition, we found that BNIP2 homology region of BMCC1 interacts with BCL2. Intrinsic apoptosis induced by DNA damage was enhanced by BMCC1 overexpression, and was diminished by knockdown of BMCC1. Taken together, we conclude that BMCC1 promotes apoptosis at multiple steps in AKT-mediated survival signal pathway. These steps include physical interaction with BCL2 and attenuation of AKT-dependent inhibition of FOXO3a functions, such as transcriptional induction of BIM and phosphorylation of ataxia telangiectasia-mutated (ATM) after DNA damage. We propose that downregulation of BMCC1 expression, which is frequently observed in unfavorable NB and epithelial-derived cancers, may facilitate tumor development by abrogating DNA damage repair and apoptosis.
doi_str_mv 10.1038/cddis.2014.568
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It encodes a 340-kDa protein with a conserved BCH scaffold domain that may regulate signaling networks and multiple cellular functions, including apoptosis. In this study, we determined the mechanism by which BMCC1 promotes apoptosis in human NB and non-NB cells, as BMCC1 is normally expressed in various organs, particularly in neuronal and epithelial tissues. We demonstrated in this report that BMCC1 was induced by DNA damage, one of the triggers of intrinsic apoptosis. Accordingly, we investigated whether BMCC1 expression impacts intracellular signals in the regulation of apoptosis via its C-terminal region containing BCH scaffold domain. BMCC1 decreased phosphorylation of survival signals on AKT and its upstream kinase PDK1. BMCC1 upregulation was correlated with the activation of forkhead box-O3a (FOXO3a) (a downstream inducer of apoptosis, which is suppressed by AKT) and induction of BCL2 inhibitor BIM, suggesting that BMCC1 negatively regulates phosphorylation pathway of AKT, resulted in apoptosis. In addition, we found that BNIP2 homology region of BMCC1 interacts with BCL2. Intrinsic apoptosis induced by DNA damage was enhanced by BMCC1 overexpression, and was diminished by knockdown of BMCC1. Taken together, we conclude that BMCC1 promotes apoptosis at multiple steps in AKT-mediated survival signal pathway. These steps include physical interaction with BCL2 and attenuation of AKT-dependent inhibition of FOXO3a functions, such as transcriptional induction of BIM and phosphorylation of ataxia telangiectasia-mutated (ATM) after DNA damage. 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BMCC1 upregulation was correlated with the activation of forkhead box-O3a (FOXO3a) (a downstream inducer of apoptosis, which is suppressed by AKT) and induction of BCL2 inhibitor BIM, suggesting that BMCC1 negatively regulates phosphorylation pathway of AKT, resulted in apoptosis. In addition, we found that BNIP2 homology region of BMCC1 interacts with BCL2. Intrinsic apoptosis induced by DNA damage was enhanced by BMCC1 overexpression, and was diminished by knockdown of BMCC1. Taken together, we conclude that BMCC1 promotes apoptosis at multiple steps in AKT-mediated survival signal pathway. These steps include physical interaction with BCL2 and attenuation of AKT-dependent inhibition of FOXO3a functions, such as transcriptional induction of BIM and phosphorylation of ataxia telangiectasia-mutated (ATM) after DNA damage. We propose that downregulation of BMCC1 expression, which is frequently observed in unfavorable NB and epithelial-derived cancers, may facilitate tumor development by abrogating DNA damage repair and apoptosis.</description><subject>13/2</subject><subject>14/105</subject><subject>14/19</subject><subject>631/337</subject><subject>631/80/82/23</subject><subject>631/80/86</subject><subject>692/699/67/2332</subject><subject>82/51</subject><subject>82/80</subject><subject>96</subject><subject>Antibodies</subject><subject>Apoptosis</subject><subject>Apoptosis Regulatory Proteins - metabolism</subject><subject>Bcl-2-Like Protein 11</subject><subject>Biochemistry</subject><subject>Biomedical and Life Sciences</subject><subject>Cell Biology</subject><subject>Cell Culture</subject><subject>Cell Line, Tumor</subject><subject>Cisplatin - pharmacology</subject><subject>DNA Damage</subject><subject>Down-Regulation - drug effects</subject><subject>Epithelium - drug effects</subject><subject>Epithelium - metabolism</subject><subject>Forkhead Box Protein O3</subject><subject>Forkhead Transcription Factors - metabolism</subject><subject>Gene Knockdown Techniques</subject><subject>Humans</subject><subject>Immunology</subject><subject>Life Sciences</subject><subject>Membrane Proteins - metabolism</subject><subject>Neoplasm Proteins - metabolism</subject><subject>Neuroblastoma - enzymology</subject><subject>Neuroblastoma - pathology</subject><subject>Original</subject><subject>original-article</subject><subject>Phosphorylation - drug effects</subject><subject>Phosphothreonine - metabolism</subject><subject>Protein Binding - drug effects</subject><subject>Proto-Oncogene Proteins - metabolism</subject><subject>Proto-Oncogene Proteins c-akt - metabolism</subject><subject>Proto-Oncogene Proteins c-bcl-2 - metabolism</subject><subject>RNA, Small Interfering - metabolism</subject><subject>Skin Neoplasms - metabolism</subject><subject>Skin Neoplasms - pathology</subject><issn>2041-4889</issn><issn>2041-4889</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqFkc1rHCEYh4fS0oQ01x6L0EsP2Y3fo5dCMvSLbOhl7-Kos2vY1ak6Cfvf1-2mYVsC8aDC-_i86q9p3iM4R5CIS2Otz3MMEZ0zLl41pxhSNKNCyNdH-5PmPOc7WAchEDP-tjmpM0JE4NNGX992HboAD2tv1sBnoAPwobikTfFhBUadSnAJxAFcdwt8AXQpLky6uAyubpZgj937sqsFY-J21ME7C_od0GMcS8w-v2veDHqT3fnjetYsv35Zdt9ni5_ffnRXi5lhrC2z1uGWot7RXnJjByMMYQYRIrgVSDCL-cAQ0j1vNWKUUmudREzagWhkuCVnzeeDdpz6rbPGhZL0Ro3Jb3Xaqai9-rcS_Fqt4r2inMuW8yr49ChI8dfkclFbn43bbHRwccoKtRLKFjIqX0Y5w0RSzvbWj_-hd3FKoX5EFQomsaypVGp-oEyKOSc3PN0bQbWPWv2JWu2jVjXqeuDD8Wuf8L_BVuDyAORaCiuXjvo-r_wNFFuzzQ</recordid><startdate>20150101</startdate><enddate>20150101</enddate><creator>Tatsumi, Y</creator><creator>Takano, R</creator><creator>Islam, M S</creator><creator>Yokochi, T</creator><creator>Itami, M</creator><creator>Nakamura, Y</creator><creator>Nakagawara, A</creator><general>Nature Publishing Group UK</general><general>Springer Nature B.V</general><general>Nature Publishing Group</general><scope>C6C</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88I</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M2P</scope><scope>M7P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope><scope>7TO</scope><scope>H94</scope><scope>5PM</scope></search><sort><creationdate>20150101</creationdate><title>BMCC1, which is an interacting partner of BCL2, attenuates AKT activity, accompanied by apoptosis</title><author>Tatsumi, Y ; 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disease</jtitle><stitle>Cell Death Dis</stitle><addtitle>Cell Death Dis</addtitle><date>2015-01-01</date><risdate>2015</risdate><volume>6</volume><issue>1</issue><spage>e1607</spage><epage>e1607</epage><pages>e1607-e1607</pages><issn>2041-4889</issn><eissn>2041-4889</eissn><abstract>B NIP2 and Cdc42GAP homology ( B CH) m otif- c ontaining molecule at the c arboxyl-terminal region 1 ( BMCC1 ) gene is highly expressed in patients with favorable neuroblastoma (NB). It encodes a 340-kDa protein with a conserved BCH scaffold domain that may regulate signaling networks and multiple cellular functions, including apoptosis. In this study, we determined the mechanism by which BMCC1 promotes apoptosis in human NB and non-NB cells, as BMCC1 is normally expressed in various organs, particularly in neuronal and epithelial tissues. We demonstrated in this report that BMCC1 was induced by DNA damage, one of the triggers of intrinsic apoptosis. Accordingly, we investigated whether BMCC1 expression impacts intracellular signals in the regulation of apoptosis via its C-terminal region containing BCH scaffold domain. BMCC1 decreased phosphorylation of survival signals on AKT and its upstream kinase PDK1. BMCC1 upregulation was correlated with the activation of forkhead box-O3a (FOXO3a) (a downstream inducer of apoptosis, which is suppressed by AKT) and induction of BCL2 inhibitor BIM, suggesting that BMCC1 negatively regulates phosphorylation pathway of AKT, resulted in apoptosis. In addition, we found that BNIP2 homology region of BMCC1 interacts with BCL2. Intrinsic apoptosis induced by DNA damage was enhanced by BMCC1 overexpression, and was diminished by knockdown of BMCC1. Taken together, we conclude that BMCC1 promotes apoptosis at multiple steps in AKT-mediated survival signal pathway. These steps include physical interaction with BCL2 and attenuation of AKT-dependent inhibition of FOXO3a functions, such as transcriptional induction of BIM and phosphorylation of ataxia telangiectasia-mutated (ATM) after DNA damage. We propose that downregulation of BMCC1 expression, which is frequently observed in unfavorable NB and epithelial-derived cancers, may facilitate tumor development by abrogating DNA damage repair and apoptosis.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>25611382</pmid><doi>10.1038/cddis.2014.568</doi><oa>free_for_read</oa></addata></record>
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subjects 13/2
14/105
14/19
631/337
631/80/82/23
631/80/86
692/699/67/2332
82/51
82/80
96
Antibodies
Apoptosis
Apoptosis Regulatory Proteins - metabolism
Bcl-2-Like Protein 11
Biochemistry
Biomedical and Life Sciences
Cell Biology
Cell Culture
Cell Line, Tumor
Cisplatin - pharmacology
DNA Damage
Down-Regulation - drug effects
Epithelium - drug effects
Epithelium - metabolism
Forkhead Box Protein O3
Forkhead Transcription Factors - metabolism
Gene Knockdown Techniques
Humans
Immunology
Life Sciences
Membrane Proteins - metabolism
Neoplasm Proteins - metabolism
Neuroblastoma - enzymology
Neuroblastoma - pathology
Original
original-article
Phosphorylation - drug effects
Phosphothreonine - metabolism
Protein Binding - drug effects
Proto-Oncogene Proteins - metabolism
Proto-Oncogene Proteins c-akt - metabolism
Proto-Oncogene Proteins c-bcl-2 - metabolism
RNA, Small Interfering - metabolism
Skin Neoplasms - metabolism
Skin Neoplasms - pathology
title BMCC1, which is an interacting partner of BCL2, attenuates AKT activity, accompanied by apoptosis
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