نتایج جستجو برای: islet amyloid polypeptide

تعداد نتایج: 80109  

Journal: :Journal of Biological Chemistry 2012

2014
Hui Wang Daniel P. Raleigh

Islet amyloid polypeptide (IAPP) is responsible for amyloid deposition in type 2 diabetes and plays an important role in the loss of β-cell mass associated with the disease and in the failure of islet transplants, but the mechanism of islet amyloid formation is not understood. The incorrect processing of proIAPP to produce partially processed forms of the peptide has been proposed to play a rol...

Journal: :American journal of physiology. Endocrinology and metabolism 2005
Rebecca L Hull Melissah R Watts Keiichi Kodama Zhen-ping Shen Kristina M Utzschneider Darcy B Carr Josep Vidal Steven E Kahn

Genetic background is important in determining susceptibility to metabolic abnormalities such as insulin resistance and beta-cell dysfunction. Islet amyloid is associated with reduced beta-cell mass and function and develops in the majority of our C57BL/6J x DBA/2J (F(1)) male human islet amyloid polypeptide (hIAPP) transgenic mice after 1 yr of increased fat feeding. To determine the relative ...

2007
Chia-Yu Lin Tatyana Gurlo Rakez Kayed Alexandra E. Butler Leena Haataja Charles G. Glabe Peter C. Butler

OBJECTIVE—Islets in type 2 diabetes are characterized by a deficit in -cells, increased -cell apoptosis, and islet amyloid derived from islet amyloid polypeptide (IAPP). The toxic form of amyloidogenic protein oligomers are distinct and smaller than amyloid fibrils and act by disrupting membranes. Using antibodies that bind to toxic IAPP oligomers (but not IAPP monomers or fibrils) and a vaccin...

2012
Casey Zelus Ayano Fox Anastasia Calciano Bianca S Faridian Luiza A Nogaj David A Moffet

The aggregation of the amyloidogenic polypeptide IAPP (Islet Amyloid Polypeptide, amylin) is believed to play a direct role in the death of pancreatic β-islet cells in type II diabetes. Preventing the initial aggregation event of IAPP is one strategy for slowing, and possibly preventing, the progression of this disease. Here, we investigate myricetin's potential as an inhibitor of IAPP aggregat...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
K J Potter A Abedini P Marek A M Klimek S Butterworth M Driscoll R Baker M R Nilsson G L Warnock J Oberholzer S Bertera M Trucco G S Korbutt P E Fraser D P Raleigh C B Verchere

Islet transplantation is a promising treatment for diabetes but long-term success is limited by progressive graft loss. Aggregates of the beta cell peptide islet amyloid polypeptide (IAPP) promote beta cell apoptosis and rapid amyloid formation occurs in transplanted islets. Porcine islets are an attractive alternative islet source as they demonstrate long-term graft survival. We compared the c...

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