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https://www.readbyqxmd.com/read/28814819/marinocyanins-cytotoxic-bromo-phenazinone-meroterpenoids-from-a-marine-bacterium-from-the-streptomycete-clade-mar4
#1
Ratnakar N Asolkar, Ahilya Singh, Paul R Jensen, William Aalbersberg, Brad K Carté, Klaus-D Feussner, Ramesh Subramani, Antonio DiPasquale, Arnold L Rheingold, William Fenical
Six cytotoxic and antimicrobial metabolites of a new bromo-phenazinone class, the marinocyanins A-F (1-6), were isolated together with the known bacterial metabolites 2-bromo-1-hydroxyphenazine (7), lavanducyanin (8, WS-9659A) and its chlorinated analog WS-9659B (9). These metabolites were purified by bioassay-guided fractionation of the extracts of our MAR4 marine actinomycete strains CNS-284 and CNY-960. The structures of the new compounds were determined by detailed spectroscopic methods and marinocyanin A (1) was confirmed by crystallographic methods...
April 20, 2017: Tetrahedron
https://www.readbyqxmd.com/read/28814670/mtg16-is-a-tumor-suppressor-in-colitis-associated-carcinoma
#2
Elizabeth M McDonough, Caitlyn W Barrett, Bobak Parang, Mukul K Mittal, J Joshua Smith, Amber M Bradley, Yash A Choksi, Lori A Coburn, Sarah P Short, Joshua J Thompson, Baolin Zhang, Shenika V Poindexter, Melissa A Fischer, Xi Chen, Jiang Li, Frank L Revetta, Rishi Naik, M Kay Washington, Michael J Rosen, Scott W Hiebert, Keith T Wilson, Christopher S Williams
MTG16 is a member of the myeloid translocation gene (MTG) family of transcriptional corepressors. While MTGs were originally identified in chromosomal translocations in acute myeloid leukemia, recent studies have uncovered a role in intestinal biology. For example, Mtg16-/- mice have increased intestinal proliferation and are more sensitive to intestinal injury in colitis models. MTG16 is also underexpressed in patients with moderate/severe ulcerative colitis. Based on these findings, we postulated that MTG16 might protect against colitis-associated carcinogenesis...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28814667/adrenergic-mediated-increases-in-inhba-drive-caf-phenotype-and-collagens
#3
Archana S Nagaraja, Robert L Dood, Guillermo Armaiz-Pena, Yu Kang, Sherry Y Wu, Julie K Allen, Nicholas B Jennings, Lingegowda S Mangala, Sunila Pradeep, Yasmin Lyons, Monika Haemmerle, Kshipra M Gharpure, Nouara C Sadaoui, Cristian Rodriguez-Aguayo, Cristina Ivan, Ying Wang, Keith Baggerly, Prahlad Ram, Gabriel Lopez-Berestein, Jinsong Liu, Samuel C Mok, Lorenzo Cohen, Susan K Lutgendorf, Steve W Cole, Anil K Sood
Adrenergic signaling is known to promote tumor growth and metastasis, but the effects on tumor stroma are not well understood. An unbiased bioinformatics approach analyzing tumor samples from patients with known biobehavioral profiles identified a prominent stromal signature associated with cancer-associated fibroblasts (CAFs) in those with a high biobehavioral risk profile (high Center for Epidemiologic Studies Depression Scale [CES-D] score and low social support). In several models of epithelial ovarian cancer, daily restraint stress resulted in significantly increased CAF activation and was abrogated by a nonspecific β-blocker...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28813148/chitosan-coated-cinnamon-oregano-loaded-solid-lipid-nanoparticles-to-augment-5-fluorouracil-cytotoxicity-for-colorectal-cancer-extracts-standardization-nanoparticles-optimization-and-cytotoxicity-evaluation
#4
Kamel M Kamel, Islam A Khalil, Mostafa E Rateb, Hosieny Elgendy, Seham Elhawary
This study aimed to coat lipid-based-nanocarriers with chitosan to encapsulate nutraceuticals, minimize opsonization and facilitate passive-targeting. Phase-one was concerned with standardization according to WHO. Qualitative-analysis using LC-HRMS/MS investigated the active-constituents especially reported cytotoxic-agents. Cinnamaldehyde and rosmarinic acid was selected to be quantified using HPLC. Phase-two was aimed to encapsulate both extracts in solid lipid nanoparticles (core) and chitosan (shell) to gain the advantages of both materials properties...
August 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28813102/terpene-esters-from-natural-products-synthesis-and-evaluation-of-cytotoxic-activity
#5
Mauricio M Victor, Jorge M David, Maria C K Sakukuma, Letícia V Costa-Lotufo, Andrea F Moura, Ana J Araújo
Natural steroids and triterpenes such as b-sitosterol, stigmasterol, lupeol, ursolic and betulinic acids were transformed into its hexanoic and oleic esters, to evaluate the influence of chemical modification towards the cytotoxic activities against tumor cells. The derivatives were evaluated against five tumor cell lines [OVCAR-8 (ovarian carcinoma); SF-295 (glioblastoma); HCT-116 (colon adenocarcinoma); HL-60 (leukemia); and PC-3 (prostate carcinoma)] and the results showed only betulinic acid hexyl ester exhibits cytotoxic potential activity...
August 14, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28812429/metastatic-colon-adenocarcinoma-has-a-significantly-elevated-expression-of-il-10-compared-to-primary-colon-adenocarcinoma-tumors
#6
Michelle H Townsend, Abigail M Felsted, Stephen R Piccolo, Richard A Robison, Kim L O'Neill
Classical anti-inflammatory cytokines are known to play a role in both cancer progression as well as cancer elimination. We evaluated the anti-inflammatory cytokines IL-10 and TGF-β in patients with colon adenocarcinoma and metastatic colon adenocarcinoma utilizing immunohistochemical assays to determine the expression of the cytokines between various malignant tissues. We found tissues stained with TGF-β showed no significant upregulation within malignant tumors when compared to normal tissue controls. We observed high levels of TGF-β presence in most tissues similar to GAPDH expression...
August 16, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28812131/dna-degrades-during-storage-in-formalin-fixed-and-paraffin-embedded-tissue-blocks
#7
Alice Guyard, Alice Boyez, Anaïs Pujals, Cyrielle Robe, Jeanne Tran Van Nhieu, Yves Allory, Julien Moroch, Odette Georges, Jean-Christophe Fournet, Elie-Serge Zafrani, Karen Leroy
Formalin-fixed paraffin-embedded (FFPE) tissue blocks are widely used to identify clinically actionable molecular alterations or perform retrospective molecular studies. Our goal was to quantify degradation of DNA occurring during mid to long-term storage of samples in usual conditions. We selected 46 FFPE samples of surgically resected carcinomas of lung, colon, and urothelial tract, of which DNA had been previously extracted. We performed a second DNA extraction on the same blocks under identical conditions after a median period of storage of 5...
August 15, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28811711/fibroblast-derived-cxcl12-sdf-1%C3%AE-promotes-cxcl6-secretion-and-co-operatively-enhances-metastatic-potential-through-the-pi3k-akt-mtor-pathway-in-colon-cancer
#8
Jia-Chi Ma, Xiao-Wen Sun, He Su, Quan Chen, Tian-Kang Guo, Yuan Li, Xiao-Chang Chen, Jin Guo, Zhen-Qiang Gong, Xiao-Dan Zhao, Jian-Bo Qi
AIM: To investigate the underlying mechanism by which CXCL12 and CXCL6 influences the metastatic potential of colon cancer and internal relation of colon cancer and stromal cells. METHODS: Western blotting was used to detect the expression of CXCL12 and CXCL6 in colon cancer cells and stromal cells. The co-operative effects of CXCL12 and CXCL6 on proliferation and invasion of colon cancer cells and human umbilical vein endothelial cells (HUVECs) were determined by enzyme-linked immunosorbent assay, and proliferation and invasion assays...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28811708/involvement-of-crf2-signaling-in-enterocyte-differentiation
#9
Benjamin Ducarouge, Marjolaine Pelissier-Rota, Rebecca Powell, Alain Buisson, Bruno Bonaz, Muriel Jacquier-Sarlin
AIM: To determine the role of corticotropin releasing factor receptor (CRF2) in epithelial permeability and enterocyte cell differentiation. METHODS: For this purpose, we used rat Sprague Dawley and various colon carcinoma cell lines (SW620, HCT8R, HT-29 and Caco-2 cell lines). Expression of CRF2 protein was analyzed by fluorescent immunolabeling in normal rat colon and then by western blot in dissociated colonic epithelial cells and in the lysates of colon carcinoma cell lines or during the early differentiation of HT-29 cells (ten first days)...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28808378/rutamarin-an-active-constituent-from-ruta-angustifolia-pers-induced-apoptotic-cell-death-in-the-ht29-colon-adenocarcinoma-cell-line
#10
Shafinah Ahmad Suhaimi, Sok Lai Hong, Sri Nurestri Abdul Malek
BACKGROUND: Ruta angustifolia Pers. is a perennial herb that is cultivated worldwide, including Southeast Asia, for the treatment of various diseases as traditional medicine. OBJECTIVE: The purpose of the study was to identify an active principle of R. angustifolia and to investigate its effect on the HT29 cell death. MATERIALS AND METHODS: The methanol and fractionated extracts (hexane, chloroform, ethyl acetate, and water) of R. angustifolia Pers...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28807849/danshen-improves-survival-of-patients-with-colon-cancer-and-dihydroisotanshinone-i-inhibit-the-proliferation-of-colon-cancer-cells-via-apoptosis-and-skp2-signaling-pathway
#11
Yin-Yin Lin, I-Yun Lee, Wen-Shih Huang, Yu-Shin Lin, Feng-Che Kuan, Li-Hsin Shu, Yu-Ching Cheng, Yao-Hsu Yang, Ching-Yuan Wu
ETHNOPHARMACOLOGICAL RELEVANCE: Danshen (Salvia miltiorrhiza Bunge) is widely used in traditional Chinese medicine. However, it's definite clinical effect and mechanism on colon carcinoma is unclear. AIM OF THE STUDY: To test the hypothesis that the protective effect of danshen on colon cancer and discover the bioactive compounds through in vitro study. MATERIALS AND METHODS: We conducted a nationwide cohort study by using population-based data from the Taiwan National Health Insurance Research Database (NHIRD)...
August 11, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28807337/evaluation-of-cd43-expression-in-non-hematopoietic-malignancies
#12
Bjorn H Batdorf, Steven H Kroft, Paul R Hosking, Alexandra M Harrington, Alexander C Mackinnon, Horatiu Olteanu
OBJECTIVES: CD43 is normally expressed only on the surface of leukocytes, and is considered a sensitive and specific marker for hematologic malignancies. As such, it may have diagnostic utility in confirming hematolymphoid lineage in cases that are negative for CD45. Aberrant CD43 expression has been described in non-hematopoietic tumors, although literature data on this topic is variable and sometimes contradictory. To clarify and expand on existing literature findings, we evaluated CD43 expression by immunohistochemistry (IHC) in a large cohort (307) of non-hematopoietic neoplasms, including poorly differentiated malignancies...
August 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28807224/mesua-ferrea-stem-bark-extract-induces-apoptosis-and-inhibits-metastasis-in-human-colorectal-carcinoma-hct-116-cells-through-modulation-of-multiple-cell-signalling-pathways
#13
Muhammad Asif, Armaghan Shafaei, Aman Shah Abdul Majid, Mohammed Oday Ezzat, Saad S Dahham, Mohamed B Khadeer Ahamed, Chern Ein Oon, Amin Malik Shah Abdul Majid
Considering the great potential of natural products as anticancer agents, the present study was designed to explore the molecular mechanisms responsible for anticancer activities of Mesua ferrea stem bark extract against human colorectal carcinoma. Based on MTT assay results, bioactive sub-fraction (SF-3) was selected for further studies using HCT 116 cells. Repeated column chromatography resulted in isolation of less active α-amyrin from SF-3, which was identified and characterized by GC-MS and HPLC methods...
July 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28805452/birt-hogg-dube-syndrome-with-a-novel-mutation-in-the-flcn-gene
#14
Gulsum Kayhan, Nilgun Yılmaz Demirci, Haluk Turktas, Mehmet Ali Ergun
BACKGROUND: Birt-Hogg-Dube syndrome (BHDS) is an autosomal dominant disease characterized by hair follicle hamartomas, kidney tumors, and spontaneous pneumothorax; its cause is a heterozygous mutation in the FLCN gene. Colorectal polyps and carcinoma have also been reported in BHDS. FLCN mutations can be detected in patients with isolated primary spontaneous pneumothorax (PSP), so PSP may present as part of BHDS. The aim of this report is to enhance awareness that patients presenting with spontaneous PSP should be evaluated for FLCN mutations...
August 14, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28803452/colonoscopic-surveillance-quality-guidelines-and-effectiveness
#15
REVIEW
Timothy J Chittleborough, Joseph C Kong, Glen R Guerra, Robert Ramsay, Alexander G Heriot
Colonoscopic surveillance in patients with a personal or family history of colorectal carcinoma or colonic polyps represents a significant workload for endoscopy services. Effective colonoscopic surveillance relies on quality endoscopic examination and appropriate surveillance interval. This review will discuss quality in colonoscopy and review guidelines for surveillance.
August 13, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28802998/on-the-sulfation-of-o-desmethyltramadol-by-human-cytosolic-sulfotransferases
#16
Mohammed I Rasool, Ahsan F Bairam, Katsuhisa Kurogi, Ming-Cheh Liu
BACKGROUND: Previous studies have demonstrated that sulfate conjugation is involved in the metabolism of the active metabolite of tramadol, O-desmethyltramadol (O-DMT). The current study aimed to systematically identify the human cytosolic sulfotransferases (SULTs) that are capable of mediating the sulfation of O-DMT. METHODS: The sulfation of O-DMT under metabolic conditions was demonstrated using HepG2 hepatoma cells and Caco-2 human colon carcinoma cells. O-DMT-sulfating activity of thirteen known human SULTs and four human organ specimens was examined using an established sulfotransferase assay...
February 16, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28797636/modulating-effect-of-inositol-hexaphosphate-on-arachidonic-acid-dependent-pathways-in-colon-cancer-cells
#17
Małgorzata Kapral, Joanna Wawszczyk, Stanisław Sośnicki, Katarzyna Jesse, Ludmiła Węglarz
Cyclooxygenase (COX) and lipoxygenase (LOX) are key enzymes of arachidonic acid metabolism. Their products, prostaglandins and leukotrienes, are involved in the pathogenesis of inflammatory bowel diseases and colorectal cancer. The aim of the study was to examine the influence of inositol hexaphosphate (IP6), a naturally occurring phytochemical, on the expression of genes encoding COX and LOX isoforms and synthesis of their products (PGE2 and LTB4) in colon cancer cell line Caco-2 stimulated with pro-inflammatory agents (IL-1β/TNFα)...
August 8, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/28796653/surgical-treatment-of-colon-cancer-of-the-splenic-flexure-a-systematic-review-and-meta-analysis
#18
Aleix Martínez-Pérez, Francesco Brunetti, Giulio C Vitali, Solafah Abdalla, Frédéric Ris, Nicola de'Angelis
This is a systematic review and meta-analysis on the surgical treatments of splenic flexure carcinomas (SFCs). Medline, EMBASE, and Scopus were searched from January 1990 to May 2016. Studies of at least 5 patients comparing extended right colectomy (ERC) versus left colectomy (LC) and/or laparoscopy versus open surgery for SFCs were retrieved and analyzed. Overall, 12 retrospective studies were selected, including 569 patients. ERC was performed in 23.2% of patients, whereas LC in 76.8%. Pooled data suggested that ERC and LC had similar oncologic quality of resection and postoperative outcomes...
August 7, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28796255/pdi-is-an-essential-redox-sensitive-activator-of-perk-during-the-unfolded-protein-response-upr
#19
Philip Kranz, Fabian Neumann, Alexandra Wolf, Fabian Classen, Mosche Pompsch, Tobias Ocklenburg, Jennifer Baumann, Kirsten Janke, Melanie Baumann, Kirsten Goepelt, Helena Riffkin, Eric Metzen, Ulf Brockmeier
Endoplasmic reticulum (ER) stress leads to activation of the unfolded protein response (UPR) that results in transient suppression of protein translation to allow recovery but leads to cell death when stress cannot be resolved. Central to initiation of the UPR is the activation of the ER transmembrane kinase protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK). Here we report that the thiol oxidoreductase ERp57 and protein disulfide isomerase-A1 (PDI), which belong to the same family of luminal ER oxidoreductases, have strikingly opposing roles in the regulation of PERK function...
August 10, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28791424/-to-stent-or-not-to-stent-immediate-emergency-surgery-with-laparoscopic-radical-colectomy-with-cme-and-primary-anastomosis-is-feasible-for-obstructing-left-colon-carcinoma
#20
Salomone Di Saverio, Arianna Birindelli, Edoardo Segalini, Matteo Novello, Anna Larocca, Francesco Ferrara, Gian Andrea Binda, Marco Bassi
Great debate exists in the initial acute management of large bowel obstruction from obstructing left colon carcinoma. While endoscopic stenting is well established as the first approach in the setting of palliative care of patients with advanced metastatic disease as well as a bridge to elective surgery in elderly patients who have an increased risk of postoperative mortality (age >70 years and/or ASA status ≥3), controversies exist regarding oncological safety and long-term outcomes of endoscopic colonic stenting in younger patients and ESGE Guidelines do not recommend SEMS placement in patients <70 and fit for curative surgery...
August 8, 2017: Surgical Endoscopy
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