SPG Stimulation for Reversible Blood-Brain Barrier Opening
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Solution Overview
Problem
The blood-brain barrier (BBB) poses a challenge in the treatment of neurological disorders by limiting the delivery of drugs to the brain, as it restricts the passage of large molecules and immune cells, hindering effective therapeutic interventions.
Innovation Solution
A method and system utilizing electrical, ultrasound, or chemical stimulation to modulate the porosity of the BBB, allowing selective delivery and subsequent closure of active agents, such as drugs, across the barrier, and optionally enhancing the function of the BBB without active agents for diagnostic or therapeutic purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the BBB is made more permeable to enable drug delivery, then therapeutic agents can cross into brain tissue, but the protective function of the barrier is compromised
Solution Approach 1:
The BBB permeability is dynamically modulated through electrical stimulation of the trigeminal nerve, allowing the barrier to transition between closed and open states. This dynamic control enables temporary, reversible opening of the BBB for drug delivery while maintaining its protective function during closed states, resolving the contradiction between enhanced drug delivery and barrier protection.
Solution Approach 2:
The system employs periodic electrical stimulation to rhythmically open and close the BBB. By applying stimulation in controlled cycles, therapeutic agents can be delivered during open phases while the barrier restores its protective function during closed phases, achieving both improved drug delivery and maintained barrier reliability through time-dependent modulation.
2Productivity
If stimulation is applied to open the BBB, then porosity increases enabling active agent passage, but uncontrolled opening may allow harmful substances to pass
Solution Approach 1:
The system incorporates feedback mechanisms through programmable stimulation parameters and timing control. By monitoring stimulation delivery and adjusting the timing, duration, and intensity of electrical pulses, the system controls BBB opening in a regulated manner, ensuring active agents are delivered during controlled open states while preventing uncontrolled passage of harmful substances.
Solution Approach 2:
The system applies preliminary electrical stimulation to open the BBB before administering therapeutic agents. This preliminary action ensures the barrier is intentionally opened under controlled conditions, allowing subsequent drug delivery during the open state while preventing uncontrolled substance passage that would occur without prior controlled opening.
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
Enables targeted delivery of therapeutic agents to the brain while maintaining the barrier's protective function, facilitating treatments for neurological disorders and enhancing diagnostic procedures by controlling the permeability of the BBB.
Implementation Method 1
stimulation (e.g., electrical stimulation), ultrasound, or other stimulation or energy
Implementation Method 2
stimulation (e.g., electrical stimulation), ultrasound, or other stimulation or energy
Data Source
AI summary
An electrical stimulation device for modulating a blood-brain barrier (BBB) of a subject includes at least one electrode configured to delivery electrical stimulation to the subject to stimulate a sphenopalatine ganglion (SPG) of the subject, and a control unit in communication with the at least one electrode. The control unit generates a first electrical stimulation signal to the at least one electrode to apply a first electrical stimulation to the subject to stimulate a sphenopalatine ganglion (SPG) of the subject thereby increasing porosity of the BBB from an initial porosity to an increased porosity, and generate, after said first electrical stimulation signal, a second electrical stimulation signal to the at least one electrode to apply a second electrical stimulation to the subject to stimulate the SPG of the subject thereby decreasing porosity of the BBB from the increased porosity to a decreased porosity that is less than the increased porosity.