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Oncology Letters

Kehui Tong, Chang Xin, Wenzhong Chen
The present study was designed to investigate the antiproliferative activity of isoimperatorin against SGC-7901 cells and to examine the possible mechanisms. The antiproliferative activity of isoimperatorin against SGC-7901 cells was evaluated using an MTT assay, and the mechanisms were investigated using flow cytometry and western blot assays, which were used to determine the apoptotic rate and expression levels of mitochondria-mediated apoptosis-associated proteins, including Survivin, myeloid leukemia cell-1 (Mcl-1), B cell lymphoma-extra large (Bcl-xl), B cell lymphoma 2 (Bcl-2), second mitochondria-derived activator of caspase (Smac), Bcl-2-associated X factor (Bax), cleaved (c)-caspase-3 and c-caspase-9 in SGC-7901 cells...
January 2017: Oncology Letters
Lixiang Meng, Geliang Xu, Jiansheng Li, Wenbin Liu, Weidong Jia, Jinliang Ma, Decheng Wei
Bovine lactoferricin P13 (LfcinB-P13) is a peptide derived from LfcinB. In the present study, the effect of LfcinB-P13 on the human liver cancer cell line SMMC7721 was investigated in vitro and in vivo. The results of the present study indicate that LfcinB-P13 significantly decreased SMMC7721 cell viability in vitro (P=0.032 vs. untreated cells), while exhibiting low cytotoxicity in the wild-type liver cell line L02. In addition, the rate of apoptosis in SMMC7721 cells was significantly increased following treatment with 40 and 60 µg/ml LfcinB-P13 (P=0...
January 2017: Oncology Letters
Joanna Pancewicz-Wojtkiewicz, Andrzej Eljaszewicz, Oksana Kowalczuk, Wieslawa Niklinska, Radoslaw Charkiewicz, Miroslaw Kozłowski, Agnieszka Miasko, Marcin Moniuszko
The Notch signaling pathway is deregulated in numerous solid types of cancer including non-small cell lung cancer (NSCLC). However, the profile of Notch ligand expression remains unclear. Therefore, the present study aimed to determine the profile of Notch ligands in NSCLC patients and to investigate whether quantitative assessment of Notch ligand expression may have prognostic significance in NSCLC patients. The study was performed in 61 pairs of tumor and matched unaffected lung tissue specimens obtained from patients with various stages of NSCLC, which were analyzed by reverse transcription-polymerase chain reaction...
January 2017: Oncology Letters
Amina Kariminia, Sabine M Ivison, Vivian M Leung, Susanna Sung, Nicole Couto, Jacob Rozmus, Nina Rolf, Aru Narendran, Sandra E Dunn, Gregor S D Reid, Kirk R Schultz
Y-box-binding protein 1 (YB-1) is a regulatory protein that is associated with drug resistance and relapse in solid tumors. As YB-1 mediates some of its activity through growth factor receptor signaling dysregulation, the present study compared the expression of YB-1 and interleukin 7 (IL-7) receptor α (IL-7Rα) in pediatric B-cell precursor (BCP) acute lymphoblastic leukemia (ALL) and normal BCP cells. The expression levels of IL-7Rα and YB-1 were higher in relapsed vs. diagnostic samples of primary BCP ALL; however, co-expression was also observed in a minor BCP cell population in samples from healthy donors...
January 2017: Oncology Letters
Luciana Marques Paula, Luis Henrique Ferreira De Moraes, Abaeté Leite Do Canto, Laurita Dos Santos, Airton Abrahão Martin, Silvia Regina Rogatto, Renata De Azevedo Canevari
Nodal status is the most significant independent prognostic factor in breast cancer. Identification of molecular markers would allow stratification of patients who require surgical assessment of lymph nodes from the large numbers of patients for whom this surgical procedure is unnecessary, thus leading to a more accurate prognosis. However, up to now, the reported studies are preliminary and controversial, and although hundreds of markers have been assessed, few of them have been used in clinical practice for treatment or prognosis in breast cancer...
January 2017: Oncology Letters
Zhaoyang Li, Ning Wang, Changxin Huang, Yanhong Bao, Yiqian Jiang, Guiting Zhu
Colorectal cancer is the third most common type of cancer in men and women. Chemotherapy is an important treatment strategy for patients with terminal stage cancer. However, the development of drug resistance hampers the effectiveness of chemotherapy. Therefore, an effective therapeutic approach to target chemoresistance-associated cellular molecules is required. In the present study, drug-resistant human colorectal cancer HCT116 cells were developed by treating HCT116 cells with increasing concentrations of 5-fluorouracil (5-FU)...
January 2017: Oncology Letters
Annika Gustafsson Asting, Britt-Marie Iresjö, Camilla Nilsberth, Ulrika Smedh, Kent Lundholm
Prostaglandin E2 (PGE2) is elevated in a variety of malignant tumors and has been shown to affect several hallmarks of cancer. Accordingly, the PGE2 receptor, E-prostanoid 2 (EP2), has been reported to be associated with patient survival and reduced tumor growth in EP2-knockout mice. Thus, the aim of the present study was to screen for major gene expression alterations in tumor tissue growing in EP2-knockout mice. EP2-knockout mice were bred and implanted with EP2 receptor-expressing and PGE2-producing epithelial-like tumors...
January 2017: Oncology Letters
Hao Geng, Li Zhao, Zhaofeng Liang, Zhiqiang Zhang, Dongdong Xie, Liangkuan Bi, Yi Wang, Tao Zhang, Lei Cheng, Dexin Yu, Caiyun Zhong
Bladder cancer (BC) is universally acknowledged as a significant public health issue, worldwide. Numerous studies have demonstrated that cigarette smoke is the primary risk factor for BC. However, the mechanism of cigarette smoke-induced BC has not been fully elucidated. Sustained epithelial cell hyperplasia has been identified as a preneoplastic lesion during the formation of BC. The aim of the present study was to investigate whether exposure to cigarette smoke extract (CSE) induced proliferation in normal human urothelial SV-HUC-1 cells...
January 2017: Oncology Letters
Hai-Ping Zhang, Jian Zou, Zhuo-Qun Xu, Jun Ruan, Shu-Dong Yang, Ying Yin, Hui-Jun Mu
Although an association between obesity and the occurrence of renal cell carcinoma (RCC) has been identified, the mechanism by which obesity functions to increase this risk of cancer remains unclear. Leptin, visfatin, apelin, resistin and adiponectin are peptide hormones secreted by adipocytes; it is considered that these may affect RCC development by exerting effects on proliferation, cell growth and inflammation. The aim of the present study was to investigate the association between the aforementioned adipokine genes and clear cell RCC (CC-RCC)...
January 2017: Oncology Letters
Hai-Zhao Zhao, Ming Jia, Ze-Bin Luo, Xiao-Jun Xu, Si-Si Li, Jing-Ying Zhang, Xiao-Ping Guo, Yong-Min Tang
The ETS-related gene (ERG) has been demonstrated to be associated with overall survival in cytogenetically normal acute myeloid leukemia and acute T cell-lymphoblastic leukemia (T-ALL) in adult patients. However, there are no data available regarding the impact of ERG expression on childhood ALL. In the present study, ERG expression levels were analyzed in bone marrow samples from 119 ALL pediatric patients. ALL patients demonstrated higher ERG expression compared with the controls (P<0.0001). In addition, low ERG expression identified a group of patients with higher white blood cell counts (P=0...
January 2017: Oncology Letters
Irma M Puspitasari, Chiho Yamazaki, Rizky Abdulah, Mirasari Putri, Satomi Kameo, Takashi Nakano, Hiroshi Koyama
The administration of radioprotective compounds is one approach to preventing radiation damage in non-cancerous tissues. Therefore, radioprotective compounds are crucial in clinical radiotherapy. Selenium is a radioprotective compound that has been used in previous clinical studies of radiotherapy. However, evidence regarding the effectiveness of selenium in radiotherapy and the mechanisms underlying the selenium-induced reduction of the side effects of radiotherapy remains insufficient. To further investigate the effectiveness of selenium in radiotherapy, the present study examined the protective effects of sodium selenite supplementation administered prior to X-ray radiation treatment in CHEK-1 non-cancerous human esophageal cells...
January 2017: Oncology Letters
Barbara Tomasello, Giuseppe Antonio Malfa, Angela Strazzanti, Santi Gangi, Claudia Di Giacomo, Francesco Basile, Marcella Renis
Physical activity offers a paradoxical hormetic effect and a health benefit to cancer survivors; however, the biochemical mechanisms have not been entirely elucidated. Despite the well-documented evidence implicating oxidative stress in breast cancer, the association between health benefits and redox status has not been investigated in survivors who participate in dragon boating. The present study investigated the plasmatic systemic oxidative status (SOS) in breast cancer survivors involved in two distinct physical training exercises...
January 2017: Oncology Letters
Hengbing Wang, Qi Li, Xiaobing Niu, Gongcheng Wang, Sinian Zheng, Guangbo Fu, Zengjun Wang
microRNAs (miRNAs) are a class of small RNAs that regulate gene expression. It has been demonstrated that aberrant miRNA expression is associated with cancer development and carcinogenesis. Altered miRNA expression has been suggested to occur in bladder cancer. In other cancer systems, studies have indicated that miR-143, as a tumor suppressor gene, plays essential roles in cancer progression. However, its role in bladder cancer has yet to be elucidated. In the present study, we observed that miR-143 expression was downregulated in human bladder cancer tissues and cells, and that its levels were negatively correlated with bladder cancer clinical stages...
January 2017: Oncology Letters
Zhigang Cheng, Ping Liang, Xiaoling Yu, Zhiyu Han, Fangyi Liu, Jie Yu, Xin Li
Benign focal liver lesions (BFLLs) have become a common disease diagnosed in the clinical setting following the advancement of imaging techniques. The aim of the present study was to evaluate the safety and clinical outcomes of percutaneous microwave (MW) ablation, guided by ultrasound (US), for the treatment of BFLLs. Between May 2005 and January 2011, 44 BFLLs (mean maximum diameter, 33.9±13.1 mm) in 37 patients (23 women and 14 men) were treated by US-guided percutaneous MW ablation with cooled-shaft antennae...
January 2017: Oncology Letters
Bo Chen, Yaoxi Tan, Yan Liang, Yan Li, Lei Chen, Shuangshuang Wu, Wei Xu, Yan Wang, Weihong Zhao, Jianqing Wu
Period2 (Per2) is a key mammalian circadian clock protein, and additionally has a tumor suppressive function. The present study aimed to investigate its role in drug resistance in A549/cisplatin (DDP) lung adenocarcinoma cells. Per2 knockdown and overexpression in A549/DDP cells were used to compare cell proliferation (by MTT assay), apoptosis (active-caspase 3 western blot) and clone forming assay. The activation of AKT/mechanistic target of rapamycin (mTOR) was investigated by a western blot assay. The Per2 expression level was decreased in A549/DDP cells compared with A549 cells...
January 2017: Oncology Letters
Dianguo Li, Yanhua Cao, Jinliang Li, Jialong Xu, Qian Liu, Xiaogang Sun
Neuroblastoma is a complex form of cancer with highly heterogeneous clinical behavior that arises during childhood from precursor cells of the sympathetic nervous system. In patients with neuroblastoma, mortality often occurs as a result of metastasis. The disease predominantly spreads to bone marrow, with a survival rate of ~40%. The current study demonstrates that microRNA (miR)-506 directly targets and downregulates Rho-associated, coiled-coil containing protein kinase 1 (ROCK1) in transforming growth factor (TGF)-β non-canonical pathways...
January 2017: Oncology Letters
Ryo Saga, Satoru Monzen, Mitsuru Chiba, Hironori Yoshino, Toshiya Nakamura, Yoichiro Hosokawa
Hyaluronan (HA) is a major component of the extracellular matrix that is synthesized in excess in cancer tissues. 4-methylumbelliferone (MU) inhibits the synthesis of HA and is closely related to the invasion and metastasis of cancer. However, the effects of MU in conjunction with cancer radiotherapy remain unknown. The present study assessed the anti-tumor and anti-invasion effects of the concomitant use of ionizing radiation (IR) and 100 µM MU on human fibrosarcoma HT1080 cells. Cell viability and cellular invasion potency assays were performed...
January 2017: Oncology Letters
Shenglei Li, Feng Wang, Yunhui Qu, Xiaoqi Chen, Ming Gao, Jianping Yang, Dandan Zhang, Na Zhang, Wencai Li, Hongtao Liu
Increasing evidence has demonstrated that histone deacetylase 2 (HDAC2) participates in the regulation of a variety of biological processes in numerous tumors. However, the potential role of HDAC2 in the development and progression of esophageal squamous cell carcinoma (ESCC) remains elusive. Immunohistochemistry was utilized to detect the expression of HDAC2, Cell Counting Kit-8 was used to determine the cell proliferation, and flow cytometry was employed to investigate cell cycle and cell apoptosis. Finally, western blotting was employed to detect the protein expression of cyclin D1, p21, B cell lymphoma-2 (Bcl-2) and Bcl-2-associated X protein (Bax)...
January 2017: Oncology Letters
Hongwu Fan, Guangyao Liu, Changfu Zhao, Xuefeng Li, Xiaoyu Yang
Osteosarcoma is the most common primary bone tumor in children and adolescents, typically presenting with a poor prognosis. Octamer-binding transcription factor 4 (Oct4) protein, encoded by the POU class 5 homeobox 1 gene, is important in maintaining self-renewal of pluripotent stem cells, and is closely associated with cancer. However, its role in osteosarcoma remains to be elucidated. The present study observed Oct4 was markedly increased in osteosarcoma cell lines and in human osteosarcoma tissue samples...
January 2017: Oncology Letters
Jingling Tang, Hongyu Ji, Jinmei Ren, Mengting Li, Nannan Zheng, Linhua Wu
Multidrug resistance (MDR) is a main clinical hurdle for chemotherapy of cancer, and overexpression of P-glycoprotein (P-gp) is a key factor. In the present study, a new co-delivery system for reversing MDR was designed and developed. The system was composed of curcumin (Cur) and piperine (Pip) encapsulated in solid lipid nanoparticles (SLNs) with tocopheryl polyethylene glycol succinate (TPGS) and Brij 78 [(Cur+Pip)-SLNs]. TPGS and Brij 78 could sensitize MDR tumors by inhibiting the P-gp drug efflux system...
January 2017: Oncology Letters
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