Tumor Microenvironment Properties are Associated With Low CD68-positive Cell Infiltration and Favorable Disease-free Survival in EGFR-mutant Lung Adenocarcinoma.

Abstract:

BACKGROUND:The benefits of immune checkpoint inhibitors for first-line treatment in patients with lung adenocarcinoma harboring EGFR mutations are unclear. The effects of ICIs depend on the tumor microenvironment (TME). Differences in TME properties between mutant and wild-type EGFR have not been fully characterized. PATIENTS AND METHODS:We collected 105 surgically resected (50 EGFR mutated and 55 EGFR wild-type), treatment-naïve lung adenocarcinoma tissues with clinical data to investigate the landscape and compartmentalization of tumor-infiltrating immune cells with respect to EGFR status by immunohistochemistry. The normalized FPKM values of data for 531 patients were obtained from The Cancer Genome Atlas (TCGA) Data Portal (https://portal.gdc.cancer.gov/). RESULTS:CD68-positive cells within the tumor niche exhibited more intensive infiltration in wild-type EGFR than in mutations, and was related to lymph node invasion. In the RNA-Seq analysis, MMP9 and VEGFA showed higher levels in wild-type EGFR than in mutant cases. The EGFR mutation independently predicted a favorable disease-free survival. CONCLUSION:The CD68-positive cells play a crucial role in discriminating the TME between different EGFR statuses.

journal_name

Clin Lung Cancer

journal_title

Clinical lung cancer

authors

Gong Z,Chen J,Cheng JN,Sun C,Jia Q,Diao X,Zhu B

doi

10.1016/j.cllc.2018.03.011

subject

Has Abstract

pub_date

2018-09-01 00:00:00

pages

e551-e558

issue

5

eissn

1525-7304

issn

1938-0690

pii

S1525-7304(18)30053-6

journal_volume

19

pub_type

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