医学检验与临床
醫學檢驗與臨床
의학검험여림상
MEDICAL LATORATORY SCIENCE AND CLINICES
2013年
4期
3-6
,共4页
沈云青%刘小信%张文静%徐群
瀋雲青%劉小信%張文靜%徐群
침운청%류소신%장문정%서군
Rhesus血型系统%RhD抗原%RHD基因%基因纯和性%免疫血液学
Rhesus血型繫統%RhD抗原%RHD基因%基因純和性%免疫血液學
Rhesus혈형계통%RhD항원%RHD기인%기인순화성%면역혈액학
Rhesus blood group system%RhD antigen%RHD gene%Gene homozygous%Immunohematology
目的:Rhesus血型(简称Rh血型)因其抗原众多、变种各异和临床疾病相关性而备受重视。该血型系统中与临床疾病关联最密切的抗原即RhD抗原具有较高的免疫原性。编码RhD抗原的RHD基因两侧各有一个序列高度相似的Rh盒子基因,RhD阴性即是由上、下游Rh盒子基因之间的基因重组引起。分析RhD阴性孕妇丈夫RHD基因的纯合性可预测胎儿患新生儿溶血病的几率。本研究的目的是分析山东地区汉族人RhD阴性表型形成的分子机制,并对Rh盒子基因的扩增产物进行分析以确定RHD基因的纯合性。方法:74例RhD阴性献血者的DNA样品首先进行多重聚合酶链反应-序列特异性引物(PCR-SSP)分析。然后对Rh盒子基因进行PCR基因扩增,其扩增产物采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法进行RHD基因的纯合性测定。结果:46例(62%)样品在多重PCR-SSP分析中显示缺失RHD基因,在PCR-RFLP分析中显示为纯合的RHD基因阴性。22例(30%)样品显示存在RHD基因,其中19例显示为杂合的RHD基因,3例显示为纯合的RHD基因。5例(7%)样品缺失RHD基因,但PCR-RFLP分析显示存在一个RHD基因,进一步的分析表明它们至少存在RHD基因第1和10外显子。1例(1%)样品显示存在RHD基因,但缺失第6外显子。结论:HD 基因缺失是引起中国汉族人RhD阴性表型形成的主要分子机制。RhD阴性个体主要表现为纯合的RHD基因阴性,少部分RhD阴性个体存在杂合的RHD基因和纯合的RHD基因。
目的:Rhesus血型(簡稱Rh血型)因其抗原衆多、變種各異和臨床疾病相關性而備受重視。該血型繫統中與臨床疾病關聯最密切的抗原即RhD抗原具有較高的免疫原性。編碼RhD抗原的RHD基因兩側各有一箇序列高度相似的Rh盒子基因,RhD陰性即是由上、下遊Rh盒子基因之間的基因重組引起。分析RhD陰性孕婦丈伕RHD基因的純閤性可預測胎兒患新生兒溶血病的幾率。本研究的目的是分析山東地區漢族人RhD陰性錶型形成的分子機製,併對Rh盒子基因的擴增產物進行分析以確定RHD基因的純閤性。方法:74例RhD陰性獻血者的DNA樣品首先進行多重聚閤酶鏈反應-序列特異性引物(PCR-SSP)分析。然後對Rh盒子基因進行PCR基因擴增,其擴增產物採用聚閤酶鏈反應-限製性片段長度多態性(PCR-RFLP)方法進行RHD基因的純閤性測定。結果:46例(62%)樣品在多重PCR-SSP分析中顯示缺失RHD基因,在PCR-RFLP分析中顯示為純閤的RHD基因陰性。22例(30%)樣品顯示存在RHD基因,其中19例顯示為雜閤的RHD基因,3例顯示為純閤的RHD基因。5例(7%)樣品缺失RHD基因,但PCR-RFLP分析顯示存在一箇RHD基因,進一步的分析錶明它們至少存在RHD基因第1和10外顯子。1例(1%)樣品顯示存在RHD基因,但缺失第6外顯子。結論:HD 基因缺失是引起中國漢族人RhD陰性錶型形成的主要分子機製。RhD陰性箇體主要錶現為純閤的RHD基因陰性,少部分RhD陰性箇體存在雜閤的RHD基因和純閤的RHD基因。
목적:Rhesus혈형(간칭Rh혈형)인기항원음다、변충각이화림상질병상관성이비수중시。해혈형계통중여림상질병관련최밀절적항원즉RhD항원구유교고적면역원성。편마RhD항원적RHD기인량측각유일개서렬고도상사적Rh합자기인,RhD음성즉시유상、하유Rh합자기인지간적기인중조인기。분석RhD음성잉부장부RHD기인적순합성가예측태인환신생인용혈병적궤솔。본연구적목적시분석산동지구한족인RhD음성표형형성적분자궤제,병대Rh합자기인적확증산물진행분석이학정RHD기인적순합성。방법:74례RhD음성헌혈자적DNA양품수선진행다중취합매련반응-서렬특이성인물(PCR-SSP)분석。연후대Rh합자기인진행PCR기인확증,기확증산물채용취합매련반응-한제성편단장도다태성(PCR-RFLP)방법진행RHD기인적순합성측정。결과:46례(62%)양품재다중PCR-SSP분석중현시결실RHD기인,재PCR-RFLP분석중현시위순합적RHD기인음성。22례(30%)양품현시존재RHD기인,기중19례현시위잡합적RHD기인,3례현시위순합적RHD기인。5례(7%)양품결실RHD기인,단PCR-RFLP분석현시존재일개RHD기인,진일보적분석표명타문지소존재RHD기인제1화10외현자。1례(1%)양품현시존재RHD기인,단결실제6외현자。결론:HD 기인결실시인기중국한족인RhD음성표형형성적주요분자궤제。RhD음성개체주요표현위순합적RHD기인음성,소부분RhD음성개체존재잡합적RHD기인화순합적RHD기인。
Objective:The Rh blood group system is one of the most polymorphic and clinical important blood group systems in humans. The highly immunogenic RhD antigen is encoded by RHD gene which is flanked by two Rhesus boxes. While the most common RhD-negativity in Whites is caused by a deletion of RHD between the upstream and downstream Rhesus boxes, the sequence of Rhesus boxes in Chinese is stil unknown. The aim of this study is to analyze the sequence of Rhesus boxes gene and explore the genetic mechanism of the RhD negative phenotype in Chinese Han population. Meanwhile the RHD zygosity can be determined by RFLP analysis of PCR product of Rhesus boxes gene. Methods:DNA of 74 RhD negative samples was firstly analyzed with multiplex PCR based method of specific sequence primer (SSP). The further analysis is given by Rhesus boxes specific sequencing and the RHD zygosity can be determined by PCR-RFLP analysis of Rhesus boxes gene.Results:46 samples (62%) showed the absence of RHD by PCR-SSP and homozygous RHD negative by PCR-RFLP. 22 samples (30%) showed al RHD specific exons of which 19 were RHD gene hemizygous and three were homozygous for RHD. 5 samples (7%) showed no RHD specific exons but presented one RHD gene by PCR-RFLP analysis and further analysis show at least exons 1 and 10 of RHD with RHD specific PCRs. 1 sample (1%) was positive by multiplex RHD PCR, lacking RHD exon 6. The sequencing of hybrid Rhesus box in 27 RhD negative samples showed normal sequence of hybrid Rhesus box as in Caucasians.Conclusions:The RHD gene deletion is the main mechanism that cause RhD-negativity in Chinese Han population. Chinese RHD gene deletion has taken place within the defined breakpoint region as in Caucasians.