Comparison of gene frequencies of 15 STR loci between patients with primary gastric adencarcinomas and the unrelated locals from Xiamen

目的比较15个短串联重复序列(STR)基因座基因频率在原发性胃腺癌患者和厦门地区正常人群中的分布,推测与胃腺癌相关的基因。方法123份血样采自本地区无癌家族史的健康人群,39份血样采自本地区胃腺癌患者。用聚合酶链反应(PCR)复合扩增结合四色荧光检测方法对血样DNA进行基因型分析,调查本地区健康人群和胃腺癌患者人群的基因频率分布,并根据两者的该15个基因座等位基因频率分布的差异性,推测易感连锁和抗性连锁的等位基因。结果厦门地区胃腺癌患者的TH01、vWA和FAG基因座的等位基因的分布与该地区健康人群比较差异有统计学意义(P<0·01)。在个别等位基因比较中,胃腺癌人群TH01-7的基因频率为0·0385,健康人群TH01-7的基因频率为0·2642,两者差异有统计学意义(P<0·01),相对危险度(RR)=0·1115;胃腺癌人群vWA-15基因频率0·0513,健康人群vWA-15的基因频率0·2927,两者差异有统计学意义(P<0·01),RR=0·1307;胃腺癌人群FAG-18的基因频率为0·1026,健康人群FAG-18的基因频率为0·0163,两者差异有统计学意义(P<0·01),RR=6·8998。结论TH01-7与胃腺癌相关联,其附近可能存在胃腺癌抗性基因;vWA-15附近有可能存在与胃腺癌相关的抗性基因;FAG-18与胃腺癌相关联,其附近可能存在胃腺癌易感基因。Objective To compare the gene frequencies of 15 STR loci between patients with primary gastric adencarcinomas and the unrelated locals from Xiamen in order to search for the genes correlated to the gastric adencarcinomas.Methods The control group consisted of 123 unrelated locals and the testing group was composed of 39 gastric adencarcinomas suffers. All genotypes of the sample DNA were analyzed by gene scan technology and multiplex PCR method with 4-colored fluorescence-labeled primers. All the polymorphic alleles of these 15 STR loci in unrelated healthy locals and patients with primary gastric adencarcinomas had been investigated. The sensitive or resistant genetic factors were inferred according to the statistical difference with distribution of allele frequencies.Results It showed that there were statistic differences (P<0.01)between controls and testing groups in allele frequencies of the three loci: TH01, vWA and FAG. The further exploration of the separated locus revealed that the gene frequency of TH01-7 in the gastric adencarcinomas suffers was 0.0385,but 0.2642 in the control group[P<0.01 and relative risk(RR)=0.1115];the gene frequency of vWA-15 in the gastric adencarcinomas suffers was 0.0513,but 0.2927 in the control group(P<0.01 and RR=0.1307);the gene frequency of FAG-18 in the gastric adencarcinomas suffers was 0.1026,but 0.0163 in the control group(P<0.01 and RR= 6.8998). Conclusions It is very possible that TH01 alleles may be associated with gastric adencarcinomas and it is possible that there is a resistant gene to gastric adencarcinomas near the region of TH01-7 locus; there is a resistant gene of gastric adencarcinomas near the region of vWA-15 locus; FAG alleles may be associated with gastric adencarcinomas and perhaps there is a sensitive gene of gastric adencarcinomas near FAG-18 locus

无偿献血者中隐匿性乙型肝炎病毒感染及表面抗原突变分析

采用多种免疫学检测和核酸检测相结合的方法调查了我国南方某城市无偿献血者中隐匿性乙型肝炎病毒(HBV)感染的存在情况。结果在9023例乙肝表面抗原(HBsAg)阴性的无偿献血者中,共发现17例HBV DNA阳性,隐匿性HBV感染者的发生率为0.19%(95%CI:0.11～0.30%)。序列分析显示其中6例在HBsAg"a"表位(aa124～aa147)存在不同程度氨基酸突变,突变发生率为42.9%(6/14,有3例未扩增出"a"表位片段序列),G145R突变是该地区隐匿性HBV携带者中发生频率最高的突变(4/6,66.7%)。隐匿性HBV感染者中基因型C的比例(10/17)显著高于HBsAg阳性的HBV感染者(0/15,P<0.01)

Sensitive and resistant genetic factors related to colorectal cancer in patients from Xiamen

目的:比较15个STR基因座基因频率在厦门地区大肠癌患者和正常人群中的分布,推测与大肠癌相关的基因．方法:应用PCR复合扩增结合四色荧光检测方法对血样DNA进行基因型分析,调查了本地区大肠癌患者人群和无关人群的基因频率分布,并根据二者的该15个基因座等位基因频率分布的显著性差异,推测易感连锁和抗性连锁的等位基因．结果:厦门地区大肠癌患者的D5S818(0．5200 vs 0,219 5,X2=36．69,P<0．01;RR=3．8521, P<0．05)、vWA(0．0500 vs 0．2927,X2=53．99, P<0．01;RR=0．1272,P<0．05)和FAG(0．09 vs 0．2439,X2=37．58,P<0．01:RR=0．3066, P<0．05)基因座的等位基因的分布与该地区健康人群有显著性差异,(P<0．01)．B组超微结构改变明显,而C组较B组超微结构有不同程度减轻．结论:D5S818-11附近可能存在大肠癌易感基因;vWA-15、FAG-23附近有可能存在与大肠癌相关的抗性基因．AIM: To compare the gene frequencies of 15 STR loci between patients with colorectal cancer and healthy people from Xiamen in order to search for the genes that related to the colorectal cancer. METHODS: The genotypes of the sample DNA were analyzed by multiplex polymerase chain reaction (PCR) combined with 4-colored fluorescence-labeled method. All the polymorphic alleles of these 15 STR loci in the unrelated healthy locals and patients with colorectal cancer were investigated. The sensitive or resistant genetic factors were inferred according to the statistical difference in the distribution of allele frequencies. RESULTS: There were statistical differences between the healthy controls and patients with colorectal cancer in allele frequencies of the three loci: D5S818 (0.520 0 vs 0.219 5, X2=36.69, P < 0.01; RR = 3.8521, P < 0.05), vWA (0.050 0 vs 0.292 7, X2=53.99, P < 0.01; RR = 0.127 2, P < 0.05), and FAG (0.09 vs 0.243 9, X2=37.58, P < 0.01; RR = 0.306 6, P < 0.05). CONCLUSION: It is very possible that there is a sensitive gene for colorectal cancer near the area of D5S818-11 locus, and there are resistant genes for colorectal cancer near the region of vWA-15 and FAG-23 locus

Quantitation of HTLV-I Proviral Load Using Real-time Quantitative PCR with Taqman MGB Probe

建立了一种快速检测HTlV-I前病毒的荧光定量方法。利用HTlV前病毒dnA序列设计特异性TAQMAnMgb探针及引物对目标dnA片段进行实时检测,用含目标片段质粒构建标准曲线。该定量检测方法在103--107COPy/μl范围内与CT值呈良好线性关系(r2可达0.999),最低检测浓度为5COPy/μl。利用该系统对献血者血液标本进行HTlV前病毒初筛确认及定量检测,结果表明该方法重复性良好,特异性高,适用于献血者和临床标本的检测和确认,亦可用于对HTlV病毒载量与成人T细胞白血病等疾病的关联性进行研究。A quantitative real-time PCR assay was developed to measure the proviral load of human T-lymphotropic virus type I(HTLV-I) in peripheral blood.The technology utilizes special primers and Taqman MGB fluorescence probe to measure amplification products from the gag-pro-pol polyprotein gene of HTLV-I.HTLV-I copy number was normalized to the amount of cellular DNA by quantitation of the β-actin gene.The amplification system was sensitive to detect 5copy/μL.The standard curve had a good linearity when the quantity for the gene was between 103 and 107 copy/μL(R2=0.999).Good reproducibility was observed in each intra-and inter-assay.We also measured proviral load in peripheral blood in 12 HTLV-I seropositive former blood donors.Proviral load for HTLV-I infected donors ranged from 0.015 to 12.819 copy/cell in WBC with the mean of 3.116 copy/cell

新疆城镇产业布局分析与决策支持系统研发及应用研究

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