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https://www.readbyqxmd.com/read/27894814/tanshinone-iia-induced-cell-death-via-mir30b-p53-ptpn11-shp2-signaling-pathway-in-human-hepatocellular-carcinoma-cells
#1
Xuanqi Ren, Cui Wang, Binbin Xie, Linfeng Hu, Hui Chai, Lei Ding, Lihua Tang, Yongliang Xia, Xiaobing Dou
Tanshinone IIA, a multi-pharmaceutical compound from traditional Chinese herb, has been reported to have anti-hepatocarcinomic (HCC) properties through cell death induction. Apart from the typical p53-dependent pathway, mechanisms of the anti-carcinogenic role of Tanshinone remain scarce. In an effort to explore the mechanism behind Tanshinone IIA, we detected the upstream of the p53 and the potential novel pathway. Tanshinone IIA dose-dependently initiated HepG2 cell apoptosis and cell cycle arrest at the G1 checkpoint...
November 25, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27878295/silencing-of-the-long-non-coding-rna-neat1-suppresses-glioma-stem-like-properties-through-modulation-of-the-mir-107-cdk6-pathway
#2
Xiaoli Yang, Zheng Xiao, Xiaowei Du, Lina Huang, Ganqin Du
Developing novel strategies against glioma remains a significant challenge. Long non-coding RNA nuclear paraspeckle assembly transcript 1 (NEAT1) significantly contributes to the progression of many human cancers, while glioma stem cells (GSCs) are believed to be responsible for tumor progression. However, whether NEAT1 alters the stem-like properties of GSC cells remains unknown. Using microbeads, CD133+ cells were isolated and were found to possess glioma stem cell properties. Using siRNA, NEAT1 was knocked down in the sorted CD133+ U87 glioma cells...
November 22, 2016: Oncology Reports
https://www.readbyqxmd.com/read/27878260/mir-3619-5p-inhibits-prostate-cancer-cell-growth-by-activating-cdkn1a-expression
#3
Senmao Li, Chenghe Wang, Xiao Yu, Huanlei Wu, Jia Hu, Shaogang Wang, Zhangqun Ye
Recent studies have shown that miRNAs have potent abilities to activate gene expression by targeting promoter elements, a phenomenon known as RNA activation (RNAa). In the present study, we identified a new endogenous miR-3619-5p which was decreased in prostate cancer tissues and cells compared to corresponding normal controls. Moreover, overexpression of miR-3619-5p readily induced CDKN1A gene expression by directly targeting the putative site in the promoter. Besides, miR-3619-5p possessed considerable capacity to inhibit prostate cancer DU145 and PC3 cell growth, and downregulate several CDKN1A downstream genes, such as cyclin D1, CDK4 and CDK6...
November 16, 2016: Oncology Reports
https://www.readbyqxmd.com/read/27874949/mir-377-inhibited-tumorous-behaviors-of-non-small-cell-lung-cancer-through-directly-targeting-cdk6
#4
J Zhang, M Zhao, Z-Q Xue, Y Liu, Y-X Wang
OBJECTIVE: This study is aimed to investigate the cellular role of miR-377 and demonstrate that miR-377 negatively regulated cyclin-dependent kinase 6(CDK6) in human non-small cell lung cancer (NSCLC) cells. MATERIALS AND METHODS: qRT-PCR was performed to identify the miR-377 expression level in 45 paired NSCLC and adjacent normal lung tissues. Cell proliferation was measured by MTT. Apoptosis was detected by flow cytometric analysis. Luciferase reporter assays were employed to validate regulation of a putative target of miR-377...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27872202/genome-wide-overexpression-screen-identifies-genes-able-to-bypass-p16-mediated-senescence-in-melanoma
#5
Won Jae Lee, Dubravka Škalamera, Mareike Dahmer-Heath, Konstanin Shakhbazov, Max V Ranall, Carly Fox, Duncan Lambie, Alexander J Stevenson, Paul Yaswen, Thomas J Gonda, Brian Gabrielli
Malignant melanomas often arise from nevi, which result from initial oncogene-induced hyperproliferation of melanocytes that are maintained in a CDKN2A/p16-mediated senescent state. Thus, genes that can bypass this senescence barrier are likely to contribute to melanoma development. We have performed a gain-of-function screen of 17,030 lentivirally expressed human open reading frames (ORFs) in a melanoma cell line containing an inducible p16 construct to identify such genes. Genes known to bypass p16-induced senescence arrest, including the human papilloma virus 18 E7 gene (HPV18E7), and genes such as the p16-binding CDK6 with expected functions, as well as panel of novel genes, were identified, including high-mobility group box (HMGB) proteins...
November 21, 2016: Journal of Biomolecular Screening
https://www.readbyqxmd.com/read/27864121/gene-amplification-of-ccne1-ccnd1-and-cdk6-in-gastric-cancers-detected-by-multiplex-ligation-dependent-probe-amplification-and-fluorescence-in-situ-hybridization
#6
Akishi Ooi, Takeru Oyama, Ritsuko Nakamura, Ryousuke Tajiri, Hiroko Ikeda, Sachio Fushida, Yoh Dobashi
New and effective treatments for advanced gastric cancer are urgently needed. Cyclins E and D1 form a complex with cyclin-dependent kinase 2 (CDK2), 4 or 6 to regulate G1-S transition. The G1-S regulatory genes encoding cyclin E (CCNE1), cyclin D1 (CCND1) and CDK6 (CDK6) are frequently amplified in gastric cancer and may therefore influence molecularly targeted therapies against ERBB2 or EGFR when co-amplified. A total of 179 formalin-fixed and paraffin-embedded gastric cancer specimens were examined for these gene amplifications by multiplex ligation-dependent probe amplification (MLPA) and fluorescence in situ hybridization (FISH)...
November 15, 2016: Human Pathology
https://www.readbyqxmd.com/read/27849335/mycotoxin-verrucarin-a-inhibits-proliferation-and-induces-apoptosis-in-prostate-cancer-cells-by-inhibiting-prosurvival-akt-nf-kb-mtor-signaling
#7
Yongbo Liu, Xiaohua Gao, Dorrah Deeb, Yiguan Zhang, Jiajiu Shaw, Frederick A Valeriote, Subhash C Gautam
Trichothecenes are powerful mycotoxins that inhibit protein synthesis and induce ribotoxic stress response in mammalian cells. Verrucarin A (VC-A) is a Type D macrocyclic mycotoxin which inhibits cell proliferation and induces apoptosis in cancer cells. However, the antitumor activity of VC-A for prostate cancer cells has not been investigated. The objective of the present study was to determine the anticancer activity and its mechanism of action in hormone-responsive (LNCaP) and hormone-refractory (PC-3) carcinoma of the prostate (CaP) cell lines...
November 2016: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/27829219/altered-expression-of-mirnas-and-methylation-of-their-promoters-are-correlated-in-neuroblastoma
#8
Marco Maugeri, Davide Barbagallo, Cristina Barbagallo, Barbara Banelli, Stefania Di Mauro, Francesco Purrello, Gaetano Magro, Marco Ragusa, Cinzia Di Pietro, Massimo Romani, Michele Purrello
Neuroblastoma is the most common human extracranial solid tumor during infancy. Involvement of several miRNAs in its pathogenesis has been ascertained. Interestingly, most of their encoding genes reside in hypermethylated genomic regions: thus, their tumor suppressor function is normally disallowed in these tumors. To date, the therapeutic role of the demethylating agent 5'-Aza-2 deoxycytidine (5'-AZA) and its effects on miRNAome modulation in neuroblastoma have not been satisfactorily explored. Starting from a high-throughput expression profiling of 754 miRNAs and based on a proper selection, we focused on miR-29a-3p, miR-34b-3p, miR-181c-5p and miR-517a-3p as candidate miRNAs for our analysis...
November 4, 2016: Oncotarget
https://www.readbyqxmd.com/read/27823619/chikusetsusaponin-iva-methyl-ester-induces-g1-cell-cycle-arrest-triggers-apoptosis-and-inhibits-migration-and-invasion-in-ovarian-cancer-cells
#9
Xin Chen, Qiu-Shuang Wu, Fan-Cheng Meng, Zheng-Hai Tang, Xiuping Chen, Li-Gen Lin, Ping Chen, Wen-An Qiang, Yi-Tao Wang, Qing-Wen Zhang, Jin-Jian Lu
BACKGROUND: Panacis Japonici Rhizoma (PJR) is one of the most famous Chinese medical herbs that is known for exhibiting potential anti-cancer effects. PURPOSE: This study aims to isolate and investigate the anti-cancer potential of saponins from PJR in ovarian cancer cells. METHODS: The compounds were separated by comprehensive chromatographic methods. By comparison of the 1H- and 13C NMR data, as well as the HR-ESI-MS data, with the corresponding references, the structures of compounds were determined...
December 1, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27811360/p16ink4a-suppresses-brca1-deficient-mammary-tumorigenesis
#10
Alexandria Scott, Feng Bai, Ho Lam Chan, Shiqin Liu, Jinshan Ma, Joyce M Slingerland, David J Robbins, Anthony J Capobianco, Xin-Hai Pei
Senescence prevents the proliferation of genomically damaged, but otherwise replication competent cells at risk of neoplastic transformation. p16INK4A (p16), an inhibitor of CDK4 and CDK6, plays a critical role in controlling cellular senescence in multiple organs. Functional inactivation of p16 by gene mutation and promoter methylation is frequently detected in human breast cancers. However, deleting p16 in mice or targeting DNA methylation within the murine p16 promoter does not result in mammary tumorigenesis...
November 2, 2016: Oncotarget
https://www.readbyqxmd.com/read/27810077/chronic-myelogenous-leukemia-with-acquired-t-11-14-q13-q32-ccnd1-igh-a-case-report-and-literature-review
#11
M T Manda-Mapalo, P Khalili, D Quintana, I Rabinowitz, Q Y Zhang
Approximately 5-10% of chronic myeloid leukemia (CML) patients are found to have structural or numerical additional chromosomal abnormality (ACAs) in addition to the characteristic t(9;22)(q34;q11.2) BCR/ABL1 at the time of diagnosis. The prognostic significance of such additional chromosomal abnormalities has been controversial. Translocation t(11;14)(q13;q32) CCND1-IGH is typically associated with mantle cell lymphoma or a subset of plasma cell myeloma and is exceedingly rare in myeloid neoplasm. Here we report a unique case describing a patient found at diagnosis of chronic phase CML to have both the Philadelphia chromosome as well as t(11;14)-a rare cytogenetic combination...
October 2016: Cancer Genetics
https://www.readbyqxmd.com/read/27794186/downregulation-of-microrna-637-increases-risk-of-hypoxia-induced-pulmonary-hypertension-by-modulating-expression-of-cyclin-dependent-kinase-6-cdk6-in-pulmonary-smooth-muscle-cells
#12
Hai-Yan Sang, Ying-Li Jin, Wen-Qi Zhang, Li-Bo Chen
BACKGROUND The objective of this study was to investigate the molecular mechanism by which miR-637 interferes with the expression of CDK6, which contributes to the development of pulmonary hypertension (PH) with chronic obstructive pulmonary disease (COPD). MATERIAL AND METHODS We used an online miRNA database to identify CDK6 as a virtual target of miR-637, and validated the hypothesis using luciferase assay. Furthermore, we transfected SMCs with miR-637 mimics and inhibitor, and expression of CDK6 was determined using Western blot and real-time PCR...
October 29, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27793037/c-myc-is-regulated-by-hif-2%C3%AE-in-chronic-hypoxia-and-influences-sensitivity-to-5-fu-in-colon-cancer
#13
Liangjing Wang, Meng Xue, Daniel C Chung
Colorectal cancers (CRCs) invariably become hypoxic as they enlarge, and this places unique metabolic demands upon the tumor cells. Hypoxic stress can enhance the invasiveness of cancer cells and induce chemoresistance. c-Myc, an oncogene regulated by hypoxia inducible factors (HIFs), plays a critical role in cell proliferation and metabolism. However, the interplay between c-Myc and HIFs and its clinical significance in hypoxic adaptation in CRCs are unknown. We demonstrate that c-Myc mRNA and protein levels in colon cancer cells are induced within 2 h of hypoxic stress (1% O2) but are then significantly downregulated when exposed to prolonged hypoxia...
October 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27773816/high-expression-of-crept-promotes-tumor-growth-and-is-correlated-with-poor-prognosis-in-colorectal-cancer
#14
Guoxu Zheng, Weimiao Li, Baile Zuo, Zhangyan Guo, Wenjin Xi, Ming Wei, Peng Chen, Weihong Wen, An-Gang Yang
CREPT (cell cycle-related and expression elevated protein in tumor) is highly expressed in many kinds of cancer, and has been shown to be prognostic in certain cancers. However, the clinical significance of CREPT in colorectal cancer (CRC) has not been sufficiently investigated. In this study, we examined the CREPT expression in 225 clinical CRC tissues and paired adjacent normal tissues, and analyzed the correlation between CREPT expression and other clinicopathological features. We also evaluated the biological function of CREPT both in vitro and in vivo using knockdown or overexpressing CRC cells...
October 20, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27772967/microrna-320d-inhibit-proliferation-ability-of-dlbcl-cells-by-targeting-cdk6
#15
Jinfen Wang, Hong Su, Pengyan Wu
No abstract text is available yet for this article.
February 2016: Pathology
https://www.readbyqxmd.com/read/27771897/profiling-of-signaling-proteins-in-penumbra-after-focal-photothrombotic-infarct-in-the-rat-brain-cortex
#16
Svetlana Demyanenko, Anatoly Uzdensky
In ischemic stroke, cell damage propagates from infarct core to surrounding tissue. To reveal proteins involved in neurodegeneration and neuroprotection, we explored the protein profile in penumbra surrounding the photothrombotic infarct core induced in rat cerebral cortex by local laser irradiation after Bengal Rose administration. Using antibody microarrays, we studied changes in expression of 224 signaling proteins 1, 4, or 24 h after photothrombotic infarct compared with untreated contralateral cortex...
October 22, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27766389/eriocitrin-from-lemon-suppresses-the-proliferation-of-human-hepatocellular-carcinoma-cells-through-inducing-apoptosis-and-arresting-cell-cycle
#17
Ziyou Wang, Hua Zhang, Jiahui Zhou, Xiangning Zhang, Liyong Chen, Kangxing Chen, Zunnan Huang
Hepatocellular carcinoma is a lethal cancer with high recurrence ratio and lacks effective therapeutics. In the past few years, it has been reported that increased intake of vegetables and fruits could reduce the cancer incidence, which suggests dietary agents might possess anticancer effects. Eriocitrin is a flavonoid isolated from lemon, which is known as a strong antioxidant agent. We here for the first time demonstrated that eriocitrin could inhibit the proliferation of hepatocellular carcinoma cell lines by arresting cell cycle in S phase through up-regulation of p53, cyclin A, cyclin D3 and CDK6...
October 20, 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/27764802/mycl-is-a-target-of-a-bet-bromodomain-inhibitor-jq1-on-growth-suppression-efficacy-in-small-cell-lung-cancer-cells
#18
Fuyumi Kato, Francesco Paolo Fiorentino, Andreu Alibés, Manuel Perucho, Montse Sánchez-Céspedes, Takashi Kohno, Jun Yokota
We aimed to elucidate the effect of JQ1, a BET inhibitor, on small cell lung cancers (SCLCs) with MYCL amplification and/or expression. Fourteen SCLC cell lines, including four with MYCL amplification, were examined for the effects of JQ1 on protein and gene expression by Western blot and mRNA microarray analyses. The sensitivity of SCLC cells to JQ1 was assessed by cell growth and apoptosis assays. MYCL was expressed in all the 14 cell lines, whereas MYC/MYCN expression was restricted mostly to cell lines with gene amplification...
October 14, 2016: Oncotarget
https://www.readbyqxmd.com/read/27763568/overexpression-of-rack1-promotes-metastasis-by-enhancing-epithelial-mesenchymal-transition-and-predicts-poor-prognosis-in-human-glioma
#19
Qiao-Li Lv, Yuan-Tao Huang, Gui-Hua Wang, Yan-Ling Liu, Jin Huang, Qiang Qu, Bao Sun, Lei Hu, Lin Cheng, Shu-Hui Chen, Hong-Hao Zhou
Emerging studies show that dysregulation of the receptor of activated protein kinase C1 (RACK1) plays a crucial role in tumorigenesis and progression of various cancers. However, the biological function and underlying mechanism of RACK1 in glioma remains poorly defined. Here, we found that RACK1 was significantly up-regulated in glioma tissues compared with normal brain tissues, being closely related to clinical stage of glioma both in mRNA and protein levels. Moreover, Kaplan-Meier analysis demonstrated that patients with high RACK1 expression had a poor prognosis (p = 0...
October 18, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27748766/acquired-cdk6-amplification-promotes-breast-cancer-resistance-to-cdk4-6-inhibitors-and-loss-of-er-signaling-and-dependence
#20
C Yang, Z Li, T Bhatt, M Dickler, D Giri, M Scaltriti, J Baselga, N Rosen, S Chandarlapaty
Dysregulated activation of the CDK4/6 kinases is a hallmark of most mammary-derived carcinomas. ATP-competitive inhibitors against this complex have been recently advanced in the clinic and have shown significant activity, particularly against tumors driven by the estrogen receptor (ER). However, resistance to these compounds has begun to emerge often months to years after their initiation. We investigated potential mechanisms of resistance using cell line models that are highly sensitive to this class of drugs...
October 17, 2016: Oncogene
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