Engineered Skin Bacteria Secreting UV-Absorbing MAAs

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Solution Overview

Problem

Current sunscreens are ineffective due to improper application, environmental concerns, and potential health risks, necessitating a safer and more efficient method for UV protection.

Innovation Solution

Genetically engineered commensal bacteria, such as Staphylococcus epidermidis and Escherichia coli Nissle 1917, produce mycosporine-like amino acids (MAAs) that act as natural sunscreens, providing continuous UV protection by acting as 'living factories' on the skin surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If synthetic sunscreen components are used, then UV protection is provided, but environmental harm and health risks occur

Engineering Contradiction:

ImproveUV protection effectivenessVSAvoidenvironmental harm and health risks

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes the skin's existing microbiome as self-service biological factories that naturally produce UV-protective MAAs. The commensal bacteria already residing on skin are genetically modified to synthesize mycosporine-like amino acids, eliminating the need for external sunscreen applications and reducing environmental harm while maintaining reliable UV protection through the body's own microbial community

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces genetically modified commensal bacteria as intermediary organisms that mediate between UV radiation and human skin. These bacteria serve as living shields that absorb and dissipate UV energy through MAA production, protecting the host from direct UV damage while being biodegradable and environmentally benign compared to synthetic chemicals

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If traditional sunscreen is applied, then UV protection is achieved, but frequent reapplication is required

Engineering Contradiction:

ImproveUV protectionVSAvoidfrequency of reapplication

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The genetically modified commensal bacteria on skin perform self-service by continuously synthesizing UV-protective MAAs without external intervention. The bacteria's natural replication and metabolic processes ensure sustained MAA production, eliminating the need for frequent manual reapplication of sunscreen products while maintaining consistent protection

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent establishes continuous useful action through the ongoing metabolic activity of commensal bacteria that constantly produce MAAs. Unlike discrete sunscreen applications that wear off, the living bacteria provide uninterrupted UV protection through their continuous biosynthetic processes, as long as they remain on the skin surface

Inventive Principle:

Principle #20Continuity of useful action

3Duration of action of stationary object

If genetically modified bacteria are used, then continuous UV protection is provided, but bacterial safety and control must be ensured

Engineering Contradiction:

Improveduration of UV protectionVSAvoidbacterial safety and control

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The patent extracts only the essential UV-protection function from complex sunscreen formulations by using genetically modified bacteria to produce specific MAAs. This extraction approach simplifies the system to living cells that naturally contain and regulate their protective compounds, reducing concerns about uncontrolled chemical interactions while maintaining prolonged protection

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The commensal bacteria provide self-service through their innate biological regulatory mechanisms that control their own growth, metabolism, and MAA production. This self-regulation reduces the need for external control systems and enhances safety, as the bacteria naturally respond to environmental conditions and maintain homeostasis on the skin surface

Inventive Principle:

Principle #25Self-service

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 engineered bacteria effectively reduce UV-induced DNA damage and offer prolonged protection comparable to or better than traditional sunscreens, without the need for frequent reapplication and with minimal environmental impact.

Implementation Method 1

engineered commensal bacteria which, when applied to the skin surface, act as living biofactories of sunscreen molecules. These engineered bacteria produce mycosporine-like amino acids (MAAs) which are natural photoprotective molecules

Methodology Applied

Scientific EffectUV absorption: Absorption (EM radiation)

Data Source

PatentUS12545936B2Expression and secretion of UV absorbent material from transformed bacteria

Publication Date: 2026.02.10 UNIVERSITY OF CINCINNATI

AI summary

A genetically modified strain of commensal bacteria Staphylococcus epidermidis is provided which produces a material with UV absorbing properties. The material with UV absorbing properties may be a mycosporine-like amino acid such as shinorine.