Related Experiment Video
Updated: Jan 31, 2026
Evaluation of Motor Impairment in C. elegans Models of Amyotrophic Lateral Sclerosis
Published on: September 2, 2021
Harnessing cellular aging in human stem cell models of amyotrophic lateral sclerosis
Oliver J Ziff1,2, Rickie Patani1,2
1The Institute of Neurology, University College London, London, UK.
Abstract:
Amyotrophic lateral sclerosis (ALS) is a relentlessly progressive neurodegenerative condition that is invariably fatal, usually within 3 to 5 years of diagnosis. The etiology of ALS remains unresolved and no effective treatments exist. There is therefore a desperate and unmet need for discovery of disease mechanisms to guide novel therapeutic strategies. The single major risk factor for ALS is aging, yet the molecular consequences of cell type-specific aging remain understudied in this context. Induced pluripotent stem cells (iPSCs) have transformed the standard approach of examining human disease, generating unlimited numbers of disease-relevant cells from patients, enabling analysis of disease mechanisms and drug screening. However, reprogramming patient cells to iPSCs reverses key hallmarks of cellular age. Therefore, although iPSC models recapitulate some disease hallmarks, a crucial challenge is to address the disparity between the advanced age of onset of neurodegenerative diseases and the fetal-equivalent maturational state of iPSC-derivatives. Increasing recognition of cell type-specific aging paradigms underscores the importance of heterogeneity in ultimately tipping the balance from a state of compensated dysfunction (clinically pre-symptomatic) to decompensation and progression (irreversible loss of neurological functions). In order to realize the true promise of iPSC technology in ALS, efforts need to prioritize faithfully recapitulating the clinical pathophysiological state, with proportionate emphasis on capturing the molecular sequelae of both cellular age and non-cell-autonomous disease mechanisms within this context.
Insights
Aging significantly impacts amyotrophic lateral sclerosis (ALS) pathogenesis. This study highlights the need to incorporate cellular aging into induced pluripotent stem cell (iPSC) models for better ALS research.
Area of Science:
- Neurodegenerative diseases
- Stem cell biology
- Aging research
Background:
- Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with unknown causes and no effective treatments.
- Aging is the primary risk factor for ALS, but its role in cell-specific aging and disease mechanisms is understudied.
- Induced pluripotent stem cells (iPSCs) offer a powerful tool for disease modeling but revert cellular age, creating a disparity with late-onset diseases like ALS.
Purpose of the Study:
- To address the challenge of recapitulating the aged cellular state in iPSC-derived models for ALS research.
- To emphasize the importance of cell type-specific aging and non-cell-autonomous mechanisms in ALS progression.
- To improve the fidelity of iPSC technology for understanding ALS pathophysiology and developing therapeutics.
Main Methods:
- Utilizing induced pluripotent stem cells (iPSCs) derived from ALS patients.
- Analyzing disease-relevant cells and their molecular characteristics.
- Investigating cell type-specific aging paradigms and their impact on disease progression.
Main Results:
- Reprogramming patient cells to iPSCs reverses key age-related cellular hallmarks.
- iPSC models currently do not fully capture the aged state relevant to ALS onset and progression.
- Cellular aging and heterogeneity are critical factors in the transition from compensated dysfunction to irreversible neurological loss.
Conclusions:
- Faithfully recapitulating the clinical and pathophysiological state of ALS in iPSC models is crucial.
- Future research must focus on incorporating the molecular consequences of cellular aging into iPSC-based ALS studies.
- Addressing the age disparity in iPSC derivatives is essential for realizing their full potential in ALS drug discovery and mechanism elucidation.
Related Concept Videos
01:33Adult Stem Cells
00:58Embryonic Stem Cells
00:57Embryonic Stem Cells
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
01:13Induced Pluripotent Stem Cells
01:28Lateralization
01:26Aging
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...