Biomaterial Database

Hypocalcemic actions of amylin amide in humans. 1992

S J Wimalawansa, and R D Gunasekera, and H K Datta

Department of Chemical Pathology, Royal Postgraduate Medical School, London, England.

Amylin (also known as islet amyloid polypeptide and diabetes-associated peptide) has recently been shown by us to have a potent hypocalcemic effect in rat and rabbit owing to inhibition of osteoclast-mediated bone resorption. The hypocalcemic potency of amylin was found to be second only to that of calcitonin (CT) and is 100-fold more potent than calcitonin gene-related peptide. Here we demonstrate that amylin has a hypocalcemic effect in patients with Paget's disease of bone. Both human CT (hCT) and amylin induced a maximum hypocalcemic effect 2 h following intravenous administration of the peptides (p less than 0.001). Although on a molar basis amylin is less potent than CT, it exhibits a significantly prolonged hypocalcemic effect compared to hCT. Here we demonstrate for the first time a profound hypocalcemic effect of amylin in the human, despite sharing only 15% amino acid sequence identity with hCT.

UI	MeSH Term	Description	Entries
D010001	Osteitis Deformans	A disease marked by repeated episodes of increased bone resorption followed by excessive attempts at repair, resulting in weakened, deformed bones of increased mass. The resultant architecture of the bone assumes a mosaic pattern in which the fibers take on a haphazard pattern instead of the normal parallel symmetry.	Paget's Disease of Bone,Osseous Paget's Disease,Paget Disease of Bone,Paget Disease, Bone,Pagets Disease, Bone
D002116	Calcitonin	A peptide hormone that lowers calcium concentration in the blood. In humans, it is released by thyroid cells and acts to decrease the formation and absorptive activity of osteoclasts. Its role in regulating plasma calcium is much greater in children and in certain diseases than in normal adults.	Thyrocalcitonin,Calcitonin(1-32),Calcitrin,Ciba 47175-BA,Eel Calcitonin,Calcitonin, Eel,Ciba 47175 BA,Ciba 47175BA
D002118	Calcium	A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.	Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000682	Amyloid	A fibrous protein complex that consists of proteins folded into a specific cross beta-pleated sheet structure. This fibrillar structure has been found as an alternative folding pattern for a variety of functional proteins. Deposits of amyloid in the form of AMYLOID PLAQUES are associated with a variety of degenerative diseases. The amyloid structure has also been found in a number of functional proteins that are unrelated to disease.	Amyloid Fibril,Amyloid Fibrils,Amyloid Substance,Fibril, Amyloid,Fibrils, Amyloid,Substance, Amyloid
D058228	Islet Amyloid Polypeptide	A pancreatic beta-cell hormone that is co-secreted with INSULIN. It displays an anorectic effect on nutrient metabolism by inhibiting gastric acid secretion, gastric emptying and postprandial GLUCAGON secretion. Islet amyloid polypeptide can fold into AMYLOID FIBRILS that have been found as a major constituent of pancreatic AMYLOID DEPOSITS.	Amlintide,Amylin,IAPP Precursor,IAPP Protein,Insulinoma Amyloid Polypeptide,Insulinoma Amyloid Polypeptide Precursor,Islet Amyloid Polypeptide Precursor,Pancreatic Amylin,Amylin, Pancreatic,Amyloid Polypeptide, Insulinoma,Amyloid Polypeptide, Islet,Polypeptide, Insulinoma Amyloid,Polypeptide, Islet Amyloid