Comprehensive Micro-SPE-Based Bottom-Up Proteomic Workflow for Sensitive Analysis of Limited Samples.

Area of Science:

• Proteomics
• Analytical Chemistry
• Biotechnology

Background:

• Limited biological samples (e.g., rare cells, biopsies) pose challenges for traditional proteomic analysis due to low protein quantities (pg-μg levels).
• Existing large-scale proteomic methods are often incompatible with minute sample amounts, hindering research on precious clinical and biological materials.

Purpose of the Study:

• To develop a sensitive sample preparation workflow for the proteomic analysis of scarce biological samples.
• To address the limitations of current methods in handling low-level protein amounts from limited sample sources.

Main Methods:

• Development and application of an on-microsolid-phase extraction tip (OmSET)-based sample preparation workflow.
• Testing the platform with 100-10,000 typical mammalian cells.

Main Results:

• The OmSET workflow demonstrated successful sensitive proteomic analysis for limited biological samples.
• The platform is scalable for analyzing lower and larger protein amounts and accommodating higher sample throughput.

Conclusions:

• The OmSET-based workflow provides a sensitive and scalable solution for proteomic analysis of scarce biological samples.
• This method advances the capability to study precious samples, including rare cells and small biopsies, in proteomics research.