Identification of DAPI-stained normal,inflammatory, and carcinoma hepatic cells based on hyperspectral microscopy

Gross chromatin imbalance and high DNA content are distinct features of various types of cancer cells. However, severe inflammation can also produce similar symptoms in cells. In this study, normal, inflammatory, and carcinoma hepatic cells were stained with 4’,6-diamidino-2-phenylindole (DAPI) and investigated by hyperspectral microscopy. DAPI is a DNA-sensitive fluorochrome. Therefore, the differences in the cellular DNA of the samples can be revealed by the corresponding fluorescence. Our experimental results demonstrate that although chromosomal disorder and high DNA content both occur in severely inflammatory and carcinoma hepatic cells, there is still a slight difference in their DNA, making their fluorescent intensity and even their spectral shapes distinguishable. Based on these spectral features, we developed a method for the precise identification of normal, inflammatory, and carcinoma hepatic cells in the field of view. The identification accuracy for these three types of cells was 99.8%. We believe that examination that combines DAPI staining with hyperspectral microscopy is a potential method for the identification and investigation of various types of cancer tissues.     

30 d-6°头低位卧床对人下肢脂肪体积的影响

目的 观察模拟失重对人下肢脂肪体积的影响,验证磁共振水脂分离成像技术在测量人下肢脂肪容积中的可行性.方法 14名男性健康志愿者,-6°头低位卧床30 d,使用磁共振水脂分离成像(Dixon)技术采集卧床前后的下肢横断面解剖图像,测量卧床前后下肢脂肪体积.结果 与卧床前相比,卧床后所有志愿者下肢总脂肪体积及大腿段脂肪体积显著增加(P＜0.001);小腿段脂肪体积呈增加趋势,但无统计学差异(P＞0.05).结论 使用MRI水脂分离成像可以清晰地显示卧床前后下肢脂肪体积的变化;-6°头低位卧床30 d后下肢脂肪体积明显增加.     

彩色多普勒超声对医源性股动脉假性动脉瘤的临床应用

目的：探讨彩色多普勒超声对医源性股动脉假性动脉瘤的诊断及治疗价值。方法对22例经皮股动脉穿刺介入术后触及搏动性肿块的患者采用二维超声、彩色多普勒超声、频谱多普勒超声检查,对声像图进行总结分析,在超声引导下压迫及注射治疗。结果本组22例假性动脉瘤彩色多普勒超声诊断与临床符合率100%（22/22）,18例经超声引导下压迫治疗后瘤腔闭合,3例经瘤腔内注射凝血酶治疗取得满意疗效,总治愈率95%（21/22）,1例行外科手术治疗。结论彩色多普勒超声是医源性假性动脉瘤首选的诊断及治疗方法。     

脊髓损伤尿潴留患者无创护理干预研究进展

尿潴留是脊髓损伤患者常见的并发症之一,目前对尿潴留缺乏有效的治疗,临床上主要采用留置导尿管引流尿液,被动等待膀胱功能的恢复。由于导尿易致尿道黏膜损伤,尿道附近及尿道内存在的细菌可经损伤的黏膜进入机体,引起上行感染;通过无创护理干预来解决患者的尿潴留问题显得尤为重要,本文从促进排尿和膀胱功能训练两方面,综述了脊髓损伤患者尿潴留的无创护理干预进展。     

全胸腔镜下胸腺扩大切除术治疗重症肌无力

目的 评价全胸腔镜下胸腺扩大切除术治疗重症肌无力的临床价值.方法 2005年3月～2009年10月,86例重症肌无力患者在全胸腔镜下行经右胸胸腺扩大切除术,男性39例,女性47例,平均年龄(33.5±7.5)岁.切除范围包括胸腺组织及前上纵隔的脂肪组织.结果 全组手术均获成功,无1例中转开胸,平均手术时间(96±25)min,术中平均出血量(62±26)mL,术后平均住院时间为(7.2±2.5)d,术后发生重症肌无力危象4例,经过机械通气和对症治疗后好转.术后病理示胸腺增生28例、胸腺瘤15例、胸腺囊肿3例、萎缩胸腺26例、正常胸腺14例.86例均获随访,随访时间6～60个月,完全缓解27例(31.4％),部分缓解45例(52.3％),稳定11例(12.8％),恶化3例(3.5％),总缓解率83.7％.结论 全胸腔镜下胸腺扩大切除术治疗重症肌无力技术可行、疗效可靠,具备微创和恢复迅速的优势.     

Construction of AP003469.4-miRNAs-mRNAs ceRNA network to reveal potential biomarkers for hepatocellular carcinoma

Studies have reported that the competing endogenous RNA (ceRNA) networks are related to disease progression and prognosis in patients with hepatocellular carcinoma (HCC). The roles and mechanisms of long-chain non-coding RNA AP003469.4 in HCC have remained unclear. Here, we explored the roles of AP003469.4 in HCC progression using bioinformatics, CCK-8, Transwell assay, etc. AP003469.4 targets miRNAs and these target genes were predicted by the LncBase Predicted v.2, miRDB, miRTarBase, and TargetScan databases. Then, AP003469.4-associated ceRNA network was constructed. Biological functions and mechanisms of differentially expressed genes in the ceRNA network were explored using GO and KEGG. Survival analysis and Cox regression analysis were used to screen prognostic genes and construct a prognostic risk model. The results revealed that AP003469.4, with the area under the curve of 0.9048, was highly expressed in HCC tissues. Increased expression of AP003469.4 was an independent risk factor for the dismal prognosis of HCC patients and was associated with the short overall and disease-free survival. Downregulation of AP003469.4 expression inhibited cell proliferation, cycle transition, invasion, and migration, and promoted cell apoptosis. There were 489 differentially expressed target genes in the ceRNA network, which were involved in several pathways, such as the MAPK signaling pathway, cell cycle, and p53 signaling pathway. The risk model was based on the DTYMK, ZFC3H1, CBX2, PKM, TTC26, ATG10, TAGLN2, CD3EAP, SHISA9, SLC1A5, KPNA2, SCML2, E2F7, and SMARCD1, which were the independent risk factors for poor prognosis of HCC patients. In general, interference with AP003469.4 expression might delay the progression of HCC. AP003469.4 related network could help to identify the hub target molecules in HCC progression, which might be candidate biomarkers for evaluating the prognosis of HCC patients.     

稳定(牙合)垫治疗对颞下颌关节腔内压力的影响

目的:通过测量戴稳定(牙合)垫前、后颞下颌关节腔内压力的变化,检验稳定(牙合)垫治疗对颞下颌关节腔内压力的影响.方法:用自行开发的多导颞下颌关节腔内压力测试仪,对22例患者进行戴稳定(牙合)垫前、后的颞下颌关节腔内压力穿刺测量,直接获取关节腔内的压力数值,并对戴稳定(牙合)垫前、后正中咬合和大张口状态下的压力数值用配对t检验进行统计比较分析.结果:戴稳定(牙合)垫前正中咬合和大张口状态的颞下颌关节腔内压力分别是(61.3±48.5)mm Hg(1 mm Hg=0.133 kPa)和负压(33.2±34.2)mm Hg;戴稳定(牙合)垫后正中咬合和大张口状态的颞下颌关节腔内压力为(39.5±24.5)mm Hg柱和负压(36.3±25.3)mm Hg.正中咬合状态下的戴稳定(牙合)垫后关节腔内压力值小于戴稳定(牙合)垫前压力值,两者比较差异有统计学意义(P＜0.05);大张口状态下的压力数值在戴稳定(牙合)垫前、后差异没有统计学意义(P＞0.05).结论:戴稳定(牙合)垫能降低正中咬合状态下颞下颌关节腔内压力.     

三叶因子1与食管鳞癌新生血管形成的关系

),食管癌MVD水平高于癌旁组织(P＜0.01).结论 TFF1可能通过上调VEGF表达促进食管鳞癌新生血管的形成.     

《中药鉴定学》创新性实验方法探讨研究——贵州省道地药材天麻、杜仲、吴茱萸的真伪鉴定与质量评价

目的：探索生药学创新性的实验方法及培养学生的创新思维、动手能力和团队协作精神的作用。方法：在教师的指导下,成立3个学生课题小组,分别选取贵州道地药材药材天麻、杜仲、吴茱萸,通过文献查阅与综述、药材市场调查与样品收集、药材鉴定、质量评价、实验记录与报告书写等完成相应的研究工作。结果：学生掌握了如何进行文献查阅与综述,如何开展药材市场调查,怎样收集到合格的药材,如何制定实验方案,物资准备包括哪些内容,选用什么样的性状、显微、理化鉴定方法对药材进行鉴定,如何评价中药的质量,如何正确书写实验记录与报告。结论：通过具体的实验项目使学生了解进行中药品种鉴定与质量评价的基本思路、方法与程序;通过与本学科课堂理论学习结合,增加学生学习兴趣,提高学生参与科学实验的积极性,培养学生的创新思维;通过实验过程的全程参与,特别是样品收集、物资准备和实验操作的锻炼,学生的动手能力普遍提高;通过课题小组的分工与协作,锻炼学生独立从事及完成一项任务的能力,改善学生之间、学生与社会之间沟通及协作能力。     

气相色谱-质谱法同时测定8种食欲抑制剂的方法研究

目的建立气相色谱-质谱联用仪去甲伪麻黄碱、芬氟拉明、伪麻黄碱、安非拉酮、咖啡因、西布曲明、克罗帕米和士的宁等8种食欲抑制剂的定性和定量分析方法。方法采用KOH NaCl、甲醇调节液固两相对待测物的作用力,提高氯仿萃取率,应用气相色谱-质谱联用仪测定。结果检测8种食欲抑制剂的相关系数r值均在0.9 983～0.9 996之间,检出限均在0.001mg/kg～0.5mg/kg之间,回收率均在70.67%～116.08%之间,精密度均在1.00%～5.40%之间。结论该方法灵敏、准确,适用于保健品中对此8种药物的确证分析和定量分析。