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• W4386985479 abstract "Multiplexed immunofluorescence (mIF) is an emerging assay for multichannel protein imaging that can decipher cell-level spatial features in tissues. However, existing automated cell phenotyping methods, such as clustering, face challenges in achieving consistency across experiments and often require subjective evaluation. As a result, mIF analyses often revert to marker gating based on manual thresholding of raw imaging data.To address the need for an evaluable semi-automated algorithm, we developed GammaGateR, an R package for interactive marker gating designed specifically for segmented cell-level data from mIF images. Based on a novel closed-form gamma mixture model, GammaGateR provides estimates of marker-positive cell proportions and soft clustering of marker-positive cells. The model incorporates user-specified constraints that provide a consistent but slide-specific model fit. We compared GammaGateR against the newest unsupervised approach for annotating mIF data, employing two colon datasets and one ovarian cancer dataset for the evaluation. We showed that GammaGateR produces highly similar results to a silver standard established through manual annotation. Furthermore, we demonstrated its effectiveness in identifying biological signals, achieved by mapping known spatial interactions between CD68 and MUC5AC cells in the colon and by accurately predicting survival in ovarian cancer patients using the phenotype probabilities as input for machine learning methods. GammaGateR is a highly efficient tool that can improve the replicability of marker gating results, while reducing the time of manual segmentation.The R package is available at https://github.com/JiangmeiRubyXiong/GammaGateR .Please address correspondence to jiangmei.xiong@vanderbilt.edu and simon.vandekar@vumc.org .GammaGateR is the first semi-automated marker gating tool for mIF image, and it will help to diminish the inconsistency with manual marker gating.With novel cfGMM, GammaGateR can fit flexibly across slides with different distributions and incorporate biology priors.GammaGateR is proven to reveal credible prognostic information, and it can quantify known findings in tumor cell populations." @default.
• W4386985479 created "2023-09-24" @default.
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• W4386985479 date "2023-09-23" @default.
• W4386985479 modified "2023-10-12" @default.
• W4386985479 title "GammaGateR: semi-automated marker gating for single-cell multiplexed imaging" @default.
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• W4386985479 doi "https://doi.org/10.1101/2023.09.20.558645" @default.
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