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Andrée F Maheux, Adnane Sellam, Yves Piché, Maurice Boissinot, René Pelletier, Dominique K Boudreau, François J Picard, Hélène Trépanier, Marie-Josée Boily, Marc Ouellette, Paul H Roy, Michel G Bergeron
Successful treatment of a Candida infection relies on 1) an accurate identification of the pathogenic fungus and 2) on its susceptibility to antifungal drugs. In the present study we investigated the level of correlation between phylogenetical evolution and susceptibility of pathogenic Candida spp. to antifungal drugs. For this, we compared a phylogenetic tree, assembled with the concatenated sequences (2475-bp) of the ATP2, TEF1, and TUF1 genes from 20 representative Candida species, with published minimal inhibitory concentrations (MIC) of the four principal antifungal drug classes commonly used in the treatment of candidiasis: polyenes, triazoles, nucleoside analogues, and echinocandins...
October 3, 2016: Journal of Microbiological Methods
Huan Peng, Kristin Rübsam, Felix Jakob, Ulrich Schwaneberg, Andrij Pich
This paper reports a facile approach for encapsulation of enzymes in nanogels. Our approach is based on the use of reactive copolymers able to get conjugated with enzyme and build 3D colloidal networks or biohybrid nanogels. In a systematic study we address the question: how the chemical structure of nanogel network influences the biocatalytic activity of entrapped enzyme? The developed method allows precise control of the enzyme activity and improvement of enzyme resistance against harsh store conditions, chaotropic agents and organic solvents...
September 19, 2016: Biomacromolecules
Andreas Frick, Fredrik Åhs, Lieuwe Appel, My Jonasson, Kurt Wahlstedt, Massimo Bani, Emilio Merlo Pich, Paolo Bettica, Bengt Långström, Mark Lubberink, Mats Fredrikson, Tomas Furmark
Social anxiety disorder (SAD) is associated with increased fear-related neural activity in the amygdala and we recently found enhanced serotonin synthesis rate in the same region. Anxiolytic agents like selective serotonin re-uptake inhibitors (SSRIs) and neurokinin-1 receptor (NK1R) antagonists reduce amygdala activity and may attenuate serotonin formation according to animal studies. Here, we examined the effects of SSRI pharmacotherapy, NK1R antagonism, and placebo on serotonin synthesis rate in relation to neural activity, measured as regional cerebral blood flow (rCBF), and symptom improvement in SAD...
September 15, 2016: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Huan Peng, Kristin Rübsam, Felix Jakob, Patrizia Pazdzior, Ulrich Schwaneberg, Andrij Pich
Novel redox-responsive polymeric nanogels that allow highly efficient enzyme encapsulation and reversible modulation of enzyme activity are developed. The nanogel synthesis and encapsulation of enzyme are performed simultaneously via in situ crosslinking of pyridyldisulfide-functionalized water-soluble reactive copolymers, which are synthesized via reversible addition-fragmentation chain transfer copolymerization. Obtained nanogels with loaded cellulase demonstrate very good colloidal stability in aqueous solutions...
September 15, 2016: Macromolecular Rapid Communications
Guillaume Sarrabayrouse, Christine Pich, Iotefa Teiti, Anne Françoise Tilkin-Mariame
Melanoma is a highly lethal cutaneous tumor, killing affected patients through development of multiple poorly immunogenic metastases. Suboptimal activation of immune system by melanoma cells is often due to molecular modifications occurring during tumor progression that prevent efficient recognition of melanoma cells by immune effectors. Statins are HMG-CoA reductase inhibitors, which block the mevalonate synthesis pathway, used by millions of people as hypocholesterolemic agents in cardiovascular and cerebrovascular diseases...
September 12, 2016: International Journal of Cancer. Journal International du Cancer
Denis Lane, Isabelle Matte, Claude Laplante, Perrine Garde-Granger, Alex Carignan, Paul Bessette, Claudine Rancourt, Alain Piché
BACKGROUND: Ovarian cancer (OC) ascites consist in a proinflammatory tumor environment that is characterized by the presence of various cytokines, chemokines and growth factors. The presence of these inflammatory-related factors in ascites is associated with a more aggressive tumor phenotype. CCL18 is a member of CCL chemokines and its expression has been associated with poor prognosis in some cancers. However, its role in OC progression has not been established. Therefore, the aim of the current study was to elucidate the role of ascites CCL18 in OC progression...
2016: Molecular Cancer
Isabelle Matte, Clara Major Legault, Perrine Garde-Granger, Claude Laplante, Paul Bessette, Claudine Rancourt, Alain Piché
Epithelial ovarian cancer (EOC) dissemination is primarily mediated by the shedding of tumor cells from the primary site into ascites where they form multicellular spheroids that rapidly lead to peritoneal carcinomatosis. While the clinical importance and fundamental role of multicellular spheroids in EOC is increasingly appreciated, the mechanisms that regulate their formation and dictate their cellular composition remain poorly characterized. To investigate these important questions, we characterized spheroids isolated from ascites of women with EOC...
September 9, 2016: Clinical & Experimental Metastasis
Christian F Nielsen, Ian D Hickson
PICH is an SNF2-family DNA translocase that appears to play a role specifically in mitosis. Characterization of PICH in human cells led to the initial discovery of "ultra-fine DNA bridges" (UFBs) that connect the 2 segregating DNA masses in the anaphase of mitosis. These bridge structures, which arise from specific regions of the genome, are a normal feature of anaphase but had escaped detection previously because they do not stain with commonly used DNA dyes. Nevertheless, UFBs are important for genome maintenance because defects in UFB resolution can lead to cytokinesis failure...
October 17, 2016: Cell Cycle
Salma Taktek, Marc St-Arnaud, Yves Piché, J André Fortin, Hani Antoun
Biofilm formation on abiotic and biotic surfaces was studied with two hyphobacteria, strongly attached to the surface of the arbuscular mycorrhizal fungus (AMF) Rhizoglomus irregulare (Ri) DAOM 197198 and two mycorrhizobacteria, loosely attached to the roots of different mycorrhizal plants. When the sparingly soluble igneous phosphate rock (PR) from Quebec, or when the chemical hydroxyapatite were used as sole phosphorus (P) source, hyphobacteria Rhizobium miluonense Rm3 and Burkholderia anthina Ba8 produced significantly more biofilms than mycorrhizobacteria Rahnella sp...
August 19, 2016: Mycorrhiza
Monirath Hav, Sokha Eav, Nicole Heang, Pintuna Pich, Davy Lim, Vitou Leang, Aun Korn, Sanine Lay, Michel Pluot, Leangsim Kruy
Prevalence of Abnormal Cervical Cytology in HIVNegative Women Participating in a Cervical Cancer Screening Program in Calmette Hospital, Cambodia.
2016: Asian Pacific Journal of Cancer Prevention: APJCP
Ganesha P Pitchai, Ian D Hickson, Werner Streicher, Guillermo Montoya, Pablo Mesa
Chromosome integrity depends on DNA structure-specific processing complexes that resolve DNA entanglement between sister chromatids. If left unresolved, these entanglements can generate either chromatin bridging or ultrafine DNA bridging in the anaphase of mitosis. These bridge structures are defined by the presence of the PICH protein, which interacts with the BEND3 protein in mitosis. To obtain structural insights into PICH-BEND3 complex formation at the atomic level, their respective NTPR and BD1 domains were cloned, overexpressed and crystallized using 1...
August 2016: Acta Crystallographica. Section F, Structural Biology Communications
Christine C Lee, Michael J Matunis
No abstract text is available yet for this article.
October 2016: Cell Cycle
S Sacco, R Ornello, D Degan, C Tiseo, F Pistoia, A Carolei
BACKGROUND AND PURPOSE: The incidence and case-fatality rate (CFR) of primary intracerebral hemorrhage (PICH) over two decades were assessed in a prospective population-based study. METHODS: Cases of incident first-ever PICH were recorded over a 2-year period (2011-2012) from multiple sources in the district of L'Aquila, central Italy. Included patients were followed up to 1 year after the event to ascertain CFRs. Current data were compared with those previously collected from 1994 through 1998...
November 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
D G Howe, Y M Bradford, A Eagle, D Fashena, K Frazer, P Kalita, P Mani, R Martin, S T Moxon, H Paddock, C Pich, S Ramachandran, L Ruzicka, K Schaper, X Shao, A Singer, S Toro, C Van Slyke, M Westerfield
The Zebrafish Model Organism Database (ZFIN; serves as the central repository for genetic and genomic data produced using zebrafish (Danio rerio). Data in ZFIN are either manually curated from peer-reviewed publications or submitted directly to ZFIN from various data repositories. Data types currently supported include mutants, transgenic lines, DNA constructs, gene expression, phenotypes, antibodies, morpholinos, TALENs, CRISPRs, disease models, movies, and images. The rapidly changing methods of genomic science have increased the production of data that cannot readily be represented in standard journal publications...
2016: Methods in Cell Biology
Steven Arnocky, Tina Piché, Graham Albert, Danielle Ouellette, Pat Barclay
In order for non-kin altruism to evolve, altruists must receive fitness benefits for their actions that outweigh the costs. Several researchers have suggested that altruism is a costly signal of desirable qualities, such that it could have evolved by sexual selection. In two studies, we show that altruism is broadly linked with mating success. In Study 1, participants who scored higher on a self-report altruism measure reported they were more desirable to the opposite sex, as well as reported having more sex partners, more casual sex partners, and having sex more often within relationships...
July 18, 2016: British Journal of Psychology
Jonas Krueger, Sarah Pohl, Matthias Preusse, Adrian Kordes, Nils Rugen, Monika Schniederjans, Andreas Pich, Susanne Häussler
Transcriptional regulation has a central role in cellular adaptation processes and is well investigated. In contrast, the importance of the post-transcriptional regulation on these processes is less well defined. The technological advancements have been critical to precisely quantify protein and mRNA level changes and hold promise to provide more insights into how post-transcriptional regulation determines phenotypes. In Pseudomonas aeruginosa the methyltransferase PrmC methylates peptide chain release factors to facilitate translation termination...
July 4, 2016: Environmental Microbiology
Claire Gervais, Philippe Ducrotté, Thierry Piche, Mario Di Palma, Nicolas Jovenin, Florian Scotté
Digestive disorders, in particular constipation, are symptoms very often reported by cancer patients as having a major impact on their quality of life. An accurate diagnosis of bowel delayed transit and defecation disorders is required to best adapt therapeutic management. Constipation associated with cancer may be related to several causes, which can be placed in three nosological categories that sometimes overlap: chronic constipation prior to cancer and having its own evolution; constipation related to the cancer condition, in particular the occlusive syndrome, and constipation induced by cancer therapies...
September 2016: Bulletin du Cancer
Christine Grimaldi, Deborah Finco, Madeline M Fort, Daniel Gliddon, Kirsty Harper, Whitney S Helms, Jane A Mitchell, Raegan O'Lone, Stanley T Parish, Marie-Soleil Piche, Daniel M Reed, Gabriele Reichmann, Patricia C Ryan, Richard Stebbings, Mindi Walker
In October 2013, the International Life Sciences Institute - Health and Environmental Sciences Institute Immunotoxicology Technical Committee (ILSI-HESI ITC) held a one-day workshop entitled, "Workshop on Cytokine Release: State-of-the-Science, Current Challenges and Future Directions". The workshop brought together scientists from pharmaceutical, academic, health authority, and contract research organizations to discuss novel approaches and current challenges for the use of in vitro cytokine release assays (CRAs) for the identification of cytokine release syndrome (CRS) potential of novel monoclonal antibody (mAb) therapeutics...
September 2016: Cytokine
Gwendoline Degueurce, Ilenia D'Errico, Christine Pich, Mark Ibberson, Frédéric Schütz, Alexandra Montagner, Marie Sgandurra, Lionel Mury, Paris Jafari, Akash Boda, Julien Meunier, Roger Rezzonico, Nicolò Costantino Brembilla, Daniel Hohl, Antonios Kolios, Günther Hofbauer, Ioannis Xenarios, Liliane Michalik
Although excessive exposure to UV is widely recognized as a major factor leading to skin perturbations and cancer, the complex mechanisms underlying inflammatory skin disorders resulting from UV exposure remain incompletely characterized. The nuclear hormone receptor PPARβ/δ is known to control mouse cutaneous repair and UV-induced skin cancer development. Here, we describe a novel PPARβ/δ-dependent molecular cascade involving TGFβ1 and miR-21-3p, which is activated in the epidermis in response to UV exposure...
2016: EMBO Molecular Medicine
Vinidhra Sridharan, Yoshiaki Azuma
Polo-like kinase 1 (Plk1)-interacting checkpoint helicase (PICH) localizes at the centromere and is critical for proper chromosome segregation during mitosis. However, the precise molecular mechanism of PICH's centromeric localization and function at the centromere is not yet fully understood. Recently, using Xenopus egg extract assays, we showed that PICH is a promiscuous SUMO binding protein. To further determine the molecular consequence of PICH/SUMO interaction on PICH function, we identified three SUMO-interacting motifs (SIMs) on PICH and generated a SIM-deficient PICH mutant...
May 26, 2016: Cell Cycle
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