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  • mimicking normal tissue architecture and perturbation in cancer with engineered micro-epidermis

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1391/01/01
    • تاریخ انتشار در تی پی بین: 1391/01/01
    • تعداد بازدید: 627
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     correct tissue architecture is essential for normal physiology, yet there have been few attempts to recreate tissues using micro-patterning. we have used polymer brush micro-engineering to generate a stratified micro-epidermis with fewer than 10 human keratinocytes. epidermal stem cells are captured on 100 μm diameter circular collagen-coated disks. within 24 h they assemble a stratified micro-tissue, in which differentiated cells have a central suprabasal location. for rings with a non-adhesive centre of up to 40 μm diameter, cell–cell and cell–matrix adhesive interactions together result in correct micro-epidermis assembly. assembly requires actin polymerization, adherens junctions and desmosomes, but not myosin ii-mediated contractility nor coordinated cell movement. squamous cell carcinoma cells on micro-patterned rings exhibit disturbed architecture that correlates with the characteristics of the original tumours. the micro-epidermis we have generated provides a new platform for screening drugs that modulate tissue assembly, quantifying tissue stratification and investigating the properties of tumour cells.

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