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2014 ; 15
(1
): 333
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MicroRNA profiling of rats with ochratoxin A nephrotoxicity
#MMPMID24885635
Dai Q
; Zhao J
; Qi X
; Xu W
; He X
; Guo M
; Dweep H
; Cheng WH
; Luo Y
; Xia K
; Gretz N
; Huang K
BMC Genomics
2014[May]; 15
(1
): 333
PMID24885635
show ga
BACKGROUND: Nephrotoxicity is the most prominent one among the various toxicities
of ochratoxin A (OTA). MicroRNAs (miRNAs) are small non-coding RNAs that have an
impact on a wide range of biological processes by regulating gene expression at
post-transcriptional level or protein systhesis level. The objective of this
study is to analyze miRNA profiling in the kidneys of rats gavaged with OTA.
RESULTS: To profile miRNAs in the kidneys of rats with OTA nephrotoxicity,
high-throughput sequencing and bioinformatics approaches were applied to analyze
the miRNAs in the kidney of rats following OTA treatment. A total of 409 known
miRNAs and 8 novel miRNAs were identified in the kidney and the levels of the
novel miRNAs were varied in response to different doses of OTA. Expression of
miR-129, miR-130a, miR-130b, miR-141, miR-218b and miR-3588 were uniquely
suppressed in mid dose but then elevated in high dose, with opposite expression
to their target genes. The expression pattern was closely related with the "MAPK
signaling pathway". Dicer1 and Drosha were significantly suppressed, indicating
an impairment of miRNA biogenesis in response to OTA. CONCLUSIONS: The abrogation
of miRNA maturation process suggests a new target of OTA toxicity. Moreover, the
identification of the differentially expressed miRNAs provides us a molecular
insight into the nephrtoxicity of OTA.