Mitochondrial‐Derived Vesicles: An Emerging Whisperer in Neurological Disorders

Mitochondrial dysfunction is a pivotal feature in the pathogenesis of various neurological and neurodegenerative disorders. The brain, with its high metabolic demands, is particularly vulnerable to impaired mitochondrial function, leading to oxidative stress, disturbed calcium homeostasis, and hyperactivated microglial responses. Mitochondrial disturbances majorly contribute to neuronal damage, synaptic dysfunction, and cognitive decline, making mitochondria a crucial target for therapeutic intervention in brain disorders. In this context, mitochondrial-derived vesicles (MDVs) are increasingly emerging as a novel aspect of mitochondrial biology with significant implications for brain health and disease. Prior to mitophagy, MDVs are released from stressed mitochondria, incorporating either healthy or damaged mitochondrial components as an earlier defense mechanism to maintain mitochondrial integrity and homeostasis. Furthermore, MDVs contribute to intercellular communication and extracellular neuroinflammation signaling, potentially influencing the progression of neurological disorders. This review provides a thorough overview of MDVs' subpopulations, highlighting the most recently reported MDVs roles across multiple neurological disorders and exploring their potential in diagnostic and therapeutic settings. Additionally, we further analyze the current limitations that hinder broader clinical applications of MDVs and present future perspectives and key recommendations to overcome these obstacles, aiming to enhance their effectiveness in diagnosis, therapy, and brain-targeted drug delivery.