Efficient sample preparation from complex biological samples using a sliding lid for immobilized droplet extractions.

Area of Science:

• Biotechnology
• Biochemistry
• Analytical Chemistry

Background:

• Sample preparation is a critical bottleneck in biological assays.
• Paramagnetic particles (PMPs) are widely used for analyte isolation due to efficient sampling and magnetic collection.
• Existing PMP methods involve fluid removal, PMP removal, or substrate removal, with the latter being less explored.

Purpose of the Study:

• To introduce and evaluate the Sliding Lid for Immobilized Droplet Extractions (SLIDE) platform for PMP-based sample preparation.
• To demonstrate SLIDE's effectiveness in simplifying and accelerating biological sample isolation and preparation.
• To showcase SLIDE's capability for performing complex protocols like cell staining.

Main Methods:

• Developed the SLIDE platform utilizing surface tension and patterned hydrophobicity.
• Applied SLIDE for isolation of various biological analytes including cells, DNA, RNA, and proteins.
• Utilized SLIDE for cell staining protocols by leveraging droplet recirculation and a simple lid mechanism.

Main Results:

• SLIDE enables rapid sample preparation with significantly low carryover (0.6%).
• The platform eliminates the need for time-intensive wash steps or immiscible fluids.
• Multistep cell staining protocols can be performed efficiently within SLIDE due to natural droplet recirculation.

Conclusions:

• SLIDE offers a simple, user-friendly platform for PMP-based sample preparation.
• The technology effectively isolates and prepares a range of complex biological samples.
• SLIDE represents a promising advancement in streamlining biological sample processing.