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Updated: May 26, 2026
Generation of Human Adipose Stem Cells through Dedifferentiation of Mature Adipocytes in Ceiling Cultures
Published on: March 7, 2015
New insights into epithelial differentiation of human adipose-derived stem cells
Patrick C Baer1, Claudia Döring, Martin-Leo Hansmann
1Division of Nephrology, Department of Internal Medicine III, Goethe-University, 60590 Frankfurt am Main, Germany. p.baer@em.uni-frankfurt.de
Abstract:
Although many studies using stem cells as therapeutic agents after renal failure have been published in recent years, our knowledge of the factors involved and the cellular mechanisms underlying their beneficial effect on organ regeneration is incomplete. A growing insight into these interactions would help to utilize the biological potential of stem cells for therapeutic approaches. It is here hypothesized that soluble factors released by tubular epithelial cells (TECs) induce epithelial differentiation in adipose-derived adult mesenchymal stem cells (ASCs). ASCs were therefore cultured in conditioned medium (CM) derived from TECs and the changes in expression genes towards an epithelial pattern were determined by microarray and qPCR analyses. The changes in gene expression were evaluated using Affymetrix HG-U133 Plus 2.0 arrays. Microarray-based screening revealed 117 genes differentially expressed in a significant manner after short-time incubation (3 days) of ASCs with CM, and four of these were solute carriers (SLCs). Changes in mRNA expression of these SLCs were verified by qPCR at several time points, additionally with four stem cell factors and five epithelial markers. qPCR analyses showed that expression of three of the SLCs rose significantly, whereas three of the four stem cell markers analysed decreased during 7 days of CM incubation. Moreover, a robust expression of three characteristic epithelial markers (cytokeratin 18, ZO-1 and ZO-2) was observed after 17 days. These changes in the expression patterns strongly indicate differentiation towards the epithelial lineage. The capability of ASCs to differentiate into epithelial cells may be important in organ repair mechanisms.
Insights
Soluble factors from kidney tubular epithelial cells (TECs) can induce differentiation in adipose-derived adult mesenchymal stem cells (ASCs). This suggests a potential mechanism for organ repair using stem cell therapy after renal failure.
Area of Science:
- Regenerative Medicine
- Stem Cell Biology
- Renal Physiology
Background:
- Current understanding of stem cell mechanisms in organ regeneration after renal failure is incomplete.
- Identifying factors that promote stem cell therapeutic potential is crucial for clinical applications.
Purpose of the Study:
- To investigate if soluble factors from tubular epithelial cells (TECs) induce epithelial differentiation in adipose-derived adult mesenchymal stem cells (ASCs).
- To explore the gene expression changes in ASCs when cultured with TEC-conditioned medium (CM).
Main Methods:
- ASCs were cultured in TEC-conditioned medium (CM).
- Gene expression analysis was performed using microarray (Affymetrix HG-U133 Plus 2.0) and quantitative PCR (qPCR).
- Changes in stem cell markers and epithelial markers were assessed over time.
Main Results:
- Microarray analysis identified 117 differentially expressed genes, including four solute carriers (SLCs), after 3 days of CM incubation.
- qPCR confirmed increased expression of three SLCs and decreased expression of three stem cell markers within 7 days.
- Robust expression of epithelial markers (cytokeratin 18, ZO-1, ZO-2) was observed after 17 days, indicating epithelial differentiation.
Conclusions:
- TEC-derived soluble factors promote the differentiation of ASCs towards an epithelial lineage.
- This epithelial differentiation capability of ASCs may play a significant role in renal organ repair mechanisms.
- Further research into these cellular interactions could optimize stem cell-based therapeutic strategies for kidney disease.
