Thalamic Convection Enhanced Delivery for Widespread Cortical Therapy

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Solution Overview

Problem

The effective treatment of neurological disorders involving the cortex is hindered by the challenges of delivering therapeutic agents to affected cell populations, particularly in large brains like those of primates, where direct cortical infusions are ineffective due to the convoluted arrangement of the cerebral cortex.

Innovation Solution

Convection enhanced delivery (CED) of therapeutic agents to the thalamus, utilizing anterograde transport through primate thalamocortical projections, allows for widespread distribution to the cortex, obviating the need for direct cortical delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If direct cortical infusion is used to deliver therapeutic agents, then delivery to specific cortical nuclei can be reliably accomplished, but widespread cortical delivery becomes impossible in primates due to the extensive convoluted arrangement of the cerebral cortex

Engineering Contradiction:

Improvedelivery precision to specific nucleiVSAvoidcortical coverage area

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The thalamus serves as an intermediary structure that receives therapeutic agents via convection enhanced delivery and distributes them to widespread cortical regions through thalamocortical projections. This mediator approach allows precise delivery to the thalamus while achieving broad cortical coverage, resolving the contradiction between precision and area.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention transitions from direct cortical delivery (requiring multiple injection sites across the convoluted cortical surface) to thalamic delivery (accessing the cortex through a different anatomical dimension - the thalamocortical projection pathway). This dimensional shift enables both precision at the thalamic level and widespread distribution at the cortical level.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Area of stationary object

If multiple direct cortical infusions are used to achieve widespread delivery, then therapeutic coverage can be improved, but the complexity and difficulty of the procedure increases

Engineering Contradiction:

Improvecortical coverage areaVSAvoidnumber of infusion sites

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The invention merges the delivery function into a single thalamic injection site, combining what would otherwise require multiple separate cortical infusion procedures into one consolidated delivery approach. The thalamus acts as a convergence point that distributes therapy to multiple cortical regions simultaneously.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

By using the thalamus as an intermediary delivery hub, the procedure reduces complexity from multiple direct cortical infusions to a single thalamic infusion. The thalamus naturally projects to multiple cortical areas, providing widespread coverage through its inherent anatomical connections rather than requiring multiple surgical intervention points.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If direct cortical delivery is used, then therapeutic agents can be delivered to affected areas, but the convoluted arrangement of the primate cerebral cortex makes this difficult and limits distribution volume

Engineering Contradiction:

Improvetherapeutic agent distribution volumeVSAvoiddelivery difficulty

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The thalamus serves as an intermediary that simplifies delivery to the convoluted cortical surface. Instead of attempting to navigate the complex cortical architecture directly, the therapeutic agent is delivered to the thalamus and transported along well-established thalamocortical projection pathways, significantly reducing delivery difficulty while increasing distribution volume.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention replaces the mechanical approach of direct cortical injection (requiring precise navigation of convoluted tissue) with a biological transport system - utilizing the natural anterograde transport mechanisms of thalamocortical axons to deliver therapeutic agents throughout the cortex.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Achieves unprecedented volumes of therapeutic agent distribution in the primate cortex, effectively treating disorders affecting large cortical domains such as traumatic brain injury, stroke, and dementias, with a single administration to the thalamus.

Implementation Method 1

convection enhanced delivery (CED) of therapeutic agents to the thalamus

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 2

utilizing anterograde transport through primate thalamocortical projections

Methodology Applied

Scientific EffectAxonal transport:

Data Source

PatentUS12370270B2Methods for distributing high levels of therapeutic agent throughout the cortex to treat neurological disorders

Publication Date: 2025.07.29 RGT UNIV OF CALIFORNIA

AI summary

The invention provides methods for treating neurological disorders, which involve administering therapeutic agents to the thalamus by convection enhanced delivery.