冻存前后骨髓间充质干细胞的生物学特性和支持?
血的研?/p>
作者:赵智刚,唐晓琼,黎纬明,游泳,邹?/p>
【摘要?/p>
为了了解冻存复苏过程对骨髓间充质干细?/p>
(mesenchymal
stem cell
?/p>
MSC)
生物学特性和支持造血能力的影响,采用常规方法分离培养
骨髓
MSC
,将传代后的细胞用含
10
%二甲亚砜?/p>
40
%胎牛血清的
IMDM
细胞冻存
液保存在
-
196℃液氮中,观察短期(
4
周)和中期(
9-15
月)复苏?/p>
MSC
的活
性、免疫表型、多向分化能力和支持造血的能力,并同冻存前的
MSC
进行?/p>
较?/p>
结果表明:中短期冻存后的
MSC
的细胞活性分别为
(90
?/p>
3.75)
%和
(93
?/p>
2.51)
%;冻存后细胞的增殖能力、免疫表型、体外分化为脂肪和骨细胞?/p>
能力、支持集落(
CFU-GM
?/p>
CFU-E
?/p>
CFU-GEMM
)的生长作用和冻存前
MSC
相似?/p>
结论:骨?/p>
MSC
在液氮中短期和中期保存后,细胞活性略有下降,但是并不?/p>
?/p>
MSC
的增殖、分化和支持造血能力?/p>
【关键词?/p>
支持造血
Biological Characteristics and
Ability of Supporting Hematopoiesis of Bone Marrow Mesenchymal
Stem Cells Pre-and Post-Cryop-reservation
Abstract This
study was aimed to observe the biological characteristics of
cryopreserved bone marrow mesenchymal stem cell (MSC) and to examine
their abilities to support in vitro hematopoiesis.Bone marrow MSC
were cryopreserved in -
196?nbsp;liquid nitrogen for 4 weeks (short term)
and 9-15 months (medium term) with IMDM containing 10% DMSO
?/p>
40%
fetal calf serum as cryoprotectant.The viability
?/p>
proliferation
?/p>
immunophenotype
?/p>
in vitro differentiation and ability of supporting
hematopoiesis of thawed MSC were investigated and compared with these
of pre-cryopreserved MSC.The results showed that the cell viability
were (93
?/p>
2.51)
?/p>
and (90
?/p>
3.75)
?/p>
for MSC cryopreserved as long as
4 weeks or 9-15 months respectively.However
?/p>
there were no changes
detected
?/p>
as compared with pre-cryopreserved MSC in immunophenotype
?/p>
abilities of proliferation and supporting colony forming of CFU-GM
?/p>
CFU-E and CFU-GEMM.It is concluded that bone marrow-derived MSC can
be stored in liquid nitrogen for short-term (4 weeks) or medium-term
(9-15 months) without changes of abilities of proliferation
?/p>
differentiation and hematopoiesis support.
Key words
cryopreservation; mesenchymal stem cell
?/p>
hematopoiesis support
间充质干细胞?/p>
mesenchymal stem cell
?/p>
MSC
)具有多向分化和支持造血的能
力,而且来源广泛,容易在体外培养和扩增,目前已经应用于临床并显示了良
好的治疗效果?/p>
1-4
]。将培养后的
MSC
冻存,在患者需?/p>
MSC
治疗时给予输
注,具有很好的临床应用前景。但是,冻存是否会影?/p>
MSC
的生物学特征,我
们尚不清楚。因此,本研究将骨髓来源?/p>
MSC
冻存?/p>
-
196℃液氮中,观察中?/p>
和短期冻存后
MSC
的增殖、分化和支持造血的能力并同冻存前?/p>
MSC
进行?/p>
较,为进一步在临床中的应用提供详尽的实验依据?/p>
材料和方?/p>
?/p>
?/p>
IMDM
?/p>
DMEM
?/p>
DF12
?/p>
MCDB
培养液、胎牛血清、马血清和甲基纤维素均