Mesoporous silica chip: enabled peptide profiling as an effective platform for controlling bio-sample quality and...

Area of Science:

• Biochemistry
• Analytical Chemistry
• Clinical Diagnostics

Background:

• High-quality clinical samples are essential for accurate data interpretation in medicine.
• Optimized pre-analysis sample handling is critical to prevent biased results.
• A universal method to evaluate sample quality and handling is needed.

Purpose of the Study:

• To develop a novel platform for evaluating bio-sample quality using peptide profiles.
• To assess the impact of pre-analysis handling on sample integrity.
• To establish a reliable method for clinical settings.

Main Methods:

• Utilized a mesoporous silica chip-based sample preparation technique.
• Employed matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) for peptide fingerprint analysis.
• Analyzed low molecular weight (LMW) peptides in rat serum samples.

Main Results:

• The method is rapid (<40 min), requires minimal sample volume (<10 µL), and offers high sensitivity (LOD 10 ng/mL) and reproducibility (CV% <15%).
• Bioinformatics tools differentiated serum samples processed under various conditions (temperature, time, freeze-thaw).
• A standard for evaluating biological sample preservation was established based on LMW peptide spectral changes.

Conclusions:

• The novel method effectively identifies sample composition variations.
• It provides a cost-effective tool for sample manipulation in clinical settings.
• The approach aids in ensuring the integrity of clinical samples for research and diagnostics.