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https://www.readbyqxmd.com/read/28820908/ribosomopathy-like-properties-of-murine-and-human-cancers
#1
Sucheta Kulkarni, James M Dolezal, Huabo Wang, Laura Jackson, Jie Lu, Brian P Frodey, Atinuke Dosunmu-Ogunbi, Youjun Li, Marc Fromherz, Audry Kang, Lucas Santana-Santos, Panayiotis V Benos, Edward V Prochownik
Ribosomopathies comprise a heterogeneous group of hematologic and developmental disorders, often characterized by bone marrow failure, skeletal and other developmental abnormalities and cancer predisposition. They are associated with mutations and/or haplo-insufficiencies of ribosomal proteins (RPs) and inefficient ribosomal RNA (rRNA) processing. The resulting ribosomal stress induces the canonical p19ARF/Mdm2/p53 tumor suppressor pathway leading to proliferative arrest and/or apoptosis. It has been proposed that this pathway is then inactivated during subsequent neoplastic evolution...
2017: PloS One
https://www.readbyqxmd.com/read/28818685/ethyl-carbamate-induces-cell-death-through-its-effects-on-multiple-metabolic-pathways
#2
Huichang Liu, Bo Cui, Yi Xu, Chaoyang Hu, Ying Liu, Guorun Qu, Dawei Li, Yongning Wu, Dabing Zhang, Sheng Quan, Jianxin Shi
Ethyl carbamate (EC), a multisite carcinogenic chemical causing tumors in various animal species, is probably carcinogenic to humans. However, information about the possible carcinogenic and toxicological effects of EC in humans is quite limited. Because EC is found in many dietary foods (such as fermented foods) and tobacco and its products, and exposure of humans to EC often occurs inevitably, its toxicological effects in humans need to be studied. This study was conducted to understand the metabolomic and transcriptomic changes in human hepatocellular carcinoma cells (HepG2) exposed to 100 mM EC for short term (4 h) and long term (12 h) period, respectively...
August 14, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28816981/changes-of-platelet-times-neutrophil-to-lymphocyte-ratio-predict-bclc-stage-a-hepatocellular-carcinoma-survival
#3
Chen Jin, Chuan Li, Wei Peng, Tian-Fu Wen, Lv-Nan Yan, Bo Li, Wen-Tao Wang, Jia-Yin Yang, Ming-Qing Xu
Platelet, neutrophil, and lymphocyte ratio (PNLR) has its own unique role in influencing postoperative recurrence for patients with hepatocellular carcinoma (HCC). Surgical stress can change systemic inflammatory response of patients. Thus the aim of this study was to identify the prognostic value of changes of platelet times neutrophil to lymphocyte ratio in hepatitis B related HCC within Barcelona clinical liver cancer (BCLC) stage A.Data of patients with HCC within BCLC stage A were reviewed. Pre-, intra- and postoperative variables were retrospectively and statistically analyzed...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28811864/identification-of-four-oxidative-stress-responsive-micrornas-mir-34a-5p-mir-1915-3p-mir-638-and-mir-150-3p-in-hepatocellular-carcinoma
#4
Yong Wan, Ruixia Cui, Jingxian Gu, Xing Zhang, Xiaohong Xiang, Chang Liu, Kai Qu, Ting Lin
Increasing evidence suggests that oxidative stress plays an essential role during carcinogenesis. However, the underlying mechanism between oxidative stress and carcinogenesis remains unknown. Recently, microRNAs (miRNAs) are revealed to be involved in oxidative stress response and carcinogenesis. This study aims to identify miRNAs in hepatocellular carcinoma (HCC) cells which might involve in oxidative stress response. An integrated analysis of miRNA expression signature was performed by employing robust rank aggregation (RRA) method, and four miRNAs (miR-34a-5p, miR-1915-3p, miR-638, and miR-150-3p) were identified as the oxidative stress-responsive miRNAs...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28811106/questiomycin-a-stimulates-sorafenib-induced-cell-death-via-suppression-of-glucose-regulated-protein-78
#5
Kayo Machihara, Hidenori Tanaka, Yoshihiro Hayashi, Ichiro Murakami, Takushi Namba
Hepatocellular carcinoma (HCC) is one of the most difficult cancers to treat owing to the lack of effective chemotherapeutic methods. Sorafenib, the first-line and only available treatment for HCC, extends patient overall survival by several months, with a response rate below 10%. Thus, the identification of an agent that enhances the anticancer effect of sorafenib is critical for the development of therapeutic options for HCC. Endoplasmic reticulum (ER) stress response is one of the methods of sorafenib-induced cell death...
August 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28804621/development-of-gene-polymorphisms-in-meditators-of-nonalcoholic-fatty-liver-disease
#6
Chun Wang, Jianping Gong, Hao Wu
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, the morbidity of which closely correlates with diversity of ethnicity, minority, family and location. Its histology spans from simple steatosis, to nonalcoholic steatohepatitis, which ultimately results in fibrosis, cirrhosis and hepatocellular carcinoma. The accelerating prevalence of NAFLD is due to an incremental incidence of metabolic syndrome that is distinguished by dyslipidemia, glucose impairment, obesity, excessive oxidative stress and adipocytokine impairment...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28802237/umbelliferon-%C3%AE-d-glucopyranosyl-2-i-%C3%A2-1-ii-%C3%AE-dglucopyranoside-ameliorates-diethylnitrosamine-induced-precancerous-lesion-development-in-liver-via-regulation-of-inflammation-hyperproliferation-and-antioxidant-at-pre-clinical-stage
#7
Vikas Kumar, Prakash Chandra Bhatt, Mahfoozur Rahman, Fahad A Al-Abbasi, Firoz Anwar, Amita Verma
It is well documented that anomalous production of inflammatory proteins linked with most of the toxic expression and genesis of diverse chronic disease including cancer. Diethylnitrosamine (DEN) a well-known hepatotoxin and hepatocarcinogen, can induce oxidative stress and inflammatory reaction in it. Umbelliferone, secondary metabolites, is present in different plants and widely consumed by humans as medicine and food supplements. The aim of the current study was to scrutinize the chemoprotective potential of umbelliferon-α-d-glucopyranosyl-(2(I)→1(II))-α-d-glucopyranoside (UFD) against DEN-induced hepatocellular carcinoma (HCC) in experimental rats...
August 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28794318/dysregulated-expression-of-mitf-in-subsets-of-hepatocellular-carcinoma-and-cholangiocarcinoma
#8
Nattakarn Nooron, Koji Ohba, Kazuhisa Takeda, Shigeki Shibahara, Anchalee Chiabchalard
Cholangiocarcinoma represents the second most common primary liver tumor after hepatocellular carcinoma. Mahanine, a carbazole alkaloid derived from Murraya koenigii (Linn.) Spreng, has been used as folk medicine in Thailand, where the liver fluke-associated cholangiocarcinoma is common. The expression of microphthalmia-associated transcription factor (MITF) is maintained at immunohistochemically undetectable levels in hepatocytes and cholangiocytes. To explore the regulation of MITF expression in the liver, we immunohistochemically analyzed the MITF expression using hepatocellular carcinoma and cholangiocarcinoma specimens of the human liver cancer tissue array...
August 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28756230/haloperidol-a-sigma-receptor-1-antagonist-promotes-ferroptosis-in-hepatocellular-carcinoma-cells
#9
Tao Bai, Shuai Wang, Yipu Zhao, Rongtao Zhu, Weijie Wang, Yuling Sun
Ferroptosis is a novel form of cell death, which is characterized by accumulation of reactive oxygen species (ROS). Sigma 1 receptor (S1R) has been suggested to function in oxidative stress metabolism. Both erastin and sorafenib significantly induced S1R protein expression. Haloperidol strongly promoted erastin- and sorafenib-induced cell death, which was blocked by ferrostatin-1 but not ZVAD-FMK or necrosulfonamide. During ferroptosis, haloperidol substantially increased the cellular levels of Fe(2+), GSH and lipid peroxidation...
July 26, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28755188/liver-cancer-in-tyrosinemia-type-1
#10
Willem G van Ginkel, Jan P Pennings, Francjan J van Spronsen
Hereditary Tyrosinemia type I (HT1) is clinically mainly characterised by severe liver disease. Most patients present in their first months of life with liver failure, but others can present later with issues of compensated cirrhosis, renal tubulopathy or acute intermittent porphyria. If patients survive the acute phase with liver failure or if they present later with compensated cirrhosis, they often develop hepatocellular carcinoma early but also later in life. The course of the disease changed after the introduction of 2-(2 nitro-4-3 trifluoro-methylbenzoyl)-1, 3-cyclohexanedione (NTBC), which blocks the tyrosine degradation pathway at an earlier step...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28754618/hepatoprotective-effect-of-hesperidin-in-hepatocellular-carcinoma-involvement-of-wnt-signaling-pathways
#11
Randa A Zaghloul, Nehal M Elsherbiny, Hany I Kenawy, Amr El-Karef, Laila A Eissa, Mamdouh M El-Shishtawy
AIMS: Wnt3a and Wnt5a are ligands orchestrating the canonical and non-canonical pathways, respectively, with involvement in hepatocellular carcinoma (HCC). Hesperidin (HP) is a natural product found in citrus fruits and reputed for its antitumor activity. The present study aims to investigate the potential hepatoprotective effect of HP against thioacetamide (TAA)-induced HCC focusing on its potential role on Wnt3a and Wnt5a signaling pathways. MAIN METHODS: Forty rats were equally divided into groups; normal control, HP control (receiving HP, 150mg/kg/day), HCC (receiving TAA, 200mg/kg twice weekly for 14weeks) and HP-HCC (receiving HP and TAA)...
July 25, 2017: Life Sciences
https://www.readbyqxmd.com/read/28752441/pathophysiology-of-alpha-1-antitrypsin-deficiency-liver-disease
#12
Jeffrey H Teckman, Keith S Blomenkamp
Classical alpha-1 antitrypsin (a1AT) deficiency is an autosomal recessive disease associated with an increased risk of liver disease in adults and children, and with lung disease in adults (Teckman and Jain, Curr Gastroenterol Rep 16(1):367, 2014). The vast majority of the liver disease is associated with homozygosity for the Z mutant allele, the so-called PIZZ. These homozygous individuals synthesize large quantities of a1AT mutant Z protein in the liver, but the mutant protein folds improperly during biogenesis and approximately 85% of the molecules are retained within the hepatocytes rather than appropriately secreted...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28747554/kaempferol-induces-hepatocellular-carcinoma-cell-death-via-endoplasmic-reticulum-stress-chop-autophagy-signaling-pathway
#13
Haiqing Guo, Wei Lin, Xiangying Zhang, Xiaohui Zhang, Zhongjie Hu, Liying Li, Zhongping Duan, Jing Zhang, Feng Ren
Kaempferol is a flavonoid compound that has gained widespread attention due to its antitumor functions. However, the underlying mechanisms are still not clear. The present study investigated the effect of kaempferol on hepatocellular carcinoma and its underlying mechanisms. Kaempferol induced autophagy in a concentration- and time-dependent manner in HepG2 or Huh7 cells, which was evidenced by the significant increase of autophagy-related genes. Inhibition of autophagy pathway, through 3-methyladenine or Atg7 siRNA, strongly diminished kaempferol-induced apoptosis...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28747012/immunohistochemical-and-biochemical-alterations-following-administration-of-proanthocyanidin-extract-in-rats-hepatocellular-carcinoma
#14
Aya A Sherif, Somaia Z Abdelhalim, Elsayed I Salim
Grape seed proanthocyanidin extract (GSPE) is known to be effective on broad spectrum of biological pathways in living organisms including oxidative stress. The present study aimed to investigate the effects of proanthocyanidin on preneoplastic lesions and liver cancer induced in rats by Diethylnitrosamine (DEN). 7-8 Week old male Sprague Dawley (S.D.) rats were divided into six groups: The 1st group received no treatment and were -ve controls, the 2nd were treated with a single dose of DEN 200mg/kg intraperitoneally (i...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28745078/hair-cortisol-in-relation-to-acute-and-post-traumatic-stress-symptoms-in-children-and-adolescents
#15
Joana Straub, Lena Marie Klaubert, Susann Schmiedgen, Clemens Kirschbaum, Lutz Goldbeck
BACKGROUND: We report on the preliminary results of two independent studies that (1) compare the hair cortisol concentrations (HCC) of healthy controls with patients displaying post-traumatic stress symptoms (PTSS, study 1+2), (2) investigate whether pre-trauma HCC are predictive for the development of acute stress symptoms (ASS) and PTSS (study 1) and (3) determine whether HCC correlate with PTSS in a clinical sample of children (study 2). METHODS: In study 1, the clinical symptoms of 35 minors were examined one (T1) and seven weeks (T2) after surgery following an accident...
July 26, 2017: Anxiety, Stress, and Coping
https://www.readbyqxmd.com/read/28743957/ubiquitin-specific-protease-21-stabilizes-brca2-to-control-dna-repair-and-tumor-growth
#16
Jinping Liu, Alex Kruswick, Hien Dang, Andy D Tran, So Mee Kwon, Xin Wei Wang, Philipp Oberdoerffer
Tumor growth relies on efficient DNA repair to mitigate the detrimental impact of DNA damage associated with excessive cell division. Modulating repair factor function, thus, provides a promising strategy to manipulate malignant growth. Here, we identify the ubiquitin-specific protease USP21 as a positive regulator of BRCA2, a key mediator of DNA repair by homologous recombination. USP21 interacts with, deubiquitinates and stabilizes BRCA2 to promote efficient RAD51 loading at DNA double-strand breaks. As a result, depletion of USP21 decreases homologous recombination efficiency, causes an increase in DNA damage load and impairs tumor cell survival...
July 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28730823/pathophysiological-analysis-of-the-progression-of-hepatic-lesions-in-stam-mice
#17
T Saito, M Muramatsu, Y Ishii, Y Saigo, T Konuma, Y Toriniwa, K Miyajima, T Ohta
Nonalcoholic steatohepatitis (NASH) is a current health issue since the disease often leads to hepatocellular carcinoma; however, the pathogenesis of the disease has still not been fully elucidated. In this study, we investigated the pathophysiological changes observed in hepatic lesions in STAM mice, a novel NASH model. STAM mice, high fat-diet (HFD) fed mice, and streptozotocin (STZ) treated mice were prepared, and changes over time, such as biological parameters, mRNA expression, and histopathological findings, were evaluated once animal reached 5, 7, and 10 weeks of age...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28720948/extracts-of-mauritian-carica-papaya-var-solo-protect-sw872-and-hepg2-cells-against-hydrogen-peroxide-induced-oxidative-stress
#18
Jhoti Somanah, Emmanuel Bourdon, Theeshan Bahorun
In line with literature documenting the pluripotent activities of tropical fruits, this study evaluated the antioxidant effects of Carica papaya fruit extracts at cellular level. Investigations using cellular models of oxidative stress provided complementary evidence of the antioxidant activities of papaya fruit. At 2 mg dry weight ml(-1), extracts of seed from ripe and unripe fruit significantly reduced oxidative stress levels within human pre-adipocytes (SW872) and hepatocellular carcinoma cells (HepG2) exposed to hydrogen peroxide (H2O2)...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720429/stable-isotope-based-flux-studies-in-nonalcoholic-fatty-liver-disease
#19
REVIEW
Arthur McCullough, Stephen Previs, Takhar Kasumov
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease and is associated with the worldwide epidemics of obesity, diabetes and cardiovascular diseases. NAFLD ranges from benign fat accumulation in the liver (steatosis) to non-alcoholic steatohepatitis (NASH), and cirrhosis which can progress to hepatocellular carcinoma and liver failure. Mass spectrometry and magnetic resonance spectroscopy-coupled stable isotope-based flux studies provide new insights into the understanding of NAFLD pathogenesis and the disease progression...
July 15, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28720064/evaluation-of-the-antitumor-activity-of-platinum-nanoparticles-in-the-treatment-of-hepatocellular-carcinoma-induced-in-rats
#20
Amina Medhat, Somaya Mansour, Sawsan El-Sonbaty, Eman Kandil, Mustafa Mahmoud
This study aimed to evaluate the antitumor activity of platinum nanoparticles compared with cis-platin both in vitro and in vivo in the treatment of hepatocellular carcinoma induced in rats. The treatment efficacy of platinum nanoparticles was evaluated by measuring antioxidant activities against oxidative stress caused by diethylnitrosamine in liver tissue. The measurements included reduced glutathione content and superoxide dismutase activity, as well as malondialdehyde level. Liver function tests were also determined, in addition to the evaluation of serum alpha-fetoprotein, caspase-3, and cytochrome c in liver tissue...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
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