OBJECTIVE: From the point of view of material science, the methods of tissue repair and defect reconstruct were discussed, including mesenchymal stem cells (MSCs), growth factors, gene therapy and tissue engineered tissue. METHODS: The advances in tissue engineering technologies were introduced based on the recent literature. RESULTS: Tissue engineering should solve the design and preparation of molecular scaffold, tissue vascularization and dynamic culture of cell on the scaffolds in vitro. CONCLUSION: Biomaterials play an important role in the tissue engineering. They can be used as the matrices of MSCs, the delivery carrier of growth factor, the culture scaffold of cell in bioreactors and delivery carrier of gene encoding growth factors.
目的 总结术后早期炎性肠梗阻的临床特点及诊治经验。方法 回顾性分析我院2004年1月至2010年12月期间收治的22例腹部手术后早期炎性肠梗阻患者的临床资料。结果 全组均行保守治疗，均治愈出院。肠梗阻解除时间平均6.5d。2例出院后再次出现慢性肠梗阻，经保守治疗好转。结论 术后早期炎性肠梗阻在腹腔严重感染性疾病术后多见，治疗以保守治疗为主，同时应动态观察腹部症状、体征变化，严防误诊、误治。
Objective To study the vascularization of the compositeof bone morphogenetic protein 2 (BMP-2) gene transfected marrow mesenchymal stem cells (MSCs) and biodegradable scaffolds in repairing bone defect. Methods Adenovirus vector carrying BMP-2 (Ad-BMP-2) gene transfected MSCs and gene modified tissue engineered bone was constructed. The 1.5 cm radial defect models were made on 60 rabbits, which were evenly divided into 4 groups randomly(n=15, 30 sides). Different materials were used in 4 groups: Ad-BMP-2 transfected MSCs plus PLA/PCL (group A), AdLacz transfected MSCs plus PLA/PCL (group B), MSCs plus PLA/PCL (group C) and only PLA/PCL scaffolds (group D). The X-ray, capillary vessel ink infusion, histology, TEM, VEGF expression and microvacular density counting(MVD) were made 4, 8, and 12 weeks after operation. Results In group A after 4 weeks, foliated formed bones image was observed in the transplanted bones, new vessels grew into the bones, the pores of scaffolds were filled with cartilage callus, osteoblasts with active function grew around the microvessels, and VEGF expression and the number of microvessels were significantly superior to those of other groups, showing statistically significant difference (Plt;0.01); after 8 weeks, increasingly more new bones grew in the transplanted bones, microvessels distended and connected with each other, cartilage callus changed into trabecular bones; after 12 weeks, lamellar bone became successive, marrow cavity recanalized, microvessels showed orderly longitudinal arrangement. In groups B and C, the capability of bone formation was weak, the regeneration of blood vessels was slow, after 12 weeks, defects were mostly repaired, microvessels grew among the new trabecular bones. In group D, few new vessels were observed at each time, after 12 weeks, broken ends became hardened, the defectedarea was filled with fibrous tissue. Conclusion BMP-2 gene therapy, by -upregulating VEGF expression, indirectly induces vascularization ofgrafts,promotes the living of seed cells, and thus accelerates new bone formation.
Objective To explore the methods of evidence-based individualized treatment for a patient with oral pemphigus. Methods According to chnical problems, we searched The Coehrane Library （Issue 1,2005 ） , MEDLINE （1966 -Jan. 2005 ）, SUMSEAR.CH （Jan. 2005 ）, TRIPDATABASE （1997 - 2005 ）, CMCC （1994 - 2004 ）and handsearched four Chinease journals （starting pubhcation -2004）. Results No Systematic review was found. Six randomised controlled trials, two reviews of high quality and one guidehne were identified. We found that corticosteroid was the firsthne medicine in the treatment of pemphigus. However, corticosteroid at higher dose did not work more effectively than that at lower dose. Corticosteroid at middle-dose was preferred in treating oral pemphigus. Additionally, corticosteroid combined with immunosuppressants led to lower mortality. Among them, cyclophosphamide and azathioprine were recommended, and methopterin should be avoided. Plasma exchange in combination with corticosteroid at lowor middle-dose should not be recommended in conventional therapy. Chinese traditional treatment combined with Western medicine might work. A treatment with prednisone at the dose of 60 mg/d and in combination with azathioprine 100mg/d was made based on the evaluation of the data available and was proved optimal by 6 months following-up. Conclusions The therapeutic effect of pemphigus has been improved by evidence-based treatment.
PURPOSE:To evaluate the therapeutic effect of argon laser photocoagulation on choroidal osteoma. METHODS:Six cases (7 eyes)of choroidal osleoma were treated with argon laser photoeoagulation. The pre and postoperative visual aeuity,fundus appearance and fundus fluorescein anglography(FFA)were observed. The average period of follow up was 23 months. RESULT:The visual acuity of all patients was unchanged. Choroidal osteomas in 3 patlents ( 3 eyes)were flattened. The EFA showed that choroidal vaseulature disappeared in one eye. CONCLUSION :Multiple sessions of photocoagulation may cause decalcification of choroidal ostema and ]imitation of growth of the tumors awing to destroying the choroid blood vessel by pholoeoagulation in the area of tumor and around it. （Chin J Ocul Fundus Dis,1997,13: 204-206）
The Influence of microwave and hot water immersion hyperthermia on the lymphedematous skin of lower extremity on 12 patients was studied by using immunohistochemical and lymphoscintigraphic methods. We assumed that the subsidence of inflammatory changes in the lymphedematous limb and/or local absorption of tissue fluid protein following local microwave heating, but not the augmented lymph How seemed to be responsible for the reduction of edema.