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Cancer Letters

Qingyu Luo, Xiaowei Wu, Yiping Zhang, Tong Shu, Fang Ding, Hongyan Chen, Pengfei Zhao, Wan Chang, Xiaolin Zhu, Zhihua Liu
Multiple Drug Resistance (MDR) of ovarian cancer is a severe trouble for clinical treatment and always attributes to a bad prognosis. AT-rich interaction domain 1 A (ARID1A) has been recognized as a bona fide tumor suppressor gene in recent years, with the highest mutation rate in ovarian cancer. Previous study illustrated that ARID1A expression is negatively correlated with chemoresistance of ovarian cancer cases. However, the specific role of ARID1A in chemoresistance of ovarian cancer remains elusive. In this study, we showed that ARID1A knockdown in ovarian cancer cells significantly reduced their apoptosis rate and led to MDR, while ectopic expression of ARID1A showed opposite effects...
April 13, 2018: Cancer Letters
Yunting Jian, Meng Wang, Yan Zhang, Ruizhang Ou, Ziyuan Zhu, Yangying Ou, Xiangfu Chen, Xin Liang, Yanqing Ding, Libing Song, Xuehu Xu, Wenting Liao
Jade family PHD finger 3 (JADE3) plays a role in inducing histone acetylation during transcription, and is involved in the progression of several human cancers; however, its role in colon cancer remains unclear. Herein, we found that JADE3 was markedly upregulated in colon cancer tissues and significantly correlated with cancer progression, and predicted shorter patient survival. Further, JADE3 was expressed much higher in colon cancer cell lines that are enriched with a stem-like signature. Overexpression of JADE3 increased, while silencing JADE3 reduced cancer stem cell-like traits in colon cancer cells in vitro and in vivo...
April 13, 2018: Cancer Letters
Xiaojie Yu, Yiqiang Zhang, Xiuye Ma, Alexander Pertsemlidis
Microtubule-targeting agents (MTAs) are widely used for the treatment of non-small cell lung cancer (NSCLC). The response rate is only ∼25%, mainly attributable to drug resistance. To identify determinants of resistance in NSCLC, we performed a high-throughput screen using a library of miRNA mimics. Here we report that miR-195 synergizes with MTAs to inhibit the growth of NSCLC cells in vitro, that increased expression of miR-195 sensitizes NSCLC cells to MTAs and that repression of miR-195 confers resistance to MTAs...
April 13, 2018: Cancer Letters
Karthikeyan Subburayan, Faisal Thayyullathil, Siraj Pallichankandy, Anees Rahman, Sehamuddin Galadari
Thymoquinone (TQ), the predominant bioactive constituent present in black cumin (Nigella sativa), exerts tumor suppressive activity against a wide variety of cancer cells. Cellular senescence, characterized by stable and long term loss of proliferative capacity, acts as a potent tumor suppressive mechanism. Here, we provide evidence for the first time that TQ suppresses growth of glioma cells by potentially inducing the expression of prostate apoptosis response-4 (Par-4) tumor suppressor protein. In turn, TQ-induced Par-4 expression triggers cellular senescence, as evidenced by increasing cellular size, β-galactosidase staining, G1 phase arrest, and increased expression of senescence markers such as p53, p21, Rb, and decreased expression of lamin B1, cyclin E and cyclin depended kinase-2 (CDK-2)...
April 12, 2018: Cancer Letters
Yuhang Zhou, Tingting Huang, Jinglin Zhang, Alfred S L Cheng, Jun Yu, Wei Kang, Ka Fai To
Initially identified as a cell and organ size controller, Hippo pathway turns into a hotspot for researchers. Within recent years, more and more mechanisms about Hippo pathway were uncovered. Even though Hippo signaling has been revealed to exert controversial roles according to different cell context and microenvironment, which is because of its diversified interplays with a great variety of signaling transduction cascades; mechanisms other than size-limitation, however, remain to be elucidated. Recently, a growing number of studies tend to put Hippo on inflammatory and immunological focus: its antimicrobial role in flies, its pro- or anti-inflammation in mammals, as well as its relevance to cancerous immunity...
April 11, 2018: Cancer Letters
Ángeles Rodríguez-Martínez, María Torres-Durán, Juan M Barros-Dios, Alberto Ruano-Ravina
Residential radon exposure is considered the second cause of lung cancer and the first in never smokers. Nevertheless, the association between the different histological types of lung cancer and radon is not completely clear, and radon effect on small cell lung cancer is not completely understood. We aim to asses the effect of residential radon exposure on the risk of small cell lung cancer (SCLC) in general population and miners through a systematic review applying predefined inclusion and exclusion criteria...
April 11, 2018: Cancer Letters
Jiagui Song, Tianzhuo Wang, Weizhi Xu, Peng Wang, Junhu Wan, Yunling Wang, Jun Zhan, Zhang Hongquan
We previously reported that HOXB9 is overexpressed in colon cancer and predicts a favourable patient outcome, which is opposite to the tumour-promoting role of HOXB9 in other cancers. We hypothesized that HOXB9 acetylation may account for its inhibitory role in colon cancer. We aim to examine the role of acetylated HOXB9 in colon cancer cells and patients. The AcK27-HOXB9 levels in colon cancer cells and patients were analysed by Western blot analysis and immunohistochemistry separately. Correlation between AcK27-HOXB9 expression and patient survival was assessed by Kaplan-Meier analysis...
April 11, 2018: Cancer Letters
Xiang Zhang, Xiao Zhang, Ting Wang, Lei Wang, Zhijun Tan, Wei Wei, Bo Yan, Jing Zhao, Kaichun Wu, Angang Yang, Rui Zhang, Lintao Jia
Overexpressed c-Myc and EZH2 usually mean high malignancy in cancers. Most of mortality from cancer is attributable to metastasis. MicroRNAs(miRNAs), like transcription factors, can regulate hundreds of genes. Here, we identify microRNA-26a (miR-26a) suppresses EZH2 and c-Myc by targeting EZH2 and CDK8 in Wnt pathway. MiR-26a is a well-known tumor-suppressive miRNA in multiple cancers, but how it is downregulated in hepatocellular carcinoma (HCC) is still unclear. Here, we disclose miR-26a is epigenetic silenced by a c-Myc-mediated PRC2-depandent way in HCC...
April 10, 2018: Cancer Letters
Lauren MacDonagh, Steven G Gray, Eamon Breen, Sinead Cuffe, Stephen P Finn, Kenneth J O'Byrne, Martin P Barr
Non-small cell lung cancer (NSCLC) is the most common cause of cancer-related deaths worldwide. While partial or complete tumor regression can be achieved in patients, particularly with cisplatin-based strategies, these initial responses are frequently short-lived and are followed by tumor relapse and chemoresistance. Identifying the root of cisplatin resistance in NSCLC and elucidating the mechanism(s) of tumor relapse, is of critical importance in order to determine the point of therapeutic failure, which in turn, will aid the discovery of novel therapeutics, new combination strategies and a strategy to enhance the efficacy of current chemotherapeutics...
April 10, 2018: Cancer Letters
Wei Hu, Zhuo-Yue Bi, Zhen-Long Chen, Cong Liu, Lin-Lin Li, Feng Zhang, Qun Zhou, Wei Zhu, Yang-Yi-Yan Song, Bo-Tao Zhan, Qian Zhang, Yong-Yi Bi, Cheng-Cao Sun, De-Jia Li
Lung cancer, the leading cause of cancer deaths worldwide, is characterized with malignant cell growth. Advances in next-generation sequencing has helped us further understand RNA and identify novel circular RNAs (circRNAs) that may be useful in the early diagnosis and treatment of lung cancer. Similar to other noncoding RNAs, circRNAs present diverse biological functions in normal and disease states, including various types of cancers. This review focuses mainly on the poorly understood functions of circRNA in lung cancer...
April 10, 2018: Cancer Letters
Meixiang Sang, Lingjiao Meng, Yang Sang, Shina Liu, Pingan Ding, Yingchao Ju, Fei Liu, Lina Gu, Yishui Lian, Juan Li, Yunyan Wu, Xiaochong Zhang, Baoen Shan
As the most well-known circular RNA, ciRS-7 (also termed CDR1as) has been reported to act as a miR-7 sponge, resulting in reduced miR-7 activity and increased miR-7-targeted transcripts. Here, we showed that ciRS-7 is up-regulated in esophageal squamous cell carcinoma (ESCC), and is associated with the poor clinicopathological parameters of ESCC patients. Moreover, over-expression of ciRS-7 increased the proliferation, migration and invasion of ESCC cells. Mechanistic studies revealed that ciRS-7 contains nineteen miR-876-5p binding sites and acts as a miR-876-5p sponge...
April 7, 2018: Cancer Letters
An-Chen Chang, Po-Chun Chen, Yu-Feng Lin, Chen-Ming Su, Ju-Fang Liu, Tien-Huang Lin, Show-Mei Chuang, Chih-Hsin Tang
Bone metastasis is a frequent occurrence in prostate cancer (PCa) that is associated with severe complications such as fracture, bone pain and hypercalcemia. The cross-talk between metastatic cancer cells and bone is critical to the development and progression of bone metastases. In our previous data, we have described how the involvement of the Wnt-induced secreted protein-1/vascular cell adhesion molecule-1 (WISP-1/VCAM-1) system in this tumor-bone interaction contributes to human PCa cell motility. In this study, we found that WISP-1 regulates bone mineralization by inducing bone morphogenetic protein-2 (BMP2), BMP4 and osteopontin (OPN) expression in osteoblasts...
April 5, 2018: Cancer Letters
Yefeng Yin, Li Liu, Zhefu Zhao, Libo Yin, Nathalie Bauer, Clifford C Nwaeburu, Jury Gladkich, Wolfgang Gross, Thilo Hackert, Carsten Sticht, Norbert Gretz, Oliver Strobel, Ingrid Herr
Pancreatic ductal adenocarcinoma (PDA) has poor therapeutic options. Recent patient studies indicate that cholesterol-lowering statins have anti-tumor capacities. We examined several established and primary PDA and normal cell lines as well as PDA patient tissues (n = 68). We found that simvastatin inhibited viability, stemness, tumor growth and metastasis and that it enhanced the efficacy of gemcitabine. These changes were associated with modulation of Shh-related gene expression. Overexpression of Shh prevented the anti-cancer effect of simvastatin, and inhibition of Shh mimicked the simvastatin effect...
April 5, 2018: Cancer Letters
Diane Ojo, Xiaozeng Lin, Ying Wu, Jessica Cockburn, Anita Bane, Damu Tang
We report that BMI1 promotes tamoxifen resistance in estrogen receptor (ER)-positive breast cancer (BC). BMI1 overexpression conferred MCF7 and TD47 cells resistance to tamoxifen; BMI1 knockdown sensitized the process. In MCF7-derived tamoxifen resistant cells, BMI1 expression was upregulated and BMI1 knockdown reduced the resistance. BMI1 is an oncogene; its oncogenic activity is attributed to BMI1-stimulated E3 ubiquitin ligase activity, a process that requires BMI1's ring finger (RF) domain. However, a BMI1 mutant without RF conferred tamoxifen resistance...
April 4, 2018: Cancer Letters
Ruoyu Zhou, Yuwei Wu, Wenxi Wang, Wenjia Su, Yicong Liu, Yumin Wang, Chunmei Fan, Xiaoling Li, Guiyuan Li, Yong Li, Wei Xiong, Zhaoyang Zeng
No abstract text is available yet for this article.
April 3, 2018: Cancer Letters
Shuai Jiang
No abstract text is available yet for this article.
April 3, 2018: Cancer Letters
Bin Lu, Zongqi Wang, Ye Ding, Xuanzhong Wang, Shan Lu, Chongcheng Wang, Chuan He, Meihua Piao, Guangfan Chi, Yinan Luo, Pengfei Ge
RIP1 and RIP3 are necroptosis initiators, but their roles in regulation of glycolysis remain elusive. In this study, we found shikonin activated RIP1 and RIP3 in glioma cells in vitro and in vivo, which was accompanied with glycolysis suppression. Further investigation revealed that shikonin-induced decreases of glucose-6-phosphate and pyruvate and downregulation of HK II and PKM2 were significantly prevented when RIP1 or RIP3 was pharmacologically inhibited or genetically knocked down with SiRNA. Moreover, shikonin also triggered accumulation of intracellular H2 O2 and depletion of GSH and cysteine...
March 30, 2018: Cancer Letters
Haisen Yin, Risheng Que, Chunying Liu, Weidan Ji, Bin Sun, Xuejing Lin, Qin Zhang, Xinying Zhao, Zhangxiao Peng, Xiaofeng Zhang, Haihua Qian, Lei Chen, Yonggang Yao, Changqing Su
Hepatocellular carcinoma (HCC) is the second leading cause of cancer related death which needs novel drugs to improve patient outcome. Survivin overexpresses in HCC and contributes to HCC malignant progression. In this study, we established a Survivin-targeted drug screening platform, a cell model HepG2-Sur5P-EGFP-Sur3U stably transfected with lentivirus carrying an EGFP expression cassette, in which the EGFP expression was regulated by the upstream Survivin promoter and downstream Survivin 3'-UTR. By using this platform, we screened and easily identified one of matrine derivatives, WM-127, from hundreds of matrine derivatives...
March 30, 2018: Cancer Letters
Wan-Ting Liu, Yang Wang, Jing Zhang, Fei Ye, Xiao-Hui Huang, Bin Li, Qing-Yu He
Lung adenocarcinoma (LAC) is the most lethal cancer and the leading cause of cancer-related death worldwide. The identification of meaningful clusters of co-expressed genes or representative biomarkers may help improve the accuracy of LAC diagnoses. Public databases, such as the Gene Expression Omnibus (GEO), provide rich resources of valuable information for clinics, however, the integration of multiple microarray datasets from various platforms and institutes remained a challenge. To determine potential indicators of LAC, we performed genome-wide relative significance (GWRS), genome-wide global significance (GWGS) and support vector machine (SVM) analyses progressively to identify robust gene biomarker signatures from 5 different microarray datasets that included 330 samples...
March 30, 2018: Cancer Letters
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
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