医疗领域人工智能应用的研究进展＊

人工智能引发了医疗领域的数字革命，在推动行业发展方面具有极大潜力。本研究围绕临床诊疗、医学研究和公共卫生三个基本场景，聚焦人工智能与传统中医药的交叉与融合，并着重介绍人工智能在疾病诊断、决策支持、医学研究以及重大公共卫生事件中的应用。虽然人工智能在诸多方面显示出独特优势，但仍存在透明度不高、缺乏安全性评估和相关法律法规监管等问题需要谨慎解决，以促进人工智能技术在医疗领域的推广。     

从环境隐喻的角度看外感病的因机证治＊

外感病是感受六淫、疫毒等外界因素引起的疾病，现代医学认为其主要致病因素为细菌或病毒。在以肉身体验为主要认知手段的古代，中医学家不可能发现细菌或病毒的存在，因而中医学家往往以天人相应的整体观来把握认知外感病。由于外感病的发病与传播受到外界气候环境和社会环境的影响，尤与人体的内环境密切相关。有鉴于此，本文从“环境隐喻”的立场出发，对外感病发病的因机证治进行分析。外界的气候环境和社会环境容易被人们感受，而对于古代无法观察人体的内环境，作者借助《论语·季氏将伐颛臾》中“祸起萧墙”的故事，对人体内环境为何与外感病的发病关系密切作以阐释，并通过人参败毒散、达原饮等方证的案例式说明，揭示清理人体内外环境而达治疗外感病的机理。     

Monitoring vegetation dynamics using the universal normalized vegetation index (UNVI): An optimized vegetation index-VIUPD

This paper propose a universal normalized vegetation index (UNVI), which is an improved vegetation index (VI) based on the universal pattern decomposition method (UPDM), termed VIUPD. We also derive new matrices to facilitate convenient calculation of the UNVI based on data from the MODIS and Landsat-TM, ETM, OLI satellite sensors. We compared the performance of the UNVI to the normalized difference vegetation index (NDVI), enhanced vegetation index (EVI) and modified soil adjusted vegetation index 2 (MSAVI2) to estimate the vegetation dynamics (chlorophyll content and leaf area index [LAI]). The results show that the UNVI was more sensitive to vegetation dynamics than the NDVI, EVI and MSAVI2. The UNVI has a higher LAI saturation point than the other three indices. The UNVI can be used to monitor global changes in above ground biomass (AGB) and gross primary production (GPP) with respect to a wide range of vegetation dynamics.     

Work stress and the risk of cancer: A meta-analysis of observational studies

Epidemiological studies have explored the relationship between work stress and the risk of cancer, but it remains unclear on whether work stress could increase the risk of cancer, or by other factors such as smoking and physical activity. Our study aimed to investigate the association between work stress and the risk of cancer and in relation to major potential confounding and modifying factors. We systematically searched three electronic databases, hand-searched references and citations of retrieved articles, and consulted experts to identify studies on assessing the association between work stress and the risk of cancer. The relative risks (RRs) of cancer associated with work stress were estimated using a random-effects model, and stratified by exposure measurement, study design, gender, study location, cancer site, smoking, drinking, body mass index, and physical activity. A total of 281,290 participants were included in this analysis. The significant association between work stress and the risk of colorectal (RR = 1.36; 95%CI: 1.16–1.59), lung (RR = 1.24; 95%CI: 1.02–1.49), and esophagus (RR = 2.12; 95%CI: 1.30–3.47) cancers were found. A statistically significant effect of work stress on colorectal cancer risk was observed in North America (RR = 1.51, 95% CI: 1.23–1.86, but not significant in Europe (RR = 1.16, 95% CI: 0.90–1.48). By contrast, a significant association between work stress and esophagus cancer was found in Europe, but not in North America. In addition, we did not observe any association between work stress and the risk of prostate, breast, or ovarian cancers. Findings of our study show that work stress is an important risk factor for colorectal, lung, and esophagus cancers. General public should be aware of the increased risk of cancer in employers with work stress. More efforts should be focused on understanding and studying the potential mechanisms which would help to identify employees at higher risk of these cancers.     

经皮辅助关节囊入路治疗老年股骨颈骨折的早期疗效

目的探讨经皮辅助关节囊(SuperPATH)微创入路初次人工股骨头置换术治疗老年股骨颈骨折的可行性及早期疗效。 方法回顾性分析2015年10月年2016年11月期间，在仪征市人民医院骨科严格按照纳入和排除标准收集的老年股骨颈骨折，采用SuperPATH微创入路初次人工股骨头置换，共纳入患者21例，其中男5例，女16例；左髋6例，右髋15例；平均年龄为(74±9)岁。观察切口长度、手术时间、术中出血量及并发症等情况。采用髋关节Harris评分标准评定术前、术后3 d及术后3个月患髋功能。计量资料用W检验观察数据是否成正态分布；髋关节Harris评分采用重复测量的方差分析比较，组间两两比较采用t检验。 结果21例患者均获3～6个月随访。手术切口平均长度(7.0±1.5)cm，住院平均时间(9.6±1.8)d，手术平均时间(64±13)min，术中平均出血量(138.7±30.5)ml，下床负重活动平均时间(2.4±0.8)d。患者随访期限内均未发生皮肤坏死、感染、骨折、深静脉血栓(DVT)、关节脱位及下肢不等长等严重并发症。术后3 d患侧髋关节Harris评分平均为(67.3±6.3)分，与术前(12.1±4.3)分比较差异有统计学意义(t＝23.132，P<0.05)；术后3个月患侧髋关节Harris评分平均为(84.7±4.5)分，与术后3 d比较差异有统计学意义(t＝9.075，P<0.05)。 结论SuperPATH微创入路初次人工股骨头置换术治疗老年股骨颈骨折早期疗效有明显优势，具有创伤小、切口小、出血少、术后疼痛轻、可早期下床、患者满意度高，能降低术后关节脱位等并发症，符合微创外科和快速康复外科的发展理念。     

超声引导腹横肌平面阻滞联合喉罩全身麻醉在小儿疝囊高位结扎术的镇痛效果

目的探究超声引导下腹横肌平面阻滞联合喉罩全麻下小儿疝囊高位结扎术的镇痛效果。 方法选取2016年1月至2018年1月，湖北省洪湖市人民医院150例接受疝囊高位结扎术的患儿，随机分为观察组（75例）和对照组（75例）。对照组采用单纯喉罩全身麻醉，而观察组在对照组基础上进行超声引导下腹横肌平面阻滞。比较2组患儿的平均动脉压（MAP）、心率（HR）、躁动及疼痛评分、苏醒时间、手术时间及并发症发生状况。 结果观察组的并发症发生率（6.7%）低于对照组（17.3%），差异有统计学意义（P<0.05）。观察组患儿手术时间、苏醒时间、躁动评分、12 h小儿疼痛量表（12 h FLACC）评分均低于对照组（P<0.05）。观察组插入喉罩后、手术开始时、拔除喉罩时与麻醉诱导前比较，MAP、HR差异均无统计学意义（P>0.05）；对照组插入喉罩后、拔除喉罩时与麻醉诱导前比较，MAP、HR差异均无统计学意义（P>0.05），手术开始时MAP、HR高于麻醉诱导前（P<0.05）。麻醉诱导前、插入喉罩后、拔除喉罩时2组间的MAP、HR差异均无统计学意义（P>0.05），手术开始时，观察组的MAP、HR均低于对照组（P<0.05）。 结论小儿疝囊高位结扎术中应用超声引导下腹横肌平面阻滞联合喉罩全麻的麻醉效果较好，术后苏醒快，可以缓解患儿术后疼痛及躁动，降低并发症的发生率，具有临床应用价值。     

ZBTB7/miR-137 Autoregulatory Circuit Promotes the Progression of Renal Carcinoma

Renal carcinoma greatly threatens human health, but the involved molecular mechanisms are far from complete understanding. As a master oncogene driving the initiation of many other cancers, ZBTB7 has not been established to be associated with renal cancer. Our data revealed that ZBTB7 is highly expressed in renal carcinoma specimens and cell lines, compared with normal cells. The silencing of ZBTB7 suppressed the proliferation and invasion of renal cancer cells. ZBTB7 overexpression rendered normal cells with higher proliferation rates and invasiveness. An animal study further confirmed the role of ZBTB7 in the growth of renal carcinoma. Moreover, miR-137 was identified to negatively regulate the expression of ZBTB7, and its abundance is inversely correlated with that of ZBTB7 in renal carcinoma specimens and cell lines. ZBTB7 overexpression may be induced by miR-137 downregulation. Interestingly, ZBTB7 can also suppress miR-137 expression by binding to its recognition site within the miR-137 promoter region. Taken together, we identified an autoregulatory loop consisting of ZBTB7 and miR-137 in gastric cancers, and targeting this pathway may be an effective strategy for renal carcinoma cancer therapy.     

Expression and prognostic value of FOXP1 in esophageal squamous cell carcinoma

BackgroundForkhead box protein P1 (FOXP1) has been suggested as a prognostic marker in several malignant tumors. However, the significance of FOXP1 in esophageal squamous cell carcinoma (ESCC) is still unclear. The purpose of this study was to investigate the expression pattern of FOXP1 in normal esophageal tissue and ESCC and to analyze the clinicopathological significance and prognostic value of FOXP1 in ESCC.MethodsFOXP1 was detected by immunohistochemistry using tissue microarrays containing tumor tissues and adjacent normal tissues from 270 ESCC patients with oncological follow-up data.ResultsNormal esophageal tissues predominantly showed an exclusive nuclear FOXP1 (n-FOXP1) expression pattern, and no exclusive cytoplasmic FOXP1 (c-FOXP1) staining was found. In ESCC, the expression rates of exclusive n-FOXP1-positive, exclusive c-FOXP1-positive, both nuclear and cytoplasmic positive and complete negative were 14.4%, 28.9%, 10.4% and 46.3%, respectively. High n-FOXP1 expression was significantly correlated with decreased postoperative recurrence and distant metastasis (P < 0.05). Furthermore, elevated c-FOXP1 expression was significantly associated with regional lymph node metastasis and distant metastasis (P < 0.05). High c-FOXP1 expression had an effect on shorter overall survival (OS) time, but the difference was not statistically significant (P > 0.05). Kaplan–Meier analysis showed that ESCC patients with high n-FOXP1 expression survived significantly longer than patients with low n-FOXP1 expression. Multivariate analysis confirmed that patients with high n-FOXP1 staining exhibit good prognosis and n-FOXP1 was an independent factor for ESCC prognosis.ConclusionsOur results suggest that FOXP1 plays an essential role in ESCC progression and prognosis and may be a useful biomarker for predicting survival.