Intracellular HSP72 detection in HL60 cells using a flow cytometry system based on microfluidic analysis

Area of Science:

• Biotechnology
• Cell Biology
• Biomedical Engineering

Background:

• Heat-shock protein 72 (HSP72) is a crucial biomarker for cellular stress and disease states.
• Accurate detection of intracellular HSP72 is vital for numerous research applications.
• Existing methods for HSP72 detection can be complex or time-consuming.

Purpose of the Study:

• To develop and validate a novel assay for monitoring intracellular HSP72 expression.
• To utilize microfluidic Lab-on-a-chip technology for efficient cellular analysis.
• To provide a simple and effective tool for researchers studying cellular stress responses.

Main Methods:

• Development of a microfluidic assay for intracellular HSP72 detection.
• Utilized antibody staining combined with DNA counterstaining for HSP72 visualization.
• Employed cell permeabilization to facilitate antibody entry for intracellular staining.
• Performed heat-shock treatment (44°C for 30 min) to induce HSP72 expression.

Main Results:

• Successfully demonstrated intracellular HSP72 expression following heat shock.
• Quantified HSP72 levels at various post-incubation time points.
• Validated the microfluidic assay's performance against conventional flow cytometry and ELISA.
• Confirmed the simplicity and efficiency of the Lab-on-a-chip approach for flow cytometric assays.

Conclusions:

• The developed microfluidic Lab-on-a-chip assay provides a simple, efficient, and reliable method for detecting intracellular HSP72.
• This technology offers a valuable tool for researchers investigating cellular stress and disease.
• The assay's performance is comparable to established methods, highlighting its potential for broader adoption.