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https://www.readbyqxmd.com/read/29342127/enhancement-in-corneal-permeability-of-dissolved-carteolol-by-its-combination-with-magnesium-hydroxide-nanoparticles
#1
Noriaki Nagai, Sakie Yamaoka, Yuya Fukuoka, Miyu Ishii, Hiroko Otake, Kazutaka Kanai, Norio Okamoto, Yoshikazu Shimomura
We prepared magnesium hydroxide (MH) nanoparticles, and investigated their effect when combined with dissolved carteolol on the bioavailability and intraocular pressure (IOP)-reducing effect of carteolol. The carteolol was solved in saline containing additives (0.5% methylcellulose, 0.001% benzalkonium chloride, 0.5% mannitol; CRT-solution). MH nanoparticles were prepared by a bead mill method with additives. Then carteolol/MH microparticle and carteolol/MH nanoparticle fixed combinations (mCMFC and nCMFC) were prepared by mixing the CRT-solution and MH particles...
January 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29341922/sustained-release-timolol-maleate-loaded-ocusert-based-on-biopolymer-composite
#2
Revathy V Nair, Shefrin S, Akhil Suresh, Anoop K R, Sreeja C Nair
In the present investigation, the effect of timolol maleate loaded ocuserts was studied as an alternative for conventional anti-glaucoma formulation. Ocuserts were prepared using natural polymer sodium alginate and ethyl cellulose. Physico-chemical properties along with drug entrapment efficiency (94-98%), content uniformity (93.1% ± 0.264-98.00% ± 0.321), in vitro drug release (83.42% ± 0.35 at end of 12 hours), ex vivo permeation all showed satisfactory results, which was found to follow zero order kinetics...
January 13, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29341837/ocular-permeation-of-topical-tazocin-and-its-effectiveness-in-the-treatment-of-pseudomonas-aeruginosa-induced-keratitis-in-rabbits
#3
Sujaya Singh, Renu Agarwal, Zulhilmi Abdul Razak, Robin Ngu, Lwin L Nyein, Sushil Vasudevan, Marina Kapitonova, Azida Juana Kadir, Subrayan Visvaraja
PURPOSE: Pseudomonas aeruginosa is the most common causative organism for contact lens-associated corneal ulcer and is commonly treated with fluoroquinolones. With the emergence of resistant strains, it is important to investigate alternative therapies. Despite well-established efficacy of tazocin against systemic Pseudomonas infections, its topical use for the treatment of Pseudomonas keratitis has not been described, hence this study was aimed to find the ocular permeation of Tazocin and its efficacy in treating keratitis in rabbit eyes...
January 17, 2018: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29341426/biomechanical-histological-and-computed-x-ray-tomographic-analyses-of-hydroxyapatite-coated-peek-implants-in-an-extended-healing-model-in-rabbit
#4
Pär Johansson, Sargon Barkarmo, Mohammed Hawthan, Niccolò Peruzzi, Per Kjellin, Ann Wennerberg
No abstract text is available yet for this article.
January 17, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29339226/model-and-methods-to-assess-hepatic-function-from-indocyanine-green-fluorescence-dynamical-measurements-of-liver-tissue
#5
Chloe Audebert, Irene E Vignon-Clementel
The indocyanine green (ICG) clearance, presented as plasma disappearance rate is, presently, a reliable method to estimate the hepatic "function". However, this technique is not instantaneously available and thus cannot been used intra-operatively (during liver surgery). Near-infrared spectroscopy enables to assess hepatic ICG concentration over time in the liver tissue. This article proposes to extract more information from the liver intensity dynamics by interpreting it through a dedicated pharmacokinetics model...
January 12, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29339089/concentration-gradient-of-noradrenaline-from-the-periphery-to-the-centre-of-the-cornea-a-clue-to-its-origin
#6
Luis Figueira, Carla Ferreira, Catarina Janeiro, Paula Serrao, Fernando Falcao-Reis, Daniel Moura
We set out to demonstrate that the major source of corneal catecholamines is its neuronal release from intrinsic sympathetic nerves rather than circulating or non-neuronal local production. Three concentric segments (central, intermediate, peripheral) were obtained by double trephination (9.5-7.25 mm) performed on corneas harvested from 3-4 month old rabbits and human corneas rejected for transplantation, along with aqueous humour, full iris tissue and blood samples. Endogenous catecholamines were quantified by high pressure liquid chromatography with electrochemical detection (HPLC-ED), and comparison with the uptake of radio-labelled noradrenaline (3H-NA) before and after incubation with cocaine was performed...
January 12, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29339069/multiple-homologous-genes-knockout-ko-by-crispr-cas9-system-in-rabbit
#7
Huan Liu, Tingting Sui, Di Liu, Tingjun Liu, Mao Chen, Jichao Deng, Yuanyuan Xu, Zhanjun Li
The CRISPR/Cas9 system is a highly efficient and convenient genome editing tool, which has been widely used for single or multiple gene mutation in a variety of organisms. Disruption of multiple homologous genes, which have similar DNA sequences and gene function, is required for the study of the desired phenotype. In this study, to test whether the CRISPR/Cas9 system works on the mutation of multiple homologous genes, a single guide RNA (sgRNA) targeting three fucosyltransferases encoding genes (FUT1, FUT2 and SEC1) was designed...
January 12, 2018: Gene
https://www.readbyqxmd.com/read/29338879/identifying-lost-surgical-needles-with-visible-and-near-infrared-fluorescent-light-emitting-microscale-coating
#8
Erin P Ward, Jian Yang, Jonathan C Delong, Tsai-Wen Sung, James Wang, Chris Barback, Natalie Mendez, Santiago Horgan, William Trogler, Andrew C Kummel, Sarah L Blair
BACKGROUND: Retained foreign bodies (RFOs) have substantial clinical and financial consequences. In laparoscopic surgery, RFOs can be a cause of needing to convert a minimally invasive surgery (MIS) procedure to an open operation. A coating for surgical models was developed to augment localization of needles using fluorescence appropriate for open and minimally invasive surgeries procedures. METHODS: An epoxy matrix containing both dansyl chloride and indocyanine green was coated as visible and near infrared labels, respectively...
January 12, 2018: Surgery
https://www.readbyqxmd.com/read/29338745/study-of-correlation-between-wall-shear-stress-and-elasticity-in-atherosclerotic-carotid-arteries
#9
Bo Zhang, Junyi Gu, Ming Qian, Lili Niu, Dhanjoo Ghista
OBJECTIVE: This paper presents the use of the texture matching method to measure the rabbit carotid artery elasticity value of the experimental group and control group respectively. It compares the experimental rabbits, when they are prompted by pathological histology to be at the period of carotid atherosclerosis fatty streaks and fiber plaques, with the control group. METHODS: We have used ultrasound linear array probe for scanning the rabbit carotid arteries...
January 16, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29338152/generation-and-characterization-of-siglec-f-specific-monoclonal-antibodies
#10
Sima Shahmohammadi-Farid, Roya Ghods, Mahmood Jeddi-Tehrani, Ali-Ahmad Bayat, Nazanin Mojtabavi, Alireza Razavi, Amir-Hassan Zarnani
Siglec-F (SF) is a surface glycoprotein expressed by mouse eosinophils and induces caspase- and mitochondria-dependent apoptosis after engagement with its cognate ligand or specific antibodies. This targeting eosinophils by monoclonal antibodies may help diverse diseases associated with increased frequency of eosinophils including allergy and asthma. In this paper, production of murine and rat monoclonal antibodies (mAbs) against Siglec-F has been addressed. Balb/c mice were immunized with siglec-F1 (SF1) and siglec-F2 (SF2) synthetic peptides conjugated to a carrier protein...
December 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29338061/feasibility-of-cell-based-therapy-combined-with-descemetorhexis-for-treating-fuchs-endothelial-corneal-dystrophy-in-rabbit-model
#11
Naoki Okumura, Daiki Matsumoto, Yuya Fukui, Masataka Teramoto, Hirofumi Imai, Tetta Kurosawa, Tomoki Shimada, Friedrich Kruse, Ursula Schlötzer-Schrehardt, Shigeru Kinoshita, Noriko Koizumi
Corneal transparency is maintained by the corneal endothelium through its pump and barrier function. Severe corneal endothelial damage results in dysregulation of water flow and eventually causes corneal haziness and deterioration of visual function. In 2013, we initiated clinical research of cell-based therapy for treating corneal decompensation. In that study, we removed an 8-mm diameter section of damaged corneal endothelium without removing Descemet's membrane (the basement membrane of the corneal endothelium) and then injected cultured human corneal endothelial cells (CECs) into the anterior chamber...
2018: PloS One
https://www.readbyqxmd.com/read/29336364/mechanism-of-chronic-stress-induced-reduced-atherosclerotic-medial-area-and-increased-plaque-instability-in-rabbit-models-of-chronic-stress
#12
Ze-Mou Yu, Xiao-Tao Deng, Ruo-Mei Qi, Lu-Yan Xiao, Chong-Qing Yang, Tao Gong
BACKGROUND: Chronic stress contributes to increased risks of atherosclerotic diseases including heart disease, stroke, and transient ischemic attack. However, its underline mechanisms are poorly understood. This study aimed to elucidate the mechanism via which chronic stress exerts its effect on atherosclerosis (AS). METHODS: Fifty male New Zealand white rabbits were used. Aortic balloon-injury model was applied. Both social stress and physical stress methods were adopted to establish chronic stress models...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29335865/beneficial-effect-of-berberis-amurensis-rupr-on-penile-erection
#13
Rui Tan, Yun Jung Lee, Kyung Woo Cho, Dae Gill Kang, Ho Sub Lee
OBJECTIVE: To investigate whether the methanol extract of Berberis amurensis Rupr. (BAR) augments penile erection using in vitro and in vivo experiments. METHODS: The ex vivo study used corpus cavernosum strips prepared from adult male New Zealand White rabbits. In in vivo studies for intracavernous pressure (ICP), blood pressure, mean arterial pressure (MAP), and increase of peak ICP were continuously monitored during electrical stimulation of Sprague-Dawley rats...
January 15, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29335649/hyaluronic-acid-based-nano-sized-drug-carrier-containing-gellan-gum-microspheres-as-potential-multifunctional-embolic-agent
#14
Ming Fang Hsu, Yen Sheng Tyan, Yu Chen Chien, Ming Wei Lee
The purpose of this study was to develop a gellan gum-based multifunctional embolic agent. Calibrated spherical gellan gum and nanoparticle-containing gellan gum microspheres were prepared via water-in oil emulsification method. Self-assembled nanoparticles composed of short-chain hyaluronic acid and polyethylenimine as the doxorubicin carrier were prepared. The short-chain hyaluronic acid/polyethylenimine/ doxorubicin (sHH/PH/Dox) with the mean size was 140 ± 8 nm. To examine sHH/PH/Dox nanoparticle uptake into cells, the results confirmed that sHH/PH nanoparticles as drug carrier can facilitate the transport of doxorubicin into HepG2 liver cancer cells...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29335388/association-between-clinical-stage-of-oral-cancer-and-expression-of-immunohistochemical-markers
#15
Wojciech Świątkowski, Mansur Rahnama, Tomasz Tomaszewski, Mariola Bigas, Agnieszka Świątkowska, Michał Łobacz, Jan Wallner
AIM: The aim of this study is to demonstrate the possible correlation between the expression of examined protein markers - p53, EGFR, PCNA, p44/42 in the mass of the tumor and the clinical stage of disease. MATERIAL: 48 patients of the Department and Clinic of Oral and Maxillofacial Surgery, Lublin diagnosed with oral cancer. The control group consisted of 10 patients diagnosed with leukoplakia lesions in the oral cavity. The methods: Immunohistochemical analysis using the detection system DAKO K5007 Cat - Dako REAL ™ Detection System, Peroxidase DAB +, Rabbit / Mouse...
December 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/29335002/leishmania-mortality-in-sand-fly-blood-meal-is-not-species-specific-and-does-not-result-from-direct-effect-of-proteinases
#16
Katerina Pruzinova, Jovana Sadlova, Jitka Myskova, Tereza Lestinova, Jozef Janda, Petr Volf
BACKGROUND: Leishmania development in sand flies is confined to the alimentary tract and is closely connected with blood meal digestion. Previously, it has been published that activities of sand fly midgut proteases are harmful to Leishmania, especially to amastigote-promastigote transition forms. However, our experiments with various Leishmania-sand fly pairs gave quite opposite results. METHODS: We evaluated the effect of semi-digested midgut content on different life stages of Leishmania donovani and Leishmania major in vitro...
January 15, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29334646/17%C3%AE-estradiol-improves-the-efficacy-of-exploited-autologous-bone-marrow-derived-mesenchymal-stem-cells-in-non-union-radial-defect-healing-a-rabbit-model
#17
Delaram Zamani Mazdeh, Pezhman Mirshokraei, Mohammadreza Emami, Ali Mirshahi, Iraj Karimi
Exploiting mesenchymal stem cells (MSCs) appears to be an appealing alternative to the traditional clinical approach in the treatment of non-union bone defects. It has been shown that 17β-estradiol improves the osteogenesis and proliferation potential of the MSCs via estrogen receptors. We investigated the effect of 17β-estradiol on exploiting autologous BMSCs (bone marrow-derived MSCs) for the purpose of healing of radial non-union segmental defect in rabbit. Twenty rabbits were divided into 4 experimental groups: 1...
December 28, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29334511/evaluation-of-recombinant-factor-viia-tranexamic-acid-and-desmopressin-to-reduce-prasugrel-related-bleeding-a-randomised-placebo-controlled-study-in-a-rabbit-model
#18
Fanny Bonhomme, Thomas Lecompte, Charles M Samama, Anne Godier, Pierre Fontana
BACKGROUND: Prasugrel is a thienopyridine that inhibits platelet aggregation more rapidly and effectively than clopidogrel, with an increased bleeding risk. OBJECTIVE: The current study aimed to evaluate the efficacy of three nonspecific haemostatic drugs - recombinant activated factor VII (rFVIIa), tranexamic acid and desmopressin (DDAVP) - to limit blood loss after administration of prasugrel in a rabbit model of bleeding while also evaluating any prothrombotic effects...
January 13, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29334430/preclinical-therapeutic-efficacy-of-the-ciprofloxacin-eluting-sinus-stent-for-pseudomonas-aeruginosa-sinusitis
#19
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/29334299/mucoadhesive-buccal-film-containing-ornidazole-and-dexamethasone-for-oral-ulcers-in-vitro-and-in-vivo-studies
#20
Chengliang Zhang, Yanan Liu, Wei Li, Ping Gao, Dong Xiang, Xiuhua Ren, Dong Liu
A bilayered mucoadhesive buccal film containing a combination of ornidazole (OD) and dexamethasone sodium phosphate (DEX) was prepared using solvent casting to treat oral ulcers. Films were systematically evaluated in vitro to obtain the optimum formulation. The therapeutic effects of these films were investigated in the rabbit oral ulcer model and the in vivo release of OD and DEX in the human oral cavity was also evaluated. The backing layer contained ethyl cellulose and an optimal mucoadhesive layer containing both OD and DEX was produced...
January 15, 2018: Pharmaceutical Development and Technology
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