Hyperosmotic Fluid Delivery for CNS Biologic Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods face challenges in achieving broad and effective distribution of large particle biologic agents, such as polynucleotides and AAV vectors, across the blood-brain barrier and into the central nervous system, limiting their therapeutic efficacy for diseases like neurodegenerative disorders due to size constraints and transport barriers.
Innovation Solution
A method involving the injection of therapeutic agents into cerebrospinal fluid regions, establishing fluid communication between CSF regions, and infusing a hyperosmotic fluid systemically to enhance convective transport across the blood-brain barrier, utilizing a system with isotonic or hypotonic fluids in a reservoir and hyperosmotic fluids for osmotic pressure manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biologic agents (polynucleotides, AAV vectors, cells) are used as therapeutic agents, then therapeutic efficacy for targeting disease cause is improved, but distribution across blood-brain barrier and into CNS is reduced due to large particle size
Solution Approach 1:
The patent uses the cerebrospinal fluid (CSF) as an intermediary medium to deliver biologic agents into the CNS. By injecting agents into the CSF space (ventricular or subarachnoid), the system bypasses the blood-brain barrier obstacle and utilizes the natural CSF circulation pathways to distribute large particle agents throughout the CNS parenchyma.
Solution Approach 2:
The patent applies hydraulic principles by establishing fluid communication between a reservoir and the CSF space, using pressure gradients to drive the flow of CSF and suspended biologic agents into the CNS. The system utilizes osmotic pressure manipulation and convective flow to enhance the penetration and distribution of large particle agents beyond what diffusion alone could achieve.
2Ease of operation
If biologic agents are injected directly into CSF, then delivery to CNS is improved, but distribution breadth is limited by diffusion constraints of large particles
Solution Approach 1:
The patent establishes a reservoir system that maintains continuous or periodic refilling of CSF with biologic agents. This preliminary establishment of fluid communication and pressure gradients creates sustained convective flow conditions that continuously push agents through the CNS, rather than relying on a single injection event that would only achieve localized diffusion.
Solution Approach 2:
The system maintains continuous action by keeping the reservoir in fluid communication with the CSF space, ensuring ongoing delivery of biologic agents. This continuous supply, combined with sustained osmotic pressure gradients and convective flow, allows large particle agents to progressively distribute throughout the entire CNS volume over time, rather than being confined to a localized injection site.
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
This approach enables broader distribution of biologic agents within the CNS, overcoming size limitations and transport barriers, potentially leading to more effective treatment of diffuse CNS diseases by leveraging convection and osmotic pressure to facilitate agent delivery.
Implementation Method 1
infusing a hyperosmotic fluid systemically
Implementation Method 2
enhance convective transport across the blood-brain barrier
Implementation Method 3
The fluid can have a hydraulic pressure at or above an intracranial pressure
Data Source
AI summary
Aspects herein relate to systems and methods for delivery of biologic agents to the central nervous system. In various embodiments, a method of administering a therapeutic agent to the central nervous system (CNS) is included. The method can include injecting a therapeutic agent into a first cerebrospinal fluid (CSF) region of the subject. The method can further include establishing fluid communication between a fluid reservoir and a second cerebrospinal fluid (CSF) region of a subject, the fluid having a hydraulic pressure at or above an intracranial pressure. The method can further include infusing a hyperosmotic fluid systemically. Other embodiments, including kits and systems are also included herein.