Abstract:
:Islet amyloid polypeptide is a 37 amino acid hormone-like peptide which is the major protein component of islet amyloid deposits commonly found in patients with Type 2 (non-insulin-dependent) diabetes mellitus. Recent studies indicate that a physiologically active form of this peptide appears to be carboxyamidated and secreted from the insulin-producing beta cell. In order to clarify the possible in vivo actions of islet amyloid polypeptide, we have studied the effects of synthesized islet amyloid polypeptide-amide on peripheral glucose utilization by performing hyperinsulinaemic euglycaemic glucose clamp studies on dogs. Exogenously administered islet amyloid polypeptide-amide (an infusion from 1.0 to 100 micrograms.kg-1.h-1, over 2 h) inhibited the insulin-stimulated glucose disposal rate in a dose dependent manner. Twenty-five micrograms.kg-1.h-1 of islet amyloid polypeptide-amide infused via a peripheral vein significantly lowered the glucose disposal rate by 20% (from 17.4 +/- 1.7 to 14.4 +/- 1.7 mg.kg-1.min-1, n = 5, p less than 0.01). These findings suggest that islet amyloid polypeptide-amide causes peripheral insulin resistance in vivo.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Sowa R,Sanke T,Hirayama J,Tabata H,Furuta H,Nishimura S,Nanjo Kdoi
10.1007/BF00401051subject
Has Abstractpub_date
1990-02-01 00:00:00pages
118-20issue
2eissn
0012-186Xissn
1432-0428journal_volume
33pub_type
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