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2014 ; 4
(ä): 7146
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Characteristics of long non-coding RNAs in the Brown Norway rat and alterations
in the Dahl salt-sensitive rat
#MMPMID25413633
Wang F
; Li L
; Xu H
; Liu Y
; Yang C
; Cowley AW Jr
; Wang N
; Liu P
; Liang M
Sci Rep
2014[Nov]; 4
(ä): 7146
PMID25413633
show ga
Long non-coding RNAs (lncRNAs) are potentially important mediators of genomic
regulation. lncRNAs, however, remain poorly characterized in the rat model
organism widely used in biomedical research. Using poly(A)-independent and
strand-specific RNA-seq, we identified 1,500 to 1,800 lncRNAs expressed in each
of the following tissues of Brown Norway rats: the renal cortex, renal outer
medulla, liver, cardiac left ventricle, adrenal gland, and hypothalamus.
Expression and the binding of histone H3K4me3 to promoter regions were confirmed
for several lncRNAs. Rat lncRNA expression appeared to be more tissue-specific
than mRNA. Rat lncRNAs had 4.5 times fewer exons and 29% shorter transcripts than
mRNA. The median cumulative abundance of rat lncRNAs was 53% of that of mRNA.
Approximately 28% of the lncRNAs identified in the renal outer medulla appeared
to lack a poly(A) tail. Differential expression of 74 lncRNAs was detected in the
renal outer medulla between Dahl SS rats, a model of salt-sensitive hypertension,
and salt-insensitive, congenic SS.13(BN26) rats fed a high-salt diet. Two of the
differentially expressed lncRNAs, which were confirmed, were located within the
congenic region and contained several sequence variants. The study identified
genome-wide characteristics of lncRNAs in the rat model and suggested a role of
lncRNAs in hypertension.