Related Experiment Video
Updated: Jan 8, 2026
08:51
Human Egg Maturity Assessment and Its Clinical Application
Published on: August 19, 2019
20.1K
A mechanical buoyant microsphere immunoassay platform for single-embryo culture medium analysis
Meng-Shiue Lee1, Yu-Kai Lin2, Ya-Jou Lan2
1Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan; Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
Talanta
|December 19, 2025
Summary
This study introduces a novel buoyant microsphere immunoassay for analyzing tiny biological samples. The platform offers rapid, sensitive detection of biomarkers in low-volume fluids, ideal for embryo research.
Area of Science:
- Biomedical Engineering
- Analytical Chemistry
- Reproductive Biology
Background:
- Conventional immunoassays like ELISA require large sample volumes and long assay times.
- These limitations make them unsuitable for analyzing precious, low-volume biological fluids such as single-embryo culture medium (ECM).
Purpose of the Study:
- To develop a novel immunoassay platform for reliable analysis of microliter-scale samples.
- To enable sensitive and rapid detection of biomarkers in low-volume biological fluids.
Main Methods:
- Utilized buoyant hollow glass microspheres (40-60 μm) as reaction carriers.
- Employed a droplet-based design on a hydrophobic surface with hydrophilic traps, requiring only 2 μL of sample per assay.
- Integrated a custom quantification chip and a wind-assisted mixing module to enhance speed and reproducibility.
Main Results:
- Achieved high reproducibility (CV < 10%) and enhanced fluorescence signals.
- Demonstrated a limit of detection (LOD) below 0.4 pg/mL for human IL-1β.
- Reduced total assay time to approximately 18 minutes.
- Validated the platform using single-embryo ECM from a mouse model.
Conclusions:
- The buoyant microsphere immunoassay platform is rapid, sensitive, and automation-ready for low-volume samples.
- This technology shows strong potential for non-invasive embryo assessment and other biomedical applications.
- Facilitates biomarker studies relevant to embryo development and reproductive outcomes.
