PUBLICATION ALERT : Nature Cell Biology - EPFL - Lausanne.
Chemotherapy elicits pro-metastatic extracellular vesicles in breast cancer models
In this high impact scientific communication the authors demonstrate how, contrary to expectations, the two chemotherapy agents, Paclitaxel (PTX) and Doxorubicin (DOX) can promote tumor metastasis by inducing release of extracellular vesicles (EVs) from primary tumors. They used the PhotonIMAGERTM OPTIMA to demonstrate increased tumour growth in WT mice pre-conditioned with EVs prepared from 4T1 tumor bearing mice, which had been treated with PTX (PTX-EVs) compared to control CREMO-EVs. In contrast, Ccr2-KO mice did not show increase tumor growth when treated with PTX-EVs, thus suggesting a role for monocyte chemotaxis in PTX-EV mediated tumour enhancement. The researchers also observed enrichment of the Ca2+-dependant membrane-binding protein Annexin A6 (ANXA6) in PTX-EVs and DOX-EVs. ANXA6 is known to regulate membrane trafficking and cell signalling. The team then showed that the pro-metastatic capacity of chemotherapy-elicited EVs was dependent on Ly6C+CCR2+ monocytes and Annexin VI expression.
Ioanna Keklikoglou, Chiara Cianciaruso, Esra Güç2, Mario Leonardo Squadrito, Laura M. Spring3, Simon Tazzyman, Lore Lambein, Amanda Poissonnier, Gino B. Ferraro, Caroline Baer, Antonino Cassará, Alan Guichard, M. Luisa Iruela-Arispe, Claire E. Lewis,Lisa M. Coussens, Aditya Bardia, Rakesh K. Jain, Jeffrey W. Pollard and Michele De Palma
PUBLICATION ALERT : ONCOTARGET - CRCINA, INSERM - Nantes.
Sensitivity of pre-targeted immunoPET using 68Ga-peptide to detect colonic carcinoma liver metastases in a murine xenograft model: Comparison with 18FDG PET-CT
In this report the scientific team from CRCINA, INSERM Nantes demonstrated the improved performance of pretargeted immunoPET imaging with 68Ga-probes compared to gold standard 18FDG-PET in an orthotopic murine xenograft model of human colonic liver metastases. They used the PhotonIMAGERTM RT system to validate tumor implantation post intra-portal injection of luciferase transfected LS174T cells in nude mice and quantify Hepatic tumor burden prior to PET imaging.
Fanny Foubert, Sébastien Gouard, Catherine Saï-Maurel, Michel Chérel, Alain Faivre-Chauvet, David M. Goldenberg, Jacques Barbet, Clément Bailly, Caroline Bodet-Milin, Thomas Carlier, Françoise Kraeber-Bodéré, Yann Touchefeu and Eric Frampas.
PUBLICATION ALERT : JOURNAL OF CONTROLLED RELEASE - Pharos University in Alexandria, Egypt
Oral vitamin-A-coupled valsartan nanomedicine: High hepatic stellate cell receptors accessibility and prolonged enterohepatic residence
In this scientific report, a scientific team from Alexandria, Egypt, studied the therapeutic potentials of orally administered Vitamin A (VA) coupled Valsartan-loaded liposomes (VLCs) in a rat model of CCL4-induced liver fibrosis. They used the PhotonIMAGERTM OPTIMA to quantify relocation of Nile Red labelled VA coupled VLCs from the intestine to the liver upon onset of fibrosis for several days by Ex vivo fluorescence imaging. Confocal microscopy examination of immunofluorescently-stained HSCs in liver sections confirmed nuclear uptake of VLCs in hepatic stellate cells, in accordance with Valsartan’s mode of action. The authors concluded that VA coupled nanocarriers represented a promising targeted delivery method for oral administration of Valsartan in antifibrotic therapy.
Nesrine S. El-Mezayen, Wessam F. El-Hadidy, Wessam M. El-Refaie, Thanaa I. Shalaby, Mahmoud M. Khattab, Aiman S. El-Khatib
PUBLICATION ALERT : NATURE COMMUNICATIONS - Institut Cochin, Paris, France.
The histone demethylase Phf2 acts as a molecular checkpoint to prevent NAFLD progression during obesity.
In this report the french scientific team from the INSERM, U1016/CNRS, UMR8104 studied the involvement of aberrant histone methylation in Non Alcoholic Fatty Liver Disease (NAFLD). They identified the histone demethylase Plant Homeodomain Finger 2 (Phf2) as a new co-activator of the transcription factor Carbohydrate Responsive Element Binding Protein (ChREBP) and established its role as a downstream epigenetic checkpoint, protecting the liver from the pathogenesis progression through facilitating H3K9me2 demethylation at specific gene promoters.
They used the PhotonIMAGERTM system to compare activation of ChREBP-regulated
The Authors concluded that Phf2 facilitates
Julien Bricambert, Marie-Clotilde Alves-Guerra, Pauline Esteves, Carina Prip-Buus, Justine Bertrand-Miche, Hervé Guillou , Christopher J. Chang, Mark N. Vander Wal, François Canonne-Hergaux, Philippe Mathurin, Violeta Raverdy, François Pattou, Jean Girard, Catherine Postic & Renaud Dentin.
PUBLICATION ALERT : SCIENCE ADVANCES - Karolinska institute, Sweden.
Mannan-induced Nos2 in macrophages enhances IL-17–driven psoriatic arthritis by innate lymphocytes.
In this report, the authors studied the pathogenic role of Nitric Oxide (NO) in a mouse model for
In particular, they investigated the effect of inhibition of the nitric oxide synthase (NOS2) and/or the nicotinamide adenine dinucleotide phosphate oxidase 2 (NOX2) on mannan-induced NO release.
Mannan-induced NO production was measured indirectly using Luminol-based L-012, which react with peroxynitrite, a down-product of NO. L-012 chemiluminescence was quantified with the Photon IMAGERTM Optima.
Inhibition of NOS2 with
The authors concluded that Mannan NO production can be induced by mannan in a NOS2 dependent manner and that mannan-induced NO-derived peroxynitrite is dependent on NOX2-derived superoxide.
Jianghong Zhong, Tatjana Scholz, Anthony C. Y. Yau, Simon Guerard, Ulrike Hüffmeier,Harald Burkhardt, Rikard Holmdahl.
PUBLICATION ALERT : ICAN, Paris - DIABETHES, 2018
The ceramide transporter CERT is involved in muscle insulin signaling defects under lipotoxic conditions.
In this scientific report, the authors investigated the importance of CERT in lipid induced insulin resitance .
Amongst other experiments, the researchers used digital autoradiography to study the effect of C2C12 myotubes treatment with the CERT inhibitor HPA12 on [3H]-Sphingosine conversion to [3H]-ceramide, [3H]-Sphingomyosine and [3H]-GlcCer.
C2C12 lipid extracts resolved by High performance Liquid chromatography were quantified by direct analysis of the HTPLC plates on the BetaIMAGER Tracer.
The results showed that most of the [3H]-sphingosine down-products were associated with ceramide and that CERT inhibition with HPA12 or palmitate treatment substantially reduced sphingomyelin (SM) production and no effect on Ceramide or GlcCer biosynthesis.
Cécile L. Bandet, Rana Mahfouz, Julien Véret, Athanassia Sotiropoulos, Maxime Poirier, Paola Giussani, Mélanie Campana, Erwann Philippe, Agnieszka Blachnio-Zabielska, Raphaëlle Ballaire, Xavier Le Liepvre, Olivier Bourron, Dušan Berkeš, Jan Górski, Pascal Ferré, Hervé Le Stunff, Fabienne Foufelle and Eric Hajduch*
PUBLICATION ALERT : UNICAEN, INSERM UMR-S U1237 - Theranostics 2018
Anesthesia Inhibits the Activity of the "Glymphatic System”
In this report, the researchers from Caen University Hospital (CHU Caen) took advantage of the PhotonIMAGER RT’s intensified CCD, which can : " dramatically increase the signal to noise ratio of NIRF signals" thanks to its fluorescence photocounting mode. NIRF acquisition times could be reduced to 22 ms, allowing
Using this functionality to investigate CSF circulation amid the glymphatic system hypothesis, the authors could observe a substancial increase in Indocyaning Green diffusion to the forebrain of non-anesthetized mice whilst the marker remained located in the cisterna magna of anesthetised animals. This findings, confirmed by MRI and ex vivo fluorometry analysis, strongly suggest that parenchymal CSF circulation is mainly active during wakefulness and significantly impaired during general anesthesia.
Clement Gakuba, Thomas Gaberel, Suzanne Goursaud, Jennifer Bourges, Camille Di Palma, Aurélien Quenault, Sara Martinez de Lizarrondo, Denis Vivien, Maxime Gauberti.
PUBLICATION ALERT : Nuclear Medicine Dept, University Hospital, Nantes - OncoTarget 2018
Comparison of Immuno-PET of CD138 and PET imaging with 64CuCl2 and 18F-FDG in a preclinical syngeneic model of multiple myeloma
In this report, the research team from University Hospital Nantes used the PhotonIMAGER RT to validate 64Cu-labeled anti-CD138 murine antibody PET localization Data in a multiple myeloma syngeneic mouse model.
Clément Bailly, Sébastien Gouard, Marie Lacombe, Patricia Remaud-Le Saëc, Benjamin Chalopin, Mickaël Bourgeois, Nicolas Chouin, Raphaël Tripier, Zakaria Halime, Ferid Haddad, Alain Faivre-Chauvet, Françoise Kraeber-Bodéré, Michel Chérel, and Caroline Bodet-Milin.
PUBLICATION ALERT : Inserm U1026, Bordeaux - Nature Scientific Reports - 2017
In situ printing of mesenchymal stromal cells, by laser-assisted bioprinting, for in vivo bone regeneration applications
In this report, researchers from Bordeaux university used the PhotonIMAGERTM RT to assess proliferation of multipotent bone marrow stromal precursor cells implanted in situ by laser assisted bioprinting (LAB) in a calvaria defect mouse model.
Virginie Keriquel, Hugo Oliveira, Murielle Rémy, Sophia Ziane, Samantha Delmond, Benoit Rousseau, Sylvie Rey, Sylvain Catros, Joelle Amédée, Fabien Guillemot & Jean-Christophe Fricain.
PUBLICATION ALERT : ETH Zurich - Psychopharmacology - 2017
The role of beta-arrestin2 in shaping fMRI BOLD responses to dopaminergic stimulation
In this report the authors used the digital autoradigraphy BetaIMAGER TRacer system to validate binding of tritiated ligands for for D1R, D2/3R, dopamine transporter (DAT) and vesdicular monoamine transporter-2 (VMAT2) in Wild-Type and beta-arrestin2 K/O mice before functional analysis by fMRI.
Kristoffer Sahlholm, Giovanna D. Ielacqua, Jinbin Xu, Lynne A. Jones, Felix Schlege, Robert H. Mach, Markus Rudin and Aileen Schroeter
PUBLICATION ALERT : INSERM - Nature communications - 2017
PUBLICATION ALERT : VUB / UZB - Mol Imaging Biol 2017
Improved Debulking of Peritoneal Tumor Implants by Near-Infrared Fluorescent Nanobody Image Guidance in an Experimental Mouse Model.
In this report the scientific teams from UVB and UZ Brussels used the PhotonIMAGER Optima to validate surgical efficiency of a debulking technique by fluorescence guided surgery using a NIR-labeled nanobody against HER2-positive tumors.
PUBLICATION ALERT: BARC - News Letter 2017
Potential of Luminescence Based Molecular Animal Imaging in Research Areas Pertaining to Cancer Biology and Therapy
PUBLICATION ALERT: Pharos University - Journal of Controlled Release
Hepatic stellate cell-targeted imatinib nanomedicine versus conventional imatinib: A novel strategy with potent efficacy in experimental liver fibrosis
PUBLICATION ALERT: Cardiff University - Molecular Biosciences Research Division . BIOTECHNOLOGY AND BIOENGINEERING.
ΔFlucs: Brighter Photinus pyralis firefly luciferases identified by surveying consecutive single amino acid deletion mutations in a thermostable variant
Publication Alert : CMIRO, Brussels /CMMI, Gosselies, Belgium - STEM CELLS AND DEVELOPMENT
Long-term In Vivo Monitoring of Adult-Derived Human Liver Stem/Progenitor Cells by Bioluminescence Imaging, Positron Emission Tomography, and Contrast-Enhanced Computed Tomography
Publication Alert : CEA - Cyceron - Caen - PLOSOne
[18F]Fludarabine-PET in a murine model of multiple myeloma
Publication Alert : Keele University - Acta Biomaterialia
Defining a turnover index for
the correlation of biomaterial degradation and cell basedextracellular matrix synthesis
using fluorescent tagging techniques
Defining a turnover index for the correlation of biomaterial degradation and cell basedextracellular matrix synthesis using fluorescent tagging techniques
New poster of Sanofi Pasteur for AFSTAL congress in Nantes