Identification and Characterization of Cancer-Associated Fibroblast Subpopulations in Lung Adenocarcinoma

Daeseung Kim, Jeong Seon Kim, Inyoung Cheon, Seo Ree Kim, Sang Hoon Chun, Jae Jun Kim, Sieun Lee, Jung Sook Yoon, Soon Auck Hong, Hye Sung Won, Keunsoo Kang, Young Ho Ahn, Yoon Ho Ko

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Cancer-associated fibroblasts (CAFs) reside within the tumor microenvironment, facilitating cancer progression and metastasis via direct and indirect interactions with cancer cells and other stromal cell types. CAFs are composed of heterogeneous subpopulations of activated fibroblasts, including myofibroblastic, inflammatory, and immunosuppressive CAFs. In this study, we sought to identify subpopulations of CAFs isolated from human lung adenocarcinomas and describe their transcriptomic and functional characteristics through single-cell RNA sequencing (scRNA-seq) and subsequent bioinformatics analyses. Cell trajectory analysis of combined total and THY1 + CAFs revealed two branching points with five distinct branches. Based on Gene Ontology analysis, we denoted Branch 1 as “immunosuppressive”, Branch 2 as “neoantigen presenting”, Branch 4 as “myofibroblastic”, and Branch 5 as “proliferative” CAFs. We selected representative branch-specific markers and measured their expression levels in total and THY1 + CAFs. We also investigated the effects of these markers on CAF activity under coculture with lung cancer cells. This study describes novel subpopulations of CAFs in lung adenocarcinoma, highlighting their potential value as therapeutic targets.

Original languageEnglish
Article number3486
JournalCancers
Volume14
Issue number14
DOIs
StatePublished - Jul 2022

Bibliographical note

Publisher Copyright:
© 2022 by the authors.

Keywords

  • cancer-associated fibroblasts
  • heterogeneity
  • lung adenocarcinoma
  • single-cell RNA sequencing
  • tumor microenvironment

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