An Inducible Expression System of the Calcium-Activated Potassium Channel 4 to Study the Differential Impact on Embryonic Stem Cells | Zendy

Stefan Liebau | Zendy; Michael Tischendorf | Zendy; Daniel Ansorge | Zendy; Leonhard Linta | Zendy; Marianne Stockmann | Zendy; Clair E. Weidgang | Zendy; Michelina Iacovino | Zendy; Tobias M. Boeckers | Zendy; Götz von Wichert | Zendy; Michael Kyba | Zendy; Alexander Kleger | Zendy

Open Access

An Inducible Expression System of the Calcium-Activated Potassium Channel 4 to Study the Differential Impact on Embryonic Stem Cells

Author(s) -

Stefan Liebau,

Michael Tischendorf,

Daniel Ansorge,

Leonhard Linta,

Marianne Stockmann,

Clair E. Weidgang,

Michelina Iacovino,

Tobias M. Boeckers,

Götz von Wichert,

Michael Kyba,

Alexander Kleger

Publication year - 2011

Publication title -

stem cells international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.205

H-Index - 64

eISSN - 1687-9678

pISSN - 1687-966X

DOI - 10.4061/2011/456815

Subject(s) - embryonic stem cell , stem cell , microbiology and biotechnology , doxycycline , potassium channel , cell , biology , calcium activated potassium channel , chemistry , gene , genetics , biophysics , antibiotics

Rationale. The family of calcium-activated potassium channels consists of four members with varying biological functions and conductances. Besides membrane potential modulation, SK channels have been found to be involved in cardiac pacemaker cell development from ES cells and morphological shaping of neural stem cells. Objective. Distinct SK channel subtype expression in ES cells might elucidate their precise impact during cardiac development. We chose SK channel subtype 4 as a potential candidate influencing embryonic stem cell differentiation. Methods. We generated a doxycycline inducible mouse ES cell line via targeted homologous recombination of a cassette expressing a bicistronic construct encoding SK4 and a fluorophore from the murine HPRT locus. Conclusion. We characterized the mouse ES cell line iSK4-AcGFP. The cassette is readily expressed under the control of doxycycline, and the overexpression of SK4 led to an increase in cardiac and pacemaker cell differentiation thereby serving as a unique tool to characterize the cell biological variances due to specific SK channel overexpression

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