乙型肝炎病毒基因型检测及其与肝功能的关系

目的 探讨乙型肝炎病毒基因型与肝功能的关系.方法 采用微板核酸分子杂交ELISA法检测93例不同临床类型的乙型肝炎患者的基因型并同时测定肝功能.结果 93例不同临床类型乙型病毒性肝炎患者中,B型24例(25.81%),C型59例(63.44%),D型5例(5.38%),混合型5例(B/D 3例,C/D 2例,占5.38%).93例不同临床类型的乙型肝炎患者中,以C基因型为主,其次为B基因型,部分以D型和混合型存在,无A、E、F型.按照慢性乙型肝炎、亚急性重型肝炎、肝硬化的顺序,C基因型的检出率逐渐增多,B基因型的检出率逐渐减少.肝癌患者C基因型的检出率没有依次增高.C基因型各型乙型肝炎患者的ALT、AST、TBIL均高于B型,ALB低于B型,但差别无统计学意义.结论 西安地区病毒性肝炎以C基因型为主,部分以B、D及混合型存在,未发现A、E、F型.除肝癌外,C型的检出率随临床类型的加重而增多.     

A NORTHWEST DATABASE MODEL OF SHORT TANDEM REPEAT LOCI IN FORENSIC MEDICINE

CriminalratewasrisingyearafteryearinthenorthwestChina .Itisnecessarytoestablishthefo rensicDNAdatabase .Thereweremanyshorttan demrepeats (STRs)thatappearedtobeabundantandoccurred 15 - 2 0kbonaverageinthehumange nome .STRlociconsistedof 2 - 6bpinlengthasitscoresequences[1] .Thecharacteristicsofhighlyeffi cientandmultipleamplificationmadeSTRsuperiortothetraditionalgeneticmarkers .Alloftheselect edSTRlocihadcommonalleleslessthan 35 0bpinsize[2 ] .STRwasthemostidealgeneticmarkerbe causeofi…     

中华民族STR遗传结构及变化规律的研究(Ⅰ)

选择 9种 STR基因位点和 Amelogenin基因位点 ,以测序为基础 ,研究我国汉族人群 STR遗传结构。采用基因自动测序仪建立了 10个位点基因分析方法 ,通过对汉族群体的基因扫描、基因分型和遗传结构分析 ,获得了 STR基因传递特征的大量基因遗传数据 ,在汉族人群 DP为 1.0 5× 10 -10 ,EPP为 0 .9998,为建立我国不同民族 STR基因数据库、基因资源研究与保持奠定了基础 ,为生物考古、基因诊断、性别鉴定、个人识别、司法审判、侦察破案提供有力的科学依据。     

乙型肝炎病毒B、C基因型与乙肝临床特征的相关性

目的探讨乙型肝炎病毒(HBV)B、C基因型与乙肝临床表现与转归的关系。方法对300例乙肝患者进行B、C基因型检测,比较这两种基因型的临床差异,并对影响乙肝的各种因素进行Logistic回归分析。结果在肝硬化、肝癌组中C基因型构成比和HBeAg阳性率显著高于B型(P分别为0、0.01);两种基因型在患者年龄、性别、丙氨酸氨基转移酶(ALT)水平及HBV含量上的差异无统计学意义(P>0.05);Logistic回归分析表明,C基因型肝癌的发生率是B型的5.43倍(OR=5.43,P=0.01)。结论 HBV基因型是乙肝临床转归的重要因素之一。与B基因型比较,C型HBeAg阴转率较低,更容易导致严重的肝病。     

Genetic polymorphism of T6235C mutation in 3' non-coding region of CYP1A1 and GSTM1 genes and lung cancer susceptibility in the Mongolian population

Objective To estimate the relative risk for lung cancer associated with genetic polymorphism of T6235C mutation in 3' non-coding region (Msp Ⅰ) of cytochrome P450 1A1 (CYP1A1) and glntathione S-transferase M1 (GSTM1) in the Mongolian population in Inner Mongolian Region of China. Methods Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and multiplex PCR methods were used to analyze blood samples obtained from 263 case subjects and 263 control subjects to determine their genotypes for CYP1A1 and GSTM1.Control subjects were matched with case subjects by ethnic background, age and gender. Results The frequencies of the variant CYP1A1 genotypes (CYP1A1C) and GSTM1-null in lung cancer groups were higher than those in control groups (38.4% vs. 28. 5% and 57.8% vs. 48.0%). The individuals who corried with CYP1A1C genotype had a significantly higher risk of lung cancer (OR=1.56, 95% CI=1.08 to 2.25, P=0.016) than those who carried with non-variation CYP1A1 genotype. The ones who carried with GSTM1-null genotype also had a significantly higher risk of lung cancer (OR=1.49, 95% CI=1.06 to 2.10, P=0.023) than these who carried with GSTM1-present genotype.When combination of polymorphisms of CYP1A1 and GSTM1 genotypes was analyzed, the risk of lung cancer for combination of CYP1A1C and GSTM1-null genotypes was increased significantly (OR=2.084, 95e CI=1.27 to 3.42, P=0.003). Susceptibility to lung cancer was related to smoking (OR=2.10, 95% CI=1.48 to 2.98, P=0.000). Considering smoking status, the risk of lung cancer for combination of smoking and CYP1A1C genotype was remarkably increased (OR=2.76, 950/0 CI=1.74 to 4. 37, P=0.000). It was the same case with combination of smoking and GSTM1-null genotype (OR=4. 38, 95% CI=2.35 to 8.15, P=0.000). Conclusion The polymorphisms of CYP1A1C genotype and GSTM1-null are the risk factors of lung cancer in the Mongolian population in Inner Mongolia Region of China. Smoking is also related to susceptibility to lung cancer. There may be a synergetic interaction between CYP1A1C and GSTM1-null in the elevated susceptibility of lung cancer. Smoking may have a synergetic interaction with CYP1A1C and GSTM1-null in the elevated susceptibility of lung cancer.     

乙型肝炎病毒基因型检测与肝炎临床的相关性

目的从分子水平探讨乙肝病毒基因型与HBVDNA水平、HBeAg阳性率的关系。方法采用微板核酸分子杂交ELISA法检测93例不同临床类型的乙肝患者的基因型。结果93例不同临床类型的乙肝患者中,以C基因型为主,其次为B基因型,部分以D型和混合型存在,无A、E、F型。按照亚急性乙型肝炎、慢性乙型肝炎、肝硬化的顺序,C基因型的检出率逐渐增高,B基因型的检出率逐渐降低。肝癌患者C基因型的检出率没有依次增高。C基因型HBVDNA(log值4.69±0.66)水平低于B型(log值5.33±0.66),但无统计学意义(P>0.05),而HBeAg阳性率C型(69.7%)大于B型(42%),且差别有统计学意义(P<0.05)。结论西安地区病毒性肝炎以C基因型为主,部分以B、D及混合型存在,未发现A、E、F型。除肝癌外,C型的检出率随临床类型的加重而增高,C型的HBVDNA水平低于B型,HBeAg阳性率显著高于B型。     

PCR-SSP法检测胎儿、新生儿ABO血型

目的　研究用PCR SSP法鉴定胎儿、新生儿血型及基因型。方法　用PCR SSP法检测 5 6例 16周以上孕妇的胎儿、新生儿脐血红细胞基因型 ;用常规法检测双亲及胎儿、新生儿血红细胞ABO血型。结果　用PCR SSP法检测出全部 5 6例脐血ABO血型及基因型 ;PCR SSP法检测出的子代血型与由父母血型按孟德尔遗传规律推测的子代血型符合率达 10 0 % ;用常规法检测脐血ABO血型 ,检出率为 87.5 %。结论　PCR SSP法检测子代ABO血型方法可靠 ,且可鉴定出其亚型