miRNA-34c overexpression causes dendritic loss and memory decline

Yu Chia Kao, I. Fang Wang, Kuen Jer Tsai

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Microribonucleic acids (miRNAs) play a pivotal role in numerous aspects of the nervous system and are increasingly recognized as key regulators in neurodegenerative diseases. This study hypothesized that miR-34c, a miRNA expressed in mammalian hippocampi whose expression level can alter the hippocampal dendritic spine density, could induce memory impairment akin to that of patients with Alzheimer’s disease (AD) in mice. In this study, we showed that miR-34c overexpression in hippocampal neurons negatively regulated dendritic length and spine density. Hippocampal neurons transfected with miR-34c had shorter dendrites on average and fewer filopodia and spines than those not transfected with miR-34c (control mice). Because dendrites and synapses are key sites for signal transduction and fundamental structures for memory formation and storage, disrupted dendrites can contribute to AD. Therefore, we supposed that miR-34c, through its effects on dendritic spine density, influences synaptic plasticity and plays a key role in AD pathogenesis.

Original languageEnglish
Article number2323
JournalInternational journal of molecular sciences
Issue number8
Publication statusPublished - Aug 2018
Externally publishedYes


  • Alzheimer’s disease
  • Dendritic spine
  • miR-34c

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


Dive into the research topics of 'miRNA-34c overexpression causes dendritic loss and memory decline'. Together they form a unique fingerprint.

Cite this