组织工程软骨移植修复兔膝关节软骨缺损

研究用组织工程的方法进行差了软骨缺损修复的基本原理。方法取新生兔关节－干骺复后体软骨,胶原酶消化,将所获软骨细胞种入９６孔板内几丁质纤维无纺布上。结果培养２１天时形成“膜状软骨”,至１１０天时形成直径为４．４ｍｍ的“圆盘状软骨”。经Ｓａｆｒａｎ“Ｏ”ｉｖｓ ｑｃ ｙｇｈ ｐｕ 其基质富含蛋白多糖,原位杂交法 产其软骨细胞表达Ⅱ型胶原ｍＲＮＡ。将培养２１天的“膜状软骨”移植于成年兔膝关节圆形全厚缺损

Tissue engineering of hyaline cartilage

OBJECTIVE: To study the new way to repair the defect of the articular cartilage. METHOD: The articular-epiphyseal cartilage complexes from 8 newborn rabbits were enzymatically dissolved, and the chondrocytes were seeded onto the fibrous chitin mesh in a 96-well plate in DMEM medium. RESULT: Cultured for 21 days, the "membrane-like cartilage" was strong enough to be transferred. At the 110th day, the semitransparent cartilage discs were 4.4 mm in diameter and 14.8 mg in weightness. Staining of SatranO showed that engineered "cartilage" was bound of GAGs and the chondrocytes expressed the mRNA of type II collagen by in situ hybridization, which is resemble to that of the normal hyaline cartilage beside the biodegraded fibrous chitin embedded in. The "membrane-like cartilage" cultured for 21 days was grafted into the articular cartilage defects of knee of adult rabbits. Seven of 9 defects healed with new cartilage and the structure was well organized in 16 weeks. CONCLUSION: The biodegradable fibrous chitin is a good "matrix" for cartilage tissue engineering. The engineered "cartilage" is true hyaline cartilage, which is a new "alive cartilage tissue" for the repairment of the defect of articular cartilage.