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Long-acting nanomedicine for brain diseases.

Jun Liao,Qi Huang,Ruiyu Li,Lidong Gong,Tiancheng Li,Zhiqiang Lin

Published 2026 in Journal of Controlled Release

ABSTRACT

Effective pharmacological management of neurological disorders is profoundly limited by the blood-brain barrier (BBB) and the short biological half-life of therapeutics, necessitating frequent and invasive administration. Long-acting drug delivery systems (LADDS) integrated with nanotechnology offer a transformative paradigm to overcome these challenges. This review discusses the key principles and nanoplatforms enabling sustained brain drug delivery to the central nervous system. Key release mechanisms are analyzed including diffusion, degradation, and stimuli-responsiveness which alongside a survey of major nanocarrier platforms, designed to achieve controlled pharmacokinetics and enhanced BBB penetration. Recent groundbreaking applications in preclinical models of ischemic stroke, Alzheimer's disease, glioma, and traumatic brain injury are highlighted, where LADDS provide continuous, localized neuroprotection and modulate chronic pathology. Finally, the significant translational challenges, including long-term biocompatibility, manufacturing scalability, and regulatory hurdles, are critically evaluated. The future trajectory of the field points toward intelligent and personalized systems, integrating AI-driven design, bioresponsive materials, refillable depots, and bioelectronic hybrids. LADDS are poised to redefine neuropharmacology, shifting the focus from transient symptom management to precise, durable, and restorative intervention for chronic brain diseases.

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