Biophoton Detection for Non-Invasive UV Sensitivity Assessment
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Solution Overview
Problem
Current methods for evaluating UV sensitivity and oxidative stress in human skin are invasive, limited in scope, or do not accurately reflect the skin's internal state, and lack detailed temporal analysis of biophoton response to UV irradiation.
Innovation Solution
A non-invasive method using biophoton detection within a specific time frame after UV irradiation to assess UV sensitivity, where the amount of biophotons is used as an index for evaluating erythema formation and identifying UV sensitivity-reducing agents, employing UV-A and UV-B radiation with a specific intensity and duration, and utilizing a xenon lamp as a light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If biopsy skin method is used to evaluate oxidative stress, then measurement precision is improved, but ease of operation deteriorates due to invasiveness
Solution Approach 1:
The patent uses biophoton emission as an intermediary indicator to indirectly measure oxidative stress without direct tissue sampling. Biophotons serve as a natural mediator that reflects the oxidation state of skin cells, allowing non-invasive assessment while maintaining measurement accuracy through correlation with internal oxidative processes.
2Ease of operation
If stratum corneum tape stripping is used to evaluate oxidized proteins, then ease of operation is improved, but measurement precision deteriorates as it only evaluates the stratum corneum and not the internal skin state
Solution Approach 1:
The biophoton detection method serves multiple functions simultaneously: it evaluates oxidative stress in the stratum corneum, reflects the internal skin state through deeper tissue signal penetration, and provides temporal dynamics of oxidative response. This multi-functional approach replaces the limited single-function of tape stripping.
3Ease of operation
If Raman spectroscopy is used for carotenoid measurement, then ease of operation is improved, but measurement precision deteriorates as it evaluates only a single antioxidant and not the whole skin response
Solution Approach 1:
Biophoton detection provides a universal measure of overall oxidative stress response involving multiple antioxidants and cellular processes simultaneously, rather than measuring individual antioxidants in isolation. The method captures the integrated functional response of the entire skin system to oxidative challenge.
4Measurement precision
If MED measurement is used to evaluate UV sensitivity, then measurement precision is improved, but loss of time increases due to the 24-hour waiting period for erythema formation
Solution Approach 1:
The patent performs preliminary detection of biophoton emission immediately after UV irradiation to predict future erythema development. By measuring the oxidative stress response in the initial moments after irradiation, the method provides early warning of UV sensitivity without requiring waiting 24 hours for visible erythema to develop.
Solution Approach 2:
The biophoton emission serves as real-time feedback about the skin's oxidative stress response to UV irradiation. This immediate feedback allows for rapid assessment of UV sensitivity and can guide preventive measures before irreversible damage occurs, eliminating the need for delayed MED measurement.
5Ease of operation
If existing biophoton detection methods are used, then non-invasive evaluation is achieved, but measurement precision deteriorates as they only measure integrated values immediately after UVA irradiation without detailed temporal analysis
Solution Approach 1:
The patent segments the biophoton detection process into multiple time points after UV irradiation (immediate, short-term, and long-term phases). By dividing the measurement into temporal segments, the method captures the dynamic evolution of oxidative stress response rather than providing a single integrated value, thereby improving measurement precision while maintaining non-invasive evaluation.
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
Enables immediate and non-invasive determination of UV sensitivity, allowing for effective preventive measures against erythema and the identification of UV sensitivity-reducing agents, with a significant correlation between biophoton intensity and erythema formation 24 hours post-irradiation.
Implementation Method 1
Biophotons are exceptionally weak spontaneous luminescence emitted by living organisms with life activities. As the origin, singlet oxygen and excited carbonyl compounds are inferred, and it is considered that the luminescence is caused by the oxidation reaction of living organisms.
Implementation Method 2
the luminescence is caused by the oxidation reaction of living organisms
Implementation Method 3
employing UV-A and UV-B radiation with a specific intensity and duration, and utilizing a xenon lamp as a light source
Implementation Method 4
reactive oxygen species (ROS) generated in the skin by light in the UV region (290 to 400 nm) and biological oxides generated by the reaction with the ROS have adverse effects on the skin as oxidative stress
Data Source
Figure 1~2
AI summary
The present invention provides a method for determining a sensitivity to ultraviolet light non-invasively and immediately. A method for determining a UV sensitivity is provided involving: a step of irradiating the skin of a test subject with ultraviolet light to determine the UV sensitivity using the amount of biophotons to be detected within a specific period after the irradiation, wherein 50% or more of the specific period overlaps a period from 1 to 3 minutes after the irradiation.