scholarly journals PRION PROTEIN AND AMYLOID BETA PEPTIDE INTERACT IN THE YEAST SACCHAROMYCES CEREVISIAE

2012 ◽  
Vol 10 (1) ◽  
pp. 74-80
Author(s):  
Aleksander A. Rubel ◽  
Viktoria V. Korzhova ◽  
Alsu F. Saifitdinova ◽  
Kirill S. Antonez ◽  
Sergey G. Inge-Vechtomov ◽  
...  

SUMMARY: The possibility of interaction between Prion Protein and amyloid beta peptide in living cells of yeast Saccharomyces cerevisiae have been investigated by fluorescence 3D microscopy. Using the FR ET technique, it was shown that amyloid beta peptide and PrP interact in yeast cells. In the future, the yeast model can be used for investigation of the fine mechanisms of this interaction by fluorescence microscopy.

Author(s):  
Saurav Chakraborty ◽  
Jyothsna ThimmaReddygari ◽  
Divakar Selvaraj

The Alzheimer disease is a age related neurodegenerative disease. The factors causing alzheimer disease are numerous. Research on humans and rodent models predicted various causative factors involved in Alzheimer disease progression. Among them, neuroinflammation, oxidative stress and apoptosis play a major role because of accumulation of extracellular amyloid beta peptides. Here, the clearance of amyloid beta peptide plays a major role because of the imbalance in the production and clearance of the amyloid beta peptide. Additionally, neuroinflammation by microglia, astrocytes, cytokines, chemokines and the complement system also have a major role in Alzheimer disease. The physiological clearance pathways involved in amyloid beta peptide are glymphatic, vascular and immune pathways. Amyloid precursor protein, low density lipoprotein receptor-related protein 1, receptor for advanced glycation end product, apolipoprotein E, clusterin, aquaporin 4, auto-antibodies, complement system, cytokines and microglia are involved in amyloid beta peptide clearance pathways across the blood brain barrier. The plaque formation in the brain by alternative splicing of amyloid precursor protein and production of misfolded protein results in amyloid beta agglomeration. This insoluble amyloid beta leads to neurodegenerative cascade and neuronal cell death occurs. Studies had shown disturbed sleep may be a risk factor for dementia and cognitive decline. In this review, the therapeutic targets for alzheimer disease via focussing on pathways for amyloid beta clearance are discussed.


2009 ◽  
Vol 999 (999) ◽  
pp. 1-6 ◽  
Author(s):  
L. Millucci ◽  
L. Ghezzi ◽  
G. Bernardini ◽  
A. Santucci

Biomolecules ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 850
Author(s):  
Karolina Nowosad ◽  
Monika Sujka ◽  
Urszula Pankiewicz ◽  
Damijan Miklavčič ◽  
Marta Arczewska

The aim of the study was to investigate the influence of a pulsed electric field (PEF) on the level of iron ion accumulation in Saccharomyces cerevisiae cells and to select PEF conditions optimal for the highest uptake of this element. Iron ions were accumulated most efficiently when their source was iron (III) nitrate. When the following conditions of PEF treatment were used: voltage 1500 V, pulse width 10 μs, treatment time 20 min, and a number of pulses 1200, accumulation of iron ions in the cells from a 20 h-culture reached a maximum value of 48.01 mg/g dry mass. Application of the optimal PEF conditions thus increased iron accumulation in cells by 157% as compared to the sample enriched with iron without PEF. The second derivative of the FTIR spectra of iron-loaded and -unloaded yeast cells allowed us to determine the functional groups which may be involved in metal ion binding. The exposure of cells to PEF treatment only slightly influenced the biomass and cell viability. However, iron-enriched yeast (both with or without PEF) showed lower fermentative activity than a control sample. Thus obtained yeast biomass containing a high amount of incorporated iron may serve as an alternative to pharmacological supplementation in the state of iron deficiency.


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