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Single-cell transcriptomics reveals pre-existing COVID-19 vulnerability factors in lung cancer patients.
Molecular Cancer Research : MCR 2023 December 9
COVID-19 and cancer are major health threats, and individuals may develop both simultaneously. Recent studies have indicated that cancer patients are particularly vulnerable to COVID-19, but the molecular mechanisms underlying the associations remain poorly understood. To address this knowledge gap, we collected single-cell RNA sequencing data from COVID-19, lung adenocarcinoma, small cell lung carcinoma patients and normal lungs to perform an integrated analysis. We characterized altered cell populations, gene expression, and dysregulated intercellular communication in diseases. Our analysis identified pathological conditions shared by COVID-19 and lung cancer, including upregulated TMPRSS2 expression in epithelial cells, stronger inflammatory responses mediated by macrophages, increased T cell response suppression, and elevated fibrosis risk by pathological fibroblasts. These pre-existing conditions in lung cancer patients may lead to more severe inflammation, fibrosis, and weakened adaptive immune response upon COVID-19 infection. Our findings revealed potential molecular mechanisms driving an increased COVID-19 risk in lung cancer patients and suggested preventive and therapeutic targets for COVID-19 in this population. Implications: Our work reveals the potential molecular mechanisms contributing to the vulnerability to COVID-19 in lung cancer patients.
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