湖南汉族人群CX3CR1基因多态性分布

目的探讨趋化因子受体CX3CR1基因多态性在湖南汉族健康人群中的分布及其与国内外不同种族之间的差异。方法采用PCR-RFLP技术对150名湖南汉族健康体检者进行CX3CR1基因多态性检测,计算其基因型和等位基因频率,并与国内外多个民族CX3CR1基因多态性分布进行比较。结果湖南汉族人群V249I基因位点有VV和VI两种基因型,以VV基因型为主,没有II基因型,其中VV基因型频率为88%,VI基因型频率为12%,V和I等位基因频率分别为94%和6%;T280M基因位点有TT和TM两种基因型,以TT基因型为主,没有II基因型,其中TT基因型频率分别为95.3%,TM基因型频率为4.7%,T和M等位基因频率分别为97.7%和2.3%。结论湖南汉族CX3CR1基因V249I以VV基因型为主,缺少II和MM基因型,湖南汉族、新疆汉族、景族和傣族都缺少II基因型,T280M以TT基因型为主,缺少MM基因型,湖南汉族CX3CR1基因多态性分布与维吾尔族人群和欧美人群存在较大差异,与国内景族、傣族、新疆汉族和日本人群相似。     

云南傣族景颇族人群中与艾滋病相关的CX3CR1基因多态性分布

目的调查HIV-1感染相关的等位基因CX3CR1的单核苷酸多态在我国云南省德宏州傣族、景颇族人群中的分布.方法以101例傣族人群和113例景颇族人群为研究对象,应用聚合酶链式反应-限制性片段长度多态(PCR-RFLP)分析方法,研究CX3CR1基因序列中249和280位点碱基是否发生突变,并对其群体分布、性别分布进行统计学分析.结果中国傣族人群中I249和M280突变基因频率分别为0.0495和0.0297;中国景颇族人群中I249和M280突变基因频率分别为0.0530和0.0221.结论中国云南傣族、景颇族人群存在CX3CR1基因序列中249和280位点突变,突变频率与国内外各种族相比具有一定的可比性.本实验为国内首次对我国傣族、景颇族人群的HIV-1感染协同受体基因CX3CR1进行收集和分析,这在傣族、景颇族人群艾滋病的预防和治疗方面的意义值得深入研究.     

新疆汉族和维吾尔族健康人群VKORC1启动子区基因多态性研究

目的了解VKORC1—1639A／G基因多态性在新疆汉族和维吾尔健康人群中的分布及其与国外其他不同民族之间的差异。方法采用PCR—RFLP技术对205名汉族和204名维吾尔族乌鲁木齐地区体检健康者VKORC1—1639A／G基因多态性进行检测，计算其基因型和等位基因频率，并与国外多个民族VKORC1—1639A／G基因多态性分布进行比较。结果新疆汉族和维吾尔族健康人群中共检测到2种等位基因：A和G。汉族A和G等位基因频率分别为87％和13％，维吾尔族A和G等位基冈频率分别为62％和38％。新疆汉族和维吾尔族健康人群VKORC1—1639A／G基因多态性共检测到3种基因型，新疆汉族健康人群以AA基因型常见，基因型频率74％。其次是AG基因型，基因型频率分别为26％。GG基因型的个体仅检测到1例，基因型频率小于1。新疆维吾尔族健康人群以AG基因型常见，基因型频率58％。其次是AA基因型，基因型频率分别为33％。GG基因型频率为9％。结论新疆汉族VKORC1—1639A／G基因多态性以AA基因型为主。维吾尔族VKORC1—1639A／G基因多态性以AG基因型为主，新疆汉族VKORC1—1639A／G基因多态性分布与维吾尔族人群和欧美人群存在较大差异。新疆维吾尔族人群VKORC1—1639A／G基因多态性分布与欧关人群接近。     

广西瑶族与汉族人群TGF-β1基因启动子-509 C/T多态性的研究

目的研究TGF-β1(转化生长因子-β1)基因多态性在广西瑶族与汉族人群中的分布.方法应用聚合酶链反应-限制性片段长度多态性技术检测150名瑶族人和190名汉族人的TGF-β1基因多态性,比较两组人群TGF-β1基因型和等位基因的分布频率.结果在瑶族人中CC基因型占46.0%、CT基因型占43.3%、TT基因型占10.7%;在汉族人中CC基因型占30.0%、CT基因型占51.1%、TT基因型占19.9%.两组人群TGF-β1基因型的分布频率差异有显著性(P＜0.05).结论瑶族与汉族人群TGF-β1基因多态性分布频率差异有显著性.     

中国延边地区朝鲜族、汉族人群PRODH和5-HTR2A基因多态性分布

目的 调查与精神疾病相关的PRODH和5-HTR2A基因在中国延边地区朝鲜族、汉族人群中的多态性分布状况,获得相应群体遗传学数据.方法 采用聚合酶链反应.限制性片段长度多态性技术,分析我国延边地区健康朝鲜族和汉族各96名的PRODH-1945和5-HTR2A基因-1438位点的基因型,计算基因型和等位基因频率.结果 延边地区朝鲜族、汉族PRODH-1945(T/C)基因型频率分别为MM型61.4%、Mm型34.4%、mm型4.2%和MM型55.2%、Mm型38.5%、mm型6.3%,等位基因频率分别为M 0.786、m 0.214和M 0.745、m 0.255;5-HTR2A基因-1438A/G,基因型频率分别为从型15.6%、AG型67.7%、GG型16.7%和从型11.5%、AG型65.6%、GG型22.9%,等位基因频率分别为A 0.495、G 0.505和A 0.443、111 0.557.结论 延边地区朝鲜族、汉族PRODH-1945和5-HTReA基因-1438基因座遗传多态性分布均符合Hardy-Weinberg平衡定律,两人群间分布差异无统计学意义,但显示很高的个人识别能力,所得数据资料可为中国延边地区朝鲜族、汉族人群的法医学个人识别、亲子鉴定及遗传学研究提供依据.     

广西壮族与汉族人群的转化生长因子-β1基因多态性

目的研究转化生长因子-β1(TGF-β1)基因-509C/T位点多态性在广西壮族与汉族人群中的分布.方法应用聚合酶链反应-限制性片段长度多态性技术(PCR-RFLP)检测180名壮族人和170名汉族人的TGF-β1基因-509C/T位点多态性,比较两组人群TGF-β1基因型和等位基因的分布频率.结果在壮族人中CC基因型占41.1%、CT基因型占46.1%、TT基因型占12.8%;在汉族人中CC基因型占28.9%、CT基因型占52.9%、TT基因型占18.2%.两组人群TGF-β1基因型的分布频率差异有显著性.结论壮族与汉族人群TGF-β1基因多态性分布频率差异有显著性.     

湖南地区汉族人多巴胺D4受体基因48 bp可变数目串联重复多态性分布

目的 了解湖南地区汉族人群多巴胺D4受体（dopamine D4 receptor，DRD4）基因48 bp可变数目串联重复（variable number tandem repeat,VNTR）多态性基因型及等位基因的频率分布。方法 随机抽取湖南地区304名汉族健康正常人，采用聚合酶链反应、变性聚丙烯酰胺凝胶电泳结合银染技术检测基因型和等位基因的频率。结果 （1）湖南汉族人群DRD4基因48 bp VNTR多态性共检测出7种等位基因、12种基因型。最常见的等位基因是5等位基因（DRD4＊5），频率为70．6％。（2）湖南汉族人群DRD4基因48 bp VNTR多态性各等位基因频率与中国上海、北京、四川地区人群存在明显的差异。（3）湖南汉族人群DRD4基因48 bp VNTR多态性各等位基因频率与日本、美国、墨西哥、意大利人群也存在明显差异。结论 DRD4基因48 bp VNTR多态性分布存在不同程度的地区差异和种族差异。     

中青年脑梗死患者血管紧张素原基因M235T多态性的研究

目的探讨血管紧张素原(AGT)基因M235T多态性与中青年脑梗死(C I)的关系。方法应用聚合酶链反应-限制性片段长度多态性分析法(PCR-RFLP)对62例脑梗死患者,58例正常人进行AGT基因M235T多态性分析。结果脑梗死组AGT基因T235等位基因频率为79.84%,235TT基因型频率为64.52%,对照组分别为73.28%和55.17%。两者的差异无统计学意义χ2=1.09,P=0.296;χ2=1.443,P=0.230,235MT、235MM基因型频率两组相比也无差异(P>0.05)。结论AGT基因M235T多态性可能与中国山西汉族中青年人群C I发病无关。     

广西壮族与汉族人群的转化生长因子-β1基因多态性

目的：研究转化生长因子-β1（TGF-β1）基因-509C／T位点多态性在广西壮族与汉族人群中的分布。方法：应用聚合酶链反应-限制性片段长度多态性技术（PCR-RFLP）检测180名壮族人和170名汉族人的TGF-β1基因-509C／T位点多态性,比较两组人群TGF-β1基因型和等位基因的分布频率。结果：在壮族人中CC基因型占41．1％、CT基因型占46．1％、TT基因型占12．8％;在汉族人中CC基因型占28．9％、CT基因型占52．9％、TT基因型占18．2％。两组人群TGF-β1基因型的分布频率差异有显著性。结论：壮族与汉族人群TGF-β1基因多态性分布频率差异有显著性。     

补体C6 T1674C单核苷酸多态性在中国汉族人群中的分布

目的获得人类补体第六成分(C6)T1674C多态性在中国汉族人群的分布特征。方法采用聚合酶链反应-单链构象多态性(polymerase chain reaction-single strand conformation polymorphism PCR-SSCP)结合核酸测序方法检测150例中国四川泸州汉族人群C6基因T1674C的基因型频率及等位基因频率。结果基因型TT、TC、CC的频率分别为44.67%、23.33%、32.00%,等位基因T、C频率分别为56.33%和43.67%,其基因型频率分布符合Hardy-weinberg平衡定律,个人识别机率为61.7%。结论中国汉族人群C6基因T1674C多态性个人识别能力高,重复性好,在人类遗传学研究及法医学个人识别中有较好的应用价值。     

雷公藤甲素抗肿瘤血管新生的研究进展（英文）

雷公藤甲素(triptolide,TPL)是从中草药雷公藤中提取的一种有效活性物质,已被用来治疗多种疾病,包括系统性红斑狼疮,类风湿性关节炎,肾病综合征等,TPL甚至有很强的抑制肿瘤的活性。近些年的研究显示,TPL具有抗血管新生的能力,TPL不仅可以抑制肿瘤的增殖,诱导细胞的凋亡,还可以抑制肿瘤的转移,可以增加其它化疗药物的抗肿瘤活性。本综述将讨论TPL在抗肿瘤血管新生方面的研究进展,以及初步探讨其潜在的作用机制。     

Changes in activity of neutral proteases in tissues of ground squirrels in the dynamics of hibernation

Total activities of neutral proteases in the cerebral, hepatic, and myocardial tissues of ground squirrel vary during hibernation: in autumn (before hibernation) activities of the enzymes in the brain and myocardium start increasing, while in the liver they do not change. A common feature for all tissues is minimum activity of active neutral proteases in the middle of hibernation month 1 bout, while the maximum activity is recorded before awakening. Translated from Byulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 146, No. 9, pp. 278–280, September, 2008     

Kinetics of decline of maternal measles virus-neutralizing antibodies in sera of infants in France in 2006

The optimal age for measles vaccination is an important health issue, since maternal antibodies may neutralize the vaccine antigen before a specific immune response develops, while delaying vaccination may increase the risk of complicated diseases in infants. However, measles vaccination impacts the duration of protection afforded by transplacental transfer of maternal antibodies: vaccination-induced maternal antibodies disappear faster than disease-induced antibodies. In order to maintain protection against measles in infants, it is important to monitor the dynamics of this phenomenon in vaccinated populations. To assess the current situation in France, a multicenter, prospective seroepidemiological study was conducted in seven French hospitals between October 2005 and January 2007. Maternal measles antibody concentrations from 348 infants 0 to 15 months old were measured using the plaque reduction neutralization assay. Geometric mean concentrations and the percentage of infants with maternal measles antibody concentrations above the protection threshold (≥120 mIU/ml) were assessed according to age. Results show that after more than 20 years of routine measles vaccination in France, maternal measles-neutralizing antibodies decrease dramatically in French infants by 6 months of age, from 1,740 mIU/ml for infants 0 to 1 month old to 223 mIU/ml for infants 5 to 6 months old, and that 90% of infants are not protected against measles after 6 months of age. Infant protection against measles could be optimized both by increasing herd immunity through an increased vaccine coverage and by lowering the age of routine vaccination from 12 to 9 months.     

Effect of vitamin C in reducing the toxicity of endosulfan in liver in rabbits

In this study, the effect of endosulfan, an organochlorine pesticide, and the ameliorating effect of vitamin C on the livers of New Zealand white rabbits were studied. Livers of the rabbits were examined grossly and histopathologically, and caspase-3 activity was detected by immunohistochemical methods. A total of twenty-four rabbits were divided into four groups (n=6). Rabbits in Group I (END) were daily given a sublethal dose of endosulfan (1 mg/kg bw) in corn oil by oral gavage for 6 weeks. Group II (END+C) received the same dose of endosulfan and additionally Vit C (20 mg/kg bw) every other day during this period. Group III (OIL+C) received corn oil daily by oral gavage and vitamin C every other day for 6 weeks. Group IV (OIL), the control group, received only corn oil daily, by oral gavage throughout the experiment. The concentration of α-endosulfan in the END group was higher in livers (0.102±0.012 ppb) than the β-endosulfan (0.072±0.001 ppb). Decreased accumulation of α and β endosulfan was observed in the END+C group (0.025±0.003 and 0.016±0.002 ppb, respectively) (p<0.0001). The most prominent gross findings at the necropsy were seen in the END group, in which swollen and pale livers were commonly observed. Hemorrhages, degenerations, necrosis, and in some rabbits bile duct hyperplasia were the marked histopathological findings of the END group. Caspase-3 positive reaction was more severe in this group than in the others. An ameliorating effect of Vit C on gross, histopathological and immunohistochemical findings was observed in the END+C group. The results revealed that endosulfan is highly toxic for rabbit livers. However, toxicity was decreased by Vit C treatment, which reduced the accumulation of endosulfan in livers four-fold.