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https://www.readbyqxmd.com/read/29684911/high-throughput-simultaneous-quantitation-of-hemoglobin-adducts-of-acrylamide-glycidamide-and-ethylene-oxide-using-uhplc-ms-ms
#1
Min Yang, Tunde Frame, Chui Tse, Hubert W Vesper
Ethylene oxide (EO), acrylamide (AA) and glycidamide (GA) exposures are associated with mammary tumors in animals. Currently available information about human exposure to these chemicals is limited creating the need for analytical methods to assess their exposure. We developed a sensitive ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method to simultaneously quantitate hemoglobin (Hb) N-terminal valine adducts of AA (HbAA), GA (HbGA), and EO (HbEO) using modified Edman reaction...
April 3, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29684875/toxicoproteomic-analysis-of-human-lung-epithelial-cells-exposed-to-steel-industry-ambient-particulate-matter-pm-reveals-possible-mechanism-of-pm-related-carcinogenesis
#2
S Senthil Kumar, P Muthuselvam, V Pugalenthi, N Subramanian, K M Ramkumar, T Suresh, T Suzuki, P Rajaguru
Toxicoproteomic analysis of steel industry ambient particulate matter (PM) that contain high concentrations of PAHs and metals was done by treating human lung cancer cell-line, A549 and the cell lysates were analysed using quantitative label-free nano LC-MS/MS. A total of 18,562 peptides representing 1576 proteins were identified and quantified, with 196 proteins had significantly altered expression in the treated cells. Enrichment analyses revealed that proteins associated to redox homeostsis, metabolism, and cellular energy generation were inhibited while, proteins related to DNA damage and repair and other stresses were over expressed...
April 20, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29684851/mitochondrial-dna-content-reduction-induces-aerobic-glycolysis-and-reversible-resistance-to-drug-induced-apoptosis-in-sw480-colorectal-cancer-cells
#3
Jing-Jing Mou, Jin Peng, Ying-Ying Shi, Na Li, You Wang, Yuan Ke, Yun-Feng Zhou, Fu-Xiang Zhou
Mutations and reductions in mitochondrial DNA (mtDNA), which are frequent in human tumors, may contribute to enhancing their malignant phenotypes. However, the effects of mtDNA abnormalities in colorectal cancer remain largely unknown. In this study, mtDNA-reduced cell model was established by partial depletion of mtDNA in SW480 cells and the effects of mtDNA reduction in colorectal cancer cells were investigated. We found that mtDNA-reduced cells had enhanced glucose uptake and generated markedly higher level of lactate...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684818/glut1-protects-prostate-cancer-cells-from-glucose-deprivation-induced-oxidative-stress
#4
Pedro Gonzalez-Menendez, David Hevia, Rebeca Alonso-Arias, Alejandro Alvarez-Artime, Aida Rodriguez-Garcia, Sandrina Kinet, Ivan Gonzalez-Pola, Naomi Taylor, Juan C Mayo, Rosa M Sainz
Glucose, chief metabolic support for cancer cell survival and growth, is mainly imported into cells by facilitated glucose transporters (GLUTs). The increase in glucose uptake along with tumor progression is due to an increment of facilitative glucose transporters as GLUT1. GLUT1 prevents cell death of cancer cells caused by growth factors deprivation, but there is scarce information about its role on the damage caused by glucose deprivation, which usually occurs within the core of a growing tumor. In prostate cancer (PCa), GLUT1 is found in the most aggressive tumors, and it is regulated by androgens...
April 12, 2018: Redox Biology
https://www.readbyqxmd.com/read/29684791/the-role-of-promyelocytic-leukemia-protein-in-steatosis-associated-hepatic-tumors-related-to-chronic-hepatitis-b-virus-infection
#5
Yih-Lin Chung, Mei-Ling Wu
The persistence of hepatitis B surface antigen (HBsAg) is a risk factor for the development of steatosis-associated tumors in chronic hepatitis B virus (HBV) infection, yet little is known about the metabolic link with this factor. We correlated HBV-related pathogenesis in genetically engineered mice and human carriers with metabolic proteomics and lipogenic gene expression profiles. The immunohistochemistry showed that the promyelocytic leukemia protein (PML, a tumor suppressor involved in genome maintenance and fatty acid oxidation), being inversely influenced by the dynamic HBsAg levels from acute phase to seroclearance, appeared as a lipo-metabolic switch linking HBsAg-induced steatosis (lipogenesis) to HBsAg-lost fat-burning hepatocarcinogenesis (lipolysis)...
April 20, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29684618/everolimus-is-a-new-anti-cancer-molecule-metabolic-side-effects-as-lipid-disorders-and-hyperglycemia
#6
REVIEW
L Morviducci, F Rota, L Rizza, P Di Giacinto, S Ramponi, M R Nardone, C Tubili, A Lenzi, P Zuppi, R Baldelli
In the last few years, molecular targeted therapies have replaced traditional cytotoxic chemotherapy in the fight against many cancers to the extent that our understanding of tumor biology has become more sophisticated. This shift has markedly changed adverse event profiles, compared to cytotoxic chemotherapy, affecting a diverse range of organ systems. Everolimus was approved by the FDA in 2011 for the treatment of progressive pancreatic NE tumors (Yao, 2011; Jensenn, 2012). It is an inhibitor of mammalian target of rapamycin (mTOR) and exhibits antitumor activity via disruption of various signaling pathways and it's used in the treatment of advanced renal cell cancer, breast cancer and neuroendocrine tumors (NET); it's used also as anti-rejection agent for transplantation but with lower doses for anti-rejection (1...
April 20, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29684520/phosphate-toxicity-and-tumorigenesis
#7
REVIEW
Ronald B Brown, Mohammed S Razzaque
In this brief opinion article, we briefly summarized evidence that cellular phosphate burden from phosphate toxicity is a pathophysiological determinant of cancer cell growth. Tumor cells express more phosphate cotransporters and store more inorganic phosphate than normal cells, and dysregulated phosphate homeostasis is associated with the genesis of various human tumors. High dietary phosphate consumption causes the growth of lung and skin tumors in experimental animal models. Experimental studies show that excessive phosphate burden induces growth-promoting cell signaling, stimulates neovascularization, and is associated with chromosome instability and metastasis...
April 20, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29684339/sorafenib-induced-tumor-lysis-syndrome-in-a-patient-with-metastatic-hepatocellular-carcinoma
#8
Sardar Zakariya Imam, Mohammad Faizan Zahid, Muhammad Asad Maqbool
Tumor lysis syndrome is a potentially lethal complication of chemotherapy, usually associated with aggressive hematologic malignancies. We describe the case of a young patient with metastatic hepatocellular cancer who developed rapid and fatal tumor lysis syndrome following initiation of sorafenib therapy. Although rare with sorafenib therapy for hepatocellular carcinoma, tumor lysis syndrome is serious complication. Patients with a high burden of disease at therapy initiation should have their metabolic parameters measured prior to starting therapy and closely followed for the first 1-2 weeks while being treated...
April 17, 2018: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/29683930/importance-of-18f-fdg-pet-ct-to-select-patients-with-nonresectable-colorectal-liver-metastases-for-liver-transplantation
#9
Harald Grut, Mona-Elisabeth Revheim, Pål-Dag Line, Svein Dueland
OBJECTIVE: The aim of this study was to evaluate fluorine-18-fluorodeoxyglucose (F-FDG) PET/CT for the selection of patients with nonresectable colorectal liver metastases (NCLM) for liver transplantation (LT). In the secondary cancer study, we reported an improved 5-year overall survival in patients treated with LT for NCLM (56%) compared with chemotherapy (9%). However, many patients were rejected for LT owing to the detection of extrahepatic disease at preoperative imaging. PATIENTS AND METHODS: F-FDG PET/CT and contrast-enhanced computed tomography (ceCT) examinations before tentative LT for NCLM were assessed, and findings contraindicating LT were registered...
April 20, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29683929/18f-fdg-pet-ct-in-the-evaluation-of-cancer-cervix-where-do-we-stand-today
#10
Shanmuga S Palaniswamy, Chaitanya R Borde, Padma Subramanyam
The incidence of gynecological malignancies is on the rise partly because of the availability of screening programmes, awareness, higher technological advancements, and availability of better medical care. Early diagnosis of any malignancy leads to prompt treatment. Use of 18Fluorine-Fluorodeoxyglucose (F-FDG) PET/CT in the treatment and follow-up of patients with Ca cervix considerably improves patient management. The primary diagnosis of Ca cervix is made either by biopsy of a visible tumor on the cervix or by a cone biopsy of a nonvisible malignant cervical focus...
April 20, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29683683/sequentially-responsive-therapeutic-peptide-assembling-nanoparticles-for-dual-targeted-cancer-immunotherapy
#11
Keman Cheng, Yanping Ding, Ying Zhao, Shefang Ye, Xiao Zhao, Yinlong Zhang, Tianjiao Ji, Huanhuan Wu, Bin Wang, Gregory J Anderson, Lei Ren, Guangjun Nie
Combination therapeutic regimen is becoming a primary direction for current cancer immunotherapy to broad the antitumor response. Functional nanomaterials offer great potential for steady co-delivery of various drugs, especially small molecules, therapeutic peptides, and nucleic acids, thereby realizing controllable drug release, increase of drug bioavailability and reduction of adverse effects. Herein, a therapeutic peptide assembling nanoparticle that can sequentially respond to dual stimuli in the tumor extracellular matrix was designed for tumor-targeted delivery and on-demand release of a short D-peptide antagonist of programmed cell death-ligand 1 (D PPA-1) and an inhibitor of idoleamine 2, 3-dioxygenase (NLG919)...
April 23, 2018: Nano Letters
https://www.readbyqxmd.com/read/29683499/the-role-of-androgens-on-periodontal-repair-in-female-rats
#12
João Paulo Steffens, Luis Carlos Leal Santana, Jonleno Coutinho Paiva Pitombo, Daniel Olivio Ribeiro, Maria Carolina Costa Albaricci, Stephanie von Stein Cubas Warnavin, Alpdogan Kantarci, Luis Carlos Spolidorio
BACKGROUND: Testosterone replacement enhances cognitive function and musculoskeletal health in postmenopausal women. However, the biological role of testosterone on inflammation and bone metabolism in females is not well understood. Our objective was to measure the impact of androgens and their receptors on periodontal tissues during periodontal repair in female rats. METHODS: Seventy female Holtzman rats were divided into seven groups (n = 10/group): negative control; repair control; androgen receptor antagonist (flutamide, 50 mg/kg, every other day); estrogen receptor antagonist (fulvestrant, 1...
April 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29683083/indoxyl-sulfate-induces-apoptosis-and-hypertrophy-in-human-kidney-proximal-tubular-cells
#13
Robert J Ellis, David M Small, Keng Lim Ng, David A Vesey, Luis Vitetta, Ross S Francis, Glenda C Gobe, Christudas Morais
Indoxyl sulfate (IS) is a protein-bound uremic toxin that accumulates in patients with declining kidney function. Although generally thought of as a consequence of declining kidney function, emerging evidence demonstrates direct cytotoxic role of IS on endothelial cells and cardiomyocytes, largely through the expression of pro-inflammatory and pro-fibrotic factors. The direct toxicity of IS on human kidney proximal tubular epithelial cells (PTECs) remains a matter of debate. The current study explored the effect of IS on primary cultures of human PTECs and HK-2, an immortalized human PTEC line...
January 1, 2018: Toxicologic Pathology
https://www.readbyqxmd.com/read/29682517/dihydromyricetin-attenuates-tnf-%C3%AE-induced-endothelial-dysfunction-through-mir-21-mediated-ddah1-adma-no-signal-pathway
#14
Dafeng Yang, Shenglan Tan, Zhousheng Yang, Pei Jiang, Caie Qin, Qiong Yuan, Ruili Dang, Xiaoxia Yao, Jian Qu, Qiong Lu, Ping Xu, Bikui Zhang, Daxiong Xiang, Lei Chen
Accumulating studies demonstrate that dihydromyricetin (DMY), a compound extracted from Chinese traditional herb, Ampelopsis grossedentata , attenuates atherosclerotic process by improvement of endothelial dysfunction. However, the underlying mechanism remains poorly understood. Thus, the aim of this study is to investigate the potential mechanism behind the attenuating effects of DMY on tumor necrosis factor alpha- (TNF- α -) induced endothelial dysfunction. In response to TNF- α , microRNA-21 (miR-21) expression was significantly increased in human umbilical vein endothelial cells (HUVECs), in line with impaired endothelial dysfunction as evidenced by decreased tube formation and migration, endothelial nitric oxide synthase (eNOS) (ser1177) phosphorylation, dimethylarginine dimethylaminohydrolases 1 (DDAH1) expression and metabolic activity, and nitric oxide (NO) concentration as well as increased asymmetric dimethylarginine (ADMA) levels...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29682162/metabolic-alterations-in-a-slow-paced-model-of-pancreatic-cancer-induced-wasting
#15
Elisabeth Wyart, Simone Reano, Myriam Y Hsu, Dario Livio Longo, Mingchuan Li, Emilio Hirsch, Nicoletta Filigheddu, Alessandra Ghigo, Chiara Riganti, Paolo Ettore Porporato
Cancer cachexia is a devastating syndrome occurring in the majority of terminally ill cancer patients. Notably, skeletal muscle atrophy is a consistent feature affecting the quality of life and prognosis. To date, limited therapeutic options are available, and research in the field is hampered by the lack of satisfactory models to study the complexity of wasting in cachexia-inducing tumors, such as pancreatic cancer. Moreover, currently used in vivo models are characterized by an explosive cachexia with a lethal wasting within few days, while pancreatic cancer patients might experience alterations long before the onset of overt wasting...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29681779/prognostic-value-of-volume-based-positron-emission-tomography-computed-tomography-in-nasopharyngeal-carcinoma-patients-after-comprehensive-therapy
#16
Yueli Tian, Khamis Hassan Bakari, Shanshan Liao, Xiaotian Xia, Xun Sun, Chunxia Qin, Yongxue Zhang, Xiaoli Lan
Objective: We assessed the prognostic value of standardized uptake value (SUV) and volume-based methods including whole-body metabolic tumor volume (WBMTV) and whole-body total lesion glycolysis (WBTLG) using 18 F-fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) of patients with nasopharyngeal carcinoma (NPC) after therapy. Methods: A total of 221 posttherapy NPC cases were enrolled, all of whom had undergone PET/CT scanning and follow-up in this retrospective study...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29680775/numb-chin-syndrome-a-reflection-of-malignancy-or-a-harbinger-of-mronj-a-multicenter-experience
#17
Leonzio Fortunato, Massimo Amato, Michele Simeone, Francesco Bennardo, Selene Barone, Amerigo Giudice
INTRODUCTION: Numb chin syndrome (NCS) or mental neuropathy (MN) is a disorder characterized by sensory neuropathy on the distribution of the inferior alveolar nerve or mental nerve. The most frequent causes are of odontogenic origin (infections, wrong therapies). Other etiologies are related to primary tumor, metastasis, osteoradionecrosis and medication-related osteonecrosis of the jaw (MRONJ). The aim of this study is to highlight the clinical importance of NCS as one of the first symptoms of cancer or as consequence of drug therapy...
April 19, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29680449/modeling-tumor-growth-inhibition-and-toxicity-outcome-after-administration-of-anticancer-agents-in-xenograft-mice-a-dynamic-energy-budget-deb-approach
#18
N Terranova, E M Tosca, E Borella, E Pesenti, M Rocchetti, P Magni
Host features, such as cell proliferation rates, caloric intake, metabolism and energetic conditions, significantly influence tumor growth; at the same time, tumor growth may have a dramatic impact on the host conditions. For example, in clinics, at certain stages of the tumor growth, cachexia (body weight reduction) may become so relevant to be considered as responsible for around 20% of cancer deaths. Unfortunately, anticancer therapies may also contribute to the development of cachexia due to reduced food intake (anorexia), commonly observed during the treatment periods...
April 19, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29680254/correlation-between-tumor-metabolism-and-semiquantitative-perfusion-magnetic-resonance-imaging-metrics-in-non-small-cell-lung-cancer
#19
Sang Ho Lee, Andreas Rimner, Emily Gelb, Joseph O Deasy, Margie A Hunt, John L Humm, Neelam Tyagi
PURPOSE: To correlate semiquantitative parameters derived from dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and 18 F-fluorodeoxyglucose positron emission tomography (18 F-FDG-PET) for non-small cell lung cancer (NSCLC). METHODS AND MATERIALS: Twenty-four NSCLC patients who underwent pretreatment 18 F-FDG-PET and DCE-MRI were analyzed. The maximum standardized uptake value (SUVmax) was measured from 18F-FDG-PET. Dynamic contrast-enhanced MRI was obtained on a 3T MRI scanner using 4-dimensional T1-weighted high-resolution imaging with a volume excitation sequence...
March 2, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29679509/pharmacokinetic-properties-of-wogonin-and-its-herb-drug-interactions-with-docetaxel-in-rats-with-mammary-tumors
#20
Ting Wang, Fangyi Long, Gang Jiang, Hong Cai, Qian Jiang, Kai Cheng, Zhiqiang Hu, Yuxi Wang
Docetaxel, frequently used for the treatment of breast cancer, is mainly metabolized via hepatic cytochrome P450 (CYP) 3A in humans and is also a substrate of P-glycoprotein (P-gp). Wogonin has been shown to be able to modulate the activities of CYPs and P-gp, and it could be served as an adjuvant chemotherapeutic agent. However, the impacts of co-administration of wogonin and docetaxel on their pharmacokinetics have not been studied for lacking analytical method of their simultaneous measurement. In the present study, we established an HPLC-MS/MS method for simultaneous measurement of wogonin and docetaxel in rat plasma, and it was then utilized to explore the pharmacokinetics of wogonin and the herb-drug interactions between wogonin and docetaxel after the combined administration in rats with mammary tumors...
April 21, 2018: Biomedical Chromatography: BMC
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