نتایج جستجو برای: islet amyloid polypeptide

تعداد نتایج: 80109  

Journal: :The Journal of clinical investigation 2014
Jinyoung Kim Hwanju Cheon Yeon Taek Jeong Wenying Quan Kook Hwan Kim Jae Min Cho Yu-Mi Lim Seung Hoon Oh Sang-Man Jin Jae Hyeon Kim Moon-Kyu Lee Sunshin Kim Masaaki Komatsu Sang-Wook Kang Myung-Shik Lee

Islet amyloid accumulation is a hallmark of human type 2 diabetes (T2D). In contrast to human islet amyloid polypeptide (hIAPP), murine islet amyloid polypeptide (mIAPP) does not exhibit amyloidogenic propensity. Because autophagy is important in the clearance of amyloid-like proteins, we studied transgenic mice with β cell-specific expression of hIAPP to evaluate the contribution of autophagy ...

2014
Ling-Hsien Tu Harris Noor Ping Cao Daniel P. Raleigh

The loss of β-cell function and β-cell death are key features of diabetes. A range of mechanisms are thought to contribute to β-cell loss, including islet amyloid formation by the neuropancreatic hormone amylin (islet amyloid polypeptide, IAPP). Islet amyloid deposition also contributes to the failure of islet transplants. There are no therapeutic strategies for the treatment or prevention of i...

2016
Praveen Nedumpully-Govindan Aleksandr Kakinen Emily H. Pilkington Thomas P. Davis Pu Chun Ke Feng Ding

Experimental studies have shown that many naturally occurring polyphenols have inhibitory effect on the aggregation of several proteins. Here, we use discrete molecular dynamics (DMD) simulations and high-throughput dynamic light scattering (DLS) experiments to study the anti-aggregation effects of two polyphenols, curcumin and resveratrol, on the aggregation of islet amyloid polypeptide (IAPP ...

Journal: :Diabetes 2001
F Wang R L Hull J Vidal M Cnop S E Kahn

Islet amyloid occurs in >90% of type 2 diabetic patients and may play a role in the pathogenesis of this disease. To determine whether islet amyloid occurs diffusely throughout the pancreas, whether it affects islets equally, and whether it decreases islet endocrine cells, we characterized islet amyloidosis by computerized fluorescence microscopy in transgenic mice that develop typical islet am...

Journal: :American journal of physiology. Endocrinology and metabolism 2004
Sofianos Andrikopoulos Rebecca L Hull C Bruce Verchere Feng Wang Shani M Wilbur Thomas N Wight Lucy Marzban Steven E Kahn

Pancreatic amyloid is found in patients with insulinomas and type 2 diabetes. To study mechanisms of islet amyloidogenesis, we produced transgenic mice expressing the unique component of human islet amyloid, human islet amyloid polypeptide (hIAPP). These mice develop islet amyloid after 12 mo of high-fat feeding. To determine whether we could accelerate the rate of islet amyloid formation, we c...

Journal: :American journal of physiology. Cell physiology 2007
Rebecca L Hull Sakeneh Zraika Jayalakshmi Udayasankar Robert Kisilevsky Walter A Szarek Thomas N Wight Steven E Kahn

Deposition of islet amyloid polypeptide (IAPP) as amyloid in the pancreatic islet occurs in approximately 90% of individuals with Type 2 diabetes and is associated with decreased islet beta-cell mass and function. Human IAPP (hIAPP), but not rodent IAPP, is amyloidogenic and toxic to islet beta-cells. In addition to IAPP, islet amyloid deposits contain other components, including heparan sulfat...

Emanuela Martinuzzi Fathollah Kalantar Mohammad Hossein Dabbaghmanesh Mohsen Moghadami Zahra Amirghofran,

Background: Type 2 diabetes (T2D) is a chronic metabolic disorder in which beta-cells are destroyed. The islet amyloid polypeptide (IAPP) produced by beta-cells has been reported to influence beta-cell destruction. Objective: To evaluate if IAPP can act as an autoantigen and therefore, to see if CD8 + T-cells specific for this protein might be present in T2D patients. Methods: Peripheral blood ...

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