In Vitro Skin Model for Evaluating UV Protection in Young Children
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Solution Overview
Problem
There is a lack of effective methods for evaluating the effectiveness of sunscreen products on the skin of children aged three years or less, as their skin responds uniquely to UV exposure, and current testing procedures are not adapted for this age group, hindering the development of safe and effective cosmetic or therapeutic products.
Innovation Solution
A method involving a skin model specifically replicating the characteristics of children's skin aged three years or less, using biological markers affected by UV exposure, to assess the effectiveness of formulations or active ingredients in preventing UV-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adult skin testing methods are used for children's skin, then testing procedures are simplified and can be applied generally, but the evaluation results do not accurately reflect the unique sensitivity and response of children's skin to UV radiation
Solution Approach 1:
The patent applies local quality by developing a specialized in vitro testing method specifically adapted for children's skin characteristics. The method uses child-derived keratinocytes and selects biological markers that are specifically relevant to children's UV response, rather than using a universal testing protocol. This localized adaptation ensures the evaluation accurately reflects children's unique skin sensitivity while maintaining scientific rigor.
2Measurement precision
If in vitro testing methods specific to children's skin are developed, then the accuracy of evaluating UV protection effectiveness is improved, but the complexity of the testing procedure increases
Solution Approach 1:
The patent segments the testing procedure into distinct, manageable components: (1) obtaining or culturing child-derived keratinocytes, (2) applying the formulation to be tested, (3) exposing to controlled UV radiation, (4) measuring specific biological markers, and (5) comparing results to control groups. This segmentation makes the complex specialized testing protocol more systematic and implementable while maintaining high accuracy in evaluating UV protection for children's skin.
3Reliability
If children's skin is exposed to UV radiation for beneficial vitamin D synthesis, then health benefits are achieved, but the risk of sunburn and long-term skin damage increases
Solution Approach 1:
The patent uses an in vitro testing system as an intermediary between UV radiation exposure and children's skin. By testing formulations on child-derived keratinocytes in controlled laboratory conditions, the method identifies products that can mediate protection against harmful UV effects while allowing beneficial exposure. This intermediary testing approach enables selection of sun protection formulations that reduce damage risk without completely blocking beneficial UV effects.
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 allows for the precise identification of formulations or active ingredients that effectively prevent UV-induced deleterious effects on young children's skin, providing a tailored solution for their unique skin sensitivity.
Implementation Method 1
high intensities of UV radiation damage the cells in the surface layer of the skin
Implementation Method 2
the level of expression of certain markers increases or decreases in the skin of children aged three years or less very significantly in comparison with the skin of younger children
Data Source
Figure 1A~1D
Figure 2~3
Figure 4~5
AI summary
The invention relates to in vitro methods for testing formulations or active ingredients for preventing the harmful effects of UV on children's skin, in particular children aged three or less. The inventors have developed methods for evaluating the in vitro efficacy of formulations in preventing the harmful effects of UV on the skin of children aged three or less, using a skin model specifically capable of reproducing the characteristics of the skin of children of this age.