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https://www.readbyqxmd.com/read/29236328/mirnalet-7a-mediates-prostate-cancer-pc-3-cell-invasion-migration-by-inducing-epithelial-mesenchymal-transition-through-ccr7-mapk-pathway
#1
Tang Guanlin, Du Ruoyang, Tang Zhaobing, Kuang Youlin
Prostate cancer is one of the most common malignancies in older men. Recent evidence has demonstrated microRNA (miRNA) Let-7a expression decreased in prostate cancer, while the expression of C-C chemokine receptor type 7 (CCR7) increased. In this study, we investigated whether CCR7 overexpression was associated with a decrease in the expression of miRNA let-7a in invasion and metastasis of prostate cancer cell. Methods Synthetic let-7a mimics and let-7a inhibitors were transfected into prostate cancer PC-3 cells repectively...
December 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29235877/cooperative-pd-cu-catalysis-multicomponent-synthesis-of-tetrasubstituted-imidazolones-from-methyl-%C3%AE-isocyanoacetates-primary-amines-and-aryl-vinyl-iodides
#2
Antonin Clemenceau, Qian Wang, Jieping Zhu
Three-component reaction of methyl α,α-disubstituted α-isocyanoacetates, primary amines, and aryl(vinyl) halides in the presence of Pd(OAc)2 (0.05 equiv) and Cu2O (1.0 equiv) provided 2,3,5,5-tetrasubstituted imidazolones via the formation of three chemical bonds. A copper-mediated migratory insertion of the isocyano group into the N-H bond of the amine followed by lactamization and Pd-catalyzed cross-coupling of the in situ generated amidinyl copper species with aryl(vinyl) halides accounted for the reaction outcome...
December 13, 2017: Organic Letters
https://www.readbyqxmd.com/read/29235674/loss-of-cyld-promotes-cell-invasion-via-alk5-stabilization-in-oral-squamous-cell-carcinoma
#3
Satoru Shinriki, Hirofumi Jono, Manabu Maeshiro, Takuya Nakamura, Jianying Guo, Jian-Dong Li, Mitsuharu Ueda, Ryoji Yoshida, Masanori Shinohara, Hideki Nakayama, Hirotaka Matsui, Yukio Ando
Oral squamous cell carcinoma (OSCC) has a very poor prognosis because of its highly invasive nature, and the 5-year survival rate has not changed appreciably for the past 30 years. Although cylindromatosis (CYLD), a deubiquitinating enzyme, is thought to be a potent tumour suppressor, its biological and clinical significance in OSCC is largely unknown. This study aimed to clarify the roles of CYLD in OSCC progression. Our immunohistochemical analyses revealed significantly reduced CYLD expression in invasive areas in OSCC tissues, whereas CYLD expression was conserved in normal epithelium and carcinoma in situ...
December 13, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29234489/molecular-insights-suppression-of-egfr-and-akt-activation-by-a-small-molecule-in-non-small-cell-lung-cancer
#4
Balaji Chandrasekaran, Ashish Tyagi, Arun K Sharma, Lu Cai, Murali Ankem, Chendil Damodaran
Epidermal growth factor receptor (EGFR) activation events and the mammalian target of rampamycin (mTOR) are considered important therapeutic targets in alleviating cancer conditions. The current treatment paradigm has shifted to personalized treatment strategies with tyrosine kinase inhibitors (TKIs) or anaplastic lymphoma kinase (ALK) inhibitors, due to low survival rates in non-small cell lung cancer (NSCLC) in terms of the prevailing platinum-based therapy. In the present study, we examined the anticancer potential of Verrucarin J (VJ), a small molecule, in NSCLC cell lines (H460 and A549)...
September 2017: Genes & Cancer
https://www.readbyqxmd.com/read/29234152/lncrna-spry4-it-was-concerned-with-the-poor-prognosis-and-contributed-to-the-progression-of-thyroid-cancer
#5
Haoyu Zhou, Zhihua Sun, Songwei Li, Xiaofeng Wang, Xuejun Zhou
Long non-coding RNAs (lncRNAs) have been demonstrated to be critical regulators in tumorigenesis. LncRNA SPRY4-IT1 has been identified as critical regulator for hepatocellular carcinoma and ovarian cancer. However, the potential role and clinical value of SPRY4-IT1 in human thyroid cancer (TC) still remain unclear and need to be uncovered. Our current study was aimed to ascertain the biological role of expression of SPRY4-IT1 in TC tissues and cells. Our findings revealed that the level of SPRY4-IT1 was significantly upregulated in TC tissues and cell lines, which was correlated with poor prognosis...
December 12, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/29232516/highly-enantioselective-synthesis-of-propargyl-amides-through-rh-catalyzed-asymmetric-hydroalkynylation-of-enamides-scope-mechanism-and-origin-of-selectivity
#6
Xiao-Yan Bai, Wen-Wen Zhang, Qian Li, Bi-Jie Li
Chiral propargyl amides are particularly useful structural units in organic synthesis. The enantioselective synthesis of propargyl amide is highly desirable. Conventional approach involves the use of stoichiometric amount of metal reagent or chiral auxiliary. In comparison, direct alkynylation with terminal alkyne is attractive because it avoids the use of stoichiometric organometallic reagent. The asymmetric coupling of aldehyde, amine and alkyne (A3-coupling) provide an efficient method for the synthesis of N-alkyl and N-aryl substituted propargyl amines, but this strategy is not amenable for the direct enantioselective synthesis of propargyl amide...
December 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29231998/phosphorylated-tyr142-%C3%AE-catenin-localizes-to-centrosomes-and-is-regulated-by-syk
#7
D Bhardwaj, M Náger, A Visa, M C Sallán, P J Coopman, C Cantí, J Herreros
β-catenin is a central component of adherent junctions and a key effector of canonical Wnt signalling, in which dephosphorylated Ser/Thr β-catenin regulates gene transcription. β-catenin phosphorylation at Tyr142 (PTyr142 β-catenin), which is induced by receptor and Src family Tyr kinases, represents a previously described β-catenin switch from adhesive to migratory roles. In addition to classical β-catenin roles, phosphorylated Ser/Thr β-catenin and total β-catenin were involved in centrosomal functions, including mitotic spindle formation and centrosome separation...
December 12, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29231726/activation-of-small-molecules-by-the-metal-amido-bond-of-rhodium-iii-and-iridium-iii-%C3%AE-5-c5me5-m-aminopyridinate-complexes
#8
Ana Zamorano, Nuria Rendón, Joaquín López-Serrano, Eleuterio Álvarez, Ernesto Carmona
We report the synthesis and structural characterization of five-coordinate complexes of rhodium and iridium of the type [(η5-C5Me5)M(N^N)]+ (3-M+), where N^N represents the aminopyridinate ligand derived from 2-NH(Ph)-6-(Xyl)C5H3N (Xyl = 2,6-Me2C6H3). The two complexes were isolated as salts of the BArF anion (BArF = B[3,5-(CF3)2C6H3]4). The M-Namido bond of complexes 3-M+ readily activated CO, C2H4, and H2. Thus, compounds 3-M+ reacted with CO under ambient conditions, but whereas for 3-Rh+, CO migratory insertion was fast, yielding a carbamoyl carbonyl species, 4-Rh+, the stronger Ir-Namido bond of complex 3-Ir+ caused the reaction to stop at the CO coordination stage...
December 12, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29230612/antibiotic-resistant-escherichia-coli-in-migratory-birds-inhabiting-remote-alaska
#9
Andrew M Ramey, Jorge Hernandez, Veronica Tyrlöv, Brian D Uher-Koch, Joel A Schmutz, Clara Atterby, Josef D Järhult, Jonas Bonnedahl
We explored the abundance of antibiotic-resistant Escherichia coli among migratory birds at remote sites in Alaska and used a comparative approach to speculate on plausible explanations for differences in detection among species. At a remote island site, we detected antibiotic-resistant E. coli phenotypes in samples collected from glaucous-winged gulls (Larus glaucescens), a species often associated with foraging at landfills, but not in samples collected from black-legged kittiwakes (Rissa tridactyla), a more pelagic gull that typically inhabits remote areas year-round...
December 11, 2017: EcoHealth
https://www.readbyqxmd.com/read/29230359/genetic-differentiation-and-phylogeography-of-mediterranean-north-eastern-atlantic-blue-shark-prionace-glauca-l-1758-using-mitochondrial-dna-panmixia-or-complex-stock-structure
#10
Agostino Leone, Ilenia Urso, Dimitrios Damalas, Jann Martinsohn, Antonella Zanzi, Stefano Mariani, Emilio Sperone, Primo Micarelli, Fulvio Garibaldi, Persefoni Megalofonou, Luca Bargelloni, Rafaella Franch, David Macias, Paulo Prodöhl, Séan Fitzpatrick, Marco Stagioni, Fausto Tinti, Alessia Cariani
Background: The blue shark (Prionace glauca, Linnaeus 1758) is one of the most abundant epipelagic shark inhabiting all the oceans except the poles, including the Mediterranean Sea, but its genetic structure has not been confirmed at basin and interoceanic distances. Past tagging programs in the Atlantic Ocean failed to find evidence of migration of blue sharks between the Mediterranean and the adjacent Atlantic, despite the extreme vagility of the species. Although the high rate of by-catch in the Mediterranean basin, to date no genetic study on Mediterranean blue shark was carried out, which constitutes a significant knowledge gap, considering that this population is classified as "Critically Endangered", unlike its open-ocean counterpart...
2017: PeerJ
https://www.readbyqxmd.com/read/29230281/colon-adenocarcinoma-after-jejunoileal-bypass-for-morbid-obesity
#11
Lee Morris, Ilimbek Beketaev, Roberto Barrios, Patrick Reardon
Jejunoileal bypass (JIB) was developed as a surgical treatment for morbid obesity in the early 1950s. However, this procedure is now known to be associated with multiple metabolic complications and has subsequently been abandoned as a viable bariatric procedure. Some of these known complications include renal stone formation, liver failure, migratory arthritis, fat-soluble deficiencies, blind-loop syndrome and severe diarrhea. Additionally, there have been animal models suggesting colon dysplasia after JIB...
November 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29229919/migratory-dendritic-cells-acquire-and-present-lymphatic-endothelial-cell-archived-antigens-during-lymph-node-contraction
#12
Ross M Kedl, Robin S Lindsay, Jeffrey M Finlon, Erin D Lucas, Rachel S Friedman, Beth A Jirón Tamburini
Antigens derived from viral infection or vaccination can persist within a host for many weeks after resolution of the infection or vaccine responses. We previously identified lymphatic endothelial cells (LEC) as the repository for this antigen archival, yet LECs are unable to present their archived antigens to CD8+ T cells, and instead transfer their antigens to CD11c+ antigen-presenting cells (APC). Here we show that the exchange of archived antigens between LECs and APCs is mediated by migratory dendritic cells (DC)...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229751/suv420h2-is-an-epigenetic-regulator-of-epithelial-mesenchymal-states-in-pancreatic-cancer
#13
Manuel Viotti, Catherine Wilson, Mark McCleland, Hartmut Koeppen, Benjamin Haley, Suchit Jhunjhunwala, Christiaan Klijn, Zora Modrusan, David Arnott, Marie Classon, Jean-Philippe Stephan, Ira Mellman
Epithelial-to-mesenchymal transition is implicated in metastasis, where carcinoma cells lose sessile epithelial traits and acquire mesenchymal migratory potential. The mesenchymal state is also associated with cancer stem cells and resistance to chemotherapy. It might therefore be therapeutically beneficial to promote epithelial identity in cancer. Because large-scale cell identity shifts are often orchestrated on an epigenetic level, we screened for candidate epigenetic factors and identified the histone methyltransferase SUV420H2 (KMT5C) as favoring the mesenchymal identity in pancreatic cancer cell lines...
December 11, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29228664/chromatin-remodeling-protein-morc2-promotes-breast-cancer-invasion-and-metastasis-through-a-prd-domain-mediated-interaction-with-ctnnd1
#14
Xiao-Hong Liao, Ye Zhang, Wen-Jie Dong, Zhi-Min Shao, Da-Qiang Li
MORC family CW-type zinc finger 2 (MORC2) is a newly identified chromatin remodeling protein with emerging roles in the regulation of DNA damage response and gene transcription, but its mechanistic role in breast cancer development and progression remains unexplored. Here, we show that MORC2 promoted breast cancer invasion and metastasis and these effects depended on a proline-rich domain (PRD) within its carboxy-terminal region spanning residues 601-734. Induced expression of wild-type MORC2 did not significantly affect cell proliferation and cell-cycle progression, but promoted breast cancer cell migration and invasion in vitro and metastatic lung colonization in vivo...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228645/pro-invasive-properties-of-snail1-are-regulated-by-sumoylation-in-response-to-tgf%C3%AE-stimulation-in-cancer
#15
Shyam Kumar Gudey, Reshma Sundar, Carl-Henrik Heldin, Anders Bergh, Marene Landström
Transforming growth factor β (TGFβ) is a key regulator of epithelial-to-mesenchymal transition (EMT) during embryogenesis and in tumors. The effect of TGFβ, on ΕΜΤ, is conveyed by induction of the pro-invasive transcription factor Snail1. In this study, we report that TGFβ stimulates Snail1 sumoylation in aggressive prostate, breast and lung cancer cells. Sumoylation of Snail1 lysine residue 234 confers its transcriptional activity, inducing the expression of classical EMT genes, as well as TGFβ receptor I (TβRI) and the transcriptional repressor Hes1...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228585/role-of-the-jak2-stat3-signaling-pathway-in-the-pathogenesis-of-type-2-diabetes-mellitus-with-macrovascular-complications
#16
Mengxue Yang, Mei Tian, Xuan Zhang, Jie Xu, Bo Yang, Jie Yu, Fengping Li, Ya Li, Sicheng Li, Xianwen Li
This study investigated the role of the JAK2/STAT3/SOCS pathway in type 2 diabetes mellitus (T2DM) and macrovascular complications (DV) (T2DM+DV) conditions. Human umbilical vein endothelial cells (HUVECs) were co-cultured with human monocytes (THP-1) and exposed to peripheral blood sera from 30 T2DM patients, 30 patients with T2DM+DV and 30 healthy controls; the groups were divided into the control, T2DM, DV, T2DM+AG490 and DV+AG490 groups. Chemotaxis of treated HUVECs toward THP-1 cells was assessed using Transwell migration...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228349/genome-wide-snps-identify-limits-to-connectivity-in-the-extreme-freshwater-disperser-spangled-perch-leiopotherapon-unicolor-terapontidae
#17
Daniel J Schmidt, Joel A Huey, Jane M Hughes
The utility of restriction-site associated DNA sequencing (RADseq) to resolve fine-scale population structure was tested on an abundant and vagile fish species in a tropical river. Australia's most widespread freshwater fish, the "extreme disperser" Leiopotherapon unicolor was sampled from six locations in an unregulated system, the Daly River in Australia's Northern Territory. Despite an expectation of high connectivity based on life history knowledge of this species derived from arid zone habitats, L. unicolor was not a panmictic population in the tropical lower Daly...
November 11, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/29225603/regulatory-t-cells-suppress-inflammation-and-blistering-in-pemphigoid-diseases
#18
Katja Bieber, Shijie Sun, Mareike Witte, Anika Kasprick, Foteini Beltsiou, Martina Behnen, Tamás Laskay, Franziska S Schulze, Elena Pipi, Niklas Reichhelm, René Pagel, Detlef Zillikens, Enno Schmidt, Tim Sparwasser, Kathrin Kalies, Ralf J Ludwig
Regulatory T cells (Tregs) are well known for their modulatory functions in adaptive immunity. Through regulation of T cell functions, Tregs have also been demonstrated to indirectly curb myeloid cell-driven inflammation. However, direct effects of Tregs on myeloid cell functions are insufficiently characterized, especially in the context of myeloid cell-mediated diseases, such as pemphigoid diseases (PDs). PDs are caused by autoantibodies targeting structural proteins of the skin. Autoantibody binding triggers myeloid cell activation through specific activation of Fc gamma receptors, leading to skin inflammation and subepidermal blistering...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29224790/increased-expression-of-semaphorin-3a-in-the-endothelin-receptor-b-null-mouse-model-of-hirschsprung-disease
#19
Naho Fujiwara, Katsumi Miyahara, Nana Nakazawa-Tanaka, Chihiro Akazawa, Atsuyuki Yamataka
PURPOSE: Semaphorins are guidance cues for developing neurons, implicated in the determination of the migratory pathway of neural crest-derived neural precursors during enteric nervous system development. Recently, it has been reported that Semaphorin 3A (SEMA3A) expression is up-regulated in the aganglionic colon in Hirschsprung disease (HD) patients, suggesting that increased SEMA3A expression may be a risk factor for HD. Thus, the aim of our study was to determine the expression of SEMA3A using Sox10-Venus mice gut...
November 14, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29224710/spm-1-producing-pseudomonas-aeruginosa-st277-clone-recovered-from-microbiota-of-migratory-birds
#20
Willames M B S Martins, Ana Clara Narciso, Rodrigo Cayô, Stéfanie Vanessa Santos, Lorena C C Fehlberg, Patrícia Locosque Ramos, João Batista da Cruz, Ana Cristina Gales
The production of São Paulo metallo-β-lactamase (SPM-1) is the most common carbapenem resistance mechanism detected among multidrug-resistant Pseudomonas aeruginosa clinical isolates in Brazil. Dissemination of SPM-1-producing P. aeruginosa has been restricted to the nosocomial settings, with sporadic reports of environmental isolates due to contamination by hospital sewage. Herein, we described the detection and molecular characterization of SPM-1-producing P. aeruginosa recovered from the microbiota of migratory birds in Brazil...
November 10, 2017: Diagnostic Microbiology and Infectious Disease
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