Iron(III) Oxide Hydroxide Adsorbent Stabilized by Carbohydrates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current phosphate adsorbents have limited phosphate binding capacity and stability issues, leading to high doses and low patient compliance in treating hyperphosphatemia, with concerns about iron release and bioavailability.
Innovation Solution
A new iron(III)-based phosphate adsorbent comprising polynuclear iron(III) oxide hydroxides stabilized by insoluble and soluble carbohydrates, such as starch and sucrose, with a manufacturing process that maintains high phosphate binding capacity and stability, reducing iron release and improving bioavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If iron-containing phosphate adsorbents are used to treat hyperphosphatemia, then phosphate binding capacity is improved, but iron release occurs which may be toxic to body organs
Solution Approach 1:
The patent uses a composite material consisting of iron(III) oxide-hydroxide nanoparticles combined with starch and/or humic acid. This composite structure allows the iron component to bind phosphate effectively while the starch/humic acid matrix controls iron release, preventing toxicity. The composite nature enables simultaneous achievement of high phosphate binding capacity and reduced iron release.
Solution Approach 2:
Starch and humic acid act as intermediary substances that mediate between the iron(III) oxide-hydroxide and the biological environment. These intermediaries stabilize the iron nanoparticles, prevent excessive iron release into the body, while still allowing the iron component to perform its phosphate binding function. The intermediary substances create a controlled interface that resolves the contradiction between efficacy and safety.
2Quantity of substance
If high doses of phosphate adsorbent are administered to achieve sufficient phosphate binding, then phosphate control is improved, but patient compliance deteriorates due to high number of doses
Solution Approach 1:
The patent changes the key parameter of phosphate binding capacity by using iron(III) oxide-hydroxide nanoparticles with high surface area to volume ratio. This nanoparticle form provides dramatically increased phosphate binding capacity per unit mass, allowing much lower doses to achieve the same therapeutic effect. The parameter change from conventional iron compounds to nanoparticulate form enables reduced dosing frequency and improved patient compliance.
3Ease of manufacture
If conventional phosphate adsorbents are used, then manufacturing is simpler, but phosphate binding capacity is limited
Solution Approach 1:
The patent applies preliminary action by pre-coating iron(III) oxide-hydroxide nanoparticles with starch and/or humic acid during the manufacturing process. This preliminary coating step stabilizes the nanoparticles and enhances their phosphate binding capacity before administration. By performing this stabilization and capacity-enhancement step during manufacturing rather than requiring post-processing or high dosing, the patent achieves high phosphate binding capacity while maintaining manufacturing feasibility.
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
The new adsorbent achieves a higher phosphate binding capacity, enhancing patient compliance by reducing the number of doses required and minimizing iron release, thus addressing the limitations of existing adsorbents.
Implementation Method 1
The phosphate binding capacity of metal oxide hydroxides is known in the art... iron oxy-hydroxides which bind to ingested phosphate... polynuclear iron(III) oxide hydroxides... having the capacity to bind phosphorous
Implementation Method 2
polynuclear iron(III) oxide hydroxides stabilized by insoluble and soluble carbohydrates, such as starch and sucrose... stabilized by carbohydrates and/or humic acid
Data Source
AI summary
The present invention relates to a new iron containing phosphate adsorbent and its use e.g. for treating hyperphosphataemia.