“软骨康”对损伤关节软骨修复机制的初探

我们用中药软骨康,对全层缺损的兔膝关节股骨髁关节软骨,进行三周治疗,取得较为满意的效果。实验结果表明,软骨康在促进成纤维细胞分泌大量胶原纤维,促进组织再生;对血管增生和扩张血管加速局部血循环以及提高滑膜的增生和活性,使其参与损伤组织的再建,均有独到作用。     

离子色谱法测定硫酸软骨素的含量

建立了用离子色谱法测定硫酸软骨素的方法。在６ｍｏｌ／Ｌ盐酸介质中将硫酸软骨素水解生成等摩尔的硫酸根离子，然后用ＡｎｉｏｎＨＣ离子色谱柱进行分离，以硼酸钠／葡萄糖酸钠淋洗液为流动相，流速１．５ｍｌ／ｍｉｎ，电导检测器检测。硫酸根离子在０．００１～０．０８０ｍｇ／ｍｌ浓度范围内线性关系良好，相关系数为０．９９９４，最低检测浓度为０．０００６ｍｇ／ｍｌ。样品中硫酸根离子的加样回收率为９８．５１％～９９．５２％，硫酸软骨素原料药和注射液及鲨鱼软骨粉胶囊中硫酸软骨素测定的相对标准偏差分别为０．２５％，１．０６％和１．９６％。该方法已应用于多种硫酸软骨素制剂中硫酸软骨素的含量测定     

骺板软骨细胞复合三维支架体外构建组织工程软骨的研究

目的探讨将骺板软骨细胞复合三维支架经体外培养,构建组织工程软骨的效果及其生物学特点. 方法将3周龄幼兔第1代骺板软骨细胞与液态的生物凝胶混合,接种于聚磷酸钙纤维/L-聚乳酸(CPPF/PLLA)三维支架材料,构建组织工程软骨组织块,连续培养4周.行大体、倒置显微镜及组织学、Ⅰ型和Ⅱ型胶原免疫组织化学光镜观察,定量检测硫酸糖胺多糖(GAG)含量. 结果构建的组织工程软骨块在培养过程中能保持其初始外形,种子细胞呈稳定的三维均相分布,外观逐渐呈乳白色、半透明,硬度亦不断增加.培养1周有软骨细胞陷窝形成,2周后形成富含Ⅱ型胶原和蛋白聚糖、具有典型软骨组织结构的工程化软骨,且Ⅰ型胶原逐渐转为阴性.4周时构建软骨的组织结构与天然骺板软骨相类似,硫酸GAG含量平均为天然骺板软骨的34%以上. 结论骺板软骨细胞复合三维支架体外培养可生成典型软骨,且可形成类似天然骺板软骨的组织结构,能满足修复骺板缺损的基本要求.体外培养1～2周可能是植入体内修复骺板缺损的较佳时机.     

ULTRASTRUCTURAL INVESTIGATION ON THE ARTICULAR CARTILAGE FROM RABBIT KNEE JOINT AFTER IMMOBILIZATION IN CAST

The articular cartilages from the left knee of 30 rabbits immobilized in casts in functional position were studied under transmission electron microscope. The pathological changes which begin at early stage of immobilization included both degeneration and repair of cartilage. The striking morphological features observed were: (1) most chondrocytes in various layers of cartilage underwent progresive degeneration; (2) the concomitant abnormal proliferation of some chondrocytes happened in a brief period. The changes in mechanical stress caused by immobilization affected the nutrition of cartilage and finally led to its reactive structural reformation.     

Abnormality of type IX collagen in a patient with diastrophic dysplasia

There is growing evidence that a spectrum of chondrodysplasias are caused by mutations in the gene coding for type II collagen. The basic molecular defect in diastrophic dysplasia has not been defined, but it appears not to be in collagen type II. Cartilage contains other tissue-specific collagens, types IX, X, and XI, but no mutations have yet been found in their genes in clinical disease. Type IX collagen is hypothesized to play a role in the regulation of type II collagen fibril organization and structure in cartilage extracellular matrix. In this study, we have examined iliac crest growth cartilage from a patient with diastrophic dysplasia. Although collagen fibrils were markedly increased in diameter on transmission electron microscopy, type II collagen appeared to be normal biochemically. Type XI collagen was also normal. However, type IX collagen appeared abnormal on sodium dodecyl sulfate polyacrylamide gel electrophoresis with a pronounced excess of the COL1 domain of the molecule in pepsin extracts. The findings point to an abnormality in structure or metabolism of type IX collagen in diastrophic dysplasia. © 1994 Wiley-Liss, Inc.     

颞浅筋膜瓣包裹高密度聚乙烯-肋软骨复合支架一期耳廓再造术

目的探寻耳廓再造的良好手术方法。方法将高密度聚乙烯耳基架与肋软骨外耳轮形成复合支架，支架采用颞浅筋膜瓣包裹，颞浅筋膜瓣的表面采用邻近皮瓣和皮片覆盖，完成耳廓再造。结果自2000年1月至2003年8月利用该方法对8例先天性小耳进行耳廓再造术效果良好。结论通过该方法行耳廓再造，具备良好的外形和一定的弹性，外观逼真，手感良好。     

重组骨形态发生蛋白-2结合软骨下钻孔治疗犬关节软骨全层缺损的实验研究

目的 研究重组骨形态发生蛋白-2(rhBMP-2)结合软骨下骨钻孔治疗犬关节软骨全层缺损的可行性，为临床应用提供实验依据。方法 依照软骨缺损处理方法的不同将64侧股骨髁随机均分为4组：①结合组：软骨下骨钻孔 胶原海绵吸附rhBMP-2充填软骨缺损；②BMP组：胶原海绵吸附rhBMP-2充填软骨缺损；③钻孔组：单纯软骨下骨钻孔；④对照组：不作处理或单纯用胶原海绵填塞。术后2、4、8、12周取材观察其大体、光镜、透射电镜、免疫组织化学情况。结果 除对照组仅有纤维组织修复外，其余3组均有不同程度的软骨修复，但结合组的修复在组织细胞形态、超微结构、Ⅱ型胶原含量等方面均明显优于其他两组。结论rhBMP-2结合软骨下骨钻孔能有效修复犬膝关节软骨的全层缺损，该技术可行，有望在临床应用。     

The long-term results of meniscus transplantation for articular cartilage defects in the knee joint

The purpose of this study was to examine the long-term clinical results of meniscus transplantation for articular cartilage defects in the knee joint. The type of study was case series. From October 1990 to June 1995, eight cases underwent allogenic or autogenic meniscus transplantations for articular cartilage defects, and seven cases were available for follow-up evaluations. The age at surgery ranged from 14 to 42 years of age (average 22.5). In one case, transplantation of tissue-engineered cartilage was performed due to pain 5 years after surgery. The other six cases were followed up for 8–13 years (average 10.1). The size of the cartilage defect ranged from 1.0 to 6.3 cm² (average 2.8 cm²). Patients were evaluated with the Lysholm score and MR images. We also performed arthroscopic examinations in three cases at the final evaluation. This study leads to the conclusion that meniscus transplantation for articular cartilage damage is not comparable to autologous chondrocyte transplantation. Two cases showed a good clinical outcome but the tissue remained as fibrocartilage tissue in the long-term.