Multiplexed histology analyses for the phenotypic and spatial characterization of human innate lymphoid cells.
2021
Innate lymphoid cells (ILCs) emerge in the last few years as important regulators of immune responses and biological processes. Although ILCs are mainly known as tissue-resident cells, their precise localization and interactions with the microenvironment are still unclear. Here we combine a multiplexed immunofluorescence technique and a customized computational, open-source analysis pipeline to unambiguously identify CD127+ ILCs in situ and characterize these cells and their microenvironments. Moreover, we reveal the transcription factor IRF4 as a marker for tonsillar ILC3, and identify conserved stromal landmarks characteristic for ILC localization. We also show that CD127+ ILCs share tissue niches with plasma cells in the tonsil. Our works thus provide a platform for multiparametric histological analysis of ILCs to improve our understanding of ILC biology. Innate lymphoid cells (ILCs) are important regulators of biological processes. Here the authors combine multiplexed imaging and computational pipelines to reveal tonsillar IRF4+ ILC3s, and to identify conserved stromal landmarks for ILC localization, thereby providing a platform for future ILC studies.
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