1.西安交通大学第一附属医院妇产科,西安 710000
2.西安交通大学医学部,西安 710000
Received:03 January 2022,
Revised:2022-04-12,
Accepted:15 June 2022,
Published:28 February 2023
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唐苗苗,宾雅棣,赵蓝波,等.基于免疫磁珠法的不同筛选方案对胎儿有核红细胞富集效果的比较[J].重庆医科大学学报,2023,48(02):155-161.
Tang Miaomiao,Bin Yadi,Zhao Lanbo,et al.The comparison of enrichment effects of different screening schemes for fetal nucleated red blood cells from maternal blood by magnetic-activated cell sorting[J].Journal of Chongqing Medical University,2023,48(02):155-161.
唐苗苗,宾雅棣,赵蓝波,等.基于免疫磁珠法的不同筛选方案对胎儿有核红细胞富集效果的比较[J].重庆医科大学学报,2023,48(02):155-161. DOI: 10.13406/j.cnki.cyxb.003167.
Tang Miaomiao,Bin Yadi,Zhao Lanbo,et al.The comparison of enrichment effects of different screening schemes for fetal nucleated red blood cells from maternal blood by magnetic-activated cell sorting[J].Journal of Chongqing Medical University,2023,48(02):155-161. DOI: 10.13406/j.cnki.cyxb.003167.
目的
2
将密度梯度离心(density gradient centrifugation,DGC)与免疫磁珠法(magnetic-activated cell sorting,MACS)相结合,应用4种不同的筛选方案,对脐血中的胎儿有核红细胞(fetal nucleated red blood cells,FNRBC)进行分离,评估不同策略富集FNRBC的效果。
方法
2
对10例脐血标本(12 mL/例)按4种不同方案进行筛选:DGC;DGC+MACS阴性筛选(CD45
-
);DGC +MACS阳性筛选(CD71
+
);DGC+MACS阴性/阳性筛选(CD45
-
/CD71
+
)。通过细胞计数板计数,K-B染色后显微镜下人工FNRBC计数,从获得总细胞量、FNRBC量和FNRBC比例经
t
检验后评估不同方案富集FNRBC的效果。
结果
2
①与其他3组相比,DGC方案可获得的总细胞量(0.95×10
7
/mL)最多,FNRBC数量(39.87/mL)最多,FNRBC比例最低(0.004‰),差异均具有统计学意义(均
P
=0.000);②与其他3组相比,DGC+MACS阴性/阳性筛选(CD45
-
/CD71
+
)组合法所获得的总细胞量最少(0.81×10
6
/mL),获得FNRBC数量也最少(7.47/mL),差异均具有统计学意义(均
P
=0.000);③DGC+MACS单种抗体筛选方案中,DGC+MACS阳性筛选(CD71
+
)所获得总细胞量为1.99×10
6
/mL,较DGC+MACS阴性筛选(CD45
-
)(2.56×10
6
/mL)低,差异有统计学意义(
P
=0.000),而两方案所得FNRBC数量之间差异无统计学意义(
P
=0.910);④DGC+MACS阴性筛选(CD45
-
),DGC+MACS阳性筛选(CD71
+
),DGC+MACS阴性/阳性筛选(CD45
-
/CD71
+
)所得FNRBC比例之间差异无统计学意义(
P
=0.030、0.050、0.210)。
结论
2
DGC方案获得FNRBC数量最多;DGC+MACS阴性/阳性筛选(CD45
-
/CD71
+
)方案去除混杂细胞能力最强。在不降低获取目标细胞数量基础上,DGC+MACS阳性筛选(CD71
+
)方案富集FNRBC效果最好。
Objective
2
To isolate fetal nucleated red blood cells(FNRBC)from maternal umbilical cord blood through density gradient centrifugation(DGC)and magnetic-activated cell sorting(MACS) by four different screening schemes,and to evaluate the screening effect of different methods.
Methods
2
Ten samples of umbilical cord blood(12 mL/case)were collected. Each sample was divided into 4 groups:Group 1:DGC; Group 2:DGC+MACS negative screening(CD45
-
);Group 3:DGC+MACS positive screening(CD71
+
);Group 4:DGC+MACS negative/positive screening(CD45
-
/CD71
+
). After screening,the number of cells was counted,and the
t
-test was carried out to evaluate the enrichment efficiency of each method. K-B staining was used to identify FNRBC count,and then the number and the proportion of FNRBC were calculated.
Results
2
①Compared with the other three groups,DGC method had the largest total cell number(0.95×10
7
/mL),the largest FNRBC number(39.87/mL) and the lo
west proportion of FNRBC(0.004‰),with statistically significant differences(
P
=0.000);②DGC+MACS negative / positive screening(CD45
-
/CD71
+
) method got the least total cells number(0.81×10
6
/mL)and the least FNRBC number(7.47/mL),with statistically significant differences(
P
=0.000);③In the DGC+MACS single antibody screening method,the total number of cells(1.99×10
6
/mL)obtained by DGC+MACS positive screening(CD71
+
) was lower than that by DGC+MACS negative screening(CD45
-
)(2.56×10
6
/mL). The difference was statistically significant(
P
=0.000). However,there was no significant difference in the number of FNRBC between the two methods(
P
=0.910);④There was no significant difference in the proportion of FNRBC between DGC+MACS negative screening(CD45
-
),DGC+MACS positive screening(CD71
+
) and DGC+MACS negative/positive screening(CD45
-
/CD71
+
)(
P
=0.030,0.050,0.210).
Conclusion
2
The number of FNRBC obtained by DGC is the largest. DGC+MACS negative/positive screening(CD45
-
/CD71
+
)has the strongest ability to remove mixed cells. The effect of enriching FNRBC by DGC+MACS positive screening(CD71
+
) is the best without reducing the number of target cells.
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