Quantifying nuclear p65 as a parameter for NF-κB activation: Correlation between ImageStream cytometry, microscopy,...

Area of Science:

• Cellular biology
• Molecular oncology
• Cancer therapeutics

Background:

• The nuclear factor kappa B (NF-κB) pathway is crucial for cellular processes and a key therapeutic target in cancer.
• NF-κB activation involves the p65 component translocating to the nucleus.
• Conventional methods for assessing NF-κB translocation have limitations in statistical robustness and population heterogeneity analysis.

Purpose of the Study:

• To evaluate the ImageStream platform for quantifying NF-κB p65 nuclear translocation.
• To compare ImageStream analysis with conventional methods like microscopy and Western blotting.
• To assess the correlation between NF-κB translocation and cellular response to therapy.

Main Methods:

• Utilized the ImageStream platform, combining microscopy and flow cytometry.
• Assessed receptor-mediated (TNFα) and drug (Daunorubicin, DNR)-induced NF-κB translocation in leukemic cell lines.
• Quantitatively analyzed p65 translocation in defined immunophenotypic subpopulations.

Main Results:

• ImageStream assessment of NF-κB translocation correlated well with microscopy and Western blot analyses.
• ImageStream enabled reproducible, quantitative assessment of p65 translocation in specific cell subpopulations.
• DNR-induced NF-κB translocation quantitatively correlated with apoptosis, a biological response.

Conclusions:

• The ImageStream platform is a powerful tool for evaluating NF-κB/p65 activity.
• This method can determine response to therapies targeting aberrant NF-κB signaling.
• ImageStream facilitates quantitative assessment of NF-κB pathway activation in cancer research.