Nanotopology-Enabled On-Site Pathogen Detection for Managing Atopic Dermatitis

초록

Atopic dermatitis (AD), a prevalent skin condition often complicated by microbial infection, poses a significant challenge in identifying the responsible pathogen for its effective management. However, a reliable, safe tool for pinpointing the source of these infections remains elusive. In this study, a novel on-site pathogen detection that combines chemically functionalized nanotopology with genetic analysis is proposed to capture and analyze pathogens closely associated with severe atopic dermatitis. The chemically functionalized nanotopology features a 3D hierarchical nanopillar array (HNA) with a functional polymer coating, tailored to isolate target pathogens from infected skin. This innovative nanotopology demonstrates superior pathogenic capture efficiency, favorable entrapment patterns, and non-cytotoxicity. An HNA-assembled stick is utilized to directly retrieve bacteria from infected skin samples, followed by extraction-free quantitative loop-mediated isothermal amplification (direct qLAMP) for validation. To mimic human skin conditions, porcine skin is employed to successfully capture Staphylococcus aureus, a common bacterium exacerbating AD cases. The on-site detection method exhibits an impressive detection limit of 103 cells mL-1. The HNA-assembled stick represents a promising tool for on-site detection of bacteria associated with atopic dermatitis. This innovative approach enables to deepen the understanding of AD pathogenesis and open avenues for more effective management strategies for chronic skin conditions. An on-site pathogen detection is presented for severe atopic dermatitis (AD), combining chemically functionalized nanotopology and genetic analysis. The unique 3D hierarchical nanopillar array with a functional polymer coating efficiently isolates target pathogens from infected skin, facilitating extraction-free quantitative loop-mediated isothermal amplification. Micro pig skin models demonstrate successful Staphylococcus aureus detection with impressive detection limit, promising rapid on-site diagnosis for AD management. image

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