B(A)血型的鉴定及临床输注探讨

摘要

目的 对1例常规血清学为B(A)表现型的献血者进行血型鉴定,探讨B(A)血型在临床输注中的安全性和有效性.方法 采用血型血清学、ABO基因第6及第7外显子直接测序和克隆测序的方法,对该例标本的血清学表型和其ABO等位基因进行检测；同时回顾性调查该献血者前次已献血液输注给B型受血者的相关实验记录和病历.结果 被检血样的血型血清学结果初步定型为B(A)；直接测序和克隆测序发现:被检者含有O01等位基因,B等位基因在第7外显子存在640A/G突变,证实其为B(A)04等位基因,其基因型为B(A)04/O01；该献血者血液输给B型受血者,Hb升高符合预期值,无输血不良反应发生.结论 发现该例B(A)表现型,其基因型为B(A)04/O01型；在配血相合的情况下,B(A)供血者血液输注给B型受血者是安全有效的.%Objective To explore the identification and clinical infusion of B(A) blood group. Methods B(A) blood groups and B(A) alleles of the samples were checked out by serology and direct sequencing and cloning sequencing of ABO gene exon 6 and 7. Retrospective experiment records were collected to analyze the clinical infusion. Results The serological results of the blood sample was shown as B(A). Result of the sequencing analysis showed the sample harbored an O01 allele.and had the nt640 A/G mutation in B gene,which was previously defined as B(A) 04. B(A) blood of donor was infused to type B receptor,whose Hb rising conformed to the expected value, no adverse reaction of blood transfusion occurred. Conclusion The sample is identified as B(A) phenotype in serological tests, whose genotype is rare B(A)04 / O01. Under the consistency of cross matching.it is safe and effective for the blood of B (A) blood donor infused to type B receptor.