Single-cell characterization of subsolid and solid lesions in the lung adenocarcinoma spectrum
Yanagawa, J.; Tran, L. M.; Fung, E.; Wallace, W. D.; Prosper, A. E.; Fishbein, G. A.; Shea, C.; Hong, R.; Liu, B.; Salehi-Rad, R.; Deng, J. Z.; Gower, A.; Campbell, J. D.; Mazzilli, S. A.; Beane, J.; Kadara, H.; Lenburg, M. E.; Spira, A.; Aberle, D. R.; Krysan, K.; Dubinett, S. M.
Show abstract
Determining the clinical significance of CT scan-detected subsolid pulmonary nodules requires an understanding of the molecular and cellular features that may foreshadow disease progression. We studied the alterations at the transcriptome level in both immune and non-immune cells, utilizing single-cell RNA sequencing, to compare the microenvironment of subsolid, solid, and non-involved lung tissues from surgical resection specimens. This evaluation of early spectrum lung adenocarcinoma reveals a significant decrease in the cytolytic activities of natural killer and natural killer T cells, accompanied by a reduction of effector T cells as well as an increase of CD4+ regulatory T cells in subsolid lesions. Characterization of non-immune cells revealed that both cancer-associated alveolar type 2 cells and fibroblasts contribute to the deregulation of the extracellular matrix, potentially affecting immune infiltration in subsolid lesions through ligand-receptor interactions. These findings suggest a decrement of immune surveillance in subsolid lesions.
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