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    Protein Expr Purif. 2010 Jan;69(1):1-8. Epub 2009 Jul 25.

    Production and characterization of the recombinant Islet Neogenesis Associated Protein (rINGAP).

    Source

    Department of Surgery, McGill University, Montréal, Que., Canada H3G1A4. Beatrice.Assouline@mail.mcgill.ca

    Abstract

    Islet Neogenesis Associated Protein (INGAP) is implicated in pancreatic islet neogenesis. INGAP peptide, a pentadecapeptide comprising amino acids 104-118, reverses diabetes in rodents and improves glucose homeostasis in patients with diabetes. The mechanism of INGAP action is unknown, but such studies would benefit from the availability of the full-length recombinant protein (rINGAP). Here we report the production of rINGAP from 293-SF cells following lentiviral transduction, and its characterization by MALDI-TOF and Q-TOF Mass Spectrometry, and HPLC. Importantly, we show that rINGAP exhibits 100x the bioactivity of INGAP peptide on a molar basis in an in vitro assay of human islet regeneration.

    PMID:
    19635567
    [PubMed - indexed for MEDLINE]

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