Abstract:
:Analysis of the microRNA transcriptome following dexa- methasone treatment of the acute lymphocytic leukemia (ALL) cell line RS4;11 showed a global down-regulation of microRNA levels. MIR17HG was rapidly down-regulated following treatment, with chromatin immunoprecipitation (ChIP) analysis demonstrating the promoter to be a direct target of glucocorticoid (GC)-transcriptional repression and revealing the miR17-92 cluster as a prime target for dexamethasone-induced repression. The loss of miR17 family expression and concomitant increases in the miR17 target Bim occurred in an additional ALL cell line SUP-B15 but not in the dexamethasone-resistant REH. Alteration of miR17 levels through up-regulation or inhibition resulted in an decrease and increase, respectively, in Bim protein levels and dexamethasone-induced cell death. Primary ex vivo ALL cells that underwent apoptosis induced by dexamethasone also down-regulated miR17 levels. Thus, down-regulation of miR17 plays an important role in glucocorticoid-induced cell death suggesting that targeting miR17 may improve the current ALL combination therapy.
journal_name
Leuk Lymphomajournal_title
Leukemia & lymphomaauthors
Harada M,Pokrovskaja-Tamm K,Söderhäll S,Heyman M,Grander D,Corcoran Mdoi
10.3109/10428194.2012.678004subject
Has Abstractpub_date
2012-10-01 00:00:00pages
2041-50issue
10eissn
1042-8194issn
1029-2403journal_volume
53pub_type
杂志文章abstract::Abstract Increasing manganese superoxide dismutase (MnSOD) expression can suppress the malignant phenotype in various cancer cell lines and suppress tumor formation in xenograft and transgenic mouse models. A mimic of manganese superoxide dismutase (MnSODm), synthesized by a chemical method, has been shown to possess ...
journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 临床试验,杂志文章
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 杂志文章,评审
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
pub_type: 杂志文章
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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journal_title:Leukemia & lymphoma
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