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https://www.readbyqxmd.com/read/28915658/oxidative-stress-mediates-an-increased-formation-of-vascular-endothelial-growth-factor-in-human-hepatocarcinoma-cells-exposed-to-erlotinib
#1
Nataliya Rohr-Udilova, Florian Klinglmüller, Martha Seif, Hubert Hayden, Martin Bilban, Matthias Pinter, Klaus Stolze, Wolfgang Sieghart, Markus Peck-Radosavljevic, Michael Trauner
The tyrosine kinase inhibitor erlotinib targets the receptor of epidermal growth factor (EGFR) involved in development of hepatocellular carcinoma (HCC). Although inefficient in established HCC, erlotinib has been recently proposed for HCC chemoprevention. Since Cyp3A4 and Cyp1A2 enzymes metabolize erlotinib in the liver, the insights into the mechanisms of erlotinib effects on liver cells with maintained drug metabolizing activity are needed. We applied erlotinib to both commercially available (SNU398, Huh7) and established in Austria HCC cell lines (HCC-1...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28903330/inhibition-of-hsf1-suppresses-the-growth-of-hepatocarcinoma-cell-lines-in-vitro-and-akt-driven-hepatocarcinogenesis-in-mice
#2
Antonio Cigliano, Chunmei Wang, Maria G Pilo, Marta Szydlowska, Stefania Brozzetti, Gavinella Latte, Giovanni M Pes, Rosa M Pascale, Maria A Seddaiu, Gianpaolo Vidili, Silvia Ribback, Frank Dombrowski, Matthias Evert, Xin Chen, Diego F Calvisi
Upregulation of the heat shock transcription factor 1 (HSF1) has been described as a frequent event in many cancer types, but its oncogenic role in hepatocellular carcinoma (HCC) remains poorly delineated. In the present study, we assessed the function(s) of HSF1 in hepatocarcinogenesis via in vitro and in vivo approaches. In particular, we determined the importance of HSF1 on v-Akt murine thymoma viral oncogene homolog (AKT)-induced liver cancer development in mice. We found that knockdown of HSF1 activity via specific siRNA triggered growth restraint by suppressing cell proliferation and inducing massive cell apoptosis in human HCC cell lines...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28902369/synergistic-inhibitory-effects-on-hepatocellular-carcinoma-with-recombinant-human-adenovirus-aspp2-and-oxaliplatin-via-p53-independent-pathway-in-vitro-and-in-vivo
#3
Xiaoni Liu, Jianji Xu, Shuang Wang, Xiaoxiao Yu, Boxin Kou, Mengyin Chai, Yunjin Zang, Dexi Chen
The present study was designed to investigate the synergistic inhibitory effects on hepatocellular carcinoma with recombinant human adenovirus Aspp2 (Aspp2-ad) and oxaliplatin via p53-independent pathway in vitro and in vivo. After being treated with Aspp2-ad and/or oxaliplatin for 24-48 h, HepG2P53-/- and Hep3B cells showed a significant growth inhibition compared with vehicle control. Combination group showed a synergetic effect, the inhibitory rates were all above 80% at 48 h point in HepG2P53-/- and Hep3B cells...
August 29, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28901955/hepg2-and-human-healthy-hepatocyte-in-vitro-culture-and-co-culture-in-pcl-electrospun-platforms
#4
Ines Fasolino, Vincenzo Guarino, Marica Marrese, Valentina Cirillo, Marianna Vallifuoco, Maria Luisa Tamma, Valentina Vassallo, Adele Bracco, Fulvio Calise, Luigi Ambrosio
The discovery of new drugs to treat pathological cells in the case of aggressive liver primary cancer is imposing the identification of high-throughput screening systems to predict the in vivo response of new therapeutic molecules, in order to reduce current use of animals and drug testing costs. Recently, micro/nanostructured scaffolds have been adopted to reproduce the hepatic microenvironment due to their higher similarity to the biological niche with respect to the traditional two-dimensional culture plate, so providing novel in vitro models for reliably understanding molecular mechanisms related to cancer cells activity...
September 13, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28900784/liver-involvement-in-urea-cycle-disorders-a-review-of-the-literature
#5
REVIEW
Adrien Bigot, Michel C Tchan, Benjamin Thoreau, Hélène Blasco, François Maillot
Urea cycle disorders (UCDs) are inborn errors of metabolism of the nitrogen detoxification pathway and encompass six principal enzymatic deficiencies. The aging of UCD patients leads to a better knowledge of the long-term natural history of the condition and to the reporting of previously unnoticed manifestations. Despite historical evidence of liver involvement in UCDs, little attention has been paid to this organ until recently. Hence, we reviewed the available scientific evidence on acute and chronic liver dysfunction and liver carcinogenesis in UCDs and discuss their pathophysiology...
September 12, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28894987/the-induction-of-apoptosis-and-autophagy-in-human-hepatoma-smmc-7721-cells-by-combined-treatment-with-vitamin-c-and-polysaccharides-extracted-from-grifola-frondosa
#6
Fei Zhao, Jin Zhao, Lei Song, Ya-Qing Zhang, Zhong Guo, Ke-Hu Yang
Polysaccharides extracted from the mushroom Grifola frondosa (GFP) are a potential anticancer agent. The objective of this study was to investigate the effect of GFP and vitamin C (VC) alone and in combination on the viability of human hepatocarcinoma SMMC-7721 and HepG2 cells. Studies designed to detect cell apoptosis and autophagy were also conducted to investigate the mechanism. Results from the cell viability assay indicated that a combination of GFP (0.2 or 0.25 mg/mL) and VC (0.3 mmol/L) (GFP/VC) led to 52...
September 11, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28894223/long-term-administration-of-nuclear-bile-acid-receptor-fxr-agonist-prevents-spontaneous-hepatocarcinogenesis-in-abcb4-mice
#7
Marica Cariello, Claudia Peres, Roberta Zerlotin, Emanuele Porru, Carlo Sabbà, Aldo Roda, Antonio Moschetta
Altered bile acid (BA) signaling is associated with hepatotoxicity. The farnesoid X receptor (FXR) is a nuclear receptor that transcriptionally regulates BA homeostasis. Mice with FXR ablation present hepatocarcinoma (HCC) due to high toxic BA levels. Mice with Abcb4 ablation accumulate toxic BA within the bile ducts and present HCC. We have previously shown that intestinal specific activation of FXR by transgenic VP16-FXR chimera is able to reduce BA pool size and prevent HCC. Here we tested chemical FXR activation by administering for 15 months the dual FXR/ membrane G protein-coupled receptor (TGR5) agonist INT-767 (6α-ethyl-3α,7α,23-trihydroxy-24-nor-5β-cholan-23-sulphate) to Fxr(-/-) and Abcb4(-/-) mice...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28887921/cytotoxicity-and-mode-of-action-of-a-naturally-occurring-naphthoquinone-2-acetyl-7-methoxynaphtho-2-3-b-furan-4-9-quinone-towards-multi-factorial-drug-resistant-cancer-cells
#8
Victor Kuete, Armelle T Mbaveng, Louis P Sandjo, Maen Zeino, Thomas Efferth
INTRODUCTION: Malignacies are still a major public concern worldwide and despite the intensive search of new chemotherapeutic agents, treatment still remains a challenging issue. The present study was designed to evaluate the cytotoxicity of 2-acetyl-7-methoxynaphtho[2,3-b]furan-4,9-quinone (AMNQ) isolated from the bark of Milletia versicolor towards a panel of drug-sensitive and multidrug-resistant (MDR) cancer cell lines. METHODS: The resazurin reduction assay was used to evaluate the cytotoxicity of AMNQ against 9 drug-sensitive and multidrug-resistant (MDR) cancer cell lines...
September 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28867805/cytotoxic-activity-of-origanum-vulgare-l-on-hepatocellular-carcinoma-cell-line-hepg2-and-evaluation-of-its-biological-activity
#9
Hazem S Elshafie, Maria F Armentano, Monica Carmosino, Sabino A Bufo, Vincenzo De Feo, Ippolito Camele
The potential of plant essential oils (EOs) in anticancer treatment has recently received many research efforts to overcome the development of multidrug resistance and their negative side effects. The aims of the current research are to study (i) the cytotoxic effect of the crude EO extracted from Origanum vulgare subsp hirtum and its main constituents (carvacrol, thymol, citral and limonene) on hepatocarcinoma HepG2 and healthy human renal cells HEK293; (ii) the antibacterial and phytotoxic activities of the above EO and its main constituents...
August 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28864870/20-s-25-methoxyl-dammarane-3%C3%AE-12%C3%AE-20-triol-negatively-regulates-activation-of-stat3-and-erk-pathways-and-exhibits-anti-cancer-effects-in-hepg2-cells
#10
Hui-Han Ai, Zi-Long Zhou, Lu-Guo Sun, Mei-Ting Yang, Wei Li, Chun-Lei Yu, Zhen-Bo Song, Yan-Xin Huang, Yin Wu, Lei Liu, Xiao-Guang Yang, Yu-Qing Zhao, Yong-Li Bao, Yu-Xin Li
The pro-inflammatory cytokine interleukin 6 (IL-6), via activating its downstream JAK/STAT3 and Ras/ERK signaling pathways, is involved in cell growth, proliferation and anti-apoptotic activities in various malignancies. To screen inhibitors of IL-6 signaling, we constructed a STAT3 and ERK dual-pathway responsive luciferase reporter vector (Co.RE). Among several candidates, the natural compound 20(S)-25-methoxyl-dammarane-3β, 12β, 20-triol (25-OCH3-PPD, GS25) was identified to clearly inhibit the luciferase activity of Co...
September 1, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28862300/interaction-of-per2-with-the-constitutive-androstane-receptor-possibly-links-circadian-rhythms-to-metabolism
#11
Tomaž Martini, Jurij Stojan, Damjana Rozman, Uršula Prosenc Zmrzljak
Period 2 (PER2) is an important factor in daily oscillations called circadian rhythms, which are emerging as one of the most important regulatory networks, responsible for homeostasis and transcriptional regulation of a number of genes. Our work shows that PER2 could act as a co-activator of the constitutive androstane receptor (CAR), a key nuclear receptor (NR) that regulates the metabolism of endobiotics and xenobiotics. Bioinformatic analysis shows that PER2 and CAR possess structural elements that could enable them to interact which was confirmed experimentally by CoIP experiment...
September 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/28861631/unenhanced-magnetic-resonance-imaging-immediately-after-radiofrequency-ablation-of-liver-malignancy-preliminary-results
#12
Mirko D'Onofrio, Nicolò Cardobi, Andrea Ruzzenente, Simone Conci, Valentina Ciaravino, Alfredo Guglielmi, Roberto Pozzi Mucelli
PURPOSE: To assess the accuracy of unenhanced magnetic resonance imaging (MRI) immediately after the percutaneous ultrasound-guided radiofrequency ablation (RFA) of liver malignancy in predicting treatment efficacy at CT follow-up. MATERIALS AND METHODS: Percutaneous ablation was prospectively performed in 23 liver malignancies (20 hepatocarcinomas and 3 metastases). After the procedure in the same day all patients were studied with unenhanced MRI. The best sequence to detect the coagulative necrosis was visually established...
August 31, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28857232/hepatic-ppar%C3%AE-coactivator-1%C3%AE-drives-mitochondrial-and-anabolic-signatures-that-contribute-to-hepatocellular-carcinoma-progression
#13
Elena Piccinin, Claudia Peres, Elena Bellafante, Simon Ducheix, Claudio Pinto, Gaetano Villani, Antonio Moschetta
The peroxisome proliferator-activated receptor γ (PPARγ) coactivator-1β (PGC-1 β) coactivator is a master regulator of mitochondrial biogenesis and oxidative metabolism as well as of antioxidant defense. Specifically in the liver PGC-1β also promotes de novo lipogenesis, thus sustaining cellular anabolic processes. Given the relevant pathogenic role of mitochondrial and fatty acid metabolism in hepatocarcinoma (HCC), here we pointed to PGC-1β as a putative novel transcriptional player in the development and progression of HCC...
August 31, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28843248/moringa-oleifera-root-induces-cancer-apoptosis-more-effectively-than-leave-nanocomposites-and-its-free-counterpart
#14
Ahmed A Abd-Rabou, Aboelfetoh M Abdalla, Naglaa A Ali, Khairy MA Zoheir
Medicinal plants are important elements of indigenous medical system that have persisted in developing countries. Many of the botanical chemo-preventions currently used as potent anticancer agents. However, some important anticancer agents are still extracted from plants because they cannot be synthesized chemically on a commercial scale due to their complex structures that often contain several chiral centers. The aim of this study was to test different extracts from the Moringa oleifera leaves (ML), its PLGA-CS-PEG nanocomposites (MLn), as well as root core (Rc) and outer (Ro) parts for activity against hepatocarcinoma HepG2, breast MCF7, and colorectal HCT 116/ Caco-2 cells in vitro...
August 27, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28843180/photoactivation-provides-a-mechanistic-explanation-for-pan-assay-interference-behaviour-of-2-aminopyrroles-in-lipoxygenase-inhibition
#15
Hao Guo, Nikolaos Eleftheriadis, Nataliya Rohr-Udilova, Alexander Dömling, Frank J Dekker
Human 15-lipoxygenase-1 (h-15-LOX-1) is a promising drug target in inflammation and cancer. In this study substitution-oriented screening (SOS) has been used to identify compounds with a 2-aminopyrrole scaffold as inhibitors for h-15-LOX-1. The observed structure activity relationships (SAR) proved to be relatively flat. IC50's for the most potent inhibitor of the series did not surpass 6.3 μM and the enzyme kinetics demonstrated uncompetitive inhibition. Based on this, we hypothesized that the investigated 2-aminopyrroles are pan assay interference compounds (PAINS) with photoactivation via a radical mechanism...
July 24, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28801583/effect-of-x-ray-irradiation-on-hepatocarcinoma-cells-and-erythrocytes-in-salvaged-blood
#16
Feng-Jiang Zhang, Jin-Ting Yang, Li-Hui Tang, Wen-Na Wang, Kai Sun, Yue Ming, Kanhar Ghulam Muhammad, Yin-Fei Zheng, Min Yan
The broad clinical acceptance of intraoperative blood salvage and its applications in cancer surgery remain controversial. Until now, a method that can safely eliminate cancer cells while preserving erythrocytes does not exist. Here, we investigated whether X-ray generated from linear accelerator irradiation at a certain dose can kill hepatocarcinoma cells while preserving erythrocytes. HepG2, SK-Hep1 or Huh7 cells were mixed into the aliquots of erythrocytes obtained from healthy volunteers. After the mixed cells were exposed to 30 Gy and 50 Gy X-rays irradiation, the viability, clonogenicity, DNA synthesis and tumorigenicity of the tumor cells were determined by the MTT assay, plate colony formation, 5-ethynyl-2'-deoxyuridine incorporation, and subcutaneous xenograft implantation into immunocompromised mice...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28790340/verteporfin-inhibits-growth-of-human-glioma-in-vitro-without-light-activation
#17
Ahmad Al-Moujahed, Katarzyna Brodowska, Tomasz P Stryjewski, Nikolaos E Efstathiou, Ioannis Vasilikos, Joanna Cichy, Joan W Miller, Evangelos Gragoudas, Demetrios G Vavvas
Verteporfin (VP), a light-activated drug used in photodynamic therapy for the treatment of choroidal neovascular membranes, has also been shown to be an effective inhibitor of malignant cells. Recently, studies have demonstrated that, even without photo-activation, VP may still inhibit certain tumor cell lines, including ovarian cancer, hepatocarcinoma and retinoblastoma, through the inhibition of the YAP-TEAD complex. In this study, we examined the effects of VP without light activation on human glioma cell lines (LN229 and SNB19)...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783177/autophagy-dependent-generation-of-axin2-cancer-stem-like-cells-promotes-hepatocarcinogenesis-in-liver-cirrhosis
#18
J Li, S B Hu, L Y Wang, X Zhang, X Zhou, B Yang, J H Li, J Xiong, N Liu, Y Li, Y Z Wu, Q C Zheng
Autophagy is a pathophysiological phenomenon in liver cirrhosis that can further progress into hepatocarcinoma. Liver cancer stem cells (CSCs) are believed to initiate hepatocarcinogenesis. To investigate the precise mechanism related to the origin of CSCs in liver cirrhosis and hepatocarcinogenesis, we labeled Axin2+ hepatic cells with EGFP in Axin2Cre;Rosa26EGFP transgenic rats, and then stratified clinical and rat liver cirrhosis samples by autophagy flux. Clinical follow-up and lineage tracing in transgenic rat liver cirrhosis revealed that while Axin2/EGFP+ hepatic cells were present in normal livers and cirrhotic livers without aberrant autophagy, hepatic Axin2/EGFP+CD90+ cells were generated exclusively in cirrhotic livers with aberrant autophagy and promoted hepatocarcinogenesis...
August 7, 2017: Oncogene
https://www.readbyqxmd.com/read/28768515/a-comparative-assessment-of-antiproliferative-properties-of-resveratrol-and-ethanol-leaf-extract-of-anogeissus-leiocarpus-dc-guill-and-perr-against-hepg2-hepatocarcinoma-cells
#19
COMPARATIVE STUDY
Jeremiah Olorunjuwon Olugbami, Robert Damoiseaux, Bryan France, Esther Modupe Onibiyo, Michael Adedapo Gbadegesin, Shivani Sharma, James Kazimierz Gimzewski, Oyeronke Adunni Odunola
BACKGROUND: Epidemiological and experimental evidences have shown cancer as a leading cause of death worldwide. Although the folklore use of plants as a reliable source of health-restoring principles is well-documented, the search for more of such plants that are active against diseases, such as cancer, continues. We report here a laboratory-based evidence of the relevance of an ethanol leaf extract of Anogeissus leiocarpus (A2L) in comparison with resveratrol, a natural polyphenol, in cancer therapy...
August 2, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28755185/the-liver-in-tyrosinemia-type-i-clinical-management-and-course-in-quebec
#20
Ugur Halac, Josée Dubois, Grant A Mitchell
HT1 is a severe autosomal recessive disorder due to the deficiency of fumarylacetoacetate hydrolase (FAH), the final enzyme in the degradation of tyrosine. Before the era of treatment with 2-(2-N-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC), even with newborn screening and optimal diet therapy, HT1 patients often developed liver failure. Death was common in patients who did not undergo liver transplantation. For the last two decades, NTBC has revolutionized the management of HT1 patients. In screened newborns treated within the first month of life, we have not observed hepatocarcinoma...
2017: Advances in Experimental Medicine and Biology
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