Influence of different oxygen partial pressures on cytokines secreted from human adipose-derived stem cells

doi:10.3969/j.issn.2095-4344.2013.45.007

Abstract

Abstract:

BACKGROUND: Effects of different oxygen partial pressures on cytokine secretion of human adipose-derived stem cells have been differently reported. These differences may be caused by varying oxygen partial pressures.
OBJECTIVE: To investigate the influence of different oxygen partial pressures on cytokines secreted from human adipose-derived stem cells.
METHODS: Human adipose-derived stem cells were cultured in vitro and identified by its immunophenotype. Human adipose-derived stem cells were divided into five groups and cultured under different oxygen partial pressure conditions (1%, 3%, 5%, 10%, 21%) for 24 hours, respectively. With quantitative real-time PCR and enzyme linked immunosorbent assay, the secretion of cytokines, vascular endothelial growth factor, hepatocyte growth factor, nerve growth factor, keratinocyte growth factor, from human adipose-derived stem cells were analyzed on the gene and protein levels.
RESULTS AND CONCLUSION: Human adipose-derived stem cells were positive for CD71, CD73, CD90, CD105 and negative for CD34, CD45, CD54, HLA-DR. From the aspect of gene level, hypoxia (1%, 3% O2) promoted the expression of vascular endothelial growth factor and nerve growth factor from human adipose-derived stem cells (P < 0.01), and significantly elevated the expression of hepatocyte growth factor (P < 0.05); however, there was no significant influence on keratinocyte growth factor under hypoxia (P > 0.05). Based on the protein level, protein secretion of hepatocyte growth factor and vascular endothelial growth factor from human adipose-derived stem cells was increased under hypoxia (P < 0.01), but no changes occurred in nerve growth factor and keratinocyte growth factor. After cultured under hypoxic environment, human adipose-derived stem cells were promoted to express gene vascular endothelial growth factor, hepatocyte growth factor and nerve growth factor, as well as to secrete protein keratinocyte growth factor and vascular endothelial growth factor.

Key words: stem cells, phenotype, cytokines, hepatocyte growth factor, nerve growth factor

CLC Number:

R394.2

Jiang Yi-yao, Liu Xiao-cheng, Pei Yu, Zhu De-lin. Influence of different oxygen partial pressures on cytokines secreted from human adipose-derived stem cells[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2013.45.007.

Figures/Tables 4

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