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https://www.readbyqxmd.com/read/29055244/a-pilot-study-comparing-mechanical-properties-of-tissue-engineered-cartilages-and-various-endogenous-cartilages
#1
Andrew K Pappa, Sajjad Soleimani, Montserrat Caballero, Alexandra E Halevi, John A van Aalst
BACKGROUND: Mechanical properties of tissue-engineered cartilage and a variety of endogenous cartilage were measured. The main goal was to evaluate if the tissue-engineered cartilage have similar mechanical characteristics to be replaced with rib cartilage in microtia reconstruction. Such study lays the foundation for future human clinical trials for microtia reconstruction. METHOD: Atomic force microscopy and compression testing were used to measure the viscoelasticity of tissue-engineered cartilage (stem cell seeded on Poly lactic co-glycolytic acid nanofibers and Pellet) and endogenous cartilage: conchal bowl, microtic ears, preauricular remnants, and rib...
October 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29055172/evaluation-of-the-antioxidant-impact-of-ginger-based-kombucha-on-the-murine-breast-cancer-model
#2
Samaneh Salafzoon, Hamideh Mahmoodzadeh Hosseini, Raheleh Halabian
Background Abnormal metabolism is a common event in cancerous cells. For example, the increase of reactive oxygen species (ROS) production, particularly due to aerobic respiration during invasive stage, results in cancer progression. Herein, the impact of kombucha tea prepared from ginger on the alteration of antioxidant agents was assessed in the breast cancer animal model. Methods Two types of kombucha tea with or without ginger were administered to BALB/c mice before and after tumor challenge. Superoxide dismutase (SOD), catalase, glutathione (GSH) and malondialdehyde (MDA) were evaluated in tumor, liver and kidney...
October 21, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/29055086/acute-mitogen-activated-protein-kinase-1-2-inhibition-improves-functional-recovery-and-vascular-changes-after-ischemic-stroke-in-rat-monitored-by-9-4-t-magnetic-resonance-imaging
#3
Maryam Mostajeran, Friedrich Wetterling, Frank W Blixt, Lars Edvinsson, Saema Ansar
AIM: The aim was to evaluate the beneficial effect of early mitogen activated protein kinase (MEK)1/2 inhibition administered at a clinical relevant time-point using the transient middle cerebral artery occlusion model and a dedicated rodent magnetic resonance imaging system (9.4T) to monitor cerebrovascular changes non-invasively for two weeks. METHOD: Transient middle cerebral artery occlusion was induced in male rats for two hours followed by reperfusion. The specific MEK1/2 inhibitor U0126 was administered i...
October 21, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29055017/new-generation-nanomedicines-constructed-from-self-assembling-small-molecule-prodrugs-alleviate-cancer-drug-toxicity
#4
Hangxiang Wang, Zhongjie Lu, Lijiang Wang, Tingting Guo, Jiaping Wu, Jianqin Wan, Liqian Zhou, Hui Li, Zhen Li, Donghai Jiang, Penghong Song, Haiyang Xie, Lin Zhou, Xiao Xu, Shusen Zheng
The therapeutic index for chemotherapeutic drugs is determined in part by systemic toxicity, so strategies for dose intensification to improve efficacy must also address tolerability. In addressing this issue, we have investigated a novel combinatorial strategy of reconstructing a drug molecule and using sequential drug-induced nanoassembly to fabricate supramolecular nanomedicines (SNM). Using cabazitaxel (CTX) as a target agent, we established that individual synthetic prodrugs tethered with polyunsaturated fatty acids were capable of recapitulating self-assembly behavior independent of exogenous excipients...
October 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/29054784/developing-a-xenograft-human-tumor-model-in-immunocompetent-mice
#5
Matthew T Basel, Sanjeev Narayanan, Chanran Ganta, Tej B Shreshta, Alejandro Marquez, Marla Pyle, Jennifer Hill, Stefan H Bossmann, Deryl L Troyer
Animal models are essential to cancer research, but current xenograft models are limited in their utility especially due to the lack of an immune system. Here we demonstrate that a xenograft tumor model can be developed in immunocompetent mice by tolerizing murine fetuses to human tumor cells. A375 human melanoma cells were injected into day E14 fetuses and after birth mice were challenged with A375 cells to determine their ability to develop tumors. Intravenous injections of cells resulted in metastatic-like lung tumors, which were verified to be human in origin by immunohistochemistry and PCR...
October 17, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29054733/disrupted-ionic-homeostasis-in-ischemic-stroke-and-new-therapeutic-targets
#6
REVIEW
Hui-Jie Hu, Mingke Song
BACKGROUND: Stroke is a leading cause of long-term disability. All neuroprotectants targeting excitotoxicity have failed to become stroke medications. In order to explore and identify new therapeutic targets for stroke, we here reviewed present studies of ionic transporters and channels that are involved in ischemic brain damage. METHOD: We surveyed recent literature from animal experiments and clinical reports in the databases of PubMed and Elsevier ScienceDirect to analyze ionic mechanisms underlying ischemic cell damage and suggest promising ideas for stroke therapy...
October 17, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29054721/characterizing-the-association-between-toll-like-receptor-subtypes-and-nephrolithiasis-with-renal-inflammation-in-an-animal-model
#7
Mahmut Taha Olcucu, Kerem Teke, Serdar Yalcin, Erkan Olcucuoglu, Vildan Caner, Nilay Sen Turk, Omer Levent Tuncay
OBJECTIVES: To show experimentally induced renal stone disease and evaluate secondary inflammatory responses in vivo, and to characterize changes in expression of Toll-like receptor (TLR) subtypes in this model. To evaluate the associations of hyperoxaluria-induced renal stone formation and Toll-like receptors (TLRs) expression in a rat inflammation model. METHODS: Twenty 5-6-week-old male Wistar rats were divided into control and hyperoxaluria groups (n=10/group) and supplied with normal water or 1% ethylene glycol, respectively, for 16 weeks...
October 17, 2017: Urology
https://www.readbyqxmd.com/read/29054692/plasmacytoid-dendritic-cells-drive-acute-exacerbations-of-asthma
#8
Aikaterini-Dimitra Chairakaki, Maria-Ioanna Saridaki, Katerina Pyrillou, Marios-Angelos Mouratis, Ourania Koltsida, Ross P Walton, Nathan W Bartlett, Athanasios Stavropoulos, Louis Boon, Nikoletta Rovina, Nikolaos G Papadopoulos, Sebastian L Johnston, Evangelos Andreakos
BACKGROUND: Although acute exacerbations, mostly triggered by viruses, account for the majority of hospitalizations in asthma, there is still very little known about the pathophysiological mechanisms involved. Plasmacytoid DCs (pDCs), prominent cells of antiviral immunity, exhibit pro-inflammatory or tolerogenic functions depending on the context, yet their involvement in asthma exacerbations remains unexplored. OBJECTIVES: We sought to investigate the role of pDCs in allergic airway inflammation and acute exacerbations of asthma...
October 17, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29054655/association-of-serum-levels-of-perfluoroalkyl-substances-pfass-with-the-metabolic-syndrome-mets-in-chinese-male-adults-a-cross-sectional-study
#9
Qiaoyun Yang, Xiaoli Guo, Pengling Sun, Yujiao Chen, Wei Zhang, Ai Gao
As extensively used chemicals in a variety of consumer products, perfluoroalkyl substances (PFASs) are ubiquitous and could bring significant risk to human health. However, the effect of PFASs on metabolic syndrome (MetS) is not fully understood. In 2015, a preliminary cross-sectional study was undertaken. A total of 148 male subjects including 81 affected by MetS and 67 non-MetS participants as the reference were recruited from Physical Examination Center affiliated to Capital Medical University, China. Serum levels of perfluorohexane sulfonic acid (PFHxS), perfluorooctanoic acid (PFOA) and perfluorononanoic acid (PFNA) were significantly higher in the subjects with MetS...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29054467/the-multi-dimensional-roles-of-astrocytes-in-als
#10
REVIEW
Koji Yamanaka, Okiru Komine
Despite significant progress in understanding the molecular and genetic aspects of amyotrophic lateral sclerosis (ALS), a fatal neurodegenerative disease characterized by the progressive loss of motor neurons, the precise and comprehensive pathomechanisms remain largely unknown. In addition to motor neuron involvement, recent studies using cellular and animal models of ALS indicate that there is a complex interplay between motor neurons and neighboring non-neuronal cells, such as astrocytes, in non-cell autonomous neurodegeneration...
October 17, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/29054387/the-post-natal-development-of-intraocular-pressure-in-normal-domestic-cats-felis-catus-and-in-feline-congenital-glaucoma
#11
Sara Adelman, Daniel Shinsako, Julie A Kiland, Vincent Yaccarino, N Matthew Ellinwood, Gil Ben-Shlomo, Gillian J McLellan
Intraocular pressure (IOP) is the most consistent risk factor for progressive vision loss in glaucoma. Cats with recessively inherited feline congenital glaucoma (FCG) exhibit elevated IOP with gradual, painless progression of glaucoma similar to humans and are studied as a model of glaucoma in humans and animals. Here, post-natal development of IOP was characterized in normal domestic cats and in cats with FCG caused by a homozygous LTBP2 mutation. Rebound tonometry (TonoVet(®), ICare Oy, Finland) was used to measure IOP non-invasively, 2-3 times weekly in 63 FCG and 33 normal kittens, of both sexes, from eyelid opening until 3-6 months of age...
October 17, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29054285/paraventricular-thalamus-gateway-to-feeding-appetitive-motivation-and-drug-addiction
#12
E Zayra Millan, ZhiYi Ong, Gavan P McNally
This chapter reviews the anatomical and functional evidence demonstrating the contribution of the paraventricular thalamic nucleus (PVT) to appetitive motivation, food intake control, and drug-seeking behaviors. We first consider the anatomical properties of the PVT to highlight its relevance in the control of appetitive motivation, feeding, and drug seeking. This is followed by a review of the available literature on PVT neurocircuitry, PVT involvement in food intake control, animal models of drug self-administration, withdrawal, and relapse...
2017: Progress in Brain Research
https://www.readbyqxmd.com/read/29054075/evaluation-of-immunological-markers-of-ovine-vaginal-irritation-implications-for-preclinical-assessment-of-non-vaccine-hiv-preventive-agents
#13
Gregg N Milligan, Gracie Vargas, Kathleen L Vincent, Yong Zhu, Nigel Bourne, Massoud Motamedi
The presence of genital inflammatory responses and a compromised vaginal epithelial barrier have been linked to an increased risk of HIV acquisition. It is important to assure that application of candidate microbicides designed to limit HIV transmission will not cause these adverse events. We previously developed high resolution in vivo imaging methodologies in sheep to assess epithelial integrity following vaginal application of a model microbicide, however characterization of genital inflammation in sheep has not been previously possible...
October 13, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29053787/humanized-mutant-fus-drives-progressive-motor-neuron-degeneration-without-aggregation-in-fusdelta14-knockin-mice
#14
Anny Devoy, Bernadett Kalmar, Michelle Stewart, Heesoon Park, Beverley Burke, Suzanna J Noy, Yushi Redhead, Jack Humphrey, Kitty Lo, Julian Jaeger, Alan Mejia Maza, Prasanth Sivakumar, Cinzia Bertolin, Gianni Soraru, Vincent Plagnol, Linda Greensmith, Abraham Acevedo Arozena, Adrian M Isaacs, Benjamin Davies, Pietro Fratta, Elizabeth M C Fisher
Mutations in FUS are causative for amyotrophic lateral sclerosis with a dominant mode of inheritance. In trying to model FUS-amyotrophic lateral sclerosis (ALS) in mouse it is clear that FUS is dosage-sensitive and effects arise from overexpression per se in transgenic strains. Novel models are required that maintain physiological levels of FUS expression and that recapitulate the human disease-with progressive loss of motor neurons in heterozygous animals. Here, we describe a new humanized FUS-ALS mouse with a frameshift mutation, which fulfils both criteria: the FUS Delta14 mouse...
October 7, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29053754/coming-of-age-do-female-harbour-porpoises-phocoena-phocoena-from-the-north-sea-and-baltic-sea-have-sufficient-time-to-reproduce-in-a-human-influenced-environment
#15
Tina Kesselring, Sacha Viquerat, Ralph Brehm, Ursula Siebert
The harbour porpoise is the only cetacean species native to German waters. Since human pressures are suggested to shorten their reproductive lifespan, basic knowledge on reproduction is strongly required. One parameter is the onset of sexual maturity in female harbour porpoises. Therefore, we investigated the first signs of sexual maturity for a period of almost two decades (1990-2016). Ovaries from 111 female harbour porpoises from the German North Sea and Baltic Sea were examined for the presence and morphological structure of follicles, corpora lutea and corpora albicantia...
2017: PloS One
https://www.readbyqxmd.com/read/29053743/in-vitro-modeling-of-experimental-succinic-semialdehyde-dehydrogenase-deficiency-ssadhd-using-brain-derived-neural-stem-cells
#16
Kara R Vogel, Garrett R Ainslie, Erwin E Jansen, Gajja S Salomons, Jean-Baptiste Roullet, K Michael Gibson
We explored the utility of neural stem cells (NSCs) as an in vitro model for evaluating preclinical therapeutics in succinic semialdehyde dehydrogenase-deficient (SSADHD) mice. NSCs were obtained from aldh5a1+/+ and aldh5a1-/- mice (aldh5a1 = aldehyde dehydrogenase 5a1 = SSADH). Multiple parameters were evaluated including: (1) production of GHB (γ-hydroxybutyrate), the biochemical hallmark of SSADHD; (2) rescue from cell death with the dual mTOR (mechanistic target of rapamycin) inhibitor, XL-765, an agent previously shown to rescue aldh5a1-/- mice from premature lethality; (3) mitochondrial number, total reactive oxygen species, and mitochondrial superoxide production, all previously documented as abnormal in aldh5a1-/- mice; (4) total ATP levels and ATP consumption; and (5) selected gene expression profiles associated with epilepsy, a prominent feature in both experimental and human SSADHD...
2017: PloS One
https://www.readbyqxmd.com/read/29053735/characterization-of-the-first-knock-out-aldh7a1-zebrafish-model-for-pyridoxine-dependent-epilepsy-using-crispr-cas9-technology
#17
Nikita Zabinyakov, Garrett Bullivant, Feng Cao, Matilde Fernandez Ojeda, Zheng Ping Jia, Xiao-Yan Wen, James J Dowling, Gajja S Salomons, Saadet Mercimek-Andrews
Pyridoxine dependent epilepsy (PDE) is caused by likely pathogenic variants in ALDH7A1 (PDE-ALDH7A1) and inherited autosomal recessively. Neurotoxic alpha-amino adipic semialdehyde (alpha-AASA), piperideine 6-carboxylate and pipecolic acid accumulate in body fluids. Neonatal or infantile onset seizures refractory to anti-epileptic medications are clinical features. Treatment with pyridoxine, arginine and lysine-restricted diet does not normalize neurodevelopmental outcome or accumulation of neurotoxic metabolites...
2017: PloS One
https://www.readbyqxmd.com/read/29053700/come-to-the-light-side-in-vivo-monitoring-of-pseudomonas-aeruginosa-biofilm-infections-in-chronic-wounds-in-a-diabetic-hairless-murine-model
#18
Alessandra M Agostinho Hunt, Jacob A Gibson, Casandra L Larrivee, Sandra O'Reilly, Svetlana Navitskaya, Julia V Busik, Christopher M Waters
The presence of bacteria as structured biofilms in chronic wounds, especially in diabetic patients, is thought to prevent wound healing and resolution. Chronic mouse wounds models have been used to understand the underlying interactions between the microorganisms and the host. The models developed to date rely on the use of haired animals and terminal collection of wound tissue for determination of viable bacteria. While significant insight has been gained with these models, this experimental procedure requires a large number of animals and sampling is time consuming...
October 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29053697/stereotactically-guided-ablation-of-the-rat-auditory-cortex-and-localization-of-the-lesion-in-the-brain
#19
Verónica Lamas, Sheila Estévez, Marianni Pernía, Ignacio Plaza, Miguel A Merchán
The rat auditory cortex (AC) is becoming popular among auditory neuroscience investigators who are interested in experience-dependence plasticity, auditory perceptual processes, and cortical control of sound processing in the subcortical auditory nuclei. To address new challenges, a procedure to accurately locate and surgically expose the auditory cortex would expedite this research effort. Stereotactic neurosurgery is routinely used in pre-clinical research in animal models to engraft a needle or electrode at a pre-defined location within the auditory cortex...
October 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29053693/in-vivo-tracking-of-human-adipose-derived-mesenchymal-stem-cells-in-a-rat-knee-osteoarthritis-model-with-fluorescent-lipophilic-membrane-dye
#20
Meng Li, Ming Hao, Dong Jiang, Yanxi Chen, Wen Wang
In order to support the clinical application of human adipose-derived mesenchymal stem cell (haMSC) therapy for knee osteoarthritis (KOA), we examined the efficacy of cell persistence and biodistribution of haMSCs in animal models. We demonstrated a method to label the cell membrane of haMSCs with lipophilic fluorescent dye. Subsequently, intra-articular injection of the labeled cells in rats with surgically induced KOA was monitored dynamically by an in vivo imaging system. We employed the lipophilic carbocyanines DiD (DilC18 (5)), a far-red fluorescent Dil (dialkylcarbocyanines) analog, which utilized a red laser to avoid excitation of the natural green autofluorescence from surrounding tissues...
October 8, 2017: Journal of Visualized Experiments: JoVE
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