IL-8 mediates a positive loop connecting increased neutrophil extracellular traps (NETs) and colorectal cancer liver metastasis
| Autor: | Jun Hong, Rui Zhang, Jinhong Chen, Lu-Yu Yang, Ju-Bo Zhang, Jian Wang, Han-Kun Hao, Yaping Wang, Lu Liu, Jieliang Zuo |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
IL-8 business.industry Colorectal cancer Interleukin Inflammation Neutrophil extracellular traps Malignancy medicine.disease colorectal cancer (CRC) Metastasis liver metastasis 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Oncology 030220 oncology & carcinogenesis Cancer cell Neutrophil extracellular traps (NETs) medicine Cancer research Interleukin 8 medicine.symptom business Research Paper |
| Zdroj: | Journal of Cancer |
| ISSN: | 1837-9664 |
| DOI: | 10.7150/jca.44215 |
| Popis: | Host and tumorous inflammation actively affect liver metastasis of colorectal cancer (CRC). Neutrophils have been recognized as one active participant in metastasis procedure, with controversial roles however. Activated neutrophils release extracellular traps (NETs) which are involved in infection and multiple pathological conditions. NETs on cancer metastasis is getting recognized but less elucidated in mechanism. How NETs interact with cancer cells is still largely unknown. In this study, we found that neutrophils from CRC patients, especially those with liver metastatic, underwent remarkably enhanced NETs. Clinically, sera and pathological NETs marker closely correlated with onset of liver metastasis. Through in vivo and in vitro studies, we proved that increased NETs positively contribute to onset of CRC liver metastasis. Digesting NETs with DNase 1 diminished the increased liver metastasis associated with NETs. In detail, NETs trapped CRC cells in liver and exerted no cytotoxicity on tumor cells, but boosted tumorous proliferation and invasion capacity. We further found this enhanced malignancy of trapped CRC cells was due to the elevated tumorous interleukin (IL)-8 expression triggered by NETs. Blocking IL-8 activity effectively abrogated the enhanced proliferation and invasion triggered by NETs. Moreover, overproduced IL-8 in turn activate neutrophils towards NETs formation, thus forming a positive loop optimizing CRC liver metastasis. Collectively, our study propose a novel positive feedback between elevated tumorous IL-8 and NETs to promote CRC liver metastasis, and identify potential strategy against liver metastasis. |
| Databáze: | OpenAIRE |
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