大鼠髁突软骨细胞发育中相关信号通路的初步筛查

目的:通过建立的大鼠髁突软骨细胞发育过程中蛋白表达差异谱,分析可能参与的信号通路,为进一步认识髁突软骨生理性及病理性生长改建的信号调控机制提供相关信息。方法:收获出生后1、7、14、28 d共4组SD大鼠髁突软骨细胞,甲苯胺蓝染色、Ⅱ型胶原免疫组化染色鉴定软骨细胞。提取各组软骨细胞总蛋白,采用i TRAQ标记定量蛋白,2D nano-HPLC和基质辅助激光解吸/电离串联飞行时间质谱(MALDI-TOF-TOF),获取出生后大鼠髁突软骨细胞发育过程中差异蛋白的表达谱,所得数据用MASCOT软件处理,筛选样本之间有意义的差异蛋白,运用GO法及David软件进行KEGG信号通路分析。结果 :共鉴定137种具有可信度表达的蛋白,有44种蛋白参与至少27条KEGG信号通路,其中ECM-受体相互作用、焦点粘连、actin骨架调节、Ca2+信号通路、血管平滑肌收缩、Gn RH信号通路、肌醇三磷酸代谢、磷脂酰肌醇信号系统以及核糖体等信号通路具有统计学意义。结论:在大鼠髁突软骨发育中,各信号通路蛋白在时间、空间上差异性表达,共同形成复杂的信号传递网络。     

早期骨性关节炎客观诊断方法的评价

骨性关节炎(Osteoarthritis,OA)是一种以关节软骨破坏,软骨下骨和滑膜反应为特征的慢性进行性骨性关节疾病.关节软骨的稳定而复杂的耐压框架结构在破坏后,自身的修复能力很弱.因此,早期诊断成为治疗骨性关节炎的重点,本文就相关客观诊断方法在诊断OA中的特点作一综述.     

细胞因子在骨关节炎软骨退变中的作用

骨关节炎(Osteoarthritis,OA)是一种以关节软骨破坏,软骨下骨和滑膜反应为特征的慢性进行性骨关节疾病。近年报道细胞因子作为调节者,通过各种机制调节软骨细胞的功能活动,在关节软骨退变中起到了重要的作用,本文就相关因子作一综述。     

Tendon-to-bone healing using an injectable calcium phosphate cement combined with bone xenograft/BMP composite

Injectable calcium phosphate cement (ICPC) has been applied to enhance the tendon-to-bone healing. However, its slow degradation delays the osteointegration of grafted tendon in bone tunnels. We therefore constructed a synthetic biomaterial of ICPC combined with recombined bone xenograft granules (RBX). In this study, the first stage study demonstrated that the ICPCB contained 3 mg BMPs (ICPCB-3) obtained a porous structure. More importantly, the values of ICPCB-3 were highest in cell proliferation, alkaline phosphatase (ALP) activity, expression of osteogenic genes, and newly ectopic bone-forming area (P < 0.05). Then, ICPCB-3 was used in an anterior cruciate ligament (ACL) reconstruction model. Ninety skeletal mature rabbits underwent bilateral ACL reconstructions and were assigned to 3 groups: control group, ICPC alone group, and ICPCB-3 group. Animals were sacrificed at 6, 12 and 24 weeks. The results showed compared with ICPC, ICPCB-3 composite markedly accelerated tendon-to-bone healing. In addition, little remnants were observed in ICPCB-3 group. Moreover, the maximum loads to failure of ICPCB-3 group was significantly higher than ICPC group at 24 weeks (P < 0.01). We conclude that the ICPCB composite, with a porous structure and better osteointegration effect, has direct clinical instruction to arthroscopic techniques of the ACL reconstruction.     

Anterior cruciate ligament regeneration using mesenchymal stem cells and silk scaffold in large animal model

Although in vivo studies in small animal model show the ligament regeneration by implanting mesenchymal stem cells (MSCs) and silk scaffold, large animal studies are still needed to evaluate the silk scaffold before starting a clinical trial. The aim of this study is to regenerate anterior cruciate ligament (ACL) in pig model. The micro-porous silk mesh was fabricated by incorporating silk sponges into knitted silk mesh with lyophilization. Then the scaffold was prepared by rolling the micro-porous silk mesh around a braided silk cord to produce a tightly wound shaft. In vitro study indicated that MSCs proliferated profusely on scaffold and differentiated into fibroblast-like cells by expressing collagen I, collagen III and tenascin-C genes in mRNA level. Then the MSCs-seeded scaffold was implanted in pig model to regenerate ACL. At 24 weeks postoperatively, the MSCs in regenerated ligament exhibited fibroblast morphology. The key ligament-specific extracellular matrix components were produced prominently and indirect ligament–bone insertion with three zones (bone, Sharpey's fibers and ligament) was observed. Although there was remarkable scaffold degradation, the maximum tensile load of regenerated ligament could be maintained after 24 weeks of implantation. In conclusion, the results imply that silk-based material has great potentials for clinical applications.     

手术与非手术治疗腰椎间盘突出症远期疗效的比较评价

[目的]评价腰椎间盘突出症患者手术治疗与非手术治疗的远期疗效.[方法]对2000年1月～2002年12月在本院住院治疗的377例腰椎间盘突出症患者进行随访,分析患者手术和非手术治疗前后VAS、ODI的改善情况,同时比较手术和非手术治疗后SF - 36生活量表的变化.[结果]共获得有效随访99人,随访率为26.3％.下腰痛VAS评分,手术组(52例)术前:5.84,末次随访:1.78.非手术组(47例)治疗前:6.03,末次随访:2.17,两组治疗前后下腰痛VAS评分有显著差异,但两组疗效间没有显著差异.下肢放射痛VAS评分,手术组(52例)术前:7.45,末次随访:1.52;非手术组(47例)治疗前:5.72,末次随访:2.21,两组治疗前后下肢痛VAS评分有显著差异,两组疗效间有显著差异.Oswestry伤残指数(ODI),手术组(52例)术前:68.18％,末次随访:13.44％;非手术组(47例)治疗前:60.98％,末次随访:17.04％,两组治疗前后ODI有显著差异,两组间没有显著差异.SF - 36生存质量调查问卷评分结果显示,治疗后手术组与非手术组相比患者在躯体健康(PF)、躯体角色功能(RP)、躯体疼痛(BP)、生命活力(VT)、情绪角色功能(RE)等5个维度上没有显著性差异(P＞0.05);总体健康(GH)、心理健康(MH)和社会功能(SF)手术组较非手术组有显著性差异(P＜0.05).[结论]本组随访资料显示腰椎间盘突出症手术组和非手术治疗组均有较好的远期疗效.手术治疗能更好地缓解腰椎间盘突出症患者的下肢放射痛,对恢复患者的总体健康、心理健康和社会功能也有积极作用.     

Highly flexible and rapidly degradable papaverine-loaded electrospun fibrous membranes for preventing vasospasm and repairing vascular tissue

Vasospasm is a common post-operative complication after vascular anastomosis. Currently, the main treatment is a local injection of antispasmodic drugs. However, this method has a high rate of relapse and is subject to a large degree of individual variation, and repeated injections cause additional pain for patients. In this study, we developed highly flexible and rapidly degradable papaverine-loaded electrospun fibrous membranes to be wrapped around vascular suturing to prevent vasospasm. Poly-l-lactic acid/polyethylene glycol (PLLA/PEG) electrospun fibers containing papaverine maintained a high degree of flexibility and could withstand any folding, and are therefore suitable for wrapping vascular suturing. A rapid release of papaverine, between 2 and 7 days, was achieved by adjusting the proportions of PEG and PLLA. PLLA electrospun fibers containing 40% PEG (PLLA-40%) could control drug release and polymer degradation most effectively during the first 2 weeks post-operation. Testing using an in vivo rabbit model showed that PLLA-40% fibrous membranes produced significant antispasmodic effect without observable inflammation or hyperplasia, and the fibrous membranes were ideally biodegradable, with no impact on regional blood flow, pressure, vessel diameter or surrounding tissue hyperplasia. Therefore, papaverine-loaded electrospun fibrous membranes show the potential to greatly reduce post-operative vasospasm and maintain regular vascular morphology during antispasmodic therapy.     

小鼠激素性股骨头坏死的组织学演变

目的通过激素性股骨头坏死小鼠模型，了解其组织学变化过程及其规律。方法选用2个月龄FVB小鼠，分为6组，每组5只，A、B、C、D组行甲基强的松龙每日21mg／kg体重皮下注射，分别持续1、2、3、4周，在处死前10和3d以30mg／kg体重腹腔注射盐酸四环素，E组为对照组；F组母鼠行双侧卵巢切除。股骨头行苏木素-伊红（HE）染色、甲苯胺蓝染色、四环素标记、TUNEL和Micro-CT。结果4周时股骨头软骨下骨板和骨小梁出现坏死和空的骨陷窝；有跨越骨骺的骨桥形成；部分骨小梁见双荧光标记带，其中大量骨细胞和成骨细胞TUNEL阳性。Micro-CT发现1～3周骨量逐步下降，股骨头三维重建可见桔皮样改变。结论FVB小鼠作为激素性股骨头坏死的早期病理过程的动物模型有其一定应用价值。