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Programmable 3DP microfluidic bio-reaction system: automated LAMP-on-a-chip.

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Engineers developed programmable microfluidic bio-reaction reservoirs using 3D printing. These novel hydrophobic valves enable precise fluid control for point-of-care diagnostics, including Mpox virus detection.

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Point-of-Care Diagnostics

Background:

  • Microfluidic systems are crucial for advancing point-of-care (PoC) devices.
  • Programmable bio-reaction reservoirs are needed for miniaturized and automated biological processes.

Purpose of the Study:

  • To engineer and characterize novel 3D hydrophobic valves for programmable bio-reaction reservoirs.
  • To demonstrate the utility of these reservoirs in PoC applications, including pathogen detection.

Main Methods:

  • Utilized 3D-printed soft lithography to fabricate hydrophobic valves and bio-reaction reservoirs.
  • Investigated the impact of channel dimensions and surface properties on reservoir burst pressures.
  • Developed a portable pressure pump for precise fluid control in microfluidic systems.

Main Results:

  • Characterized bio-reaction reservoirs with burst pressures ranging from 6.4 to 44.8 mbar.
  • Demonstrated programmable flow control in series and parallel configurations using various fluid samples (water, blood, serum).
  • Successfully integrated reservoirs into a microfluidic chip for loop-mediated isothermal amplification (LAMP) detection of Mpox virus, achieving visible colorimetric results.

Conclusions:

  • 3D-printed hydrophobic valves offer a versatile platform for creating programmable bio-reaction reservoirs for PoC devices.
  • The developed system enables automated fluid handling and efficient pathogen detection.
  • This technology holds significant potential for miniaturizing and automating complex biological assays in resource-limited settings.