• size-controlled insulin-secreting cell clusters

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 676
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    • شماره تماس دبیرخانه رویداد: -
     the search for an effective cure for type i diabetes from the transplantation of encapsulated pancreatic β-cell clusters has so far produced sub-optimal clinical outcomes. previous efforts have not controlled the size of transplanted clusters, a parameter implicated in affecting long-term viability and the secretion of therapeutically sufficient insulin. here we demonstrate a method based on covalent attachment of patterned laminin for fabricating uniformly size-controlled insulin-secreting cell clusters. we show that cluster size within the range 40–120 μm in diameter affects a variety of therapeutically relevant cellular responses including insulin expression, content and secretion. our studies elucidate two size-dependent phenomena: (1) as the cluster size increases from 40 μm to 60 μm, glucose stimulation results in a greater amount of insulin produced per cell; and (2) as the cluster size increases beyond 60 μm, sustained glucose stimulation results in a greater amount of insulin secreted per cell. our study describes a method for producing uniformly sized insulin-secreting cell clusters, and since larger cluster sizes risk nutrient availability limitations, our data suggest that 100–120 μm clusters may provide optimal viability and efficacy for encapsulated β-cell transplants as a treatment for type i diabetes and that further in vivo evaluation is warranted.

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