沈阳地区汉族人群中HLA—DR、DQ抗原多态性分析

1.本文报道了HLA—DR、DQ抗原在沈阳汉族人群中的分布,HLA—DR基因频率为0.8132,尚有空白0.1868,HLA—DQ基因频率为0.7964,尚有空白0.2036。说明沈阳地区汉族人群无论HLA—DR或HLA—DQ均有新的抗原未被发现。2.HLA—DR1明显高于上海、湖北及四川;HLA—DR 3明显低于湖北,略低于上海;HLA—DR 4明显低于湖北,HLA—DR 7明显低于上海,HLA—DRw9明显低于上海、四川。HLA—DQw 3明显低于四川。3.本文首次在中国沈阳汉族人群中检测到HLA—DQw 2、DOwa、TA10。     

106例广东汉族群体HLA基因频率的分析及其意义

目的 探讨广东汉族群体HLA抗原多态性分布的情况。方法 随机选择了106例广东籍汉族人进行HLA分型。分别采用微量淋巴细胞毒试验及PCR－SSP方法检测了HLAⅠ类,A,B位点及HLAⅡ类DR位点。结果 共检出了HLA－A位点抗原10种,HLA－B位点抗原21种,HLA－DR位点抗原13种,并与北方人群抗原分布进行对比。结论 A11,B46和B60抗原频率比北方人群有显著增高,而A1,A3、B7等抗原则相对减少,显示广东地区汉族人群与北方人群间在HLA多态性分布上有较显著的差异。     

四川地区汉族人群HLA—DR抗原的分布调查

本文报导四川地区110例汉族人群的HLA—DR抗原分布调查。结果发现DR4抗原频率最高;其次为DR3和DR2,DR1最低。DR位点空白基因频率为0.1820。为验证资料的可靠性,进行了Hardy—Weinberg吻合度测验(P>0.05)和11个家系调查,结果表明数据可靠。本文还对比了国内外DR分型的资料。     

山东省急性淋巴细胞白血病患儿HLA-A、B、DRB1等位基因多态性研究

目的:研究山东省汉族急性淋巴细胞性白血病(ALL)患儿与等位基因HLA-A、B、DRB1的多态性的遗传关联。方法:采用聚合酶链反应-序列特异性寡核苷酸探针(PCR-SSO)方法,对197例ALL患儿和5841例健康脐带血样本等位基因HLA-A、B、DRB1多态性进行研究。结果:在等位基因HLA-A、B、DRB1中,ALL患儿的A11和A24;B40、B15、B56、B67和B27;DR9、DR12、DR14和DR16等基因的基因频率显著高于正常人群(P<0.01)。而HLA-B48、DR7和DR15等基因的基因频率显著下降(P<0.05)。结论:基因HLA-A11、A24、B40、B15、B56、B67、B27、DR9、DR12、DR14、DR16对ALL患儿有遗传易感作用,尤其是B40与ALL具有强相关性;而基因HLA-B48、DR7、DR15等对ALL患儿有遗传拮抗作用。     

58名老人的HLA调查

Gerkins等(1974)报告HLA-A、B位点,特别是B位点可检出的抗原数随年龄而异,健康老人HLA-A,B位点检出4种抗原的频率大于健康年青人,癌组比正常人组频率低。Bender等(1976)的研究则否定HLA-A、B位点检出4种抗原是长期存活的标记。Macurov(?)等(1975))及Convere等(1978)观察到老人比年青人HLA—B位点异合率高。Proust等(1982)研究了HLA-A,B,C,DR位点抗原与长寿的关系,未发现老人组与年青人组间任何位点抗原频率或异合率有显著性差异,但把男性与女性以比较时,发现CW1抗原与女性长寿有关,CW7抗原与男性长寿有关,男性长寿者还见联显抗原A1、CW7、B8、DR3显著增多,根据基因连连锁不平衡现象,进一步指     

山东地区汉族类风湿关节炎与HLA-DR1、DR4、DR10基因的关联性研究

目的:观察山东地区类风湿关节炎(RA)发病及其临床表现与人类白细胞相关抗原(HLA)-DR1,DR4、DR10等位基因频率的关系。方法:特异性引物聚合酶链式反应(PCR-SSP)方法分别测定132例RA患者及130例正常人的HLA-DR1,DR4、DR10的基因频率。结果:3种基因在132例RA患者中基因频率分别为9.8%、46.2%、11.4%,而在正常对照组的相应基因频率分别为5.4%、19.2%、6.9%,其中HLA-DR4较正常对照有统计学意义,HLA-DR1,DR10则无统计学意义。结论:山东地区RA易感性与共同表位(SE)有关,其中主要和HLA-DR4关联密切。HLA-DR1,DR10不是RA易感基因。     

糖尿病与HLA关联性的初步研究

对29例糖尿病病人做了HLA分型,并同59例健康人HLA分型结果进行了比较。发现糖尿病组DRw12、Cw9、DRw17、Bw75、A3、DR9、A2、DQw2、B35、DQw9、DRw53、Cw6、DR7等抗原频率均有明显增高,而Cw7、Cw1、B39、DR4、DRw16、A26、DR1、DQw5、DQw8、DQw6等抗原频率均有显著性降低。A2-B13、DRwl2-DQw7和B35～Cw93种单倍型,具有显著性水平的连锁不平衡,其△值为正值,呈明显正向连结;而Cw10-DQw6、Cw6-DRw12、Cw10-DRw15、B35-Cw10、A2-B35、Cw4-DQw9、Cw4-DR9、B60-Cw9、DRw12-DQw2、A24-Cw6、A3-B13等单倍型,具有显著性水平的负连锁不平衡,其△值为负值,呈明显负向连结。提示可能同频率降低的抗原一样,是有保护性意义的。     

西南地区藏族和彝族人群的HLA—A、B和DR抗原的分布调查

本文报导西南地区72例藏族和75例彝族的HLA—A、B和DR抗原分布调查,并和以前调查的汉族结果进行对比。结果表明三个民族HLA抗原的分布基本轮廓相似,但在某些抗原频率上,三个民族间有明显差异(P<0.05或P<0.01)。藏族的A2、A3和DR4偏高,未发现Aw23、B14和B18;彝族的B7和DR5偏高,未发现A3、Aw23和B37;汉族的B13、B17和DR3偏高,未发现A25。本文还对比了纯藏、纯汉和藏汉混血者三个群体的HLA分布,并进行了讨论。     

HLA组织配型在PRA阳性受者肾移植中的应用

目的探讨人类白细胞抗原(HLA)组织配型在群体反应性抗体(PRA)高受者肾移植中的意义。方法对26例群体反应性抗体(PRA)高达38％～88％的肾功能衰竭患者用单克隆抗体分型板实施HLA组织配型。结果供受者HLA-A，B，DR位点各有一个抗原相配者5例；HLA-A位点1个抗原相配B位点1个抗原、DR位点2个抗原相配者8例；HLA-A位点2个抗原相配、B位点2个抗原相配、DR位点1个抗原相配者4例；HLA-A位点1个抗原相配、B位点2个抗原相配、DR位点2个抗原相配者9例。术后5例发生急性排斥反应，经抗排异治疗逆转4例，1例移植肾失功；25例肾功能恢复正常。结论良好的HLA配型对PRA高的受者的肾移植具有重要意义。     

非霍奇金淋巴瘤 HLA 表达的研究

我们使用130种人类白细胞抗原(HLA)分型血清,对北方汉族32例非霍奇金淋巴瘤(NHL)患者进行了HLA-A、B、C、DR、DQ抗原表型频率分析,并与62名相应地区的健康人进行了对照比较,探讨NHL与HLA的相关性和发病的关联性.     

Grave''''s病与HLA相关研究

本文调查了湖南省30例Graves病患者和46例健康人的HLA分布。资料表明Graves病患者组中HLAB5、Cw7、DR4、DQw3的抗原频率显著上升,HLA-A2 抗原频率比对照组低17.39％,HLA-B8 抗原频率,患者组和对照组均为O,HLA-A11和Cw4的抗原频率虽有上升,但统计学分析无显著性意义。     

广东汉族人群HLA-Cw多态性及单体型分析

目的 检测广东汉族人群HLA-Cw及HLA-A、B、DRB1基因频率,分析该人群HLA-Cw等位基因多态性及其单体型特点。方法 骨髓移植供者185例,抗凝血提取DNA,半量全自动PCR-RSSO分型检测HLA-A、B、Cw、DRB1基因型。结果 在分辨水平检出Cw等位基因11个,其中分布频率较高的依次为Cw^*03(0.2580)、Cw^*07(0.1887)、Cw^*01(0.1732)、Cw^*08(0.1070)。统计分析呈现显著连锁不平衡的HLA-Cw-A单体型7个,HLA-Cw-B单体型20个,HLA-Cw-DRB1单体型10个。结论 广东汉族群体HLA-Cw基因具有较为丰富的多态性,其与HLA-A、B、DRB1间连锁不平衡单体型具有地区性遗传特征。     

广东汉族人群HLA-Cw多态性及单体型分析

目的检测广东汉族人群HLA．Cw及HLA-A、B、DRB1基因频率，分析该人群HLA-Cw等位基因多态性及其单体型特点。方法骨髓移植供者185例，抗凝血提取DNA，半量全自动PCR-RSSO分型检测HLA-A、B、Cw、DRB1基因型。结果在分辨水平检出Cw等位基因11个，其中分布频率较高的依次为：Cw*03(0．2580)、Cw*07(0．1887)、Cw*01(0．1732)、Cw*08(0．1070)。统计分析呈现显著连锁不平衡的HLA-Cw．A单体型7个，HLA-Cw-B单体型20个，HLA—Cw．DRB1单体型10个。结论广东汉族群体HLA-Cw基因具有较为丰富的多态性，其与HLA-A、B、DRB1间连锁不平衡单体型具有地区性遗传特征。     

协同刺激因子B7在药物性间质性肾炎和IgA肾病间质损伤中的作用

目的探讨协同刺激因子Ｂ７介导的免疫反应在药物性间质性肾炎和ＩｇＡ肾病间质损伤发生中的作用。方法应用免疫组织化学方法对药物性间质性肾炎,ＩｇＡ肾病伴肾小管间质损伤（ＩｇＡＮ）患者和正常人肾组织中协同刺激因子Ｂ７－１和Ｂ７－２,ＨＬＡ－ＤＲ抗原以及ＣＤ４＋和ＣＤ８＋细胞的分布进行了观察和分析。结果间质性肾炎患者肾间质ＣＤ４＋和ＣＤ８＋细胞浸润明显增加,表达Ｂ７－１和Ｂ７－２的细胞显著增多,同时伴肾小管上皮细胞ＨＬＡ－ＤＲ和Ｂ７－１表达的增加。ＩｇＡＮ患者肾间质中ＣＤ４＋和ＣＤ８＋细胞较正常人增多,表达Ｂ７－１的细胞无明显差异。肾小管上Ｂ７－１的表达有所增加,但ＨＬＡ－ＤＲ的表达不增加。结论药物性间质性肾炎和ＩｇＡＮ患者肾小管及间质免疫损伤的表现形式及发生机理存在着差异。     

Lack of response to recombinant hepatitis B vaccine in nonresponders to the plasma vaccine

Yeast recombinant hepatitis B vaccine was administered to 25 nonresponders to the plasma-derived hepatitis B vaccine. After three 10-micrograms doses, nine subjects (36%) produced levels of antibodies to hepatitis B surface antigen (anti-HBs) of less than 2.1 sample ratio units (SRU) (nonresponders), and five (20%) developed anti-HBs of 2.1 to 9.9 SRU (hyporesponders); anti-HBs levels of 10 SRU or greater were detected at least once in 11 vaccinees (44%), but by the sixth and 12th months after the last vaccination, only three and one of these "responders," respectively, still maintained anti-HBs values of 10 SRU or greater. In these 25 subjects HLA subtyping showed a high prevalence of DR7, B8, and the combinations of DR3 and DR7 and DR4 and DR7. Our findings indicate that the yeast recombinant hepatitis B vaccine was not effective in eliciting a sustained anti-HBs response in nonresponders to the plasma hepatitis B vaccine.     

B7.1 MOLECULE EXPRESSION ON TUMOR CELLS IN HUMAN CANCEROUS TISSUSES

The data from in vitro and animal experiment study has showed that costimulaory molecule B7.1 plays an important role in antitumor immunity, In the present study, B7.1 expression was observed in 130 samples from a veriety of human malignancies by using immunocytochemistry, in situ hybridization and RTPCR combined with dot hybridization and B7.1 specific Mab and probe. The results demonstrated B7.1 expression on tumor cells in 76 cases at both protein and mRNA level. Forty-two specimens were stained with B7.1 HLA-ABC and HLA-DR Mab and 26 showed that the three antibodies used all were positive.Together with the achievement in tumor antigen study, the present findings imply that in most tumors(if not all) the tumor cells have all the requisite element to elicit anti-tumor rejection response, the heterogeneous mechanism for tumor escape from immunosurvillance sbould be emphasized.     

Relationship of large multifunctional proteasome 7 gene polymorphism with susc eptibility to type 1 diabetes mellitus and DR3 gene

Objective To study the relationship of the large multifunctional proteasome 7 (LMP7) gene polymorphism with susceptibility to type 1 diabetes mellitus (DM-1) and the DR3 gene in south Chinese Han population.Methods LMP7 genotypes and the DR3 gene were identified in 71 DM-1 patients and 86 hea lthy persons (as controls) by polymerase chain reaction-restriction fragment le ngth polymorphism. DM-1 patients and controls were divided into DR3-positive and DR3-negative subjects. The frequencies of LMP7 genotypes and alleles were compared between DM-1 patients and controls respectively in the random subjects and in the DR3-matched subjects. Furthermore, DM-1 patients were divided int o 3 groups according to the age of diabetic onset: group A≤14 years, group B 15 -30 years, group C≥31 years. Results In the random subjects, the frequency of LMP7-B/B was lower (39% vs 58%, P&lt; 0.05) and that of LMP7-B/A was higher (54% vs 31%, P&lt;0.01) in DM-1 patie nts than that in controls. In DR3-positive subjects, the frequencies of LMP7 g enotypes and alleles showed no differences between DM-1 patients and controls. In DR3-negative subjects, the frequency of LMP7-B/B was decreased (40% vs 61% ) and that of LMP7-B/A was increased (55% vs 28%, P&lt;0.01) in DM-1 patient s. The frequencies of LMP7 genotypes and alleles showed no significant differen ces among different ages of diabetic onset.Conclusions LMP7-B/B may be the protective genotype, and LMP7-B/A may be the susceptible g enotype of DM-1, and this may not be affected by the DR3 gene. Persons with LM P7-B/B may have a decreased risk, and those with LMP7-B/A have an increased ri sk suffering from DM-1. The LMP7 gene may not be associated with the age of di abetic onset.