改良直肌移位联合内直肌后徙术治疗麻痹性内斜视

目的 探讨一种改良Hummelsheim术式治疗完全性外展神经麻痹所致内斜视的临床疗效.方法 对Hummelsheim及Jensen术式进行综合并加以改良后,为13例各种原因导致的外展神经麻痹患者施行该术式并同时行相应内直肌后徙术治疗.观察术后原在位眼位、代偿头位及复视的改善情况.随访期9～36月,平均11.4个月.结果 13例中,术后原在位眼位<+10△,11例代偿头位消失,达84.6%,术后1次矫正满意率为84.6%.随访期内未发现眼位回退现象.结论 改良的Hummelsheim术式是一种有效的治疗麻痹性内斜视的手术方法.     

呼吸道合胞病毒对Hep-2细胞增殖的影响

目的研究呼吸道合胞病毒(RSV)感染对细胞增殖活性的影响。方法培养RSV感染Hep-2细胞,观察细胞形态,在感染后不同时间点用四甲基偶氮唑盐(MTT)法检测Hep-2细胞增殖情况。结果RSV感染Hep-2细胞后48 h细胞开始出现病变,72~96 h病变最明显,120 h细胞全部死亡,不存在正常细胞。感染后24 h4、8 h、72 h9、6 h1、20 h Hep-2细胞的增殖指数分别为0.85,1.2,1.08,0.90,0.74。结论呼吸道合胞病毒感染早期促进宿主Hep-2细胞增殖,晚期抑制增殖。     

FQ-PCR方法检测女性CA患者HPV_(6、11)和HPV_(16、18)的实验研究

目的:探讨女性尖锐湿疣(CA)患者HPV6、11型和HPV16、18型的感染情况。方法:采用荧光定量聚合酶链反应(FQ-PCR)方法检测216例女性CA患者疣体组织或分泌物中的HPV6、11型和HPV16、18型。结果:HPV6、11型阳性率为94.91%(205/216),HPV16、18型阳性率为16.20%(35/216),HPV6、11型和HPV16、18型同时阳性的感染率为12.50%(27/216)。定量测定结果显示,HPV6、11型患者病毒载量最高1.0×108 copies/ml,最低2.8×103copies/ml;HPV16、18型患者病毒载量最高1.0×108 copies/ml,最低2.57×104 copies/ml。结论:FQ-PCR技术具有灵敏、简捷、安全、特异性强的特点,避免了单纯PCR扩增产生的假阳性。女性尖锐湿疣患者应用此方法检测HPV阳性率高,可以快速区分高危型及低危型的HPV感染,有助于对尖锐湿疣的复发和癌变作出可能性预测。     

北京市儿童手足口病与肠道病毒71型和柯萨奇病毒A组16型感染有关

目的了解2007年5-6月北京市儿童中流行的手足口病的病原。方法于2007年5、6月间采集来首都儿科研究所附属儿童医院门诊就诊的手足口病患儿咽拭子标本6份和1份病情危重的手足口病并发神经系统症状而急诊收住院患儿（编号F4243，年龄9岁8个月，女性）的经气管插管呼吸道抽吸液、脑脊液及血清标本。将咽拭子和气管插管抽吸液标本接种Hep-2、MDCK和Vero细胞进行病毒分离。同时设计位于肠道病毒5^＋非编码区（UTR）的通用引物2对（巢式PCR）、肠道病毒71型（EV71）VPl基因不同位置的特异性引物2对半（PCR和半巢式PCR）和柯萨奇病毒A组16型（CAl6）的特异性引物1对检测标本中的病毒核酸。首先用随机引物将标本中的RNA逆转录成cDNA，然后分别用上述引物进行PCR扩增肠道病毒5^＋UTR和EV71／CAl6的VPl基因片段；对EV71阳性的标本还扩增了VPl全基因，扩增产物直接进行序列测定和分析。结果6例门诊就诊的普通手足口病患儿和F4243的呼吸道标本中均扩增到肠道病毒5^＋UTR基因片段，有2例门诊患儿和F4243的标本中还扩增到EV71的VPl基因片段，提示该组手足口病患儿均为肠道病毒感染，其中3例为EV71感染。序列测定和分析表明有1例普通手足口病患儿（F4211）和F4243标本确定为EV71。所有标本接种Hep-2和MDCK细胞均未出现病变，说明常见的呼吸道病毒为阴性。除1份咽拭子标本（F4283）外，其余6份接种Vero细胞的标本均出现细胞病变。用肠道病毒通用引物和EV71特异性引物对分离到的病毒株核酸的扩增结果显示这6株病毒均为肠道病毒，其中F4211和F4243为EV71，与直接从呼吸道标本中扩增的结果相符；其余4株为CAl6。结论北京市儿童中流行的手足口病与肠道病毒EV71和CAl6感染有关；EV71可以在5岁以上儿童中引起严重的神经系统并发症，应引起注意。     

穿通性角膜移植术后的散光分析

目的分析穿通性角膜移植术后患者的屈光状态。方法对行穿通性角膜移植手术患者20例(20只眼)术后3个月行视力及散瞳验光检查。结果术后裸眼视力≤0.1者11只眼,其矫正视力为0.05~1.0;术后裸眼视力≥0.2者9只眼,其矫正视力为0.6~1.2。12只眼散光度数较大,其中轴位在垂直方向8只眼。结论穿通性角膜移植术可显著提高视力。多数病例有不同程度的大散光,其原因可能是6点和12点位置的缝线较紧,对局部角膜产生牵拉,造成了垂直轴位的散光。     

Inhibiting NF-κB increases cholesterol efflux from THP-1 derivedfoam cells treated with Angll via up-regulating the expression of ATP-binding cassette transporter A1

Objective:To study the role of nuclear factor-kappa B(NF- K B) in cholesterol efflux from THP-I derived-foam cells treated with Angiotensin Ⅱ (Ang Ⅱ ). Methods:Cultured THP-l derived-foam cells were treated with Ang Ⅱ or preincubated with tosyl-phenylalan inechloromethyl-ketone(TPCK) NF-K B inhibitor. The levels of activated NF-K B in the cells were examined by sandwich ELISA. Cellular cholesterol content was studied by electron microscopy scanning and zymochemistry via fluorospectrophotometer and cholesterol efflux was detected by scintillation counting technique. ABCAI mRNA and protein were quantified by RT-PCR and Western blotting. Results:Addition of TPCK to the cells before Ang Ⅱ stimulation attenuated the response of NF- K B p65 nuclear translocation induced by Ang Ⅱ and showed no peak in foam cells group and caused a reduction in cholesterol content and an increase in cholesterol effiux by 24.1%(P < 0.05) and 41.1%(P < 0.05) respectively, when compared with Ang Ⅱ group. In accordance, the ABCAl mRNA and protein were increased by 30% and 19%(P< 0.05) respectively, when compared with Ang Ⅱ group. Conclusion:Ang Ⅱ can down- regulate ABCAI in THP-l derived-foam cells via NF- K B, which leads to less cholesterol effiux and the increase of cholesterol content with the consequence of the promotion of atherosclerosis.     

浙江省HIV/AIDS未治疗人群耐药基因特征研究

目的：横断面了解浙江省未治疗人群耐药基因变异情况,补充耐药监测本底数据。方法：选取2004-2006年期间在各市县接受流行病学调查的104例未治疗HIV/AIDS感染者,对病毒载量高于最低检测限的99个样本进行HIV蛋白酶（PR）全长和部分逆转录酶（RT）基因区进行RT-PCR扩增测序。使用Stanford HIV Drug Resistance Database（ht-tp：//hivdb.stanford.edu）的在线耐药序列分析软件HIV DB进行序列分析,寻找耐药相关突变位点,并做出样本对各药物敏感性的结论。结果：扩增得到74份PI区序列,1份样本存在蛋白酶抑制剂（PIs）主要相关突变,耐药突变率为1.35%;得到83份RT区序列,4份样本存在逆转录酶抑制剂（RTIs）相关突变,耐药突变率为4.8%。总耐药突变率为6.02%（5/83）。结论：浙江省未治疗HIV感染者中耐药相关突变处于低流行状态。但具体感染者体内存在的PR和RT区主要耐药突变位点,会导致对抗病毒治疗药物不同程度的耐药,应该争取条件对治疗前病人进行基因型耐药检测。     

福建省开展预防人感染高致病性禽流感健康传播项目效果评价

目的评价在学校开展预防人感染高致病性禽流感健康传播项目效果，为预防和控制禽流感提供有益的经验。方法在项目县的学校开展干预活动后，对福建省项目县（区）项目实施小学958名小学生及非项目实施小学933名小学生进行调查比较。结果在被调查的1897名学生中，项目实施学校学生禽流感相关知识知晓率达到96％以上；在相关态度方面，有94．3％的学生认为发现病、死禽后应及时报告，有81．98％的学生认为接触禽类后出现发烧等情况应及时就医；在行为养成情况方面，有93．32％的学生表示与项目开展以前相比，洗手次数更多了，有92．48％的同学表示在处理禽类后洗手次数较以前更多了。同时项目实施学校学生在以上各方面均较非项目实施学校学生有明显的提高，并具有统计学差异（P〈0．05）。结论福建省预防人感染高致病性禽流感健康传播项目的实施，在小学生中效果明显，其方法值得推广。     

Moscatilin induces apoptosis in human colorectal cancer cells: a crucial role of c-Jun NH2-terminal protein kinase activation caused by tubulin depolymerization and DNA damage

PURPOSE: To study the effect of moscatilin (purified from the stem of orchid Dendrobrium loddigesii) on the proliferation of human colorectal cancer HCT-116 cells in vitro and in vivo. EXPERIMENTAL DESIGN: The growth inhibition of moscatilin was screened on several human cancer cell lines. The effect of moscatilin on tubulin was detected in vitro. Following moscatilin treatment on HCT-116 cells, c-Jun NH(2)-terminal protein kinase (JNK) and caspase activation was studied by Western blot analysis, and DNA damage was done by Comet assay. Specific JNK inhibitor SP600125 was cotreated to reverse moscatilin-induced apoptosis. Tumor growth inhibition of moscatilin was done on HCT-116 xenograft models. RESULTS: Moscatilin induced a time-dependent arrest of the cell cycle at G(2)-M, with an increase of cells at sub-G(1). Moscatilin inhibited tubulin polymerization, suggesting that it might bind to tubulins. Moscatilin also induced the phosphorylation of JNK1/2. SP600125 significantly inhibited the activation of caspase-9 and caspase-3 and the subsequent moscatilin-induced apoptosis. The data suggest that JNK activation may contribute to moscatilin-mediated apoptosis signaling. A parallel experiment showed that SP600125 significantly inhibits Taxol- and vincristine-induced HCT-116 cell apoptosis. This suggests that the JNK activation may be a common mechanism for tubulin-binding agents. Moreover, moscatilin induces DNA damage, phosphorylation of H2AX and p53, and up-regulation of p21. Our HCT-116 xenograft models show the in vivo efficacy of moscatilin. CONCLUSIONS: In summary, our results suggest that moscatilin induces apoptosis of colorectal HCT-116 cells via tubulin depolymerization and DNA damage stress and that this leads to the activation of JNK and mitochondria-involved intrinsic apoptosis pathway.     

Gene expression profiles in primary pancreatic tumors and metastatic lesions of Ela-<Emphasis Type="Italic">c-myc</Emphasis> transgenic mice

Background  

Pancreatic carcinoma usually is a fatal disease with no cure, mainly due to its invasion and metastasis prior to diagnosis. We analyzed the gene expression profiles of paired primary pancreatic tumors and metastatic lesions from Ela-c-myc transgenic mice in order to identify genes that may be involved in the pancreatic cancer progression. Differentially expressed selected genes were verified by semi-quantitative and quantitative RT-PCR. To further evaluate the relevance of some of the selected differentially expressed genes, we investigated their expression pattern in human pancreatic cancer cell lines with high and low metastatic potentials.