Objective:

To directly quantify boron levels in individual live cancer cells using single-cell inductively coupled plasma mass spectrometry (sc-ICP-MS).

Approach:

• Methodology: Utilized sc-ICP-MS to measure boron in single living cells in real time, allowing tracking of cellular uptake and retention of boronophenylalanine (BPA) and sodium borocaptate (BSH).
• Optimization: Optimized cell culture medium and injection method to preserve cell viability during analysis.

Key Findings:

• First direct measurement of boron in individual tumor cells.
• BPA uptake occurred rapidly via amino acid transporters, while BSH entered more slowly and inconsistently.
• Boron levels decayed at different rates across individual cells.
• Revealed variability in boron accumulation critical for understanding treatment efficacy.

Interpretation:

Limitations:

• Study focused on only two clinical boron agents (BPA and BSH).
• Further research needed to explore transporter mechanisms and optimize drug design.

Conclusion:

Sources:

• Journal of Analytical Atomic Spectrometry