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https://www.readbyqxmd.com/read/29161777/structure-based-design-and-evaluation-of-synthetic-porphyrin-derivatives-as-g-quadruplex-stabilizing-anticancer-agents
#1
R N Bhadane, D B Meshram, R M Gilhotra
G-quadruplex structures formed in telomeres and proto-oncogene represent a potentially useful target for anticancer drugs. Stabilization of this arrangement may inhibit the further action of different enzymes involved in cancer cell immortalization. In present work structure based drug design and synthesis was carried out on series of meso-substituted porphyrin analogues. The interaction of porphyrin derivatives with G-quadruplex DNA has been explored by virtual screening procedure. Some of the potential binding agents were then synthesized and evaluated in-vitro by MTT and PCR stop assay...
November 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/29161327/thallium-stimulates-ethanol-production-in-immortalized-hippocampal-neurons
#2
Laura Colombaioni, Massimo Onor, Edoardo Benedetti, Emilia Bramanti
Lactate and ethanol (EtOH) were determined in cell culture medium (CCM) of immortalized hippocampal neurons (HN9.10e cell line) before and after incubation with Thallium (Tl). This cell line is a reliable, in vitro model of one of the most vulnerable regions of central nervous system. Cells were incubated for 48 h with three different single Tl doses: 1, 10, 100 μg/L (corresponding to 4.9, 49 and 490 nM, respectively). After 48 h, neurons were "reperfused" with fresh CCM every 24/48 h until 7 days after the treatment and the removed CCM was collected and analysed...
2017: PloS One
https://www.readbyqxmd.com/read/29159877/crystalline-structure-of-pulverized-dental-calculus-induces-cell-death-in-oral-epithelial-cells
#3
S M Ziauddin, A Yoshimura, J L Montenegro Raudales, Y Ozaki, K Higuchi, T Ukai, T Kaneko, T Miyazaki, E Latz, Y Hara
BACKGROUND AND OBJECTIVE: Dental calculus is a mineralized deposit attached to the tooth surface. We have shown that cellular uptake of dental calculus triggers nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome activation, leading to the processing of the interleukin-1β precursor into its mature form in mouse and human phagocytes. The activation of the NLRP3 inflammasome also induced a lytic form of programmed cell death, pyroptosis, in these cells...
November 20, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29158522/mir-17-5p-and-mir-20a-promote-chicken-cell-proliferation-at-least-in-part-by-upregulation-of-c-myc-via-map3k2-targeting
#4
Xiaofei Zhang, He Song, Shupei Qiao, Jing Liu, Tianyu Xing, Xiaohong Yan, Hui Li, Ning Wang
The miR-17-92 cluster has been well studied in mammals but less extensively studied in birds. Here, we demonstrated that miR-17-92 cluster overexpression promoted the proliferation of DF1 cells and immortalized chicken preadipocytes (ICPA-1), and miR-17-5p and miR-20a, members of the miR-17-92 cluster, targeted MAP3K2. Further analysis showed that MAP3K2 overexpression reduced the proliferation of DF1 and ICPA-1 cells and attenuated the promotive effect of the miR-17-92 cluster on cell proliferation. Downstream gene expression analysis of the MAPK signalling pathway showed that MAP3K2 overexpression decreased c-Myc expression; in contrast, MAP3K2 knockdown using RNA interference and miR-17-92 cluster overexpression increased c-Myc expression...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29156764/the-neil1-g83d-germline-dna-glycosylase-variant-induces-genomic-instability-and-cellular-transformation
#5
Heather A Galick, Carolyn G Marsden, Scott Kathe, Julie A Dragon, Lindsay Volk, Antonia A Nemec, Susan S Wallace, Aishwarya Prakash, Sylvie Doublié, Joann B Sweasy
Base excision repair (BER) is a key genome maintenance pathway. The NEIL1 DNA glycosylase recognizes oxidized bases, and likely removes damage in advance of the replication fork. The rs5745906 SNP of the NEIL1 gene is a rare human germline variant that encodes the NEIL1 G83D protein, which is devoid of DNA glycosylase activity. Here we show that expression of G83D NEIL1 in MCF10A immortalized but non-transformed mammary epithelial cells leads to replication fork stress. Upon treatment with hydrogen peroxide, we observe increased levels of stalled replication forks in cells expressing G83D NEIL1 versus cells expressing the wild-type (WT) protein...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156753/candidate-tumor-suppressor-znf154-suppresses-invasion-and-metastasis-in-npc-by-inhibiting-the-emt-via-wnt-%C3%AE-catenin-signalling
#6
Ying Hu, Min-Fang Qi, Qian-Lan Xu, Xiang-Yun Kong, Rui Cai, Qiu-Qiu Chen, Hua-Ying Tang, Wei Jiang
Background: Nasopharyngeal carcinoma (NPC) is especially prevalent in southeast Asia and southern China, but its molecular mechanisms remain poorly characterized. DNA methylation is associated with initiation and progression of tumors, including NPC. Through a genome-wide DNA methylation screening approach, we discovered ZNF154, but its methylation status and roles in NPC have not been investigated. Methods: The methylation status of ZNF154 in NPC was detected with Methylation specific-PCR (MSP) and Quantitative Sequenom MassARRAY...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156522/the-prevention-of-tnf-%C3%AE-ifn-%C3%AE-mixture-induced-inflammation-in-human-keratinocyte-and-atopic-dermatitis-like-skin-lesions-in-nc-nga-mice-by-mineral-balanced-deep-sea-water
#7
Kyu-Shik Lee, So-Young Chun, Min-Gu Lee, Soyoung Kim, Tae-Jung Jang, Kyung-Soo Nam
Atopic dermatitis (AD) is a chronic inflammatory skin disease caused by environmental and chemical allergens. Despite the complexity of its pathogenesis, many investigations have shown that substances having anti-inflammatory activities alleviated the pathology of AD. Here, we evaluated the effects of mineral-balanced deep sea water (DSW) on AD-like skin damage in both in vitro and in vivo. The results showed that mineral-balanced DSW regressed inflammatory chemokines, such as macrophage-derived chemokine (MDC), thymus- and activation-regulated chemokine (TARC) and regulated on activation, normal T-cell expressed and secreted (RANTES), and cytokines, interleukin (IL)-6 and granulocyte-macrophage colony-stimulating factor (GM-CSF) mRNA expression in HaCaT immortal human keratinocyte treated with tumor necrosis factor (TNF)-α/ interferon (IFN)-γ mixture...
November 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29156121/the-toxmatrix-chemo-genomic-profiling-identifies-interactions-that-reveal-mechanisms-of-toxicity
#8
Zhi-Bin Tong, Ruili Huang, Yuhong Wang, Carleen Klumpp-Thomas, John Braisted, Zina Itkin, Paul Shinn, Menghang Xia, Anton Simeonov, David Gerhold
A chemical genomics 'Toxmatrix' method was developed to elucidate mechanisms of cytotoxicity using neuronal models. Quantitative high-throughput screening (qHTS) was applied to systematically screen each toxicant against a panel of 70 modulators, drugs or chemicals that act on a known target, to identify interactions that either protect or sensitize cells to each toxicant. Thirty-two toxicants were tested at 10 concentrations for cytotoxicity to SH-SY5Y human neuroblastoma cells, with results fitted to the Hill equation to determine an IC50 for each toxicant...
November 20, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29154474/intracrine-prostaglandin-e2-pro-tumoral-actions-in-prostate-epithelial-cells-originate-from-non-canonical-pathways
#9
Antonio Madrigal-Martínez, Ana B Fernández-Martínez, Francisco J Lucio Cazaña
Prostaglandin E2 (PGE2 ) increases cell proliferation and stimulates migratory and angiogenic abilities in prostate cancer cells. However, the effects of PGE2 on non-transformed prostate epithelial cells are unknown, despite the fact that PGE2 overproduction has been found in benign hyperplastic prostates. In the present work we studied the effects of PGE2 in immortalized, non-malignant prostate epithelial RWPE-1 cells and found that PGE2 increased cell proliferation, cell migration, and production of vascular endothelial growth factor-A, and activated in vitro angiogenesis...
November 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29152579/streptococcus-pneumoniae-tigr4-phase-locked-opacity-variants-differ-in-virulence-phenotypes
#10
Melissa B Oliver, Ankita Basu Roy, Ranjit Kumar, Elliot J Lefkowitz, W Edward Swords
Streptococcus pneumoniae (pneumococcus) is a leading human pathogen that can cause serious localized and invasive diseases. Pneumococci can undergo a spontaneous and reversible phase variation that is reflected in colony opacity and which allows the population to adapt to different host environments. Generally, transparent variants are adapted for nasopharyngeal colonization, whereas opaque variants are associated with invasive disease. In recent work, colony phase variation was shown to occur by means of recombination events to generate multiple alleles of the hsdS targeting domain of a DNA methylase complex, which mediates epigenetic changes in gene expression...
November 2017: MSphere
https://www.readbyqxmd.com/read/29151088/cotard-syndrome
#11
Sebastian Dieguez
Cotard's syndrome is often described as the delusional belief that one is dead or non-existent. However, Jules Cotard's initial description (1880) of the "delusion of negations" was much richer and also involved delusions and claims of immortality and enormity, feelings of damnation, and illusions of bodily dissolution and transformation. Alternatively conceived as an extreme case of depression, hypochondria, or psychosis, the condition is considered rare and remains poorly understood. Cotard himself provided a taxonomy and several explanations for the condition, focusing on its distinction from classical persecutory delusions and suggesting that it could be a kind of reversed grandiosity...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29150594/mating-design-and-genetic-structure-of-a-multi-parent-advanced-generation-inter-cross-magic-population-of-sorghum-sorghum-bicolor-l-moench
#12
Patrick O Ongom, Gebisa Ejeta
MAGIC populations are powerful next generation mapping resources. We describe here the mating design and structure of the first MAGIC population in sorghum and test its utility for mapping. The population was developed by intercrossing 19 diverse founder lines, through a series of paired crosses with a genetic male sterile source, followed by 10 generations of random mating. At the final stage of random mating, one thousand random fertile plants in the population were identified and subjected to six generations of selfing to produce 1000 immortal MAGIC inbred lines...
November 17, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29150164/testosterone-replacement-therapy-and-the-risk-of-stroke-in-men-a-systematic-review
#13
REVIEW
Simone Y Loo, Bing Yu Chen, Oriana Hoi Yun Yu, Laurent Azoulay, Christel Renoux
In recent years, questions have been raised regarding the cardiovascular safety of testosterone replacement therapy (TRT). The objective of this study was to systematically review the available evidence on TRT safety in men, specifically with respect to the risk of stroke. We identified publications from MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials up to May 2017. Articles eligible for review included observational studies evaluating TRT and the risk of stroke among men aged 18 or older...
December 2017: Maturitas
https://www.readbyqxmd.com/read/29149179/postmenopausal-hormone-therapy-and-risk-of-stroke-a-pooled-analysis-of-data-from-population-based-cohort-studies
#14
Germán D Carrasquilla, Paolo Frumento, Anita Berglund, Christer Borgfeldt, Matteo Bottai, Chiara Chiavenna, Mats Eliasson, Gunnar Engström, Göran Hallmans, Jan-Håkan Jansson, Patrik K Magnusson, Peter M Nilsson, Nancy L Pedersen, Alicja Wolk, Karin Leander
BACKGROUND: Recent research indicates a favourable influence of postmenopausal hormone therapy (HT) if initiated early, but not late, on subclinical atherosclerosis. However, the clinical relevance of timing of HT initiation for hard end points such as stroke remains to be determined. Further, no previous research has considered the timing of initiation of HT in relation to haemorrhagic stroke risk. The importance of the route of administration, type, active ingredient, and duration of HT for stroke risk is also unclear...
November 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29142129/entry-of-human-coronavirus-nl63-to-the-cell
#15
Aleksandra Milewska, Paulina Nowak, Katarzyna Owczarek, Artur Szczepanski, Miroslaw Zarebski, Agnieszka Hoang-Bujnowicz, Krzysztof Berniak, Jacek Wojarski, Slawomir Zeglen, Zbigniew Baster, Zenon Rajfur, Krzysztof Pyrc
First steps of human coronavirus NL63 (HCoV-NL63) infection were previously described. The virus binds to target cells by heparan sulfate proteoglycans, and interacts with the ACE2 protein. Subsequent events, including virus internalization and trafficking, remain to be elucidated. In this study, we mapped the process of HCoV-NL63 entry into LLC-Mk2 cell line and ex vivo 3D tracheobronchial tissue.Using a variety of techniques we have shown that HCoV-NL63 virions require endocytosis for successful entry to the LLC-MK2 cells, and interaction between the virus and the ACE2 molecule triggers recruitment of clathrin...
November 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29137300/patz1-knockdown-enhances-malignant-phenotype-in-thyroid-epithelial-follicular-cells-and-thyroid-cancer-cells
#16
Asumi Iesato, Teruo Nakamura, Hiroto Izumi, Takeshi Uehara, Ken-Ichi Ito
This study was designed to examine the involvement of PATZ1 in carcinogenesis and dedifferentiation of thyroid cancer. Immunohistochemistry on clinical specimens indicated nuclear PATZ1 expression in all normal thyroid glands and adenomatous goiter, while nuclear PATZ1 expression decreased along with the dedifferentiation of thyroid cancer. Knockdown of nuclear PATZ1 by siRNA in an immortalized normal follicular epithelial cell line (Nthy-ori 3-1) altered cellular morphology and significantly increased cell proliferation, migration, and invasion...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137231/an-oral-keratinocyte-life-cycle-model-identifies-novel-host-genome-regulation-by-human-papillomavirus-16-relevant-to-hpv-positive-head-and-neck-cancer
#17
Michael R Evans, Claire D James, Oonagh Loughran, Tara J Nulton, Xu Wang, Molly L Bristol, Brad Windle, Iain M Morgan
Many aspects of the HPV life cycle have been characterized in cervical cell lines (W12, CIN612) and in HPV immortalized primary foreskin keratinocytes. There is now an epidemic of HPV positive oropharyngeal cancers (HPV16 is responsible for 80-90% of these); therefore increased understanding of the HPV16 life cycle in oral keratinocytes is a priority. To date there have been limited reports characterizing the HPV16 life cycle in oral keratinocytes. Using TERT immortalized "normal" oral keratinocytes (NOKs) we generated clonal cell lines maintaining the HPV16 genome as an episome, NOKs+HPV16...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133122/involvement-of-cannabinoid-receptor-type-2-in-light-induced-degeneration-of-cells-from-mouse-retinal-cell-line-in-vitro-and-mouse-photoreceptors-in-vivo
#18
Tomoyo Imamura, Kazuhiro Tsuruma, Yuki Inoue, Tomohiro Otsuka, Yuta Ohno, Shiho Ogami, Shinsaku Yamane, Masamitsu Shimazawa, Hideaki Hara
Earlier studies showed that the expressions of the agonists of the cannabinoid receptors are reduced in the vitreous humor of patients with age-related macular degeneration (AMD), and the cannabinoid type 2 receptor is present in the retinas of rats and monkeys. The purpose of this study was to determine whether the cannabinoid type 2 receptor is involved in the light-induced death of cultured 661W cells, an immortalized murine retinal cell line, and in the light-induced retinal degeneration in mice. Time-dependent changes in the expression and location of retinal cannabinoid type 2 receptor were determined by Western blot and immunostaining...
November 10, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29132924/impact-of-capsaicin-an-active-component-of-chili-pepper-on-pathogenic-chlamydial-growth-chlamydia-trachomatis-and-chlamydia-pneumoniae-in-immortal-human-epithelial-hela-cells
#19
Kazuya Yamakawa, Junji Matsuo, Torahiko Okubo, Shinji Nakamura, Hiroyuki Yamaguchi
Chlamydia trachomatis is the leading cause of sexually transmitted infections worldwide. Capsaicin, a component of chili pepper, which can stimulate actin remodeling via capsaicin receptor TRPV1 (transient receptor potential vanilloid 1) and anti-inflammatory effects via PPARγ (peroxisome proliferator-activated receptor-γ) and LXRα (liver X receptor α), is a potential candidate to control chlamydial growth in host cells. We examined whether capsaicin could inhibit C. trachomatis growth in immortal human epithelial HeLa cells...
November 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29132324/caismov24-a-new-human-low-grade-serous-ovarian-carcinoma-cell-line
#20
Rodrigo Fernandes da Silva, Daniela Maira Cardozo, Gisele Olinto Libanio Rodrigues, Caroline Natânia de Souza-Araújo, Natacha Azussa Migita, Liliana Aparecida Lucci de Angelo Andrade, Sophie Derchain, José Andrés Yunes, Fernando Guimarães
BACKGROUND: The spontaneous immortalization of primary malignant cells is frequently assigned to their genetic instability during in vitro culturing. In this study, the new epithelial ovarian cancer cell line CAISMOV24 was described and compared with its original low-grade serous ovarian carcinoma. METHODS: The in vitro culture was established with cells isolated from ascites of a 60-year-old female patient with recurrent ovarian cancer. The CAISMOV24 line was assessed for cell growth, production of soluble biomarkers, expression of surface molecules and screened for typical mutations found in serous ovarian carcinoma...
November 13, 2017: BMC Cancer
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