Effect of bone marrow mesenchymal stem cells transplantation on fibrosis in severe chronic hepatic injury induced by diethylnitrosamine☆

BACKGROUND:Many studies have shown that bone marrow mesenchymal stem cel s could improve liver fibrosis. OBJECTIVE:To observe the effect of bone marrow mesenchymal stem cel s on fibrosis in chronic hepatic injury induced by diethylnitrosamine. METHODS:Twenty female Wistar rats were used to establish the model with chronic hepatic injury induced by diethylnitrosamine, and then the models were randomly divided into two groups. Rats in the mesenchymal stem cel s group (n=10) received 1×106/mL male bone marrow mesenchymal stem cel s injection through caudal vein at 4,8,12 and RESULTS AND CONCLUSION:At 20 weeks after chronic hepatic injury, sex-determining region of Y-chromosome was detected in mesenchymal stem cel s group but not in model group. It indicated that bone marrow mesenchymal stem cel s were successful y transplanted in mesenchymal stem cel s group, and survived. MRI showed that a large number of regenerative nodules could be seen in mesenchymal stem cel s group. Comparred with model group, the number of regenerative nodules, fibrosis score,α-smooth muscle actin and percentage of col agen area were increased in mesenchymal stem cel s group (P<0.05). Under our experimental conditions, bone marrow mesenchymal stem cel s in systemic circulation leads to their engraftment into liver tissue and promotes fibrosis in rat model of severe chronic liver injury induced by diethylnitrosamine. 16 weeks, and the rats in the model group received equal volume of saline injection.     

Capacity of bone induction of Compound material of decalcified bone matrix bined with rhBMP—2 and impregnated with bone cement

AIM：To analyze bone inductive capacity of the compound material of decalcified bone matrix combined with rhBMP-2 and impregnated with bone cement.METHODS:To asseas the experimental study,histological and Masson‘‘‘‘‘‘‘‘s methods were used.RESULTS:The effects of compound material on the induction of bone formation were investigated in NIH mouse models.It was observed that in the with rhBMP-2 group,mesenchymal cells gathered in the implated material at the 7th day postoperation,chondrogenesis were found at 14 to 21days after implantation.new bone formation were observed at obout 21 to 28 days after surgery and the DBM particles were absorbed by the new generated tissues gradually.CONCLUSIONS:The compound material of DBM combined with rhBMP-2 and impregnated with bone cement could induce the proliferation and migration of mesenchymal tissues that could be differentiated into cartilage and foumed new bone finally.The new bone could absorb DBM particles gradually.The compound material had fair capacity of bone induction.     

以带蒂筋膜瓣为膜诱导促非细胞型组织工程骨血管化及骨再生修复骨缺损的实验研究

Objective To study the effect of fascial flap with vessels inducing the vascularization of uncel-lular tissue engingeering complex and the regenration of bone on the repair of bone defect, so as to provide the basis for the clinical application. Methods An animal model of bone defect on adult Newzland rabbits'right radial bone was established .and autologous red bone marrow were taken out and mixed into uncellulax tissue engineering comple-xes with OAM which contained BMP. The experiment animals were divided into two groups : experiment group and control group( n = 12 for each ). The control group was only implanted with complexes, meanwhile, the experiment group had fascial flap with vessels. By microsurgery technology,a non-named fascial flap with vessels was prepared, which belonged to capillary net,around the bone defect,and let it wrap tissue engineering complex,fill up bone de-fect. In a certian time, radiograph(X-ray) and light density measure was conducted, gross morphology and histological inspection was exmained. Bone shape measurement analysis and image of vessel analysis were conducted. All the sta-tistics were analyzed by the SPSS 11.5 software. Results Because of mechanically preventing fiber connective tis-sues and surrounding soft tissues from entering the areas of bone defect by fascial flap, it can keep bone defect having a relative stable environment ;The subfascial space itself, and also the shape and mass of filled-in subject had the de-cisive effect on the results of the regeneration of the bone; Owing to the establishment of blood supply during the con-structing tissue engineering complex. The experiment group was obviously superior to the control group. Compared with control group,the absor bance obviously increased in experiment group [(0. 732 ± 0. 021 ) vs (0. 651± 0.018)] (P < 0. 001 ) four weeks after the operation; also the bone trabecular body was significantly increased [(2.32±2.57)% vs(19.37±3.52)% ,(8.37±3.52)% vs(30.24±3.42)% ,(28.57±2.98)% vs(58.76± 4.62)% ,(47.24±3.42)% vs(88.72±5.84)%] ,and capillary area [(5.04±1.62)% vs(17.53±2.86)%, (10.37 ±2.96)% vs(35.24±1. 13)%,(18.20±2. 12)% vs(48.76±4. 62)%,(17.82 ±2. 74)% vs (57.72 ±5.84)%] (P <0.05) at each time period(4 weeks,8 weeks,12 weeks,and 16 weeks after operation). Despite of growth of implant's internal vessel, the number and speed of forming bone trabecula and cartilaginous tis-sue, even developing of mature bone structure, recreating of diaphysis structure, reconstructing of marrow cavity, ab-sorbing and decomposing of implant, the experiment group was obviously superior to the control group. Conclusions The induction of fascial flap with vessels shows double effects, one of which is the vascularization of uncellular tis-sue engineering complex and the other is membrane guided bone regeneration, So the method has a wonderful effect on the repair of bone defect.     

Effect of internal fixation and other methods alleviating low back pain caused by isthmic spondylolisthesis

AIM:To explore the long-term therapeutic effects of surgical treatment for isthmic spondylolisthesis.METHODS:42 cases of isthmic spondylolisthesis were analyzed retrospectively among which 13 cases underwent simple lumbar interlaminar bone implant and 29 cases underwent transpedicular fixation combined with bone implantation.Assessment was made according to JOA standards before and after treatment.RESULTS:At a 3 years of follow-up assessment,the functional outcome in transpedicular fixation assessed by JOA was excellent and good in 79.3% as compared with the group without fixation in which the excellent and good result was 76.9%.The level of pain and functional disability were similar in the two groups,but fusion rate in the group with transpedicular fixation was higher than that in group without it.CONCLUSION:Surgical treatment for isthmic spondylolisthesis imprves function and relieves pain.     

Experiment of non-vascularized iliac bone grafts with the simultaneous placement of titanium implants

AIM:To investigate the osseointegration process of titanium implant and non-vascularized iliac bone grafts.METHODS:12 mongrel were divided into 4 groups randomly.Bone grafts were resected from iliac crest and then transplanted to the other side.Animals were skilled in different time after surgery,X-ray pictures were taken,then histological observation were done.RESULTS:At 3rd week,bone grafts dissolved,resorbed or necrosis partly;At 6th week,new bone began to regenerated;At 9th week,the amount of new bone increased;At 12nd week,bone interface around implant formed,without soft tissue interrupt.CONCLUSION:Osseointegration can formed between non-vascularized iliac bone grafts and titanium implant.     

Experiment of non-vascularized iliac bone grafts with the simultaneous placement of titanium nnplants

AIM: To investigate the osseointegration process of titanium implant and non-vascularized iliac bone grafts. METHODS: 12 mongrel were divided into 4 groups randomly. Bone grafts were resected from iliac crest and then transplanted to the other side. animals were skilled in different time after surgery, X-ray pictures were taken, then histological observation were done. RESULTS: At 3rd week, bone grafts dissolved, resorbed or necrosis partly; At 6th week, new bone began to regenerated; At 9th week, the amount of new bone increased; At 12nd week, bone interface around implant formed, without soft tissue interrupt CONCLUSION: Osseointegration can formed between non-vascularized iliac bone grafts and titanium implant.     

血管化与膜引导在带蒂筋膜瓣促组织工程复合体修复骨缺损中的作用比较

目的 利用组织工程方法结合显微外科技术在动物体内构建兼有血管化与膜引导作用的非细胞型组织工程复合物,通过与单纯采用膜引导性骨再生技术构建的非细胞型组织工程复合物修复动物体内大段骨缺损的对比研究,观察带蒂筋膜瓣包裹法及单纯生物膜包裹构建的组织工程骨对骨缺,损修复的效果,为临床应用提供实验依据.方法 24只5个月龄新西兰大白兔,制备双侧尺骨中段连同骨膜1 cm骨缺损模型,自体红骨髓(ARBM)接种于含骨形态发生蛋白(BMP)的骨诱导活性材料(OAM)制备组织工程骨.将制成的非细胞型组织工程复合物植入骨缺损区,右侧采用单纯可吸收生物膜包裹(生物膜组),左侧采用带血运深筋膜瓣包裹(筋膜瓣组).各组在4、8、12、16周后进行X线检查、吸光度比测量、大体观察和组织学检查、修复区内骨形态计量分析,并在12周行生物力学检测,将数据作统计学处理,用以比较骨缺损修复情况.结果 X线片、大体形态和组织学观察显示,植入物内部血管的长入、骨小梁及软骨组织形成的数量和速度、成熟骨结构的形成、骨干结构的重塑、骨髓腔的再通、植入物的吸收降解,筋膜瓣组均明显优于生物膜组.术后4、8、12、16周的骨小梁面积占修复区面积比值筋膜瓣组为(20.35±2.41)%、(40.21±1.97)%、(66.67±3.44)%、(86.47±3.99)%,生物膜组为(7.46±2.64)%、(20.66±2.28)%、(40.22±1.84)%、(58.18±1.79)%;吸光度值筋膜瓣组为0.636±0.012、0.596±0.062、0.552±0.009、0.451±0.008,生物膜组为0.742±0.032、0.713±0.022、0.655±0.018、0.606±0.015;骨修复交界区单位面积内血管再生面积筋膜瓣组为(18.75 ±2.09)%、(37.41±3.22)%、(53.06±2.18)%、(36.72±4.73)%,生物膜组为(5.34±1.17)%、(9.48±2.%)%、(22.43±2.21)%、(26.27±3.14)%;术后12周生物力学测定筋膜瓣组为26.62±3.96,生物膜组为18.38±0.71,2组比较差异均有统计学意义(P均＜0.05).结论 带血运筋膜瓣具有明显的促组织工程骨血管化作用并通过促血管化而促进成骨.膜引导性骨再生技术应用于大段骨缺损治疗,尽管有效限制了纤维结缔组织长入但也同时限制了有效快速血管化能力,需要漫长的爬行替代过程,单纯应用生物膜可以通过外骨痂生长弥补植入材料爬行替代缓慢的弊端.

Abstract：

Objective The tissue engineering technique and the microsurgery technology is combined to construct the uncellular tissue engineering complex with vascularization and membrane guided dual effect. Through comparing study of using the simple biomembrane guided bone regeneration technique to construct the uncellular tissue engineering complex to repair the large segment bone defect in the animal body,the bone reparative effect of the tissue engineering bone wrapped by pedical fascial flap with vessels and that wrapped by the simple biomembrane was compared, thus to provide experimental evidence for the clinical application. Methods Twenty-four Newzland 5-month-old rabbits were used to build the bilateral periosteumincluded bone defect modelsin the middle piece of the ulna and the length of the defect was 1 cm. Autologous red bone marrow was implanted in the tissue engineering bone which was prepared by osteoinductive absorbing material including BMP. The prepared tissue engineering bone was implanted in the bone defect area. The right side was wrapped by the simple absorbable biomembrane, whereas the left side was wrapped by pedical fascial flap with blood supply. At the fourth, eighth, twelfth and sixteenth week after the operation each group was examined by the radiograph (x-ray), the light density measurement, gross morphology and histological inspection,bone shape measurement analysis in the repairing area and the biomechanics measurement at the twelfth week. The data was analyzed to test the difference of the bond defect repair. Results The radiograph, gross morphology and histological inspection showed the growth of vessels in the implant area, the quantity and the forming speed of the bone trabecula and, the cartilaginous tissue, the formation of the mature bone structure,remodeling of the diaphysis, recanalization of the cavum ossis and the absorption and the degradation of the implant of the group of pedical fascial flap with blood supply was superior to that of the group of the simple absorbable biomembrane. At the fourth, eighth, twelfth and sixteenth week after the operation the bone trabecula area were( 20. 35 ± 2. 41 ) %, ( 40. 21 ± 1.97 ) %, (66. 67 ± 3.44 ) % and ( 86. 47 ± 3.99) % respectively in the group of pedical fascial flap with blood supply, and were ( 7. 46 ± 2.64 ) %, ( 20. 66 ± 2. 28 ) % , ( 40. 22 ±1.84)% and(58. 18 ± 1.79) respectively in the group of the simple absorbable biomembrane. At the same time point after the operation the light density were 0. 636 ± 0. 012,0. 596 ± 0. 062,0. 552 ± 0. 009 and 0. 451 ±0. 008 respectively in the group of pedical fascial flap with blood supply, and 0. 742 ± 0. 032,0. 713 ± 0. 022,0. 655 ±0. 018 and 0. 606 ±0. 015 respectively in the group of the simple absorbable biomembrane. The units of blood vessel reproductive area in the bone repair junctional zone were ( 18.75 ± 2. 09 ) %, ( 37.41 ± 3.22 ) %,(53. 06 ±2. 18)% and (36.72 ±4. 73)% respectively in the group of pedical fascial flap with blood supply,and (5. 34 ± 1.17 ) %, (9. 48 ± 2.96) %, ( 22.43 ± 2. 21 ) % and ( 26. 27 ± 3. 14 ) % respectively in the group of the simple absorbable biomembrane. The biomechanics intension was 26.62 ± 3.96 in the group of pedical fascial flap with blood supply and 18. 38 ±0. 71 in the group of the simple absorbable biomembrane at the twelfth week after the operation. All of the differences were significant( P ＜0. 05 ). Conclusion The pedical fascial flap with blood supply has significant effect in promoting the tissue engineering bone to vascularize and promoting the bone formation by vascularization. The membrane guided bone regeneration technique restricted not only the growth of the fibrous connective tissue in the reparative process of the large segment bone defect effectively, but also the ability of fast and effective vascularization, thus the chronic creep and substitution process would be needed. Simple application of the biomembrane can compensate the shortcoming of chronic creep of the implanted material by the growth of the external callus.     

压力保护支具在老年股骨粗隆间骨折术后康复训练中的应用

目的 观察带有压力传感保护装置(自主研发)的康复训练支具在骨折早期进行康复训练对骨折愈合的效果.方法 选取40例资料完整、符合条件的老年股骨粗隆间骨折行动力髋螺钉内固定术后患者,随机分为实验组和对照组各20例.实验组患者应用带压力传感器保护装置(自2008年5月开始研制带有压力传感保护装置的康复训练支具,2009年1月至2010年6月临床推广应用)的下肢康复训练支具,在术后不同时期,根据患者具体情况,由医师通过计算机调控支具应力阈值,按照预定的个性化康复计划,指导患者借助双拐进行负重行走康复训练.对照组采用传统的康复治疗方法.按照统一的标准评价骨折临床愈合和骨性愈合时间.结果 随访13.0～24.0周,平均17.6周.实验组临床愈合时间7.0～12.0周,平均9.1周;骨性愈合时间12.0～16.0周,平均13.7周.对照组临床愈合时间9.0～13.0周,平均11.3周;骨性愈合时间14.0～20.0周,平均16.6周.2组间骨折临床愈合时间和骨性愈合时间经独立样本t检验,结果显示2组间骨折临床愈合时间和骨性愈合时间差异均有统计学意义(t值分别为5.174、5.846,P均＜0.01).最终2组骨折均愈合,无骨折移位,无内固定物折断、松脱、失效等不良并发症.结论 应用带有压力传感保护装置的康复训练支具,在骨折早期由医师根据患者体重调控间断纵向应力刺激阈值,指导患者进行有效的量化的个性化康复训练,可以达到促进骨折愈合、缩短疗程、减少并发症目的.进一步证明在一定范围内间断的压应力刺激对骨折愈合有促进作用.

Abstract：

Objective To observe the effect of pressure-protective brace with pressure-sensitive device in the early stage rehabilitation training enhance bone healing, shorten the treatment course and reduce complications,a kind of independently developed pressure-protective brace with pressure-sensitive device was utilized with quantified discontinuous longitudinal stress stimulation under doctors' regulation according to procedure. Methods The pressure-protective brace with pressure sensitive device for rehabilitation training was developed in May 2008 ,and was applied in clinics during January 2009 to June 2010. Forty elder patients,with complete clinical data, underwent Dynamic Hip Screw (DHS) internal fixation of femoral intertrochanteric fracture were were enrolled into this study. These cases were assigned into experimental group and control group with 20 patients respectively. The patients of experimental group performed lower extremity rehabilitation training wearing the pressure-protective brace. The load training of lower extremities with double crutches was modulated by doctors through regulating the threshold value of pressure in different time and different condition after operation according to the prearranged rehabilitative plan of individuation. The controls were instructed to performed lower extremity rehabilitation training in traditional way. Both the clinical healing and bone union time in all cases were evaluated according to the uniform standard. Results Total 40 patients were followed up for 13.0 - 24. 0 weeks ( average, 17.6 weeks ). Clinical healing time was 7.0 - 12. 0 weeks ( average,9. 1 weeks ) and bone healing time was 12. 0 - 16.0 weeks(average,13. 7 weeks)in experimental group. While in control group,the clinic healing time and bone union time was 9. 0 - 13.0 weeks( average, 11.3 weeks) and 14. 0 -20. 0 weeks (average, 16. 6 weeks)respectively. The Independent T-test results showed that whether clinic healing time or bone healing time presented significant differences between experimental group and the controls( P＜0. 01 ). All of the fractures in these two groups were healed at the end time of follow up without adverse complications,including fracture displacement, implant break, implant loose and failure. Conclusion The pressure-protective brace with pressure sensitive device used for quantifying rehabilitation training can enhance bone union, shorten the treatment course and reduce complications. This method further proves that discontinuous compressive stress in a certain range can stimulate fracture healing.     

Measurement of tidal respiration in < 34 weeks premature infants with respiratory distress syndrome at 40 weeks corrected gestational age北大核心CSCD

Objective To investigate pulmonary function in terms of tidal respiration and the influencing factors on it in <34 weeks premature infants with RDS at corrected gestational age of 40 weeks. Methods A total of 49 of <34 weeks premature infants with RDS (RDS group) and 36 of <34 weeks premature infants without RDS (non-RDS group) followed throughout entire twelve months were collected from December 2013 to October 2015. Of them, 35 RDS patients and 20 non-RDS patients had the pulmonary function examination. A total of 26 full term infants with hyperbilirubinemia (full term group) were recruited for comparison study. The differences in parameters of tidal respiration were compared among the three groups. The RDS patients were further divided into the mild RDS subgroup and severe RDS subgroup according to the severity of illness. Result (1) The TPEF [(0.17 ± 0.04) s vs. (0.23 ± 0.09) s], VPEF[(6.74 ±2.70) mL vs. (9.33 ±2.92) mL], TPEF/TE [(29.06 ±4.21)% vs. (38.27± 7.16)%], VPEF/VE [(32.54 ±4.43)% vs. (39.64 ±5.88)%] in RDS group were significantly lower than those in full term group (P < 0.05). The TPEF [(0.19 ± 0.06) s vs. (0.23 ± 0.09) s], TPEF/TE [(30.31 ±11.53)% vs. (38.27±7.16)%], VPEF/VE [(34.39 ±8.44)% vs. (39.64 ±5.88)%] in non-RDS group were significantly lower than those in full term group (P <0.05). The TPEF, TPEF/TE, VPEF/VE in RDS group were lower than those in non-RDS group, but the differences were not significant (P>0.05). (2) The TPEF, VPEF, TPEF/TE, VPEF/VE in mild RDS group were higher than those in severe RDS group, but the differences were not significant (P > 0.05). (3) Logistic regression analysis indicated that the gestational age was the protective factor of pulmonary function in premature infants with RDS. Conclusions Small airway resistance in <34 weeks premature infants with RDS is higher than that in full term infants. There was no significant difference in pulmonary function between RDS premature infants and non-RDS premature infants. The gestational age was the influencing factor of pulmonary function in premature infants with RDS.     

酸性成纤维细胞因子复合部分脱蛋白骨修复早期股骨头缺血坏死的组织学改变

背景：以往研究显示,酸性成纤维细胞因子（acidic fibroblast growthfactor,aFGF）复合部分脱蛋白骨（partially,deproteinisedbone,PDPB）对实验动物早期股骨头缺血坏死血．管再生具有良好的促进作用,似其组织学变化尚不明确。目的：从组织学变化角度观察aFGF复合PDPB修复兔早期股骨头缺血坏死的效果。方法：用新西兰大白兔制备早期股骨头缺血坏死动物模型,建模后随机分为空白组、PDPB组和aFGF／PDPB组．PDPB组植入PDPB,aFGF／PDPB组植入aFGF／PDPB,所有动物分别丁第2,4,8周取材进行靠术精伊红染包观察成骨情况结果与结论：空白组第8周缺损区破纤维结缔组织填充,在交界处有少鬣骨样组织形成。PDPB组第4周有少最新骨生成,髓腔肜成,第8周较多植入物吸收,髓腔形成,有很多成骨细胞及髓细胞分布其中。、aFGF／PDPB组各时间点成骨都普遍优于PDPB组,4周组移植物腔填充以骨样组织,可见较多的成骨前体细胞和骨母细胞,可见较多的微血管,骨样组织开始重建。第8周植入物已被新骨取代,髓腔已形成具宵很多骨髓细胞分布其中,骨小粱交界处柯大节成骨细胞,同时仃少量破骨细胞存在可能参与骨塑形,骨陷窝可见成熟骨细胞。组织学检测结果提示．在修复股骨头缺血坏死的效果上,aFGF复合PDPB优于单独应用PDPB。     

酸性成纤维细胞因子/部分脱蛋白骨修复免早期股骨头缺血性坏死的血管化作用

背景:酸性成纤维细胞因子具有较好的促进血管形成作用以及成骨作用,能否有效地促进早期股骨头缺血性坏死动物模型的血管化有待研究.目的:探讨酸性成纤维细胞因子复合部分脱蛋白骨对兔股骨头缺血性坏死修复的血管化作用.设计、时间及地点:随机对照动物实验,于2008-01/2009-01在南华大学生命科学院完成.材料:取健康成年新西兰大白兔肋骨,经脱脂、脱蛋白、部分脱钙和冻干等一系列的物理、化学方法处理后制备部分脱蛋白骨.将酸性成纤维细胞生长因子用无菌蒸馏水稀释后加入部分脱蛋白骨粒,得到复合人工骨.方法:健康成年新西兰大白兔24只,双侧股骨颈交界处开窗,挖除股骨头内约50%松质骨,加用体积分数为95%乙醇灌注30 min,建立双侧股骨头坏死骨缺损模型.按随机数字表法,随机分为空白组,单纯部分脱蛋白骨组,复合人工骨组.分别于相应股骨头骨缺损区植入部分脱蛋白骨、复合人工骨,空白组不植入材料.主要观察指标:分别于术后2,4,8周取材,制备墨汁灌注标本,进行微血管计数以及血管面积分析.结果:2,4,8周时血管计数和血管面积显示,空白组血管数和血管面积最少,单纯部分脱蛋白骨组次之,复合人工骨组最多.复合人工骨组与空白组和单纯部分脱蛋白骨组比较,差异有显著性意义(P＜0.05).结论:酸性成纤维细胞生长因子与部分脱蛋白骨复合构建组织工程化人工骨具有较好的促进血管生成作用,对兔早期股骨头缺血坏死具有较好的修复作用.     

酸性成纤维细胞因子复合部分脱蛋白骨修复兔早期股骨头缺血性坏死的影像学评价

背景：酸性成纤维细胞因子（aFGF）具有较好的促进血管形成的作用以及成骨作用。目的：探讨酸性成纤维细胞因子复合部分脱蛋白骨对兔股骨头缺血性坏死修复的修复作用及X线表现,并与单纯生物衍生骨进行比较。设计、时间及地点：随机对照动物实验,于2008-01~2009-01在南华大学生命科学院完成。材料：健康成年新西兰大白兔24只,双侧股骨头颈交界处开窗,挖除股骨头内约50%松质骨,加用95%酒精灌注30min,建立双侧股骨头坏死骨缺损模型。经脱脂、脱蛋白、部分脱钙和冻干等一系列的物理、化学方法处理后制备生物衍生骨支架材料。酸性成纤维细胞因子复合制备组织工程骨支架材料。方法：按随机数字表法,48髋随机分为A组空白对照组,B组单纯部分脱蛋白骨（PDPB）植入组,C组aFGF/PDPB复合人工骨植入组,并将PDPB、 aFGF/PDPB复合人工骨同期手术植入。主要观察指标：术后分别于2周、4周、8周取材,进行大体标本观察、X线照片。以均值±标准差表示,全部数据采用SPSS13.0 统计软件分析,以α=0.05作为检验标准。结果：A组整个过程都呈低密度影;8周时有2例出现股骨头塌陷,缺损区仍呈X线低密度影。B组2周和4周时植骨区与周围正常清晰可见,8周时1例股骨头X线表现正常,2例缺损区与周围正常骨组织仔细辨别可区分,但已模糊不清。C组4周时移植物与周围正常骨组织界限不清,需仔细辨别才能区分;8周时所有股骨头缺损区与周围正常骨组织融合,与宿主骨界限不清。X线评分结果显示, C组优于A组（p〈0.05）,B组和C组之间有差异C组优于B组,但差异无统计学差异（p〉0.05）。结论：aFGF与PDPB复合构建组织工程化人工骨对兔早期股骨头缺血坏死具有较好的修复作用,但与单纯PDPB组比较X线表现差异无统计学意义。     

酸性成纤维细胞因子复合部分脱蛋白骨修复免早期股骨头缺血性坏死的影像学评价

背景:前期研究表明,酸性成纤维细胞因子复合部分脱蛋白骨具有很好的促进早期股骨头缺血坏死动物模型血管化的作用,而X射线也是评价骨愈合很重要的指标.目的:应用X射线评估酸性成纤维细胞因子复合部分脱蛋白骨对兔股骨头缺血性坏死的修复作用,并与单纯生物衍生骨进行比较.设计、时间及地点:随机对照动物实验,于2008-01/2009-01在南华大学生命科学院完成.材料:取健康成年新西兰大白兔肋骨,经脱脂、脱蛋白、部分脱钙和冻干等一系列的物理、化学方法处理后制备部分脱蛋白骨.将酸性成纤维细胞生长因子用无菌蒸馏水稀释后加入部分脱蛋白骨粒,得到复合人工骨.方法:健康成年新西兰大白兔24只,双侧股骨头颈交界处开窗,挖除股骨头内约50%松质骨,加用体积分数为95%乙醇灌注30 min,建立双侧股骨头坏死骨缺损模型.按随机数字表法,随机分为空白组,单纯部分脱蛋白骨组,复合人工骨组,并将部分脱蛋白骨、复合人工骨同期手术植入.主要观察指标:分别于术后2,4,8周取材,进行X射线照片观察.结果:空白组整个过程都呈低密度影:8周时缺损区仍呈X射线低密度影,有2只出现股骨头塌陷.单纯部分脱蛋白骨组2周和4周时植骨区与周围正常骨组织清晰可见,8周时1只股骨头X射线表现正常,2只缺损区与周围正常骨组织仔细辨别可区分,但已模糊不清.复合人工骨组4周时移植物与周围正常骨组织界限不清,需仔细辨别才能区分;8周时所有股骨头缺损区与周围正常骨组织融合,与宿主骨界限不清.X射线评分结果显示,复合人工骨组优于空白组(P<0.05),单纯部分脱蛋白骨组和复合人工骨组之间差异无显著性意义(P>0.05).结论:X射线显示酸性成纤维细胞生长因子与部分脱蛋白骨复合构建组织工程化人工骨对兔早期股骨头缺血坏死具有较好的修复作用,与单纯部分脱蛋白骨表现相似.     

碱性成纤维细胞生长因子和部分脱蛋白骨对兔股骨头缺损再血管化的影响

背景股骨头缺血坏死的治疗是骨科领域的一大难题.然而,近来的研究表明碱性成纤维细胞生长因子是一有效的血管生成因子,推测其在股骨头缺血坏死的治疗方面可能具有一定潜能.目的模拟临床上治疗股骨头坏死的开窗法的手术过程制备兔股骨头缺损,并植入碱性成纤维细胞生长因子和部分脱蛋白骨,以探讨碱性成纤维细胞生长因子对股骨头缺损的再血管化作用.设计随机对照实验.单位昆明医学院动物实验中心.材料实验于2002-07/2003-07在昆明医学院动物实验中心完成.成年雄性健康新西兰白兔27只,体质量2.2～2.8 kg.随机分为碱性成纤维细胞生长因子/部分脱蛋白骨复合骨组,单纯部分脱蛋白骨组,空白对照组,每组9只.方法①制备碱性成纤维细胞生长因子/部分脱蛋白骨复合骨含碱性成纤维细胞生长因子10 ng/mm3载体.②股骨头缺损模型的建立及修复取兔27只,在股骨头颈交界处开窗,建立骨缺损模型.复合骨组植入碱性成纤维细胞生长因子/部分脱蛋白骨;部分脱蛋白骨组植入单纯部分脱蛋白骨;空白对照组不植入任何植入物.实验动物分别于术后2,4,8周各时相点麻醉状态下进行墨汁灌注并处死,取材.主要观察指标①兔股骨头标本组织学检查及血管计数.②微血管面积图像分析.结果27只兔均进入结果分析.①兔股骨头标本组织学检查及血管计数术后8周,复合骨组移植材料被骨组织所取代,骨髓腔形成,其中有丰富的髓内血管存在;脱蛋白骨组移植材料亦被骨样组织包裹,且大部分部分吸收;空白对照组股骨头的缺损区被纤维组织填充,在缺损区周边的结缔组织中可见新生骨样组织和散在软骨细胞岛,血管数量较少.2周微血管计数复合骨组均显著高于部分脱蛋白骨组和空白对照组[(31.833±7.914)比(22.917±2.079)和(11.250±4.220)(血管数量/视野),P＜0.01,P＜0.05];4周和8周微血管计数复合骨组和脱蛋白骨组均显著高于空白对照组.②微血管面积图像分析20μm厚的透明标本光镜下观察见术后2,4,8周,复合骨组修复区血管丰富并吻合成网,部分脱蛋白骨组血管丰富吻合成网,空白组血管散在.结论碱性成纤维细胞生长因子具有促进股骨头缺损的再血管化作用,其在治疗股骨头坏死方面具备一定的潜能和优势.     

人引导骨再生修复颌骨缺损的组织学观察

背景：引导骨再生对于成骨的引导及成形效果在基础研究及动物实验中已得到充分肯定,但国内有关人的颌骨骨缺损后引导骨再生中新生骨的组织学观察是一个空白。目的：应用组织学检查了解人引导骨再生修复颌骨骨缺损的成骨效果。方法：选取引导骨再生治疗颌骨骨缺损患者19例24个部位,于治疗后6个月行种植术中,中空钻取出术区新生骨,组织学观察,评价成骨效果。结果与结论：所取新生骨可见不同发育阶段的骨形成。近根尖段骨中主要为板层骨,而冠方新生骨主要为纤维性骨形成,内含类骨组织及软骨性骨,极少板层骨。提示人颌骨骨缺损经引导骨再生后6个月成骨效果肯定,但远期效果还有待进一步观察。     

动脉灌注酸性成纤维细胞生长因子治疗兔股骨头缺血性坏死模型

目的 探讨动脉灌注酸性成纤维细胞生长因子(aFGF)治疗兔股骨头缺血性坏死模型的价值。方法 以液氮冷冻法建立兔股骨头缺血性坏死模型30只,建模后4周分为3组行DSA引导下动脉灌注。实验组12只,动脉灌注aFGF;药物对照组12只,动脉灌注尿激酶、丹参、罂粟碱;假手术对照组6只,动脉灌注生理盐水。动脉灌注后4周,对3组行股骨头区造影及骨密度检测后,处死实验兔行组织学检查,记录空骨陷窝阳性数。另对实验组于动脉灌注前及灌注后4周处死前检测肿瘤标志物。结果 造影示实验组股骨头区血管及侧支循环明显多于药物对照组及假手术对照。骨密度检测示实验组骨密度(0.65±0.03)明显高于药物对照组(0.55±0.03)及假手术对照组(0.44±0.04,P均<0.05)。动脉灌注前及灌注后,实验组各肿瘤标志物检测均为阴性。组织学检查示实验组空骨陷窝阳性数(13.92±1.67)明显低于药物对照组(18.50±1.45)及假手术对照组(23.17±1.94,P均<0.05)。结论 动脉灌注aFGF可促进股骨头区侧支循环建立,加速液氮冷冻兔股骨头坏死模型的修复,较动脉灌注常规药物作用更为明显。     

激素性兔股骨头坏死模型的建立

背景：激素的应用已经成为激素性股骨头缺血坏死发病的首要原因。目的：拟应用马血清与皮质醇激素联合制备兔股骨头缺血性坏死早期模型,探讨激素性股骨头坏死的发病机制。方法：新西兰大白兔随机分成3组。激素联合马血清组静脉注射马血清10mL/kg,3周后再次注射马血清6mL/kg,再2周后注射甲强龙45mg/kg,1次/d,连续5d。激素组注射甲强龙45mg/kg,1次/d,连续5d。正常对照组不做任何处理。于激素给予前及激素注射后1,3,7和14d检测定血胆固醇、三酰甘油水平;于激素注射后第2、4、8周行股骨头MRI和组织病理学检测。结果与结论：与对照组比较,激素联合马血清组和激素组大白兔血清三酰甘油和总胆固醇分别于激素注射后1d和3d明显高于对照组（P〈0.01）。MRI检测结果显示,激素联合马血清组大白兔股骨头于激素注射后第4周出现坏死信号;激素组第8周出现坏死信号。组织学检测结果显示,激素联合马血清组大白兔于激素注射第4周时股骨头出现骨小梁部分变细、断裂,空骨陷窝增加;第8周骨小梁稀疏、破碎,脂肪细胞增大,空骨陷窝明显增大。激素组病理坏死程度各时段均较激素联合马血清组轻。结果表明,激素联合马血清方法可成功制备股骨头坏死早期模型。     

VX2骨肿瘤模型的超声造影和磁共振初步观察

目的观察实验兔VX2恶性骨肿瘤模型的超声造影、MRI表现和病理变化，为高强度聚焦超声（HIFU）治疗恶性骨肿瘤影像学随访提供实验模型。方法将VX2肿瘤组织块接种于10只新西兰大白兔胫骨上端干骺端骨髓腔内，3周后进行超声和MRI检查，并进行病理检查。结果10只模型全部接种成功，超声表现为局部骨组织回声消失，胫骨骨皮质破坏，肿瘤内部回声不均匀，彩色多普勒血流成像和彩色多普勒能量图显示肿瘤内彩色血流丰富。注人超声造影剂Sono Vue后，肿瘤明显强化，血流灌注方式呈“快进快退”。磁共振平扫T1WI呈等信号，T2WI呈不均匀高信号，增强后明显强化。病理检查镜下见大片肿瘤细胞。结论兔VX2恶性骨肿瘤模型的建立，可为HIFU治疗恶性骨肿瘤提供较为理想的实验模型，并且为治疗前后的影像学评估提供实验依据。     

激素性兔股骨头坏死模型的建立(英文)

背景:激素的应用已经成为激素性股骨头缺血坏死发病的首要原因。目的:拟应用马血清与皮质醇激素联合制备兔股骨头缺血性坏死早期模型,探讨激素性股骨头坏死的发病机制。方法:新西兰大白兔随机分成3组。激素联合马血清组静脉注射马血清10mL/kg,3周后再次注射马血清6mL/kg,再2周后注射甲强龙45mg/kg,1次/d,连续5d。激素组注射甲强龙45mg/kg,1次/d,连续5d。正常对照组不做任何处理。于激素给予前及激素注射后1,3,7和14d检测定血胆固醇、三酰甘油水平;于激素注射后第2、4、8周行股骨头MRI和组织病理学检测。结果与结论:与对照组比较,激素联合马血清组和激素组大白兔血清三酰甘油和总胆固醇分别于激素注射后1d和3d明显高于对照组(P<0.01)。MRI检测结果显示,激素联合马血清组大白兔股骨头于激素注射后第4周出现坏死信号;激素组第8周出现坏死信号。组织学检测结果显示,激素联合马血清组大白兔于激素注射第4周时股骨头出现骨小梁部分变细、断裂,空骨陷窝增加;第8周骨小梁稀疏、破碎,脂肪细胞增大,空骨陷窝明显增大。激素组病理坏死程度各时段均较激素联合马血清组轻。结果表明,激素联合马血清方法可成功制备股骨头坏死早期模型。