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Directed engineering of umbilical cord blood stem cells to produce C-peptide and insulin

Lookup NU author(s): Dr Nicolas Forraz, Professor Colin McGuckin


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Objectives: In this study, we investigated the potential of umbilical cord blood stem cell lineages to produce C-peptide and insulin. Materials and methods: Lineage negative, CD133+ and CD34+ cells were analyzed by flow cytometry to assess expression of cell division antigens. These lineages were expanded in culture and subjected to an established protocol to differentiate mouse embryonic stem cells (ESCs) toward the pancreatic phenotype. Phase contrast and fluorescence immunocytochemistry were used to characterize differentiation markers with particular emphasis on insulin and C-peptide. Results: All 3 lineages expressed SSEA-4, a marker previously reported to be restricted to the ESC compartment. Phase contrast microscopy showed all three lineages recapitulated the treatment-dependent morphological changes of ESCs as well as the temporally restricted expression of nestin and vimentin during differentiation. After engineering, each isolate contained both C-peptide and insulin, a result also obtained following a much shorter protocol for ESCs. Conclusions: Since C-peptide can only be derived from de novo synthesis and processing of pre-proinsulin mRNA and protein, we conclude that these results are the first demonstration that human umbilical cord blood-derived stem cells can be engineered to engage in de novo synthesis of insulin. © 2007 Blackwell Publishing Ltd.

Publication metadata

Author(s): Denner L, Bodenburg Y, Zhao JG, Howe M, Cappo J, Tilton RG, Copland JA, Forraz N, McGuckin C, Urban R

Publication type: Article

Publication status: Published

Journal: Cell Proliferation

Year: 2007

Volume: 40

Issue: 3

Pages: 367-380

ISSN (print): 0960-7722

ISSN (electronic): 1365-2184

Publisher: Wiley-Blackwell Publishing Ltd.


DOI: 10.1111/j.1365-2184.2007.00439.x

PubMed id: 17531081


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