CR影像板感光性能与成像次数相关性研究

目的 研究IP板曝光性能与使用期限的关系.材料和方法将不同使用期限的三组IP板分别用75KV,40mAs,115cm焦-片距及活动滤线器进行铝梯曝光;并统一选择相同部位及照射等级用CR系统扫描,最后在不经任何后处理的情况于同一时段内用激光打印机打印冲洗,分别测量各铅梯密度值,并计算出各组平均值及标准差.结果 3组IP板灰度等级平均值经χ2检验,无统计学差异(P>0.05).结论 IP板在使用近万次时,其感光性能未有明显变化,在这一阶段,影响IP板使用寿命的不是PSL物质的性能衰减,而是实际应用中发生的IP板机械损伤.     

钙对用克山病病区粮喂养大鼠甲状旁腺激素降钙素以及生长激素分泌的影响

用模仿克山病病区易感人群膳食组成的病区粮偏食喂养大鼠，观察在该饲料中补充不同浓度的钙对大鼠内分泌及生长代谢的影响。结果表明：病区粮偏食明显低钙，仅为常规食的１／３２；用该饲料喂养的大鼠体重增长缓慢；血清总钙及血浆钙离子水平明显降低，仅约为常规食组动物的一半左右，血Ｐ升高；血清甲状旁腺激素（ＰＴＨ），降钙素（ＣＴ）和生长激素（ＧＨ）水平均明显降低，与常规食组比，均为Ｐ＜０．０１。补Ｃａ后随血清Ｃａ增加，血清ＰＴＨ、ＣＴ和ＧＨ均明显升高而接近常规食组水平。这说明钙对用克山病病区粮喂养大鼠的内分泌功能及生长代谢具有一定的调节作用，从而改善了用病区粮喂养大鼠引起的代谢偏移。     

湿润烧伤膏联合龙血竭防治乳腺癌改良根治术后放射性皮肤损伤疗效观察

目的对比分析湿润烧伤膏联合龙血竭防治乳腺癌改良根治术后放射性皮肤损伤的临床疗效。方法将2015年8月至2018年8月临沂市第三人民医院收治的120例乳腺癌改良根治术后行放射治疗的患者按照治疗方法分为观察组(60例)、对照1组(30例)与对照2组(30例),观察组患者放射治疗后照射区域皮肤均匀涂抹湿润烧伤膏,出现Ⅱ~Ⅳ级放射性皮肤损伤时加用龙血竭粉末外敷;对照1组患者放射治疗后照射区域皮肤均匀涂抹湿润烧伤膏,出现Ⅱ~Ⅳ级放射性皮肤损伤时继续应用湿润烧伤膏换药治疗;对照2组患者放射治疗后照射区域皮肤不采取防护措施,出现Ⅱ~Ⅳ级放射性皮肤损伤时予以碘伏常规换药治疗。对比观察3组患者放射性皮肤损伤发生情况、放射治疗中断情况及临床疗效结果放射治疗20 Gy、40 Gy及结束后,3组患者皮肤损伤发生情况对比,χ~2=59.417、94.876、29.072,P均=0.000,差异具有统计学意义,且对照2组患者皮肤损伤发生情况较观察组及对照1组严重(放射治疗20Gy后:χ~2=41.918、23.721,P均=0.000;放射治疗40 Gy后:χ~2=74.118、47.368,P均=0.000;放射治疗结束后:χ~2=61.606、30.610,P均=0.000),而观察组与对照1组患者皮肤损伤发生情况无明显差异(P均>0.05)。放射治疗过程中,对照2组中有7例患者因放射性皮肤损伤中断治疗,明显高于观察组与对照1组均无患者中断治疗(χ~2=15.181、7.925,P=0.000、0.005)。放射治疗结束后2周,观察组患者的临床疗效明显优于对照1组及对照2组(χ~2=6.923、24.761,P=0.009、0.000),而对照1组患者的临床疗效明显优于对照2组(χ~2=8.324,P=0.016)。结论湿润烧伤膏联合龙血竭可有效防治乳腺癌改良根治术后放射性皮肤损伤,促进放射性皮肤损伤创面愈合,避免放射治疗中断,且操作简便,值得临床推广应用。     

高血压脑出血术后死亡相关因素分析

目的探讨高血压脑出血手术后死亡的相关因素。方法回顾性分析66例高血压脑出血病人术前的血压、血糖、尿素氮、肌酐与术后生存的关系,并进行统计比较。同时,按年龄分组．比较两组的死亡率。结果死亡组病人的各项指标与生存组相比均有明显差异。〉60岁者死亡率明显高于〈60岁者（x^2=7．48,P=0．006）。结论病人的年龄、血压、血糖、血尿素氮和肌酐与高血压脑出血术后病人的死亡有密切关系,控制这些风险因素是降低死亡率的关键。     

An inactivated recombinant rabies CVS-11 virus expressing two copies of the glycoprotein elicits a higher level of neutralizing antibodies and provides better protection in mice

The rabies virus (RABV) G protein is the primary contributor to the pathogenicity and protective immunity of RABV. In this study, we generated a recombinant rCVS-11-G strain containing two copies of the G protein derived from the pathogenic wild-type (wt) CVS-11 strain and based on its infectious clone. Compared with the wtCVS-11 strain, the rCVS-11-G strain possessed a larger virion and 1.4-fold more G protein, but it exhibited a similar growth property to the rCVS-11 strain, including passaging stability in vitro. qPCR results showed that the two G genes were over-expressed in BHK-21 cells infected with the rCVS-11-G strain. However, the rCVS-11-G strain presented an 80 % lower LD₅₀ than the wtCVS-11 strain when intracranially (i.c.) inoculated in adult mice. Adult mice that were either intracranially (i.c.) or intramuscularly (i.m.) inoculated with rCVS-11-G strain developed more acute neurological symptoms and greater mortality than those inoculated with the wtCVS-11 strain. Furthermore, the rCVS-11-G strain was more easily and rapidly taken up by neuroblastoma cells. These data indicated that the rCVS-11-G strain might have increased neurotropism because of the over-expression of the pathogenic G protein. The inactivated rCVS-11-G strain induced significantly higher levels of virus neutralization antibodies and provided better protection from street rabies virus challenge in mice. Therefore, the rCVS-11-G strain may be a promising inactivated vaccine strain due to its better immunogenicity.     

Parkin localizes to the Lewy bodies of Parkinson disease and dementia with Lewy bodies

Mutations in alpha-synuclein (alpha S) and parkin cause heritable forms of Parkinson disease (PD). We hypothesized that neuronal parkin, a known E3 ubiquitin ligase, facilitates the formation of Lewy bodies (LBs), a pathological hallmark of PD. Here, we report that affinity-purified parkin antibodies labeled classical LBs in substantia nigra sections from four related human disorders: sporadic PD, inherited alphaS-linked PD, dementia with LBs (DLB), and LB-positive, parkin-linked PD. Anti-parkin antibodies also detected LBs in entorhinal and cingulate cortices from DLB brain and alphaS inclusions in sympathetic gangliocytes from sporadic PD. Double labeling with confocal microscopy of DLB midbrain sections revealed that approximately 90% of anti-alpha S-reactive LBs were also detected by a parkin antibody to amino acids 342 to 353. Accordingly, parkin proteins, including the 53-kd mature isoform, were present in affinity-isolated LBs from DLB cortex. Fluorescence resonance energy transfer and immunoelectron microscopy showed that alphaS and parkin co-localized within brainstem and cortical LBs. Biochemically, parkin appeared most enriched in cytosolic and postsynaptic fractions of adult rat brain, but also in purified, alpha S-rich presynaptic elements that additionally contained parkin's E2-binding partner, UbcH7. We conclude that parkin and UbcH7 are present with alphaS in subcellular compartments of normal brain and that parkin frequently co-localizes with alpha S aggregates in the characteristic LB inclusions of PD and DLB. These results suggest that functional parkin proteins may be required during LB formation.     

红花化瘀汤熏洗治疗膝关节镜术后康复效果及对患者疼痛和膝关节功能的影响

目的:探讨红花化瘀汤熏洗在膝关节镜术后康复中的临床效果及对患者疼痛和膝关节功能的影响。方法:选择膝关节镜手术患者104例为研究对象,随机数字表分为对照组和观察组各52例。对照组术后给予常规方法治疗,观察组在对照组基础上联合红花化瘀汤熏洗治疗。治疗8周后,比较两组治疗效果、VAS评分、膝关节功能及炎症因子。结果:两组术后2周、4周、6周及8周膝关节肿胀度均小于术前(P<0.05);但观察组术后以上时间点膝关节肿胀度小于对照组(P<0.05);且观察组术后以上时间点VAS评分低于对照组(P<0.05);观察组术后8周疼痛、功能、活动度、畸形、肌力和稳定性评分高于对照组(P<0.05);观察组治疗后8周NO和IL-1β水平低于对照组(P<0.05),TGF-1β水平高于对照组(P<0.05)。结论:红花化瘀汤熏洗用于膝关节镜术后康复中能改善患者膝关节肿胀程度,减轻患者疼痛,提高患者膝关节功能,可降低炎症因子水平。     

盐酸洛美沙星滴耳剂稳定性研究

 目的:预测盐酸洛美沙星滴耳剂有效期，用以扩大洛美沙星的临床应用，增加耳科用药。方法:采用紫外分光光度法剧定制剂含重.用经典恒温法和Weibull概率法探讨其德定性。结果:紫外分光光度法测定制剂含量平均回收率为99.80% ,RSD为0.66%。经典恒温法预测本制剂在pH为5～6, 25 ℃ 贮存时有效期为5.16年，Weibull概率法预测其有效期为4.98年。结论:紫外分光光度法测定盐酸洛美沙星滴耳剂快速简便，精密度好，可靠性高。在无阳光直射条件下室温贮存本制剂稳定性好。