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KMID : 0311120110520060999
Yonsei Medical Journal
2011 Volume.52 No. 6 p.999 ~ p.1007
Rapid Isolation of Adipose Tissue-Derived Stem Cells by the Storage of Lipoaspirates
Eom Young-Woo

Lee Jong-Eun
Yang Mal-Sook
Jang In-Keun
Kim Hyo-Eun
Lee Doo-Hoon
Kim Young-Jin
Park Won-Jin
Kong Jee-Hyun
Shim Kwang-Yong
Lee Jong-In
Kim Hyun-Soo
Abstract
Purpose: This study examined a rapid isolation method decreasing the time and cost of the clinical application of adipose tissue-derived stem cells (ASCs).

Materials and Methods : Aliquots (10 g) of the lipoaspirates were stored at 4¡É without supplying oxygen or nutrients. At the indicated time points, the yield of mononuclear cells was evaluated and the stem cell population was counted by colony forming unit-fibroblast assays. Cell surface markers, stem cell-related transcription factors, and differentiation potentials of ASCs were analyzed.

Results: When the lipoaspirates were stored at 4¡É, the total yield of mononuclear cells decreased, but the stem cell population was enriched. These ASCs expressed CD44, CD73, CD90, CD105, and HLA-ABC but not CD14, CD31, CD34, CD45, CD117, CD133, and HLA-DR. The number of ASCs increased 1¡¿1014 fold for 120 days. ASCs differentiated into osteoblasts, adipocytes, muscle cells, or neuronal cells.

Conclusion: ASCs isolated from lipoaspirates and stored for 24 hours at 4¡É have similar properties to ASCs isolated from fresh lipoaspirates. Our results suggest that ASCs can be isolated with high frequency by optimal storage at 4¡É for 24 hours, and those ASCs are highly proliferative and multipotent, similar to ASCs isolated from fresh lipoaspirates. These ASCs can be useful for clinical application because they are time- and cost-efficient, and these cells maintain their stemness for a long time, like ASCs isolated from fresh lipoaspirates.
KEYWORD
Lipoaspirates, adipose tissue, mesenchymal stem cell, proliferation, differentiation
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