What question did this study set out to answer?

This research aims to differentiate between checkpoint inhibitor pneumonitis and radiation pneumonitis by profiling T cell characteristics.

June 11, 2026MedOpen Access

Single-cell profiling unveils an exhaustion trajectory of ZNF683hi tissue-resident alveolar CD8+ T cells in checkpoint inhibitor pneumonitis

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Randomized trial evaluates cellular differences in checkpoint inhibitor pneumonitis, guiding treatment decisions.

This research aims to differentiate between checkpoint inhibitor pneumonitis and radiation pneumonitis by profiling T cell characteristics.
Utilized single-cell RNA sequencing and single-cell T cell receptor sequencing.
Analyzed bronchoalveolar lavage fluid and peripheral blood from two cohorts: discovery (seven CIP, six RP, six controls) and validation (five ICI plus RT patients).
Identified cellular profiles linked to T cell exhaustion.
CIP shows a significant accumulation of exhausted alveolar CD8+ T cells, primarily differentiating from ZNF683hi T cells.
RP cells largely originate from GZMKhi CD8+ T cells.
Clinical decisions on ICI rechallenge were successfully guided by findings in both cohorts.

Zhou et al. (2026) studied this question.

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