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https://www.readbyqxmd.com/read/28165392/sphingosine-kinase-1-involves-the-inhibitory-action-of-hif-1%C3%AE-by-chlorogenic-acid-in-hypoxic-du145-cells
#1
Myoung-Sun Lee, Seon-Ok Lee, Kyu-Ri Kim, Hyo-Jeong Lee
Hypoxia enhances cancer development in a solid tumor. Hypoxia-inducible factor-1 α (HIF-1α) is a transcription factor that is dominantly expressed under hypoxia in solid tumor cells and is a key factor that regulates tumor. HIF-1α regulates several target genes involved in many aspects of cancer progression, including angiogenesis, metastasis, anti-apoptosis and cell proliferation as well as imparts resistance to cancer treatment. In this study, we assessed Crataegus Pinnatifida Bunge var. typical Schneider ethanol extract (CPE) for its anti-cancer effects in hypoxia-induced DU145 human prostate cancer cell line...
February 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28133171/-gastric-cancer-diagnosed-with-metastasis-of-the-navel-sister-mary-joseph-s-nodule-a-case-report
#2
Tomohiro Katayama, Takaaki Ishii, Takeshi Tono, Yusuke Okubo, Koji Shinozaki, Yasuhito Kawasaki, Shuho Senba, Seiji Yasuda, Minoru Otsuru
A woman in her 60s was admitted to our hospital with pain and induration of the navel. She was diagnosed with gastric cancer with metastasis to the navel and underwent total gastrectomy and navel extraction. Because disseminated nodules were detected in the Douglas pouch and sigmoid colon, sigmoidectomy was performed to prevent bowel obstruction. The navel tumor was histologically diagnosed as a metastasis of the gastric cancer. One month after surgery, a chest skin tumor, which was also a skin metastasis of the gastric cancer[T4aN3M1(SKI, OTH)H0P1, fStage IV ], was detected, and tumor enucleation was performed...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28115165/repression-of-smad3-by-stat3-and-c-ski-snon-induces-gefitinib-resistance-in-lung-adenocarcinoma
#3
Yojiro Makino, Jeong-Hwan Yoon, Eunjin Bae, Mitsuyasu Kato, Keiji Miyazawa, Tatsuo Ohira, Norihiko Ikeda, Masahiko Kuroda, Mizuko Mamura
Cancer-associated inflammation develops resistance to the epidermal growth-factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) in non-small cell lung cancers (NSCLCs) harboring oncogenic EGFR mutations. Stat3-mediated interleukin (IL)-6 signaling and Smad-mediated transforming growth factor-β (TGF-β) signaling pathways play crucial regulatory roles in cancer-associated inflammation. However, mechanisms how these pathways regulate sensitivity and resistance to EGFR-TKI in NSCLCs remain largely undetermined...
January 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27922162/nonmelanoma-skin-cancer-in-mountain-guides-high-prevalence-and-lack-of-awareness-warrant-development-of-evidence-based-prevention-tools
#4
Alexander Zink, Elisabeth Koch, Florian Seifert, Markus Rotter, Christoph D Spinner, Tilo Biedermann
AIMS OF THE STUDY: Nonmelanoma skin cancer (NMSC) is the most common cancer in Switzerland and Europe. The main causative factor is exposure to ultraviolet radiation, which puts outdoor workers in general at a higher risk of developing NMSC than indoor workers. However, few studies have clinically examined the risk of developing NMSC to outdoor workers, especially mountain guides. We aimed to investigate the prevalence of NMSC and corresponding precancerous lesions, and the associated risk behaviour of mountain and ski guides in order to develop future prevention programmes...
2016: Swiss Medical Weekly
https://www.readbyqxmd.com/read/27909446/functional-toxicogenomic-profiling-expands-insight-into-modulators-of-formaldehyde-toxicity-in-yeast
#5
Matthew North, Brandon D Gaytán, Carlos Romero, Vanessa Y De La Rosa, Alex Loguinov, Martyn T Smith, Luoping Zhang, Chris D Vulpe
Formaldehyde (FA) is a commercially important chemical with numerous and diverse uses. Accordingly, occupational and environmental exposure to FA is prevalent worldwide. Various adverse effects, including nasopharyngeal, sinonasal, and lymphohematopoietic cancers, have been linked to FA exposure, prompting designation of FA as a human carcinogen by U.S. and international scientific entities. Although the mechanism(s) of FA toxicity have been well studied, additional insight is needed in regard to the genetic requirements for FA tolerance...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27904661/a-novel-sphingosine-kinase-1-inhibitor-ski-5c-induces-cell-death-of-wilms-tumor-cells-in-vitro-and-in-vivo
#6
Zhi-Heng Li, Yan-Fang Tao, Li-Xiao Xu, He Zhao, Xiao-Lu Li, Fang Fang, Yi Wu, Jun Lu, Yan-Hong Li, Wei-Wei Du, Jun-Li Ren, Yi-Ping Li, Yun-Yun Xu, Xing Feng, Jian Wang, Wei-Qi He, Jian Pan
Sphingosine kinase 1 (SphK1) is over-expressed in many cancers and therefore serves as a biomarker for cancer prognosis. SKI-5C is a new SphK1 inhibitor, and until now its molecular function in Wilms' tumor cells remained unknown. Here, using CCK-8 and nude mice experiments we assessed cell growth in Wilms' tumor cell lines (SK-NEP-1 and G401) in vitro and in vivo. We demonstrated that SphK1 is highly expressed in SK-NEP-1 and G401 cells, and through annexin V/propidium iodide staining and flow cytometry analysis, we detected cell apoptosis...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27902484/depletion-of-mitochondrial-reactive-oxygen-species-downregulates-epithelial-to-mesenchymal-transition-in-cervical-cancer-cells
#7
Galina Shagieva, Lidiya Domnina, Olga Makarevich, Boris Chernyak, Vladimir Skulachev, Vera Dugina
In the course of cancer progression, epithelial cells often acquire morphological and functional characteristics of mesenchymal cells, a process known as epithelial-to-mesenchymal transition (EMT). EMT provides epithelial cells with migratory, invasive, and stem cell capabilities. Reactive oxygen species produced by mitochondria (mtROS) could be of special importance for pro-tumorigenic signaling and EMT.In our study, we used mitochondria-targeted antioxidant SkQ1 to lower the mtROS level and analyze their role in the regulation of the actin cytoskeleton, adhesion junctions, and signaling pathways critical for tumorigenesis of cervical carcinomas...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27734340/ski-modulate-the-characteristics-of-pancreatic-cancer-stem-cells-via-regulating-sonic-hedgehog-signaling-pathway
#8
Libin Song, Xiangyuan Chen, Song Gao, Chenyue Zhang, Chao Qu, Peng Wang, Luming Liu
Evidence from in vitro and in vivo studies shows that Ski may act as both a tumor proliferation-promoting factor and a metastatic suppressor in human pancreatic cancer and also may be a therapeutic target of integrative therapies. At present, pancreatic cancer stem cells (CSCs) are responsible for tumor recurrence accompanied by resistance to conventional therapies. Sonic hedgehog (Shh) signaling pathway is found to be aberrantly activated in CSCs. The objectives of this study were to investigate the role of Ski in modulating pancreatic CSCs and to examine the molecular mechanisms involved in pancreatic cancer treatment both in vivo and in vitro...
October 12, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/27729078/chalepin-isolated-from-ruta-angustifolia-l-pers-induces-mitochondrial-mediated-apoptosis-in-lung-carcinoma-cells
#9
Jaime Stella Moses Richardson, Gautam Sethi, Guan Serm Lee, Sri Nurestri Abdul Malek
BACKGROUND: Cancer has been one of the leading causes of mortality in this era. Ruta angustifolia L. Pers has been traditionally used as an abortifacient, antihelmintic, emmenagogue and ophthalmic. In Malaysia and Singapore, the local Chinese community used it for the treatment of cancer. METHODS: In this study, the methanol and fractionated extracts (hexane, chloroform, ethyl acetate and water) of R. angustifolia were tested for its cytotoxicity using the sulforhodamide (SRB) cytotoxicity assay against HCT-116, A549, Ca Ski and MRC5 cell lines...
October 12, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27435765/-phosphorylation-of-ezrin-tyr477-is-critical-in-invasion-of-breast-cancer-cells-stimulated-by-precursor-of-nerve-growth-factor
#10
Fu-Xi Li, Wen-Feng Shao, Rui Tang, Xiao-Ran Yu, Qiao-Sheng Wen, Yan-Lin Yu, Jing-Bo Xiong
OBJECTIVE: To investigate the effect of precursor of nerve growth factor (proNGF) in promoting invasion of breast cancer cells and its relation with ezrin expression and phosphorylation of ezrin Thr567 and Tyr477. METHODS: Human breast cancer cell lines MDA-MB-231 and MCF-7 were stimulated by gradient concentrations of proNGF (0, 2.5, 5 and 10 ng/mL) for 16 h, and the invasion of the cells was assessed with Transwell assay. The expression of ezrin and the phosphorylation of ezrin Thr567 and ezrin Tyr477 in the treated cells were examined by Western blotting...
June 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27430247/snon-suppresses-tgf-%C3%AE-induced-epithelial-mesenchymal-transition-and-invasion-of-bladder-cancer-in-a-tif1%C3%AE-dependent-manner
#11
Xinbao Yin, Chuanshen Xu, Xueping Zheng, Huiyang Yuan, Ming Liu, Yue Qiu, Jun Chen
The transcriptional regulator SnoN (also known as SKI-like proto-oncogene, SKIL), a member of the Ski family, has been reported to influence epithelial-mesenchymal transition (EMT) in response to TGF-β. In the present study, we investigated the role of SnoN in bladder cancer (BC). Differential expression of SnoN was not detected in BC tissues compared with that noted in adjacent non-cancerous tissues. SnoN was upregulated in response to TGF-β treatment, but had no effect on the TGF-β pathway, which may be explained by the low level of SnoN SUMOylation...
September 2016: Oncology Reports
https://www.readbyqxmd.com/read/27137215/identification-of-key-regulators-of-pancreatic-cancer-progression-through-multidimensional-systems-level-analysis
#12
Deepa Rajamani, Manoj K Bhasin
BACKGROUND: Pancreatic cancer is an aggressive cancer with dismal prognosis, urgently necessitating better biomarkers to improve therapeutic options and early diagnosis. Traditional approaches of biomarker detection that consider only one aspect of the biological continuum like gene expression alone are limited in their scope and lack robustness in identifying the key regulators of the disease. We have adopted a multidimensional approach involving the cross-talk between the omics spaces to identify key regulators of disease progression...
May 3, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27045164/health-related-quality-of-life-during-bosutinib-ski-606-therapy-in-patients-with-advanced-chronic-myeloid-leukemia-after-imatinib-failure
#13
Jennifer Whiteley, Arlene Reisman, Mark Shapiro, JorgeE Cortes, David Cella
OBJECTIVES: The tyrosine kinase inhibitor (TKI) bosutinib has demonstrated activity in patients with advanced phase chronic myeloid leukemia (CML), but effects on health-related quality of life (HRQoL) remain unexplored. This study evaluated HRQoL in advanced CML patients receiving bosutinib in an ongoing phase 2 study following resistance or intolerance to prior imatinib therapy. METHODS: This analysis included data from 76 accelerated-phase (AP) and 64 blast-phase (BP) patients resistant/intolerant to prior imatinib with or without prior exposure to other TKIs...
August 2016: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/26992657/the-metabolic-profiles-of-pterin-compounds-as-potential-biomarkers-of-bladder-cancer-integration-of-analytical-based-approach-with-biostatistical-methodology
#14
Piotr Kośliński, Emilia Daghir-Wojtkowiak, Paulina Szatkowska-Wandas, Marcin Markuszewski, Michał J Markuszewski
Cancer disease is the second leading cause of death across the world. The analysis of potential biomarkers of cancer can be useful in cancer screening or cancer diagnosis, and may provide valuable information on the disease risk and progression. Pterin compounds have been studied as candidates of potential biomarkers as their elevated levels have been reported in various cancer diseases. The objective of the study was to compare the profiles of six pterin compounds in urine of 35 healthy subjects and 46 patients diagnosed of bladder cancer with the use of HPLC coupled with fluorimetric detection...
August 5, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/26983446/the-impact-of-oophorectomy-on-survival-after-breast-cancer-in-brca1-positive-breast-cancer-patients
#15
T Huzarski, T Byrski, J Gronwald, C Cybulski, O Oszurek, M Szwiec, K Gugała, M Stawicka, Z Morawiec, T Mierzwa, M Falco, H Janiszewska, E Kilar, E Marczyk, B Kozak-Klonowska, M Siołek, D Surdyka, R Wiśniowski, M Posmyk, P Domagała, P Sun, J Lubiński, S A Narod
The aim of the study is to identify treatments which predict survival for women with a BRCA1 mutation, including oophorectomy and chemotherapy. 476 women with stage I to stage III breast cancer who carried a BRCA1 mutation were followed from diagnosis until April 2015. Information on treatment was obtained from chart review and patient questionnaires. Dates of death were obtained from the Poland vital statistics registry. Survival curves were compared for different subgroups according to treatment received...
April 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/26969570/spinal-tuberculosis-with-severe-neurological-symptoms-as-a-complication-of-intravesical-bcg-therapy-for-carcinoma-of-the-bladder
#16
Jerzy Białecki, Mirosława Nowak-Misiak, Kazimierz Rąpała, Wojciech Marczyński, Gracjan Suchodolski, Aleksandra Truszczyńska
INTRODUCTION: Non-invasive bladder cancer is effectively treated with intravesical BCG therapy. The administration of the BCG vaccine is to destroy the neoplastic lesion or prevent further recurrences. The activity of the vaccine involves boosting the immune system through the stimulation of the inflammation in the bladder. Adverse reactions after this immunotherapy are rare. The aim of the study was to present complications in the form of spinal tuberculosis and serious neurological symptoms that occurred during intravesical BCG immunotherapy for carcinoma of the bladder...
2016: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/26959551/methods-for-preliminary-determination-of-pemetrexed-in-macromolecular-drug-carrier-systems
#17
Jarosław Ciekot, Tomasz Marek Goszczyński, Janusz Boratyński
Pemetrexed (PMX) is an antifolate drug utilized in the treatment of non-small cell lung cancer. For studies of potential macromolecular carriers for PMX, fast and precise methods were developed to determine the bound and free drug contained in investigated conjugate preparations. The analysis of the total amount of PMX in conjugates was based on absorption spectrophotometry. The linearity was found in the range of 4.697-46.97 μmol L(-1) PMX. The limit of quantitation was 1.070 μmol L(-1). The method for the analysis of unbound PMX was based on size-exclusion chromatography and detection at 225 nm...
March 2016: Acta Pharmaceutica
https://www.readbyqxmd.com/read/26948869/the-hmgb1-protein-induces-a-metabolic-type-of-tumour-cell-death-by-blocking-aerobic-respiration
#18
Georg Gdynia, Sven W Sauer, Jürgen Kopitz, Dominik Fuchs, Katarina Duglova, Thorsten Ruppert, Matthias Miller, Jens Pahl, Adelheid Cerwenka, Markus Enders, Heimo Mairbäurl, Marcin M Kamiński, Roland Penzel, Christine Zhang, Jonathan C Fuller, Rebecca C Wade, Axel Benner, Jenny Chang-Claude, Hermann Brenner, Michael Hoffmeister, Hanswalter Zentgraf, Peter Schirmacher, Wilfried Roth
The high-mobility group box 1 (HMGB1) protein has a central role in immunological antitumour defense. Here we show that natural killer cell-derived HMGB1 directly eliminates cancer cells by triggering metabolic cell death. HMGB1 allosterically inhibits the tetrameric pyruvate kinase isoform M2, thus blocking glucose-driven aerobic respiration. This results in a rapid metabolic shift forcing cells to rely solely on glycolysis for the maintenance of energy production. Cancer cells can acquire resistance to HMGB1 by increasing glycolysis using the dimeric form of PKM2, and employing glutaminolysis...
March 7, 2016: Nature Communications
https://www.readbyqxmd.com/read/26944438/sphk1-inhibitor-ski-ii-inhibits-the-proliferation-of-human-hepatoma-hepg2-cells-via-the-wnt5a-%C3%AE-catenin-signaling-pathway
#19
Hong Liu, Cai-Xia Zhang, Yan Ma, Hong-Wei He, Jia-Ping Wang, Rong-Guang Shao
AIM: Sphingosine 1-phosphate (S1P) promotes cell growth, proliferation and survival. Sphingosine kinase 1 (SphK1), which converts sphingosine to S1P, is a key promoter in cancer. We previously found that the SphK1 inhibitor II (SKI II), suppresses the cell growth and induces apoptosis in human hepatoma HepG2 cells. However, the precise regulatory mechanism and signaling pathway on SKI II inhibiting tumor growth remains unknown. MAIN METHODS: The expressions of β-catenin and related molecules of Wnt/β-catenin signal were detected by western blot in HepG2 cells...
April 15, 2016: Life Sciences
https://www.readbyqxmd.com/read/26934645/proteasomal-degradation-of-sphingosine-kinase-1-and-inhibition-of-dihydroceramide-desaturase-by-the-sphingosine-kinase-inhibitors-ski-or-abc294640-induces-growth-arrest-in-androgen-independent-lncap-ai-prostate-cancer-cells
#20
Melissa McNaughton, Melissa Pitman, Stuart M Pitson, Nigel J Pyne, Susan Pyne
Sphingosine kinases (two isoforms termed SK1 and SK2) catalyse the formation of the bioactive lipid sphingosine 1-phosphate. We demonstrate here that the SK2 inhibitor, ABC294640 (3-(4-chlorophenyl)-adamantane-1-carboxylic acid (pyridin-4-ylmethyl)amide) or the SK1/SK2 inhibitor, SKi (2-(p-hydroxyanilino)-4-(p-chlorophenyl)thiazole)) induce the proteasomal degradation of SK1a (Mr = 42 kDa) and inhibit DNA synthesis in androgen-independent LNCaP-AI prostate cancer cells. These effects are recapitulated by the dihydroceramide desaturase (Des1) inhibitor, fenretinide...
March 29, 2016: Oncotarget
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