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TECHNOLOGY DEVELOPMENT

Nucleofection Is a Valuable Transfection Method for Transient and Stable Transgene Expression in Adipose Tissue-Derived Stem Cells

Institut de Recherche, Signalisation, Biologie du Développement et Cancer, UMR6543 Centre National de la Recherche Scientifique, Université Nice Sophia-Antipolis, Centre de Biochimie, Faculté des Sciences, Nice, France

Key Words. Adult stem cells • Adipose tissue • Nucleofection • Transgene expression • Transient • Stable • Secretion

Correspondence: Christian Dani, Ph.D., CNRS UMR6543, Centre de Biochimie, Faculté des Sciences, 06108 Nice Cedex 2, France. Telephone: +33 (0) 4 92 07 64 36; Fax: +33 (0)4 92 04 64 04; e-mail: dani{at}unice.fr

Received on April 19, 2006; accepted for publication on November 28, 2006.

First published online in STEM CELLS EXPRESS  December 7, 2006.


Adipose tissue-derived stem cells are a powerful tool for in vitro study of adult stem cell biology. So far, they have not been extensively used for gain or loss of function studies since they are resistant to most common transfection methods. Herein, we tested several classic transfection methods on human multipotent adipose tissue-derived stem (hMADS) cells. Our results showed that lipofectants and calcium phosphate were poorly efficient for transgene delivery in hMADS cells. In contrast, nucleofection, an electroporation-based method that is assumed to target plasmid DNA directly to the cell nucleus, led to a significant transient transgene expression in hMADS cells (up to 76% enhanced green fluorescent protein [EGFP]-positive cells were detected). Furthermore, after selection of hMADS cells that were nucleofected with a selectable plasmid coding for EGFP, stable EGFP expressing clones could be propagated in culture and efficiently induced to differentiate into EGFP-positive adipocytes and osteoblasts. Finally, we verified that nucleofected hMADS cells could produce a functional, transgene-encoded, secreted protein. To this aim, hMADS cells were nucleofected with a plasmid coding for leukemia inhibitory factor (LIF). This protein was detected at high concentrations in supernatants from pCAG-LIF transfected hMADS cells. Moreover, supernatants were able to maintain mouse embryonic stem cells' undifferentiated phenotype, indicating that hMADS cells could secrete a functional LIF protein. Taken together, our data demonstrate that nucleofection allows both transient and stable gene expression in adipose tissue-derived stem cells, without impairing their differentiation potential.

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