A Purification Technique for Adipose-Derived Stromal Cell Cultures Leads to a More Regenerative Cell Population

Renee F. Conway, Kevin M. Okarski, John Szivek

Research output: Contribution to journalArticle

Abstract

It has been demonstrated that adipose-derived stromal cells (ASCs) are a regenerative cell population with potential uses for bone and cartilage regeneration. However, the biomarker expression and heterogeneity of the population has not been thoroughly characterized. By analyzing biomarker expression, we aimed to understand the composition of ASC populations extracted using a common extraction technique in comparison to ASC populations given an additional purification step. Human adipose tissue samples were collected, and ASCs were extracted from these samples using a common, published extraction technique (primary extraction). These cells were cultured and half were given an additional purification. The primarily-extracted and purified cell populations were analyzed for biomarkers that correspond to specific cell types. The addition of the purification technique reduced the number of cells expressing hematopoietic and endothelial biomarkers and did not cause the yield of mesenchymal stem cell biomarker-expressing cells to decrease. Biomarkers corresponding to erythrocytes and lymphocytes were lost during the primary extraction, and biomarkers corresponding to most granulocytes and progenitor cells were lost during the additional purification. Biomarkers identifying dendritic cells, monocytes/macrophages, neutrophils, vascular endothelial cells, smooth muscle cells, and pericytes were upregulated in purified cell populations while those identifying fibroblasts and adipocytes were downregulated. Pluripotency biomarkers were more highly expressed in purified cell populations. These results demonstrate that the most commonly utilized adipose tissue recovery and ASC extraction technique leads to a heterogeneous cell population in which further purification of this population, as described in this manuscript, isolates a cell subset that has more regenerative potential.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalJournal of Investigative Surgery
DOIs
StateAccepted/In press - Jan 31 2018

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Stromal Cells
Cell Culture Techniques
Biomarkers
Population
Adipose Tissue
Granulocyte Precursor Cells
Pericytes
Bone Regeneration
Population Characteristics
Mesenchymal Stromal Cells
Adipocytes
Dendritic Cells
Cartilage
Smooth Muscle Myocytes
Monocytes
Cultured Cells
Neutrophils
Down-Regulation
Endothelial Cells
Fibroblasts

Keywords

  • adipose-derived stromal cells
  • biomarkers
  • isolation
  • mesenchymal stem cells
  • purification

ASJC Scopus subject areas

  • Surgery

Cite this

A Purification Technique for Adipose-Derived Stromal Cell Cultures Leads to a More Regenerative Cell Population. / Conway, Renee F.; Okarski, Kevin M.; Szivek, John.

In: Journal of Investigative Surgery, 31.01.2018, p. 1-12.

Research output: Contribution to journalArticle

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