Abstract:
:MicroRNA (miRNAs) are short non-coding RNA molecules that downregulate gene expression at post-transcriptional level. miRNAs are post-transcriptional regulators of gene expression important for neuron development and function. This report demonstrated that a putative and chemically synthesized miRNA rno-mir-541 played an important role in the neuron development. Differentiation of PC12 cells with nerve growth factor (NGF) is associated with neurite outgrowth, a process that involves upregulation of Synapsin I. We predicted, detected and assessed the expression levels of a number of possible miRNAs for synapsin I in rats and our outcomes showed that rno-mir-541 was associated with rat synapsin I expression. miR-541, a brain specific miRNA, plays an important role in repressing neurite extension in cultured PC12 neurons. The neurites of PC12 cells was shortened drasticly as a result of the overexpression of rno-mir-541. In contrast, the neurites of PC12 cell developed well after the knockdown of rno-mir-541 by RNA interference. Our study showed that rno-mir-541 played an important role in neuron-cell proliferation and neurite outgrowth through suppressing the expression of its target gene synapsin I. Furthermore, the introduction of NGF causes downregulation of miR-541, de-repression of its target, Synapsin-I and allows for neuritogenesis. Thus, miR-541 functions in neuronal precursors as an endogenous conditional component between NGF and Synapsin-I.
journal_name
Cell Biochem Functjournal_title
Cell biochemistry and functionauthors
Zhang J,Zhang J,Liu LH,Zhou Y,Li YP,Shao ZH,Wu YJ,Li MJ,Fan YY,Shi HJdoi
10.1002/cbf.1747subject
Has Abstractpub_date
2011-06-01 00:00:00pages
279-86issue
4eissn
0263-6484issn
1099-0844journal_volume
29pub_type
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