HLA—DR2,DRB1＊0301,DQA1＊0501基因频率与肌炎及其临床表现的 …

目的：观察人类白细胞相关抗原ＨＬＡ－ＤＲ２，ＤＲＢ１＊０３０１，ＤＱＡ１＊０５０１基因频率为多发性肌炎／皮肌炎（ＰＭ／ＤＭ）发病及其临床表现的关系，方法：特异性引物聚合酶链式反应（ＰＣＲ－ＳＳＰ）方法分别测定了３１例ＰＭ／ＤＭ患者及５０例正常人的ＨＬＡ－ＤＲ２，ＤＲＢ１＊０３０１及ＨＬＡ－ＤＡＱ１＊０５０１的基因频率，结果：三种基因型在３１例肌炎患得中基频率分别为：６．４５％，９．６８％和７７．４     

Paclitaxel-induced stress granules increase LINE-1 mRNA stability to promote drug resistance in breast cancer cells

Abnormal expression of long interspersed element-1 (LINE-1) has been implicated in drug resistance, while our previous study showed that chemotherapy drug paclitaxel (PTX) increased LINE-1 level with unknown mechanism. Bioinformatics analysis suggested the regulation of LINE-1 mRNA by drug-induced stress granules (SGs). This study aimed to explore whether and how SGs are involved in drug-induced LINE-1 increase and thereby promotes drug resistance of triple negative breast cancer (TNBC) cells. We demonstrated that SGs increased LINE-1 expression by recruiting and stabilizing LINE-1 mRNA under drug stress, thereby adapting TNBC cells to chemotherapy drugs. Moreover, LINE-1 inhibitor efavirenz (EFV) could inhibit drug-induced SG to destabilize LINE-1. Our study provides the first evidence of the regulation of LINE-1 by SGs that could be an important survival mechanism for cancer cells exposed to chemotherapy drugs. The findings provide a useful clue for developing new chemotherapeutic strategies against TNBCs.     

Higher Dosage of HIFU Treatment May Lead to Higher and Longer Efficacy for Moderate to Severe Perennial Allergic Rhinitis

Objectives: This study was to compare the efficacies and side effects of high intensity focused ultrasound (HIFU) treatment for perennial allergic rhinitis (PAR) with regular and increased dosage.Study design: A prospectively assembled cohort was retrospectively analyzed through visual analogue scale (VAS).Methods: Regular dosage of HIFU treatment was applied to 56 PAR patients in group A. An increased dosage as twice as the regular one was applied to 48 patients in group B. Nasal obstruction, sneezing, rhinorrhea and rhinocnesmus, which were recognized as the four main symptoms of allergic rhinitis (AR), were evaluated before treatment, 3 months after treatment, and 1 year after treatment. The satisfaction of patients was also evaluated at 1 year postoperatively. Biopsy of the inferior turbinate and morphometric analysis were applied to 11 patients in group A and 10 in group B before HIFU treatment and 3 months after treatment.Results: Comparing the AR symptoms before treatment, There is no statistical difference observed between group A and B (p>0.05). The four main symptoms at 3 months and 1 year after treatment were all significantly improved (p<0.01) in both group A and B. The VAS scores of AR symptoms in Group B were lower than those in Group A at the same stage after treatment, especially at 1 year after treatment (p<0.05). Comparing the results at 3 months and 1 year after treatment, a tendency of recurrence of these symptoms was observed statistically in group A (p<0.05), but not in group B (p>0.05). More cases of nasal dryness and perirhinal swelling were found in group B than those in group A (p<0.05), while all side effects were mild and temporary. Patients in group B were more satisfied than those in group A (p=0.0866 >0.05), though not statistically significant. More reduction of the eosinophils, other inflammatory cells, and the submucosal glands was observed after HIFU treatment in group B than that in group A (p<0.05).Conclusions: A proper increment of HIFU dosage may be recommended to meet the needs of more improvement of AR symptoms and less recurrence.     

Constructing Rh–Rh3+ modified Ta2O5@TaON@Ta3N5 with special double n–n mutant heterojunctions for enhanced photocatalytic H2-evolution

A multiple core–shell heterostructure Rh–Rh³⁺ modified Ta₂O₅@TaON@Ta₃N₅ nanophotocatalyst was successfully constructed through nitriding Rh³⁺-doped Ta₂O₅ nanoparticles, which exhibited a much higher carrier separation efficiency about one order of magnitude higher than the Ta₂O₅@Ta₃N₅ precursor, and thus an excellent visible light photocatalytic H₂-evolution activity (83.64 μmol g⁻¹ h⁻¹), much superior to that of Rh anchored Ta₂O₅@TaON (39.41 μmol g⁻¹ h⁻¹), and improved stability due to the residual Rh–O/N in the Ta₃N₅ shell layer. Rh-modifying significantly extended light absorption to the overall visible region. Localized built-in electric fields with hierarchical potential gradients at the multiple interfaces including a Rh/Ta₃N₅ Schottky junction and double n–n Ta₃N₅/TaON/Ta₂O₅ mutant heterojunctions, drove charge carriers to directionally transfer from inside to outside, and efficiently separate. Enhanced photoactivity was ascribed to a synergetic effect of improved light absorption ability, increased carrier separation efficiency, and accelerated surface reaction. A promising strategy of developing excellent Ta₃N₅-based photocatalysts for solar energy conversion is provided by constructing double n–n mutant heterojunctions.

Localized built-in electric fields at multiple hierarchical interfaces facilitate the efficient separation and fast inside-out directional transfer of photogenerated carriers.     

不同碳水化合物肠内营养液对应激性高血糖患者早期血糖水平与预后的影响

目的观察不同的碳水化合物肠内营养液［肠内营养乳剂（TPF-D）和肠内营养混悬液（TPF）］用于早期肠内营养对应激性高血糖患者血糖水平与预后的影响,探讨其作为应激性高血糖患者早期肠内营养制剂的临床可行性。 方法选入2020年6至10月徐州医科大学附属医院急诊ICU收治的合并应激性高血糖的患者为研究对象。根据入排标准,最终71例患者纳入研究,随机数字表法将其分为观察组（35例,鼻饲TPF-D）和对照组（36例,鼻饲TPF）。收集患者一般资料,包括性别、年龄、急性生理与慢性健康状况（APACHE Ⅱ）评分;记录患者第1、3、7天每4小时一次血糖数据,并计算平均血糖值（GLU_AVE）、平均血糖波动幅度（GLU_MAGE）;计算治疗后3、7 d胰岛素应用总量;监测患者第1、7天相关营养指标变化,如总蛋白（TP）、白蛋白（ALB）、前白蛋白（PA）;记录胃肠道并发症（如反流、呕吐、腹泻、腹胀等）、ICU住院时间及28 d病死率。 结果（1）2组性别比例、年龄、APACHE Ⅱ评分比较,差异均无统计学意义（P＞0.05）。（2）2组第1、3、7天GLU_AVE及第1、3天GLU_MAGE比较,差异均无统计学意义（P＞0.05）;观察组第7天GLU_MAGE显著低于对照组,差异有统计学意义［（0.72±0.08）mmol/L vs（1.56±0.10）mmol/L,t=6.22,P=0.02］。（3）观察组治疗3、7 d胰岛素应用总量显著低于对照组,差异均有统计学意义［（60.40±39.80）U vs（102.70±49.60）U,t=0.17,P=0.02;（110.50±43.30）U vs（202.80±56.40）U,t=2.52,P=0.01］。（4）2组第1、7天TP、PA、ALB比较,差异均无统计学意义（P＞0.05）。（5）2组胃肠道并发症、ICU住院时间、28 d病死率比较,差异均无统计学意义（P＞0.05）。 结论应激性高血糖患者早期营养中,TPF-D较TPF能更好地降低血糖变异性,控制血糖波动幅度,并减少临床中胰岛素用量,但不影响预后。     

Dynamic fluorescence lifetime sensing with CMOS single-photon avalanche diode arrays and deep learning processors

Measuring fluorescence lifetimes of fast-moving cells or particles have broad applications in biomedical sciences. This paper presents a dynamic fluorescence lifetime sensing (DFLS) system based on the time-correlated single-photon counting (TCSPC) principle. It integrates a CMOS 192 × 128 single-photon avalanche diode (SPAD) array, offering an enormous photon-counting throughput without pile-up effects. We also proposed a quantized convolutional neural network (QCNN) algorithm and designed a field-programmable gate array embedded processor for fluorescence lifetime determinations. The processor uses a simple architecture, showing unparallel advantages in accuracy, analysis speed, and power consumption. It can resolve fluorescence lifetimes against disturbing noise. We evaluated the DFLS system using fluorescence dyes and fluorophore-tagged microspheres. The system can effectively measure fluorescence lifetimes within a single exposure period of the SPAD sensor, paving the way for portable time-resolved devices and shows potential in various applications.     

全肘关节置换术的临床应用及疗效分析

 目的 探讨全肘关节置换术治疗老年肱骨远端粉碎性骨折和肘部类风湿关节炎的临床疗效。方法 自2006年4月至2012年6月,应用半限制型全肘关节置换术治疗老年肱骨远端粉碎性骨折9例、肘部类风湿关节炎4例。男3例,女10例;50岁1例,大于60岁12例。肱骨远端骨折AO分型C2型3例、C3型6例。其中8例一期行全肘关节置换,1例开放性骨折（Gustilo-AndersonⅠ型）二期行全肘关节置换。4例肘部类风湿关节炎患者平均病程7.8年,Mayo分期Ⅲ期1例、Ⅳ期2例、Ⅴ期1例。全部采用铰链式-半限制型假体,以骨水泥固定。结果 手术时间120~180 min,平均150 min;出血量250~550 ml,平均400 ml;住院时间16~55 d,平均30.2 d。全部病例获得随访,随访时间15~82个月,平均 39.5个月。12例切口一期愈合,1例类风湿关节炎患者发生急性切口感染。切口感染病例病原学检查为阴沟杆菌,经二期手术清理、置管冲洗引流4周,应用敏感抗生素治疗后痊愈。该例术中截骨时发生肱骨外髁骨折,给予克氏针张力带固定,术后4个月骨性愈合。随访期间全部病例均未发生假体松动、脱位等并发症。X线片示假体位置良好,7例骨水泥界面出现透光区。Mayo肘关节功能评分优3例、良8例、可2例,优良率84.6%（11/13）。结论 全肘关节置换治疗肘部类风湿关节炎和老年肱骨远端粉碎性骨折有效,但必须严格掌握手术适应证和遵循手术操作技巧,治疗肘部类风湿关节炎时术中及术后并发症发生率较高。     

三维胸腔镜辅助下心脏外科手术50例

目的 总结三维(3D)胸腔镜辅助下心脏外科手术的疗效和安全性.方法 对2013年10月至2014年7月50例3D胸腔镜辅助下心脏手术进行回顾性分析,包括房间隔缺损修补术5例,室间隔缺损修补术1例,三房心、无顶冠状窦综合征及部分型心内膜垫缺损矫治术各1例,二尖瓣置换术28例(含再次手术1例),三尖瓣置换术1例,二尖瓣成形术9例,左房黏液瘤切除术2例及左乳内动脉采集术+小切口冠状动脉旁路移植术1例.采用Karl Storz 3D摄像系统、30°胸腔镜、高清3D显示屏及配套手术器械,股动静脉及经颈上腔静脉插管建立体外循环,在3D图像引导下完成胸内操作.结果 全组无围术期死亡,其中因心包粘连中转正中开胸1例.平均手术时间(232.8 ±54.7)min,体外循环时间(128.0±42.5)min,主动脉阻断时间(74.7 ± 25.1) min.平均ICU停留时间(30.4±22.0)h,呼吸机辅助通气时间(13.7±11.9)h.平均胸腔引流时间(3.34±1.91)天,平均住院时间(6.52±3.06)天.术后并发症11例(22％),包括术后出血4例,切口感染1例,胸腔积液3例,臂丛神经损伤1例,顽固性呃逆1例,轻度瓣周漏1例.与同期20例2D胸腔镜下二尖瓣置换术对比,3D组手术时间、体外循环时间及主动脉阻断时间无显著差异(P＞0.05).结论 3D胸腔镜辅助下心脏外科手术是安全可行的,值得进一步推广和普及.