Nondestructive Characterization of Stem Cell Neurogenesis by a Magneto-Plasmonic Nanomaterial-Based Exosomal miRNA Detection

Jin Ho Lee, Jin Ha Choi, Sy Tsong Dean Chueng, Thanapat Pongkulapa, Letao Yang, Hyeon Yeol Cho, Jeong Woo Choi, Ki Bum Lee

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


The full realization of stem cell-based treatments for neurodegenerative diseases requires precise control and characterization of stem cell fate. Herein, we report a multifunctional magneto-plasmonic nanorod (NR)-based detection platform to address the limitations associated with the current destructive characterization methods of stem cell neurogenesis. Exosomes and their inner contents have been discovered to play critical roles in cell-cell interactions and intrinsic cellular regulations and have received wide attention as next-generation biomarkers. Moreover, exosomal microRNAs (miRNA) also offer an essential avenue for nondestructive molecular analyses of cell cytoplasm components. To this end, our developed nondestructive, selective, and sensitive detection platform has (i) an immunomagnetic active component for exosome isolation and (ii) a plasmonic/metal-enhanced fluorescence component for sensitive exosomal miRNA detection to characterize stem cell differentiation. In a proof-of-concept demonstration, our multifunctional magneto-plasmonic NR successfully detected the expression level of miRNA-124 and characterized neurogenesis of human-induced pluripotent stem cell-derived neural stem cells in a nondestructive and efficient manner. Furthermore, we demonstrated the versatility and feasibility of our multifunctional magneto-plasmonic NRs by characterizing a heterogeneous population of neural cells in an ex vivo rodent model. Collectively, we believe our multifunctional magneto-plasmonic NR-based exosomal miRNA detection platform has a great potential to investigate the function of cell-cell interactions and intrinsic cellular regulators for controlling stem cell differentiation.

Original languageEnglish (US)
Pages (from-to)8793-8803
Number of pages11
JournalACS Nano
Issue number8
StatePublished - Aug 27 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


  • exosomal miRNAs
  • magneto-plasmonic nanorods
  • neuronal differentiation
  • nondestructive characterization
  • stem cells


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