青年人群近距离工作后眼部参数的变化及恢复时间

目的：观察青年人群近距离用眼后眼部生理及功能性参数的变化及恢复时间。

方法：前瞻性研究。随机选取2019-12/2020-06在我院进行医学验光的患者69例138眼，根据主觉验光结果分为正视组(+0.75D≤等效球镜度≤-0.50D，18例36眼)、低度近视组(-0.75D≤等效球镜度≤-3.00D，25例50眼)和中度近视组(-3.25D≤等效球镜度≤-6.00D，26例52眼)。所有受试者近距离阅读20min后远眺放松20min，分别于近距离用眼前、近距离用眼20min后、远眺5、10、15、20min时测量受试者眼部生理性参数\〖前房深度(ACD)、眼轴长度(AL)\〗和功能性参数\〖正相对调节(PRA)、调节反应(BCC)\〗，分析各参数的达极时间和恢复时间。

结果：近距离用眼后眼轴变长，前房变浅，PRA绝对值变大，BCC无明显变化，75%(52/69)的受试者AL在近距离用眼20min后达极，87%(60/69)的受试者ACD在远眺5min时达极，96%(66/69)的受试者PRA在近距离用眼20min后达极，且以上参数均在远眺10min后逐渐恢复至初始状态。

结论：近距离用眼后眼部参数发生改变，眼轴变长，前房变浅，PRA绝对值增大，但均在远眺放松过程中逐渐回退，且均需要10min以上才能恢复至初始状态。     

Silica-coated graphene compared to Si-CdSe/ZnS quantum dots: Toxicity,emission stability,and role of silica in the uptake process for imaging purposes

Quantum dots (QDs) present a special type of nanocrystals (NCs) due to their unique optical and chemical properties. While cadmium-based QDs (Cd-QDs) have the most favorable physicochemical properties, their toxicity, instability in the aqueous phase, and loss of brightness at high temperature are some of the obstacles that prevent the wide use of Cd-QDs. Carbon-based QDs as graphene quantum dots (GQDs) represent a very promising biocompatible replacement. In the present work, we mainly focus on comparing the efficiency and uptake of GQDs and Cd-QDs for fluorescent imaging purposes and studying the effect of growing silica shell on the emission and the uptake of QDs inside living human and bacterial cells. Graphene and CdSe/ZnS QDs were prepared and encapsulated in silica to increase their emission and uptake by living cells. Moreover, we studied their photostability and cytotoxicity. The Prepared G-Si QDs showed good emission inside the cytoplasmic portion of the liver hepatocellular carcinoma cell line (HepG2) and Bacillus subtilis (B. subtilis), but they revealed lower photoluminescence (PL) intensity compared to Si-CdSe/ZnS NCs although G-Si QDs are advantageous in other aspects, i.e. possess lower toxicity and higher stability with temperature variations.     

The potential markers of endocrine resistance among HR+ /HER2+ breast cancer patients

Clinical and Translational Oncology - Breast cancer with positive hormone receptor (HR) and human epidermal growth factor receptor-2 (HER2) is a special subgroup with different clinical features...     

酸枣仁汤治疗原发性肝癌患者肝血不足型失眠的临床研究

目的观察酸枣仁汤治疗原发性肝癌患者肝血不足型失眠的临床疗效及其对神经-内分泌-免疫网络的调节作用。方法将70例原发性肝癌伴肝血不足型失眠患者随机分为治疗组与对照组,每组35例。两组均以常规中西医结合治疗原发性肝癌为基础,治疗组给予酸枣仁汤颗粒剂,对照组给予安慰剂,连续28 d。比较匹兹堡睡眠质量指数(PSQI)量表评分、中医证候评分、血红蛋白(Hb)、血小板(PLT)、前白蛋白(PAB)、血清5-羟色胺(5-HT)、褪黑素(MT)、白介素-2受体(IL-2R)、白介素-6(IL-6)、白介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)的变化情况。结果 (1)治疗组总有效率88.2%,对照组总有效率27.3%,治疗组疗效优于对照组,差异有统计学意义(P0.05);(2)治疗组治疗后PSQI总分及各成分评分、中医证候评分较对照组及治疗前显著降低(P0.05),各评分治疗前后差值大于对照组(P0.05);(3)治疗组治疗后血清5-HT、MT含量较对照组及治疗前显著升高(P0.05),治疗组血清IL-2R、IL-8、TNF-α含量较对照组及治疗前显著降低(P0.05),以上指标治疗前后差值均大于对照组(P0.05),治疗组治疗后血清IL-6含量与对照组及治疗前比较,差异无统计学意义(P0.05),治疗前后差值与对照组比较无显著差异(P0.05);(4)治疗组治疗后Hb、PAB较对照组及治疗前显著升高(P0.05),治疗前后差值大于对照组(P0.05)。结论酸枣仁汤可有效改善原发性肝癌伴肝血不足型失眠患者的睡眠情况、营养水平以及肝血不足的症状,能提高患者血清5-HT、MT含量,降低血清IL-2R、IL-8、TNF-α含量,调节神经-内分泌-免疫网络,改善肝癌患者体内炎症环境,提示安神以扶正在恶性肿瘤虚证中具有辅助治疗作用。     

东盟国家输入我国新型冠状病毒肺炎病例流行病学特征分析

  目的  了解2020年1月1日至2021年2月28日东盟国家输入我国新型冠状病毒肺炎（COVID-19）病例的流行病学特征，为我国调整针对东盟国家入境人员COVID-19疫情防控策略提供基础信息。  方法  从中国疾病预防控制信息系统全国传染病报告信息管理系统获取输入我国病例数据，从世界卫生组织网站获取全球各国报告的COVID-19病例数据。 运用描述性流行病学方法,分析东盟输入我国COVID-19病例的社会人口学特征、临床分型、三间分布及诊断及时性。  结果  2020年1月至2021年2月东盟国家输入我国（不含香港、澳门特别行政区和台湾地区，下同）COVID-19病例1 585例，占全球输入我国病例的18.51%。 病例男、女性别比为3.95∶1，年龄为（35.21±11.09）岁；职业分布以工人（21.26%）、家政家务（13.56%）、商业服务（12.93%）为主。 输入病例以无症状感染为主（921例，58.11%），其次为普通型（407例，25.68%）和轻型（256例，16.15%）。 输入病例发病高峰为2020年8 — 10月(940例，59.46%)。 病例感染来源国主要为菲律宾（775例，48.90%）、印度尼西亚（301例，18.99%）和新加坡（279例，17.60%），入境后目的地分布在24个省份，主要为广东省（420例，26.50%）、福建省（255例，16.09%）和上海市（137例，8.64%）。 83.85%的输入病例能在发病后3 d内得到诊断。  结论  东盟国家输入COVID-19病例以男性青壮年无症状感染者为主。 鉴于东盟国家近期仍对我国构成较大的输入风险，各入境点仍应严格落实我国现有的防控措施。     

Assessment of the deep resection margin during oral cancer surgery: A systematic review

The main challenge for radical resection in oral cancer surgery is to obtain adequate resection margins. Especially the deep margin, which can only be estimated based on palpation during surgery, is often reported inadequate. To increase the percentage of radical resections, there is a need for a quick, easy, minimal invasive method, which assesses the deep resection margin without interrupting or prolonging surgery. This systematic review provides an overview of technologies that are currently being studied with the aim of fulfilling this demand.A literature search was conducted through the databases Medline, Embase and the Cochrane Library. A total of 62 studies were included. The results were categorized according to the type of technique: ‘Frozen Section Analysis’, ‘Fluorescence’, ‘Optical Imaging’, ‘Conventional imaging techniques’, and ‘Cytological assessment’. This systematic review gives for each technique an overview of the reported performance (accuracy, sensitivity, specificity, positive predictive value, negative predictive value, or a different outcome measure), acquisition time, and sampling depth.At the moment, the most prevailing technique remains frozen section analysis. In the search for other assessment methods to evaluate the deep resection margin, some technologies are very promising for future use when effectiveness has been shown in larger trials, e.g., fluorescence (real-time, sampling depth up to 6 mm) or optical techniques such as hyperspectral imaging (real-time, sampling depth few mm) for microscopic margin assessment and ultrasound (less than 10 min, sampling depth several cm) for assessment on a macroscopic scale.