Lan LIU, Xingke LIU, Mengchang LIU, et al. Effects of direct current electric field on proliferation and biological characteristics of human adipose derived mesenchymal stem cells[J]. Journal of Third Military Medical University, 2021, 43(11): 1010-1017.
DOI:
Lan LIU, Xingke LIU, Mengchang LIU, et al. Effects of direct current electric field on proliferation and biological characteristics of human adipose derived mesenchymal stem cells[J]. Journal of Third Military Medical University, 2021, 43(11): 1010-1017. DOI: 10.16016/j.1000-5404.202101054.
Effects of direct current electric field on proliferation and biological characteristics of human adipose derived mesenchymal stem cells
To investigate the effect of direct current (DC) electric field on the proliferation of human adipose-derived stem cells (hASCs)
in vitro.
Methods
2
The fat tissue obtained in operation was digested with zymogen to prepare hASCs. After the cell culture was passaged to the third generation
the hASCs were inoculated in a 6-well plate. After 24 h
the cells were cultured under a stimulation of 0
50
100
150 and 200 mV/mm DC electric field
at a frequency of 1 h/d for 3 continuous days. Cell morphology and growth were observed under an inverted microscope. Cell counting and CCK8 assay were carried out to measure cell proliferation. Flow cytometry was performed to detect the expression of stem cell phenotype markers
CD105
CD73
CD90
CD14
CD34
CD31 and CD45. The effect of DC electric field stimulation was observed after differentiation induction. Western blotting was used to detect the expression of proteins related to cell proliferation in stimulated and unstimulated cells.
Results
2
The proliferation rate and absorbance value were significantly higher in the cells after 50
100 and 150 mV/mm stimulation than those without (all
P
<
0.01). When the stimulation intensity of the DC electric field was increased to 200 mV/mm
the proliferation rate was significantly lower (
P
<
0.001)
but the absorbance value was statistically higher than those of the 0 mV/mm stimulation (
P
<
0.05). The stimulation also resulted in remarkably higher expression of CD105
CD73 and CD90
and lower expression of CD14
CD31
CD34 and CD45. Moreover
the hASCs could differentiate into bone cells and adipocytes with and without DC electric field stimulation
but the stimulated cells had faster differentiation than those without. Compared with the unstimulated cells
the expression
of cell proliferation related protein p-ERK1/2 was significantly increased in the stimulated cells (
P
<
0.01).
Conclusion
2
The DC electric field promotes the proliferation of hASCs probably by regulating the phosphorylation of ERK
but has no effect on the biological characteristics of the stem cells.
关键词
Keywords
references
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