Microemulsion Delivery for Alcohol-Soluble Hormones
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Solution Overview
Problem
Conventional delivery systems for nonderivatized hormones face challenges such as extensive liver metabolism, poor absorption rates, and variable hormone release profiles, leading to ineffective bloodstream concentrations and liver stress, especially for hormones with low solubility in oil and water.
Innovation Solution
A modified oil-in-water microemulsion system that solubilizes alcohol-soluble species like DHEA and pregnenolone using a phospholipid, polyethylene glycol derivative, oil, and alcohol, with a sugar or sugar alcohol in the polar continuous phase, allowing for efficient oral delivery and stable hormone concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If nonderivatized hormones are delivered orally using conventional delivery systems, then the hormone can be administered easily, but extensive liver metabolism occurs resulting in negligible bloodstream concentration and liver stress
Solution Approach 1:
The patent uses alcohol as an intermediary solvent to dissolve nonderivatized hormones, creating alcohol-based delivery systems. This intermediary approach allows the hormone to bypass extensive liver metabolism that occurs with conventional oral delivery, while still being administered orally. The alcohol solvent facilitates direct absorption into the bloodstream, resolving the contradiction between ease of administration and effectiveness.
Solution Approach 2:
The patent changes the physical-chemical parameters of the delivery system by using alcohol-based solutions instead of conventional solid or water-based formulations. This parameter change (from solid/suspended form to liquid solution form with appropriate solubility characteristics) enables the hormone to avoid first-pass liver metabolism while maintaining ease of oral administration, thereby improving bloodstream concentration effectiveness.
2Ease of operation
If nonderivatized hormones are delivered orally in solid or suspended form, then administration is simple, but significant liver stress occurs as the majority of hormones are digested and not transferred to bloodstream
Solution Approach 1:
The patent introduces alcohol as an intermediary carrier that prevents direct contact between the nonderivatized hormone and liver metabolizing enzymes. By formulating the hormone in alcohol-based solutions with specific solubility characteristics, the system facilitates direct absorption through the gastrointestinal tract into the bloodstream, bypassing the harmful first-pass liver metabolism while maintaining simple oral administration.
Solution Approach 2:
The patent changes the formulation parameters from solid or suspended forms to liquid solution forms with controlled alcohol content and solubility characteristics. This parameter change enables the hormone to remain in solution form that facilitates direct absorption without requiring liver metabolic processing, thereby eliminating liver stress while keeping administration simple.
3Object-affected harmful factors
If transdermal creams and gels are used to bypass liver metabolism, then liver stress is reduced, but absorption rates are poor and variable with potential hormone alteration by skin enzymes
Solution Approach 1:
Instead of attempting to deliver the hormone through the skin barrier (transdermal route), the patent inverts the approach by using an oral liquid solution formulation that facilitates direct absorption into the bloodstream. This inversion bypasses both the liver first-pass metabolism problem and the transdermal absorption inconsistency problem, achieving reliable and consistent hormone delivery.
4Ease of operation
If solid pellets are implanted under the skin for continuous hormone delivery, then injection and daily application are avoided, but wide variance in release profile occurs due to implant depth, tissue location, and agitation
Solution Approach 1:
The patent inverts the delivery route from transdermal implantation back to oral administration, but with a critical modification: using liquid solution formulation with specific alcohol content and solubility characteristics that enables direct and consistent absorption into the bloodstream. This inversion eliminates the variability introduced by implant depth, tissue location, and physical agitation, while still avoiding the need for injection or daily application through the use of sustained-release liquid formulation.
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 microemulsion system achieves rapid and efficient delivery of nonderivatized hormones to the bloodstream, providing therapeutically effective concentrations and reducing liver stress, enabling a pulsed dosing regimen that mimics natural hormone release, thereby improving bioavailability and minimizing side effects.
Implementation Method 1
the alcohol-soluble species is solubilized in the modified oil phase, the modified oil phase comprising a phospholipid, a polyethylene glycol derivative, an oil, and an alcohol
Implementation Method 2
A modified oil-in-water microemulsion system that solubilizes alcohol-soluble species like DHEA and pregnenolone
Implementation Method 3
The microemulsion system achieves rapid and efficient delivery of nonderivatized hormones to the bloodstream, providing therapeutically effective concentrations
Data Source
AI summary
Microemulsions are described where hydrophobic liquid droplets are distributed in a continuous hydrophilic liquid phase. The described microemulsions may be thought of as modified oil-in-water (MOIW) microemulsions, where both the “oil” and “water” phases of the microemulsion are modified. The oil phase droplets of the MOIW microemulsion are modified with alcohol and can solubilize alcohol-soluble species, including nonderivatized hormones. The polar continuous “water” phase of the MOIW microemulsion is modified with a sugar or sugar alcohol.