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Effect of IL-17A on the migration and invasion of NPC cells and related mechanisms.

ABSTRACT: In carcinogenesis, inflammasomes may play contradictory roles through facilitating anti-tumor immunity or inducing oncogenic factors. Their function in cancer remains poorly characterized. In this study, we explored the effect of interleukin-17A (IL-17A) on the migration and invasion activity of nasopharyngeal carcinoma (NPC) cell lines and account for related mechanisms. Our results revealed that exogenous IL-17A promoted cell migration and invasion significantly in both NPC-039 and CNE-2Z cell lines. In addition, the expression of matrix metalloproteinase-2 (MMP-2)/-9 and Vimentin could be elevated by IL-17A stimulation; meanwhile the expression of E-cadherin was decreased. The results also show that IL-17A could activate the p38 signaling pathway in IL-17A-stimulated NPC-039 and CNE-2Z cell lines. Combining treatment with a p38 inhibitor (SB203580) resulted in decreased invasion capabilities of NPC-039 and CNE-2Z cell lines. SB203580 also inhibited the expression of MMP-2/-9 and increased the expression of E-cadherin in IL-17A-stimulated NPC-039 and CNE-2Z cell lines. IL-17A also could activate NF-?B in NPC-039 and CNE-2Z cell lines. In summary, our data show that IL-17A promote the cell migration and invasion of NPC cells. The effect of IL-17A on cell migration and invasion may be mediated via regulation of the expression of MMP-2/-9 and epithelial-mesenchymal transition (EMT) via p38-NF-?B signaling pathway. Thus, IL-17A or its related signaling pathways may be a promising target for preventing and inhibiting NPC metastasis.

SUBMITTER: Wang L

PROVIDER: S-EPMC4171532 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Effect of IL-17A on the migration and invasion of NPC cells and related mechanisms.

Wang Lixin L Ma Ruixia R Kang Zhaopeng Z Zhang Yupeng Y Ding Hongcheng H Guo Weina W Gao Qing Q Xu Min M

PloS one 20140922 9

In carcinogenesis, inflammasomes may play contradictory roles through facilitating anti-tumor immunity or inducing oncogenic factors. Their function in cancer remains poorly characterized. In this study, we explored the effect of interleukin-17A (IL-17A) on the migration and invasion activity of nasopharyngeal carcinoma (NPC) cell lines and account for related mechanisms. Our results revealed that exogenous IL-17A promoted cell migration and invasion significantly in both NPC-039 and CNE-2Z cell ...[more]

PMID: 25244643

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Project description:PurposeEpithelial to mesenchymal transition (EMT) can contribute to gastric cancer (GC) progression and recurrence following therapy. Tumor-associated neutrophils (TANs) are associated with poor outcomes in a variety of cancers. However, it is not clear whether TANs interact with the EMT process during GC development.MethodsImmunohistochemistry was performed to examine the distribution and levels of CD66?+?neutrophils in samples from 327 patients with GC. CD66b?+?TANs were isolated either directly from GC cell suspensions or were conditioned from healthy donor peripheral blood polymorphonuclear neutrophils (PMNs) stimulated with tumor tissue culture supernatants (TTCS) and placed into co-culture with MKN45 or MKN74 cells, after which migration, invasion and EMT were measured. Interleukin-17a (IL-17a) was blocked with a polyclonal antibody, and the STAT3 pathway was blocked with the specific inhibitor AG490.ResultsNeutrophils were widely distributed in gastric tissues of patients with GC and were enriched predominantly at the invasion margin. Neutrophil levels at the invasion margin were an independent predictor of poor disease-free survival (DFS) and disease-specific survival (DSS). IL-17a?+?neutrophils constituted a large portion of IL-17a-producing cells in GC, and IL-17a was produced at the highest levels in co-culture compared with that in TANs not undergoing co-culture. TANs enhanced the migration, invasion and EMT of GC cells through the secretion of IL-17a, which activated the Janus kinase 2/signal transducers and activators of transcription (JAK2/STAT3) pathway in GC cells, while deprivation of IL-17a using a neutralizing antibody or inhibition of the JAK2/STAT3 pathway with AG490 markedly reversed these TAN-induced phenotypes in GC cells induced by TANs.ConclusionsNeutrophils correlate with tumor stage and predict poor prognosis in GC. TANs produce IL-17a, which promotes EMT of GC cells through JAK2/STAT3 signalling. Blockade of IL-17a signalling with a neutralizing antibody inhibits TAN-stimulated activity in GC cells. Therefore, IL-17a-targeted therapy might be used to treat patients with GC.

Project description:Considering the high metastatic potential of osteosarcoma, not only pro‑apoptosis, but also anti‑metastasis is important for anti‑osteosarcoma therapy. Previously, the authors reported the pro‑apoptotic and tumor‑inhibitory effects of theabrownin (TB) on osteosarcoma cells; however, its effects on the metastasis‑related migration and invasion of osteosarcoma cells remain unknown. The present study conducted RNA sequencing (RNA‑seq) on xenograft zebrafish samples and performed in vitro experiments, including RT‑qPCR, cell viability analysis, clone formation assay, cell cycle analysis, immunofluorescence, cell migration assay, cell invasion assay, wound healing assay and western blot (WB) analysis to evaluate the anti‑metastatic effects and mechanism of TB against osteosarcoma cells. The RNA‑seq data revealed that TB significantly downregulated the expression of genes involved in the microtubule bundle formation of U2OS cells, which was verified by RT‑qPCR. The cell viability and clone formation data indicated that TB significantly inhibited U2OS cell viability and colony numbers. The results of cell cycle analysis revealed the blocked cell cycle progression of U2OS by TB. The immunofluorescent data revealed an evident cytoskeleton‑inhibitory effect of TB against the microfilament and microtubule formation of U2OS cells. The results of cell migration and invasion demonstrated that TB significantly inhibited U2OS cell migration and invasion. The results of WB analysis revealed that TB significantly regulated key molecules of epithelial‑mesenchymal transition [EMT; e.g., E‑cadherin, vimentin, Snail‑1, Slug and zinc finger E‑box‑binding homeobox 1 (ZEB‑1)] and those of the nuclear factor (NF)‑κB pathway (e.g., NF‑κB, phospho‑IKKα and phospho‑IKKβ), indicating that NF‑κB pathway‑related EMT suppression may mediate the mechanisms underlying the anti‑migratory and anti‑invasive effects of TB against osteosarcoma. To the best of our knowledge, this is the first study on the inhibitory effects and mechanisms of TB on the cytoskeleton‑dependent cell cycle, migration and invasion of human osteosarcoma cells. The findings presented herein suggest that TB may be a promising anti‑metastatic candidate for anti‑osteosarcoma therapy.

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Effect of IL-17A on the migration and invasion of NPC cells and related mechanisms.

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Effect of IL-17A on the migration and invasion of NPC cells and related mechanisms.

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