Research ArticleDrug Delivery

Miniaturized neural system for chronic, local intracerebral drug delivery

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Science Translational Medicine  24 Jan 2018:
Vol. 10, Issue 425, eaan2742
DOI: 10.1126/scitranslmed.aan2742

MiND(S)-controlled drug delivery

More effective and better-tolerated pharmacological therapies are needed for neurological disorders. Current treatments often rely on systemic administration, resulting in increased risk of toxicity and adverse effects due to off-target drug distribution. Dagdeviren et al. combined intracranial electroencephalogram (EEG) recording with drug delivery in a miniaturized implantable system called MiNDS. MiNDS achieved controlled drug delivery in deep brain structures with high temporal and spatial resolution while monitoring local neuronal activity in rodents and nonhuman primates. If adopted into clinical practice, MiNDS could improve therapeutic outcomes and minimize adverse effects over currently available drug delivery methods for neurological disorders.


Recent advances in medications for neurodegenerative disorders are expanding opportunities for improving the debilitating symptoms suffered by patients. Existing pharmacologic treatments, however, often rely on systemic drug administration, which result in broad drug distribution and consequent increased risk for toxicity. Given that many key neural circuitries have sub–cubic millimeter volumes and cell-specific characteristics, small-volume drug administration into affected brain areas with minimal diffusion and leakage is essential. We report the development of an implantable, remotely controllable, miniaturized neural drug delivery system permitting dynamic adjustment of therapy with pinpoint spatial accuracy. We demonstrate that this device can chemically modulate local neuronal activity in small (rodent) and large (nonhuman primate) animal models, while simultaneously allowing the recording of neural activity to enable feedback control.

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