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Updated: Aug 2, 2025
Imaging CD4 T Cell Interstitial Migration in the Inflamed Dermis
Published on: March 25, 2016
Immune Profiling of Dermatologic Adverse Events from Checkpoint Blockade using Tissue Cyclic Immunofluorescence
Insights
Whole-slide cyclic immunofluorescence (CyCIF) offers superior immune cell characterization in immune checkpoint inhibitor (ICI)-induced skin reactions compared to standard methods. This advanced imaging technique reveals detailed spatial patterns, enhancing our understanding of dermatologic adverse events (dAEs).
Area of Science:
- Immunology
- Oncology
- Dermatology
Background:
- Immune checkpoint inhibitors (ICIs) can cause various dermatologic adverse events (dAEs).
- Accurate characterization of immune cell infiltrates is crucial for understanding dAE pathogenesis.
- Standard immunohistochemistry (IHC) offers limited single-cell resolution for complex immune infiltrates.
Approach:
- This study utilized whole-slide tissue-based cyclic immunofluorescence (CyCIF) imaging.
- Six cases of ICI-induced dAEs (lichenoid, bullous pemphigoid, psoriasis, eczematous) were analyzed.
- CyCIF results were compared with standard IHC for immune profiling.
Key Points:
- CyCIF provides significantly more detailed and precise single-cell characterization of immune infiltrates than IHC.
- CyCIF reveals tissue-level spatial patterns of immune cells, crucial for understanding dAE mechanisms.
- The technique is effective even on challenging, friable tissues like bullous pemphigoid.
Conclusions:
- CyCIF is a powerful tool for advancing the understanding of immune environments in dAEs.
- This method enables deeper exploration of disease mechanisms by precise phenotypic distinctions.
- Highly multiplexed tissue imaging, like CyCIF, shows promise for phenotyping immune-mediated diseases.
Abstract:
In this study, we demonstrate the utility of whole-slide CyCIF (tissue-based cyclic immunofluorescence) imaging for characterizing immune cell infiltrates in immune checkpoint inhibitor (ICI)-induced dermatologic adverse events (dAEs). We analyzed six cases of ICI-induced dAEs, including lichenoid, bullous pemphigoid, psoriasis, and eczematous eruptions, comparing immune profiling results obtained using both standard immunohistochemistry (IHC) and CyCIF. Our findings indicate that CyCIF provides more detailed and precise single-cell characterization of immune cell infiltrates than IHC, which relies on semi-quantitative scoring by pathologists. This pilot study highlights the potential of CyCIF to advance our understanding of the immune environment in dAEs by revealing tissue-level spatial patterns of immune cell infiltrates, allowing for more precise phenotypic distinctions and deeper exploration of disease mechanisms. By demonstrating that CyCIF can be performed on friable tissues, such as bullous pemphigoid, we provide a foundation for future studies to examine the drivers of specific dAEs using larger cohorts of phenotyped toxicity and suggest a broader role for highly multiplexed tissue imaging in phenotyping the immune mediated disease that they resemble.
