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Updated: Dec 18, 2025
Construction and Implantation of a Microinfusion System for Sustained Delivery of Neuroactive Agents.
Published on: March 17, 2008
Computationally Guided Intracerebral Drug Delivery via Chronically Implanted Microdevices
Khalil B Ramadi1, Ashvin Bashyam2, Chris J Frangieh2
1Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Harvard-MIT Health Sciences and Technology Division, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Computational mapping algorithms for neural drug delivery (COMMAND) improve brain targeting accuracy. This framework enables precise multi-bolus infusions, maximizing therapeutic coverage while minimizing off-target effects for neurologic disease treatments.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Pharmacology
Background:
- Neurologic disease treatments face efficacy challenges due to poor spatiotemporal drug delivery control.
- Direct intracerebral infusion improves delivery but struggles with precise targeting of irregularly shaped brain structures.
- Incomplete target coverage can lead to reduced therapeutic effects and increased toxicity.
Purpose of the Study:
- To present a computational mapping framework for neural drug delivery (COMMAND) to guide multi-bolus targeting.
- To maximize coverage of specific brain structures and minimize off-target leakage.
- To enable accurate and efficacious targeting of discrete brain regions for neurologic treatments.
Main Methods:
- Development of computational mapping algorithms for neural drug delivery (COMMAND).
- Custom-fabricated chronic neural implants for multi-bolus delivery in rodents.
- Utilized rational fluidic design and a single infusion of radioactive tracer (Cu-64).
- Positron emission tomography (PET) for in vivo spatial distribution analysis.
Main Results:
- The COMMAND framework successfully guided multi-bolus targeting in rodent models.
- In vivo spatial distributions replicated computed coverage with a 5% error.
- Demonstrated precise delivery to discrete brain regions using custom neural implants.
Conclusions:
- COMMAND provides a framework for accurate, efficacious targeting of brain structures.
- The system maximizes coverage and minimizes off-target leakage for improved neurologic therapies.
- This approach offers potential for enhanced treatment of neurologic diseases.
