alexa An immortalized drug-resistant cell line established from 12-13-day mouse embryos for the propagation of human embryonic stem cells.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Iuchi S, MarschMoreno M, VelezDelValle C, Easley K, KuriHarcuch W,

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Abstract Human embryonic stem (ES) cells are usually co-cultivated with supporting cells consisting of short-term cultures of fibroblasts (not an immortalized line) in a medium lacking serum. This method has promoted important progress in the field, but suffers from certain disadvantages. By serial cultivation for 27 consecutive transfers and about 63 cell generations, we have evolved an immortalized line from fibroblastic cells of 12-13-day mouse embryos. This line (MMM) supports the multiplication of H9 cells better than the 3T3 line. It supports the growth of H9 cells as well as do available short-term fibroblast cultures, but maintains more effectively the stem cell character of the H9 cells, judging by their better retention of Oct4. We have made MMM cells resistant to blasticidin and zeocin, the most efficient antibiotics for selection of stable transformants. In the presence of zeocin, the resistant MMM were able to support multiplication and selection of ES cells transfected with an exogenous gene encoding zeocin resistance. This article was published in Differentiation and referenced in Journal of Stem Cell Research & Therapy

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