Stimulation of hepatocarcinogenesis by neutrophils upon induction of oncogenic kras expression in transgenic zebrafish
| Autor: | Yan, Chuan, Huo, Xiaojing, Wang, Shu, Feng, Yi, Gong, Zhiyuan |
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| Rok vydání: | 2015 |
| Předmět: |
Carcinogenesis
Neutrophils TUNEL terminal deoxynucleotidyl transferase dUTP nick end labeling RT-qPCR reverse transcription-quantitative PCR Animals Genetically Modified Proto-Oncogene Proteins p21(ras) Tgf-β Liver Neoplasms Experimental FACS fluorescence-activated cell sorting Animals NN naïve neutrophil RNA Neoplasm Tumor-associated neutrophil (TAN) Zebrafish Inflammation Gcsfr Granulocyte colony-stimulating factor receptor Hepatology Zebrafish Proteins Tumor initiation Flow Cytometry TAN tumor-associated neutrophil Gene Expression Regulation Neoplastic Liver dpf day post fertilization H&E hematoxylin and eosin LPS lipopolysaccharide HCC hepatocellular carcinoma Research Article Signal Transduction |
| Zdroj: | Journal of Hepatology Yan, C, Huo, X, Wang, S, Feng, Y & Gong, Z 2015, ' Stimulation of hepatocarcinogenesis by neutrophils upon induction of oncogenic kras expression in transgenic zebrafish ', Journal of Hepatology, vol. 63, no. 2, pp. 420-428 . https://doi.org/10.1016/j.jhep.2015.03.024 |
| ISSN: | 0168-8278 |
| DOI: | 10.1016/j.jhep.2015.03.024 |
| Popis: | Background & Aims: Chronic inflammation is a major etiological factor for hepatocellular carcinoma (HCC), but how immune cells respond in the initiation of hepatocarcinogenesis remains uncharacterized. This study aims to investigate the response and roles of neutrophils in early hepatocarcinogenesis. Methods: By inducible expression of oncogenic krasV12 in hepatocytes in transgenic zebrafish combined with live imaging of neutrophils in transparent larvae, the response of neutrophils to oncogenic liver was characterized and their roles investigated by pharmaceutical and genetic manipulations. Results: We found a rapid recruitment of neutrophils to the liver upon induction of krasV12 expression. Pharmaceutical stimulation of neutrophils resulted in further increases of neutrophils in oncogenic livers, liver size and tumor severity, while inhibition of neutrophils caused decreases of liver-associated neutrophils and liver size. Time-lapse video indicated that neutrophils had a stagnant migratory pattern meandering along the tumor edge but became relatively stationary upon entering the krasV12-expressing liver. Both oncogenic hepatocytes and tumor-associated neutrophils (TANs) were isolated via fluorescence-activated cell sorting. Molecular analyses indicated a pro-inflammatory microenvironment, as marked by increased tgfβ1a expression in krasV12-expressing hepatocytes and a loss of anti-tumor activities in TANs. Depletion of Tgf-β significantly reduced the number of TANs and the size of oncogenic liver. Conclusions: An inflammatory cue from oncogenic hepatocytes upon induction of krasV12 expression causes a rapid recruitment of neutrophils to oncogenic liver and the neutrophils play a promoting role in early hepatocarcinogenesis. |
| Databáze: | OpenAIRE |
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