Vascular endothelial growth factor and its receptor expression during the process of fracture healing / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To study the expression regularity of vascular endothelial growth factor (VEGF) during the process of fracture healing, and the type of VEGF receptor expressed in the vascular endothelial cells of the fracture site.</p><p><b>METHODS</b>The fracture model was made in the middle part of left radius in 35 rabbits. The specimens from the fracture site were harvested at 8, 24, 72 hours and 1, 3, 5, 8 weeks, and then fixed, decalcified, and sectioned frozenly to detect the expression of VEGF and its receptor at the fracture site by in situ hybridization and immunochemical assays.</p><p><b>RESULTS</b>VEGF mRNA and VEGF expression was detected in many kinds of cells at the fracture site during 8 hours to 8 weeks after fracture. Flt1 receptor of VEGF was found in the vascular endothelial cells at the fracture site during 8 hours to 8 weeks after fracture, and strong expression of flk1 receptor was detected from 3 days to 3 weeks after fracture.</p><p><b>CONCLUSIONS</b>The expression of VEGF and flt1 receptor appears during the whole course of fracture healing, especially from 1 to 3 weeks. Flk1 receptor is highly expressed in a definite period after fracture. VEGF is proved to be involved in the vascular reconstruction and fracture healing.</p>

Controlled clinical trials on the pathological expressions of VEGF in patients with active ankylosing spondylitis / 中国骨伤

<p><b>OBJECTIVE</b>To investigate the pathological expression and significance of VEGF in patients with active ankylosing spondylitis.</p><p><b>METHODS</b>The expression of VEGF in the synovial tissues of cacroiliac joint of patients with active AS was detected by using in situ hybridization and the results were compared with those in the patients with pelvic fracture using image analysis system.</p><p><b>RESULTS</b>The positive expressions of VEGF in the synovial tissues of cacroiliac joint of patients with active AS were stronger than those in the control group (P<0.01).</p><p><b>CONCLUSION</b>VEGF are important factors in patients with active AS. They are tightly correlated with the process of osteoclasia and pathological new bone formation in the cacroiliac joint of patients with active AS. If we can reduce the expressions of VEGF in the patients with active AS, the process of osteoclasia and pathological new bone formation will be interrupted and this provides a new strategy for the treatment of ankylosing spondylitis.</p>

Identification of a novel regeneration-related gene H3 and its protein from the differential expression cDNA library of spinal cord injury in neonatal rats / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To clone and identify one novel regeneration related gene H(3) (CA854305) from the differential expression genes library we had set up before.</p><p><b>METHODS</b>Use the method of Northern blot to detect the different expressions of the novel gene under different situations, employ the technique of in silico cloning to scan the span of the novel gene, and analyze their sequences. Also we used reverse transcription PCR to validate the largest open reading frame.</p><p><b>RESULTS</b>Northern blotting results of H(3) (CA854305) showed that the transplanted group had more efficient and extensive expression than untreated and uninjured groups 5 days after spinal cord injury, while the untreated group had more extensive expression than uninjured group. It implied that H(3) might have some relationship with nerve regeneration after spinal cord injury. From the results of in silico cloning we got a longest contig of 1635 bp and an largest open reading frame of 542 bp from 49 to 591 bp correspondent with the Cozak rules. Reverse transcription PCR validated the largest open reading frame sequence primarily.</p><p><b>CONCLUSIONS</b>We got the sequence of novel gene H(3) which might be one of the regenerationjrelated genes. Key words:Gene library; Genes; Nerve regeneration; Spinal cord injuries.</p>