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Stem Cell Reviews and Reports

, Volume 8, Issue 1, pp 116–127 | Cite as

Identification of Specific Pluripotent Stem Cell Death—Inducing Small Molecules by Chemical Screening

  • Celia Conesa
  • Michael Xavier Doss
  • Charles Antzelevitch
  • Agapios Sachinidis
  • Javier Sancho
  • José Alberto Carrodeguas
Article

Abstract

A potential application of embryonic and inducible pluripotent stem cells for the therapy of degenerative diseases involves pure somatic cells, free of tumorigenic undifferentiated embryonic and inducible pluripotent stem cells. In complex collections of chemicals with pharmacological potential we expect to find molecules able to induce specific pluripotent stem cell death, which could be used in some cell therapy settings to eliminate undifferentiated cells. Therefore, we have screened a chemical library of 1120 small chemicals to identify compounds that induce specifically apoptotic cell death in undifferentiated mouse embryonic stem cells (ESCs). Interestingly, three compounds currently used as clinically approved drugs, nortriptyline, benzethonium chloride and methylbenzethonium chloride, induced differential effects in cell viability in ESCs versus mouse embryonic fibroblasts (MEFs). Nortriptyline induced apoptotic cell death in MEFs but not in ESCs, whereas benzethonium and methylbenzethonium chloride showed the opposite effect. Nortriptyline, a tricyclic antidepressant, has also been described as a potent inhibitor of mitochondrial permeability transition, one of two major mechanisms involved in mitochondrial membrane permeabilization during apoptosis. Benzethonium chloride and methylbenzethonium chloride are quaternary ammonium salts used as antimicrobial agents with broad spectrum and have also been described as anticancer agents. A similar effect of benzethonium chloride was observed in human induced pluripotent stem cells (hiPSCs) when compared to both primary human skin fibroblasts and an established human fibroblast cell line. Human fibroblasts and hiPSCs were similarly resistant to nortriptyline, although with a different behavior. Our results indicate differential sensitivity of ESCs, hiPSCs and fibroblasts to certain chemical compounds, which might have important applications in the stem cell-based therapy by eliminating undifferentiated pluripotent stem cells from stem cell-derived somatic cells to prevent tumor formation after transplantation for therapy of degenerative diseases.

Keywords

Embryonic stem cells Induced pluripotent stem cells Fibroblasts Chemical screening Small molecules Apoptosis Teratoma Nortriptyline Benzethonium 

Notes

Acknowledgements

We thank Jesús Martínez de la Fuente, from the Instituto de Nanociencia de Aragón, for access to the inverted fluorescence microscope. This work was funded by grants from the Aragon Institute of Health Sciences to J. Sancho (PIPAMER07/02) and to J. A. Carrodeguas (PIPAMER08/17, PIPAMER09/13 and PIPAMER10/009); from the University of Zaragoza to J. A. Carrodeguas (UZ2010-BIO-03); from the Ministerio de Educación y Ciencia to J. A. Carrodeguas (BFU2006-07026); from the Ministerio de Ciencia e Innovación to J. Sancho (PI078/08 and BFU2010-16297) and to J. A. Carrodeguas (BFU2009-11800). The contribution by C. Antzelevitch and MX. Doss was supported by grant HL47678 (CA) from NHLBI, and grants from NYSTEM (CA), AHA National Scientist Development grant (MXD) and New York State and Florida Masons. C. Conesa is a postdoctoral fellow funded by the Programa Aragonés de Medicina Regenerativa (PAMER) and by the Institute of Biocomputation and Physics of Complex Systems.

Conflicts of interest

The authors declare no potential conflicts of interest.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Celia Conesa
    • 1
    • 2
  • Michael Xavier Doss
    • 3
  • Charles Antzelevitch
    • 3
  • Agapios Sachinidis
    • 4
  • Javier Sancho
    • 2
    • 5
  • José Alberto Carrodeguas
    • 1
    • 2
    • 5
  1. 1.Aragon Health Sciences Institute (I+CS)ZaragozaSpain
  2. 2.Institute for Biocomputation and Physics of Complex SystemsUniversity of ZaragozaZaragozaSpain
  3. 3.Stem Cell Center, Masonic Medical Research LaboratoryUticaUSA
  4. 4.Center of Physiology and Pathophysiology, Institute of NeurophysiologyUniversity of CologneCologneGermany
  5. 5.Department of Biochemistry and Molecular and Cellular Biology, School of SciencesUniversity of ZaragozaZaragozaSpain

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