Microbiome-Responsive Hydrogels: From Biological Cues to Smart Biomaterials

Area of Science:

• Biomaterials Science
• Microbiology
• Drug Delivery

Background:

• Stimuli-responsive hydrogels (SRHs) lack biological specificity for complex tissue microenvironments.
• Microbe-colonized tissues present unique biochemical signals (pH gradients, metabolites, enzymes) linked to health and disease.
• Current hydrogel design underutilizes these endogenous microbial signals.

Purpose of the Study:

• To highlight microbiome-responsive hydrogels (MRHs) as a strategy to address the limitations of SRHs.
• To review engineering approaches, microbial stimuli, and applications of MRHs.
• To emphasize translational and regulatory challenges in the field of MRHs.

Main Methods:

• Literature review of current engineering approaches for MRHs.
• Identification and summary of key microbial stimuli utilized in MRH design.
• Analysis of emerging biomedical applications and translational challenges of MRHs.

Main Results:

• MRHs utilize microbial cues for tailored responses like swelling, degradation, and drug release.
• MRHs offer improved physiological relevance and specificity by targeting microbe-derived signals.
• This approach enables precision therapies for disease-associated microbial niches.

Conclusions:

• MRHs represent a promising but early-stage field requiring standardized triggers and design frameworks.
• Further research is needed to overcome fragmentation and establish robust evaluation strategies.
• MRHs are positioned as an underexplored platform for advanced smart biomaterials.