西亚试剂：Immortalization of Erythroblasts by c-MYC and BCL-XL Enable

Immortalization of Erythroblasts by c-MYC and BCL-XL Enables Large-Scale Erythrocyte Production from Human Pluripotent Stem Cells

Sho-ichi Hirose， Naoya Takayama， Sou Nakamura， Kazumichi Nagasawa， Kiyosumi Ochi， Shinji Hirata， Satoshi Yamazaki， Tomoyuki Yamaguchi， Makoto Otsu， Shinya Sano， Nobuyasu Takahashi， Akira Sawaguchi， Mamoru Ito， Takashi Kato， Hiromitsu Nakauchi， Koji EtoSee

The lack of knowledge about the mechanism of erythrocyte biogenesis through self-replication makes the in vitro generation of large quantities of cells difficult. We show that transduction of c-MYC and BCL-XL into multipotent hematopoietic progenitor cells derived from pluripotent stem cells and gene overexpression enable sustained exponential self-replication of glycophorin A+ erythroblasts， which we term immortalized erythrocyte progenitor cells (imERYPCs). In an inducible expression system， turning off the overexpression of c-MYC and BCL-XL enabled imERYPCs to mature with chromatin condensation and reduced cell size， hemoglobin synthesis， downregulation of GCN5， upregulation of GATA1， and endogenous BCL-XL and RAF1， all of which appeared to recapitulate normal erythropoiesis. imERYPCs mostly displayed fetal-type hemoglobin and normal oxygen dissociation in vitro and circulation in immunodeficient mice following transfusion. Using critical factors to induce imERYPCs provides a model of erythrocyte biogenesis that could potentially contribute to a stable supply of erythrocytes for donor-independent transfusion.

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