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TREM-1(low) is a novel characteristic for tumor-associated macrophages in lung cancer

OBJECTIVE: To explore the expression feature and biological functions of TREM-1 on tumor-associated macrophages (TAMs) in lung cancer. RESULTS: The levels of TREM-1 on tissue-infiltrating monocytes/macrophage from tumor nest were significantly lower than those from nonturmor tissue or peripheral blo...

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Detalles Bibliográficos
Autores principales: Zhang, Guangbo, Liu, Hongmei, Huang, Jian, Chen, Siwen, Pan, Xudong, Huang, Haitao, Wang, Ling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Impact Journals LLC 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5130024/
https://www.ncbi.nlm.nih.gov/pubmed/27244892
http://dx.doi.org/10.18632/oncotarget.9639
Descripción
Sumario:OBJECTIVE: To explore the expression feature and biological functions of TREM-1 on tumor-associated macrophages (TAMs) in lung cancer. RESULTS: The levels of TREM-1 on tissue-infiltrating monocytes/macrophage from tumor nest were significantly lower than those from nonturmor tissue or peripheral blood samples. Clinical analysis indicated that the levels of TREM-1-related TAMs were significantly decreased during cancer stages progression. The tumor-bearing mouse model further confirmed that the expression of TREM-1 on TAMs was significantly decreased with tumor growth. In addition, we found the activation of TREM-1 could significantly enhance the secretion of IL-1β by TAM in vitro. Furthermore, T-bet but not Eomes was found to be the key transcription factor for the TREM-1 expression on monocytes/macrophage. METHODS: A total of 40 patients with non-small cell lung cancer (NSCLC) were enrolled in this study. The expression characteristics of TREM-1 in blood and tissue-infiltrating monocytes/macrophage were examined by flow cytometry analysis. After the treatment of TREM-1 antibody, which is an agonist of TREM-1, cytokines secreted by TAM were then analyzed. In LLC-tumor bearing mouse model, we further investigated the dynamic expression feature of TREM-1 on macrophage with tumor growth. Moreover, we explored the transcription factor for regulating TREM-1 expression on monocyes/macrophage with wildtype, T-bet Ko or Eomes Ko mice. CONCLUSION: The levels of TREM-1 were remarkably decreased during tumor progression. The low expression level of TREM-1 might be a characteristic for TAMs in lung cancer.