ABSTRACT
【Objective】 To study the genotypes of ABO ambiguous blood group samples(n=20) and identify their molecular biological characteristics. 【Methods】 The serological phenotype of the samples was analyzed by serological techniques. Seven exons of ABO gene were amplified by polymerase chain reaction (PCR) and the PCR products were directly sequenced; the genotypes and sequences of ABO subtypes were analyzed. 【Results】 The serological phenotypes of 20 samples presenting ABO ambiguous blood group were as follows: weak A antigen (n=5), weak A antigen combined with anti-A1 antibody (n=5), normal A antigen combined with anti-A1 antibody (n=2), weak B antigen (n=8). The genotypes of them were as follows: Ax02/O01 (n=3), Ael07/O01 (n=2), B313/O01 (n=2), A204/O02 (n=1), A220/O01 (n=1), Ael07/O02 (n=1), Ael02/O01 (n=1), Ael02/O02 (n=1), Ax03/O01 (n=1), Ax03/O02 (n=1), B313/O02 (n=1), B302/O01 (n=1), B302/O02 (n=1), Bw19/O02 (n=1), A102/B313 (n=1) and A101/Bw37 (n=1). 【Conclusion】 ABO genotyping technology can accurately identify the ambiguous blood group of samples, provide definite genetic information of blood group and ensure the safety of clinical transfusion.
ABSTRACT
Objective To investigate the effects of bone marrow stem cells autologous transplantation on left ventricular remodeling after acute myocardial infarction. Methods Acute myocardial infarction models were successfully established in 10 swines, which were ran-dom divided into two groups, placebo group and trasplantation group. One week after operation, bone marrow stem cells autologous transplan-tation was performed, and control group was administrated with placebo. B-ultrasound and emission computed tomography aexaminations were performed to assess the left ventrieular end diastolic dimension, left ventricular tip wall thickness, left ventricular end diastolic volume and left ventricula ejection fraction before operation, one week, three months after acute myocardial infarction. Results Compared with that of control group, three months after acute myocardial infarction, transplantation group witnessed smaller left ventricular end diastolic dimension, thicker left ventricular tip wall, smaller left ventricular end diastolic volume and higher left ventricular ejection fraction. Conclusions Bone marrow autologous transplantation after acute myocardial infarction can alleviate left ventricular remodeling.