Ribonucleotide reductase subunit M2 promotes proliferation and epithelial–mesenchymal transition via the JAK2/STAT3 signaling pathway in retinoblastoma

Epithelial–mesenchymal transition (EMT) plays a key role in the process of pulmonary fibrosis (PF). Increasing evidences have shown that exaggerated EMT in recurrent pulmonary injury mediates the early pathogenesis of PF. This study aimed to evaluate EMT of human alveolar epithelial cells (A549) when cocultured with human macrophages Tohoku hospital pediatrics-1 (THP-1) induced by lipopolysaccharide (LPS) and investigate the role of Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling pathway. Firstly, we detected the inflammatory and EMT biomarkers in A549 cells monoculture and A549/THP-1 cells coculture in the presence or absence of LPS. Then, the activation of JAK2/STAT3 signaling pathway was determined in coculture. Interestingly, inflammatory markers, such as interleukin (IL)-6, matrix metalloproteinase (MMP)-9, transforming growth factor (TGF)- β, and collagen type 1 (COL-1), were enhanced in LPS treated coculture. Besides, the expression of E-cadherin decreased but α-smooth muscle actin expression increased, indicating the presence of EMT in A549 cells when cocultured with THP-1 macrophages. However, these phenotypes could not be observed in LPS-treated A549 cells monoculture. Meanwhile, JAK2/STAT3 signaling pathway was activated, and the STAT3 DNA-binding and inflammatory markers were inhibited by Stattic. Together, these findings demonstrate the key role of JAK2/STAT3 signaling pathway in LPS promoted EMT of A549 in the presence of THP-1 macrophages as an in vitro PF model.

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Abstract 4803: Cancer-associated fibroblast promotes gastric cancer invasion and epithelial-mesenchymal transition via the IL-6/JAK/STAT3 signaling pathway

10.1158/1538-7445.am2014-4803 ◽

2014 ◽

Cited By ~ 1

Author(s):

Liping Su ◽

Xiongyan Wu ◽

Quan Zhou ◽

Chenchen Wang ◽

Bingya Liu

Keyword(s):

Gastric Cancer ◽

Signaling Pathway ◽

Epithelial Mesenchymal Transition ◽

Cancer Invasion ◽

Mesenchymal Transition ◽

Cancer Associated Fibroblast ◽

Stat3 Signaling ◽

Stat3 Signaling Pathway

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Long Noncoding RNA HOST2 Promotes Epithelial-Mesenchymal Transition, Proliferation, Invasion and Migration of Hepatocellular Carcinoma Cells by Activating the JAK2-STAT3 Signaling Pathway

Cellular Physiology and Biochemistry ◽

10.1159/000495231 ◽

2018 ◽

Vol 51 (1) ◽

pp. 301-314 ◽

Cited By ~ 18

Author(s):

Yang Wu ◽

Tan Yuan ◽

Wei-Wei Wang ◽

Peng-Lei Ge ◽

Zhi-Qiang Gao ◽

...

Keyword(s):

Signaling Pathway ◽

Noncoding Rna ◽

Epithelial Mesenchymal Transition ◽

Migration And Invasion ◽

Mesenchymal Transition ◽

Invasion And Migration ◽

Stat3 Signaling ◽

Stat3 Signaling Pathway ◽

And Migration ◽

E Cadherin

Background/Aims: This study aims to examine the effect of long noncoding RNA HOST2 (LncRNA HOST2) on epithelial-mesenchymal transition (EMT), proliferation, invasion and migration of hepatocellular carcinoma (HCC) cells via activation of the JAK2-STAT3 signaling pathway. Methods: HCC and para-cancerous tissues were collected from 136 HCC patients. Immunohistochemistry was used to detect the expression of JAK2 and STAT3. HCC SMMC7721 cells were grouped into blank, negative control (NC), HOST2 mimic and HOST2 inhibitor groups. The mRNA and protein expression levels of HOST2, JAK2, STAT3, E-cadherin, vimentin, Snail, Slug, Twist and Zeb1 in tissues and cells were determined by reverse transcription -quantitative polymerase chain reaction (RT-qPCR) and Western blotting, respectively. An MTT assay, scratch test and Transwell assay were applied to measure cell proliferation, migration and invasion, respectively. Results: The levels of JAK2, STAT3 and vimentin were higher in HCC tissues, while the expression of E-cadherin was lower in HCC tissues compared with para-cancerous tissues. The silencing of HOST2 significantly decreased cell proliferation, migration and invasion, reduced the levels of HOST2, JAK2, STAT3 and vimentin, and elevated the expression of E-cadherin. HOST2 silencing also decreased the levels of Snail, Slug and Twist but increased the level of Zeb1 protein, while the opposite findings were observed in the HOST2 mimic group. Conclusion: These results reveal a possible mechanism in HCC in which LncRNA HOST2 may increase EMT and enhance proliferation, invasion and metastasis of HCC cells via activation of the JAK2-STAT3 signaling pathway.

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STEAP1 facilitates metastasis and epithelial–mesenchymal transition of lung adenocarcinoma via the JAK2/STAT3 signaling pathway

Bioscience Reports ◽

10.1042/bsr20193169 ◽

2020 ◽

Vol 40 (6) ◽

Author(s):

Shu-fen Huo ◽

Wen-li Shang ◽

Min Yu ◽

Xiao-ping Ren ◽

Hong-xia Wen ◽

...

Keyword(s):

Epithelial Cells ◽

Lung Adenocarcinoma ◽

Signaling Pathway ◽

Epithelial Mesenchymal Transition ◽

Janus Kinase ◽

Normal Lung ◽

Migration And Invasion ◽

Mesenchymal Transition ◽

Stat3 Signaling ◽

Stat3 Signaling Pathway

Abstract Six-transmembrane epithelial antigen of prostate-1 (STEAP1) is a relatively newly identified gene target from prostate cancer, breast cancer, and gastric cancer. However, functions of STEAP1 in lung adenocarcinoma (LUAD) are still unknown. In the present study, we explored the molecular and cellular mechanisms of STEAP1 in LUAD. Western blot and Q-PCR were conducted to detect the protein and mRNA expressions respectively. The cell proliferation was tested by CCK8 assay. The effects of STEAP1 on the metastasis and epithelial–mesenchymal transition (EMT) of LUAD were evaluated by EdU assay, wound healing assay, and transwell migratory assay. H1650, H358, HCC827, H1299, H23, A549, H1693 were selected as human LUAD cell lines in the study. Results have shown that STEAP1 expression was up-regulated in LUAD cells compared with normal lung epithelial cells. Knockdowning of STEAP1 suppressed the proliferation, migration, and invasion of LUAD epithelial cells. Importantly, after comparing the proliferation, migration, and invasion of LUAD to the corresponding control groups treated in STAT3 inhibitor ADZ1480, we found that STEAP1 regulates EMT via Janus kinase 2/signal transducer and activator of transcription 3 (JAK2/STAT3) signaling pathway. In conclusion, STEAP1 can serve as a therapeutic target, and it may have important clinical implications for LUAD treatment.

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