Palmitate-Modified Peptide Delivery via Microneedle Patches
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Solution Overview
Problem
Decapeptide-12, a peptide used to treat hyperpigmentation, faces limited transcutaneous penetration due to its hydrophilicity and large molecular weight, limiting its effectiveness in reducing melanin content.
Innovation Solution
Modification of decapeptide-12 by adding a palmitate chain and its delivery using microneedle patches or chemical penetration enhancers like propylene glycol, oleic acid, camphor, and menthol to enhance skin permeation and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decapeptide-12 is used to treat hyperpigmentation, then melanin reduction efficacy is improved, but transcutaneous penetration is limited due to hydrophilicity and large molecular weight
Solution Approach 1:
The patent modifies the peptide structure by adding a palmitate chain to decapeptide-12, changing its physicochemical parameters (increasing lipophilicity and molecular weight) to improve transcutaneous penetration while maintaining melanin reduction efficacy
Solution Approach 2:
The patent employs chemical penetration enhancers (such as oleic acid, propylene glycol) and microneedle patches as intermediaries to facilitate the delivery of the peptide through the skin barrier, enabling effective transcutaneous penetration without compromising the peptide's therapeutic function
2Ease of operation
If a palmitate chain is added to decapeptide-12 to improve penetration, then transcutaneous permeation is enhanced, but molecular weight increases
Solution Approach 1:
The palmitate chain modification strategically alters the peptide's physicochemical parameters, specifically increasing lipophilicity to overcome the skin barrier while accepting the necessary increase in molecular weight as a trade-off for improved permeation
3Ease of operation
If chemical penetration enhancers are used to deliver peptides through skin, then skin permeation is enhanced, but formulation complexity increases
Solution Approach 1:
The patent uses chemical penetration enhancers as intermediary substances that temporarily interact with the skin barrier and peptide formulation to facilitate delivery, then are eliminated or remain in trace amounts, thus enhancing permeation without permanently complicating the final formulation structure
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 modified peptide, palm-peptide, shows significantly improved skin permeation and retention, with microneedle patches being the most effective delivery method, achieving over 50% melanin reduction in hyperpigmentation treatment.
Implementation Method 1
Enhanced human skin permeation was found using an in vitro skin permeation model
Implementation Method 2
decapeptide-12 was modified by adding a palmitate chain in an attempt to overcome this limitation
Implementation Method 3
We also tested the effects of chemical penetration enhancers and microneedles to deliver two peptides through skin
Data Source
AI summary
Hyperpigmentation is a common skin condition with serious psychosocial consequences. Decapeptide-12, a newly synthesized peptide, has been found to be safer than hydroquinone in reducing content of melanin, with efficacy up to more than 50 percent upon 16 weeks of twice daily treatment. However, the peptide suffers from limited transcutaneous penetration due to its hydrophilicity and large molecular weight. Therefore, decapeptide-12 was modified by adding a palmitate chain in an attempt to overcome this limitation. We also tested the effects of chemical penetration enhancers and microneedles to deliver two peptides through skin. Enhanced human skin permeation was found using an in vitro skin permeation model. Moreover, we examined peptide retention of different formulations. Our data showed that palm-peptides in microneedle patch was the most effective.