Abstract: Isolated non-naturally occurring, mutant-human islet amyloid polypeptides (IAPP) polypeptides, which are more soluble at neutral pH than the wild-type human islet amyloid polypeptide (hIAPP) protein are disclosed. These polypeptides can be formulated or co-formulated at physiological pH, which enable the polypeptides to be delivered to a subject in a single injection with an insulin agent. Methods and pharmacological compositions for treating an abnormal condition, such as an amyloid-based disease or type-1 diabetes in a subject are also disclosed.

Abstract: The present disclosure provides for isolated non-naturally occurring, mutant-human IAPP polypeptides, which are more soluble at neutral pH than the wild-type hIAPP protein. These polypeptides can be formulated or co-formulated at physiological pH, which enable the polypeptides of the instant disclosure to be delivered to a subject in a single injection with an insulin agent. The present disclosure also provides methods and pharmacological compositions for treating an abnormal condition, such as an amyloid-based disease or type-1 diabetes in a subject.