Aug 2026· Frontiers in Pharmacology· 0 citations· 262 references
TL;DR
This integrated framework reframes PD as a disorder of impaired cellular maintenance rather than solely a consequence of late-stage degenerative processes, and provides a translational shift from mechanism-based biomarkers to early detection of mitochondrial failure and supports therapeutic strategies aimed at restoring mitochondrial function and resilience.
Abstract
Parkinson’s disease (PD) is traditionally described as a dopaminergic neurodegenerative disorder driven by α-synuclein aggregation and selective neuronal loss in the substantia nigra pars compacta. While this characterization captures the core clinical and pathological features, it does not fully explain disease initiation and progression. Converging evidence from human genetics, cellular and structural biology, and systems neuroscience now supports a unified framework in which PD results from the progressive erosion of mitochondrial resilience. Here, mitochondrial resilience denotes the capacity of neuronal mitochondrial networks to withstand stress and recover bioenergetic and cellular homeostasis through coordinated quality control, metabolic adaptation, and organelle communication. Rare, high-impact monogenic mutations in
PINK1
,
PRKN
(encoding Parkin), PARK7 (
DJ-1)
,
LRRK2
, and
SNCA
, along with common risk variants identified in genome-wide association studies, converge on interconnected pathways that govern mitochondrial quality control, bioenergetics, organelle dynamics, and cellular stress responses. These vulnerabilities are most pronounced in the highly energetic dopaminergic neurons of the substantia nigra, where sustained calcium cycling, high bioenergetic demand, and environmental stressors increase cellular susceptibility. Research has moved beyond early observations of respiratory chain impairment and oxidative stress to reveal context-specific disruptions in PINK1/Parkin-mediated mitophagy, lysosomal trafficking, mitochondrial-derived vesicle dynamics, and neuroimmune signaling. This integrated framework reframes PD as a disorder of impaired cellular maintenance rather than solely a consequence of late-stage degenerative processes. It provides a translational shift from mechanism-based biomarkers to early detection of mitochondrial failure and supports therapeutic strategies aimed at restoring mitochondrial function and resilience, offering a direct route to disease-modifying neuroprotection in PD and potentially other neurodegenerative disorders.
Astrocyte-specific mitochondrial dysfunctions and calcium dysregulation are identified as key features of LRRK2- and PRKN-related pathology, providing new insights into how glial metabolic alterations contribute to neurodegeneration in PD.
Giovanna C. Cavalcante, Camille C. Caldeira da Silva, É. Vogt et al.· bioRxiv· 0 citations
Alzheimer’s disease (AD), the most prevalent cause of dementia, lacks definitive cures despite decades of research focused on amyloid-beta (Aβ) and tau pathologies. Emerging evidence positions mitochondrial dysfunction not merely as a downstream consequence, but as the epicenter linking aging, metabolic failure, and neuroinflammation in AD pathogenesis. This study synthesizes the latest advances in mitochondrial-targeted therapies, framing them within a “Mitochondrial Ecological Restoration” perspective. I analyze the molecular mechanisms by which mitochondrial-targeted therapies modulate oxidative stress, mitochondrial dynamics, mitophagy and neuroinflammation, and evaluate their translational potential. Accumulating evidence indicates that strategies ranging from antioxidants (e.g., MitoQ) to mitophagy enhancement (e.g., Spautin-1) and biogenesis activation (e.g., PGC-1α Activator) have demonstrated efficacy in preclinical models. These interventions theoretically interrupt the pathological cycle between proteotoxicity and bioenergetic crisis. While challenges in blood-brain barrier (BBB) penetration and target specificity persist, the field is shifting from single-target scavenging to combinatorial ecosystem repair. Future success will require precise delivery systems, early biomarkers, and a paradigm shift toward treating the neuron as a metabolic ecosystem, though substantial translational challenges remain.
Dan-Dan Song· Frontiers in Cell and Develo...· 0 citations
The biomarker and therapeutic potential of STX1A remains preliminary because diagnostic performance, disease specificity, longitudinal stability, and causal relevance have not been adequately validated and future studies using cell-type-specific STX1A manipulation, rescue experiments, electrophysiology, and multicenter longitudinal cohorts are required to define the biological and clinical significance of STX1A in PD.
Rui Xu, Rui Li, Hongmei Li et al.· Frontiers in Aging Neuroscie...· 0 citations
Neurodegenerative diseases associated with ageing are characterized by progressive neuronal dysfunction and loss, yet effective disease-modifying therapies remain elusive. Increasing evidence indicates that mitochondrial dysfunction is not merely a downstream consequence of neurodegeneration but represents an early and active driver of disease initiation and progression. This review addresses this critical gap by establishing an integrated framework that systematically connects mechanistic insights with translational applications. We demonstrate that mitochondrial impairment precedes classical neuropathological hallmarks, thereby positioning mitochondrial dysfunction as a primary driver rather than a secondary consequence of neurodegeneration. Through comprehensive analysis of disease-specific molecular signatures, we reveal how distinct mitochondrial regulatory failures converge on common downstream pathways: bioenergetic collapse through respiratory chain complex deficiencies, oxidative stress amplification via mitochondrial DNA damage and reactive oxygen species overproduction, calcium dysregulation, and compromised quality control through impaired mitophagy. Critically, we integrate emerging evidence demonstrating bidirectional crosstalk between mitochondrial dysfunction and neuroinflammation, establishing a self-perpetuating pathogenic loop that accelerates disease progression. By synthesizing advances in multi-omics profiling, single-cell resolution analyses, and in vivo imaging biomarkers, we provide a systems-level perspective that transcends reductionist single-pathway models. Furthermore, we critically evaluate the translational landscape of mitochondria-targeted interventions, encompassing pharmacological agents with defined molecular targets, gene therapy approaches addressing mitochondrial DNA mutations, and lifestyle modifications promoting systemic metabolic resilience. Our comparative analysis reveals complementary mechanistic profiles and practical limitations across these modalities, supporting an integrated therapeutic paradigm that combines broad metabolic optimization with precision targeting of specific mitochondrial defects.
Zhaomin Yao, Yangwa Wei, Weiming Xie et al.· Ageing Research Reviews· 0 citations