Document Detail

p53 Actions on MicroRNA Expression and Maturation Pathway.
MedLine Citation:
PMID:  23150446     Owner:  NLM     Status:  Publisher    
The tumor suppressor p53 orchestrates multiple cellular pathways as a central node of anti-oncogenic programs in response to DNA damage, oncogene activation, and several stresses. In addition to the principal role as a transcription factor that transactivates many target genes involved in apoptosis and cell cycle control, p53 has been shown to exert various transactivation-independent effects both in the nucleus and in the cytoplasm. Diversity of p53 activities is further emphasized by the recent studies revealing the close interaction between the p53 and microRNA (miRNA) world. We recently demonstrated that p53 promotes the processing of several primary miRNA transcripts through association with Drosha, a central RNase III in miRNA biogenesis, under DNA damage-inducing conditions. In contrast to wild-type p53, cancer-derived p53 mutants attenuate miRNA maturation. These findings reveal a novel aspect of p53 activities and suggest complex crosstalks between miRNA biogenesis and intracellular signaling pathways. In this chapter, we describe the methods for evaluation of the effects of p53 on miRNA expression, an interaction between pri-miRNA and Drosha complex, and pri-miRNA processing activity of the Drosha complex.
Hiroshi I Suzuki; Kohei Miyazono
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Publication Detail:
Journal Detail:
Title:  Methods in molecular biology (Clifton, N.J.)     Volume:  962     ISSN:  1940-6029     ISO Abbreviation:  Methods Mol. Biol.     Publication Date:  2013  
Date Detail:
Created Date:  2012-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9214969     Medline TA:  Methods Mol Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  165-181     Citation Subset:  -    
Department of Molecular Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
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