scholarly journals DDIAS promotes STAT3 activation by preventing STAT3 recruitment to PTPRM in lung cancer cells

Oncogenesis ◽  
2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Joo-Young Im ◽  
Bo-Kyung Kim ◽  
Kang-Woo Lee ◽  
So-Young Chun ◽  
Mi-Jung Kang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Protein Tyrosine Phosphatase ◽  
Tyrosine Phosphatase ◽  
Lung Cancer Cells ◽  
Human Lung Cancer ◽  
Transactivation Domain ◽  
Protein Tyrosine ◽  
Stat3 Phosphorylation

AbstractDNA damage-induced apoptosis suppressor (DDIAS) regulates cancer cell survival. Here we investigated the involvement of DDIAS in IL-6–mediated signaling to understand the mechanism underlying the role of DDIAS in lung cancer malignancy. We showed that DDIAS promotes tyrosine phosphorylation of signal transducer and activator of transcription 3 (STAT3), which is constitutively activated in malignant cancers. Interestingly, siRNA protein tyrosine phosphatase (PTP) library screening revealed protein tyrosine phosphatase receptor mu (PTPRM) as a novel STAT3 PTP. PTPRM knockdown rescued the DDIAS-knockdown-mediated decrease in STAT3 Y705 phosphorylation in the presence of IL-6. However, PTPRM overexpression decreased STAT3 Y705 phosphorylation. Moreover, endogenous PTPRM interacted with endogenous STAT3 for dephosphorylation at Y705 following IL-6 treatment. As expected, PTPRM bound to wild-type STAT3 but not the STAT3 Y705F mutant. PTPRM dephosphorylated STAT3 in the absence of DDIAS, suggesting that DDIAS hampers PTPRM/STAT3 interaction. In fact, DDIAS bound to the STAT3 transactivation domain (TAD), which competes with PTPRM to recruit STAT3 for dephosphorylation. Thus we show that DDIAS prevents PTPRM/STAT3 binding and blocks STAT3 Y705 dephosphorylation, thereby sustaining STAT3 activation in lung cancer. DDIAS expression strongly correlates with STAT3 phosphorylation in human lung cancer cell lines and tissues. Thus DDIAS may be considered as a potential biomarker and therapeutic target in malignant lung cancer cells with aberrant STAT3 activation.

scholarly journals The receptor protein tyrosine phosphatase PTPRJ negatively modulates the CD98hc oncoprotein in lung cancer cells

Oncotarget ◽  
2018 ◽  
Vol 9 (34) ◽  
pp. 23334-23348 ◽  
Author(s):  
Sabrina D’Agostino ◽  
Delia Lanzillotta ◽  
Mariaconcetta Varano ◽  
Cirino Botta ◽  
Antonio Baldrini ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cancer Cells ◽  
Protein Tyrosine Phosphatase ◽  
Tyrosine Phosphatase ◽  
Lung Cancer Cells ◽  
Receptor Protein ◽  
Protein Tyrosine ◽  
Receptor Protein Tyrosine Phosphatase

scholarly journals Persistent effects of pair bonding in lung cancer cell growth in monogamous Peromyscus californicus

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Asieh Naderi ◽  
Elham Soltanmaohammadi ◽  
Vimala Kaza ◽  
Shayne Barlow ◽  
Ioulia Chatzistamou ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Nude Mice ◽  
Lung Cancer Cells ◽  
Human Lung Cancer ◽  
Lung Cancer Cell ◽  
Peromyscus Californicus ◽  
Pair Bonds ◽  
The Impact

Epidemiological evidence suggests that social interactions and especially bonding between couples influence tumorigenesis, yet whether this is due to lifestyle changes, homogamy (likelihood of individuals to marry people of similar health), or directly associated with host-induced effects in tumors remains debatable. In the present study, we explored if tumorigenesis is associated with the bonding experience in monogamous rodents at which disruption of pair bonds is linked to anxiety and stress. Comparison of lung cancer cell spheroids that formed in the presence of sera from bonded and bond-disrupted deer mice showed that in monogamous Peromyscus polionotus and Peromyscus californicus, but not in polygamous Peromyscus maniculatus, the disruption of pair bonds altered the size and morphology of spheroids in a manner that is consistent with the acquisition of increased oncogenic potential. In vivo, consecutive transplantation of human lung cancer cells between P. californicus, differing in bonding experiences (n = 9 for bonded and n = 7 for bond-disrupted), and nude mice showed that bonding suppressed tumorigenicity in nude mice (p<0.05), suggesting that the protective effects of pair bonds persisted even after bonding ceased. Unsupervised hierarchical clustering indicated that the transcriptomes of lung cancer cells clustered according to the serum donors’ bonding history while differential gene expression analysis pointed to changes in cell adhesion and migration. The results highlight the pro-oncogenic effects of pair-bond disruption, point to the acquisition of expression signatures in cancer cells that are relevant to the bonding experiences of serum donors, and question the ability of conventional mouse models to capture the whole spectrum of the impact of the host in tumorigenesis.

scholarly journals Long-Term Nitric Oxide Exposure Enhances Lung Cancer Cell Migration

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Arpasinee Sanuphan ◽  
Preedakorn Chunhacha ◽  
Varisa Pongrakhananon ◽  
Pithi Chanvorachote
Keyword(s):  
Nitric Oxide ◽  
Lung Cancer ◽  
Cell Migration ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Cancer Biology ◽  
Lung Cancer Cells ◽  
Human Lung Cancer ◽  
Dependent Manner

Nitric oxide (NO) found in the vicinity of lung cancer cells may play a role in the regulation of cancer cell behaviors. To explore the possible effects of NO on cell motility, human lung cancer cells were exposed to nontoxic concentrations of NO for 0–14 days, and the migratory characteristics of the cells were determined. The present study found that long-term treatment with NO significantly enhanced cell migration in a dose- and time-dependent manner. Furthermore, we found that the increased migratory action was associated with the increased expression of caveolin-1 (Cav-1), which in turn activated the focal adhesion kinase (FAK) and ATP-dependent tyrosine kinase (Akt) pathways. Notably, the NO-treated cells exhibited an increased number of filopodia per cell, as well as an increase in the levels of cell division cycle 42 (Cdc42) protein. Together, these results indicate that extended NO exposure has a novel effect on cell migration through a Cav-1-dependent mechanism, a finding that strengthens our understanding of cancer biology.

scholarly journals Beclin1-induced Autophagy Abrogates Radioresistance of Lung Cancer Cells by Suppressing Osteopontin

2012 ◽  
Vol 53 (3) ◽  
pp. 422-432 ◽  
Author(s):  
Seung-Hee Chang ◽  
Arash Minai-Tehrani ◽  
Ji-Young Shin ◽  
Sungjin Park ◽  
Ji-Eun Kim ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cell Growth ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Human Lung ◽  
Lung Cancer Cells ◽  
Human Lung Cancer ◽  
Lung Cancer Cell ◽  
Cancer Cell Growth ◽  
Human Lung Cancer Cells

Abstract Osteopontin (OPN) serves as an indicator of resistance to radiotherapy. However, the role of OPN in the development of acquired radioresistance in human lung cancer cells has not yet been fully elucidated. Therefore, the potential importance of OPN as a marker of lung cancer with a potential significant role in the development of radioresistance against repeated radiotherapy has prompted us to define the pathways by which OPN regulates lung cancer cell growth. In addition, autophagy has been reported to play a key role in the radiosensitization of cancer cells. Here, we report that increased OPN expression through induction of nuclear p53 following irradiation was inhibited by exogenous beclin-1 (BECN1). Our results clearly show that BECN1 gene expression led to induction of autophagy and inhibition of cancer cell growth and angiogenesis. Our results suggest that the induction of autophagy abrogated the radioresistance of the cancer cells. Interestingly, we showed that knockdown of OPN by lentivirus-mediated shRNA induced the autophagy of human lung cancer cell. Taken together, these results suggest that OPN and BECN1 can be molecular targets for overcoming radioresistance by controlling autophagy.

scholarly journals Terrein Inhibits Aggressive Phenotype of A549 Human Lung Cancer Cell through Suppression of HIF-1α

2021 ◽  
Vol 18 (11) ◽  
Author(s):  
Paiwan BUACHAN ◽  
Maneekarn NAMSA-AID ◽  
Wanlaya TANECHPONGTAMB
Keyword(s):  
Lung Cancer ◽  
Cancer Cells ◽  
Cancer Cell ◽  
A549 Cells ◽  
Specific Effect ◽  
Lung Cancer Cells ◽  
Human Lung Cancer ◽  
Migration And Invasion ◽  
Normal Cells ◽  
Aggressive Phenotype

Terrein is a fungal metabolite that has already been reported with anticancer properties. However, the effect on the aggressive phenotype of cancer cells has not been elucidated yet.  In the present study, the cytotoxicity of terrein was first determined against lung cancer cells (A549) model and compared with several normal cell lines (Vero, L6, and H9C2 cells). The data demonstrated that terrein had a specific effect on A549 cells relative to normal cells with high selectivity index values. Then, the hypoxic model that recognized to induce aggressive abilities was established in A549 cells by cobalt chloride (CoCl2) stimulation. With this model, terrein could reduce HIF-1α, a marker of hypoxia, and inhibit both migration and invasion of which the effect on invasion is more explicit. Our results demonstrated that terrein has a potential new role as the anti-aggressive phenotype by inhibiting cancer cell migration and invasion through HIF-1α reduction. HIGHLIGHTS Terrein, a secondary bioactive metabolite extracted from Aspergillus terreus, demonstrates anticancer effect on lung cancer cells with less cytotoxic on normal cells CoCl2 treatment was successfully used for creating hypoxic model which resulting in HIF-1a augmentation and aggressive abilities enhancement in lung cancer cells Terrein could reduce HIF-1a expression and invasive ability of lung cancer cells demonstrated the potential role as anti-metastatic agent for lung cancer GRAPHICAL ABSTRACT

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