Abstract:
:A role for microRNA (miRNA) has been recognized in nearly every biologic system examined thus far. A complete delineation of their role must be preceded by the identification of all miRNAs present in any system. We elucidated the complete small RNA transcriptome of normal and malignant B cells through deep sequencing of 31 normal and malignant human B-cell samples that comprise the spectrum of B-cell differentiation and common malignant phenotypes. We identified the expression of 333 known miRNAs, which is more than twice the number previously recognized in any tissue type. We further identified the expression of 286 candidate novel miRNAs in normal and malignant B cells. These miRNAs were validated at a high rate (92%) using quantitative polymerase chain reaction, and we demonstrated their application in the distinction of clinically relevant subgroups of lymphoma. We further demonstrated that a novel miRNA cluster, previously annotated as a hypothetical gene LOC100130622, contains 6 novel miRNAs that regulate the transforming growth factor-β pathway. Thus, our work suggests that more than a third of the miRNAs present in most cellular types are currently unknown and that these miRNAs may regulate important cellular functions.
journal_name
Bloodjournal_title
Bloodauthors
Jima DD,Zhang J,Jacobs C,Richards KL,Dunphy CH,Choi WW,Au WY,Srivastava G,Czader MB,Rizzieri DA,Lagoo AS,Lugar PL,Mann KP,Flowers CR,Bernal-Mizrachi L,Naresh KN,Evens AM,Gordon LI,Luftig M,Friedman DR,Weinberg JBdoi
10.1182/blood-2010-05-285403subject
Has Abstractpub_date
2010-12-02 00:00:00pages
e118-27issue
23eissn
0006-4971issn
1528-0020pii
blood-2010-05-285403journal_volume
116pub_type
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