Article ; Online: Spon1+ inflammatory monocytes promote collagen remodeling and lung cancer metastasis through lipoprotein receptor 8 signaling.
JCI insight
2024 Volume 9, Issue 9
Abstract: Lung cancer is the leading cause of cancer-related deaths in the world, and non-small cell lung cancer (NSCLC) is the most common subset. We previously found that infiltration of tumor inflammatory monocytes (TIMs) into lung squamous carcinoma (LUSC) ... ...
Abstract | Lung cancer is the leading cause of cancer-related deaths in the world, and non-small cell lung cancer (NSCLC) is the most common subset. We previously found that infiltration of tumor inflammatory monocytes (TIMs) into lung squamous carcinoma (LUSC) tumors is associated with increased metastases and poor survival. To further understand how TIMs promote metastases, we compared RNA-Seq profiles of TIMs from several LUSC metastatic models with inflammatory monocytes (IMs) of non-tumor-bearing controls. We identified Spon1 as upregulated in TIMs and found that Spon1 expression in LUSC tumors corresponded with poor survival and enrichment of collagen extracellular matrix signatures. We observed SPON1+ TIMs mediate their effects directly through LRP8 on NSCLC cells, which resulted in TGF-β1 activation and robust production of fibrillar collagens. Using several orthogonal approaches, we demonstrated that SPON1+ TIMs were sufficient to promote NSCLC metastases. Additionally, we found that Spon1 loss in the host, or Lrp8 loss in cancer cells, resulted in a significant decrease of both high-density collagen matrices and metastases. Finally, we confirmed the relevance of the SPON1/LRP8/TGF-β1 axis with collagen production and survival in patients with NSCLC. Taken together, our study describes how SPON1+ TIMs promote collagen remodeling and NSCLC metastases through an LRP8/TGF-β1 signaling axis. |
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MeSH term(s) | Animals ; Humans ; Mice ; Carcinoma, Non-Small-Cell Lung/pathology ; Carcinoma, Non-Small-Cell Lung/metabolism ; Carcinoma, Non-Small-Cell Lung/genetics ; Carcinoma, Non-Small-Cell Lung/secondary ; Cell Line, Tumor ; Collagen/metabolism ; Extracellular Matrix Proteins/metabolism ; Extracellular Matrix Proteins/genetics ; LDL-Receptor Related Proteins/metabolism ; LDL-Receptor Related Proteins/genetics ; Lung Neoplasms/pathology ; Lung Neoplasms/metabolism ; Lung Neoplasms/secondary ; Lung Neoplasms/genetics ; Monocytes/metabolism ; Monocytes/pathology ; Neoplasm Metastasis ; Signal Transduction ; Transforming Growth Factor beta1/metabolism |
Chemical Substances | Collagen (9007-34-5) ; Extracellular Matrix Proteins ; LDL-Receptor Related Proteins ; low density lipoprotein receptor-related protein 8 ; TGFB1 protein, human ; Transforming Growth Factor beta1 |
Language | English |
Publishing date | 2024-05-08 |
Publishing country | United States |
Document type | Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't |
ISSN | 2379-3708 |
ISSN (online) | 2379-3708 |
DOI | 10.1172/jci.insight.168792 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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