NEURODEGENERATIVE DISEASE: Tau Protein Mutations Confirmed as Neuron Killers

Science ◽  
1998 ◽  
Vol 280 (5369) ◽  
pp. 1524-1525 ◽  
Author(s):  
G. Vogel
2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Lijun Zhang ◽  
Lei Dai ◽  
Deyuan Li

AbstractSelective autophagy is an evolutionarily conserved mechanism that removes excess protein aggregates and damaged intracellular components. Most eukaryotic cells, including neurons, rely on proficient mitophagy responses to fine-tune the mitochondrial number and preserve energy metabolism. In some circumstances (such as the presence of pathogenic protein oligopolymers and protein mutations), dysfunctional mitophagy leads to nerve degeneration, with age-dependent intracellular accumulation of protein aggregates and dysfunctional organelles, leading to neurodegenerative disease. However, when pathogenic protein oligopolymers, protein mutations, stress, or injury are present, mitophagy prevents the accumulation of damaged mitochondria. Accordingly, mitophagy mediates neuroprotective effects in some forms of neurodegenerative disease (e.g., Alzheimer's disease, Parkinson’s disease, Huntington's disease, and Amyotrophic lateral sclerosis) and acute brain damage (e.g., stroke, hypoxic–ischemic brain injury, epilepsy, and traumatic brain injury). The complex interplay between mitophagy and neurological disorders suggests that targeting mitophagy might be applicable for the treatment of neurodegenerative diseases and acute brain injury. However, due to the complexity of the mitophagy mechanism, mitophagy can be both harmful and beneficial, and future efforts should focus on maximizing its benefits. Here, we discuss the impact of mitophagy on neurological disorders, emphasizing the contrast between the positive and negative effects of mitophagy.


2018 ◽  
Vol 15 (10) ◽  
pp. 959-963 ◽  
Author(s):  
Ignazio Vecchio ◽  
Cristina Tornali ◽  
Giulia Malaguarnera ◽  
Nicola Luigi Bragazzi ◽  
Michele Malaguarnera

The progressive supranuclear palsy is a progressive neurodegenerative disease characterized by Parkinsonism, oculomotor abnormalities, early postural instability and cognitive impairment. Neurodegeneration in PSP is associated with tau protein, but the mechanisms by which tau abnormalities lead to cell dysfunction and death are not well understood. Neuro-behavioural problems related to the fear and loss of autonomy can determinate many bioethical implications. Careful planning involving patients’ families, academic and industry researchers were necessary to ensure improvement in quality of life.


2020 ◽  
Author(s):  
Travis B. Thompson ◽  
Pavanjit Chaggar ◽  
Ellen Kuhl ◽  
Alain Goriely ◽  

AbstractNeurodegenerative diseases such as Alzheimer’s or Parkinson’s are associated with the prion-like propagation and aggregation of toxic proteins. A long standing hypothesis that amyloid-beta drives Alzheimer’s disease has proven the subject of contemporary controversy; leading to new research in both the role of tau protein and its interaction with amyloid-beta. Conversely, recent work in mathematical modeling has demonstrated the relevance of nonlinear reaction-diffusion type equations to capture essential features of the disease. Such approaches have been further simplified, to network-based models, and offer researchers a powerful set of computationally tractable tools with which to investigate neurodegenerative disease dynamics.Here, we propose a novel, coupled network-based model for a two-protein system that includes an enzymatic interaction term alongside a simple model of aggregate transneuronal damage. We apply this theoretical model to test the possible interactions between tau proteins and amyloid-beta and study the resulting coupled behavior between toxic protein clearance and proteopathic phenomenology. Our analysis reveals ways in which amyloid-beta and tau proteins may conspire with each other to enhance the nucleation and propagation of different diseases, thus shedding new light on the importance of protein clearance and protein interaction mechanisms in prion-like models of neurodegenerative disease.Author SummaryIn 1906 Dr. Alois Alzheimer delivered a lecture to the Society of Southwest German Psychiatrists. Dr. Alzheimer presented the case of Ms. Auguste Deter; her symptoms would help to define Alzheimer’s disease (AD). Over a century later, with an aging world population, AD is at the fore of global neurodegenerative disease research. Previously, toxic amyloid-beta protein (Aβ) was thought to be the primary driver of AD development. Recent research suggests that another protein, tau, plays a fundamental role. Toxic tau protein contributes to cognitive decline and appears to interact with toxic Aβ; research suggests that toxic Aβ may further increase the effects of toxic tau.Theoretical mathematical models are an important part of neurodegenerative disease research. Such models: enable extensible computational exploration; illuminate emergent behavior; and reduce research costs. We have developed a novel, theoretical mathematical model of two interacting species of proteins within the brain. We analyze the mathematical model and demonstrate a computational implementation in the context of Aβ-tau interaction in the brain. Our model clearly suggests that: the removal rate of toxic protein plays a critical role in AD; and the Aβ-tau ‘conspiracy theory’ is a nuanced, and exciting path forward for Alzheimer’s disease research.


The Analyst ◽  
2014 ◽  
Vol 139 (11) ◽  
pp. 2823-2831 ◽  
Author(s):  
Jose O. Esteves-Villanueva ◽  
Hanna Trzeciakiewicz ◽  
Sanela Martic

Tau–tau binding induced electrostatic and conformational changes on the surface modulating the charge transfer resistance.


2006 ◽  
Vol 9 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Uta Keil ◽  
Susanne Hauptmann ◽  
Astrid Bonert ◽  
Isabel Scherping ◽  
Anne Eckert ◽  
...  

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Senjuti Banerjee ◽  
Sehnaz Ferdosh ◽  
Amar Nath Ghosh ◽  
Chandana Barat

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