两种方法测定血清白蛋白的临床应用评价

目的分析电泳法和溴甲酚绿法检测白蛋白及白蛋白/球蛋白比值的相关性。方法本院健康体检人员及相关疾病人员102例,采用Helena全自动电泳仪和日立7600-020全自动生化分析仪分别进行测定,得出总蛋白、白蛋白及A/G比值,对上述结果进行相关性分析。结果溴甲酚绿法与电泳法进行比较:健康组ALB及A/G相关系数r分别为0.98、0.97,(P>0.05);肝病组ALB及A/G相关系数r分别为0.90、0.91(P>0.05);肾病组ALB及A/G相关系数r分别为0.74、0.73(P<0.05);多发性骨髓瘤组ALB及A/G相关系数r分别为0.52、0.55(P<0.05)。结论对健康人和肝病患者两种方法检测白蛋白有相关性,电泳法依据物理性质分离蛋白质,结果更具客观性,在肾病和多发性骨髓瘤病人的测定结果更加稳定可靠。     

铜绿假单胞菌耐碳青酶烯类抗菌药物机制分类检测的研究

目的研究铜绿假单胞菌(PA)耐碳青酶烯类抗菌药物机制的分布。方法应用复合纸片法检测47株临床分离的耐碳青酶烯类抗菌药物PA临床分离株,据表型推测其耐药机制并分析其分布。结果产金属酶、D2缺失、外排泵出分别占29.8%、31.9%、31.9%,产其他β-内酰胺酶占6.4%。结论产金属酶是PA耐碳青酶烯类抗菌药物最主要机制之一,准确的实验室检测不仅可以帮助临床合理选用抗菌药物并可减少细菌耐药性的传播。     

非常规分割放射治疗的放射生物学基础与临床应用

如何进一步提高肿瘤的放疗疗效是放射临床医师及放射生物学家长期以来密切关注的问题。在放射生物学对放疗的时间、剂量、分割次数深入研究基础上,20世纪70年代开始提出了多种非常规分割的放疗方法,如超分割放疗（HRT）、加速超分割放疗（HART）,包括连续加速超分割放疗（CHART、CHART—WEL）、同时小野加量加速超分割放疗（CBHART）、分段加速超分割放疗（SCHART）、后程加速超分割放疗（LCHART）、逐步增量加速超分割放疗（EHART）等和连续加速常规分割放疗（CAIR）,并在临床应用中取得了明显的治疗效果。     

Development of a Flexible Metamaterial Film with High EM Wave Absorptivity by Numerical and Experimental Methods

The present study is intended to develop and test a cost-effective and efficient printing method for fabricating flexible metamaterial film with high electromagnetic wave absorptivity. The film can be easily applied to the surfaces with curved aspects. Firstly, numerical parametric study of the absorption characteristics of the film is performed for the range of frequency varying from 2.0 to 9.0 GHz based on commercial software package. Secondly, the flexible metamaterial films are fabricated, and experiments are conducted. The flexible metamaterial film consists of a flexible dielectric film made of polyimide (PI) and an array of split-ring resonators. The split-ring resonators of different geometric dimensions are fabricated on the PI film surface by using a silver nanoparticles ink jet printer. The performance of the flexible structure is then measured and dependence of operation frequency with higher absorptivity on the dimensions of the split-ring resonators is investigated. A comparison between the numerical and experimental data shows that the numerical predictions of the operation frequency with higher absorptivity closely agree with the experimental data.     

Association of Vitamin D in Different Trimester with Hemoglobin during Pregnancy

The association between vitamin D and hemoglobin has been suggested. Vitamin D can affect erythropoiesis by the induction of erythroid progenitor cell proliferation and enhance iron absorption by regulating the iron-hepcidin-ferroportin axis in monocytes. However, this relationship in pregnant women is scarce. The purpose of this study was to investigate the association between plasma vitamin D levels with hemoglobin concentration in pregnant women considering each trimester and iron supplementation. The data were obtained from Zhoushan Pregnant Women Cohort, collected from 2011 to 2018. Plasma 25(OH)D was measured in each trimester using liquid chromatography–tandem mass spectrometry. Generalized estimating equations and multiple linear regressions were performed. Finally, 2962 pregnant women and 4419 observations in the first trimester were included in this study. Plasma 25(OH)D in first trimester (T1) (β = 0.06, p = 0.0177), second trimester (T2) (β = 0.15, p < 0.0001), and third trimester (T3) (β = 0.12, p = 0.0006) were positively associated with Hb. Association between plasma 25(OH)D levels in T1 and Hb concentration was positively associated with gestational age (β = 0.005, p = 0.0421). Pregnant women with VD deficiency in T1 (OR = 1.42, 95% CI: 1.07–1.88) or T2 (OR = 1.94, 95% CI: 1.30–2.89) presented an increased risk of anemia, compared with women without VD deficiency. Moreover, the significant relationship between VD and Hb was only observed among women with iron supplementation during pregnancy. Plasma 25(OH)D levels in each trimester were positively associated with Hb concentration. Iron supplementation might be an important factor affecting the relationship between VD and Hb.     

Research Progress on Emerging Viral Pathogens of Small Ruminants in China during the Last Decade

China is the country with the largest number of domestic small ruminants in the world. Recently, the intensive and large-scale sheep/goat raising industry has developed rapidly, especially in nonpastoral regions. Frequent trading, allocation, and transportation result in the introduction and prevalence of new pathogens. Several new viral pathogens (peste des petits ruminants virus, caprine parainfluenza virus type 3, border disease virus, enzootic nasal tumor virus, caprine herpesvirus 1, enterovirus) have been circulating and identified in China, which has attracted extensive attention from both farmers and researchers. During the last decade, studies examining the etiology, epidemiology, pathogenesis, diagnostic methods, and vaccines for these emerging viruses have been conducted. In this review, we focus on the latest findings and research progress related to these newly identified viral pathogens in China, discuss the current situation and problems, and propose research directions and prevention strategies for different diseases in the future. Our aim is to provide comprehensive and valuable information for the prevention and control of these emerging viruses and highlight the importance of surveillance of emerging or re-emerging viruses.     

PPAR-γ配体抑制胆管癌的体内有效作用途径实验研究

目的探讨PPAR-γ(peroxisome proliferactor-activated receptor gamma,PPAR-γ)配体罗格列酮(rosiglitazone,RGZ)抑制胆管癌的体内有效作用途径。方法采用不同RGZ给药方法和途径对胆管癌细胞系QBC939荷瘤裸鼠进行干预,7d后处死,测量瘤体体积和重量,计算各组肿瘤生长抑制率。结果RGZ对胆管癌细胞有明显的增殖抑制作用,连续多次灌胃组[12mg/(kg.d)](临床途径组)抑制作用明显,而单次灌胃组、单次与多次腹腔灌注组抑制作用均不明显。统计学处理,连续多次灌胃组与其他给药途径比较,P<0.05,有统计学意义;而其他方法与对照组比较,P>0.05,无统计学意义。结论连续多次给药法是PPAR-γ配体RGZ对胆管癌有效抑制作用方法之一。     

苏州地区2011-2019年儿童细菌性脑膜炎病原分布及耐药性分析

目的:探讨苏州地区细菌性脑膜炎患儿病原构成及耐药性。方法:回顾性分析2011-2019年在苏州大学附属儿童医院住院的细菌性脑膜炎患儿脑脊液培养结果,总结不同年龄段患儿的病原分布特点及耐药情况。结果:535例患儿中,162例脑脊液细菌培养阳性,阳性率为30.3%;菌种主要为肺炎链球菌42株(25.9%)、无乳链球菌39株(24.1%)、大肠埃希菌36株(22.2%)等。>1～3岁组阳性率为53.6%,均高于其他各年龄组(P均<0.05)。革兰阴性杆菌组的患儿年龄与革兰阳性球菌组、革兰阳性杆菌组比较差异均有统计学意义(P<0.05),年龄越小越容易感染革兰阴性杆菌。新生儿组以无乳链球菌和大肠埃希菌为主,29 d～1岁组病原种类较多,多见肺炎链球菌、无乳链球菌和大肠埃希菌,而>1岁患儿以肺炎链球菌为主。脑脊液培养前使用过抗菌药物的患儿细菌检出阳性率低于未使用过抗菌药物的患儿(P<0.05)。药敏试验显示,肺炎链球菌及无乳链球菌对万古霉素、利奈唑胺敏感率达100%;肺炎链球菌对青霉素的耐药率较高,为85.7%;大肠埃希菌对氨苄西林、头孢噻肟、头孢曲松的耐药率分别为...     

糖皮质激素及其胞浆受体拮抗剂对凋亡嗜酸粒细胞转归的影响

目的探讨糖皮质激素及糖皮质激素胞浆受体拮抗剂RU38486对A549细胞吞噬凋亡的嗜酸粒细胞的影响。方法．CD15 的嗜酸粒细胞体外培养48 h老化凋亡后加入到预先用地塞米松或RU38486干预的A549细胞中进行吞噬,光镜下对已固定染色的细胞进行吞噬率统计。放射免疫法检测A549细胞上清中白介素6和白介素8水平。结果A549细胞在地塞米松诱导后1 h吞噬能力开始升高,4 h达最高峰;加入RU38486后抑制了地塞米松所增强的吞噬能力。结论地塞米松促进A549细胞吞噬凋亡的嗜酸粒细胞是通过A549细胞糖皮质激素胞浆受体发挥作用的。