MiR-30c: A novel regulator of salt tolerance in tilapia

Author:

Yan, Biao  Guo, Jin-Tao  Zhao, Li-Hui  Zhao, Jin-Liang  

Journal:

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS

Issue Date:

2012

Abstract(summary):

miRNAs comprise a class of similar to 22 nt noncoding RNAs that modulate the stability and/or translational potential of their mRNA targets. Emerging data suggest that stress conditions can alter the biogenesis of miRNAs, thereby changing the expression of mRNA targets. Here, we reveal that miR-30c, a kidney-enriched miRNA, emerges as a crucial osmoregulator in Nile tilapia. miR-30c loss of function leads to an inability to respond to osmotic stress. We identify HSP70 as one of the direct regulatory targets of miR-30c. miR-30c directly regulates HSP70 by targeting its 3'-UTR, and inhibition of miR-30c substantially increases HSP70 mRNA level in vivo. Taken together, our experiments suggest that miRNAs participate in a regulatory circuit that allows rapid gene program transitions in response to osmotic stress. miR-30c may be developed as a molecular marker to assist to breed or genetically engineer salt tolerant species. (c) 2012 Elsevier Inc. All rights reserved.

Page:

315---320