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International Journal of Oncology

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https://www.readbyqxmd.com/read/28627706/the-wnt-inhibitor-lgk-974-enhances-radiosensitivity-of-hepg2-cells-by-modulating-nrf2-signaling
#1
Dan Tian, Ying Shi, Dexi Chen, Qiang Liu, Feiyue Fan
Nuclear factor (erythroid-derived 2)-like 2 (NRF2) is a master regulator of antioxidant and detoxification activities that can eliminate reactive oxygen species (ROS) produced via irradiation. However, Nrf2 overexpression in liver cancer cells may cause both radioresistance and chemoresistance. Reducing Nrf2 levels can enhance the radiosensitivity of HepG2 cells. Wingless/int-3A (Wnt3A) is a Wnt family protein that mainly activates the canonical Wnt signaling pathway. Recent studies showed that the Axin1-GSK-3β protein complex, a component of the canonical Wnt signaling pathway, can capture Nrf2 and facilitate its ubiquitination and proteasomal degradation in the cytoplasm...
June 14, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627647/differences-in-telomerase-activity-and-the-effects-of-azt-in-aneuploid-and-euploid-cells-in-colon-cancer
#2
Xiao Fang, Tenghui Hu, Hua Yin, Junjun Yang, Weian Tang, Siqi Hu, Xingxiang Xu
Telomerase-targeted treatments for cancer have received a great deal of attention because telomerase is detected in nearly all cancer cells but is not expressed in most normal tissues. Aneuploidy refers to a chromosome number that is not a multiple of the base chromosome number and can indicate either hypo- or hyperploid chromosome numbers. Most solid tumors are aneuploid. In the present study, we sought to determine whether there are differences in telomerase activity and hTERT gene expression between aneuploid and euploid cells...
June 14, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627611/epithelial-mesenchymal-transition-and-cancer-stem-cell-like-phenotype-induced-by-twist1-contribute-to-acquired-resistance-to-irinotecan-in-colon-cancer
#3
Yong Yang, Guoxin Wang, Dajian Zhu, Yanfeng Huang, Yong Luo, Pengfei Su, Xiaowu Chen, Qian Wang
Inherent and acquired chemoresistance reduce the effectiveness of irinotecan in the treatment of metastatic colorectal cancer (CRC). However, the molecular mechanisms underlying this resistance process are still unclear. Twist1 is one of the master transcription factors of epithelial-mesenchymal transition (EMT). Our previous study indicated that Twist1 is overexpressed in colon cancer tissues, and demonstrated that Twist1 plays a crucial role in the chemoresistance of CRC. In the present study, we further investigated how Twist1 contribute to acquired resistance to irinotecan in colon cancer...
June 14, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627602/molecular-profiling-of-locally-advanced-rectal-adenocarcinoma-using-microrna-expression-review
#4
Cory Pettit, Steve Walston, Patrick Wald, Amy Webb, Terence M Williams
Treatment for locally-advanced rectal cancer (LARC) typically consists of neoadjuvant chemoradiation followed by total mesorectal excision. Recently, there has been growing interest in non-operative management for patients who are medically-inoperable or wish to avoid surgical morbidity and permanent colostomy. Approximately 50% of patients who receive pre-operative neoadjuvant chemoradiation develop some degree of pathologic response. Approximately 10-20% of patients are found to have a complete pathologic response, a finding which has frequently been shown to predict better clinical outcomes, including local-regional control, distant metastasis and survival...
June 14, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627695/targeted-cdx2-expression-inhibits-aggressive-phenotypes-of-colon-cancer-cells-in-vitro-and-in-vivo
#5
Jianbao Zheng, Sai He, Jie Qi, Xiaolong Wang, Junhui Yu, Yunhua Wu, Qi Gao, Kai Wang, Xuejun Sun
Loss of caudal type homeobox 2 (CDX2) is associated with the development of human colorectal cancer, while human telomerase reverse transcriptase (hTERT) frequently occurs in variety of human cancers. We investigated the effects of restoration of CDX2 expression using a hypoxia-inducible hTERT promoter-driven vector (pLVX-5HRE-hTERTp-CDX2-3FLAG) on colon cancer cell viability, cell cycle distribution, apoptosis, colony formation, invasion ability and xenograft tumor growth in nude mice. CDX2 overexpression significantly inhibited viability, colony formation, and the invasion and migration ability of LoVo cells, and induced cell cycle arrest and apoptosis in vitro, especially under hypoxic culture conditions...
June 13, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627676/luteolin-inhibits-angiogenesis-by-blocking-gas6-axl-signaling-pathway
#6
Xiaobo Li, Minfeng Chen, Xueping Lei, Maohua Huang, Wencai Ye, Rijia Zhang, Dongmei Zhang
Growth arrest-specific protein 6 (Gas6) induces the activation of Axl receptor tyrosine kinase (Axl), which plays an important role in angiogenic processes, including proliferation, migration, invasion, tube formation and pericyte recruitment of endothelial cells. The inhibition of Gas6/Axl pathway has been demonstrated to be an effective anti-angiogenic therapy. Luteolin, which is a natural active flavonoid, has been reported to possess anti-angiogenic effects. However, the underlying mechanism of luteolin in anti-angiogenesis is not fully understood...
June 13, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627667/loss-of-mir-449a-caused-prlz-overexpression-promotes-prostate-cancer-metastasis
#7
Wei Chen, Yi Liu, Hongde Chen, Hao Ning, Kejia Ding
Distant metastasis is the worst prognostic factor for PCa patients. It has been reported that miR-449a enhances radiosensitivity of prostate cancer cells, but the function of miR449a in metastasis of prostate cancer is mainly unknown. In the present study, we strove to investigate the function and diagnostic value of miR-449a in metastasis of prostate cancer. qRT-PCR was used to quantify the expression of miR449a and PrLZ in PCa cell lines and tissues. we found that miR449a expression was decreased in PCa cell lines...
June 12, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627586/hsp70-acetylation-prevents-caspase-dependent-independent-apoptosis-and-autophagic-cell-death-in-cancer-cells
#8
Yoo Hoi Park, Ji Hae Seo, Ji-Hyeon Park, Hye Shin Lee, Kyu-Won Kim
Cancer cells are continuously challenged by adverse environmental factors including hypoxia, metabolite restriction, and immune reactions, and must adopt diverse strategies to survive. Heat shock protein (Hsp) 70 plays a central role in protection against stress-induced cell death by maintaining protein homeostasis and interfering with the process of programmed cell death. Recent findings have suggested that Hsp70 acetylation is a key regulatory modification required for its chaperone activity, but its relevance in the process of programmed cell death and the underlying mechanisms involved are not well understood...
June 12, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627678/bevacizumab-counteracts-vegf-dependent-resistance-to-erlotinib-in-an-egfr-mutated-nsclc-xenograft-model
#9
Chinami Masuda, Mieko Yanagisawa, Keigo Yorozu, Mitsue Kurasawa, Koh Furugaki, Nobuyuki Ishikura, Toshiki Iwai, Masamichi Sugimoto, Kaname Yamamoto
Erlotinib, an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), shows superior efficacy in patients with non-small cell lung cancer (NSCLC) harboring activating EGFR mutations (EGFR Mut+). However, almost all tumors eventually develop resistance to erlotinib. Recently, the Phase II JO25567 study reported significant prolongation of progression-free survival (PFS) by erlotinib plus bevacizumab combination compared with erlotinib in EGFR Mut+ NSCLC. Herein, we established a preclinical model which became refractory to erlotinib after long-term administration and elucidated the mode of action of this combination...
June 8, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28627598/curcumin-exerts-its-tumor-suppressive-function-via-inhibition-of-nedd4-oncoprotein-in-glioma-cancer-cells
#10
Xue Wang, Jiaojiao Deng, Jinxia Yuan, Xin Tang, Yuelong Wang, Haifeng Chen, Yi Liu, Liangxue Zhou
Glioblastoma is the most common brain cancer in adults. It represents one of the top ten malignant tumors with an average survival time of nine months despite treatments with surgery, radiotherapy and chemotherapy. Curcumin is a phytochemical turmeric isolated from root of the Curcuma longa plant. Accumulating evidence have proved that curcumin targets numerous cancer signaling pathways. The E3 ubiquitin ligase NEDD4, neural precursor cell expressed developmentally downregulated protein 4, is frequently overexpressed in various cancers...
June 8, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28586007/apg-1252-12a-induces-mitochondria-dependent-apoptosis-through-inhibiting-the-antiapoptotic-proteins-bcl-2-bcl-xl-in-hl-60-cells
#11
Jing Wang, Dajun Yang, Qiuyun Luo, Miaozhen Qiu, Lin Zhang, Baoxia Li, Haibo Chen, Hanjie Yi, Xianglei Yan, Shuxia Li, Jian Sun
Acute myeloid leukemia (AML) is the most common acute leukemia in adults. Despite improved remission rates, current treatment regimens for AML are often associated with a very poor prognosis and adverse effects, necessitating more effective and safer agents. B-cell leukemia/lymphoma 2 (Bcl-2) family proteins regulate apoptotic pathway that can be targeted with small molecule inhibitors. APG-1252-12A is a Bcl-2 homology (BH)-3 mimetic that specifically binds to Bcl-2 and Bcl-xl, which has shown efficacy in some Bcl-2 dependent hematological cancers...
June 6, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28586009/fli-1-overexpression-in-erythroleukemic-cells-promotes-erythroid-de-differentiation-while-spi-1-pu-1-exerts-the-opposite-effect
#12
Laura M Vecchiarelli-Federico, Tangjingjun Liu, Yao Yao, Yuanyuan Gao, Yanmei Li, You-Jun Li, Yaacov Ben-David
The ETS transcription factors play a critical role during hematopoiesis. In F-MuLV-induced erythroleukemia, Fli‑1 insertional activation producing high expression of this transcription factor required to promote proliferation. How deregulated Fli‑1 expression alters the balance between erythroid differentiation and proliferation is unknown. To address this issue, we exogenously overexpressed Fli‑1 in an erythroleukemic cell harboring activation of spi‑1/PU.1, another ETS gene involved in erythroleukemogenesis...
June 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28586006/butein-inhibits-nf-%C3%AE%C2%BAb-ap-1-and-akt-activation-in-adult-t-cell-leukemia-lymphoma
#13
Chie Ishikawa, Masachika Senba, Naoki Mori
Human T-cell leukemia virus type 1 (HTLV-1) is the causative agent of adult T-cell leukemia/lymphoma (ATLL) but there is no effective treatment for HTLV-1-associated diseases. Herein, we determined the effect of butein, a bioactive plant polyphenol, on cell growth, apoptosis and signaling pathways in HTLV-1-infected T-cell lines and on tumor growth in SCID mice. Treatment with butein caused a decrease in viability of HTLV-1-infected T-cell lines. T cells cultured with butein showed obvious apoptosis morphology, and cleavage of poly(ADP-ribose) polymerase with activation of caspase-3, -8 and -9...
June 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560457/regulation-of-autophagy-and-emt-by-the-interplay-between-p53-and-ras-during-cancer-progression-review
#14
Xiaofei Zhang, Qian Cheng, Huijing Yin, Gong Yang
Cellular autophagy and epithelial-mesenchymal transition (EMT) are key events mostly resulted from the interplay of tumor suppressors and oncogenes during cancer progression. The master tumor suppressor p53 may control tumor cell autophagy and EMT through the transcriptional induction of multiple target genes, while the activated oncogene RAS may also play a critical role in regulating mitogenic signaling to tumor cell autophagy and EMT. Although the fundamental functions of p53 and RAS are well understood, the interactive effects of p53 and RAS on autophagy and EMT are still unclear...
May 31, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560455/microrna%C3%A2-146a%C3%A2-5p-enhances-cisplatin%C3%A2-induced-apoptosis-in-ovarian-cancer-cells-by-targeting-multiple-anti%C3%A2-apoptotic-genes
#15
Xiaodi Li, Yuhao Jin, Zekun Mu, Wei Chen, Songshan Jiang
MicroRNAs play a crucial role in gene expression regulation in various types of cancers. Previous studies show the expression level of miR‑146a‑5p is downregulated in epithelial ovarian cancer. Further investigations suggest this downregulation is responsible for apoptosis resistance in ovarian cancer cells. However, the mechanism of how miR‑146a‑5p promotes apoptosis remains unclear. In this study, the role of miR‑146a‑5p in cisplatin‑induced apoptosis of ovarian cancer cells was assessed by DAPI staining, MTT assays, and monitoring expression of XIAP, BCL2L2, BIRC2 and BIRC5 through a dual‑luciferase assay...
May 29, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560424/secretomic-profiling-of-cells-from-hollow-fiber-bioreactor-reveals-psma3-as-a-potential-cholangiocarcinoma-biomarker
#16
Chris Verathamjamras, Churat Weeraphan, Daranee Chokchaichamnankit, Kamolwan Watcharatanyatip, Pantipa Subhasitanont, Penchatr Diskul-Na-Ayudthaya, Kanokwan Mingkwan, Virat Luevisadpaibul, Somchai Chutipongtanate, Voraratt Champattanachai, Jisnuson Svasti, Chantragan Srisomsap
Cholangiocarcinoma (CCA), derived from the bile duct, occurs with a relatively high incidence in Northeast Thailand. Early diagnosis is still hampered by the lack of sufficient biomarkers. In recent years, biomarker discovery using secretomes has provided interesting results, including our studies on CCA secretomes, especially with three-dimensional cell cultures. Thus, cells cultured using the hollow fiber bioreactor (HFB) with 20 kDa molecular weight cut-off (MWCO) yielded higher quality and quantity of secretomes than those from conditioned media of the monolayer culture (MNC) system...
May 29, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560402/anticancer-effects-of-phytocannabinoids-used-with-chemotherapy-in-leukaemia-cells-can-be-improved-by-altering-the-sequence-of-their-administration
#17
Katherine A Scott, Angus G Dalgleish, Wai M Liu
Phytocannabinoids possess anticancer activity when used alone, and a number have also been shown to combine favourably with each other in vitro in leukaemia cells to generate improved activity. We have investigated the effect of pairing cannabinoids and assessed their anticancer activity in cell line models. Those most effective were then used with the common anti-leukaemia drugs cytarabine and vincristine, and the effects of this combination therapy on cell death studied in vitro. Results show a number of cannabinoids could be paired together to generate an effect superior to that achieved if the components were used individually...
May 29, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560410/dclk1-is-correlated-with-met-and-erk5-expression-and-associated-with-prognosis-in-malignant-pleural-mesothelioma
#18
Hui Wang, Yu-Yuan Dai, Wen-Qian Zhang, Ping-Chih Hsu, Yi-Lin Yang, Yu-Cheng Wang, Geraldine Chan, Alfred Au, Zhi-Dong Xu, Shu-Juan Jiang, Wei Wang, David M Jablons, Liang You
Malignant pleural mesothelioma (MPM) is an aggressive cancer for which more effective treatments are needed. In this study, strong to moderate staining of MET and ERK5 was detected in 67.1 and 48% of the analyzed 73 human mesothelioma tumors, and significant correlation of MET and ERK5 expression was identified (P<0.05). We evaluated the doublecortin-like kinase 1 (DCLK1) expression in human mesothelioma tumors. Our results showed that 50.7% of the immunohistochemistry analyzed human mesothelioma tumors have strong to moderate staining of DCLK1, and its expression is significantly correlated with MET or ERK5 expression (P<0...
May 26, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560396/mitochondrial-ca2-removal-amplifies-trail-cytotoxicity-toward-apoptosis-resistant-tumor-cells-via-promotion-of-multiple-cell-death-modalities
#19
Natsuhiko Takata, Yohei Ohshima, Miki Suzuki-Karasaki, Yukihiro Yoshida, Yasuaki Tokuhashi, Yoshihiro Suzuki-Karasaki
Ca2+ has emerged as a new target for cancer treatment since tumor-specific traits in Ca2+ dynamics contributes to tumorigenesis, malignant phenotypes, drug resistance, and survival in different tumor types. However, Ca2+ has a dual (pro-death and pro-survival) function in tumor cells depending on the experimental conditions. Therefore, it is necessary to minimize the onset of the pro-survival Ca2+ signals caused by the therapy. For this purpose, a better understanding of pro-survival Ca2+ pathways in cancer cells is critical...
May 25, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28560430/fyn-heterogeneous-nuclear-ribonucleoprotein-e1-signaling-regulates-pancreatic-cancer-metastasis-by-affecting-the-alternative-splicing-of-integrin-%C3%AE-1
#20
Peng Jiang, Zhonghu Li, Feng Tian, Xiaowu Li, Jin Yang
Pancreatic cancer is characterized by a dense desmoplastic reaction in which extracellular matrix proteins accumulate and surround tumor cells. Integrins and their related signaling molecules are associated with progression of pancreatic cancer. In the present study, the association between the metastasis of pancreatic cancer and the expression of hnRNP E1 and integrin β1 was evaluated. In vitro and in vivo experiments were designed to study the mechanism underlying the regulation of integrin β1 splicing by the Fyn/hnRNP E1 spliceosome...
May 24, 2017: International Journal of Oncology
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