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https://www.readbyqxmd.com/read/29334430/preclinical-therapeutic-efficacy-of-the-ciprofloxacin-eluting-sinus-stent-for-pseudomonas-aeruginosa-sinusitis
#1
Do-Yeon Cho, Dong-Jin Lim, Calvin Mackey, Daniel Skinner, Christopher Weeks, Gobind S Gill, Robert W Hergenrother, William E Swords, Bradford A Woodworth
BACKGROUND: The ciprofloxacin-coated sinus stent (CSS) has unique therapeutic potential to deliver antibiotics to the sinuses. The objective of this study is to evaluate the efficacy of the CSS stent in eliminating Pseudomonas aeruginosa infection in a rabbit model of sinusitis. METHODS: A ciprofloxacin-eluting sinus stent was created by coating ciprofloxacin/Eudragit RS100 on biodegradable poly-D/L-lactic acid (2 mg). After analyzing in-vitro inhibition of P aeruginosa (PAO-1 strain) biofilm formation, a total of 8 stents (4 shams, 4 CSSs) were placed unilaterally in rabbit maxillary sinuses via dorsal sinusotomy after inducing infection for 1 week with PAO-1...
January 15, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29334121/the-multipotency-to-commitment-transition-mct-in-c-elegans-implications-for-reprogramming-from-cells-to-organs
#2
REVIEW
Erik A Spickard, Pradeep M Joshi, Joel H Rothman
In animal embryos, cells transition from a multipotential state, with the capacity to adopt multiple fates, into an irreversible, committed state of differentiation. This multipotency-to-commitment transition (MCT) is evident from experiments in which cell fate is reprogrammed by transcription factors for cell-type-specific differentiation, as has been observed extensively in C. elegans. Although factors that direct differentiation into each of the three germ layer types cannot generally reprogram cells after the MCT in this animal, transcription factors for endoderm development are able to do so in multiple differentiated cell types...
January 15, 2018: FEBS Letters
https://www.readbyqxmd.com/read/29333613/pharmacokinetics-pharmacodynamics-and-clinical-use-of-trazodone-and-its-active-metabolite-m-chlorophenylpiperazine-in-the-horse
#3
J L Davis, J Schirmer, E Medlin
Trazodone is a serotonin receptor antagonist and reuptake inhibitor used extensively as an anxiolytic in human and small animal veterinary medicine. The aims of this study were to determine the pharmacokinetics of oral trazodone in experimental horses and to evaluate the effect of oral trazodone in clinical horses. Six experimental horses were administered trazodone at 7.5 or 10 mg/kg. Plasma concentrations of trazodone and its metabolite (m-CPP) were determined via UPLC-MS/MS. Noncompartmental pharmacokinetic analysis, sedation and ataxia scores were determined...
January 14, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29331677/identification-of-potential-mr-derived-biomarkers-for-tumor-tissue-response-to-177lu-octreotate-therapy-in-an-animal-model-of-small-intestine-neuroendocrine-tumor
#4
Mikael Montelius, Johan Spetz, Oscar Jalnefjord, Evelin Berger, Ola Nilsson, Maria Ljungberg, Eva Forssell-Aronsson
Magnetic resonance (MR) methods enable noninvasive, regional tumor therapy response assessment, but associations between MR parameters, underlying biology, and therapeutic effects must be investigated. The aim of this study was to investigate response assessment efficacy and biological associations of MR parameters in a neuroendocrine tumor (NET) model subjected to radionuclide treatment. Twenty-one mice with NETs received 177Lu-octreotate at day 0. MR experiments (day -1, 1, 3, 8, and 13) included T2-weighted, dynamic contrast-enhanced (DCE) and diffusion-weighted imaging (DWI) and relaxation measurements (T1/T2*)...
January 10, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29330801/hypoxic-treatment-of-zebrafish-embryos-and-larvae
#5
Hiroyasu Kamei, Cunming Duan
Zebrafish has emerged as an informative animal model to study the biological impact and molecular mechanisms of hypoxia. Here we describe a simple method to induce hypoxia in zebrafish embryos and larvae. This protocol is easy and reproducible and does not require expensive equipment or specialized devices. It can be adapted in large, medium, and small scales. This protocol is also well-suited for experiments requiring chemical drug treatment and can be applied to other fish and amphibian species.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330688/hepatocyte-nuclear-factors-as-possible-c-reactive-protein-transcriptional-inducer-in-the-liver-and-white-adipose-tissue-of-rats-with-experimental-chronic-renal-failure
#6
Elzbieta Sucajtys-Szulc, Alicja Debska-Slizien, Boleslaw Rutkowski, Ryszard Milczarek, Iwona Pelikant-Malecka, Tomasz Sledzinski, Julian Swierczynski, Marek Szolkiewicz
Inflammation related to chronic kidney disease (CKD) is an important clinical problem. We recently determined that hepatocyte nuclear factor 1α (HNF1α) was upregulated in the livers of chronic renal failure (CRF) rats-experimental model of CKD. Considering that the promoter region of gene encoding C-reactive protein (CRP) contains binding sites for HNF1α and that the loss-of-function mutation in the Hnfs1α leads to significant reduction in circulating CRP levels, we hypothesized that HNF1α can activate the Crp in CRF rats...
January 12, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29330494/characterizing-the-bacterial-microbiota-in-different-gastrointestinal-tract-segments-of-the-bactrian-camel
#7
Jing He, Li Yi, Le Hai, Liang Ming, Wanting Gao, Rimutu Ji
The bacterial community plays important roles in the gastrointestinal tracts (GITs) of animals. However, our understanding of the microbial communities in the GIT of Bactrian camels remains limited. Here, we describe the bacterial communities from eight different GIT segments (rumen, reticulum, abomasum, duodenum, ileum, jejunum, caecum, colon) and faeces determined from 11 Bactrian camels using 16S rRNA gene amplicon sequencing. Twenty-seven bacterial phyla were found in the GIT, with Firmicutes, Verrucomicrobia and Bacteroidetes predominating...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330092/a-novel-double-antigen-sandwich-elisa-for-the-species-independent-detection-of-crimean-congo-hemorrhagic-fever-virus-specific-antibodies
#8
Miriam A Sas, Loic Comtet, Fabien Donnet, Marc Mertens, Zati Vatansever, Noel Tordo, Philippe Pourquier, Martin H Groschup
Crimean-Congo hemorrhagic fever (CCHF) is a tick-borne disease in humans caused by the CCHF virus (CCHFV). The detection of anti-CCHFV antibodies in animals is used to reveal infection risk areas. Therefore a simple, quick and reliable multispecies assay for the detection of CCHFV-specific antibodies is needed. This work presents the development and validation of a novel CCHF double-antigen ELISA for the detection of anti-CCHFV nucleoprotein antibodies. The test requires 30 μl of serum, and results are obtained within 90 min...
January 9, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29329627/comparative-efficacy-of-curcumin-and-paromomycin-against-cryptosporidium-parvum-infection-in-a-balb-c-model
#9
Mohammad Asadpour, Fatemeh Namazi, Seyed Mostafa Razavi, Saeed Nazifi
Cryptosporidium is a ubiquitous protozoan parasite causing gastrointestinal disorder in various hosts worldwide. The disease is self-limiting in the immunocompetent but life-threatening in immunodeficient individuals. Investigations to find an effective drug for the complete elimination of the Cryptosporidium infection are ongoing and urgently needed. The current study was undertaken to examine the anti-cryptosporidial efficacy of curcumin in experimentally infected mice compared with that of paromomycin. Oocysts were isolated from a pre-weaned dairy calf and identified as Cryptosporidium parvum using a nested- polymerase chain reaction (PCR) on Small subunit ribosomal ribonucleic acid (SSU rRNA) gene and sequencing analysis...
January 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29329621/first-parasitological-histopathological-and-molecular-characterization-of-echinococcus-vogeli-rausch-and-bernstein-1972-from-cuniculus-paca-linnaeus-1766-in-the-cerrado-biome-mato-grosso-do-sul-brazil
#10
Fernanda Bittencourt-Oliveira, Paulo Teixeira, Alba Alencar, Rodrigo Menezes, Christiane Corrêa, Leandro Neves, Fernanda Almeida, Daniel Daipert-Garcia, José Roberto Machado-Silva, Rosângela Rodrigues-Silva
Polycystic echinococcosis (PE) is caused by Echinococcus vogeli metacestodes (larval stage) in Neotropical countries. E. vogeli is trophically-transmitted between predators bush dogs (Speothos venaticus) and prey pacas (Cuniculus paca). In Brazil, reported PE cases are restricted to the Amazon biome. In this study, metacestodes from a paca hunted in Mato Grosso do Sul state (Cerrado biome) were identified morphological and histopathological techniques and further confirmed by molecular testing (sequencing of cytochrome C oxidase subunit I (cox1) gene) for the first time...
January 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29329590/frequent-overexpression-of-amap1-an-arf6-effector-in-cell-invasion-is-characteristic-of-the-mmtv-pymt-rather-than-the-mmtv-neu-human-breast-cancer-model
#11
Yutaro Otsuka, Tsukasa Oikawa, Hinako Yoshino, Shigeru Hashimoto, Haruka Handa, Hiroki Yamamoto, Ari Hashimoto, Hisataka Sabe
BACKGROUND: The small GTPase Arf6 and its downstream effector AMAP1 (also called ASAP1/DDEF1) constitute a signaling pathway promoting cell invasion, in which AMAP1 interacts with several different proteins, including PRKD2, EPB41L5, paxillin, and cortactin. Components of this pathway are often overexpressed in human breast cancer cells, to be correlated with poor prognosis of the patients, whereas overexpression of the Arf6 pathway did not correlate with the four main molecular classes of human breast tumors...
January 5, 2018: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29329501/sustained-plasma-hepcidin-suppression-and-iron-elevation-by-anticalin-derived-hepcidin-antagonist-in-cynomolgus-monkey
#12
Andreas M Hohlbaum, Hendrik Gille, Stefan Trentmann, Maria Kolodziejczyk, Barbara Rattenstetter, Coby M Laarakkers, Galina Katzmann, Hans Jürgen Christian, Nicole Andersen, Andrea Allersdorfer, Shane A Olwill, Bernd Meibohm, Laurent P Audoly, Dorine W Swinkels, Rachel P L van Swelm
BACKGROUND AND PURPOSE: Anaemia of chronic disease (ACD) has been linked to iron restricted erythropoiesis imposed by high circulating levels of hepcidin, a 25 amino acid hepatocyte-derived peptide that controls systemic iron homeostasis. Here we report the engineering of the human lipocalin-derived, small protein-based Anticalin PRS-080 hepcidin antagonist with high affinity and selectivity. EXPERIMENTAL APPROACH: Anticalin- and hepcidin-specific pharmacokinetic/pharmacodynamic modelling was used to design and select the suitable drug candidate based on half life extension and duration of hepcidin suppression...
January 12, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29327671/tissue-engineered-heart-valves-a-call-for-mechanistic-studies
#13
Kevin Blum, Joseph Drews, Christopher K Breuer
Heart valve disease carries a substantial risk of morbidity and mortality. Outcomes are significantly improved by valve replacement, but currently-available mechanical and biological replacement valves are associated with complications of their own. Mechanical valves have a high rate of thromboembolism and require lifelong anticoagulation. Biological prosthetic valves have a much shorter lifespan, and are prone to tearing and degradation. Both types of valves lack the capacity for growth, making them particularly problematic in pediatric patients...
January 12, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29327660/identification-of-2-phenylethanol-with-a-rose-like-odor-from-anal-sac-secretions-of-the-small-indian-mongoose-herpestes-auropunctatus
#14
Tamako Miyazaki, Katsushi Nakata, Takashi Nishimura, Shintaro Abe, Tetsuro Yamashita, Masao Miyazaki
The small Indian mongoose (Herpestes auropunctatus) is an invasive species in Okinawa and Amami-Oshima, Japan. Major strategies for their eradication have been the use of baited traps, which suffer from decreasing efficiency with declining populations and the bycatch of native animals. To address these concerns, mongoose-specific lures are required. In this study, we aimed to identify species- and/or sex-specific compounds from anal sac secretions of small Indian mongooses. Volatile compounds emitted from male and female mongoose anal sac secretions were analyzed by thermal desorption-gas chromatography-mass spectrometry...
January 12, 2018: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29327429/in-vivo-migration-of-endogenous-brain-progenitor-cells-guided-by-an-injectable-peptide-amphiphile-biomaterial
#15
Reza Motalleb, Eric J Berns, Piyush Patel, Julie Gold, Samuel I Stupp, H Georg Kuhn
Biomaterials hold great promise in helping the adult brain regenerate and rebuild after trauma. Peptide amphiphiles (PA) are highly versatile biomaterials, gelling and forming macromolecular structures when exposed to physiological levels of electrolytes. We are here reporting on the first ever in vivo use of self-assembling peptide amphiphile carrying a Tenascin-C signal (E2 Ten-C PA) for the re-direction of endogenous neuroblasts in the rodent brain. The PA forms highly aligned nanofibers, displaying the migratory sequence of Tenascin-C glycoprotein as epitope...
January 12, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29325918/bioactive-fraction-of-rhodiola-algida-against-chronic-hypoxia-induced-pulmonary-arterial-hypertension-and-its-anti-proliferation-mechanism-in-rats
#16
Xingmei Nan, Shanshan Su, Ke Ma, Xiaodong Ma, Ximeng Wang, Dongzhu Zhaxi, Rili Ge, Zhanqiang Li, Dianxiang Lu
BACKGROUND: Rhodiola algida has long been used to prevent acute and chronic altitude sickness. In our previous study, we screened for a bioactive fraction from R. algida. However, the effects and mechanisms of this bioactive fraction on chronic hypoxia-induced pulmonary arterial hypertension remain to be elucidated. OBJECTIVE: The aim of this study was to determine the effect of bioactive fraction from R. algida (ACRT) on chronic hypoxia-induced pulmonary arterial hypertension (HPAH) and to understand the possible mechanism of its pharmacodynamic actions...
January 8, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29325547/paracrine-and-epigenetic-control-of-caf-induced-metastasis-the-role-of-hotair-stimulated-by-tgf-%C3%A3-1-secretion
#17
Yu Ren, Huan-Huan Jia, Yi-Qi Xu, Xuan Zhou, Xiao-Hui Zhao, Yun-Fei Wang, Xin Song, Zhi-Yan Zhu, Ting Sun, Yan Dou, Wei-Ping Tian, Xiu-Lan Zhao, Chun-Sheng Kang, Mei Mei
BACKGROUND: The communication between carcinoma associated fibroblasts (CAFs) and cancer cells facilitate tumor metastasis. In this study, we further underlying the epigenetic mechanisms of CAFs feed the cancer cells and the molecular mediators involved in these processes. METHODS: MCF-7 and MDA-MB-231 cells were treated with CAFs culture conditioned medium, respectively. Cytokine antibody array, enzyme-linked immunosorbent assay, western blotting and immunofluorescence were used to identify the key chemokines...
January 11, 2018: Molecular Cancer
https://www.readbyqxmd.com/read/29325516/brucellosis-remains-a-neglected-disease-in-the-developing-world-a-call-for-interdisciplinary-action
#18
K A Franc, R C Krecek, B N Häsler, A M Arenas-Gamboa
BACKGROUND: Brucellosis is an endemic zoonotic disease in most of the developing world that causes devastating losses to the livestock industry and small-scale livestock holders. Infected animals exhibit clinical signs that are of economic significance to stakeholders and include reduced fertility, abortion, poor weight gain, lost draught power, and a substantial decline in milk production. In humans, brucellosis typically manifests as a variety of non-specific clinical signs. Chronicity and recurring febrile conditions, as well as devastating complications in pregnant women are common sequelae...
January 11, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29325417/rhubarb-supplementation-promotes-intestinal-mucosal-innate-immune-homeostasis-through-modulating-intestinal-epithelial-microbiota-in-goat-kids
#19
Jinzhen Jiao, Jian Wu, Min Wang, Chuanshe Zhou, Rong-Zhen Zhong, Zhi-Liang Tan
The abuse and misuse of antibiotics in livestock production pose a potential health risk globally. Rhubarb can serve as a potential alternative to antibiotics, and several studies have looked into its anti-cancer, anti-tumor and anti-inflammatory properties. The aim of this study was to test the effects of rhubarb supplementation to the diet of young ruminants on innate immune function and epithelial microbiota in the small intestine. Goat kids were fed with a control diet supplemented with or without rhubarb (1...
January 11, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29325071/viral-suppressors-of-rnai-employ-a-rapid-screening-mode-to-discriminate-viral-rna-from-cellular-small-rna
#20
Mohamed Fareh, Jasper van Lopik, Iason Katechis, Alfred W Bronkhorst, Anna C Haagsma, Ronald P van Rij, Chirlmin Joo
RNA interference (RNAi) is an indispensable mechanism for antiviral defense in insects, including mosquitoes that transmit human diseases. To escape this antiviral defense system, viruses encode suppressors of RNAi that prevent elimination of viral RNAs, and thus ensure efficient virus accumulation. Although the first animal Viral Suppressor of RNAi (VSR) was identified more than a decade ago, the molecular basis of RNAi suppression by these viral proteins remains unclear. Here, we developed a single-molecule fluorescence assay to investigate how VSRs inhibit the recognition of viral RNAs by Dcr-2, a key endoribonuclease enzyme in the RNAi pathway...
January 9, 2018: Nucleic Acids Research
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