Long-term Culture of Human iPS Cell-derived Telencephalic Neuron Aggregates on Collagen Gel

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  • Oyama Hiroshi
    Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd. Graduate School of Life Science, Hokkaido University
  • Takahashi Koji
    Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd.
  • Tanaka Yoshikazu
    Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd.
  • Takemoto Hiroshi
    Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd.
  • Haga Hisashi
    Faculty of Advanced Life Science, Hokkaido University

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<p>It takes several months to form the 3-dimensional morphology of the human embryonic brain. Therefore, establishing a long-term culture method for neuronal tissues derived from human induced pluripotent stem (iPS) cells is very important for studying human brain development. However, it is difficult to keep primary neurons alive for more than 3 weeks in culture. Moreover, long-term adherent culture to maintain the morphology of telencephalic neuron aggregates induced from human iPS cells is also difficult. Although collagen gel has been widely used to support long-term culture of cells, it is not clear whether human iPS cell-derived neuron aggregates can be cultured for long periods on this substrate. In the present study, we differentiated human iPS cells to telencephalic neuron aggregates and examined long-term culture of these aggregates on collagen gel. The results indicated that these aggregates could be cultured for over 3 months by adhering tightly onto collagen gel. Furthermore, telencephalic neuronal precursors within these aggregates matured over time and formed layered structures. Thus, long-term culture of telencephalic neuron aggregates derived from human iPS cells on collagen gel would be useful for studying human cerebral cortex development.</p><p>Key words: Induced pluripotent stem cell, forebrain neuron, collagen gel, long-term culture</p>

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