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2014 ; 42
(11
): 1791-5
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Rapid production of novel pre-microRNA agent hsa-mir-27b in Escherichia coli
using recombinant RNA technology for functional studies in mammalian cells
#MMPMID25161167
Li MM
; Wang WP
; Wu WJ
; Huang M
; Yu AM
Drug Metab Dispos
2014[Nov]; 42
(11
): 1791-5
PMID25161167
show ga
Noncoding microRNAs (miRNAs or miRs) have been revealed as critical epigenetic
factors in the regulation of various cellular processes, including drug
metabolism and disposition. However, research on miRNA functions is limited to
the use of synthetic RNA and recombinant DNA agents. Herein, we show that novel
pre-miRNA-27b (miR-27b) agents can be biosynthesized in Escherichia coli using
recombinant RNA technology, and recombinant transfer RNA (tRNA)/mir-27b chimera
was readily purified to a high degree of homogeneity (>95%) using anion-exchange
fast protein liquid chromatography. The tRNA-fusion miR-27b was revealed to be
processed to mature miRNA miR-27b in human carcinoma LS-180 cells in a dose- and
time-dependent manner. Moreover, recombinant tRNA/miR-27b agents were
biologically active in reducing the mRNA and protein expression levels of
cytochrome P450 3A4 (CYP3A4), which consequently led to lower midazolam
1'-hydroxylase activity. These findings demonstrate that pre-miRNA agents can be
produced by recombinant RNA technology for functional studies.