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Updated: May 7, 2026

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing
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Published on: June 1, 2012

Early circulating biomarker detection using a wearable microprojection array skin patch.

Jacob W Coffey1, Simon R Corrie, Mark A F Kendall

  • 1Delivery of Drugs and Genes Group (D2G2), Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia.

Biomaterials
|September 19, 2013
PubMed
Summary
This summary is machine-generated.

Microprojection array (MPA) skin patches enhance biomarker capture by optimizing skin penetration depth and contact time. This allows for early detection of biomarkers, comparable to traditional blood tests, without invasive procedures.

Keywords:
BiomarkerDiagnosisMicroneedleMicroprojection arraySelective captureSurface chemistry

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Area of Science:

  • Biomaterials Science
  • Immunology
  • Dermatology

Background:

  • Microprojection array (MPA) skin patches offer a non-invasive method for capturing circulating biomarkers directly from the skin.
  • Optimizing MPA performance is crucial for sensitive and reliable biomarker detection in various diagnostic applications.

Purpose of the Study:

  • To investigate how optimizing MPA penetration depth and skin contact time improves in vivo biomarker capture.
  • To evaluate the MPA's ability to detect a model biomarker (antigen-specific IgG) post-vaccination in a murine model.

Main Methods:

  • MPA skin patches were applied to murine models with varying penetration depths (27–153 μm) and contact times (10 min to 24 h).
  • Biomarker capture was quantified by measuring antigen-specific IgG levels in response to a model vaccine (Fluvax).
  • MPA detection sensitivity was compared against standard enzyme-linked immunosorbent assay (ELISA) methods.

Main Results:

  • Increasing MPA penetration depth from epidermal to deep dermal layers resulted in a 4-fold increase in biomarker capture.
  • Biomarker detection was achieved after 10 minutes of MPA application, with capture increasing over 6-fold up to 6 hours.
  • Combined optimization of penetration depth and contact time enabled early biomarker detection comparable to ELISA.

Conclusions:

  • Optimized MPA design and application parameters significantly enhance in vivo biomarker capture from the skin.
  • MPA technology shows potential for rapid, non-invasive diagnostic tests, especially in resource-limited settings.
  • This approach could revolutionize point-of-care diagnostics by simplifying sample collection and processing.