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https://www.readbyqxmd.com/read/28634758/a-general-double-library-selex-strategy-for-aptamer-selection-using-unmodified-nonimmobilized-targets
#1
Kyung Hyun Lee, Huaqiang Zeng
Aptamer discovery for unmodified nonimmobilized targets has been constantly presenting itself as a significant challenge to the research community. We demonstrate here a novel double library (DL) SELEX strategy and its usefulness and generality toward discovering both ssDNA- and RNA-based aptamers with nanomolar binding affinities toward unmodified targets of both small (e.g., doxycycline) and large (e.g., VEGF165) sizes. The same selection strategy further allows for concurrent selection of an aptamer pair, recognizing discrete epitopes on the same protein, from the same selection cycles for the sandwich aptamer pair-based biosensor development (e...
June 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28632134/targeting-hypoxic-cancer-stem-cells-cscs-with-doxycycline-implications-for-optimizing-anti-angiogenic-therapy
#2
Ernestina Marianna De Francesco, Marcello Maggiolini, Herbert B Tanowitz, Federica Sotgia, Michael P Lisanti
Here, we report new mechanistic insight into how chronic hypoxia increases 'stemness' in cancer cells. Using chemical inhibitors, we provide direct experimental evidence that ROS production and mitochondrial biogenesis are both required for the hypoxia-induced propagation of CSCs. More specifically, we show that hypoxic CSCs can be effectively targeted with i) simple mitochondrial anti-oxidants (Mito-TEMPO) and/or ii) inhibitors of mitochondrial biogenesis (Doxycycline). In this context, we discuss the idea that mitochondrial biogenesis itself may be a primary driver of "stemness" in hypoxic cancer cells, with metabolic links to fatty acid oxidation (FAO)...
June 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28631649/chlamydia-trachomatis-proctitis-masquerading-as-carcinoma-rectum-first-case-report-from-india
#3
Benu Dhawan, Govind Kumar Makharia, Deepak Juyal, Sujeesh Sebastian, Riti Bhatia, Neena Khanna
While proctitis is caused both by infectious and noninfectious causes, infectious causes are acquired typically sexually. Chlamydia trachomatis, which is the most frequent bacterial pathogen causing sexually transmitted infections worldwide, is one of the causative agents of proctitis. We report a case history of a bisexual male who presented to us with rectal bleeding. The colonoscopy showed a nodular ulcerated lesion in the rectum suggestive of rectal malignancy, but biopsies from rectal mass did not reveal malignancy...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28628632/increasing-procaspase-8-expression-using-repurposed-drugs-to-induce-hiv-infected-cell-death-in-ex-vivo-patient-cells
#4
Rahul Sampath, Nathan W Cummins, Sekar Natesampillai, Gary D Bren, Thomas D Chung, Jason Baker, Keith Henry, Amélie Pagliuzza, Andrew D Badley
HIV persists because a reservoir of latently infected CD4 T cells do not express viral proteins and are indistinguishable from uninfected cells. One approach to HIV cure suggests that reactivating HIV will activate cytotoxic pathways; yet when tested in vivo, reactivating cells do not die sufficiently to reduce cell-associated HIV DNA levels. We recently showed that following reactivation from latency, HIV infected cells generate the HIV specific cytotoxic protein Casp8p41 which is produced by HIV protease cleaving procaspase 8...
2017: PloS One
https://www.readbyqxmd.com/read/28624900/the-cre-inducer-doxycycline-lowers-cytokine-and-chemokine-transcript-levels-in-the-gut-of-mice
#5
Axel Kornerup Hansen, Sara Astrup Malm, Stine B Metzdorff
The antibiotic doxycycline is used as an inducer of recombinase (cre)-based conditional gene knockout in mice, which is a common tool to show the effect of disrupted gene functions only in one period of a research animal's life. However, other types of such antibiotics have been shown to have a strong impact on the immune system. Here we show that in C57BL/6 mice, the most commonly applied strain for genetic modification, doxycycline treatment lowered transcription of the genes Il1b, Il10, Il18, Tnf, Cxcl1, and Cxcl2 in the ileum, and of the gene Il18 in colon...
June 18, 2017: Journal of Applied Genetics
https://www.readbyqxmd.com/read/28622697/vitamin-c-and-doxycycline-a-synthetic-lethal-combination-therapy-targeting-metabolic-flexibility-in-cancer-stem-cells-cscs
#6
Ernestina Marianna De Francesco, Gloria Bonuccelli, Marcello Maggiolini, Federica Sotgia, Michael P Lisanti
Here, we developed a new synthetic lethal strategy for further optimizing the eradication of cancer stem cells (CSCs). Briefly, we show that chronic treatment with the FDA-approved antibiotic Doxycycline effectively reduces cellular respiration, by targeting mitochondrial protein translation. The expression of four mitochondrial DNA encoded proteins (MT-ND3, MT-CO2, MT-ATP6 and MT-ATP8) is suppressed, by up to 35-fold. This high selection pressure metabolically synchronizes the surviving cancer cell sub-population towards a predominantly glycolytic phenotype, resulting in metabolic inflexibility...
June 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28622620/simultaneous-uhplc-uv-analysis-of-hydroxychloroquine-minocycline-and-doxycycline-from-serum-samples-for-the-therapeutic-drug-monitoring-of-q-fever-and-whipple-s-disease
#7
Nicholas Armstrong, Magali Richez, Didier Raoult, Eric Chabriere
A fast UHPLC-UV method was developed for the simultaneous analysis of Hydroxychloroquine, Minocycline and Doxycycline drugs from 100μL of human serum samples. Serum samples were extracted by liquid-liquid extraction and injected into a phenyl hexyl reverse phase column. Compounds were separated using a mobile phase linear gradient and monitored by UV detection at 343nm. Chloroquine and Oxytetracycline were used as internal standards. Lower and upper limits of quantifications, as well as the other levels of calibration, were validated with acceptable accuracy (<15% deviation) and precision (<15% coefficient of variation) according to the European Medicines Agency guidelines...
June 9, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28621909/systemic-therapy-of-ocular-and-cutaneous-rosacea-in-children
#8
L I Gonser, C E Gonser, C Deuter, M Heister, M Zierhut, M Schaller
BACKGROUND: In paediatric rosacea, ocular symptoms are often predominant. Literature about systemic therapy of paediatric ocular rosacea is sparse, though. OBJECTIVE: Analysis of children with ocular rosacea treated systemically, particularly addressing remission and recurrence rates. METHODS: Retrospective study reviewing the medical records of children with ocular rosacea treated with systemic antibiotic therapy. Nine out of 19 patients were chosen for detailed analysis...
June 16, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28620262/prevalence-of-multiple-drug-resistant-streptococcus-suis-in-and-around-guwahati-india
#9
Mrinalee Devi, Jyoti B Dutta, Swaraj Rajkhowa, Dhireswar Kalita, Girindra Kumar Saikia, Bipin Chandra Das, Razibuddin Ahmed Hazarika, Gauranga Mahato
AIM: This study was conducted to determine the prevalence and antimicrobial susceptibility of Streptococcus suis and their resistance patterns isolated from both clinically healthy carriers and diseased pigs in and around Guwahati, Assam, India. MATERIALS AND METHODS: A total of 497 samples were collected during October, 2012, to April, 2014, from clinically healthy (n=67) and diseased (n=230) pigs of varying age and either sex maintained under organized and unorganized farming systems...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28619591/doxycycline-as-a-new-chiral-selector-in-capillary-electrophoresis
#10
Min Gyeong Jang, Myung Duk Jang, Jung Hag Park
Doxycycline (DOX) is one of the tetracycline class of antibiotics and has not been examined for its enantioseparation abilities previously. The purpose of the present work was to evaluate DOX as a chiral selector (CS) using capillary electrophoresis (CE) in nonaqueous mode. Systematic experiments were performed to investigate the effects of concentration of CS, compositions of organic solvents and background electrolytes, applied voltage on chiral separation of a set of acidic chiral compounds. Excellent resolutions of enantiomers of acidic chiral compounds were attained in a background electrolytes composed of 50:50 acetonitrile/methanol+214mM acetic acid+ 63mM triethylamine and 38mM DOX...
June 9, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28619504/kolaviron-shows-anti-proliferative-effect-and-down-regulation-of-vascular-endothelial-growth-factor-c-and-toll-like-receptor-2-in-wuchereria-bancrofti-infected-blood-lymphocytes
#11
Aliyu Muhammad, Audu Funmilola, Idowu A Aimola, Iliya S Ndams, Mairo H Inuwa, Andrew J Nok
The anti-proliferative effect and down regulation of vascular endothelial growth factor C and toll like receptor-2 by kolaviron on Wuchereria bancrofti infected peripheral blood lymphocytes were investigated. Blood were collected from consenting volunteers in Talata Mafara, Nigeria, between the hours of 10pm to 12am, and microscopically identified for microfilariae. W. bancrofti positive samples were cultured for 72h treated with Doxycycline (2μg/ml) and kolaviron (5μg/ml) in vitro. Mitotic index, expression of vascular endothelial growth factor-C (VEGF-c), toll like receptor-2 (TLR-2) were determined using standard procedures...
June 12, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28618841/assessment-of-solid-microneedle-rollers-to-enhance-transmembrane-delivery-of-doxycycline-and-inhibition-of-mmp-activity
#12
Abbie Omolu, Maryse Bailly, Richard M Day
Many chronic wounds exhibit high matrix metalloproteinase (MMP) activity that impedes the normal wound healing process. Intradermal delivery (IDD) of sub-antimicrobial concentrations of doxycycline, as an MMP inhibitor, could target early stages of chronic wound development and inhibit further wound progression. To deliver doxycycline intradermally, the skin barrier must be disrupted. Microneedle rollers offer a minimally invasive technique to penetrate the skin by creating multiple microchannels that act as temporary conduits for drugs to diffuse through...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28615866/virulence-assay-and-role-of-bacillus-thuringiensis-ts110-as-biocontrol-agent-against-the-larval-stages-of-rice-leaffolder-cnaphalocrocis-medinalis
#13
Tuhin Subhra Ghosh, Soumendranath Chatterjee, Syed Afrin Azmi, Abhijit Mazumdar, Tushar Kanti Dangar
The bacterial isolate Bacillus thuringiensis TS110 was isolated from the rice field soil of Burdwan district, West Bengal, India. Bioassay test of the bacteria TS110 against 3rd, 4th and 5th instar larvae of Cnaphalocrocis medinalis was carried out. Cut leaf assay, potted plant assay and field assay were done. During filed assay, it has been observed that the LC50 (×10(7)) values of TS110 against 3rd, 4th and 5th instar larvae of C. medinalis were 3.77, 5.29, 4.83 and 4.93, 4.42, 4.72 in dry and wet season, respectively...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28615848/therapeutic-management-of-canine-ehrlichiosis-with-aid-of-blood-transfusion-a-case-report
#14
Arjun Kasondra, Snehil Gupta, Gamit Amit Bhai Bharat Bhai, Vijesh Kumar Saini
An adult female Labrador Retriever dog was presented at referral veterinary polyclinic, IVRI in lateral recumbency with history of anorexia, high fever, severe panting, heavy tick infestation, and not responding to cephalosporins and fluoroquinolones since last 1 week. Clinical examination showed pale conjunctiva, enlarged popliteal lymph node however, electrocardiogram (ECG) report found to be normal. Haematological finding showed marked anaemia and thrombocytopenia. Parasitological examination found it to be positive for Ehrlichia canis and confirmed ticks to be Rhipicephalus sanguineus...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28615693/the-ccr4-not-complex-contributes-to-repression-of-major-histocompatibility-complex-class-ii-transcription
#15
Alfonso Rodríguez-Gil, Olesja Ritter, Vera V Saul, Jochen Wilhelm, Chen-Yuan Yang, Rudolf Grosschedl, Yumiko Imai, Keiji Kuba, Michael Kracht, M Lienhard Schmitz
The multi-subunit CCR4 (carbon catabolite repressor 4)-NOT (Negative on TATA) complex serves as a central coordinator of all different steps of eukaryotic gene expression. Here we performed a systematic and comparative analysis of cells where the CCR4-NOT subunits CNOT1, CNOT2 or CNOT3 were individually downregulated using doxycycline-inducible shRNAs. Microarray experiments showed that downregulation of either CNOT subunit resulted in elevated expression of major histocompatibility complex class II (MHC II) genes which are found in a gene cluster on chromosome 6...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28614137/swept-source-optical-coherence-tomography-angiography-in-rickettsial-retinitis
#16
Rim Kahloun, Bechir Jelliti, Imen Ksiaa, Hager Ben Amor, Sonia Zaouali, Marco Lupidi, Salim Ben Yahia, Moncef Khairallah
PURPOSE: To report optical coherence tomography angiography findings in a patient with rickettsial retinitis. METHODS: A 29-year-old man complaining of acute blurring vision in the right eye associated with Rickettsia conorii infection underwent a comprehensive ocular examination, fluorescein angiography, spectral-domain optical coherence tomography, and swept-source optical coherence tomography angiography. RESULTS: Funduscopy showed two large areas of retinitis in the inferior macula along the distribution of the inferotemporal artery with associated retinal hemorrhages, retinal edema, and serous retinal detachment...
June 13, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28610919/neural-differentiation-of-human-embryonic-stem-cells-induced-by-the-transgene-mediated-overexpression-of-single-transcription-factors
#17
Misako Matsushita, Yuhki Nakatake, Itaru Arai, Keiji Ibata, Kazuhisa Kohda, Sravan K Goparaju, Miyako Murakami, Miki Sakota, Nana Chikazawa-Nohtomi, Shigeru B H Ko, Takanori Kanai, Michisuke Yuzaki, Minoru S H Ko
Pluripotent human embryonic stem cells (hESCs) can differentiate into multiple cell lineages, thus, providing one of the best platforms to study molecular mechanisms during cell differentiation. Recently, we have reported rapid and efficient differentiation of hESCs into functional neurons by introducing a cocktail of synthetic mRNAs encoding five transcription factors (TFs): NEUROG1, NEUROG2, NEUROG3, NEUROD1, and NEUROD2. Here we further tested a possibility that even single transcription factors, when expressed ectopically, can differentiate hESCs into neurons...
June 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28608596/live-birth-rate-following-oral-antibiotic-treatment-for-chronic-endometritis-in-infertile-women-with-repeated-implantation-failure
#18
Kotaro Kitaya, Hidehiko Matsubayashi, Yukiko Takaya, Rie Nishiyama, Kohei Yamaguchi, Takumi Takeuchi, Tomomoto Ishikawa
PROBLEM: The aim of this prospective study was to investigate the prevalence of chronic endometritis (CE) in infertile women with a history of repeated implantation failure (RIF) and to determine whether oral antibiotic treatment improves their live birth rate in the following embryo transfer (ET) cycles. METHOD OF STUDY: Endometrial biopsy samples obtained from infertile women with RIF were subjected to immunohistochemistrical/histopathologic diagnosis of CE. Following antibiotic administration to the RIF/CE group, their histopathologic cure rate, microbial detection rate, and reproductive outcome in the subsequent ET cycles were prospectively studied...
June 13, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28607026/efficacy-of-a-paromomycin-plus-chloroquine-combination-therapy-in-experimental-cutaneous-leishmaniasis
#19
Gert-Jan Wijnant, Katrien Van Bocxlaer, Vanessa Yardley, Sudaxshina Murdan, Simon Croft
The 4-aminoquinoline chloroquine (CQ) is clinically used in combination with doxycycline to cure chronic Q-fever, as it enhances the activity of the antibiotic against the causative Coxiella burnetii bacteria residing within macrophage phagolysosomes. As there is a similar cellular host-pathogen biology for Leishmania parasites, this study aimed to determine whether such an approach could be also the basis for a new, improved treatment for cutaneous leishmaniasis (CL). We have evaluated the in vitro and in vivo activity of combinations of CQ with standard drugs paromomycin (PM), miltefosine and amphotericin B against Leishmania major and Leishmania mexicana In 72-hour intracellular anti-leishmanial assays, outcomes were variable for different drugs...
June 12, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28605957/antimicrobial-susceptibility-of-riemerella-anatipestifer-strains-isolated-from-geese-and-ducks-in-hungary
#20
Éva Gyuris, Enikő Wehmann, Katalin Czeibert, Tibor Magyar
Riemerella anatipestifer causes anatipestifer disease in many avian species. A total of 185 R. anatipestifer strains isolated in Hungary between 2000 and 2014 from geese and ducks were tested against 13 antibiotics (ampicillin, doxycycline, enrofloxacin, erythromycin, florfenicol, flumequine, gentamicin, penicillin, spectinomycin, streptomycin, sulphamethoxazole-trimethoprim, sulphonamide compounds, and tetracycline) by the Kirby-Bauer disk diffusion method. The majority of the strains were susceptible to florfenicol (97...
June 2017: Acta Veterinaria Hungarica
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