Project description:Metastasis is a major cause leading to mortality for lung cancer patients. We identified YWHAZ as a potential metastasis-promoting candidate and found that overexpression of YWHAZ promotes lung cancer cell proliferation, anchorage-independent growth, migration, and invasion in vitro, as well as tumorigenesis and metastasis in vivo. It not only increases cell protrusions and branchings but also induces epithelial-mesenchymal transition. Most importantly, YWHAZ protein could prevent £]-catenin from ubiquitination via its association with £]-catenin and enhance slug transcriptional activity which is regulated by £]-catenin/TCF signaling pathway. Moreover, YWHAZ expression was higher in tumors than in adjacent normal tissues in 63 Non-small-cell lung cancer (NSCLC) patients. NSCLC patients with high YWHAZ expressing tumors had shorter overall survival than those with low-expressing tumors. We conclude that YWHAZ play a critical role in promoting NSCLC metastasis. In this investigation, we used a lung cancer invasion cell model to identify the genes involved in cancer progression. YWHAZ is a potential oncogene whose expression is correlated to the survival of patients with breast, prostate and liver cancers. However, the role of YWHAZ in lung caner progression has not been reported, particularly in metastasis. Here, YWHAZ was ectopically expressed in lower invasive lung cancer cell line its impact on colonogenesis, migration and invasiveness was assessed. The underlying mechanism was explored by YWHAZ-expressed transfectants and microarrays and the clinical relevance was evaluated by quantitative RT-PCR.
Project description:Metastasis is a major cause leading to mortality for lung cancer patients. We identified YWHAZ as a potential metastasis-promoting candidate and found that overexpression of YWHAZ promotes lung cancer cell proliferation, anchorage-independent growth, migration, and invasion in vitro, as well as tumorigenesis and metastasis in vivo. It not only increases cell protrusions and branchings but also induces epithelial-mesenchymal transition. Most importantly, YWHAZ protein could prevent £]-catenin from ubiquitination via its association with £]-catenin and enhance slug transcriptional activity which is regulated by £]-catenin/TCF signaling pathway. Moreover, YWHAZ expression was higher in tumors than in adjacent normal tissues in 63 Non-small-cell lung cancer (NSCLC) patients. NSCLC patients with high YWHAZ expressing tumors had shorter overall survival than those with low-expressing tumors. We conclude that YWHAZ play a critical role in promoting NSCLC metastasis.
Project description:Hypoxia is closely linked to chemotherapy resistance and accelerates breast cancer progression. However, the underlying mechanism of resistance to hypoxic chemotherapy remains uncertain. ZNF207 was identified as a differentially expressed gene involved in hypoxia and chemotherapy resistance by RNA-sequencing array. ZNF207 expression was elevated in lung, breast, liver, colon, and ovarian cancers, and its positive expression was correlated significantly with advanced TNM stage, lymph node metastasis, and poor prognosis. ZNF207 overexpression promoted the proliferation, invasion capabilities, and stemness of breast cancer cells by activating the HIF-1alpha-PPAR-gamma-glycolysis signaling pathway. Notably, ZNF207 was directly bound to the coiled-coil domain of YWHAZ, thereby accelerating HIF-1alpha deacetylation in an HDAC4-dependent manner. Furthermore, ZNF207 might stabilize YWHAZ by inhibiting its degradation via TRIM67 through a ubiquitin-dependent mechanism. ZNF207 overexpression enhanced resistance to doxorubicin and vinorelbine. Conversely, ZNF207-DeltaGLE overexpression disrupted HIF-1alpha-PPAR-gamma-glycolysis signaling and abolished chemotherapy resistance. Additionally, ZNF207 expression was higher in patients with breast cancer who exhibited poor treatment outcomes (Miller/Payne grades 1-2) than in those with more favorable outcomes (Miller/Payne grades 3-5). Sappanchalcone, a specific ZNF207 inhibitor, impedes breast cancer progression while exerting a synergistic effect with chemotherapy. Our findings revealed that ZNF207 expression was elevated in breast cancer under hypoxic conditions, promoting proliferation and invasion by activating HIF-1alpha through accelerated deacetylation in a positive feedback loop. The interaction between ZNF207 and YWHAZ enhances HIF-1alpha stability, ultimately accelerating therapeutic resistance in breast cancer.
Project description:Hypoxia is closely linked to chemotherapy resistance and accelerates breast cancer progression. However, the underlying mechanism of resistance to hypoxic chemotherapy remains uncertain. ZNF207 was identified as a differentially expressed gene involved in hypoxia and chemotherapy resistance by RNA-sequencing array. ZNF207 expression was elevated in lung, breast, liver, colon, and ovarian cancers, and its positive expression was correlated significantly with advanced TNM stage, lymph node metastasis, and poor prognosis. ZNF207 overexpression promoted the proliferation, invasion capabilities, and stemness of breast cancer cells by activating the HIF-1alpha-PPAR-gamma-glycolysis signaling pathway. Notably, ZNF207 was directly bound to the coiled-coil domain of YWHAZ, thereby accelerating HIF-1alpha deacetylation in an HDAC4-dependent manner. Furthermore, ZNF207 might stabilize YWHAZ by inhibiting its degradation via TRIM67 through a ubiquitin-dependent mechanism. ZNF207 overexpression enhanced resistance to doxorubicin and vinorelbine. Conversely, ZNF207-DeltaGLE overexpression disrupted HIF-1alpha-PPAR-gamma-glycolysis signaling and abolished chemotherapy resistance. Additionally, ZNF207 expression was higher in patients with breast cancer who exhibited poor treatment outcomes (Miller/Payne grades 1-2) than in those with more favorable outcomes (Miller/Payne grades 3-5). Sappanchalcone, a specific ZNF207 inhibitor, impedes breast cancer progression while exerting a synergistic effect with chemotherapy. Our findings revealed that ZNF207 expression was elevated in breast cancer under hypoxic conditions, promoting proliferation and invasion by activating HIF-1alpha through accelerated deacetylation in a positive feedback loop. The interaction between ZNF207 and YWHAZ enhances HIF-1alpha stability, ultimately accelerating therapeutic resistance in breast cancer.
Project description:S100A4 is a tumor metastasis-promoting protein and drives lung cancer cell invasion and its elevation level is associated with lymphovascular invasion and the decreased overall survival among lung cancer patients. However, how it alters cancer cell metabolism and how metabolic changes affect the invasive and metastatc capacity are unknown.
Project description:Background: JAG-1 is a ligand of Notch signaling and can regulate cell differentiation and proliferation in cancers. Recent studies indicated that JAG1 is a gene associated with cancer progression. Therefore, we investigated the role of JAG1 in lung cancer progression. Methods: The expression of JAG1 was manipulated by overexpression or RNA silencing in several human lung cell lines. The effect of JAG1 on tumorigenesis and invasion was assessed by the cell anchorage-independent growth, cell proliferation, cell migration and invasion assays in vitro as well as metastasis in vivo. The potential downstream genes of JAG1 were identified by oligonucleotide microarrays and quantitative reverse transcription¡Vpolymerase chain reaction (RT-PCR). We further measured JAG1 expression in lung cancer specimens by RT-PCR. Correlation between JAG1 expression and overall survival of lung cancer patients was determined by using the log-rank test and multivariable Cox proportional hazards regression analysis. All statistical tests were two-sided. Results: JAG1 enhanced anchorage-independent growth, cell migration, invasion in the lower invasive cells, CL1-0. JAG1 also increased the capability of migration and invasion in the other two lung cancer cell lines (A549 and NCI-H226). The silencing of JAG1 inhibited migration and invasion activities of the higher invasive cells, CL1-5, by siRNA technology. The invasion-promoting activity of JAG1 was also demonstrated in vivo by using a mouse metastasis model. By microarray analysis, we found that the expression of heat shock 70kDa protein 2 (HSPA2) was activated by JAG1 overexpression and eliminated by JAG1 silencing. Moreover, lung cancer patients with high JAG1 expressing tumors had shorter overall survival than those with low-expressing tumors. Conclusion: JAG1 might be an oncogene which promotes colonogenesis and metastasis, and high JAG1 expression is associated with shorten survival in lung cancer. In this investigation, we used a lung cancer invasion cell model to identify the genes involved in cancer progression. JAG1 is a potential oncogene whose expression is correlated to the survival of patients with breast, prostate and liver cancers. However, the role of JAG1 in lung caner progression has not been reported, particularly in metastasis. Here, JAG1 was ectopically expressed in lower invasive lung cancer cell line its impact on colonogenesis, migration and invasiveness was assessed. The underlying mechanism was explored by JAG1-expressed transfectants and microarrays and the clinical relevance was evaluated by quantitative RT-PCR.