The Genetic Basis and Molecular Mechanisms of Neurodegeneration

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Molecular and Translational Medicine".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 547

Special Issue Editor


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Guest Editor
Neurogenetics Laboratory Medical School, University of Crete, 71003 Heraklion, Greece
Interests: genetic basis and molecular mechanisms of neurodegeneration; Alzheimer’s disease; rare neurogenetic disorders; whole-exome sequencing analyses; neurogenetics; hereditary polyneuropathy; hereditary myopathy; hereditary dementia; tardbp; frontotemporal dementia; C9orf72; amyotrophic lateral sclerosis; MAPT; glutamate metabolism
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Special Issue Information

Dear Colleagues,

Neurodegenerative disorders include heterogeneous conditions such as Alzheimer’s disease; frontotemporal, Lewy body, and other dementias; Parkinson’s disease; amyotrophic lateral sclerosis; Huntington’s disease; and prion disorders. These disorders pose an important public health threat given their increasing prevalence due to population aging worldwide. This awareness has encouraged efforts to decipher the genetic and molecular mechanisms underlying these disorders with the aim of developing rational therapeutic approaches.

Despite their phenotypic diversity, neurodegenerative disorders frequently overlap on clinical grounds and share common pathophysiological mechanisms, such as protein misfolding, defective protein degradation, mitochondrial dysfunction, impaired axonal transport, DNA repeat expansions, DNA damage, excitotoxicity, oxidative stress, and aberrant programmed cell death. Accordingly, pathological studies have shown both distinct and common histological features in the brains of patients with neurodegenerative disorders. Concerning the genetic basis of these disorders, they are characterized by phenotypic and genotypic heterogeneity, with pathogenic or predisposing variants in a single gene associated with various phenotypes, and, on the other hand, a single phenotype caused by variants in different genes.

The aim of this Special Issue is to include studies that showcase both common and divergent aspects of neurodegenerative disorders, including their genetic and molecular basis, thus advancing knowledge in the field.

Dr. Ioannis V. Zaganas
Guest Editor

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Keywords

  • Alzheimer’s disease
  • amyotrophic lateral sclerosis
  • Huntington’s disease
  • prion disorders
  • protein misfolding
  • mitochondrial dysfunction
  • DNA damage
  • oxidative stress

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Published Papers (1 paper)

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Research

7 pages, 1942 KiB  
Article
Stability of the CAG Tract in the ATXN2 Gene Depends on the Localization of CAA Interruptions
by Oksana Lyasota, Anna Dorohova, Jose Luis Hernandez-Caceres, Alexandr Svidlov, Elena Tekutskaya, Mikhail Drobotenko and Stepan Dzhimak
Biomedicines 2024, 12(8), 1648; https://doi.org/10.3390/biomedicines12081648 - 24 Jul 2024
Viewed by 366
Abstract
It is known that the presence of CAA codons in the CAG tract affects the nature and time of disease onset caused by the expansion of trinucleotide repeats. The mechanisms leading to the occurrence of these diseases should be sought not only at [...] Read more.
It is known that the presence of CAA codons in the CAG tract affects the nature and time of disease onset caused by the expansion of trinucleotide repeats. The mechanisms leading to the occurrence of these diseases should be sought not only at the level of the physiological role of the ATXN2 protein, but also at the DNA level. These mechanisms are associated with non-canonical configurations (hairpins) that can form in the CAG tract. The tendency of hairpins to slide along the corresponding threads is usually considered important to explain the expansion of the CAG tract. At the same time, hairpins occur in areas of open states. Previous studies on the role of CAA interruptions have suggested that, under certain conditions, they can stabilize the dynamics of the hairpin, preventing the expansion of the CAG tract. We calculated the probability of additional open state zones occurrence in the CAG tract using an angular mathematical model of DNA. The calculations made it possible to establish that CAA interruptions affect the stability of the CAG tract, and this influence, depending on the localization of the interruption, can both increase and decrease the stability of the CAG tract. Full article
(This article belongs to the Special Issue The Genetic Basis and Molecular Mechanisms of Neurodegeneration)
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