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Cancer Res. 2017 Apr 15;77(8):1905-1917. doi: 10.1158/0008-5472.CAN-16-1978. Epub 2017 Feb 14.

Extracellular Matrix Receptor Expression in Subtypes of Lung Adenocarcinoma Potentiates Outgrowth of Micrometastases.

Author information

1
Department of Pathology, Yale University School of Medicine, New Haven, Connecticut.
2
Yale Cancer Center, Yale University School of Medicine, New Haven, Connecticut.
3
Department of Medicine, Yale University School of Medicine, New Haven, Connecticut.
4
Department of Pathology, Yale University School of Medicine, New Haven, Connecticut. don.nguyen@yale.edu.

Abstract

Mechanisms underlying the propensity of latent lung adenocarcinoma (LUAD) to relapse are poorly understood. In this study, we show how differential expression of a network of extracellular matrix (ECM) molecules and their interacting proteins contributes to risk of relapse in distinct LUAD subtypes. Overexpression of the hyaluronan receptor HMMR in primary LUAD was associated with an inflammatory molecular signature and poor prognosis. Attenuating HMMR in LUAD cells diminished their ability to initiate lung tumors and distant metastases. HMMR upregulation was not required for dissemination in vivo, but enhanced ECM-mediated signaling, LUAD cell survival, and micrometastasis expansion in hyaluronan-rich microenvironments in the lung and brain metastatic niches. Our findings reveal an important mechanism by which disseminated cancer cells can coopt the inflammatory ECM to persist, leading to brain metastatic outgrowths. Cancer Res; 77(8); 1905-17. ©2017 AACR.

PMID:
28196904
PMCID:
PMC5468792
DOI:
10.1158/0008-5472.CAN-16-1978
[Indexed for MEDLINE]
Free PMC Article

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