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https://www.readbyqxmd.com/read/28638769/deeper-insight-into-the-six-step-domino-reaction-of-aldehydes-with-malononitrile-and-evaluation-of-antiviral-and-antimalarial-activities-of-the-obtained-bicyclic-products
#1
Christina M Bock, Gangajji Parameshwarappa, Simon Bönisch, Walter Bauer, Corina Hutterer, Maria Leidenberger, Oliver Friedrich, Manfred Marschall, Barbara Kappes, Andreas Görling, Svetlana B Tsogoeva
The straightforward and efficient synthesis of complex aza- and carbobicyclic compounds, which are of importance for medicinal chemistry, is a challenge for modern chemical methodology. An unprecedented metal-free six-step domino reaction of aldehydes with malononitrile was presented in our previous study to provide, in a single operation, these bicyclic nitrogen-containing molecules. Presented here is a deeper investigation of this atom-economical domino process by extending the scope of aldehydes, performing post-modifications of domino products, applying bifunctional organocatalysts and comprehensive NMR studies of selected domino products...
June 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28637474/arsenic-trioxide-inhibits-ebv-reactivation-and-promotes-cell-death-in-ebv-positive-lymphoma-cells
#2
Qinyan Yin, Mark Sides, Christopher H Parsons, Erik K Flemington, Joseph A Lasky
BACKGROUND: Epstein-Barr Virus (EBV) is associated with hematopoietic malignancies, such as Burkitt's lymphoma, post-transplantation lymphoproliferative disorder, and diffuse large B-cell lymphoma. The current approach for EBV-associated lymphoma involves chemotherapy to eradicate cancer cells, however, normal cells may be injured and organ dysfunction may occur with currently employed regimens. This research is focused on employing arsenic trioxide (ATO) as EBV-specific cancer therapy takes advantage of the fact the EBV resides within the malignant cells...
June 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28637105/cytomegalovirus-gastric-ulcer-complicated-with-pyloric-obstruction-in-a-patient-with-ulcerative-colitis
#3
Sung Hwan Kang, Kee Myung Lee, Sung Jae Shin, Sun Kyo Lim, Jae Chul Hwang, Jin Hong Kim
In patients with inflammatory bowel disease (IBD), cytomegalovirus (CMV) infections could aggravate the course of IBD but it is difficult to distinguish CMV infection from IBD exacerbation endoscopically. Usually, CMV tends to localize to the colon and other organic involvements were reported very rare in the IBD patients. Herein, we report a case that CMV gastric ulcer complicated with pyloric obstruction in a patient with ulcerative colitis during ganciclovir therapy, which was resolved by surgical gastrojejunostomy with review of literature...
June 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28632911/polymer-functionalized-gold-nanoparticles-as-non-viral-gene-delivery-reagents
#4
M Mar Encabo-Berzosa, Maria Sancho-Albero, Victor Sebastian, Silvia Irusta, Manuel Arruebo, Jesus Santamaria, Pilar Martín Duque
BACKGROUND: In this study we investigated the ability of PEG functionalized gold nanoparticles as non-viral vectors in the transfection of different cell lines, comparing them with commercial lipoplexes. METHODS: Positively charged gold nanoparticles were synthesized using PEI as reducing and stabilizer agent and its cytotoxicity reduced by its functionalization with PEG. We bound the nanoparticles to three plasmids with different sizes (4-40 kpb). The vector internalization was evaluated by confocal and electronic microscopy...
June 20, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/28624190/expression-of-herpes-simplex-virus-thymidine-kinase-ganciclovir-by-rna-trans-splicing-induces-selective-killing-of-hiv-producing-cells
#5
Carin K Ingemarsdotter, Sushmita Poddar, Sarah Mercier, Volker Patzel, Andrew M L Lever
Antiviral strategies targeting hijacked cellular processes are less easily evaded by the virus than viral targets. If selective for viral functions, they can have a high therapeutic index. We used RNA trans-splicing to deliver the herpes simplex virus thymidine kinase-ganciclovir (HSV-tk/GCV) cell suicide system into HIV-producing cells. Using an extensive in silico bioinformatics and RNA structural analysis approach, ten HIV RNA trans-splicing constructs were designed targeting eight different HIV splice donor or acceptor sites and were tested in cells expressing HIV...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28583524/epidemiology-and-outcome-of-ganciclovir-resistant-cytomegalovirus-infection-after-solid-organ-transplantation-a-single-transplant-center-experience-in-thailand
#6
J Bruminhent, P Rotjanapan, S P Watcharananan
BACKGROUND: Data on drug-resistant cytomegalovirus (CMV) infection in solid organ transplantation (SOT) are not often reported from resource-limited settings. We aimed to investigate the epidemiology and outcomes of this infection in SOT recipients at our institution. METHODS: This was a retrospective study conducted from January 2012 to May 2015. We included all SOT recipients who were suspected for drug-resistant CMV infection. Genotypic assay for UL97 gene mutation was analyzed by real-time polymerase chain reaction...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28552580/engineered-proteins-program-mammalian-cells-to-target-inflammatory-disease-sites
#7
Anam Qudrat, Abdullah Al Mosabbir, Kevin Truong
Disease sites in atherosclerosis and cancer feature cell masses (e.g., plaques/tumors), a low pH extracellular microenvironment, and various pro-inflammatory cytokines such as tumor necrosis factor α (TNFα). The ability to engineer a cell to seek TNFα sources allows for targeted therapeutic delivery. To accomplish this, here we introduced a system of proteins: an engineered TNFα chimeric receptor (named TNFR1chi), a previously engineered Ca(2+)-activated RhoA (named CaRQ), vesicular stomatitis virus glycoprotein G (VSVG), and thymidine kinase...
June 22, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28545358/molecular-imaging-of-tumor-angiogenesis-and-therapeutic-effects-with-dual-bioluminescence
#8
Ran Wang, Kaiyue Zhang, Hongyan Tao, Wei Du, Di Wang, Ziwei Huang, Manqian Zhou, Yang Xu, Yuebing Wang, Na Liu, Hui Wang, Zongjin Li
BACKGROUND: Angiogenesis is critical for the growth of tumor by supplying nutrients and oxygen that exacerbates the metastasis and progression of cancer. Noninvasive imaging of angiogenesis during the tumor therapeutic processes may provide novel opportunities for image-guided tumor management. OBJECTIVE: Here, we want to develop a mouse animal model for assessing cancer progression and angiogenesis in the same individuals by molecular imaging. METHODS: Breast cancer model was developed with mouse breast cancer cell line 4T1 carrying a reporter system encoding a triple fusion (TF) reporter gene consisting of renilla luciferase (Rluc), red fluorescent protein (RFP) and herpes simplex virus truncated thymidine kinase (HSV-ttk) in transgenic mice, which expressed firefly luciferase (Fluc) under the promoter of vascular endothelial growth factor receptor 2 (Vegfr2-luc)...
May 23, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28513810/epstein-barr-virus-encephalitis-in-solid-organ-transplantation
#9
Jillian S Y S Y, Zhi Mei Low, Iain Abbott, Lani Shochet, John Kanellis, Richard A Kitching, Tony M Korman
Epstein-Barr virus (EBV) is typically associated with post transplant lymphoproliferative disease (PTLD) after solid organ and stem cell transplantation. However, it is rarely associated with neurological complications. We report a case of severe encephalitis complicating primary EBV infection six months post renal transplantation, and review the literature on EBV encephalitis in solid organ transplantation in adults. A 55-year-old male presented 6 months post cadaveric renal transplant with headache, fever and confusion...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28505517/a-modified-adenovirus-vector-mediated-antibody-screening-method-identifies-epha2-as-a-cancer-target
#10
Toshihiro Tanaka, Hiromi Yamada, Masahide Kuroki, Shohta Kodama, Kazuo Tamura, Yasushi Takamatsu
BACKGROUND: We constructed a genetically modified adenovirus vector incorporating an IgG Fc-binding motif from staphylococcal protein A, Z33 (Adv-FZ33). Adv-FZ33 allows an antibody to redirect the vector to a target molecule on the cell surface. We attempted to search for target antigen candidates and antibodies that allowed highly selective gene transduction into malignant tumors. METHODS: Hybridoma libraries producing monoclonal antibodies (mAbs) were screened that increased transduction efficiency in cancer cell lines after cross-linking with Adv-FZ33...
May 12, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28489788/cytomegalovirus-retinitis-in-a-patient-with-secondary-acute-lymphosarcoma-leukemia-undergoing-allogeneic-hematopoietic-stem-cell-transplantation-a-rare-case-report-a-care-compliant-article
#11
Ning Zhao, Lei Liu, Junjie Xu
RATIONALE: Cytomegalovirus (CMV) retinitis is a common opportunistic infection in immunocompromised patients, which may lead to blindness. CMV retinitis is not an uncommon infectious disease in patients with immune regulatory abnormalities, for example, human immunodeficiency virus (HIV) patients. However, CMV retinitis in a patient with acute lymphosarcoma leukemia (ALL) undergoing allogeneic hematopoietic stem-cell transplantation (HSCT) phase is very rare. PATIENT CONCERNS: A case of CMV retinitis in a patient receiving immunosuppressive therapy as a part of ALL allogeneic HSCT is described including the pathogenesis, clinical signs, and therapy...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28489722/bilateral-herpetic-keratitis-after-bilateral-intravitreal-bevacizumab-for-exudative-macular-degeneration
#12
Angeline M Derham, Eric Chen, Vatinee Y Bunya, Ronan E OʼMalley
PURPOSE: To report a case of bilateral herpetic epithelial keratitis after bilateral intravitreal bevacizumab injections for the treatment of exudative age-related macular degeneration. METHODS: A 66-year-old man with diabetes and an extensive history of bilateral anti-vascular endothelial growth factor treatments for exudative age-related macular degeneration received an intravitreal bevacizumab injection in the right eye and triple therapy (bevacizumab, photodynamic therapy, and triamcinolone acetonide) in the left eye...
July 2017: Cornea
https://www.readbyqxmd.com/read/28481774/a-common-anti-cmv-drug-ganciclovir-inhibits-hiv-1-replication-in-human-tissues-ex-vivo
#13
Christophe Vanpouille, Jean A Bernatchez, Andrea Lisco, Anush Arakelyan, Elisa Saba, Matthias Götte, Leonid Margolis
: Cytomegalovirus (CMV) is a common HIV-1 copathogen. Since CMV infection is an important contributor to immune activation, the driving force of HIV disease, an anti-CMV strategy might be beneficial to HIV-infected patients. Shin et al. reported that anti-CMV therapy with valganciclovir in coinfected individuals results in a decrease of HIV viral load that is not accompanied by a decrease of immune activation. This suggests an alternative mechanism for HIV inhibition other than suppression of CMV-mediated inflammation...
May 5, 2017: AIDS
https://www.readbyqxmd.com/read/28478671/autonomous-cell-migration-to-csf1-sources-via-a-synthetic-protein-based-system
#14
Anam Qudrat, Kevin Truong
Inflammatory lesions, often seen in diseases such as rheumatoid arthritis, atherosclerosis and cancer, feature an acidic (i.e., low pH) microenvironment rampant with cytokines, such as CSF1. For potential therapeutic intervention targeted at these CSF1 sources, we have assembled a system of four proteins inside a cell (i.e., HEK293) that initially had no natural CSF1-seeking ability. This system included a newly engineered CSF1 chimera receptor (named CSF1Rchi), the previously engineered Ca(2+) activated RhoA (i...
May 10, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28459452/targeting-genomic-rearrangements-in-tumor-cells-through-cas9-mediated-insertion-of-a-suicide-gene
#15
Zhang-Hui Chen, Yan P Yu, Ze-Hua Zuo, Joel B Nelson, George K Michalopoulos, Satdatshan Monga, Silvia Liu, George Tseng, Jian-Hua Luo
Specifically targeting genomic rearrangements and mutations in tumor cells remains an elusive goal in cancer therapy. Here, we used Cas9-based genome editing to introduce the gene encoding the prodrug-converting enzyme herpes simplex virus type 1 thymidine kinase (HSV1-tk) into the genomes of cancer cells carrying unique sequences resulting from genome rearrangements. Specifically, we targeted the breakpoints of TMEM135-CCDC67 and MAN2A1-FER fusions in human prostate cancer or hepatocellular carcinoma cells in vitro and in mouse xenografts...
June 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28446569/differentiated-levels-of-ganciclovir-resistance-conferred-by-mutations-at-codons-591-603-of-the-cytomegalovirus-ul97-kinase-gene
#16
Sunwen Chou, Ronald J Ercolani, Adam L Vanarsdall
Diagnostic mutations in the cytomegalovirus UL97 kinase gene are used to assess the level of associated ganciclovir resistance and therapeutic options. The best-known mutations at codons 460, 520 or 591-607 individually confer 5- to 10-fold decreased ganciclovir susceptibility, except 3-fold in the case of amino acid substitution C592G. Less common point and in-frame deletion mutations at codons 591-603 remain incompletely characterized. The ganciclovir susceptibilities of 17 mutants in this codon range were evaluated by use of the same recombinant phenotyping system and extensive assay replicates in two types of cell cultures...
April 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28446488/eculizumab-in-a-child-with-atypical-haemolytic-uraemic-syndrome-and-haemophagocytic-lymphohistiocytosis-triggered-by-cytomegalovirus-infection
#17
Gloria M Fraga-Rodriguez, Sonia Brió-Sanagustin, Eulalia Turón-Viñas, Bradley P Dixon, Eduardo Carreras-González
We present the case of a 21-month-old girl with two rare and life-threatening conditions, atypical haemolytic uraemic syndrome (aHUS) and haemophagocytic lymphohistiocytosis (HLH), triggered by a cytomegalovirus (CMV) infection. Soon after admission, the girl became anuric and required continuous venovenous haemodiafiltration.Initial treatments included methylprednisolone, fibrinogen and plasma infusion (for HLH), plasmapheresis (for thrombotic microangiopathy), immunoglobulins (for inflammation), ganciclovir (for CMV infection) and the antibiotic cefotaxime...
April 26, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28445302/cholestasis-caused-by-panhypopituitarism-and-acquired-cytomegalovirus-infection-in-a-2-month-old-male-infant-a-case-report
#18
U Chan, Wai-Tao Chan, Wei-Hsin Ting, Che-Sheng Ho, Hsi-Che Liu, Hung-Chang Lee
RATIONALE: Septo-optic dysplasia (SOD) is a rare congenital disorder that may cause jaundice in infants. However, it is usually prone to neglect and misdiagnosis in infants with cholestasis because endocrine disorder such as panhypopituitarism is rare in the cause of infantile cholestasis. We report a case of SOD concurrent with acquired cytomegalovirus (CMV) infection, who presented with prolonged jaundice as the first clinical sign. PATIENT CONCERNS: The patient was a 2-month-old male infant who presented with cholestasis, combined with fever and panhypopituitarism...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28434069/herpes-zoster-keratitis-development-after-acute-retinal-necrosis
#19
Waseem H Ansari, Francesco Pichi, Paula E Pecen, Careen Y Lowder, Sunil K Srivistava
PURPOSE: To report a case of herpes zoster keratitis in a patient undergoing treatment for herpetic acute retinal necrosis. METHODS: Case report. RESULTS: A 71 year old male presented with acute retinal necrosis of the left eye due to herpes zoster and was treated with intravitreal foscarnet and oral valcyclovir. He developed a retinal detachment and underwent surgical repair. After four weeks, he developed an ipsilateral herpetic zoster keratitis demonstrated by Rose-Bengal staining that was responsive to topical ganciclovir gel...
April 22, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28426277/topical-ganciclovir-in-cytomegalovirus-anterior-uveitis
#20
Joelle Antoun, François Willermain, Dorine Makhoul, Elie Motulsky, Laure Caspers, Lia Judice Relvas
PURPOSE: To study the effects of topical ganciclovir 0.15% gel on cytomegalovirus (CMV) anterior uveitis in a tertiary uveitis referral center in Brussels, Belgium. METHODS: A retrospective study of patients with a clinical diagnosis of CMV anterior uveitis/endotheliitis demonstrated by a positive polymerase chain reaction and/or Goldmann-Witmer coefficient (GWc). RESULTS: We report a series of 15 patients presenting clinical characteristics of CMV anterior uveitis...
May 2017: Journal of Ocular Pharmacology and Therapeutics
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