Background Rh blood group system is the most complex and immunogenetic blood group system. Prevalent RHD alleles varied in different populations. The purpose of this study is to determine the molecular basis of weak D...Background Rh blood group system is the most complex and immunogenetic blood group system. Prevalent RHD alleles varied in different populations. The purpose of this study is to determine the molecular basis of weak D and DEL phenotype in Anhui Chinese Han population. Methods The D antigen was determined with IgM monoclonal anti-D conformed to the guidelines for donor testing in China. Weak D samples were identified by an indirect antiglobulin test. DEL phenotype was determined by adsorption and elution test. All the RHD 10 exons were screened by PCR with sequence-specific priming or sequenced for the first-time donors who typed weak D, DEL or D negative by serologic test. Results Of all the 30 799 blood donors, 155 blood samples were found D negative with IgM anti-D; 34 blood samples were found D positive by indirect antiglobulin test or absorption elution test. RHD alleles were identified by nucleotide sequencing. Total 4 RHD alleles were found including two new. One hundred and twenty of 155 （77.4%） of the serologically D negative samples lacked the RHD gene. One D negative was RHD（615de12）. Thirty-two of 155 （20.6%） carried RHD（K409K） among them one carrying 1227G〉A and 845G〉A. Two of 155 （1.3%） was weak D type 15. Conclusions In this study at the molecular level, all DEL phenotype is RHD（K409K）; weak D type 15 is the prevalent weak D allele in Anhui Chinese Han population. Additionally, an improved more efficient method was adopted to amplify all the RHD exons in one PCR program. Our study added to the understanding of molecular mechanisms underlying D antigen expression in Anhui Han population and provided useful information for adopting suitable genotyping strategies in routine use.展开更多
Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {...Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {B_t} are established.AMS Subject Classification. 60H05.展开更多
目的了解广州地区人群中弱D72血型的血清学特征及分子遗传背景。方法从广州血液中心献血者人群中收集了62人份D变异型标本,采用多重连接依赖的探针扩增(MLPA)技术做RHD及RHCE基因分型;对于MLPA检测不到的RHD突变型等位基因,对其10个外...目的了解广州地区人群中弱D72血型的血清学特征及分子遗传背景。方法从广州血液中心献血者人群中收集了62人份D变异型标本,采用多重连接依赖的探针扩增(MLPA)技术做RHD及RHCE基因分型;对于MLPA检测不到的RHD突变型等位基因,对其10个外显子做直接测序分析,并采用D抗原表位分析试剂盒(DScreen)及其他7种单克隆抗-D做D抗原表位血清学检测。结果在62例D变异型标本中,共发现26例弱D表型,其中弱D72突变型等位基因5例[占8.1%(5/62)],4例为RHD*weak D type 72/RHD*01N.01(RHD基因缺失)和Ccee,1例为RHD*weak D type 72/RHD*DVI.3和CCeee。取1例RHD*weak D type 72/RHD*01N.01的红细胞标本做D抗原表位血清学检测:其与D-Screen试剂盒的9种单克隆抗-D均呈阳性反应,反应强度为1+~2+,与其余7种单克隆抗-D也均呈阳性反应,反应强度为w+~1+。结论血型血清学分析初步提示弱D72血型D抗原表位完整,但该血型个体在免疫刺激下是否不会产生抗-D仍需进一步临床证据证实。展开更多
文摘Background Rh blood group system is the most complex and immunogenetic blood group system. Prevalent RHD alleles varied in different populations. The purpose of this study is to determine the molecular basis of weak D and DEL phenotype in Anhui Chinese Han population. Methods The D antigen was determined with IgM monoclonal anti-D conformed to the guidelines for donor testing in China. Weak D samples were identified by an indirect antiglobulin test. DEL phenotype was determined by adsorption and elution test. All the RHD 10 exons were screened by PCR with sequence-specific priming or sequenced for the first-time donors who typed weak D, DEL or D negative by serologic test. Results Of all the 30 799 blood donors, 155 blood samples were found D negative with IgM anti-D; 34 blood samples were found D positive by indirect antiglobulin test or absorption elution test. RHD alleles were identified by nucleotide sequencing. Total 4 RHD alleles were found including two new. One hundred and twenty of 155 （77.4%） of the serologically D negative samples lacked the RHD gene. One D negative was RHD（615de12）. Thirty-two of 155 （20.6%） carried RHD（K409K） among them one carrying 1227G〉A and 845G〉A. Two of 155 （1.3%） was weak D type 15. Conclusions In this study at the molecular level, all DEL phenotype is RHD（K409K）; weak D type 15 is the prevalent weak D allele in Anhui Chinese Han population. Additionally, an improved more efficient method was adopted to amplify all the RHD exons in one PCR program. Our study added to the understanding of molecular mechanisms underlying D antigen expression in Anhui Han population and provided useful information for adopting suitable genotyping strategies in routine use.
文摘Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {B_t} are established.AMS Subject Classification. 60H05.
文摘目的了解广州地区人群中弱D72血型的血清学特征及分子遗传背景。方法从广州血液中心献血者人群中收集了62人份D变异型标本,采用多重连接依赖的探针扩增(MLPA)技术做RHD及RHCE基因分型;对于MLPA检测不到的RHD突变型等位基因,对其10个外显子做直接测序分析,并采用D抗原表位分析试剂盒(DScreen)及其他7种单克隆抗-D做D抗原表位血清学检测。结果在62例D变异型标本中,共发现26例弱D表型,其中弱D72突变型等位基因5例[占8.1%(5/62)],4例为RHD*weak D type 72/RHD*01N.01(RHD基因缺失)和Ccee,1例为RHD*weak D type 72/RHD*DVI.3和CCeee。取1例RHD*weak D type 72/RHD*01N.01的红细胞标本做D抗原表位血清学检测:其与D-Screen试剂盒的9种单克隆抗-D均呈阳性反应,反应强度为1+~2+,与其余7种单克隆抗-D也均呈阳性反应,反应强度为w+~1+。结论血型血清学分析初步提示弱D72血型D抗原表位完整,但该血型个体在免疫刺激下是否不会产生抗-D仍需进一步临床证据证实。
