scholarly journals The Cascade of Oxidative Stress and Tau Protein Autophagic Dysfunction in Alzheimer’s Disease

Author(s):  
Zhenzhen Liu ◽  
Peifu Li ◽  
Jiannan Wu ◽  
Yi Wang ◽  
Ping Li ◽  
...  
Antioxidants ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 146
Author(s):  
Ryszard Pluta ◽  
Jacek Kiś ◽  
Sławomir Januszewski ◽  
Mirosław Jabłoński ◽  
Stanisław J. Czuczwar

Recent years have seen remarkable progress in research into free radicals oxidative stress, particularly in the context of post-ischemic recirculation brain injury. Oxidative stress in post-ischemic tissues violates the integrity of the genome, causing DNA damage, death of neuronal, glial and vascular cells, and impaired neurological outcome after brain ischemia. Indeed, it is now known that DNA damage and repair play a key role in post-stroke white and gray matter remodeling, and restoring the integrity of the blood-brain barrier. This review will present one of the newly characterized mechanisms that emerged with genomic and proteomic development that led to brain ischemia to a new level of post-ischemic neuropathological mechanisms, such as the presence of amyloid plaques and the development of neurofibrillary tangles, which further exacerbate oxidative stress. Finally, we hypothesize that modified amyloid and the tau protein, along with the oxidative stress generated, are new key elements in the vicious circle important in the development of post-ischemic neurodegeneration in a type of Alzheimer’s disease proteinopathy.


2015 ◽  
Vol 11 (7S_Part_14) ◽  
pp. P651-P652
Author(s):  
Eduardo de SouzaS. Nicolau ◽  
Ana Paula Mendes Silva ◽  
Kenia Kelly Fiaux do Nascimento ◽  
Kelly Silva Pereira ◽  
Gizele Ribeiro dos Santos ◽  
...  

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Siddhartha Mondragón-Rodríguez ◽  
George Perry ◽  
Xiongwei Zhu ◽  
Paula I. Moreira ◽  
Mariana C. Acevedo-Aquino ◽  
...  

Alzheimer’s disease (AD) is defined by the concurrence of abnormal aggregates composed of phosphorylated tau protein and of abnormal cellular changes including neurite degeneration, loss of neurons, and loss of cognitive functions. While a number of mechanisms have been implicated in this complex disease, oxidative stress remains one of the earliest and strongest events related to disease progression. However, the mechanism that links oxidative stress and cognitive decline remains elusive. Here, we propose that phosphorylated tau protein could be playing the role of potential connector and, therefore, that a combined therapy involving antioxidants and check points for synaptic plasticity during early stages of the disease could become a viable therapeutic option for AD treatment.


Oxygen ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 96-120
Author(s):  
Anna Atlante ◽  
Daniela Valenti ◽  
Valentina Latina ◽  
Giuseppina Amadoro

Oxygen free radical burst is a prominent early event in the pathogenesis of Alzheimer’s disease (AD). Posttranslational modifications of Tau protein, primarily hyper-phosphorylation and truncation, are indicated as critical mediators of AD pathology. This finding is confirmed by the high levels of oxidative stress markers and by the increased susceptibility to oxygen radicals found in cultured neurons and in brains from transgenic animal models expressing toxic Tau forms, in concomitance with a dramatic reduction in their viability/survival. Here, we collect the latest progress in research focused on the reciprocal and dynamic interplay between oxygen radicals and pathological Tau, discussing how these harmful species cooperate and/or synergize in the progression of AD. In this context, a better understanding of the role of oxidative stress in determining Tau pathology, and vice versa, primarily could be able to define novel biomarkers of early stages of human tauopathies, including AD, and then to develop therapeutic strategies aimed at attenuating, halting, or reversing disease progression.


2013 ◽  
Vol 20 (37) ◽  
pp. 4648-4664 ◽  
Author(s):  
S. Chakrabarti ◽  
M. Sinha ◽  
I. Thakurta ◽  
P. Banerjee ◽  
M. Chattopadhyay

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