کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10229285 | 518 | 2013 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bone grafts engineered from human adipose-derived stem cells in dynamic 3D-environments
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Modular tissue engineering (TE) is a promising alternative to overcome the limits in traditional TE. In the present study, adipose tissue derived stem cells (ADSC)-laden microcarriers are used as building blocks (microtissues) that self-assemble into macrotissues in a bottom-up approach. These bone grafts were compared with a classical top-down approach (scaffolds). This concept was compared with bone marrow derived stem cells (BMSC) as cell source. Cells were immunophenotypically analyzed, followed by 2D/3D osteogenic differentiation in static/dynamic conditions. The bone graft quality was evaluated by (immuno)histochemistry and gene expression. After 6 weeks of dynamic culturing, scaffolds were highly colonized although not in the center and the osteogenic gene expression was higher in contrast to static cultures. A cell-to-microcarrier ratio of 5 Ã 106 cells-0.09 g microcarriers leaded to aggregate formation resulting in microtissues with subsequent macrotissue formation. ADSC/BMSC on scaffolds showed a downregulation of Runx2 and collagen I, demonstrating the end-stage, in contrary to microcarriers, where an upregulation of Runx2, collagen I together with BSP and osteocalcin was observed. This paper showed that high quality bone grafts (2 cm³) can be engineered in a bottom-up approach with cell-laden microcarriers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 34, Issue 4, January 2013, Pages 1004-1017
Journal: Biomaterials - Volume 34, Issue 4, January 2013, Pages 1004-1017
نویسندگان
Heidi A. Declercq, Tamara De Caluwé Tamara De Caluwé, Olga Krysko, Claus Bachert, Maria J. Cornelissen,