Breast cancer metastasis suppressor 1 (BRMS1) inhibits osteopontin transcription by abrogating NF-kappaB activation.
Breast cancer metastasis suppressor 1 (BRMS1) inhibits osteopontin transcription by abrogating NF-kappaB activation.
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DOI:
10.1186/1476-4598-6-6
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发表时间:
2007-01-16
期刊:
影响因子:
37.3
通讯作者:
Shevde LA
中科院分区:
文献类型:
--
作者:
Samant RS;Clark DW;Fillmore RA;Cicek M;Metge BJ;Chandramouli KH;Chambers AF;Casey G;Welch DR;Shevde LA
Osteopontin (OPN), a secreted phosphoglycoprotein, has been strongly associated with tumor progression and aggressive cancers. MDA-MB-435 cells secrete very high levels of OPN. However metastasis-suppressed MDA-MB-435 cells, which were transfected with breast cancer metastasis suppressor 1 (BRMS1), expressed significantly less OPN. BRMS1 is a member of mSin3-HDAC transcription co-repressor complex and has been shown to suppress the metastasis of breast cancer and melanoma cells in animal models. Hence we hypothesized that BRMS1 regulates OPN expression. The search for a BRMS1-regulated site on the OPN promoter, using luciferase reporter assays of the promoter deletions, identified a novel NF-κB site (OPN/NF-κB). Electrophoretic mobility shift assays and chromatin immunoprecipitations (ChIP) confirmed this site to be an NF-κB-binding site. We also show a role of HDAC3 in suppression of OPN via OPN/NF-κB. Our results show that BRMS1 regulates OPN transcription by abrogating NF-κB activation. Thus, we identify OPN, a tumor-metastasis activator, as a crucial downstream target of BRMS1. Suppression of OPN may be one of the possible underlying mechanisms of BRMS1-dependent suppression of tumor metastasis.
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影响因子:
4.8
作者:
Meehan, WJ;Samant, RS;Welch, DR
通讯作者:
Welch, DR
影响因子:
11.2
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Cicek,M;Fukuyama,R;Casey,G
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Casey,G
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11.5
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4.8
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4.4
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Schjerven, H;Brandtzaeg, P;Johansen, FE
通讯作者:
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