足趾移植长手指全形再造术的临床应用

目的探讨足趾移植长手指全形再造手术的临床疗效。方法自2015年6月至2019年6月,对16例因外伤致手指缺损患者采用足趾移植长手指全形再造术,术后评估供区及受区的感觉功能、运动功能及外观形态,分析指甲畸形及增生性瘢痕的发生情况,并记录术后发生感染、血肿、皮片坏死及供区愈合不良等情况;通过调查问卷的方式分析患者的满意度。结果所有患者术后获随访1~12个月,其中2例受区发生感染,1例受区皮片边缘发生坏死,经换药后予以缓解;其余患者的供、受区均未出现长时间的痛疼感觉,受区感觉功能恢复达87.50%,受区运动功能恢复均较满意,手指外形基本满意。供区感觉受影响者2例,运动功能受限者1例,外形一般者2例。所有患者无指甲畸形及增生性瘢痕发生;满意者1例,基本满意者14例,不满意者1例。结论采用足趾移植长手指全形再造手术,基本可以满足患者及医师对于缺损手指进行完美修复的目标。     

The oncogenic impact of RNF2 on cell proliferation,invasion and migration through EMT on mammary carcinoma

Mammary carcinoma (MC) is one of most common malignancy in women, and ring finger protein 2 (RNF2) possesses various roles in vast human tumors. In MC tissues as well as in cell lines RNF2 exhibited high expression, had significant association with tumor size, lymph node status, TNM stage, patients’ poor survival, and promoted cell proliferation, colony formation, cell migration and invasion of MC cell lines which was mediated by downregulation of E-cadherin protein. These data reveal that RNF2 protein plays a vital role in the development of MC and may be a potential therapy target of MC.     

Charcot hindfoot deformity reconstruction using a hindfoot nail- surgical technique

Various techniques of reconstruction of deformed Charcot hindfoot using different internal fixation devices have been described in the literature. We present our surgical technique using specific principles that has resulted in improved outcomes to allow correction of deformity, obtain stability and allow progression to weightbearing in orthotic shoes. We describe our preoperative evaluation, planning and surgical timing. We also hope to share some technical pearls and details on the finer points to achieve a satisfactory correction and reduce the learning curve.     

miR-9通过靶向E盒结合锌指蛋白2调控小细胞肺癌的恶性生物学行为及其可能的机制

目的：探讨 miR-9 通过靶向 E 盒结合锌指蛋白 2（zinc finger E-box binding homeobox 2，ZEB2）对小细胞肺癌（small cell lung cancer，SCLC）细胞生物学行为的调控作用，分析miR-9在SCLC中的作用及其工作机制。方法：采用qPCR、WB和免疫组化方法检测于2018年2月至2019年11月于河北医科大学第四医院肿瘤内科接受手术治疗的67例SCLC患者癌组织及癌旁组织中ZEB2的表达。采用TargetScan预测miR-9的潜在靶基因并通过双荧光素酶报告基因试验、qPCR和WB法进行验证。CCK-8法、流式细胞术和Transwell实验检测miR-9和ZEB2 过表达对 NCI-H446 的生物学行为影响，WB法检测对细胞中E-cadherin，N-cadherin和Vimentin蛋白表达的影响。利用miR-9过表达NCI-H446细胞构建SCLC裸鼠移植瘤模型，观察miR-9对裸鼠移植瘤生长的影响。结果：SCLC组织中ZEB2的mRNA和蛋白表达水平明显高于癌旁正常组织（P<0.01）。miR-9在ZEB2的3'' UTR上具有潜在的结合位点，与对照组相比，miR-9过表达组NCI-H446细胞中ZEB2的mRNA和蛋白表达水平明显降低（P<0.01），细胞增殖、迁移和侵袭能力均显著下降（P<0.05或P<0.01），促EMT蛋白表达减少，而同时过表达ZEB2能够逆转上述影响。体内实验中，miR-9过表达组移植瘤体积、重量均明显低于对照组（P<0.05或P<0.01）。miR-9组裸鼠肿瘤组织中和ZEB2蛋白的表达均较对照组明显降低（P<0.01）。结论：miR-9通过靶向调控ZEB2从而抑制SCLC细胞的生物学行为以及NCI-H446裸鼠移植瘤的生长。