title: A microRNA polycistron as a potential human oncogene.
abstract: To date, more than 200 microRNAs have been described in humans; however, the precise functions of these regulatory, non-coding RNAs remains largely obscure. One cluster of microRNAs, the mir-17-92 polycistron, is located in a region of DNA that is amplified in human B-cell lymphomas. Here we compared B-cell lymphoma samples and cell lines to normal tissues, and found that the levels of the primary or mature microRNAs derived from the mir-17-92 locus are often substantially increased in these cancers. Enforced expression of the mir-17-92 cluster acted with c-myc expression to accelerate tumour development in a mouse B-cell lymphoma model. Tumours derived from haematopoietic stem cells expressing a subset of the mir-17-92 cluster and c-myc could be distinguished by an absence of apoptosis that was otherwise prevalent in c-myc-induced lymphomas. Together, these studies indicate that non-coding RNAs, specifically microRNAs, can modulate tumour formation, and implicate the mir-17-92 cluster as a potential human oncogene.
authors.affiliation: Cold Spring Harbor Laboratory, Watson School of Biological Sciences, 1 Bungtown Road, Cold Spring Harbor, New York 11724, USA.
authors.forename: Lin
authors.initials: L
authors.lastname: He
authors.forename: J Michael
authors.initials: JM
authors.lastname: Thomson
authors.forename: Michael T
authors.initials: MT
authors.lastname: Hemann
authors.forename: Eva
authors.initials: E
authors.lastname: Hernando-Monge
authors.forename: David
authors.initials: D
authors.lastname: Mu
authors.forename: Summer
authors.initials: S
authors.lastname: Goodson
authors.forename: Scott
authors.initials: S
authors.lastname: Powers
authors.forename: Carlos
authors.initials: C
authors.lastname: Cordon-Cardo
authors.forename: Scott W
authors.initials: SW
authors.lastname: Lowe
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Hannon
authors.forename: Scott M
authors.initials: SM
authors.lastname: Hammond
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D004195:Disease Models, Animal; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D005796:Genes / Q000235:genetics*; D016259:Genes, myc / Q000235:genetics; D006801:Humans; D016393:Lymphoma, B-Cell / Q000235:genetics*; D051379:Mice; D035683:MicroRNAs / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family / Q000235:genetics; D009857:Oncogenes / Q000235:genetics*; D010641:Phenotype; D016271:Proto-Oncogene Proteins c-myc / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: D035683:MicroRNAs; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger