Amylin isolated from pancreatic islet amyloid and pharmaceutical compositions comprising it

摘要

A synthetic peptide is provided having the amino acid sequence: KCNTATCATQRLANFLVHSSNNFGAILSSTNVGSNTY said peptide being carboxy terminally amidated and having a disulphide bond between the cysteine residues at positions 2 and 7. This is useful in treatment of diabetes mellitus. There is also provided a synthetic carboxy terminally amidated peptide which is a conservative variant of the above peptide. The peptide biological activity can be enhanced by refolding the peptide in a denaturing solution. If the peptide is produced in the form of pharmaceutical compositions, it can be obtained from the islet amyloid of diabetic pancreata by solubilising and successively subjecting to normal phase high performance liquid chromatography gel filtration and reverse phase high performance liquid chromatography followed by elution.