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https://www.readbyqxmd.com/read/29050315/the-activation-of-src-family-kinases-and-focal-adhesion-kinase-with-the-loss-of-the-amplified-mutated-egfr-gene-contributes-to-the-resistance-to-afatinib-erlotinib-and-osimertinib-in-human-lung-cancer-cells
#1
Yuichi Murakami, Kahori Sonoda, Hideyuki Abe, Kosuke Watari, Daiki Kusakabe, Koichi Azuma, Akihiko Kawahara, Jun Akiba, Chitose Oneyama, Jonathan A Pachter, Kazuko Sakai, Kazuto Nishio, Michihiko Kuwano, Mayumi Ono
Second- and third-generation inhibitors of epidermal growth factor receptor (EGFR) tyrosine kinase activity (EGFR-TKIs) are improving the treatment of patients with non-small cell lung cancer. Here we established two sublines (BR1-8 and BR2-3) resistant to a second-generation inhibitor, afatinib, from the human lung cancer cell line HCC827 that harbors a mutation that activates the tyrosine kinase activity of EGFR. These afatinib-resistant sublines were resistant to first-generation EGFR-TKIs, gefitinib and erlotinib, and a third-generation EGFR-TKI, osimertinib...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050308/the-lncrna-hoxa11-as-functions-as-a-competing-endogenous-rna-to-regulate-padi2-expression-by-sponging-mir-125a-5p-in-liver-metastasis-of-colorectal-cancer
#2
Dong Chen, Qiang Sun, Lufei Zhang, Xiaohu Zhou, Xiaofei Cheng, Dongkai Zhou, Feng Ye, Jianjiang Lin, Weilin Wang
Several long non-coding RNAs (lncRNAs) play important roles in the regulation of liver metastasis in colorectal cancer (CRC) patients. We previously described the potential involvement of HOMEOBOX A11 (HOXA11) antisense RNA (HOXA11-AS), miR-125a-5p, and peptidyl arginine deiminase 2 (PADI2) in promoting liver metastasis in CRC patients. In the present study, we verified the significant upregulation of HOXA11-AS and PADI2, as well as the downregulation of miR-125a-5p, in CRC patients with liver metastasis. Overexpression and knockdown studies of HOXA11-AS or PADI2, as well as gain-/loss-of-function studies of miR-125a-5p, revealed a positive correlation between HOXA11-AS and PADI2 and a negative correlation with miR-125a-5p in the regulation of liver metastasis in CRC cell lines...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050307/lncshrg-promotes-hepatocellular-carcinoma-progression-by-activating-hes6
#3
Ying-Chen Xu, Chao-Jie Liang, Dong-Xin Zhang, Guan-Qun Li, Xia Gao, Jian-Zhu Fu, Feng Xia, Jia-Jun Ji, Li-Jun Zhang, Guang-Ming Li, Ji-Xiang Wu
Hepatocellular carcinoma, one of the most common cancers, leads to mass mortality worldwide currently. However, the underlying mechanism of its oncogenesis remains to be elucidated. Here we identified that a long noncoding RNA, lncSHRG, was greatly upregulated in human hepatocellular carcinoma samples. We found that lncSHRG was essential for liver cancer cell proliferation and tumor propagation in mice. In mechanism, lncSHRG recruits SATB1 to bind to HES6 promoter and initiates HES6 expression. HES6, which is highly expressed in hepatocellular carcinoma, promotes tumor cell proliferation...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050306/the-hyaluronan-mediated-motility-receptor-rhamm-promotes-growth-invasiveness-and-dissemination-of-colorectal-cancer
#4
Valentina Mele, Lena Sokol, Viktor Hendrik Kölzer, Dennis Pfaff, Manuele Giuseppe Muraro, Irene Keller, Zahnd Stefan, Irene Centeno, Luigi Maria Terracciano, Heather Dawson, Inti Zlobec, Giandomenica Iezzi, Alessandro Lugli
In colorectal cancer (CRC), RHAMM is an independent adverse prognostic factor. The aim of the study was therefore to investigate on the role of RHAMM as a potential direct driver of cell proliferation and migration in CRC cell lines and to identify pathways dependent on RHAMM in human CRC. Proliferation, cell cycle alterations and invasive capacity were tested in two RHAMM- and control- knockdown CRC cell lines by flow cytometry and in vitro assays. Tumorigenicity and metastasis formation was assessed in immunodeficient mice...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050299/exostosin-1-regulates-cancer-cell-stemness-in-doxorubicin-resistant-breast-cancer-cells
#5
Sarala Manandhar, Chang-Gu Kim, Sun-Hee Lee, Soo Hyun Kang, Nikita Basnet, You Mie Lee
Cancer stem cells (CSCs) are associated with cancer recurrence following radio/chemotherapy owing to their high resistance to therapeutic intervention. In this study, we investigated the role of exostoxin 1 (EXT1), an endoplasmic reticulum (ER)-residing type II transmembrane glycoprotein, in cancer cell stemness. DNA microarray analysis revealed that doxorubicin-resistant MCF7/ADR cells have high levels of EXT1 expression compared to its parental cell line, MCF7. These cells showed significantly higher populations of CSCs and larger populations of aldehyde dehydrogenase (ALDH(+)) and CD44(+)/CD24(-)cells, as compared to MCF7 cells...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050269/long-non-coding-rna-carlo-5-promotes-tumor-progression-in-hepatocellular-carcinoma-via-suppressing-mir-200b-expression
#6
Chunqing Dou, Liyuan Sun, Xin Jin, Mingming Han, Bao Zhang, Xian Jiang, Jinyong Lv, Tao Li
Long non-coding RNAs (lncRNAs) play key roles in cancer initiation and progression. The aim was to investigate the biological functions and clinical significance of long non-coding RNA CARLo-5 in hepatocellular carcinoma (HCC). QRT-PCR was performed to investigate CARLo-5 expression in HCC tissues and cells. Kaplan-Meier curve and multivariate analysis validated the association between CARLo-5 expression and overall survival (OS) in HCC patients. Cell proliferation and invasion was performed by CCK8 cell proliferation, cell colony formation and transwell invasion assays...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050264/the-microrna-expression-signature-of-pancreatic-ductal-adenocarcinoma-by-rna-sequencing-anti-tumour-functions-of-the-microrna-216-cluster
#7
Keiichi Yonemori, Naohiko Seki, Tetsuya Idichi, Hiroshi Kurahara, Yusaku Osako, Keiichi Koshizuka, Takayuki Arai, Atsushi Okato, Yoshiaki Kita, Takaaki Arigami, Yuko Mataki, Yuko Kijima, Kosei Maemura, Shoji Natsugoe
We analysed the RNA sequence-based microRNA (miRNA) signature of pancreatic ductal adenocarcinoma (PDAC). Aberrantly expressed miRNAs were successfully identified in this signature. Using the PDAC signature, we focused on 4 clustered miRNAs, miR-216a-5p, miR-216a-3p, miR-216b-5p and miR-216b-3p on human chromosome 2p16.1. All members of the miR-216 cluster were significantly reduced in PDAC specimens. Ectopic expression of these miRNAs suppressed cancer cell aggressiveness, suggesting miR-216 cluster as anti-tumour miRNAs in PDAC cells...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050263/the-prognostic-value-of-osteopontin-in-limited-stage-small-cell-lung-cancer-patients-and-its-mechanism
#8
Fanglei Liu, Chunxue Bai, Zhongliang Guo
Osteopontin (OPN) is known to be overexpressed in numerous carcinomas. Although abundant OPN has been reported to be correlated with poor survival in non-small cell lung cancer (NSCLC) but their clinical and prognostic significance in SCLC remains unknown. In this study, RNA-sequencing was used to obtain gene expression data in SCLC tissue samples and OPN expression levels were then investigated using qPCR, immunohistochemical and Western blot. We found OPN was one of the most upregulated genes. Besides, the correlation of OPN with tumor clinicopathological characteristics was evaluated and we found OPN was associated with advanced tumor stages...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050257/linc-ror-induces-epithelial-to-mesenchymal-transition-in-ovarian-cancer-by-increasing-wnt-%C3%AE-catenin-signaling
#9
Yanhui Lou, Huanhuan Jiang, Zhumei Cui, Lingzhi Wang, Xiangyu Wang, Tian Tian
Long intergenic non-protein coding RNA, regulator of reprogramming (linc-ROR) is an intergenic long non-coding RNA (lncRNA) previously shown to contribute to tumorigenesis in several malignancies. However, little is known about whether linc-ROR has a role in ovarian cancer progression. In this study, we found that linc-ROR expression was increased in high-grade ovarian serous cancer tissues compared with normal ovarian tissues or normal fallopian tube tissues. Furthermore, the level of linc-ROR expression was associated with ovarian cancer International Federation of Gynecology and Obstetrics stage and lymph node metastasis...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050246/nrf2-regulated-metabolic-gene-signature-as-a-prognostic-biomarker-in-non-small-cell-lung-cancer
#10
Akhileshwar Namani, Qin Qin Cui, Yihe Wu, Hongyan Wang, Xiu Jun Wang, Xiuwen Tang
Mutations in Kelch-like ECH-associated protein 1 (KEAP1) cause the aberrant activation of nuclear factor erythroid-derived 2-like 2 (NRF2), which leads to oncogenesis and drug resistance in lung cancer cells. Our study was designed to identify the genes involved in lung cancer progression targeted by NRF2. A series of microarray experiments in normal and cancer cells, as well as in animal models, have revealed regulatory genes downstream of NRF2 that are involved in wide variety of pathways. Specifically, we carried out individual and combinatorial microarray analysis of KEAP1 overexpression and NRF2 siRNA-knockdown in a KEAP1 mutant-A549 non-small cell lung cancer (NSCLC) cell line...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050230/a-potential-panel-of-two-long-non-coding-rna-signature-to-predict-recurrence-of-patients-with-laryngeal-cancer
#11
Zhigang Bai, Enhong Shi, Qiwei Wang, Zhouwei Dong, Ping Xu
Accumulating evidence has shown that aberrant lncRNA expression plays an oncogenic or tumor-suppressive role in the tumorigenesis of laryngeal cancer. However, the prognostic roles of lncRNAs in laryngeal cancer recurrence are still poorly understood. In this study, we obtained lncRNA expression profiles of 109 patients with laryngeal cancer by mining previously published gene expression microarray data from the Gene Expression Omnibus (GEO) and identified two lncRNAs associated with laryngeal cancer recurrence in the training dataset by using Cox regression analysis...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050223/mir-23a-promotes-tgf-%C3%AE-1-induced-emt-and-tumor-metastasis-in-breast-cancer-cells-by-directly-targeting-cdh1-and-activating-wnt-%C3%AE-catenin-signaling
#12
Fei Ma, Wenjie Li, Chunxiao Liu, Wei Li, Haining Yu, Bo Lei, Yanlv Ren, Zhigao Li, Da Pang, Cheng Qian
TGF-β1-induced epithelial-mesenchymal transition (EMT) has been proved to be associated with metastasis of breast cancer cells. We attempted to detect a novel mechanism that microRNAs mediated the TGF-β1-induced EMT in the process of breast cancer metastasis. Here we reported that the expression of miR-23a was higher in breast cancer cells with high metastasis ability and patients with lymph node metastasis and the treatment of TGF-β1 significantly upregulated the expression of miR-23a in breast cancer cells...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29049167/decreased-expression-of-rassf10-correlates-with-poor-prognosis-in-patients-with-colorectal-cancer
#13
Junxun Ma, Sujie Zhang, Yi Hu, Xiaoyan Li, Fang Yuan, Danyang Sun, Lijie Wang, Fan Zhang, Guangying Chen, Pengfei Cui
Ras association domain protein 10 (RASSF10) was reported to act as a prognostic indicator in various types of cancer and it was proved to be tumor suppressor gene in colorectal cancer (CRC). The purpose of this study was to evaluate the prognostic significance of RASSF10 in CRC.Quantitative real-time polymerase chain reaction was used to detect the messenger RNA (mRNA) expression while enzyme-linked immunosorbent assay was taken to measure the protein expression of RASSF10 in tumor tissues and adjacent normal tissues from 102 patients with CRC...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29048676/decreased-expression-of-the-augmenter-of-liver-regeneration-results-in-growth-inhibition-and-increased-chemosensitivity-of-acute-t-lymphoblastic-leukemia-cells
#14
Yan Shen, Qi Liu, Shifeng Lou, Yun Luo, Hang Sun, Hanqing Zeng, Jianchuan Deng
Augmenter of liver regeneration (ALR) plays crucial roles in cell survival and growth. Previous studies have demonstrated that ALR exerts a protective effect on toxic agent‑induced cell death in acute T lymphoblastic leukemia cells and ALR knockdown can sensitize cancer cells to radiation. However, the biological functions of ALR against drug resistance in T-cell acute lymphoblastic leukemia are mostly unknown. In the present study, we investigated the effect of small interfering RNA (siRNA)-induced ALR silencing on cell proliferation and sensitivity to vincristine (VCR) of Jurkat cells...
September 21, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29048670/suppression-of-tumor-derived-semaphorin%C3%A2-7a-and-genetic-ablation-of-host-derived-semaphorin%C3%A2-7a-impairs-tumor-progression-in-a-murine-model-of-advanced-breast-carcinoma
#15
R Garcia-Areas, S Libreros, M Simoes, C Castro-Silva, N Gazaniga, S Amat, J Jaczewska, P Keating, K Schilling, M Brito, E P Wojcikiewicz, V Iragavarpu-Charyulu
Solid tumors can generate a plethora of neurogenesis-related molecules that enhance their growth and metastasis. Among them, we have identified axonal guidance molecule Semaphorin 7A (SEMA7A) in breast cancer. The goal of this study was to determine the therapeutic effect of suppressing SEMA7A levels in the 4T1 murine model of advanced breast carcinoma. We used anti-SEMA7A short hairpin RNA (shRNA) to gene silence SEMA7A in 4T1 mammary tumor cells. When implanted into the mammary fat pads of syngeneic mice, SEMA7A shRNA-expressing 4T1 tumors exhibited decreased growth rates, deferred metastasis and reduced mortality...
October 3, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29048663/suppression-of-letm1-by-sirna-inhibits-cell-proliferation-and-invasion-of-bladder-cancer-cells
#16
Bisheng Huang, Jingwei Zhang, Xiaolu Zhang, Chi Huang, Guanghui Hu, Saiyang Li, Tiancheng Xie, Mengnan Liu, Yunfei Xu
The leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) is highly expressed in many human malignancies and is correlated with poor prognosis. However, the function of LETM1 in bladder cancer still remains unknown. In the present study, we analyzed the expression levels of LETM1 in bladder cancer tissues and non-cancerous tissues as well as in four bladder cancer cell lines (T24, EJ, 5637 and J82) and a human bladder epithelial immortalized cell line SV-HUC-1. Small interfering RNA (siRNA) was employed to knockdown the expression of LETM1 in the T24 cells...
September 18, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29048648/long-non-coding-rna-xist-regulates-pdcd4-expression-by-interacting-with-mir-21-5p-and-inhibits-osteosarcoma-cell-growth-and-metastasis
#17
Rui Zhang, Tian Xia
lncRNA-X-inactive specific transcript (lncRNA XIST) has been demonstrated to be a tumor suppressor involved in the pathogenesis and development of various cancers. However, the function of XIST and its working mechanism in osteosarcoma (OS) remain enigmatic. Firstly, we determined the expression of XIST in OS tissues and cell lines by quantitative reverse transcription-PCR (qRT-PCR) and explored whether aberrant XIST expression was associated with recurrence and short overall survival. Furthermore, the effects of XIST on osteosarcoma cells were studied by lentivirus mediated overexpression approach in vitro and in vivo...
September 19, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29048642/the-epigenetic-effect-of-microrna-in-bcr-abl1%C3%A2-positive-microvesicles-during-the-transformation-of-normal-hematopoietic-transplants
#18
Na Shen, Lin Jiang, Qing Li, Jieke Cui, Shu Zhou, Fanjun Cheng, Zhaodong Zhong, Li Meng, Yong You, Xiaojian Zhu, Ping Zou
Epigenetics have been demonstrated to play a pivotal role in the progression of multiple cancers. Our previous study has demonstrated that microvesicles (MVs) derived from K562 cells could malignantly transform normal hematopoietic cells. The aim of this section was to elucidate the epigenetic effects of RNA in K562-MVs. We altered some epigenetic RNAs (miR-106a-5p, miR-106b-5p and lincPOU3F3) in K562-MVs and followed the process of transformation. Global DNA methylation and DNA methyltransferase (DNMT) levels were observed respectively...
September 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29048636/genome-wide-study-of-er-regulated-lncrnas-shows-ap000439-3-may-function-as-a-key-regulator-of-cell-cycle-in-breast-cancer
#19
Yin Zhang, Dan-Lan Wang, Hai-Yan Yan, Jian-You Liao, Jie-Hua He, Kai-Shun Hu, Wei-Xi Deng, Yan-Jie Wang, Hong-Tao Xing, H Phillip Koeffler, Dong Yin
Estrogen receptor (ER) plays important roles in cell growth, development and tumorigenesis. Although ER-regulated genes have been extensively investigated, little is known about roles of ER-regulated lncRNAs in breast cancer. Here, we conducted genome-wide study of ER-regulated lncRNAs by using RNA-seq, ChIP-seq and TCGA data. A total of identified 114 ER-regulated lncRNAs were identified, many of them were overexpressed in ER+ breast cancer and co-expressed with some key regulators. Silencing one of most prominent lncRNA, AP000439...
September 20, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29048627/slc7a11-a-component-of-cysteine-glutamate-transporter-is-a-novel-biomarker-for-the-diagnosis-and-prognosis-in-laryngeal-squamous-cell-carcinoma
#20
Zhihong Ma, Hong Zhang, Meng Lian, Changli Yue, Gehong Dong, Yulan Jin, Rui Li, Hongfei Wan, Ru Wang, Ying Wang, Jie Zhai, Hongzhi Ma, Ling Feng, Jianfeng Han, Shuzhou Liu, Youxin Guo, Jianhua Li, Yu Liu, Jugao Fang, Honggang Liu
Solute carrier family 7, membrane 11 (SLC7A11) or (xCT) is a component of the cysteine-glutamate transporter, which plays a critical role in glutathione homeostasis which is important to protect cells from oxidative stress. SLC7A11 is distributed in various tissues and participates in the occurrence of a number of diseases, particularly in the pathogenesis of malignant tumors, but its role in laryngeal cancer development has not yet been clearly defined. The objective of the present study was to investigate the role of SLC7A11 in laryngeal squamous cell carcinoma (LSCC)...
September 20, 2017: Oncology Reports
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