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https://www.readbyqxmd.com/read/27921263/overexpression-of-protein-phosphatase-1%C3%AE-pp1%C3%AE-is-associated-with-enhanced-cell-proliferation-and-poor-prognosis-in-hepatocellular-carcinoma
#1
Chunsun Li, Miaomiao Wu, Guijuan Zong, Chunhua Wan, Qingqing Liu, Huiling Zhou, Lu Hua, Yuyan Chen, Xudong Chen, Cuihua Lu
BACKGROUND: Protein phosphatase 1γ (PP1γ), as a member of the protein phosphatase 1 family, may be involved in regulation of multiple cellular processes, such as mitosis, cell survival, and apoptosis. However, little is known about the underlying mechanisms by which PP1γ regulates hepatocellular carcinoma development. AIM: We investigated the expression profile of PP1γ in hepatocellular carcinoma (HCC) cell lines and human HCC specimens, as well as its potential prognostic significance in HCC...
December 5, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27921254/the-impact-of-vitamin-d-supplementation-on-neurodegeneration-tnf-%C3%AE-concentration-in-hypothalamus-and-csf-to-plasma-ratio-of-insulin-in-high-fat-diet-induced-obese-rats
#2
Ghazaleh Nameni, Ghazaleh Hajiluian, Parviz Shahabi, Mahdieh Abbasalizad Farhangi, Mehran Mesgari-Abbasi, Mohammad-Reza Hemmati, Seyed Mahdi Vatandoust
There is growing evidence that obesity can lead to neurodegeneration induced by pro-inflammatory cytokines such as tumor necrosis factor (TNF-α). Moreover, obesity is associated with reduced transport of insulin through the blood-brain barrier (BBB). Insulin deficiency in the brain especially in the hypothalamus region has neurodegenerative and obesity-promoting effects. Because of the anti-inflammatory and neuroprotective effects of vitamin D, in the current experimental study, we aimed to investigate the effects of vitamin D supplementation on neurodegeneration, TNF-α concentration in the hypothalamus, and cerebrospinal fluid (CSF) to serum ratio of insulin in high-fat-diet-induced obese rats...
December 6, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/27921229/an-extracellular-proteasome-releases-endostatin-from-human-collagen-xviii
#3
Maria L V Reiss-Pistilli, Detlef Schuppan, Madalena M S Barroso, Iranaia Assunção-Miranda, Shirley Farias, Letícia Lery, Michael Bauer, Luiz Juliano, Maria A Juliano, Tatiana Coelho-Sampaio
Endostatin is a potent anti-angiogenic and anti-tumor protein capable of regressing tumors without inducing acquired resistance. Since it is a fragment of the parental molecule, collagen XVIII, its endogenous production depends on the activity of a specific proteolytic enzyme. While such an enzyme has been described in mice, a human counterpart has not been identified so far. Here, we searched for this enzyme by using a fluorescence resonance energy transfer peptide containing the cleavage site of human collagen XVIII...
December 5, 2016: Angiogenesis
https://www.readbyqxmd.com/read/27921054/a-rare-case-of-sunitinib-induced-exfoliative-esophagitis
#4
Swapna Gayam, Ashwini Anumandla
Sunitinib is a chemotherapeutic agent that has been approved for renal cell carcinoma and gastrointestinal stromal tumors resistant to imatinib. It is usually well tolerated and severe gastrointestinal side effects are rare. There are very few reports of sunitinib causing severe esophagitis, and only one of them was previously reported as exfoliative esophagitis. We describe a case of severe sunitinib-induced exfoliative esophagitis that resulted in overt gastrointestinal bleed.
August 2016: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27920819/co-administration-of-metformin-and-n-acetylcysteine-with-dietary-control-improves-the-biochemical-and-histological-manifestations-in-rats-with-non-alcoholic-fatty-liver
#5
Naglaa Mohamed El-Lakkany, Sayed Hassan Seif El-Din, Abdel-Nasser Abdel-Aal Sabra, Olfat Ali Hammam, Fatma Abdel-Latif Ebeid
Non-alcoholic fatty liver disease (NAFLD) is a burgeoning health problem that affects 1/3 of the adult population and an increasing number of children in developed countries. Oxidative stress and insulin resistance are the mechanisms that seem to be mostly involved in its pathogenesis. This study was conceived in a NAFLD rat model to evaluate the efficacy of both metformin (MTF) and N-acetylcysteine (NAC) with dietary control on biochemical and histologic liver manifestations. Rats were classified into nine groups; normal (I), NAFLD-induced by feeding high-fat diet (HFD; II) for 12 weeks, NAFLD switched to regular diet (RD; III), NAFLD-HFD or -RD treated with MTF in a dose of 150 mg/kg (IV, V), NAC in a dose of 500 mg/kg (VI, VII) or MTF+NAC (VIII, IX) respectively for 8 weeks...
October 2016: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27920558/monitoring-the-effects-of-doxorubicin-on-3d-spheroid-tumor-cells-in-real-time
#6
NamHuk Baek, Ok Won Seo, MinSung Kim, John Hulme, Seong Soo A An
Recently, increasing numbers of cell culture experiments with 3D spheroids presented better correlating results in vivo than traditional 2D cell culture systems. 3D spheroids could offer a simple and highly reproducible model that would exhibit many characteristics of natural tissue, such as the production of extracellular matrix. In this paper numerous cell lines were screened and selected depending on their ability to form and maintain a spherical shape. The effects of increasing concentrations of doxorubicin (DXR) on the integrity and viability of the selected spheroids were then measured at regular intervals and in real-time...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27920552/the-relationship-between-the-expression-of-usp22-bmi1-and-ezh2-in-hepatocellular-carcinoma-and-their-impacts-on-prognosis
#7
Run Zhai, Fang Tang, Jianhua Gong, Jing Zhang, Biao Lei, Bo Li, Yangchao Wei, Xingsi Liang, Bo Tang, Songqing He
Recent studies have shown that deubiquitination plays a key role in tumor progression, metastasis, resistance to chemotherapy drugs, and prognosis. In this study, we investigated the effects of the deubiquitinating enzyme USP22 on the expression of the drug-resistance genes BMI1 and EZH2 in hepatocellular carcinoma (HCC) and on prognosis. Downregulation of USP22 expression with interference ribonucleic acid in resistant HCC cell lines with high USP22 expression resulted in decreased BMI1 expression, but had no effect on EZH2 expression...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27919820/tnf-%C3%AE-and-cancer-cachexia-molecular-insights-and-clinical-implications
#8
REVIEW
Hetal J Patel, Bhoomika M Patel
Cancer cachexia characterized by a chronic wasting syndrome, involves skeletal muscle loss and adipose tissue loss and resistance to conventional nutritional support. Cachexia is responsible for the reduction in quality and length of life of cancer patients. It also decreases the muscle strength of the patients. The pro-inflammatory and pro-cachectic factors produced by the tumor cells have important role in genesis of cachexia. A number of pro-inflammatory cytokines, like interleukin-1 (IL-1), IL-6, tumor necrosis factor- alpha (TNF-α) may have important role in the pathological mechanisms of cachexia in cancer...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27919796/the-bad-seed-gardener-deubiquitinases-in-the-cancer-stem-cell-signaling-network-and-therapeutic-resistance
#9
REVIEW
Guan-Zhong Qiu, Wei Sun, Ming-Zhu Jin, Jing Lin, Pei-Gang Lu, Wei-Lin Jin
Tumors are comprised of highly heterogeneous populations of cells, of which only a small subset of stem-like cells possess the ability to regenerate tumors in vivo. These rare cancer stem cells (CSCs) have been regarded as the "bad seeds" accounted for tumor initiation, progression, metastasis, relapse and therapeutic resistance. CSC-targeted therapy seems to be a better avenue for radical cure of cancer. Deubiquitinases (DUBs), specifically disassembling ubiquitin chains, have been demonstrated to play an important role in rigidly maintaining the balance between ubiquitination and deubiquitination for protein quality control and homeostasis in normal circumstances...
December 2, 2016: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27919627/randomized-phase-2-trial-of-pharmacodynamic-separation-of-pemetrexed-and-intercalated-erlotinib-versus-pemetrexed-alone-for-advanced-nonsquamous-non-small-cell-lung-cancer
#10
Tianhong Li, Bilal Piperdi, William V Walsh, Mimi Kim, Laurel A Beckett, Rasim Gucalp, Missak Haigentz, Venu G Bathini, Huiyu Wen, Kaili Zhou, Patricia B Pasquinelli, Srikanth Gajavelli, Meera Sreedhara, Xianhong Xie, Primo N Lara, David R Gandara, Roman Perez-Soler
BACKGROUND: Pharmacodynamic separation of pemetrexed and erlotinib avoids negative cellular interactions and results in antitumor synergy in erlotinib-resistant non-small-cell lung cancer (NSCLC) cells, independent of EGFR (epidermal growth factor receptor) genotype. PATIENTS AND METHODS: Patients with platinum-treated metastatic nonsquamous NSCLC were randomly assigned 1:2 to pemetrexed alone (500 mg/m(2) provided intravenously on day 1) or pemetrexed followed by erlotinib (150 mg provided orally once daily on days 2-17) every 21 days...
October 28, 2016: Clinical Lung Cancer
https://www.readbyqxmd.com/read/27919596/chimeric-anterolateral-thigh-free-flap-for-reconstruction-of-complex-cranio-orbito-facial-defects-after-skull-base-cancers-resection
#11
Mario Cherubino, Mario Turri-Zanoni, Paolo Battaglia, Marco Giudice, Igor Pellegatta, Federico Tamborini, Francesca Maggiulli, Luca Guzzetti, Danilo Di Giovanna, Maurizio Bignami, Carolina Calati, Paolo Castelnuovo, Luigi Valdatta
Complex cranio-orbito-facial defects after skull base cancers resection entail a functional and esthetic reconstruction. The introduction of endoscopic assisted techniques for excision surgery with the advances in reconstructive surgery and anesthesiology allowed to improve the management of such critical patients. We report a series of chimeric anterolateral thigh (ALT) flaps used to reconstruct complex cranio-orbital-facial defects after skull base surgery. A retrospective review of patients that underwent cranio-orbito-facial reconstruction using a chimeric ALT flap from March 2013 to October 2015 at a single tertiary care referral Institute was performed...
November 2, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27919217/drug-delivery-nanoparticles-in-treating-chemoresistant-tumor-cells
#12
Giuseppina Barrera, Martina Daga, Benedetta Ferrara, Chiara Dianzani, Stefania Pizzimenti, Monica Argenziano, Roberta Cavalli, Francesco Trotta
Intrinsic or acquired chemoresistance represents the main obstacle to the successful treatment of cancer patients. Several mechanisms are involved in multidrug resistance: decreased uptake of hydrophilic drugs, increase of energy dependent efflux, alteration of the redox state, alteration of apoptotic pathways, and modification of the tumor microenvironment. In recent years, several types of nanoparticles have been developed to overcome these obstacles and improve the accumulation and release of drugs at the pathological site...
December 5, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27918555/gene-expression-profiling-of-anti-ctla4-treated-metastatic-melanoma-in-patients-with-treatment-induced-autoimmunity
#13
Scott C Bresler, Le Min, Scott J Rodig, Andrew C Walls, Shuyun Xu, Songmei Geng, F Stephen Hodi, George F Murphy, Christine G Lian
Ipilimumab (IPI) is a monoclonal antibody that targets the inhibitory CTLA4 receptor of T cells, enhancing T-cell-driven antitumor responses. IPI therapy in metastatic melanoma results in significant improvement in disease-free and overall survival, although after initial responses disease progression generally ensues. Identification of specific responses in tissue where melanoma tumor cells are subjected to IPI-driven immune attack may reveal mechanisms of treatment efficacy or resistance, permitting refinement of targeted therapeutic approaches...
December 5, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27918554/asic1a-mediates-the-drug-resistance-of-human-hepatocellular-carcinoma-via-the-ca-2-pi3-kinase-akt-signaling-pathway
#14
Yihao Zhang, Ting Zhang, Chao Wu, Quan Xia, Dujuan Xu
Chemotherapy is the main treatment method of patients with advanced liver cancer. However, drug resistance is a serious problem in the treatment of hepatocellular carcinoma (HCC). Acid sensing ion channel 1a (ASIC1a) is a H(+)-gated cation channel; it mediates tumor cell migration and invasion, which suggests that it is involved in the development of malignant tumors. Therefore, we studied the relationship between ASIC1a and drug resistance in human hepatocellular carcinoma. In our study, we found that ASIC1a is highly expressed in human HCC tissue, and that its levels were significantly increased in resistant HCC cells Bel7402/FU and HepG2/ADM...
December 5, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27918551/hepatocarcinogenesis-in-transgenic-mice-carrying-hepatitis-b-virus-pre-s-s-gene-with-the-sw172-mutation
#15
M-W Lai, K-H Liang, W-R Lin, Y-H Huang, S-F Huang, T-C Chen, C-T Yeh
Hepatitis B virus (HBV) carrying the rtA181T/sW172* mutation conferred cross-resistance to adefovir and lamivudine. Cell-based and clinical studies indicated that HBV carrying this mutation had an increased oncogenic potential. Herein, we created transgenic mouse models to study the oncogenicity of the HBV pre-S/S gene containing this mutation. Transgenic mice were generated by transfer of the HBV pre-S/S gene together with its own promoter into C57B6 mice. Four lines of mice were created. Two of them carried wild-type gene and produced high and low levels of HBV surface antigen (HBsAg) (TgWT-H and L)...
December 5, 2016: Oncogenesis
https://www.readbyqxmd.com/read/27918441/tp53-microrna-interplay-in-hepatocellular-carcinoma
#16
REVIEW
Daniela Pollutri, Laura Gramantieri, Luigi Bolondi, Francesca Fornari
The role of microRNAs as oncogenes and tumor suppressor genes has emerged in several cancers, including hepatocellular carcinoma (HCC). The pivotal tumor suppressive role of p53-axis is indicated by the presence of inactivating mutations in TP53 gene in nearly all cancers. A close interaction between these two players, as well as the establishment of complex p53/miRNAs loops demonstrated the strong contribution of p53-effector miRNAs in enhancing the p53-mediated tumor suppression program. On the other hand, the direct and indirect targeting of p53, as well as the regulation of its stability and activity by specific microRNAs, underlie the importance of the fine-tuning of p53 pathway, affecting the cell fate of damaged/transformed cells...
December 2, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27918237/gpx3-promoter-methylation-predicts-platinum-sensitivity-in-colorectal-cancer
#17
Lorraine Pelosof, Sashidhar Yerram, Todd Armstrong, Nina Chu, Ludmila Danilova, Breann Yanagisawa, Manuel Hidalgo, Nilofer Azad, James G Herman
Epigenetic control of gene expression is a major determinant of tumor phenotype and has been found to influence sensitivity to individual chemotherapeutic agents. Glutathione peroxidase 3 (GPX3, plasma glutathione peroxidase) is a key component of cellular antioxidant regulation and its gene has been reported to be methylated in specific tumor types. GPX3 role in oxidative damage has been associated with sensitivity to platinums in other tumors but its importance in colorectal cancer (CRC) has not been determined...
December 5, 2016: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/27918099/mir-193b-mediates-cebpd-induced-cisplatin-sensitization-through-targeting-ets1-and-cyclin-d1-in-human-urothelial-carcinoma-cells
#18
Siao-Ren Lin, Hsin-Chih Yeh, Wei-Jan Wang, Hung-Lung Ke, Hui-Hui Lin, Wei-Chi Hsu, Shi-Yi Chao, Tzyh-Chyuan Hour, Wen-Jeng Wu, Yeong-Shiau Pu, A-Mei Huang
Transcription factor CCAAT/enhancer-binding protein delta (CEBPD) plays multiple roles in tumor progression. Studies have demonstrated that cisplatin (CDDP) induced CEBPD expression and had led to chemotherapeutic drug resistance. However, the underlying molecular mechanisms of CDDP-regulated CEBPD expression and its relevant roles in CDDP responses remain elusive. MicroRNAs (miRNAs) are small non-coding RNAs that negatively regulate gene expression in a sequence-specific manner. Abnormal miRNAs expression is associated with tumor progression...
December 5, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27917951/catalytic-conversion-of-lipophilic-substrates-by-phase-constrained-enzymes-in-the-aqueous-or-in-the-membrane-phase
#19
Marcus Cebula, Ilke Simsek Turan, Birgitta Sjödin, Madhuranayaki Thulasingam, Joseph Brock, Volodymyr Chmyrov, Jerker Widengren, Hiroshi Abe, Bengt Mannervik, Jesper Z Haeggström, Agnes Rinaldo-Matthis, Engin U Akkaya, Ralf Morgenstern
Both soluble and membrane-bound enzymes can catalyze the conversion of lipophilic substrates. The precise substrate access path, with regard to phase, has however, until now relied on conjecture from enzyme structural data only (certainly giving credible and valuable hypotheses). Alternative methods have been missing. To obtain the first experimental evidence directly determining the access paths (of lipophilic substrates) to phase constrained enzymes we here describe the application of a BODIPY-derived substrate (PS1)...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917791/investigation-of-the-expression-of-rif1-gene-on-head-and-neck-pancreatic-and-brain-cancer-and-cancer-stem-cells
#20
Hacer E GursesCila, Muradiye Acar, Furkan B Barut, Mehmet Gunduz, Reidar Grenman, Esra Gunduz
PURPOSE: Recent studies have shown that cancer stem cells are resistant to chemotherapy. The aim of this study was to compare RIF1 gene expression in head and neck, pancreatic cancer and glioma cell lines and the cancer stem cells isolated from these cell lines. METHODS: UT-SCC-74 from Turku University and UT-SCC-74B primary tumor metastasis and neck cancer cell lines, YKG-1 glioma cancer cell line from RIKEN, pancreatic cancer cell lines and ASPC-1 cells from ATCC were grown in cell culture...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
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