Polyvalent Cation Composition for Drug Clearance Control
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Solution Overview
Problem
Existing technologies lack effective methods to control pharmacokinetics, particularly the metabolism and excretion of drugs by liver sinusoidal endothelial cells and kidneys, which affect drug concentration in blood and distribution to target organs.
Innovation Solution
The use of polyvalent cations, such as cationic polymers modified with polyethylene glycol, to localize on the inner vascular surfaces of liver sinusoidal endothelial cells and kidney vascular endothelial cells, reducing their ability to excrete drugs and increasing drug delivery to target organs like the spleen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If drugs are administered to achieve therapeutic effects, then drug concentration in blood is required, but drugs are rapidly cleared by liver sinusoidal endothelial cells and kidneys
Solution Approach 1:
The patent uses a cationic polymer as an intermediary substance that binds to the inner vascular surface of liver sinusoidal endothelial cells and kidney vascular endothelial cells. This polymer acts as a mediator that reduces the direct interaction between drugs and these clearance cells, thereby decreasing drug clearance while maintaining therapeutic drug concentrations in blood
Solution Approach 2:
The patent applies preliminary action by pre-treating the vascular surface with cationic polymer before drug administration. The polymer is administered first to coat the endothelial cell surfaces, creating a protective layer that prevents subsequent rapid drug clearance when the actual drug is administered
2Quantity of substance
If drugs are cleared rapidly by liver and kidneys, then drug concentration in blood decreases, but this limits drug delivery to target organs
Solution Approach 1:
The cationic polymer serves as an intermediary that modifies the vascular endothelium to reduce drug excretion. By binding to the inner vascular surface, it creates a barrier that prevents drugs from being rapidly taken up by clearance cells, thereby improving drug delivery to target organs while reducing unwanted excretion
3Stability of the object's composition
If conventional micelle formulations are used to stabilize nucleic acids, then stability in blood is improved, but clearance by liver sinusoidal endothelial cells remains problematic
Solution Approach 1:
The patent introduces a cationic polymer intermediary that binds to liver sinusoidal endothelial cells before micelle administration. This intermediary layer prevents the micelles from being rapidly cleared by these cells, thereby maintaining both the stability of nucleic acid formulations in blood and reducing clearance by liver cells
Solution Approach 2:
The cationic polymer is administered in advance to coat the endothelial cell surfaces, creating a protective environment before the nucleic acid-containing micelles are introduced. This preliminary action ensures that when the micelles are administered, they encounter a modified vascular surface that reduces clearance
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
Enhances drug retention in blood and improves the amount of drug delivered to target organs by reducing clearance from these cells, thereby controlling pharmacokinetics and enhancing drug distribution.
Implementation Method 1
polyvalent cations are localized on the inner vascular surface of the liver sinusoidal endothelial cells and the inner vascular surface of the vascular endothelium of the kidneys
Data Source
AI summary
The present invention provides a composition that controls pharmacokinetics. Specifically, the present invention provides: a composition for controlling pharmacokinetics, the composition containing a polyvalent cation as an active ingredient; and a method for controlling pharmacokinetics using the polyvalent cation.