Tryptophan 387 and 390 residues in ADAMTS13 are crucial to the ability of vascular tube formation and cell migration of endothelial cells

A disintegrin and metalloproteinase with thrombospondin motifs 13 (ADAMTS13) was mainly generated and secreted from endothelial cells (ECs). Our previous study showed that tryptophan (Trp) residues at 387 and 390 in ADAMTS13 are required for its secretion and enzymatic activity. However, the effects on its host cell as well as the potential mechanism have not been clear. The aim of the study was to examine the effects of Trp residues 387 and 390 of ADAMTS13 on the biological processes of ECs. Herein, Trp was substituted with alanine in ADAMTS13 to generate ADAMTS13 mutants at 387 (W387A), 390 (W390A), and double mutants at 387 and 390 (2WA), respectively. We found that substitution mutation impaired vascular endothelial growth factor (VEGF) secretion and the downstream JAK1/STAT3 activation, the binding ability to Von Willebrand factor, cell proliferation, migration, and vascular tube formation. Overall, our study concluded that Trp³⁸⁷ and Trp³⁹⁰ of ADAMTS13 play vital roles in the biological function of ECs.     

Evaluation of Outcomes following Radiofrequency Ablation for Treatment of Parotid Tail Warthin Tumors

PurposeTo evaluate efficacy and safety of radiofrequency (RF) ablation for parotid Warthin tumor.Materials and MethodsFrom September 2016 to August 2017, 7 consecutive patients with biopsy-proven parotid Warthin tumors who did not undergo surgery presented with symptoms or cosmetic concerns and underwent US-guided percutaneous RF ablation treatment. RF ablation procedures were performed using the moving shot technique. US, contrast-enhanced CT, or MR imaging was performed 6–12 months after each procedure. Complications and cosmetic scale improvement after RF ablation were also evaluated.ResultsThere was a significant reduction in mean tumor volume from 14.6 cm³ ± 13.1 (range, 1.9–35.5 cm³) to 0.8 cm³ ± 0.5 (range, 0.2–1.54 cm³) and a mean cosmetic scale improvement (from 4 to 1) on imaging studies 6–12 months after RF ablation compared with before RF ablation (P < .05). Volume reduction ratios at 1–2 months, 5–6 months, and 10–12 months after RF ablation were 51.2% ± 18.1%, 87.8% ± 10.6%, and 94.3% ± 2.0%. There was no facial nerve injury. One patient with parotitis and hematoma recovered in 1 week.ConclusionsRF ablation using the moving shot technique could be an effective and safe alternative treatment for parotid tail Warthin tumors in patients unsuitable for or unwilling to undergo surgical resection.     

Visuospatial Bias in Children with Autism Spectrum Disorder: Evidence from Line Bisection Tasks

Journal of Autism and Developmental Disorders - Previous studies have found reduced leftward bias of facial processing in individuals with Autism Spectrum Disorder (ASD). However, it is not clear...     

微小RNA-27b-3p与基质金属蛋白酶13在人软骨细胞的对应关系

目的探讨微小RNA-27b-3p(miR-27b-3p)与基质金属蛋白酶-13(MMP-13)在人软骨细胞表达及其靶向对应关系。 方法运用蛋白质印迹法(WB)与实时定量PCR技术(qRT-PCR)明确miR-27b-3p与MMP13在正常和骨关节炎(OA)人软骨细胞的表达。利用不同浓度的白介素(IL)1β干预原代人软骨细胞24 h,或利用不同时间点的IL-1β(10 ng/ml)干预原代人软骨细胞。利用原位杂交、转染及双荧光素酶报告技术确定miR-27b-3p与MMP13的靶向对应关系;结合运用核转录因子-κB(NF-κB)和丝裂原活化蛋白激酶(MAPK)信号通路抑制剂评估其作用机制。两组资料比较采用独立样本t检验,多组资料比较采用单因素方差分析,LSD法多重比较检验。 结果WB、qRT-PCR和原位杂交检测结果显示,与正常软骨相比,OA软骨中miR-27b-3p表达降低(t＝5.07,P<0.01),MMP13表达升高(t＝－6.31,P<0.01)。IL-1β干扰后的结果显示miR-27b-3p表达降低(F＝129.54,P<0.05),MMP-13表达升高(F＝394.50,P<0.05)。通过TargetScan数据库和荧光素酶报告基因检测结果分析,野生型-MMP13组荧光素酶活性降低(F＝55.27,P<0.001),突变型-MMP-13荧光素酶活性变化没有统计学意义(P＝0.654)。利用特异性MAPK信号抑制剂和NF-kB抑制剂干预IL-1β诱导软骨细胞模型结果提示,与对照组相比,抑制剂组的MMP13表达水平降低(F＝28.43,P<0.001),miR-27b-3p表达水平增高(F＝35.04,P<0.001)。 结论miR-27b-3p在OA软骨细胞呈现低表达,并负向调控MMP13的表达,其作用机制可能是通过NF-κB和MAPK信号通路,这结果提示这miR-27b-3p可能作为OA诊断与治疗的潜在靶点。     

腹腔镜完全腹膜外腹股沟疝修补术治疗阴囊疝的临床疗效

目的探讨腹腔镜完全腹膜外疝修补术（TEP）中两种不同方式处理阴囊疝疝囊的临床疗效及安全性。 方法回顾性分析2017年1月至2019年12月苏州市第九人民医院行完全腹膜外疝修补术治疗阴囊疝65例患者的病例资料。按术中疝囊处理方式不同分为A组（35例）和B组（30例）。A组患者疝囊横断,B组患者疝囊完全剥离。比较2组患者手术时间、术中出血量、术后住院时间及相关并发症发生情况。 结果A组手术时间、总并发症发生率均优于B组（P<0.05）;2组患者术中出血量、术后住院时间、术后并发症发生率比较,差异均无统计学意义（P>0.05）。术后随访6~24个月,2组均未复发。 结论采用TEP术治疗阴囊疝安全有效,且可行。TEP术中采用疝囊横断或疝囊剥离对术中出血量、术后住院时间、术后并发症发生率无影响,可根据患者的实际情况适合选择。疝囊横断手术难度相对较低,手术时间短,术后并发症少,更适合基层医院开展。     

沉浸式PBL模式在血液净化血管通路教学中的效果

目的评价沉浸式基于问题的学习(PBL)模式在血液净化血管通路教学中的效果。 方法研究对象为2019年9月至2021年9月贵州省各地医院参加血液净化血管通路培训的各级专科医生,前4期学员采取传统教学模式为对照组,后4期学员采用沉浸式PBL教学模式为研究组。培训结束后从理论知识、技能、满意度、评判性思维能力和带教老师自评方面进行考核。 结果与对照组相比,研究组的理论知识分数、临床操作技能分数,对培训的形式、规模、带教老师知识储备、培训效果的满意度,以及在寻求真相、求知欲、认知成熟度、系统化能力、分析能力及评判性思维能力方面的总分均增高(P<0.05)。此外,研究组的教师在培训场景、适时提问和讨论、操作规范性、有效考核评估以及突击应变能力方面的自评分数亦显著高于对照组(P<0.05)。 结论沉浸式PBL教学模式可以使血液净化血管通路培训的学员及带教老师在专业知识及实践操作能力方面得到进一步提升,值得推广。     

低功率钬激光与等离子剜除治疗中等体积前列腺增生的比较

目的对中等体积前列腺增生,通过比较低功率钬激光（LP-HoLEP）与等离子剜除（PKEP）的临床疗效,探讨低功率钬激光剜除前列腺增生的临床特点。 方法收集我院自2018年6月至2020年6月104例前列腺增生（30 ml1、IPSS、Q_max、RUV、PSA、剜除时间、粉碎时间、膀胱冲洗时间、术后尿管留置时间、住院时间、切除腺体质量、血红蛋白下降量等。统计两组患者术前及术后7 d、14 d及21 d尿白细胞升高例数,及术后6个月的IPSS评分、PSA、前列腺体积V₂等。 结果两组患者年龄、Hb、V₁、IPSS、Q_max、RUV、PSA、剜除时间、粉碎时间、腺体切除质量、血红蛋白下降值差异无统计学意义。LP-HoLEP组与PKEP组膀胱冲洗时间为（42.63±13.25）min和（51.67±11.65）min,术后尿管留置时间为（1.80±0.56） d和（2.23±0.83）d,术后平均住院天数为（2.90±0.70）d和（3.58±0.68）d,差异有统计学意义。两组患者尿白细胞升高例数随时间发生趋势性变化（F=132.842,P<0.05）,两组患者术后尿白细胞增多差异无统计学意义,（F=1.960,P=0.183）。随访6个月,LP-HoLEP和PKEP组IPSS评分降至（5.23±1.67）和（5.70±1.89）,PSA降至（1.17±0.40）和（1.04±0.37）ng/dl,前列腺体积V₂降至（15.93±2.18）ml和（15.25±2.73） ml。两组尿失禁和尿道狭窄等并发症发生率差异无统计学意义。 结论随访6个月,两组均能够有效剜除前列腺且降低PSA,同时改善LUTS,说明对治疗中等体积BPH均安全有效。LP-HoLEP虽然学习曲线较长,但可以减少膀胱冲洗、尿管留置及住院时间。因此,低功率钬激光剜除中等体积前列腺增生具有可行性且可进一步推广应用。     

Effect of male body mass index on clinical outcomes following assisted reproductive technology: a meta‐analysis

Overweight and obese males might exhibit a great risk of infertility. However, according to the current studies, the association between elevated male body mass index (BMI) and the clinical adverse results after assisted reproductive technology (ART) remains controversial. Hence, we conducted a meta‐analysis to evaluate the effects of raised male BMI on clinical outcomes following ART. PubMed, EMBASE and three Chinese databases were used to identify relevant studies. The primary outcome was clinical pregnancy rate. Secondary outcomes included live birth rate and sperm parameters. A total of 5262 male participants from 10 cohort studies were subjected to meta‐analysis. Results indicated that overweight or obese had no significant impact on clinical pregnancy rate [in vitro fertilisation (IVF): odds ratio (OR), 0.73; 95% confidence interval (CI), 0.39–1.39; intracytoplasmic sperm injection (ICSI): OR, 1.03; 95% CI, 0.92–1.15], live birth rate (IVF: OR, 0.91; 95% CI, 0.78–1.06; ICSI: OR, 1.00; 95% CI, 0.50–1.99) and sperm concentration (SMD, ?0.28; 95% CI, ?0.65 to 0.08) compared with normal weight following IVF/ICSI treatments. Exclusion of any single study and almost all the sensitivity analyses showed that our results were reliable. At present, the role of male BMI in the process of ART is only partly understood and should be further investigated.