临沧市21年HIV/AIDS流行病学分析

目的分析临沧市艾滋病病毒感染者(HIV)/艾滋病病人(AIDS)的流行特征和变化趋势。方法对该市1990～2011年上报的HIV/AIDS的流行病学调查资料进行分析。结果该市累计报告HIV/AIDS 7 903例,其中AIDS 1 799例,死亡1 076例。报告病例以医疗机构筛查发现为主。感染途径以性传播为主,占53.8%;血液传播(注射吸毒传播)占31.2%;母婴传播占1.4%。结论该市因静脉吸毒人群共用注射器造成HIV感染,从2004年大筛查开始,每年新报告的人数在800～1 000例之间,性传播比例呈逐年持续上升,至2006年性传播已成为主要的传播途径,存在HIV向一般人群蔓延的危险,艾滋病疫情仍然严峻。     

应用3.0T高分辨率磁共振成像活体动态观测豚鼠内耳内淋巴液

目的探讨临床用3.0T磁共振成像系统能否在活体豚鼠区分内外淋巴液。方法5只豚鼠在3.0T磁共振下行内耳容积扫描后即刻颈内静脉注射钆喷酸葡胺（3ml/kg),注射后30分钟、60分钟、90分钟、120分钟、150分钟、180分钟、210分钟、240分钟行内耳容积扫描,观测内耳内外淋巴液成像变化。结果未注射对比剂前仅能显示耳蜗及前庭轮廓,尚不能区分内外淋巴液,注射30分钟后对比剂首先进入前庭及耳蜗底转及蜗顶,注射120分钟见对比剂扩展到全内耳并有较好的显像。结论临床用3.0T磁共振成像可区分豚鼠内外淋巴液,为研究膜迷路积水提供便利。     

幽门螺杆菌热休克蛋白A核酸疫苗的构建

目的 构建幽门螺杆菌(Hp)热休克蛋白A (HspA)亚单位核酸疫苗,为进一步研制Hp核酸多价疫苗提供技术平台.方法 以PMD-HspA为模板,扩增、纯化Hp hspA基因,插入到真核表达载体PcDNA3中,转化大肠埃希菌DH5a,经氨苄西林抗性筛选阳性克隆,得到重组核酸疫苗pcDNA3-HspA,用特异性PCR方法和小提质粒酶切电泳鉴定重组质粒,同时将pcDNA3-HspA进行测序,进一步确定是否构建成功及鉴定构建过程中是否发生基因突变.结果 PCR鉴定结果显示,扩增产物为0.36 kb的目的基因;酶切鉴定结果显示,得到5.45 kb克隆载体片段和0.36 kb的目的基因片段;重组质粒pcDNA3-HspA测序,得到基因全长357 bp目的基因片段,与克隆质粒测序图比较,无基因变异.结论 成功构建了Hp单价核酸疫苗pcDNA3-HspA,为研制Hp核酸多价疫苗奠定基础.     

卡介菌多糖核酸联合万乃洛韦治疗复发性生殖器疱疹30例疗效观察

目的探讨卡介菌多糖核酸联合万乃洛韦治疗复发性生殖器疱疹疗效。方法治疗组肌肉注射卡介菌多糖核酸注射液联合口服万乃洛韦,并设对照组仅口服万乃洛韦。结果治疗组人均年复发次数为1.4次,对照组人均年复发次数为2.7次,两组比率相比差异有显著性(χ2=11.5,P<0.01)。结论卡介菌多糖核酸联合万乃洛韦治疗复发性生殖器疱疹疗效满意。     

小鼠真皮间充质干细胞与成纤维细胞共培养对胶原分泌和TGF-β1表达的影响

Objective To explore the role of mouse dermis-derived mesenchymal stem cells (mdMSC) on skin repair. Methods mdMSC and human dermal fibroblasts were isolated and identified. Human dermal fibroblasts were cultured alone or eoeultured with mdMSC in Transwell chambers with the density ratio of human dermal fibroblasts to mdMSC being 2/5, 1/1, and 2/1. On day 4 and 8 of culture, the expression levels of hydroxyproline and transforming growth factor-beta (TGF-beta) 1 were measured in the supematant of monoculture and coculture by alkaline hydrolysis and ELISA respectively. Results The level of hydro-xyproline was significantly higher in the supematants of coculture system with a density ratio of 2/5 and 1/1 than that in monoculture supematants of human dermal fibroblasts on day 8 (both P < 0.05). Elevated level of TGF-betal was observed in all coculture supematants on day 8 (all P < 0.01) and in the supernatants of coculture system with a density ratio of 1/1 on day 4 (P < 0.05). There was no significant correlation between the expression level of TGF-betal and hydroxyproline in the coculture supernatants (r = 0.108, P ＞ 0.05). Conclusion In vitro coculture with mdMSC can increase the production of hydroxyproline and TGF-betal by fibroblasts, which may be a mechanism underlying the facilitation of skin repair by mdMSC.     

小鼠真皮间充质干细胞与成纤维细胞共培养对胶原分泌和TGF-β1表达的影响

Objective To explore the role of mouse dermis-derived mesenchymal stem cells (mdMSC) on skin repair. Methods mdMSC and human dermal fibroblasts were isolated and identified. Human dermal fibroblasts were cultured alone or eoeultured with mdMSC in Transwell chambers with the density ratio of human dermal fibroblasts to mdMSC being 2/5, 1/1, and 2/1. On day 4 and 8 of culture, the expression levels of hydroxyproline and transforming growth factor-beta (TGF-beta) 1 were measured in the supematant of monoculture and coculture by alkaline hydrolysis and ELISA respectively. Results The level of hydro-xyproline was significantly higher in the supematants of coculture system with a density ratio of 2/5 and 1/1 than that in monoculture supematants of human dermal fibroblasts on day 8 (both P < 0.05). Elevated level of TGF-betal was observed in all coculture supematants on day 8 (all P < 0.01) and in the supernatants of coculture system with a density ratio of 1/1 on day 4 (P < 0.05). There was no significant correlation between the expression level of TGF-betal and hydroxyproline in the coculture supernatants (r = 0.108, P ＞ 0.05). Conclusion In vitro coculture with mdMSC can increase the production of hydroxyproline and TGF-betal by fibroblasts, which may be a mechanism underlying the facilitation of skin repair by mdMSC.     

91株淋球菌的分离与对5种抗生素的药敏性测定分析

近年来,淋病的发病率有增加的趋势,淋球菌对常用抗生素的耐药菌株亦有所增加。为了配合临床对淋病的有效治疗,了解淋病双球菌对常用5种抗生素的敏感和耐药情况,我们进行了淋球菌的培养及药敏试验。现将我们所分离的91株淋病双球菌对5种抗生素进行的药敏测定结果报告如下:     

自锁托槽结合微种植钉矫治骨性Ⅱ类错颌

目的 探讨自锁托槽结合微种植钉在骨性Ⅱ类错颌矫治中的应用价值.方法 采用随机数字表法将36例骨性Ⅱ类错颌患者分成观察组和对照组各18例,分别予以自锁托槽+微种植钉矫治方案及直丝弓托槽+微种植钉矫治方案.观察比较两组患者矫治情况、疼痛及牙周健康指标评估结果差异,比较其矫治前后各软硬组织标志点与水平参照线、垂直参照线距离的测量值变化情况.结果 两组患者总矫治时间及有效复诊次数比较差异有统计学意义(P<0.05);观察组矫治期间椅旁操作时间明显短于对照组(P<0.05).矫治7 d时,两组患者数字分级法(NRS)评分均明显低于矫治1、3 d时(P<0.05),但各时间点组间比较差异无统计学意义(P>0.05).矫治后12个月时,两组患者牙松动度(T M)及牙龈指数(GI)均较矫治前无明显变化(P>0.05),菌斑指数(PLI)水平则较矫治前明显升高(P<0.05),上唇沟点、上唇缘点及颏唇沟点均较矫治前无明显上移(P>0.05);上唇下点、软组织颏前点则较矫治前明显上移(P<0.05),上唇沟点、上唇缘点、上唇下点较矫治前明显后移,颏唇沟点、软组织颏前点较矫治前明显前移(P<0.05).结论 自锁托槽矫治系统能有效缩短骨性Ⅱ类错颌椅旁操作时间、提高治疗效率.     

高强度低频稳态噪声对大鼠耳蜗形态和功能影响的研究

目的探讨高强度低频稳态噪声对大鼠耳蜗形态和功能的影响。方法 42只SD大鼠随机分为2组,分别暴露于频率100Hz和300Hz,声压级153.7dB和158dB的声场中10分钟。暴露前、暴露后即刻、3天和7天分别测试大鼠听性脑干反应阈值(ABR),并取耳蜗标本行扫描电镜观察。结果 2组大鼠噪声暴露后听性脑干反应阈值均显著提高,脱离声场3天后仅可轻度恢复,7天后无进一步改善。300Hz组听力损伤更重。2组大鼠内外毛细胞均损伤严重,表现为毛细胞静纤毛缺失、融合及团状变,并可见螺旋器表面渗出性改变。由底圈向顶圈毛细胞损伤逐渐减轻,7天损伤程度较即刻有所减轻。300Hz组损伤较100Hz组重。结论高强度低频稳态噪声可造成大鼠耳蜗形态及功能严重损伤。耳蜗形态损伤以底圈最重,外毛细胞损伤较内毛细胞重。     

广州地区102例正常人紫外线最小红斑量测定

目的:测定广州地区正常人紫外线最小红斑量(MED)的正常值范围,探讨其与性别、年龄、皮肤日光类型的关系。方法:以SUV1000型日光紫外模拟器作为照射光源,测定102名健康志愿者腹部正常皮肤的MED值(Ⅲ型、Ⅳ型皮肤)。结果:102名受试者MED均值:UVA为50.0 J/cm2,UVB为43.0 m J/cm2。不同皮肤类型间,Ⅲ型皮肤MED均值:UVA为38.5 J/cm2,UVB为36.1 m J/cm2;Ⅳ型皮肤MED均值:UVA为50.0 J/cm2,UVB为47.0 m J/cm2,Ⅳ皮肤MED均值均明显大于Ⅲ型皮肤(P值均<0.01)。不同性别间,男性MED均值:UVA为50.0 J/cm2,UVB为43.0 m J/cm2;女性:UVA为50.0 J/cm2,UVB为43.0 m J/cm2,不同性别间差异均无统计学意义(P值均>0.05)。不同性别的不同年龄阶段间UVA、UVB MED均值差异均无统计学意义(P值均>0.05);UVA-MED的正常值范围为≥30 J/cm2,UVBMED的正常值范围为≥29.1 m J/cm2。结论:紫外线MED的影响因素与皮肤日光反应类型有关,Ⅲ型皮肤UVA-MED、UVB-MED均明显低于Ⅳ型皮肤(P<0.01)。本组受试者MED与性别和年龄无直接关系。