Ferret islet amyloid polypeptide (IAPP): Characterization of in vitro and in vivo amyloidogenicity

Novo Nordisk A/S, Novo Nordisk Park, Måløv, Denmark.
Amyloid: the international journal of experimental and clinical investigation: the official journal of the International Society of Amyloidosis (Impact Factor: 2.01). 11/2011; 18(4):222-8. DOI: 10.3109/13506129.2011.627956
Source: PubMed


Diabetes in the domestic ferret (Mustela putorius furo) has previously been described and the purpose of this study was to evaluate if the ferret could serve as a model for the study of β-cell degeneration associated with formation of islet amyloid. The nucleotide and amino acid sequence of ferret islet amyloid polypeptide (IAPP) 1-37 was identified and the synthesized peptide was studied with regards to in vitro amyloidogenicity and potential cellular toxicity in a comparative approach to human, cat and the nonamyloidogenic rat IAPP. Ferret IAPP forms amyloid-like fibrils, but with a longer lag phase than human and cat IAPP and the aggregation process was shown to reduce cell viability of cultured β-cells, but with less potency than these two amyloidogenic counterparts. Immunohistochemistry of ferret pancreas confirmed IAPP expression in the islets of Langerhans, but no islet amyloid was found in a very limited sample size of one diabetic and five healthy ferrets. Islet amyloid has never been described in ferrets, and it is not possible to determine if it is due to lack of studies/material or to the fact that the ferret's life span is too short to present with such pathology.

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Available from: Marie-Odile Benoit-Biancamano, Feb 11, 2015
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    • "Amyloid can be detected in the islets of Langerhans in a majority of human and feline diabetes patients and it is also commonly seen in islet cell tumors in human and dogs (O'Brien et al., 1990; Kelley et al., 1996; Paulsson et al., 2011). It is identified as densely packed protein deposits with a very characteristic fibrillar ultrastructure; these deposits origin from islet amyloid polypeptide (IAPP). "
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