کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3379719 1220180 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ایمونولوژی، آلرژی و روماتولوژی
پیش نمایش صفحه اول مقاله
Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit
چکیده انگلیسی

SummaryObjectiveRecombinant human type II collagen (rhCII) gels combined with autologous chondrocytes were tested as a scaffold for cartilage repair in rabbits in vivo.MethodAutologous chondrocytes were harvested, expanded and combined with rhCII-gel and further pre-cultivated for 2 weeks prior to transplantation into a 4 mm diameter lesion created into the rabbit's femoral trochlea (n = 8). Rabbits with similar untreated lesions (n = 7) served as a control group.ResultsSix months after the transplantation the repair tissue in both groups filled the lesion site, but in the rhCII-repair the filling was more complete. Both repair groups also had high proteoglycan and type II collagen contents, except in the fibrous superficial layer. However, the integration to the adjacent cartilage was incomplete. The O'Driscoll grading showed no significant differences between the rhCII-repair and spontaneous repair, both representing lower quality than intact cartilage. In the repair tissues the collagen fibers were abnormally organized and oriented. No dramatic changes were detected in the subchondral bone structure. The repair cartilage was mechanically softer than the intact tissue. Spontaneously repaired tissue showed lower values of equilibrium and dynamic modulus than the rhCII-repair. However, the differences in the mechanical properties between all three groups were insignificant.ConclusionWhen rhCII was used to repair cartilage defects, the repair quality was histologically incomplete, but still the rhCII-repairs showed moderate mechanical characteristics and a slight improvement over those in spontaneous repair. Therefore, further studies using rhCII for cartilage repair with emphasis on improving integration and surface protection are required.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Osteoarthritis and Cartilage - Volume 21, Issue 3, March 2013, Pages 481–490
نویسندگان
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