大鼠坐骨神经缺损半个月后人工组织神经移植物修复的实验研究

为了观察人工组织神经移植物对大鼠坐骨神经非新鲜损伤的修复作用。我们在成年SD大鼠左侧股中部切除部分坐骨神经制造神经缺损模型。15d后,实验组(9只)用人工组织神经移植物修复神经缺损,自体神经修复作为阳性对照(6只),保持神经缺损为阴性对照(6只)。第二次手术后3个月,电生理学、形态学结果显示实验组的再生神经虽略差于自体对照组,但明显优于缺损对照组,腓肠肌的萎缩形态学指标变化则较接近自体对照组。实验结果表明人工组织神经移植物对已缺损15d的大鼠周围神经具有较好修复作用。     

脂联素在骨代谢中的研究进展

脂联素是由脂肪组织分泌的一种内源性细胞因子,与受体结合后,参与机体的代谢调节.因此脂联素及脂联素受体也成为治疗代谢性疾病的重要分子靶标.脂联素信号传导的研究对指导临床上骨代谢相关疾病的治疗有着积极的作用.本文就脂联素的生物学特性及其信号传导、脂联素对骨代谢的影响作一综述,为脂联素在骨代谢疾病中的治疗提供参考.     

血瘀证量化诊断流行病学调查数据的判别分析

目的:运用统计学方法研究对于血瘀证诊断具有较好区分能力的诊断方法和诊断标准。方法:在现代流行病学原则指导下进行血瘀证诊断的多中心、大样本临床资料收集,对其结果进行判别分析处理。结果:对75个变量进行 35步的逐步判别,共有33个项目进入方程,由此建立了血瘀型和非血瘀型的判别函数,并对33个自变量对血瘀证判别的贡献度进行区分。并对2004例患者进行了对判别结果的回顾性检验,总预测正确率为91.6%。结论:逐步判别分析可筛选出对鉴别两类具有不同属性的人群有较大贡献的条目,从而使其结果具有较好的区分度。     

Surgical management strategy for leiomyosarcoma of Zone I-II inferior vena cava: A case series

Objectives:Leiomyosarcoma of inferior vena cava (IVC) is a rare clinical entity with severe vascular involvement. Surgical management of leiomyosarcoma is still challenging.Methods:This a retrospective study of consecutive patients referred to our hospital from January 2017 to June 2019. Depending on the anatomical site of affected IVC, leiomyosarcomas were categorized into zone I-II. The clinical data including baseline information, surgical parameters, peri-operative management, short- and mid-term outcomes were observed.Results:Four patients with leiomyosarcoma of zone I-III underwent radical resection without intraoperative mortality. Prosthetic grafts were interpositioned in all patients to instruct vena cava. Renal vein reconstruction was perfumed in two patients due to involvement to renal veins. Median blood loss was 450 mL (200–600 mL), median operative time was 215 minutes (150–240 minutes). No Clavien-Dindo IIIa or higher complication was observed. No organ dysfunction and recurrence were observed with median follow-up of 25.5 months.Conclusions:Curative resection of zone I-II leiomyosarcoma is associated with longer survival in selected cases, en-bloc resection with complex vascular reconstruction could be considered.     

握球运动配合水胶体敷料透明贴在肺癌经外周中心静脉导管置管化疗患者并发症预防中的应用

目的 探讨握球运动配合水胶体敷料透明贴对降低经外周中心静脉导管（PICC）化疗肺癌患者并发症的作用。方法 选取2019年12月至2021年1月九江市第一人民医院呼吸内科收治的96例PICC置管化疗的肺癌患者作为研究对象,按照随机数字表法将其分为对照组与研究组,每组各48例。对照组患者采用50%的硫酸镁温敷,研究组患者采用水胶体敷料透明贴联合握球运动训练干预。比较两组患者置管3个月内的导管相关并发症发生率和置管前及置管后1、2、3个月置管肢体侧腋静脉最大血液流速（Vmax）、单位时间平均血液流速（TMFV）。结果 研究组患者干预后的静脉炎和静脉血栓发生率低于对照组,差异有统计学意义（P<0.05）。两组患者的渗血和导管异位发生率比较,差异无统计学意义（P>0.05）。两组患者置管前的Vmax、TMFV水平比较,差异无统计学意义（P>0.05）;两组患者置管后1、2、3个月的Vmax、TMFV水平低于置管前,差异有统计学意义（P<0.05）;研究组患者置管后1、2、3个月的Vmax、TMFV水平高于对照组,差异有统计学意义（P<0.05）;且组别、交互中差异有...     

Cell membrane-camouflaged PLGA biomimetic system for diverse biomedical application

The emerging cell membrane (CM)-camouflaged poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs) (CM@PLGA NPs) have witnessed tremendous developments since coming to the limelight. Donning a novel membrane coat on traditional PLGA carriers enables combining the strengths of PLGA with cell-like behavior, including inherently interacting with the surrounding environment. Thereby, the in vivo defects of PLGA (such as drug leakage and poor specific distribution) can be overcome, its therapeutic potential can be amplified, and additional novel functions beyond drug delivery can be conferred. To elucidate the development and promote the clinical transformation of CM@PLGA NPs, the commonly used anucleate and eukaryotic CMs have been described first. Then, CM engineering strategies, such as genetic and nongenetic engineering methods and hybrid membrane technology, have been discussed. The reviewed CM engineering technologies are expected to enrich the functions of CM@PLGA for diverse therapeutic purposes. Third, this article highlights the therapeutic and diagnostic applications and action mechanisms of PLGA biomimetic systems for cancer, cardiovascular diseases, virus infection, and eye diseases. Finally, future expectations and challenges are spotlighted in the concept of translational medicine.     

Penetration and Cratering of Steel Target by Jets from Titanium Alloy Shaped Charge Liners

In order to enlarge the crater diameter of shaped charge jet penetration into steel targets, this paper investigates the penetration and cratering characteristics of steel targets by shaped charge jets from titanium alloy liners. Titanium alloy shaped charge liners are prepared separately with mechanical processing and selective laser melting (SLM), and pulsed X-ray radiography is used to identify jet formation characteristics. Jet formation is numerically simulated by AUTODYN-3D, and steel target penetration tests are carried out at a short jet stand-off distance. The results show that AUTODYN-3D can realistically simulate jet formation from titanium alloy liners and that the SLM-processed liner exhibits better penetration performance than the mechanically processed liner. The existing cratering formula of jet penetration is modified to make it consistent with the aperture variations of jet penetration from titanium alloy-lined shaped charges at a short stand-off distance. The findings of this study are expected to provide technical and theoretical support for research on the penetration characteristics of the jets from titanium alloy-lined shaped charges.     

一条脑胶质瘤相关的全长基因的生物信息学分析

目的报道一条脑胶质瘤相关的全长新基因的生物信息学分析及其研究的结果。方法对507E08克隆子进行了测序,生物信息学分析和Northern blot分析。结果507E08基因为全长基因,长度为2002bp,共编码203个氨基酸,命名为人核糖体蛋白L14．22。经Northern blot证实507E08基因在人正常脑组织中低表达,而在人脑胶质瘤中高表达。结论生物信息学是一种有效分析未知基因的工具。507E08基因可能是与人脑胶质瘤形成有关的一条全长新基因。     

Antitumor effect of the angiogenesis inhibitor bevacizumab is dependent on susceptibility of tumors to hypoxia-induced apoptosis

Angiogenesis inhibition has been shown to enhance the therapeutic efficacy of cytotoxic chemotherapy in colorectal cancer. The basis of the contribution of this modality has not been defined fully. To determine the potential role of hypoxia-induced apoptosis, we studied a series of colon cancer cell lines with varying susceptibility to hypoxia. We exposed HT29 and HCT116 colon adenocarcinoma cell lines to sublethal periods of hypoxia three times weekly for 40 exposures, and derived cell lines both more resistant (from HT29) and more sensitive (from HCT116) to hypoxia-induced apoptosis. Both hypoxia-derived cell lines demonstrated more rapid growth than the parental lines when implanted subcutaneously in immunodeficient mice. Treatment of tumor-bearing mice with bevacizumab resulted in depletion of tumor microvasculature, upregulation of Hypoxia-inducible factor-1 alpha (HIF-1alpha), and increased pimonidazole staining, consistent with an anti-angiogenic effect and induction of hypoxia in tumors derived from all cell lines. The proportion of apoptotic cells was increased in all the treated tumors, and was most pronounced in the bevacizumab-treated HCT116-derived cells. The bevacizumab-treated tumors showed growth delay in HT29 and its derivative, and the parental HCT116. In the hypoxia-sensitive HCT116-derived tumors, marked tumor shrinkage and prolonged growth control occurred. Therefore, bevacizumab treatment is an effective inducer of a hypoxic environment, but the resulting cell kill and tumor shrinkage is determined by the susceptibility of the tumor to apoptosis. The induction of apoptosis by hypoxia may contribute to the benefits of such treatment in the clinical setting.