Effects and long‐term follow‐up of using umbilical cord blood–derived mesenchymal stromal cells in pediatric patients with severe BK virus‐associated late‐onset hemorrhagic cystitis after unrelated cord blood transplantation

This is a retrospective study to evaluate the efficacy and safety of umbilical cord blood–derived mesenchymal stromal cells (MSCs) for the treatment of pediatric patients with severe BK virus–associated late‐onset hemorrhagic cystitis (BKV‐HC) after unrelated cord blood transplantation (UCBT). Thirteen pediatric patients with severe BKV‐HC from December 2013 to December 2015 were treated with MSCs. The number of MSCs transfused in each session was 1 × 10⁶/kg once a week until the symptoms improved. The median follow‐up time was 1432 (89‐2080) days. The median frequency of MSC infusion was 2 (1‐3), with eight cured cases and five effective cases; the total efficacy rate was 100%. The copy number of urine BKV DNA was 4.43 (0.36‐56.9) ×10⁸/mL before MSC infusion and 2.67 (0‐56.3) ×10⁸/mL after MSC infusion; the difference was not significant (P = .219). There were no significant differences in the overall survival, disease‐free survival, and the incidence of relapse and acute and chronic graft‐versus‐host disease between the MSC infusion group and non‐MSC infusion group. There was also no significant difference in the cytomegalovirus, Epstein‐Barr virus (EBV), and fungal and bacterial infection rates between the two groups. Although umbilical cord blood–derived MSCs do not reduce the number of BKV DNA copies in the urine, the cells have a high efficacy rate and minimal side effects in treating severe BKV‐HC after UCBT among pediatric patients. MSCs do not affect the rates of relapse, long‐term infection, or survival of patients with leukemia.     

全膝关节置换后双下肢长度及相关功能变化

文题释义： 膝关节置换：一种治疗膝关节终末期病变的手术方式，可明显减轻患者膝关节疼痛，改善膝关节功能，但尚有约20%患者存在术后不满意情况，需进一步研究加以改善。 下肢全长片：完整呈现全部下肢解剖结构的影像记录方法，可用于评估下肢总体力线(髋膝踝角)及下肢功能长度，为膝关节置换提供术前参考及术后功能评价。 背景：膝关节置换后功能不佳的原因有许多，下肢不等长作为其中的一种，对膝关节置换后功能的影响程度尚未被充分研究。 目的：分析全膝关节置换后患者下肢不等长的变化程度、可能影响因素及功能变化。 方法：收集徐州医科大学附属医院骨科自2016年10月至2018年9月行全膝关节置换患者107例(124膝)，男23例，女84例。单侧全膝关节置换90例(90膝)，双侧全膝关节置换17例(34膝)，其中分次双侧全膝关节置换且间隔时间超过6个月的3例(6膝)并入单膝组；因此单膝组共93例(96膝)，双膝组14例(28膝)。患者对治疗及试验方案知情同意，且得到医院伦理委员会批准。分别于术前、术后10 d及术后6个月拍摄患者站立位下肢全长正位片并测量记录下肢长度及髋膝踝角，大体测量膝关节屈曲挛缩角并记录美国特种外科医院膝关节评分。 结果与结论：①全膝关节置换后患者下肢长度随着畸形矫正而增长，术后6个月下肢长度长于术后10 d，术后10 d 时70.2%的患者下肢增长，术后6个月79.0%的患者肢体增长；②术后10 d及术后6个月时，术后屈曲挛缩角矫正量与术后下肢长度变化量呈正相关；③术侧肢体延长程度与术后美国特种外科医院膝关节评分增量呈正相关；④术前与术后下肢不等长发生率接近，术前为45.1%，术后10 d为 55.3%，术后6个月为46.0%；⑤术前及术后6个月下肢不等长受双下肢畸形差值影响，术前的影响因素为双下肢髋膝踝角差值及双下肢屈曲挛缩角差值；术后6个月时影响下肢不等长的因素是双下肢屈曲挛缩角差值；术前及术后6个月时下肢不等长影响双下肢美国特种外科医院膝关节评分差值。 ORCID: 0000-0002-9642-4136(唐金龙) 中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程     

马兜铃酸对斑马鱼的耳毒性及肾毒性研究

目的探讨马兜铃酸对斑马鱼的耳毒性及肾毒性。方法①使用不同浓度的马兜铃酸处理受精后5天(5 dpf)的AB系斑马鱼,探索马兜铃酸对斑马鱼的最大非致死浓度(maximum non-lethal concentration,MNLC)。②依据MNLC选取4个浓度(MNLC、1/2MNLC、1/4MNLC及1/8MNLC)为实验组,2.5μg/ml庆大霉素为阳性对照组,溶剂组[1.0%二甲基亚砜(DMSO)]为阴性对照组,每组分别处理30尾斑马鱼。24 h后,每组取10尾斑马鱼用DASPEI染料对斑马鱼身体侧线毛细胞进行荧光染色,分析马兜铃酸对毛细胞的影响。每组剩余的20尾斑马鱼继续饲养至72 h,观察肾包膜的情况。结果①实验所用马兜铃酸浓度无法得出其MNLC,取其中未出现斑马鱼死亡的最大浓度(3.4μg/ml)为MNLC。②庆大霉素组毛细胞的损伤率为88.5%,与阴性对照组比较,差异有统计学意义(P<0.01);马兜铃酸MNLC组、1/2MNLC组、1/4MNLC组及1/8MNLC组毛细胞损伤率分别为-7.2%、6.9%、-0.4%、12.4%,与阴性对照组比较,差异均无统计学意义(P>0.05)。③继续处理斑马鱼至72 h后,马兜铃酸MNLC组斑马鱼全部死亡;1/2MNLC组10%的斑马鱼死亡,余下11.1%的斑马鱼出现严重的肾包膜水肿;1/4MNLC组、1/8MNLC组未观察到肾包膜水肿。结论本实验所用浓度的马兜铃酸对斑马鱼有肾毒性,无耳毒性。     

Toxicological study of metal and metal oxide nanoparticles in zebrafish

Metal and metal oxide nanoparticles have been widely used in catalytic, electronic and biomedical fields. It is necessary to investigate their toxicity and potential hazards to human and aquatic ecosystems. Zebrafish (Danio rerio), as a promising animal model, has been increasingly utilized to assess the toxicity of nanoparticles. Zebrafish has numerous characteristics for toxicity evaluation, such as short life cycle and high fecundity. This review describes the advantages of using zebrafish in the toxicity assessment of metal and metal oxide nanoparticles. Then we focus on the toxic effects, particularly the acute toxicity and the chronic ones, induced by nanoparticles in zebrafish. Target organ toxicities are also mentioned, including immunotoxicity, developmental toxicity, neurotoxicity, reproductive toxicity, cardiovascular toxicity and hepatotoxicity. The toxic effects of selected metal nanoparticles, including Au, Ag, Cu, and metal oxide nanoparticles such as TiO₂, Al₂O₃, CuO, NiO and ZnO, as well as the underlying mechanisms of nanoparticles causing these effects, are also highlighted and described in detail. Furthermore, we introduce the general factors that affect nanoparticle-induced toxicity in zebrafish. The drawbacks and advantages of using the zebrafish model in nanotoxicity studies are also argued. Finally, we suggest that the application of zebrafish to assess chronic toxicity of metal and metal oxide nanoparticles and the joint toxicity of metal and metal oxide nanoparticles and other pollutants could be hot topics in nanotoxicology.     

Revisiting vascular and venous drainage of lateral arm flap from anatomy

European Journal of Orthopaedic Surgery & Traumatology -     

基于物联网的医院消防安全管理

医院消防物联网将原本与网络无关的消防设施和网络结合起来,将消防监督管理、防火灭火所需的相关信息进行汇总,可以让医院更加轻松地发现和处理医院的警情信息,降低火灾发生频率。医院火灾的特点医院是人员密集场所,发生火灾时,极容易出现踩踏等问题,进而严重威胁群众的生命财产安全。医院拥有大量贵重的医疗设备,一旦这些医疗设备发生火灾,将带来巨大损失。医院内部老弱病残者居多,发生火灾时,人员转移困难,很多患者由于自身问题难以快速逃生,增加了救护的难度。     

Relationship between rosacea and sleep

Rosacea is a chronic facial skin disease involved in neurovascular dysregulation and neurogenic inflammation. Behavioral factors such as stress, anxiety, depression and sleep were identified to be associated with other inflammatory skin diseases. Few studies have reported sleep status in rosacea. Aiming to investigate the relationship between rosacea and sleep, a case–control survey was conducted, enrolling 608 rosacea patients and 608 sex- and age-matched healthy controls. Sleep quality was assessed through the Pittsburgh Sleep Quality Index (PSQI) questionnaire. Diagnosis and severity grading of rosacea were evaluated under the standard guidelines of the National Rosacea Society. More rosacea patients (52.3%, n = 318) suffered poor sleep quality (PSQI, >5) than the healthy controls (24.0%, n = 146), displaying a much higher PSQI score (rosacea vs control, 6.20 vs 3.95). There was a strong association between sleep quality and rosacea (odds ratio [OR], 3.525; 95% confidence interval [CI], 2.759–4.519). Moreover, the severity of rosacea was also associated with sleep quality (OR, 1.847; 95% CI, 1.332–2.570). Single nucleotide polymorphisms in hydroxytryptamine receptor 2A and adrenoceptor-β1 genes, which are associated with sleep behaviour, were detected and revealed to be associated with rosacea. Furthermore, the LL-37-induced rosacea-like phenotype and sleep-deprivation mice models were applied, revealing that sleep deprivation aggravated the rosacea-like phenotype in mice, with higher expression of matrix metallopeptidase 9, Toll-like receptor 2, cathelicidin antimicrobial peptide and vascular endothelial growth factor. In conclusion, rosacea patients presented poorer sleep quality, as well as a higher propability of genetic background with sleep disturbance. In addition, poor sleep might aggravate rosacea through regulating inflammatory factors, contributing to a vicious cycle in the progression of disease.