摘要
根据免疫磁性分离原理 ,选用能产生高磁场强的磁性材料钕铁硼 ,其核心是将其设计成由低碳钢间隔的 4块钕铁硼 ,并且使每块钕铁硼的规格必须限制在 3.5cm× 2 .0cm× 0 .3cm ,以确保每块钕铁硼平面所具有的磁场强度平均可达 2 70 0高斯。当所切磨的钕铁硼规格达不到该标准时 ,由此产生的磁场强度 >2 70 0高斯或 <2 70 0高斯 ,对CD34+造血细胞的分离效果均不理想。经对人正常骨髓CD34+ 造血细胞的免疫磁性分离证实 ,采用CMSI 10 0富集后的CD34+ 造血细胞纯度平均 >90 % ,细胞活力 >95 % ,达到国际上最好水平 ,其性能完全可与国际通用先进的IsolexTM5
According to the principle of immunomagnetic separation, a novel high-efficient immunomagnetic isolator termed as CMSI 100 for the purification of human CD34 + hematopoietic cells was designed and successfully developed. To do this , neodymium iron boron having magnetic properties superior to any other permanent magnet materials was selected as the key parts of CMSI 100 isolator. The core of the magnet assembly was constructed by sandwiching mild steel bars between 4 pieces of magnet bars of neodymium iron boron. Each piece of magnet bars must be limited to the specifications of 3.5cm×2.0cm×0.3cm so that 2 700 gauss magnetic attractive force could be exerted at the magnet surface. Otherwise magnetic field above the surface of the magnet assembly is either very stronger or weaker, both of which are not beneficial to the enrichment of CD34 + hematopoietic cells. With CMSI 100 immunomagnetic isolator, more than 90% purity and over 95% viability of CD34 + hematopoietic cells could be obtained. These data indicate that CMSI 100 immunomagnetic isolator is as good as the internationally used Isolex TM 50 made by Baxter Company in USA.
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2002年第3期275-276,共2页
Medical Journal of Chinese People's Liberation Army
基金
国家自然科学基金资助课题 (编号 39370 2 72 )
