Insulin Islet amyloid polypeptide (IAPP), also widely known as amylin, is a crucial 37-residue peptide hormone synthesized and co-secreted with insulin by the pancreatic beta cells. While IAPP plays a significant role in glucose homeostasis and energy regulation, its propensity to aggregate and form amyloid deposits within the pancreatic islets is strongly implicated in the pathogenesis of type 2 diabetes and the failure of islet cell transplants.Islet Amyloid Polypeptide: A Review of Its Biology and ... Understanding the structure, function, and pathological aggregation of IAPP is therefore vital for comprehending metabolic diseases and developing therapeutic strategiesThe role of amylin, a gut–brain axis hormone, in metabolic and ....
As a glucoregulatory peptide hormone, IAPP contributes to maintaining blood glucose levelsAmylin, or islet amyloid polypeptide(IAPP), is a 37-residue peptide hormone. It is co-secreted with insulin from the pancreatic β-cells in the ratio of .... It influences glucose metabolism by modulating insulin secretion, affecting gastric emptying, and suppressing glucagon release. This intricate interplay with insulin highlights IAPP's importance in the coordinated regulation of energy balance. However, under certain conditions, IAPP undergoes misfolding and aggregation, forming insoluble amyloid fibrils.Analysis of the Minimal Amyloid-forming Fragment of ... These fibrils accumulate in the islets of Langerhans, leading to cellular dysfunction and eventual beta cell death, a hallmark of type 2 diabetes.
The formation of islet amyloid is a significant pathological feature observed in the majority of individuals with type 2 diabetes. The aggregated IAPP peptides are believed to exert toxicity through various mechanisms, including disruption of cell membranes, induction of oxidative stress, and promotion of inflammation within the pancreatic islets. This progressive destruction of insulin-producing beta cells severely impairs the body's ability to produce and utilize insulin effectively, exacerbating hyperglycemia. The link between islet amyloid polypeptide and type 2 diabetes is a focal point of research, aiming to elucidate the precise molecular mechanisms driving IAPP aggregation and its toxic consequences.作者：D Bretherton-Watt·1991·被引用次数：12—Islet amyloid polypeptide(IAPP or amylin), first identified as the peptide deposited as amyloid in type-2 diabetic pancreas and insulinoma, turns out to be ...
Human islet amyloid polypeptide (hIAPP) is a 37-amino acid polypeptide that shares some structural similarities with calcitonin gene-related peptide. Its aggregation process is complex and influenced by factors such as pH, temperature, and the presence of other molecules. Research into the structural dynamics of IAPP, including the assembly of its fibrillar forms, provides critical insights into how these peptides transition from soluble, functional hormones to pathological aggregates. Understanding these interactions is key to designing interventions that can prevent or reverse amyloid formation.
The study of islet amyloid polypeptide extends to its potential interactions with other amyloidogenic proteins, such as amyloid beta (Aβ) peptide, which is implicated in Alzheimer's disease. Investigations into these cross-interactions may reveal common pathways in protein misfolding diseases.作者：R Azriel·2001·被引用次数：496—The islet amyloid fibrils consist predominantly of theislet amyloid polypeptide(IAPP1or amylin), a 37-amino acid polypeptide hormone that is produced by ... Furthermore, hIAPP can be used as a high-quality epitope peptide for stimulating antigen-specific T cells in immunological assays, contributing to a deeper understanding of immune responses related to pancreatic beta cells.
In conclusion, islet amyloid polypeptide (IAPP) is a fascinating molecule with a dual identity: a vital regulator of glucose metabolism and a key contributor to the pathology of type 2 diabetes. Continued research into its structure, aggregation properties, and toxic mechanisms holds significant promise for developing novel therapeutic approaches to combat this widespread metabolic disorder.
Join the newsletter to receive news, updates, new products and freebies in your inbox.