Scientists tested a hydrogel-coated microneedle patch designed to sample skin microbes and immune cells. This pilot study included human participants and mice models colonized with specific bacteria. The patches were well tolerated in humans with no reported adverse events. In mice, the device successfully preserved individual microbial signatures and tracked immune responses during different bacterial exposures. Researchers observed distinct immune patterns when mice were exposed to harmless bacteria, harmful pathogens, or both together. The study found that harmless bacteria can induce controlled immune activation that stabilizes over time, while harmful bacteria drive progressive inflammation. Additionally, harmless bacteria reshaped immune responses to harmful pathogens, leading to a temporary activation followed by reduced inflammation. This work establishes microneedle sampling as a strategy to study immune-microbiome dynamics in barrier tissues. It provides a framework for future mechanistic studies of host-microbe interactions in health and disease.
Preclinical study shows hydrogel microneedle patches sample microbes and immune cells in humans and miceHydrogel patches sample skin microbes and immune cells in humans and mice
AI-generated summary of the cited source, checked by automated accuracy review. How we work
This primary research article presents a preclinical study involving hydrogel-coated microneedle patches for co-sampling viable microbes, immune cells, and interstitial fluid in humans and murine models. The human pilot component assessed tolerability, finding that patches were well tolerated in humans. No adverse events, serious adverse events, discontinuations, or specific absolute numbers were reported for safety outcomes.
In murine models colonized with commensal Staphylococcus epidermidis and/or opportunistic pathogen Staphylococcus aureus, the study observed distinct immune trajectories during commensal colonization, pathogen challenge, and commensal-pathogen co-colonization. Pathogen colonization drives progressive inflammatory amplification, whereas commensal exposure induces controlled immune activation that stabilizes over time. Exposure to S. epidermidis reshapes pathogen-induced responses, producing a transient immune activation followed by attenuation of inflammation.
The authors note that inter-individual microbial signatures were preserved. The study establishes MN sampling as a strategy to resolve immune-microbiome dynamics in barrier tissues and provides a framework for mechanistic studies of host-microbe interactions in health and disease. Follow-up duration and specific effect sizes were not reported. Funding or conflicts of interest were not reported.
View Original Abstract ↓
Guselkumab Phase III trials validate 3VAS and 4VAS measures for psoriatic arthritis disease activity assessment
Study checks how well pain scores track joint damage in psoriatic arthritis patients
Related in Dermatology
From Other Specialties
