Circulating microRNA signature of steroid‐induced osteonecrosis of the femoral head

Objectives

Steroid‐induced osteonecrosis of the femoral head (ONFH) is a common orthopaedic disease of which early detection remains clinically challenging. Accumulating evidences indicated that circulating microRNAs (miRNAs) plays vital roles in the development of several bone diseases. However, the association between circulating miRNAs and steroid‐induced ONFH remains elusive.

Materials and methods

miRNA microarray was performed to identify the differentially abundant miRNAs in the serums of systemic lupus erythematosus (SLE) patients with steroid‐induced ONFH as compared with SLE control and healthy control group. We predicted the potential functions of these differentially abundant miRNAs using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses and reconstructed the regulatory networks of miRNA‐mRNA interactions.

Results

Our data indicated that there were 11 differentially abundant miRNAs (2 upregulated and 9 downregulated) between SLE‐ONFH group and healthy control group and 42 differentially abundant miRNAs (14 upregulated and 28 downregulated) between SLE‐ONFH group and SLE control group. We also predicted the potential functions of these differentially abundant miRNAs using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses and reconstructed the regulatory networks of miRNA‐mRNA interactions.

Conclusions

These findings corroborated the idea that circulating miRNAs play significant roles in the development of ONFH and may serve as diagnostic markers and therapeutic targets.     

A molecular phylogenetic and phylogeographic study of two forms of Calliptamus barbarus (Costa 1836) (Orthoptera: Acrididae,Calliptaminae) from two regions of Algeria

Calliptamus barbarus (Orthoptera: Acrididae) is the most polymorphic species within the genus Calliptamus. It shows a morphological polymorphism (three hind femoral spots, or only one hind femoral spot). Several studies have been made in order to distinguish the two forms: morphometry, number of ovarioles, sound production, protein and enzyme system. The aim of our work is to assess whether the two forms can be considered as different taxa and to perform a molecular phylogenetic study of two populations of C. barbarus collected from two different Algerian localities. No clear genetic differentiation was found between the samples with different morphologies. Additionally, the samples from Algeria do not form a monophyletic sister clade compared to the one formed by the sequences from GenBank from other geographical regions. Despite the morphological differences shown between the two populations, our molecular study indicates that there are no differences at a molecular level using the two mitochondrial genes COI and 16S.     

Biomechanical assessment and clinical analysis of different intramedullary nailing systems for oblique fractures

The aim of this study is to evaluate the fracture union or non-union for a specific patient that presented oblique fractures in tibia and fibula, using a mechanistic-based bone healing model. Normally, this kind of fractures can be treated through an intramedullary nail using two possible configurations that depends on the mechanical stabilisation: static and dynamic. Both cases are simulated under different fracture geometries in order to understand the effect of the mechanical stabilisation on the fracture healing outcome. The results of both simulations are in good agreement with previous clinical experience. From the results, it is demonstrated that the dynamization of the fracture improves healing in comparison with a static or rigid fixation of the fracture. This work shows the versatility and potential of a mechanistic-based bone healing model to predict the final outcome (union, non-union, delayed union) of realistic 3D fractures where even more than one bone is involved.     

微创经皮钢板接骨术与Henry入路钢板内固定治疗桡骨远端骨折的疗效观察

目的:研究微创经皮钢板接骨术与Henry入路钢板内固定治疗桡骨远端骨折的疗效。方法:选取2013年2月到2014年2月我院收治的桡骨远端骨折患者86例,按照随机数字表法将患者分为Ⅰ组和Ⅱ组,每组43例,Ⅰ组患者给予微创经皮钢板接骨术治疗,Ⅱ组患者给予Henry入路钢板内固定治疗,术后随访患者1年,比较两组临床疗效。结果:Ⅰ组手术时间、术中出血量显著优于Ⅱ组,两组比较差异具有统计学意义(P0.05);Ⅰ组术后1年DASH评分显著优于Ⅱ组,两组比较差异具有统计学意义(P0.05);两组并发症比较无统计学意义(P0.05)。结论:微创经皮钢板接骨术治疗桡骨远端骨折具有较好的临床疗效,能缩短手术时间、降低术中出血量,改善患者上肢功能。     

胫骨螺旋形骨折合并后踝骨折与单纯踝关节骨折的区别

目的:比较后踝骨折两种不同类型的临床区别,为后踝骨折的临床诊治提供借鉴参考依据。方法:选取2010年1月-2013年1月我院收治的成人胫腓骨骨干骨折和单纯踝关节骨折患者3578例为研究对象,对两种骨折患者的后踝骨折发生率、后踝骨折合并外踝骨折的发生率等进行比较分析。结果:(1)TAF患者的后踝骨折发生率高于单纯踝关节骨折患者的后踝骨折发生率,差异具有统计学意义(P0.05);(2)TSPMF患者的外踝骨折发生率低于单纯后踝关节骨折的外踝骨折发生率,差异具有统计学意义(P0.05)。结论:胫骨螺旋形骨折与单纯踝关节骨折存在一定程度的差异,临床实践中应针对两种骨折的临床特点实施有针对性的治疗方案。     

不同治疗方式在老年股骨粗隆间骨折中的对照分析

目的:比较分析不同治疗方式对老年股骨粗隆间骨折的治疗效果。方法:回顾性分析152例老年股骨粗隆间骨折患者的临床资料,保守治疗组24例;手术治疗组128例,其中人工股骨头置换23例、外固定架23例、髓内固定28例(包括股骨近端髓内钉(proximal femoral nail,PFN)、Gamma钉等)、动力髋螺钉(dynamic hip screw,DHS)26例、股骨近端锁定钢板(the locking compress plate,LCP)28例。对各种治疗方式的相关指标进行比较分析。结果:手术治疗组患者卧床时间和并发症发生率均显著优于保守治疗组(t=8.045,7.583,8.673,8.023,8.672,X2=9.124,4.809,6.603,4.276,14.444,P0.05);各手术组之间比较:各组卧床时间无显著差异(F=0.241,P0.05),外固定架组和LCP组手术时间、切口长度、出血量及术后引流量均显著优于其余各组(P0.05);保守组术后Harries评分低于手术组。结论:手术治疗老年股骨粗隆间骨折可获得满意疗效,且并发症较少;外固定架创伤较小,LCP和人工股骨头置换术后疗效较好,其中LCP可作为优先考虑方案。     

肱骨近端锁定接骨板结合抗骨质疏松药物治疗老年骨质疏松性肱骨近端粉碎性骨折的疗效观察

目的:探讨肱骨近端锁定接骨板(LPHP)结合抗骨质疏松药物治疗老年骨质疏松性肱骨近端粉碎性骨折(OP-CFPH)的疗效价值。方法:抽选我院2012年1月-2014年2月收治的45例老年OP-CFPH患者,采用随机分层法分为对照组(n=22例,采用三叶形普通钢板治疗)和观察组(n=23例,采用LPHP+入院后抗骨质疏松治疗),比较两组手术参数、术后肩关节Neer评分及并发症发生率的差异。结果:观察组手术时间、术中出血量、术后引流量及术后骨折愈合时间均显著低于对照组的,组间差异具有统计学意义(P0.05);观察组术后肩关节Neer评分优良率明显高于对照组(P0.05);术后观察组并发症发生率低于对照组,但比较差异无统计学意义(P0.05)。结论:LPHP联合抗骨质疏松治疗老年OP-PHF具有创伤小、疗效好的优点,有利于骨折愈合,是目前治疗该类骨折一种理想的方法。     

创伤性椎体骨折行椎体成形术后复发的危险因素评估

目的：对创伤性椎体骨折患者使用椎体成形术治疗后可能再次引起骨折的多个因素进行评估。方法：选取本院收治的经皮椎 体成形术（Percutaneous vertebroplasty,PVP）或经皮椎体后凸成形术（Percutaneous kyphoplasty,PKP）治疗的患者161 例,其中再次 发生骨折的患者113 例（131 椎）,根据治疗方法（PVP 或PKP）和再次发生骨折的部位（手术椎体或非手术椎体）不同,将患者分成 A1 和A2（再发骨折部位是手术椎体）、B1 和B2（骨折部位为非手术椎体）、C1 和C2（手术椎体和非手术椎体）以及D 组（未再次 发生骨折）共七组,A1,B1,C1 三组使用PVP,A2,B2,C2三组使用PKP,记录各组患者可能导致再发骨折风险的因素并和D组比 较,分析PVP或PKP治疗后椎体再次发生骨折的高危因素。结果：患者身高、体重、年龄等一系列因素之间的差异没有统计学意 义（P>0.05）;而骨水泥注入的体积在再发骨折患者和D 组之间差异有统计学意义（P<0.05）;椎间盘骨水泥是否渗透和是否使用抗 骨质疏松药物治疗的差异有统计学意义（P<0.05）;再发骨折患者和D 组患者25-(OH)D 的浓度之间的差异有统计学意义（P<0. 05）。多因素Logistic 分析显示,椎间盘水泥渗透、低浓度的25-(OH)D 和未使用抗骨质疏松药物治疗是椎体成形术治疗后复发骨 折的危险因素（P<0.05）。结论：PVP或PKP治疗后椎体再次发生骨折的三个危险因素是椎间盘骨水泥渗透、较低的25-(OH)D 浓 度和未使用抗骨质疏松药物治疗。