Low pH Acts as Inhibitor of Membrane Damage Induced by Human Islet Amyloid Polypeptide

2011 ◽  
Vol 133 (39) ◽  
pp. 15598-15604 ◽  
Author(s):  
Lucie Khemtémourian ◽  
Elena Doménech ◽  
Jacques P. F. Doux ◽  
Martijn C. Koorengevel ◽  
J. Antoinette Killian
Keyword(s):  
Membrane Damage ◽  
Islet Amyloid Polypeptide ◽  
Low Ph ◽  
Human Islet ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide

scholarly journals Regulation of divalent metal ions to the aggregation and membrane damage of human islet amyloid polypeptide oligomers

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12815-12825
Author(s):  
Yajie Wang ◽  
Feihong Meng ◽  
Tong Lu ◽  
Chunyun Wang ◽  
Fei Li
Keyword(s):  
Metal Ions ◽  
Metal Binding ◽  
Membrane Damage ◽  
Islet Amyloid Polypeptide ◽  
Divalent Metal ◽  
Human Islet ◽  
Divalent Metal Ions ◽  
Islet Amyloid ◽  
Induced Membrane ◽  
Human Islet Amyloid Polypeptide

Their is a counteraction between a decrease in the disruptive ability of metal-associated oligomer species and an increase in the quantity of oligomers promoted by the metal binding in the activity of hIAPP induced membrane damage.

scholarly journals Membrane damage by human islet amyloid polypeptide through fibril growth at the membrane

2008 ◽  
Vol 105 (16) ◽  
pp. 6033-6038 ◽  
Author(s):  
M. F. M. Engel ◽  
L. Khemtemourian ◽  
C. C. Kleijer ◽  
H. J. D. Meeldijk ◽  
J. Jacobs ◽  
...  
Keyword(s):  
Membrane Damage ◽  
Islet Amyloid Polypeptide ◽  
Human Islet ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide

Myricetin protects pancreatic β-cells from human islet amyloid polypeptide (hIAPP) induced cytotoxicity and restores islet function

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Richa Dubey ◽  
Shruti H. Kulkarni ◽  
Sarath Chandra Dantu ◽  
Rajlaxmi Panigrahi ◽  
Devika M. Sardesai ◽  
...  
Keyword(s):  
Stress Reduction ◽  
Self Assembly ◽  
Membrane Damage ◽  
Islet Amyloid Polypeptide ◽  
Human Islet ◽  
Dynamics Simulation ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide

AbstractThe aberrant misfolding and self-assembly of human islet amyloid polypeptide (hIAPP)–a hormone that is co-secreted with insulin from pancreatic β-cells–into toxic oligomers, protofibrils and fibrils has been observed in type 2 diabetes mellitus (T2DM). The formation of these insoluble aggregates has been linked with the death and dysfunction of β-cells. Therefore, hIAPP aggregation has been identified as a therapeutic target for T2DM management. Several natural products are now being investigated for their potential to inhibit hIAPP aggregation and/or disaggregate preformed aggregates. In this study, we attempt to identify the anti-amyloidogenic potential of Myricetin (MYR)- a polyphenolic flavanoid, commonly found in fruits (like Syzygium cumini). Our results from biophysical studies indicated that MYR supplementation inhibits hIAPP aggregation and disaggregates preformed fibrils into non-toxic species. This protection was accompanied by inhibition of oxidative stress, reduction in lipid peroxidation and the associated membrane damage and restoration of mitochondrial membrane potential in INS-1E cells. MYR supplementation also reversed the loss of functionality in hIAPP exposed pancreatic islets via restoration of glucose-stimulated insulin secretion. Molecular dynamics simulation studies suggested that MYR molecules interact with the hIAPP pentameric fibril model at the amyloidogenic core region and thus prevents aggregation and distort the fibrils.

Human islet amyloid polypeptide accumulates at similar sites in islets of transgenic mice and humans

Diabetes ◽  
1994 ◽  
Vol 43 (5) ◽  
pp. 640-644 ◽  
Author(s):  
E. J. de Koning ◽  
J. W. Hoppener ◽  
J. S. Verbeek ◽  
C. Oosterwijk ◽  
K. L. van Hulst ◽  
...  
Keyword(s):  
Transgenic Mice ◽  
Islet Amyloid Polypeptide ◽  
Human Islet ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide

scholarly journals The flanking peptides issue from the maturation of the human islet amyloid polypeptide (hIAPP) slightly modulate hIAPP-fibril formation but not hIAPP-induced cell death

Biochimie ◽  
2020 ◽  
Vol 170 ◽  
pp. 26-35 ◽  
Author(s):  
Shadai Salazar Vazquez ◽  
Bertrand Blondeau ◽  
Pierre Cattan ◽  
Mathieu Armanet ◽  
Ghislaine Guillemain ◽  
...  
Keyword(s):  
Cell Death ◽  
Islet Amyloid Polypeptide ◽  
Fibril Formation ◽  
Human Islet ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide

scholarly journals Interactions of human islet amyloid polypeptide with lipid structure of different curvatures

2020 ◽  
Vol 10 (6) ◽  
pp. 412-418
Author(s):  
Le Mei ◽  
Wenhui Shen ◽  
Xuwei Wu ◽  
Jie Liu ◽  
Dechang Li ◽  
...  
Keyword(s):  
Islet Amyloid Polypeptide ◽  
Human Islet ◽  
Islet Amyloid ◽  
Lipid Structure ◽  
Human Islet Amyloid Polypeptide

scholarly journals Amyloidogenicity and Cytotoxicity of Recombinant Mature Human Islet Amyloid Polypeptide (rhIAPP)

2004 ◽  
Vol 279 (41) ◽  
pp. 42803-42810 ◽  
Author(s):  
Dahabada H. J. Lopes ◽  
Christian Colin ◽  
Theri L. Degaki ◽  
Ana Christina V. de Sousa ◽  
Marcelo N. N. Vieira ◽  
...  
Keyword(s):  
Islet Amyloid Polypeptide ◽  
Human Islet ◽  
Islet Amyloid ◽  
Human Islet Amyloid Polypeptide
Sign in / Sign up

Export Citation Format

Share Document