High-throughput profiling of histone post-translational modifications and chromatin modifying proteins by reverse...

Area of Science:

• Epigenetics
• Molecular Biology
• Cancer Research

Background:

• Epigenetic variations, including histone post-translational modifications (PTMs), are critical in development and diseases like cancer.
• Understanding histone PTMs and their regulators is key for disease insights and developing epigenetic therapeutics.

Purpose of the Study:

• To adapt and validate a reverse phase protein array (RPPA) platform for comprehensive profiling of histone PTMs and epigenomic regulators.
• To establish a robust, high-throughput platform for analyzing epigenetic states.

Main Methods:

• Developed and validated an antibody-based RPPA platform for 20 histone PTMs and 40 histone-modifying proteins.
• Validated assay specificity using synthetic peptides and cellular responses to inhibitors.
• Applied the platform to stem cell differentiation and a mouse tumor model.

Main Results:

• Successfully profiled histone PTMs and modifier proteins using the validated RPPA platform.
• Demonstrated the platform's utility in stem cell induction and a mammary tumor progression model.
• Established a rapid, microscale histone isolation method and automated workflows for high-throughput analysis.

Conclusions:

• The developed RPPA platform offers a robust, high-throughput method for global epigenetic profiling.
• This platform facilitates the discovery and validation of epigenetic targets and biomarkers for translational applications.
• The technology supports comprehensive epigenetics analysis for biological research, disease studies, diagnostics, and therapy development.