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ros metastasis

Lihua Wang, Lijie Han, Zheying Tao, Zheng Zhu, Lei Han, Zhenfei Yang, Hao Wang, Dandan Dai, Liang Wu, Zhengzhong Yuan, Tongke Chen
Tumor metastasis is the leading cause of cancer death; due to the progress made in the elucidation of the mechanism of cancer cell metastasis, there is hope for patients with severe stages of cancer. Curcumin, as a novel anti-cancer drug, has been applied in cancer therapy; however, the toxicity of curcumin hinders its application. Herein, we constructed a novel derivative, WZ35, and evaluated its metastatic inhibition properties in vitro and in vivo. CCK-8 assay was performed to evaluate the tumor suppressive activity of WZ35...
May 16, 2018: Food & Function
Mengqin Shen, Xiaoping Zhao, Li Zhao, Liang Shi, Shuxian An, Gang Huang, Jianjun Liu
TIGAR is a p53 target gene that is known to protect cells from ROS-induced apoptosis by promoting the pentose phosphate pathway. The role of TIGAR in tumor cell invasion and metastasis remains elusive. Here we found that downregulation of TIGAR reduced the invasion and metastasis of NSCLC cells in vitro and in vivo. Immunohistochemical analysis of 72 NSCLC patients showed that TIGAR and Met protein expression was positively correlated with late stages of lung cancer. Besides, patients with high co-expression of TIGAR and Met presented a significantly worse survival...
May 12, 2018: Molecular Cancer
Sofia Mensurado, Margarida Rei, Telma Lança, Marianna Ioannou, Natacha Gonçalves-Sousa, Hiroshi Kubo, Marie Malissen, Venizelos Papayannopoulos, Karine Serre, Bruno Silva-Santos
Interleukin 17 (IL-17)-producing γδ T cells (γδ17 T cells) have been recently found to promote tumor growth and metastasis formation. How such γδ17 T-cell responses may be regulated in the tumor microenvironment remains, however, largely unknown. Here, we report that tumor-associated neutrophils can display an overt antitumor role by strongly suppressing γδ17 T cells. Tumor-associated neutrophils inhibited the proliferation of murine CD27- Vγ6+ γδ17 T cells via induction of oxidative stress, thereby preventing them from constituting the major source of pro-tumoral IL-17 in the tumor microenvironment...
May 11, 2018: PLoS Biology
Haiyan Dong, Longyu Han, Jie Wang, Jingjing Xie, Yu Gao, Fangwei Xie, Lee Jia
Circulating tumor cells (CTCs) are known as the root cause of cancer metastasis that accounts for 90% of cancer death. Owing to the rarity of blood CTCs and their microenvironmental complexity, the existing biotechnology could not precisely capture and apoptosize CTCs in vivo for cancer metastasis prevention. Here, we designed two double strand circular aptamers aimed to simultaneously target MUC1 and HER2 surface biomarkers on mesenchymal cancer cells. The circular aptamers are composed of a capture arm for binding and seizing CTCs and a circular body for resisting degradation by exonucleases...
May 7, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
Ravi P Cholia, Monisha Dhiman, Raj Kumar, Anil K Mantha
Maintaining genomic integrity is essential for cell survival and viability. Reactive oxygen species (ROS) overproduction results in oxidative stress leading to the genomic instability via generation of small base lesions in DNA and these unrepaired DNA damages lead to various cellular consequences including cancer. Recent data support the concept "oxidative stress is an indispensable participant in fostering proliferation, survival, and migration" in various cancer cell types including glioblastoma cells...
May 2, 2018: Metabolic Brain Disease
Akinori Nukui, Takahiro Narimatsu, Tsunehito Kambara, Hideyuki Abe, Setsu Sakamoto, Ken-Ichiro Yoshida, Takao Kamai
BACKGROUND: There is growing evidence that the transcription factor nuclear factor E2-related factor 2 (Nrf2) is the major participant in regulating antioxidants and pathways for detoxifying reactive oxygen species (ROS), as well as having a vital role in tumor proliferation, invasion, and chemoresistance. It was also recently reported that Nrf2 supports cell proliferation by promoting metabolic activity. Thus, Nrf2 is involved in progression of cancer. Upper urinary tract urothelial carcinoma (UTUC) is a biologically aggressive tumor with high rates of recurrence and progression, resulting in a poor prognosis...
May 2, 2018: BMC Cancer
Kyoung Ah Kang, Yea Seong Ryu, Mei Jing Piao, Kristina Shilnikova, Hee Kyoung Kang, Joo Mi Yi, Mathias Boulanger, Rosa Paolillo, Guillaume Bossis, Sung Young Yoon, Seong Bong Kim, Jin Won Hyun
The therapeutic benefits offered by 5-fluorouracil (5-FU) are limited because of the acquisition of drug resistance, the main cause of treatment failure and metastasis. The ability of the cancer cells to undergo epithelial-mesenchymal transition (EMT) contributes significantly to cancer metastatic potential and chemo-resistance. However, the underlying molecular mechanisms of 5-FU-resistance have remained elusive. Here, we show that reactive oxygen species (ROS), produced by dual oxidase 2 (DUOX2), promote 5-FU-induced EMT...
April 23, 2018: Redox Biology
Xavier Romero Ros, Louis Vermeulen
Novel immune therapeutic tools are rapidly expanding the anticancer arsenal. Despite this progress, patients with colorectal cancer (CRC) that spreads to vital parts of the body still have a dismal outcome. Transforming growth factor-β (TGF-β) plays a pivotal role in the development of CRC and metastasis. Important new work by Tauriello and colleagues has revealed that inhibition of TGF-β prevents tumor metastasis by enhancing a cytotoxic T cell response, suggesting that TGF-β inhibition is a promising pro-immunogenic therapy...
May 2018: Trends in Cancer
Gang Wang, Yifeng Li, Zeyu Yang, Weina Xu, Yifan Yang, Xiaodong Tan
To investigate the glycometabolism associated mechanism in invasion and metastasis of pancreatic cancer, We screened out genes involved in anaerobic glycolysis headed by HIF-1α,using pre-established a pair of pancreatic cancer cell lines. In this study, we further detected the glucose metabolism state not only in the cells but all also in two groups of patients with different SUVmax on 18 F-FDG PET/CT. The data suggests that ROS mediated EGFR/MEK/ERK/HIF-1α loop is activated in high glucose metabolic samples both in vitro and in vivo: The increasing of HIF-1α expression is controlled by activation of EGFR/MEK/ERK pathway in hypoxia condition, HIF-1α inhibits excessive release of ROS, the reduction of ROS further activates EGFR to form a positive feedback loop...
April 24, 2018: Biochemical and Biophysical Research Communications
Qiangsheng Hu, Yi Qin, Jinfeng Xiang, Wensheng Liu, Wenyan Xu, Qiqing Sun, Shunrong Ji, Jiang Liu, Zheng Zhang, Quanxing Ni, Jin Xu, Xianjun Yu, Bo Zhang
OBJECTIVES: Decreased deoxycytidine kinase (dCK) expression is a reported indicator of gemcitabine efficacy in pancreatic cancer, due to the impact of this kinase on gemcitabine metabolism. The transcription factor NF-E2 p45-related factor 2 (NRF2, also called Nfe2l2), a master regulator of redox homoeostasis, has been reported to tightly control the expression of numerous ROS-detoxification genes and participates in drug resistance. However, the contribution of dCK to the NRF2 signalling axis has seldom been discussed and needs investigation...
April 27, 2018: Cell Proliferation
Elodie Henriet, Margaux Sala, Aya Abou Hammoud, Adjanie Tuariihionoa, Julie Di Martino, Manon Ros, Frédéric Saltel
Discoidin domain receptors, DDR1 and DDR2, are two members of collagen receptor family that belong to tyrosine kinase receptor subgroup. Unlike other matrix receptor-like integrins, these collagen receptors have not been extensively studied. However, more and more studies are focusing on their involvement in cancer. These two receptors are present in several subcellular localizations such as intercellular junction or along type I collagen fibers. Consequently, they are involved in multiple cellular functions, for instance, cell cohesion, proliferation, adhesion, migration and invasion...
April 27, 2018: Cell Adhesion & Migration
Dan Li, Chaoqun Wang, Panfei Ma, Qingan Yu, Mingqi Gu, Liqian Dong, Wenjing Jiang, Shangha Pan, Changming Xie, Jihua Han, Yaliang Lan, Jing Sun, Ping Sheng, Kunpeng Liu, Yaohua Wu, Lianxin Liu, Yong Ma, Hongchi Jiang
PGC1α acts as a central regulator of mitochondrial metabolism, whose role in cancer progression has been highlighted but remains largely undefined. Especially, it is completely unknown about the effect of PGC1α on cholangiocarcinoma (CCA). Here we showed that PGC1α overexpression had no impact on CCA growth despite the decreased expression of PGC1α in CCA compared with adjacent normal tissue. Instead, PGC1α overexpression-promoted CCA metastasis both in vitro and in vivo. Mechanistically, for the first time, we illuminated that PGC1α reversed the Warburg effect by upregulating the expression of pyruvate dehydrogenase E1 alpha 1 subunit and mitochondrial pyruvate carrier 1 to increase pyruvate flux into the mitochondria for oxidation, whereas simultaneously promoting mitochondrial biogenesis and fusion to mediate the metabolic switch to oxidative phosphorylation...
April 27, 2018: Cell Death & Disease
Yuanyuan Ren, Xin Liu, Runqing Geng, Qunwei Lu, Rong Rao, Xi Tan, Xiangliang Yang, Wei Liu
As one of the most widely used nanomaterials, the safety of nano-TiO₂ for human beings has raised concern in recent years. Sialylation is an important glycosylation modification that plays a critical role in signal transduction, apoptosis, and tumor metastasis. The aim of this work was to investigate the cytotoxicity and phototoxicity of nano-TiO₂ with different crystalline phases for human skin keratinocytes (HaCaT cells) under ultraviolet (UV) irradiation and detect sialic acid alterations. The results showed that the mixture of crystalline P25 had the highest cytotoxicity and phototoxicity, followed by pure anatase A25, whereas pure rutile R25 had the lowest cytotoxicity and phototoxicity...
April 19, 2018: Nanomaterials
Hahyun Park, Sunwoo Park, Fuller W Bazer, Whasun Lim, Gwonhwa Song
Canine osteosarcoma is an aggressive primary bone tumor that shows metastasis to distal regions and is associated with a high mortality rate. However, the pathophysiological mechanisms of canine osteosarcoma are not well characterized. In addition, development of prognostic factors and novel therapeutic agents is necessary to efficiently treat osteosarcoma. Therefore, we studied the effects of myricetin, an antioxidant found in berries, nuts, teas, wine, and vegetables, on apoptosis and signal transduction in the canine osteosarcoma cell lines, D-17 and DSN...
April 16, 2018: Journal of Cellular Physiology
Yan Zhen Zhang, Chun Feng Wang, Lian Feng Zhang
Cucurbitacin D (CuD), isolated from plants from the Cucurbitaceae family, is a potential antitumour agent since it inhibits proliferation, migration and metastasis of cancer cells. Despite CuD antitumour activity in cancer cells, the effects of CuD on gastric cancer cell lines remain unclear. The present study aimed to investigate the effects of CuD on gastric cancer cell growth and death. Human gastric cancer cell lines (AGS, SNU1 and Hs746T) were cultured and treated with different concentrations of CuD (0, 0...
April 10, 2018: Oncology Reports
York Kamenisch, Irina Ivanova, Konstantin Drexler, Mark Berneburg
Ultraviolet (UV) radiation has a plethora of effects on human tissues. In the UV spectrum, wavelengths above 320nm fall into the UVA-range and for these it has been shown that they induce reactive oxygen species (ROS), DNA mutations and are capable to induce melanoma in mice. In addition to this it was recently shown that UVA irradiation and UVA-induced ROS also increase glucose metabolism of melanoma cells. UVA irradiation causes a persistent increase in glucose consumption, accompanied by increased glycolysis, increased lactic acid production and activation of the pentose phosphate pathway...
April 15, 2018: Experimental Dermatology
Min Seok Song, Su Min Park, Jeong Seok Park, Jin Ho Byun, Hee Jung Jin, Seung Hyun Seo, Pan Dong Ryu, So Yeong Lee
Voltage-gated potassium (Kv) channels, including Kv3.1 and Kv3.4, are known as oxygen sensors, and their function in hypoxia has been well investigated. However, the relationship between Kv channels and tumor hypoxia has yet to be investigated. This study demonstrates that Kv3.1 and Kv3.4 are tumor hypoxia-related Kv channels involved in cancer cell migration and invasion. Kv3.1 and Kv3.4 protein expression in A549 and MDA-MB-231 cells increased in a cell density-dependent manner, and the pattern was similar to the expression patterns of hypoxia-inducible factor-1α (HIF-1α) and reactive oxygen species (ROS) according to cell density, whereas Kv3...
April 2, 2018: International Journal of Molecular Sciences
Alfeu Zanotto-Filho, Subapriya Rajamanickam, Eva Loranc, Pragathi Masamsetti, Aparna Gorthi, July Carolina Romero, Sonal Tonapi, Rosangela Mayer Gonçalves, Robert L Reddick, Raymond Benavides, John Kuhn, Yidong Chen, Alexander J R Bishop
Molecular targeted compounds are emerging as a strategy to improve classical chemotherapy. Herein, we describe that using low dose of the multikinase inhibitor sorafenib improves cyclophosphamide antitumor activity by inhibiting angiogenesis, metastasis and promoting tumor healing in MDA-MB231 xenografts and the 4T1-12B syngeneic breast cancer metastasis model. Mechanistic studies in MDA-MB231 cells revealed that alkylation upregulates inflammatory genes/proteins such as COX-2, IL8, CXCL2 and MMP1 in a MEK1/2-ERK1/2-dependent manner...
March 30, 2018: Cancer Letters
Eun Mi Kim, Chan-Hun Jung, Jie-Young Song, Jong Kuk Park, Hong-Duck Um
The plasticity of solid tumors between the epithelial and mesenchymal states critically influences their malignant progression and metastasis. The epithelial-mesenchymal transition (EMT), which supports cancer cell invasion and metastasis, is promoted by pro-survival members (e.g., Bcl-2 and Bcl-XL ) of the Bcl-2 protein family, which are well-known key apoptosis regulators. We found that Bcl-w, another pro-survival member, promotes EMT by increasing respiratory complex-I activity and reactive oxygen species (ROS) levels...
March 26, 2018: Cancer Letters
Ramalingam Vaikundamoorthy, Varunkumar Krishnamoorthy, Ravikumar Vilwanathan, Rajaram Rajendran
Over a few decades, systemic chemotherapy and surgery are the only treatment options for lung cancer. Due to limited efficacy and overall poor survival of patients, it is necessary to develop a newer therapeutic strategy which specifically targets cancer cell proliferation pathway. Deciphering the role of long non-coding RNAs (lncRNAs) in tumorigenesis and pathogenesis of cancer cells has recently emerged. In the present study, marine actinomycetes derived 1-hydroxy-1-norresistomycin (HNM) was used to enhance the expression of lncRNAs through p53 transcriptional regulation and induced intrinsic apoptosis in non-small cell lung cancer cells...
March 26, 2018: Chemico-biological Interactions
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