화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.62, 352-361, June, 2018
Recapitulation of cancer stem cell niches in glioblastoma on 3D microfluidic cell culture devices under gravity-driven perfusion
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The low survival rate of patients with glioblastoma is in part due to the heterogeneity in the cellVpopulation of glioblastoma that includes cancer stem cells (CSCs). CSC niches include a hypoxic core thatVis also closely linked to self-renewal ability, migration, and drug resistance. Here, we report a CSC cultureVmethod in three-dimensional microfluidic cell culture devices under gravity-driven perfusion, which weVdub hypoxia chips (H-chips). In H-chips, glioblastoma cells, U87, spontaneously formed spheroids withinV12 h, even without any addition of growth factors. Compared to monolayer-cultured cells in dishes,Vspheroids in H-chips showed higher expression of CSC markers, such as hypoxia-inducible factor-1aV(HIF-1α), CD133, and nestin. Spheroids in H-chips were more resistant to doxorubicin than monolayer-Vcultured ones in dishes. Transcriptional profiling revealed that the expression of interleukin-6 (IL-6), oneVof the inflammatory cytokines, was higher in spheroids in H-chips than in monolayer-cultured cells inVdishes. IL-6 depleted cells failed to form spheroids in H-chips, and their drug resistance decreased. TheseVresults suggest that in H-chips, glioblastoma cells increased the production of IL-6, and promotedVspheroid formation and other cancer stem cell properties, such as drug resistance. Our microfluidic cellVculture method is highly useful for recapitulating CSC niches.
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