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https://www.readbyqxmd.com/read/29353106/perineurium-like-sheath-derived-from-long-term-surviving-mesenchymal-stem-cells-confers-nerve-protection-to-the-injured-spinal-cord
#1
Yuan-Huan Ma, Xiang Zeng, Xue-Cheng Qiu, Qing-Shuai Wei, Ming-Tian Che, Ying Ding, Zhou Liu, Guo-Hui Wu, Jia-Hui Sun, Mao Pang, Li-Min Rong, Bin Liu, Zaid Aljuboori, Inbo Han, Eng-Ang Ling, Yuan-Shan Zeng
The functional multipotency enables mesenchymal stem cells (MSCs) promising translational potentials in treating spinal cord injury (SCI). Yet the fate of MSCs grafted into the injured spinal cord has not been fully elucidated even in preclinical studies, rendering concerns of their safety and genuine efficacy. Here we used a rat spinal cord transection model to evaluate the cell fate of allograft bone marrow derived MSCs. With the application of immunosuppressant, donor cells, delivered by biocompatible scaffold, survived up to 8 weeks post-grafting...
January 11, 2018: Biomaterials
https://www.readbyqxmd.com/read/29352409/recent-perspectives-on-the-molecular-basis-of-biofilm-formation-by-pseudomonas-aeruginosa-and-approaches-for-treatment-and-biofilm-dispersal
#2
REVIEW
Sinosh Skariyachan, Vaishnavi Sneha Sridhar, Swathi Packirisamy, Supreetha Toplar Kumargowda, Sneha Basavaraj Challapilli
Pseudomonas aeruginosa, a Gram-negative, rod-shaped bacterium causes widespread diseases in humans. This bacterium is frequently related to nosocomial infections such as pneumonia, urinary tract infections (UTIs) and bacteriaemia especially in immunocompromised patients. The current review focuses on the recent perspectives on biofilms formation by these bacteria. Biofilms are communities of microorganisms in which cells stick to each other and often adhere to a surface. These adherent cells are usually embedded within a self-produced matrix of extracellular polymeric substance (EPS)...
January 19, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29349097/universal-method-for-the-purification-of-recombinant-aav-vectors-of-differing-serotypes
#3
Shelley A Nass, Maryellen A Mattingly, Denise A Woodcock, Brenda L Burnham, Jeffrey A Ardinger, Shayla E Osmond, Amy M Frederick, Abraham Scaria, Seng H Cheng, Catherine R O'Riordan
The generation of clinical good manufacturing practices (GMP)-grade adeno-associated virus (AAV) vectors requires purification strategies that support the generation of vectors of high purity, and that exhibit a good safety and efficacy profile. To date, most reported purification schemas are serotype dependent, requiring method development for each AAV gene therapy product. Here, we describe a platform purification process that is compatible with the purification of multiple AAV serotypes. The method generates vector preparations of high purity that are enriched for capsids with full vector genomes, and that minimizes the fractional content of empty capsids...
June 15, 2018: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29345048/urinary-incontinence-type-symptoms-and-quality-of-life-a-comparison-between-grand-multipara-and-non-grand-multipara-women-aged-%C3%A2-50-years
#4
Iris Shlain, Yuval Lavy, Revital Arbel, David Shveiky, Anna Woloski Wruble, Michal Liebergall-Wischnitzer
AIM: Parity and age are risk factors for urinary incontinence (UI). The aim of this study was to compare grand multipara women (GMP) to non-grand multipara (NGMP) women concerning UI types (stress urinary incontinence [SUI], urge urinary incontinence [UUI]), symptoms, and quality of life. METHODS: This correlation-comparative study used three tools: a demographic/health questionnaire, Questionnaire for Urinary Incontinence Diagnosis (QUID), and Incontinence Quality of Life (I-QOL)...
January 18, 2018: Japan Journal of Nursing Science: JJNS
https://www.readbyqxmd.com/read/29342134/chromosomal-instability-drives-metastasis-through-a-cytosolic-dna-response
#5
Samuel F Bakhoum, Bryan Ngo, Ashley M Laughney, Julie-Ann Cavallo, Charles J Murphy, Peter Ly, Pragya Shah, Roshan K Sriram, Thomas B K Watkins, Neil K Taunk, Mercedes Duran, Chantal Pauli, Christine Shaw, Kalyani Chadalavada, Vinagolu K Rajasekhar, Giulio Genovese, Subramanian Venkatesan, Nicolai J Birkbak, Nicholas McGranahan, Mark Lundquist, Quincey LaPlant, John H Healey, Olivier Elemento, Christine H Chung, Nancy Y Lee, Marcin Imielenski, Gouri Nanjangud, Dana Pe'er, Don W Cleveland, Simon N Powell, Jan Lammerding, Charles Swanton, Lewis C Cantley
Chromosomal instability is a hallmark of cancer that results from ongoing errors in chromosome segregation during mitosis. Although chromosomal instability is a major driver of tumour evolution, its role in metastasis has not been established. Here we show that chromosomal instability promotes metastasis by sustaining a tumour cell-autonomous response to cytosolic DNA. Errors in chromosome segregation create a preponderance of micronuclei whose rupture spills genomic DNA into the cytosol. This leads to the activation of the cGAS-STING (cyclic GMP-AMP synthase-stimulator of interferon genes) cytosolic DNA-sensing pathway and downstream noncanonical NF-κB signalling...
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29341896/luteinizing-hormone-signaling-phosphorylates-and-activates-the-cyclic-gmp-phosphodiesterase-pde5-in-mouse-ovarian-follicles-contributing-an-additional-component-to-the-hormonally-induced-decrease-in-cyclic-gmp-that-reinitiates-meiosis
#6
Jeremy R Egbert, Siu-Pok Yee, Laurinda A Jaffe
Prior to birth, oocytes within mammalian ovarian follicles initiate meiosis, but then arrest in prophase until puberty, when with each reproductive cycle, one or more follicles are stimulated by luteinizing hormone (LH) to resume meiosis in preparation for fertilization. Within preovulatory follicles, granulosa cells produce high levels of cGMP, which diffuses into the oocyte to maintain meiotic arrest. LH signaling restarts meiosis by rapidly lowering the levels of cGMP in the follicle and oocyte. Part of this decrease is mediated by the dephosphorylation and inactivation the NPR2 guanylyl cyclase in response to LH, but the mechanism for the remainder of the cGMP decrease is unknown...
January 13, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29334871/biomonitoring-of-arsenic-in-woodworkers-exposed-to-cca-and-evaluation-of-other-non-occupational-sources-in-uruguay
#7
Valery Bühl, María Cristina Álvarez, María H Torre, Mariela Pistón, Nelly Mañay
In Uruguay wood-impregnation plants use chromated copper arsenate (CCA) as preservative applying good manufacture practices (GMP). This study aims a retrospective evaluation of toxicologically relevant species levels in CCA exposed woodworker's urine (As-U) and an assessment of the effects of work risk factors and non-occupational sources in As-U of workers from a selected plant. From 2014 to 2016, As-U in 212 urine samples (As-U) of 73 woodworkers from six CCA impregnation plants were determined. In one of these plants, 35 workers were interviewed to obtain individual data of work tasks, lifestyles, diet, habits, etc...
January 15, 2018: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/29332293/measurement-of-cyclic-gmp-during-plant-hypersensitive-disease-resistance-response
#8
Jian Chen, Diana Bellin, Elodie Vandelle
Cyclic guanosine-3',5'-monophosphate (cGMP) is recognized as an important second messenger in plants, mediating intracellular signal in important physiological processes, including the hypersensitive disease resistance response induced by avirulent pathogens. In this context, the analysis of cGMP levels in infected plants requires an accurate and specific detection method allowing its quantification. Here, we describe an assay based on the Alphascreen technology, developed for animal cells and further adapted and optimized for the detection of cGMP in plants...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29331889/l-ascorbic-acid-metabolism-in-an-ascorbate-rich-kiwifruit-actinidia-eriantha-benth-cv-white-during-postharvest
#9
Zhen-Ye Jiang, Yu Zhong, Jian Zheng, Maratab Ali, Guo-Dong Liu, Xiao-Lin Zheng
Kiwifruit (Actinidia eriantha Benth.) 'White', a novel cultivar with higher L-ascorbic acid (AsA) level, is registered in China. Changes in AsA, related metabolites, enzymatic activity, and gene expression associated with AsA biosynthesis and recycling process were investigated in this paper. The results indicated that AsA biosynthesis through L-galactose pathway supplemented by D-galacturonic acid pathway and AsA recycling collectively contributed to accumulating and remaining higher AsA level in kiwifruit cv...
January 6, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29331266/human-papilloma-virus-specific-t-cells-can-be-generated-from-na%C3%A3-ve-t-cells-for-use-as-an-immunotherapeutic-strategy-for-immunocompromised-patients
#10
Sarah E McCormack, Conrad Russell Y Cruz, Kaylor E Wright, Allison B Powell, Haili Lang, Cornelia Trimble, Michael D Keller, Ephraim Fuchs, Catherine M Bollard
Human papilloma virus (HPV) is a known cause of cervical cancer, squamous cell carcinoma and laryngeal cancer. Although treatments exist for HPV-associated malignancies, patients unresponsive to these therapies have a poor prognosis. Recent findings from vaccine studies suggest that T-cell immunity is essential for disease control. Because Epstein-Barr Virus (EBV)-specific T cells have been highly successful in treating or preventing EBV-associated tumors, we hypothesized that the development of a manufacturing platform for HPV-specific T cells from healthy donors could be used in a third-party setting to treat patients with high-risk/relapsed HPV-associated cancers...
January 10, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29330541/19f-perfluorocarbon-labeled-human-peripheral-blood-mononuclear-cells-can-be-detected-in-vivo-using-clinical-mri-parameters-in-a-therapeutic-cell-setting
#11
Corby Fink, Jeffrey M Gaudet, Matthew S Fox, Shashank Bhatt, Sowmya Viswanathan, Michael Smith, Joseph Chin, Paula J Foster, Gregory A Dekaban
A 19Fluorine (19F) perfluorocarbon cell labeling agent, when employed with an appropriate cellular MRI protocol, allows for in vivo cell tracking. 19F cellular MRI can be used to non-invasively assess the location and persistence of cell-based cancer vaccines and other cell-based therapies. This study was designed to determine the feasibility of labeling and tracking peripheral blood mononuclear cells (PBMC), a heterogeneous cell population. Under GMP-compliant conditions human PBMC were labeled with a 19F-based MRI cell-labeling agent in a manner safe for autologous re-injection...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29325108/aging-is-associated-with-a-prefrontal-lateral-medial-shift-during-picture-induced-negative-affect
#12
Carien M van Reekum, Stacey M Schaefer, Regina C Lapate, Catherine J Norris, Patricia A Tun, Margie E Lachman, Carol A Ryff, Richard J Davidson
The capacity to adaptively respond to negative emotion is in part dependent upon lateral areas of the prefrontal cortex (PFC). Lateral PFC areas are particularly susceptible to age-related atrophy, which affects executive function (EF). We used structural and functional magnetic resonance imaging (MRI) to test the hypothesis that older age is associated with greater medial PFC engagement during processing of negative information, and that this engagement is dependent upon the integrity of grey matter structure in lateral PFC as well as EF...
January 8, 2018: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29322423/assessing-the-cgas-cgamp-sting-activity-of-cancer-cells
#13
Geneviève Pépin, Michael P Gantier
DNA sensing by the STING pathway is emerging to be a crucial component of the antitumor immune response. Although it plays a key role in the activation of tumor immune cells, exactly how STING is activated by tumor cells is not fully understood. Recent evidence suggests that cGAS can be directly engaged and produces 2'3'-cyclic-GMP-AMP (cGAMP) within certain tumor cells upon stimulation with DNA damaging agents. Because cGAMP can transfer between adjacent cells, the capacity of tumor cells to produce cGAMP may activate tumor immune cells, even in the absence of functional STING signaling within the tumor...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29314368/spectroscopic-studies-on-photoinduced-reactions-of-the-anticancer-prodrug-trans-trans-trans-pt-n3-2-oh-2-py-2
#14
Peter J Sadler, Robbin Vernooij, Tanmaya Joshi, Michael Horbury, Bim Graham, Ekaterina Izgorodina, Vasilios Stavros, Leone Spiccia, Bayden Wood
The photodecomposition mechanism of trans,trans,trans-[Pt(N3)2(OH)2(py)2] (1, py = pyridine), an anticancer prodrug candidate, was probed using complementary Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR), transient electronic absorption and UV-Vis spectroscopy. Data fitting using Principal Component Analysis (PCA) and multi-curve resolution alternating least squares, suggests the formation of a trans-[Pt(N3)(py)2(OH/H2O)] intermediate and trans [Pt(py)2(OH/H2O)2] as the final product upon 420 nm irradiation of 1 in water...
January 3, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29311282/a-multimodal-strategy-used-by-a-large-c-di-gmp-network
#15
Kurt M Dahlstrom, Alan J Collins, Georgia Doing, Jaclyn N Taroni, Timothy J Gauvin, Casey S Greene, Deborah A Hogan, George A O'Toole
The Pseudomonas fluorescens genome encodes for 50+ proteins predicted to be involved in c-di-GMP signaling. Here, we demonstrate that when tested across 188 nutrients, these enzymes and effectors appear capable of impacting biofilm formation. Transcriptional analysis of network members across ∼50 nutrient conditions indicates that altered gene expression can explain a subset, but not all, of biofilm-formation responses to the nutrients. Additional organization of the network is likely achieved through physical interaction, as determined via probing ∼2000 interactions by bacterial two-hybrid assays...
January 8, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29311281/cyclic-di-gmp-regulates-tfoy-in-vibrio-cholerae-to-control-motility-by-both-transcriptional-and-posttranscriptional-mechanisms
#16
Benjamin R Pursley, Michael M Maiden, Meng-Lun Hsieh, Nicolas Fernandez, Geoffrey B Severin, Christopher M Waters
Cyclic di-GMP (c-di-GMP) is a bacterial second messenger molecule that is a key global regulator in Vibrio cholerae, but the molecular mechanisms by which this molecule regulates downstream phenotypes have not been fully characterized. One such regulatory factor that may respond to c-di-GMP is the Vc2 c-di-GMP-binding riboswitch that is hypothesized to control the expression of the downstream putative transcription factor TfoY. Although much is known about the physical and structural properties of the Vc2 riboswitch aptamer, the nature of its expression and function in V...
January 8, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29306799/purine-salvage-in-plants
#17
REVIEW
Hiroshi Ashihara, Claudio Stasolla, Tatsuhito Fujimura, Alan Crozier
Purine bases and nucleosides are produced by turnover of nucleotides and nucleic acids as well as from some cellular metabolic pathways. Adenosine released from the S-adenosyl-L-methionine cycle is linked to many methyltransferase reactions, such as the biosynthesis of caffeine and glycine betaine. Adenine is produced by the methionine cycles, which is related to other biosynthesis pathways, such those for the production of ethylene, nicotianamine and polyamines. These purine compounds are recycled for nucleotide biosynthesis by so-called "salvage pathways"...
January 4, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29304838/a-protocol-to-isolate-and-qualify-purified-human-preantral-follicles-in-cases-of-acute-leukemia-for-future-clinical-applications
#18
Elodie Mouloungui, Tristan Zver, Christophe Roux, Clotilde Amiot
BACKGROUND: Autotransplantation of cryopreserved ovarian cortex can be associated with a risk of cancer cell reseeding. This issue could be eliminated by grafting isolated preantral follicles. Collagenase NB6 is an enzyme produced under good manufacturing practices (GMP) in compliance with requirements for tissue engineering and transplantation in humans and thus can be used to isolate preantral follicles from ovarian tissue in the framework of further clinical applications. Multicolor flow cytometry is an effective tool to evaluate the potential contamination of follicular suspensions by leukemic cells...
January 5, 2018: Journal of Ovarian Research
https://www.readbyqxmd.com/read/29301746/cyclic-gmp-elevating-agents-suppress-polyposis-in-apc-min-mice-by-targeting-the-preneoplastic-epithelium
#19
Sarah K Sharman, Bianca N Islam, Yali Hou, Nagendra Singh, Franklin G Berger, Subbaramiah Sridhar, Wonsuk Yoo, Darren D Browning
The cGMP signaling axis has been implicated in the suppression of intestinal cancers but the inhibitory mechanism and the extent to which this pathway can be targeted remains poorly understood. The present study has tested the effect of cGMP-elevating agents on tumorigenesis in the ApcMin/+ mouse model of intestinal cancer. Treatment of ApcMin/+ mice with the receptor guanylyl-cyclase C (GCC) agonist linaclotide, or the phosphodiesterase-5 (PDE5) inhibitor sildenafil, significantly reduced the number of polyps per mouse (67% and 50% respectively)...
January 4, 2018: Cancer Prevention Research
https://www.readbyqxmd.com/read/29288461/screening-of-c-di-gmp-regulated-exopolysaccharides-in-host-interacting-bacteria
#20
Jochen Schmid, Broder Rühmann, Volker Sieber, Lorena Romero-Jiménez, Juan Sanjuán, Daniel Pérez-Mendoza
Bacterial exopolysaccharides (EPS) often confer a survival advantage by protecting the cell against abiotic and biotic stresses, including host defensive factors. They are also main components of the extracellular matrix involved in cell-cell recognition, surface adhesion and biofilm formation. Biosynthesis of a growing number of EPS has been reported to be regulated by the ubiquitous second messenger c-di-GMP, which promotes the transition to a biofilm mode of growth in an intimate association with the eukaryotic host...
2018: Methods in Molecular Biology
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