The Cell and Molecular Biology of Neurodegenerative Diseases: An Overview
Bibliographic record
Abstract
In this research topic, the primary focus is on understanding the cellular and molecular mechanisms in the pathogenesis of different neurodegenerative disorders.These include Alzheimer's disease (AD), Parkinson's disease (PD), and polyglutamine (polyQ) expansion diseases.To date, no cure exists for these disorders and it is paramount that research efforts continue to focus on understanding the molecular underpinnings behind these disorders.This will enable better symptom-directed therapeutics and perhaps even curative treatments to be developed.Throughout this topic, it becomes evident that there are common cellular pathways that are altered in these disorders, including protein, mitochondrial, and transcriptional homeostasis.In the case of AD, it has become widely accepted that AD is a synaptopathy, meaning that there is a loss or damage of synapses.This damage to synapses leads to altered neuronal circuitry.The neuronspecific, post-synaptic protein, Arc, has gained recent attention for its contribution in the regulation of memory consolidation.Kerrigan and Randall (1) discuss how alterations of Arc protein in the brains of AD patients and animal models of AD may be a clue as to how synaptic transmission is altered in AD, and how this cellular pathway may be of interest for therapeutic development.The next three reviews discuss the molecular events underlying PD and how the normal function of specific proteins associated with PD can help shed light on the causes of familial and sporadic PD.Lim and Zhang (2) outline a range of studies that implicate aberrations in mitochondrial function and protein homeostasis, with oxidative stress as the possible link between these two.A review from Dr. Edward A. Fon's group complements this discussion by focusing on the structure and function of Parkin, PINK1, and DJ-1 as they relate to PD (3).The second review from Dr. Fon's group digs even deeper into the role of Parkin and PINK1 in mitophagy in neurons.They discuss the importance of research initiatives to better define the roles of these two proteins in mitophagy and, in particular, within the context of a neuronal setting (4).The next five reviews focus on polyQ expansion diseases.Almeida et al. (5) provide a structural and functional view of trinucleotide repeats and encoded homopeptide expansions, emphasizing polyQ expansions and their role in inducing the self-assembly, aggregation, and functional alterations of the protein, leading to neuronal toxicity and cell death.These authors focus on ataxin-3 and huntingtin (Htt), the main protein implicated in Machado-Joseph Disease (MJD) and Huntington's disease (HD) respectively.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.004 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.004 | 0.003 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".