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Lookup NU author(s): Dr Gabriele Saretzki,
Professor Lyle Armstrong,
Professor Majlinda Lako,
Professor Thomas von Zglinicki
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A very small number of embryonic stem (ES) cells gives rise to all tissues of the embryo proper. This means that ES cells should be equipped with highly efficient mechanisms to defend themselves against various stresses and to prevent or repair DNA damage. One of these mechanisms is a high activity of a verapamil-sensitive multidrug efflux pump. Because reactive oxygen species are a major source of DNA damage, we further tested the idea that murine ES cells might differ from their more differentiated counterparts by high levels of antioxidant defense and good DNA strand break repair capacity. This was confirmed by comparing cellular peroxide levels, total antioxidant capacity, and activity of radiation-induced strand break repair between murine ES cells and embryoid bodies or embryonic fibroblasts. Using microarrays and confirmation by reverse transcription-polymerase chain reaction, we identified several candidate antioxidant and stress-resistance genes that become downregulated during differentiation of ES cells into embryoid bodies.
Author(s): Saretzki G, Armstrong L, Leake A, Lako M, Von Zglinicki T
Publication type: Article
Publication status: Published
Journal: Stem Cells
ISSN (print): 1066-5099
ISSN (electronic): 1549-4918
Publisher: AlphaMed Press, Inc.
PubMed id: 15536187
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