A next-generation iPSC-derived forebrain organoid model of tauopathy with tau fibrils by AAV-mediated gene transfer

Hiroko Shimada, Yuta Sato, Takashi Sasaki, Aki Shimozawa, Kent Imaizumi, Tomoko Shindo, Sachiyo Miyao, Kosuke Kiyama, Takahiro Kondo, Shinsuke Shibata, Seiji Ishii, Junro Kuromitsu, Hirofumi Aoyagi, Daisuke Ito, Hideyuki Okano

Research output: Contribution to journalArticlepeer-review

Abstract

It is known that the human cellular models of Alzheimer's disease (AD) and tauopathy can only recapitulate the very early stage of the disease. To overcome these limitations, we developed a technology to make forebrain organoids (FBOs) from feeder-free induced pluripotent stem cells (iPSC)s by regulating a FGF2 concentration and applied this method to generate FBOs from patients with familial AD (fAD FBOs). The obtained fAD FBOs recapitulated the amyloid-β pathology and increased tau phosphorylation but not tau aggregates. To fully induce the tau pathology, FBOs were injected with adeno-associated virus (AAV)-expressing P301L mutant tau. In these Tau-P301L FBOs, tau fibrils were observed in the neuronal cell body and neurites with immunoelectron microscopy, in addition to the sarkosyl-insoluble and thioflavin S-positive phospho-tau aggregates. Collectively, this model can be used as a platform for investigating pathogenetic mechanisms and evaluation of target molecules for drug discovery for tauopathy.

Original languageEnglish
Article number100289
JournalCell Reports Methods
Volume2
Issue number9
DOIs
Publication statusPublished - 2022 Sep 19

Keywords

  • AAV
  • Alzheimer's disease
  • FGF2
  • brain organoids
  • feeder-free iPSCs
  • tau
  • tauopathy

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Genetics
  • Radiology Nuclear Medicine and imaging
  • Computer Science Applications

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