Over-expression of Sox4 and β-catenin is associated with a less favorable prognosis of osteosarcoma / 华中科技大学学报（医学）（英德文版）

The purpose of this study was to examine the association of the expression of Sox4 and β-catenin with the prognosis of osteosarcoma. A total of 108 cases of conventional osteosarcoma were involved in this study and 28 cases of osteochondroma served as controls. The expression of Sox4 and β-catenin was detected by using immunohistochemical staining and Western blotting. The results showed that Sox4 and β-catenin were over-expressed in 67 (62.03%) and 62 (57.41%) of 108 osteosarcoma cases, while in only 3 (10.71%) and 5 (17.86%) of 28 controls, respectively (P<0.05 for all). The expression of Sox4 and β-catenin was associated with the distant metastasis, pathological grade and Enneking stage of patients with osteosarcoma (P<0.05 for all). The mean overall survival time and the 5-year-survival rate in osteosarcoma patients with Sox4 and β-catenin over-expressed were significantly reduced as compared with those in Sox4 and β-catenin low-expression group (P<0.05 for all). Cox multifactor regression analysis revealed that the distant metastasis, Enneking stage, and the expression of Sox4 and β-catenin were independent risk factors of patients with osteosarcoma (P<0.05 for all). The findings indicated that overexpression of Sox4 and β-catenin is associated with a poor prognosis of osteosarcoma.

Over-expression of Sox4 and β-catenin is associated with a less favorable prognosis of osteosarcoma / 华中科技大学学报（医学）（英德文版）

The purpose of this study was to examine the association of the expression of Sox4 and β-catenin with the prognosis of osteosarcoma. A total of 108 cases of conventional osteosarcoma were involved in this study and 28 cases of osteochondroma served as controls. The expression of Sox4 and β-catenin was detected by using immunohistochemical staining and Western blotting. The results showed that Sox4 and β-catenin were over-expressed in 67 (62.03%) and 62 (57.41%) of 108 osteosarcoma cases, while in only 3 (10.71%) and 5 (17.86%) of 28 controls, respectively (P<0.05 for all). The expression of Sox4 and β-catenin was associated with the distant metastasis, pathological grade and Enneking stage of patients with osteosarcoma (P<0.05 for all). The mean overall survival time and the 5-year-survival rate in osteosarcoma patients with Sox4 and β-catenin over-expressed were significantly reduced as compared with those in Sox4 and β-catenin low-expression group (P<0.05 for all). Cox multifactor regression analysis revealed that the distant metastasis, Enneking stage, and the expression of Sox4 and β-catenin were independent risk factors of patients with osteosarcoma (P<0.05 for all). The findings indicated that overexpression of Sox4 and β-catenin is associated with a poor prognosis of osteosarcoma.

Expression of hypoxia inducible factor-1alpha in long bone development / 中国骨伤

<p><b>OBJECTIVE</b>To observe dynamically the development of fetal long bone and detect the expression and distribution of HIF-1alpha,to investigate the expression pattern and possible effects of hypoxia inducible factor-1alpha (HIF-1alpha) in fetal long bone development of mouse.</p><p><b>METHODS</b>E12.5, E13.5, E14.5, E15.5, E16.5 and E17.5 pregnant C57BL6 mice were sacrificed. After sacrifice, the embryos were delivered by caesarean section. The development of fetal long bone was dynamically observed by stereoscopic microscope, and the distributional expression of HIF-1alpha protein was detected by using method of immunohistochemistry. The expression of HIF-1alpha mRNA and osteoblast marker gene at various stage were also detected by using methods of reverse transcription-polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>The cartilaginous long bone began to form and joints outline arised at E13.5, then the primary ossification center was observed at E14.5, showing opaque ossification under stereoscopic microscope,and then the osteogenesis expanded and extended to both sides. Immunohistochemistry demonstrated lots of HIF-1alpha protein positive chondrcytes in the center of primary ossification at E14.5, then they decreased dramatically. HIF-1alpha mRNA expressed at high level from E13.5 to E15.5, and then decreased to low level.</p><p><b>CONCLUSION</b>Fetal long bone development pattern appeared to be endochondral osteogenisis process, existing hypoxia microenviroment may increase HIF-1alpha mRNA expression and thus initiate the cascade of endochondral osteogenisis.</p>

Clinical effects of arthroscopic-assisted allograft reconstruction of anterior cruciate ligament injuries / 中华创伤杂志

Objective To determine 2-4 year intermediate-term clinical effects of deep-freezing bone-ACL-bone allograft plus endobutton plate fixation in reconstruction anterior cruciate ligament(ACL) injuries after ACL injury and estimate the feasibility and validity of the technique.Methods We car- ried out a retrospective study on 15 cases with ACL injury of lateral knee joint reconstructed with deep- freezing bone-ACL-bone allograft plus endobutton plate fixation method from September 1999 to October 2002.The average follow up was 36.9 months.The myodynamic recovery,muscular activity,Rom Lach- man test,Pivot shift test,Lysholm score and X-ray of tunnels enlargement at intermediate term were com- pared with normal ones.Results The circumference of thigh was(0.976?0.119)cm shorter than that of the normal side.Extension limitation of less than 3?was found in 12 cases and knee flexion limita- tion for below 5?in 13.Lachman test showed negative results.Lyshohn score was increased from preoper- ative 66.2?4.6 to postoperative 89.4?3.2.X-ray showed no tunnel enlargement.Conclusions Re- construction of ACL with deep-freezing bone-ACL-bone allograft plus endobutton plate fixation under ar- throscopy can attain equal length and anatomic reconstruction of ACL.Deep-freezing bone-ACL-bone is beneficial to functional recovery of ACL.