Identification of novel molecular targets regulated by tumor suppressive miR-375 induced by histone acetylation in esophageal squamous cell carcinoma

The aim of this study was to determine whether histone acetylation regulates tumor suppressive microRNAs (miRNAs) in esophageal squamous cell carcinoma (ESCC) and to identify genes which are regulated by these miRNAs. We identified a miRNA that was highly upregulated in an ESCC cell line by cyclic h...

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Veröffentlicht in:International journal of oncology 2012-09, Vol.41 (3), p.985-994
Hauptverfasser: ISOZAKI, YUKA, HOSHINO, ISAMU, NOHATA, NIJIRO, KINOSHITA, TAKASHI, AKUTSU, YASUNORI, HANARI, NAOYUKI, MORI, MIKITO, YONEYAMA, YASUO, AKANUMA, NAOKI, TAKESHITA, NOBUYOSHI, MARUYAMA, TETSURO, SEKI, NAOHIKO, NISHINO, NORIKAZU, YOSHIDA, MINORU, MATSUBARA, HISAHIRO
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container_issue 3
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container_title International journal of oncology
container_volume 41
creator ISOZAKI, YUKA
HOSHINO, ISAMU
NOHATA, NIJIRO
KINOSHITA, TAKASHI
AKUTSU, YASUNORI
HANARI, NAOYUKI
MORI, MIKITO
YONEYAMA, YASUO
AKANUMA, NAOKI
TAKESHITA, NOBUYOSHI
MARUYAMA, TETSURO
SEKI, NAOHIKO
NISHINO, NORIKAZU
YOSHIDA, MINORU
MATSUBARA, HISAHIRO
description The aim of this study was to determine whether histone acetylation regulates tumor suppressive microRNAs (miRNAs) in esophageal squamous cell carcinoma (ESCC) and to identify genes which are regulated by these miRNAs. We identified a miRNA that was highly upregulated in an ESCC cell line by cyclic hydroxamic acid-containing peptide 31 (CHAP31), one of the histone deacetylase inhibitors (HDACIs), using a miRNA array analysis. miR-375 was strongly upregulated by CHAP31 treatment in an ESCC cell line. The expression levels of the most upregulated miRNA, miR-375 were analyzed by quantitative real-time PCR in human ESCC specimens. The tumor suppressive function of miR-375 was revealed by restoration of miR-375 in ESCC cell lines. We performed a microarray analysis to identify target genes of miR-375. The mRNA and protein expression levels of these genes were verified in ESCC clinical specimens. LDHB and AEG-1/MTDH were detected as miR-375-targeted genes. The restoration of miR-375 suppressed the expression of LDHB and AEG-1/MTDH. The ESCC clinical specimens exhibited a high level of LDHB expression at both the mRNA and protein levels. A loss-of-function assay using a siRNA analysis was performed to examine the oncogenic function of the gene. Knockdown of LDHB by RNAi showed a tumor suppressive function in the ESCC cells. The correlation between gene expression and clinicopathological features was investigated by immunohistochemistry for 94 cases of ESCC. The positive staining of LDHB correlated significantly with lymph node metastasis and tumor stage. It also had a tendency to be associated with a poor prognosis. Our results indicate that HDACIs upregulate miRNAs, at least some of which act as tumor suppressors. LDHB, which is regulated by the tumor suppressive miR-375, may therefore act as an oncogene in ESCC.
doi_str_mv 10.3892/ijo.2012.1537
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We identified a miRNA that was highly upregulated in an ESCC cell line by cyclic hydroxamic acid-containing peptide 31 (CHAP31), one of the histone deacetylase inhibitors (HDACIs), using a miRNA array analysis. miR-375 was strongly upregulated by CHAP31 treatment in an ESCC cell line. The expression levels of the most upregulated miRNA, miR-375 were analyzed by quantitative real-time PCR in human ESCC specimens. The tumor suppressive function of miR-375 was revealed by restoration of miR-375 in ESCC cell lines. We performed a microarray analysis to identify target genes of miR-375. The mRNA and protein expression levels of these genes were verified in ESCC clinical specimens. LDHB and AEG-1/MTDH were detected as miR-375-targeted genes. The restoration of miR-375 suppressed the expression of LDHB and AEG-1/MTDH. The ESCC clinical specimens exhibited a high level of LDHB expression at both the mRNA and protein levels. A loss-of-function assay using a siRNA analysis was performed to examine the oncogenic function of the gene. Knockdown of LDHB by RNAi showed a tumor suppressive function in the ESCC cells. The correlation between gene expression and clinicopathological features was investigated by immunohistochemistry for 94 cases of ESCC. The positive staining of LDHB correlated significantly with lymph node metastasis and tumor stage. It also had a tendency to be associated with a poor prognosis. Our results indicate that HDACIs upregulate miRNAs, at least some of which act as tumor suppressors. LDHB, which is regulated by the tumor suppressive miR-375, may therefore act as an oncogene in ESCC.</description><identifier>ISSN: 1019-6439</identifier><identifier>EISSN: 1791-2423</identifier><identifier>DOI: 10.3892/ijo.2012.1537</identifier><identifier>PMID: 22752059</identifier><language>eng</language><publisher>Athens: D.A. 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We identified a miRNA that was highly upregulated in an ESCC cell line by cyclic hydroxamic acid-containing peptide 31 (CHAP31), one of the histone deacetylase inhibitors (HDACIs), using a miRNA array analysis. miR-375 was strongly upregulated by CHAP31 treatment in an ESCC cell line. The expression levels of the most upregulated miRNA, miR-375 were analyzed by quantitative real-time PCR in human ESCC specimens. The tumor suppressive function of miR-375 was revealed by restoration of miR-375 in ESCC cell lines. We performed a microarray analysis to identify target genes of miR-375. The mRNA and protein expression levels of these genes were verified in ESCC clinical specimens. LDHB and AEG-1/MTDH were detected as miR-375-targeted genes. The restoration of miR-375 suppressed the expression of LDHB and AEG-1/MTDH. The ESCC clinical specimens exhibited a high level of LDHB expression at both the mRNA and protein levels. A loss-of-function assay using a siRNA analysis was performed to examine the oncogenic function of the gene. Knockdown of LDHB by RNAi showed a tumor suppressive function in the ESCC cells. The correlation between gene expression and clinicopathological features was investigated by immunohistochemistry for 94 cases of ESCC. The positive staining of LDHB correlated significantly with lymph node metastasis and tumor stage. It also had a tendency to be associated with a poor prognosis. Our results indicate that HDACIs upregulate miRNAs, at least some of which act as tumor suppressors. LDHB, which is regulated by the tumor suppressive miR-375, may therefore act as an oncogene in ESCC.</description><subject>Acetylation</subject><subject>AEG-1/MTDH</subject><subject>Aged</subject><subject>Apoptosis</subject><subject>Biological and medical sciences</subject><subject>Biomarkers, Tumor - genetics</subject><subject>Cancer therapies</subject><subject>Carcinoma, Squamous Cell - genetics</subject><subject>Carcinoma, Squamous Cell - metabolism</subject><subject>Cell Adhesion Molecules - metabolism</subject><subject>Cell cycle</subject><subject>Cell growth</subject><subject>Cell Movement</subject><subject>Cell Proliferation</subject><subject>CHAP31</subject><subject>Chemotherapy</subject><subject>DNA methylation</subject><subject>Epigenetics</subject><subject>Esophageal cancer</subject><subject>Esophageal Neoplasms - genetics</subject><subject>Esophageal Neoplasms - metabolism</subject><subject>esophageal squamous cell carcinoma</subject><subject>Esophagus</subject><subject>Female</subject><subject>Gastroenterology. Liver. Pancreas. Abdomen</subject><subject>Gene expression</subject><subject>Gene Expression Regulation, Neoplastic</subject><subject>HDAC inhibitor</subject><subject>histone acetylation</subject><subject>Histone Deacetylase Inhibitors - metabolism</subject><subject>Histones - metabolism</subject><subject>Humans</subject><subject>Isoenzymes - metabolism</subject><subject>L-Lactate Dehydrogenase - metabolism</subject><subject>LDHB</subject><subject>Male</subject><subject>Medical prognosis</subject><subject>Medical sciences</subject><subject>Metastasis</subject><subject>microRNA</subject><subject>MicroRNAs - genetics</subject><subject>MicroRNAs - metabolism</subject><subject>Middle Aged</subject><subject>miR-375</subject><subject>Multivariate analysis</subject><subject>Oligonucleotide Array Sequence Analysis</subject><subject>Peptides, Cyclic - metabolism</subject><subject>Radiation therapy</subject><subject>RNA Interference</subject><subject>RNA, Small Interfering</subject><subject>Squamous cell carcinoma</subject><subject>Studies</subject><subject>Tumors</subject><issn>1019-6439</issn><issn>1791-2423</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNpF0ctq3DAUBmATWnJrl90WQSlZaaqrZS1LaNJAoFDatdFIRxMNtuRIcmAepO9bD542K0nwcX5x_qb5QMmGd5p9Cfu0YYSyDZVcnTWXVGmKmWD8zXInVONWcH3RXJWyJ4RJSeh5c8GYkoxIfdn8eXAQa_DBmhpSRMmjmF5gQGMawM6DyaiavINaUIbd8q7g0PaA6jymjMo8TRlKCS-AxvATcyVRiG62K3oKpaYIyFioh2ENCBFBSdOT2YEZUHmezZjmgiwMA7Im2xDTaN41b70ZCrw_ndfN77tvv26_48cf9w-3Xx-xFV1XMZBOtC1piVXce814J8ETu_WcCqk4VcpxQgAc3QojmRMcXNeBF7azLdOEXzef1rlTTs8zlNrv05zjEtlTzRnnWlC1KLwqm1MpGXw_5TCafOgp6Y8l9EsJ_bGE_ljC4j-eps7bEdx__W_rC_h8AqZYM_hsog3l1bVUtZQev3ezujKZ6IJLr2ZJxIJiwjHRneR_AfTLnvs</recordid><startdate>20120901</startdate><enddate>20120901</enddate><creator>ISOZAKI, YUKA</creator><creator>HOSHINO, ISAMU</creator><creator>NOHATA, NIJIRO</creator><creator>KINOSHITA, TAKASHI</creator><creator>AKUTSU, YASUNORI</creator><creator>HANARI, NAOYUKI</creator><creator>MORI, MIKITO</creator><creator>YONEYAMA, YASUO</creator><creator>AKANUMA, NAOKI</creator><creator>TAKESHITA, NOBUYOSHI</creator><creator>MARUYAMA, TETSURO</creator><creator>SEKI, NAOHIKO</creator><creator>NISHINO, NORIKAZU</creator><creator>YOSHIDA, MINORU</creator><creator>MATSUBARA, HISAHIRO</creator><general>D.A. 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A loss-of-function assay using a siRNA analysis was performed to examine the oncogenic function of the gene. Knockdown of LDHB by RNAi showed a tumor suppressive function in the ESCC cells. The correlation between gene expression and clinicopathological features was investigated by immunohistochemistry for 94 cases of ESCC. The positive staining of LDHB correlated significantly with lymph node metastasis and tumor stage. It also had a tendency to be associated with a poor prognosis. Our results indicate that HDACIs upregulate miRNAs, at least some of which act as tumor suppressors. LDHB, which is regulated by the tumor suppressive miR-375, may therefore act as an oncogene in ESCC.</abstract><cop>Athens</cop><pub>D.A. Spandidos</pub><pmid>22752059</pmid><doi>10.3892/ijo.2012.1537</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record>
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source Spandidos Publications Journals; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Acetylation
AEG-1/MTDH
Aged
Apoptosis
Biological and medical sciences
Biomarkers, Tumor - genetics
Cancer therapies
Carcinoma, Squamous Cell - genetics
Carcinoma, Squamous Cell - metabolism
Cell Adhesion Molecules - metabolism
Cell cycle
Cell growth
Cell Movement
Cell Proliferation
CHAP31
Chemotherapy
DNA methylation
Epigenetics
Esophageal cancer
Esophageal Neoplasms - genetics
Esophageal Neoplasms - metabolism
esophageal squamous cell carcinoma
Esophagus
Female
Gastroenterology. Liver. Pancreas. Abdomen
Gene expression
Gene Expression Regulation, Neoplastic
HDAC inhibitor
histone acetylation
Histone Deacetylase Inhibitors - metabolism
Histones - metabolism
Humans
Isoenzymes - metabolism
L-Lactate Dehydrogenase - metabolism
LDHB
Male
Medical prognosis
Medical sciences
Metastasis
microRNA
MicroRNAs - genetics
MicroRNAs - metabolism
Middle Aged
miR-375
Multivariate analysis
Oligonucleotide Array Sequence Analysis
Peptides, Cyclic - metabolism
Radiation therapy
RNA Interference
RNA, Small Interfering
Squamous cell carcinoma
Studies
Tumors
title Identification of novel molecular targets regulated by tumor suppressive miR-375 induced by histone acetylation in esophageal squamous cell carcinoma
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