Clarification of Mechanism of the Tendon/Ligament Matrix Remodeling Induced by Various Mesenchymal Cells and Its Molecular Control

1)应激剥夺显著增强髌腱成纤维细胞中Mn-SOD、酪氨酸酶相关蛋白、KIAA 1199相关蛋白、KIAA 1199和PDGFR-α的基因表达。此外，Mn-SOD在体内在mRNA和蛋白质水平上都过表达。应激剥夺还显著增强髌腱中IL-1 β、TNF-α和TGF-β的表达，而对PDGF-B和bFGF的表达没有显著影响。移植肌腱成纤维细胞中VEGF在2周时呈高表达，3周时达高峰。2）肌腱组织来源的外源性成纤维细胞（EFs）增殖率明显低于肌腱组织来源的内源性成纤维细胞（IFs）。细胞培养10 ~ 14 d后，EFs的浸润率明显高于IFs。两种成纤维细胞体外浸润到髌腱中显著降低了筋膜的力学性能， 关于我们 3）TGF-β 1的应用显著降低了由应力剥夺引起的髌腱机械性能的劣化，而抗TGF-β抗体的应用显著增强了降解。对于原位冻融的前交叉韧带和移植的髌腱，TGF-β 1的应用没有显示出任何显著的效果。关于在髌腱中产生的缺损中再生的纤维组织，TGF-β 1的应用显著增加了机械性能。应用VEGF对原位冻融ACL的血管再生有显著促进作用，而对力学性能无显著影响。4）应用在TGF-β 1-补充培养基中培养的滑膜组织来源的细胞显著增加了ACL重建中移植肌腱的力学性能，并在髌腱中产生的缺损中再生了纤维组织。少

1)Stress deprivation significantly enhanced gene expression of Mn-SOD, Tyrosinase-related protein, KIAA1199-related protein, KIAA1199, and PDGFR-alpha in fibroblasts in the patellar tendon. In addition, Mn-SOD was over-expressed in vivo at both the m-RNA and protein levels. Stress deprivation also significantly enhanced expression of Expression of IL-1beta, TNF-alpha, and TGF-beta in the patellar tendon, while it provided no significant effects to expression of PDGF-B and bFGF. In fibroblasts of the grafted tendon, VEGF was over-expressed at 2 weeks and showed a peak at 3 weeks.2)The proliferation rate of extrinsic fibroblasts (EFs) derived from the tendon tissue was significantly lower was significantly lower than that of intrinsic fibroblasts (IFs) in the tendon. The infiltrative rate was significantly higher in EFs than in IFs on 10 to 14 days after cell culture. Ex vivo infiltration of both fibroblasts into the patellar tendon significantly reduced the mechanical properties of fasc … More icles from the tendon.3)An application of TGF-beta1 significantly reduced the deterioration of mechanical properties of the patellar tendon caused by stress deprivation, while an application of anti-TGF-beta antibody significantly enhanced the degradation. Concerning the in situ frozen-thawed anterior cruciate ligament and the grafted patellar tendon, the TGF-beta1 application did not show' any significant effects. Regarding a fibrous tissue regenerated in a defect created in the patellar tendon, the TGF-beta1 application significantly increased the mechanical properties. An application of VEGF to the in situ frozen-thawed ACL significantly enhanced vascular regeneration, while it did not significantly affect the mechanical properties.4)An application of synovial tissue-derived cells cultured in TGF-beta1-suplimented medium significantly increased the mechanical properties of the grafted tendon in ACL reconstruction and the fibrous tissue regenerated in a defect created in the patellar tendon. Less