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https://www.readbyqxmd.com/read/28927122/mechanism-of-egcg-promoting-apoptosis-of-mcf-7-cell-line-in-human-breast-cancer
#1
Chao-You Huang, Zheng Han, Xi Li, Hui-Hua Xie, Shan-Shan Zhu
The aim of the present study was to investigate the effects of epigallocatechin-3-gallate (EGCG) on the apoptosis of the human MCF-7 cancer cell line and the underlying mechanism. MCF-7 cells were divided into the control group and EGCG groups. The proliferation of MCF-7 cells in the two groups was determined using MTT and apoptosis was examined using flow cytometry. Western blot analysis and qRT-PCR were used to analyze P53 and Bcl-2 expression levels. The silencing effect of specific siRNA was evaluated using RT-PCR and western blot analysis...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927098/notch-1-is-a-valuable-therapeutic-target-against-cell-survival-and-proliferation-in-clear-cell-renal-cell-carcinoma
#2
Zhiming Zhuang, Jiangui Lin, Yiqun Huang, Tianqi Lin, Zhouda Zheng, Xudong Ma
Notch 1 is a key component of the Notch pathway, which performs a crucial role in clear cell renal cell carcinoma (CCRCC) development. The present study aimed to investigate whether Notch 1 could serve as a potential target for CCRCC treatment. Firstly, an association analysis was performed using 52 CCRCC cases and 30 normal controls. The results indicated that Notch 1 protein expression in renal tissues was closely associated with the incidence of CCRCC. In addition, higher Notch 1 expression in CCRCC tissues was positively associated with higher tumor-node-metastasis stage and Fuhrman grade, in addition to larger tumor size...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927090/downregulation-of-pdcd4-by-mir-21-suppresses-tumor-transformation-and-proliferation-in-a-nude-mouse-renal-cancer-model
#3
Haixin Yuan, Shiyong Xin, Yaoping Huang, Yingfan Bao, Hao Jiang, Liqing Zhou, Xiaoqiang Ren, Liang Li, Qian Wang, Jianguo Zhang
Programmed cell death 4 (PDCD4) is known to suppress neoplastic transformation, cell proliferation and metastasis, and to be downregulated by microRNA-21 (miR-21) in renal cell carcinoma (RCC) cell lines and tissues. The aim of the present study was to investigate the roles of and association between PDCD4 and miR-21 in a nude mouse renal cancer model. A total of 24 BALB/c male nude mice were randomly assigned into the following three groups: Negative control (NC; n=8), miR-21 inhibitor (n=8) and miR-21 mimic (n=8)...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927036/urotensin-ii-receptor-as-a-potential-biomarker-for-the-prognosis-of-hepatocellular-carcinoma-patients
#4
Hongtao Wei, Xiaotong Yu, Xiaowei Xue, Hui Liu, Menglong Wang, Yingying Li, Xuejiang Wang, Huiguo Ding
Urotensin II and the associated urotensin II receptor (UTR) are important in the carcinogenesis of hepatocellular carcinoma (HCC). However, the clinical significance of UTR remains to be elucidated. The aim of the present study was to investigate if UTR exhibits the potential to act as a biomarker to predict the prognosis of HCC patients. The effects of UTR on motility and invasion of HCC cells were additionally investigated. UTR expression levels were determined by immunohistochemistry, in 83 HCC patients that previously underwent curative liver resection...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926924/il-1%C3%AE-induced-nf-%C3%AE%C2%BAb-activation-down-regulates-mir-506-expression-to-promotes-osteosarcoma-cell-growth-through-jag1
#5
Minghua Hu, Xianyu Yuan, Yangming Liu, Shunsheng Tang, Jinglei Miao, Qiliang Zhou, Shijie Chen
Nowadays, the role of miRNA in tumorigenesis has been largely reported. It was found that miR-506 might be associated with tumorigenesis of various cancers. The present study was aimed to investigate the character of miR-506 and some related factors in human osteosarcoma (OS) carcinogenesis. The expression level of miR-506 was downregulated in OS compared with the normal control group by RT-PCR, both in vivo and in vitro. In addition, IL-1β stimulation decreased the expression of miR-506. MiR-506 interfered with JAG1 gene transcription throughmiR-506 binding to the 3'-UTR region of JAG1 gene...
September 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28926773/dectin-1-is-essential-for-il-1%C3%AE-production-through-jnk-activation-and-apoptosis-in-aspergillus-fumigatus-keratitis
#6
Kelan Yuan, Guiqiu Zhao, Chengye Che, Cui Li, Jing Lin, Guoqiang Zhu, Kun He
PURPOSE: To investigate the role of phosphorylated JNK in Dectin-1-induced IL-1β production and the role of Dectin-1 in apoptosis in mouse Aspergillus fumigatus (A. fumigatus) keratitis. METHODS: Mice corneas were pretreated with Dectin-1 siRNA or SP600125 (the inhibitor of JNK) before A. fumigatus infection. THP-1 macrophages were preincubated with SP600125 before the stimulation of A. fumigatus conidia. Dectin-1, IL-1β, JNK, Bax, Bcl-2, cytochrome-c (cyt-c), caspase-9, caspase-8 and caspase-3 expressions were tested by PCR, Western blot, or Immunofluorescence staining...
September 16, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28926616/co-ordinated-activation-of-classical-and-novel-pkc-isoforms-is-required-for-pma-induced-mtorc1-activation
#7
Mengling Liu, Christopher J Clarke, Mohamed F Salama, Yeon Ja Choi, Lina M Obeid, Yusuf A Hannun
Protein kinase C (PKC) has been shown to activate the mammalian target of rapamycin complex 1 (mTORC1) signaling pathway, a central hub in the regulation of cell metabolism, growth and proliferation. However, the mechanisms by which PKCs activate mTORC1 are still ambiguous. Our previous study revealed that activation of classical PKCs (cPKC) results in the perinuclear accumulation of cPKC and phospholipase D2 (PLD2) in recycling endosomes in a PLD2-dependent manner. Here, we report that mTORC1 activation by phorbol 12,13-myristate acetate (PMA) requires both classic, cPKC, and novel PKC (nPKC) isoforms, specifically PKCη, acting through distinct pathways...
2017: PloS One
https://www.readbyqxmd.com/read/28926527/genistein-suppresses-aerobic-glycolysis-and-induces-hepatocellular-carcinoma-cell-death
#8
Sainan Li, Jingjing Li, Weiqi Dai, Qinghui Zhang, Jiao Feng, Liwei Wu, Tong Liu, Qiang Yu, Shizan Xu, Wenwen Wang, Xiya Lu, Kan Chen, Yujing Xia, Jie Lu, Yingqun Zhou, Xiaoming Fan, Wenhui Mo, Ling Xu, Chuanyong Guo
BACKGROUND: Genistein is a natural isoflavone with many health benefits, including antitumour effects. Increased hypoxia-inducible factor 1 α (HIF-1α) levels and glycolysis in tumour cells are associated with an increased risk of mortality, cancer progression, and resistance to therapy. However, the effect of genistein on HIF-1α and glycolysis in hepatocellular carcinoma (HCC) is still unclear. METHODS: Cell viability, apoptosis rate, lactate production, and glucose uptake were measured in HCC cell lines with genistein incubation...
September 19, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28926138/tnfaip8-regulates-hippo-pathway-through-interacting-with-lats1-to-promote-cell-proliferation-and-invasion-in-lung-cancer
#9
Yong Han, ZhongPing Tang, Yue Zhao, Qingchang Li, Enhua Wang
TNFAIP8 is associated with prognosis of several human malignancies. However, the molecular mechanism of TNFAIP8 in lung cancer remains unknown. In our study, we found TNFAIP8 could enhance TEAD luciferase activity and inhibits the activity of Hippo pathway. TNFAIP8 also increased cyclin D1, CDK6 and decreased p27 in lung cancer cells. In addition, TNFAIP8 increased total YAP protein and promoted nuclear localization of YAP. More importantly, YAP depletion blocked the role of TNFAIP8 on cell cycle-related proteins and TEAD luciferase activity, revealing that TNFAIP8 regulates Hippo pathway in a YAP-dependend manner...
September 19, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28925810/ube3a-mediated-regulation-of-imprinted-genes-and-epigenome-wide-marks-in-human-neurons
#10
S Jesse Lopez, Keith Dunaway, M Saharul Islam, Charles Mordaunt, Annie Vogel Ciernia, Makiko Meguro-Horike, Shin-Ichi Horike, David J Segal, Janine LaSalle
The dysregulation of genes in neurodevelopmental disorders that lead to social and cognitive phenotypes is a complex, multilayered process involving both genetics and epigenetics. Parent-of-origin effects of deletion and duplication of the 15q11-q13 locus leading to Angelman, Prader-Willi, and Dup15q syndromes are due to imprinted genes, including UBE3A, which is maternally expressed exclusively in neurons. UBE3A encodes a ubiquitin E3 ligase protein with multiple downstream targets, including RING1B, which in turn monoubiquitinates histone variant H2A...
September 19, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28925678/dual-functionalized-graphene-oxide-based-sirna-delivery-system-for-implant-surface-bio-modification-with-enhanced-osteogenesis
#11
Li Zhang, Qing Zhou, Wen Song, Kaimin Wu, Yumei Zhang, Yimin Zhao
Surface functionalization by siRNA is a novel strategy for improved implant osseointegration. Gene delivery system with safety and high transfection activity is a crucial factor for siRNA-functionalized implant to exert its biological function. To this end, polyethylene glycol (PEG) and polyethylenimine (PEI) dual-functionalized graphene oxide (GO) (nGO-PEG-PEI) may present a promising siRNA vector. In this study, nano-sized nGO-PEG-PEI was prepared and optimized for siRNA delivery. Titania nanotubes (NT) fabricated by anodic oxidation were bio-modified with nGO-PEG-PEI/siRNA by cathodic electrodeposition, designated as NT-GPP/siRNA...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28925481/functional-impact-of-galectin-3-and-trail-expression-in-breast-cancer-cells
#12
X-H Liu, C-X Deng, P-C Hu, Y Wang, Y-H Dong
OBJECTIVE: To examine the expression of Galectin-3 and TRAIL in breast cancer tissue and their effects on the proliferation and apoptosis of breast cancer cells. PATIENTS AND METHODS: Breast cancer and normal adjacent tissue were collected from 120 patients pathologically diagnosed with breast cancer who underwent a modified radical mastectomy. SP method of immunohistochemistry was used to detect the expression levels of Galectin-3 and TRAIL in breast cancer tissues and normal adjacent tissues...
August 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28925080/specific-knock-down-of-tissue-non-specific-alkaline-phosphatase-mrna-levels-inhibits-intracellular-lipid-accumulation-in-3t3-l1-and-hepg2-cells
#13
George Chirambo, Chantal van Niekerk, Nigel J Crowther
The use of non-specific inhibitors of tissue non-specific alkaline phosphatase (TNSALP) in pre-adipocytes blocks intracellular lipid accumulation. TNSALP is also expressed in hepatocytes, which are known to accumulate lipid in a similar manner to pre-adipocytes. The purpose of this study was to use specific silencing of TNSALP mRNA, using short interfering (si) RNA, to investigate the role of TNSALP in intracellular lipid accumulation in 3T3-L1 and HepG2 cells. Cellular activity of TNSALP was measured using an automated colorimetric assay, and intracellular lipid accumulation was determined using the lipid-specific dye, Oil Red O...
September 19, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28924923/plant-insects-and-mites-uptake-double-stranded-rna-upon-its-exogenous-application-on-tomato-leaves
#14
Anupam Gogoi, Nomi Sarmah, Athanasios Kaldis, Dionysios Perdikis, Andreas Voloudakis
Exogenously applied double-stranded RNA (dsRNA) molecules onto tomato leaves, moved rapidly from local to systemic leaves and were uptaken by agricultural pests namely aphids, whiteflies and mites. Four small interfering RNAs, deriving from the applied dsRNA, were molecularly detected in plants, aphids and mites but not in whiteflies. Double-stranded RNA (dsRNA) acts as the elicitor molecule of the RNA silencing (RNA interference, RNAi), the endogenous and evolutionary conserved surveillance system present in all eukaryotes...
September 18, 2017: Planta
https://www.readbyqxmd.com/read/28924379/the-overexpression-of-carm1-promotes-human-osteosarcoma-cell-proliferation-through-the-pgsk3%C3%AE-%C3%AE-catenin-cyclind1-signaling-pathway
#15
Shijie Li, Dongdong Cheng, Bin Zhu, Qingcheng Yang
Osteosarcoma (OS) is a kind of malignant bone tumor that occurs frequently in the region surrounding the knee joint and poses a threat to the health of teenagers. Since the application of chemotherapy to treat OS, 5-year survival rate in patients has improved from 10% to 70%, but patient survival has not changed over the past four decades. Coactivator-associated arginine methyltransferase 1 (CARM1) is a member of the PRMT protein family; it acts as an oncogene in many cancers, but its function in OS is still unknown...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28924364/mir-224-controls-human-colorectal-cancer-cell-line-hct116-proliferation-by-targeting-smad4
#16
Jinzhe Zhou, Muren Hu, Fei Wang, Meiyi Song, Qi Huang, Bujun Ge
Background: Better understanding the molecular mechanisms responsible for the genesis and progression of colorectal cancer would help advance the novel therapeutics. miR-224 has been identified to be elevated in colorectal cancer and promote human colorectal cancer cell line SW480 proliferation and invasion. However, the effect of miRNAs on cancer cell proliferation could be significantly changeable among different cell lines. HCT116 is a commonly used cell line for colorectal cancer study and the target gene responsible for the function of miR-224 in its proliferation is unclear...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28924349/autophagy-promotes-degradation-of-polyethyleneimine-alginate-nanoparticles-in-endothelial-progenitor-cells
#17
Guo-Dong Wang, Yu-Zhen Tan, Hai-Jie Wang, Pei Zhou
Polyethyleneimine (PEI)-alginate (Alg) nanoparticle (NP) is a safe and effective vector for delivery of siRNA or DNA. Recent studies suggest that autophagy is related to cytotoxicity of PEI NPs. However, contribution of autophagy to degradation of PEI-Alg NPs remains unknown. CD34(+)VEGFR-3(+) endothelial progenitor cells isolated from rat bone marrow were treated with 25 kDa branched PEI modified by Alg. After treatment with the NPs, morphological changes and distribution of the NPs in the cells were examined with scanning and transmission electron microscopies...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28923956/arabidopsis-m-6-a-demethylase-activity-modulates-viral-infection-of-a-plant-virus-and-the-m-6-a-abundance-in-its-genomic-rnas
#18
Mireya Martínez-Pérez, Frederic Aparicio, Maria Pilar López-Gresa, Jose María Bellés, Jesus A Sánchez-Navarro, Vicente Pallás
N(6)-methyladenosine (m(6)A) is an internal, reversible nucleotide modification that constitutes an important regulatory mechanism in RNA biology. Unlike mammals and yeast, no component of the m(6)A cellular machinery has been described in plants at present. m(6)A has been identified in the genomic RNAs of diverse mammalian viruses and, additionally, viral infection was found to be modulated by the abundance of m(6)A in viral RNAs. Here we show that the Arabidopsis thaliana protein atALKBH9B (At2g17970) is a demethylase that removes m(6)A from single-stranded RNA molecules in vitro...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923830/the-role-of-crp-and-atg9b-expression-in-clear-cell-renal-cell-carcinoma
#19
Zheng Ma, Zengguang Qi, Jiangsong Li, Jing Yang, Zhonghua Xu
Background: The purpose of the study is to investigate the correlation between the expression of C-reactive protein ( CRP ) and autophagy-related 9B ( ATG9B ) and pathological features of clear cell renal cell carcinoma (CCRCC) patients. We also intended to explore the effects of manipulated expression of CRP and ATG9B on the apoptosis and cell cycle progressing of CCRCC cell line. Material and Methods : ATG9B expression in CCRCC tissues and adjacent renal tissues was analyzed by immunohistochemistry (IHC)...
September 18, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28923824/snapin-promotes-hiv-1-transmission-from-dendritic-cells-by-dampening-tlr8-signaling
#20
Elham Khatamzas, Madeleine Maria Hipp, Daniel Gaughan, Tica Pichulik, Alasdair Leslie, Ricardo A Fernandes, Daniele Muraro, Sarah Booth, Kieran Zausmer, Mei-Yi Sun, Benedikt Kessler, Sarah Rowland-Jones, Vincenzo Cerundolo, Alison Simmons
HIV-1 traffics through dendritic cells (DCs) en route to establishing a productive infection in T lymphocytes but fails to induce an innate immune response. Within DC endosomes, HIV-1 somehow evades detection by the pattern-recognition receptor (PRR) Toll-like receptor 8 (TLR8). Using a phosphoproteomic approach, we identified a robust and diverse signaling cascade triggered by HIV-1 upon entry into human DCs. A secondary siRNA screen of the identified signaling factors revealed several new mediators of HIV-1 trans-infection of CD4(+) T cells in DCs, including the dynein motor protein Snapin...
September 18, 2017: EMBO Journal
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