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Biography

Zhi-cheng Xiao, PhD. received a Doctor of Natural Science degree from Swiss Federal Institute of Technology, Zurich. He is current Professor in Monash University. He is the CEO& CFO of iNovaFarm, a premier Bio-Tech company. He has published more than 100 papers in reputed journals and serving as editorial board members of more than 10 journals.

Abstract

Amyloid precursor protein (APP) is best known for its involvement in the pathogenesis of Alzheimer’s disease. We have previously demonstrated that APP intracellular domain (AICD) regulates neurogenesis; however, the mechanisms underlying AICD-mediated regulation of neuronal diff erentiation are not yet fully characterized. Using genome-wide chromatin immune precipitation approaches, we found that AICD is specifi cally recruited to the regulatory regions of several microRNA genes, and acts as a transcriptional regulator for miR-663, miR-3648 and miR-3687 in human neural stem cells. Functional assays show that AICD negatively modulates neuronal diff erentiation through miR-663, a primate-specifi c microRNA. Microarray data further demonstrate that miR-663 suppresses the expression of multiple genes implicated in neurogenesis, including FBXL18 and CDK6. Our results indicate that AICD has a novel role in suppression of neuronal diff erentiation via transcriptional regulation of miR-663 in human neural stem cells.