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https://www.readbyqxmd.com/read/29242634/extracellular-matrix-alterations-after-blood-instillation-in-tunica-albuginea-of-rats
#1
David J Cohen, André V Oliveira, Théresè R Theodoro, Giuliana Petri, Carina M Melo, Renan P Cavalheiro, Helena B Nader, Ana M Mader, Maria A S Pinhal, Sidney Glina
The cause of Peyronie's disease (PD) is still not completely understood. The objective of this study, therefore, was to analyze the histological and biochemical alterations that occur after the instillation of blood in the tunica albuginea (TA) of rats with an emphasis on the remodeling process of ECM. Thirty male Wistar rats were divided into 4 groups: two control groups with instillation of distilled water in TA followed by penectomy after 15 days or 45 days, respectively and two experimental groups with instillation of blood in TA followed by penectomy after 15 days or 45 days, respectively...
December 15, 2017: International Journal of Impotence Research
https://www.readbyqxmd.com/read/29241303/body-fluid-status-assessment-by-bio-impedance-analysis-in-patients-presenting-to-the-emergency-department-with-dyspnea
#2
Chan Soon Park, Sang-Eun Lee, Hyun-Jai Cho, Yong-Jin Kim, Hyun-Jae Kang, Byung-Hee Oh, Hae-Young Lee
Background/Aims: Fluid retention occurs in patients with heart failure, accounting for dyspnea. We investigated the diagnostic implication of body fluid status, assessed by bio-impedance analysis (BIA), in acute heart failure (AHF) among patients who presented with dyspnea. Methods: A total of 100 patients who presented with dyspnea and suspected with AHF were analyzed in this study. We enrolled 50 AHF and 50 non-AHF patients discriminated through echocardiographic analysis and Framingham criteria and were matched by age and sex...
December 18, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29236244/evaluation-of-disinfection-by-product-formation-during-chlor-am-ination-from-algal-organic-matter-after-uv-irradiation
#3
Shi Chen, Jing Deng, Lei Li, Naiyun Gao
This study evaluated the effect of low-pressure ultraviolet (UV) irradiation on the formation of disinfection by-products (DBPs) from algal organic matter of Microcystis aeruginosa during subsequent chlorination and chloramination. The algal organic matter includes extracellular organic matter (EOM) and intracellular organic matter (IOM). The fluorescence excitation-emission matrix spectra indicated that the humic/fulvic acid-like organics of EOM and the protein-like organics of IOM may be preferentially degraded by UV treatment...
December 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29233710/magnetic-field-driven-drug-release-from-modified-iron-oxide-integrated-polysaccharide-hydrogel
#4
Xinyu Hu, Yongmei Wang, Liangliang Zhang, Man Xu, Jianfa Zhang, Wei Dong
Salecan is a novel water-soluble extracellular β-glucan and suitable for the hydrogel preparation due to its excellent physicochemical and biological properties. The present article describes the fabrication and characterization of a pH/magnetic field-driven hydrogel based on salecan-g-poly(vinylacetic acid-co-2-hydroxyethyl acrylate) [poly(VA-co-HEA)] copolymer and Fe3O4@Agarose nanoparticles for drug release testing. Vibrating sample magnetometer characterization verified that integration of Fe3O4@Agarose nanoparticles in the copolymer provided the sensitivity to magnetic fields...
December 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29229906/direction-of-actin-flow-dictates-integrin-lfa-1-orientation-during-leukocyte-migration
#5
Pontus Nordenfelt, Travis I Moore, Shalin B Mehta, Joseph Mathew Kalappurakkal, Vinay Swaminathan, Nobuyasu Koga, Talley J Lambert, David Baker, Jennifer C Waters, Rudolf Oldenbourg, Tomomi Tani, Satyajit Mayor, Clare M Waterman, Timothy A Springer
Integrin αβ heterodimer cell surface receptors mediate adhesive interactions that provide traction for cell migration. Here, we test whether the integrin, when engaged to an extracellular ligand and the cytoskeleton, adopts a specific orientation dictated by the direction of actin flow on the surface of migrating cells. We insert GFP into the rigid, ligand-binding head of the integrin, model with Rosetta the orientation of GFP and its transition dipole relative to the integrin head, and measure orientation with fluorescence polarization microscopy...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229864/cytoplasmic-cl-couples-membrane-remodeling-to-epithelial-morphogenesis
#6
Mu He, Wenlei Ye, Won-Jing Wang, Eirish S Sison, Yuh Nung Jan, Lily Yeh Jan
Chloride is the major free anion in the extracellular space (>100 mM) and within the cytoplasm in eukaryotes (10 ∼ 20 mM). Cytoplasmic Cl- level is dynamically regulated by Cl- channels and transporters. It is well established that movement of Cl- across the cell membrane is coupled with cell excitability through changes in membrane potential and with water secretion. However, whether cytoplasmic Cl- plays additional roles in animal development and tissue homeostasis is unknown. Here we use genetics, cell biological and pharmacological tools to demonstrate that TMEM16A, an evolutionarily conserved calcium-activated chloride channel (CaCC), regulates cytoplasmic Cl- homeostasis and promotes plasma membrane remodeling required for mammalian epithelial morphogenesis...
December 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29229533/xanthoceraside-attenuates-amyloid-%C3%AE-peptide1-42-induced-memory-impairments-by-reducing-neuroinflammatory-responses-in-mice
#7
Yue Qi, Xue-Fei Ji, Tian-Yan Chi, Peng Liu, Ge Jin, Qian Xu, Qing Jiao, Li-Hua Wang, Li-Bo Zou
Xanthoceraside, a novel triterpenoid saponin extracted from the husks of Xanthoceras sorbifolia Bunge, has neuroprotective effects in vivo and anti-inflammatory properties in vitro. However, the exact mechanism of xanthoceraside on anti-amyloid beta (Aβ)-induced neuroinflammatory responses has not been elucidated. Therefore, we used intracerebroventricular injection of amyloid 1-42 (Aβ1-42) to establish a mouse model to test the effects of xanthoceraside on Aβ-induced cognitive impairments and the TLR2/NF-κB and MAPK pathways...
December 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29228693/bone-marrow-stem-cells-derived-extracellular-matrix-is-a-promising-material
#8
Xiaoyan Wang, Guanghua Chen, Chao Huang, Hualei Tu, Jilong Zou, Jinglong Yan
The extracellular matrix(ECM), which is primarily composed of collagens and proteoglycans, plays a key role in cell proliferation, differentiation, and migration and interactions between cells. In this study, we produced chitosan/gelatin/bone marrow stem cells-derived extracellular matrix(C/G/BMSCs-dECM) scaffolds via lyophilization and cross-linking, and chitosan/gelatin(C/G) scaffolds were used as controls. For the C/G/BMSCs-dECM scaffolds, the average pore size was 289.17 ± 80.28 μm; the average porosity was 89...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29227016/patients-with-chronic-bipolar-disorder-exhibit-widespread-increases-in-extracellular-free-water
#9
Carissa Tuozzo, Amanda E Lyall, Ofer Pasternak, Anthony C D James, Timothy J Crow, Marek Kubicki
OBJECTIVES: Bipolar disorder (BP) is a debilitating psychiatric disease that is not well understood. Previous diffusion magnetic resonance imaging (dMRI) studies of BP patients found prominent microstructural white matter (WM) abnormalities of reduced fractional anisotropy (FA). Because FA is a nonspecific measure, relating these abnormalities to a specific pathology is difficult. Here, dMRI specificity was increased by free water (FW) imaging, which allows identification of changes in extracellular space (FW) from neuronal tissue (fractional anisotropy of tissue [FA-t])...
December 11, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/29225284/characterization-of-extracellular-matrix-components-from-the-desiccation-tolerant-cyanobacterium-nostoc-commune
#10
Kaori Inoue-Sakamoto, Yasunori Tanji, Minami Yamaba, Takumi Natsume, Takuya Masaura, Tomoya Asano, Takumi Nishiuchi, Toshio Sakamoto
The terrestrial cyanobacterium Nostoc commune forms macroscopic colonies in its natural habitats, and these colonies consist of both cellular filaments and massive extracellular matrixes. In this study, the biochemical features of the extracellular matrix components were investigated. Naturally growing N. commune was tolerant to desiccation, and produced massive extracellular polysaccharides that contained both neutral sugars and glucuronic acid as constituent monosaccharides. The extracellular polysaccharide contents and desiccation tolerance were compared in laboratory culture strains of Nostoc species...
December 8, 2017: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/29222871/myelin-extracellular-leaflet-compaction-requires-apolipoprotein-d-membrane-management-to-optimize-lysosomal-dependent-recycling-and-glycocalyx-removal
#11
Nadia García-Mateo, Raquel Pascua-Maestro, Alberto Pérez-Castellanos, Concepción Lillo, Diego Sanchez, Maria D Ganfornina
To compact the extracellular sides of myelin, an important transition must take place: from membrane sliding, while building the wraps, to membrane adhesion and water exclusion. Removal of the negatively charged glycocalyx becomes the limiting factor in such transition. What is required to initiate this membrane-zipping process? Knocking-out the Lipocalin Apolipoprotein D (ApoD), essential for lysosomal functional integrity in glial cells, results in a specific defect in myelin extracellular leaflet compaction in peripheral and central nervous system, which results in reduced conduction velocity and suboptimal behavioral outputs: motor learning is compromised...
December 9, 2017: Glia
https://www.readbyqxmd.com/read/29221723/effects-of-thyroxine-on-expression-of-proteins-related-to-thyroid-hormone-functions-tr-%C3%AE-tr-%C3%AE-rxr-and-erk1-2-in-uterus-during-peri-implantation-period
#12
Abu Sadat Md Sayem, Nelli Giribabu, Sekaran Muniandy, Naguib Salleh
INTRODUCTION: Thyroid hormone is known to play important role during embryo implantation, however mechanisms underlying its actions in uterus during peri-implantation period has not been fully identified. In this study, we hypothesized that thyroid hormone could affect expression of proteins related to its function, where these could explain mechanisms for its action in uterus during this period. METHODS: Female rats, once rendered hypothyroid via oral administration of methimazole (0...
December 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29216539/influence-of-extracellular-environment-on-the-motility-and-structural-properties-of-spermatozoa-collected-from-hormonally-stimulated-panamanian-golden-frog-atelopus-zeteki
#13
Gina Della Togna, Brian Gratwicke, Matthew Evans, Lauren Augustine, Han Chia, Ed Bronikowski, James B Murphy, Pierre Comizzoli
A better understanding of the factors influencing the biology of amphibian spermatozoa after release from the testis is a prerequisite to the development of sperm preservation methods. The objective of the study was to determine the effect of extracellular conditions (exposure to water and different temperatures) over time on the sperm motility and structural properties (including morphology and DNA integrity) collected from hormonally stimulated Atelopus zeteki. Following intraperitoneal injection of gonadotropin-releasing hormone agonist (des-Gly10, D-Ala6, Pro-NHEt9 GnRH; 4 μg/g of body weight), human chorionic gonadotropin (hCG, 10 IU/gbw), or Amphiplex™ (0...
November 29, 2017: Theriogenology
https://www.readbyqxmd.com/read/29214739/evaluation-of-intradialytic-hypertension-using-bioelectrical-impedance-combined-with-echocardiography-in-maintenance-hemodialysis-patients
#14
Hongqi Ren, Dehua Gong, Xu He, Fengyu Jia, Qunpeng He, Bin Xu, Zhihong Liu
Although intra-dialytic hypertension (IDH) has been noted in clinical settings for many years, its pathogenesis remains unclear. In this cross-sectional study, we analyzed IDH incidence in our center and the correlation between postdialysis volume state and IDH. One hundred thirty-one maintenance hemodialysis (MHD) patients were enrolled in our study, and bioelectrical impedance (BIA) and echocardiography (ECG) were recorded. In addition, demographic data were collected, and laboratory examinations were conducted...
December 7, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/29214724/cme-1-a-novel-polysaccharide-suppresses-inos-expression-in-lipopolysaccharide-stimulated-macrophages-through-ceramide-initiated-protein-phosphatase-2a-activation
#15
Joen-Rong Sheu, Zhih-Cherng Chen, Ming-Jen Hsu, Shwu-Huey Wang, Kuo-Wei Jung, Wei-Fan Wu, Szu-Han Pan, Ruei-Dun Teng, Chih-Hao Yang, Cheng-Ying Hsieh
CME-1, a novel water-soluble polysaccharide purified from Ophiocordyceps sinensis mycelia, has anti-oxidative, antithrombotic and antitumour properties. In this study, other major attributes of CME-1, namely anti-inflammatory and immunomodulatory properties, were investigated. Treating lipopolysaccharide (LPS)-stimulated RAW 264.7 cells with CME-1 concentration-dependently suppressed nitric oxide formation and inducible nitric oxide synthase (iNOS) expression. In the CME-1-treated RAW 264.7 cells, LPS-induced IκBα degradation and the phosphorylation of p65, Akt and mitogen-activated protein kinases (MAPKs), including extracellular signal-regulated kinase, c-Jun N-terminal kinase and p38, were reduced...
December 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29214173/fabrication-and-in-vitro-study-of-tissue-engineered-cartilage-scaffold-derived-from-wharton-s-jelly-extracellular-matrix
#16
Tongguang Xiao, Weimin Guo, Mingxue Chen, Chunxiang Hao, Shuang Gao, Jingxiang Huang, Zhiguo Yuan, Yu Zhang, Mingjie Wang, Penghao Li, Jiang Peng, Aiyuan Wang, Yu Wang, Xiang Sui, Li Zhang, Wenjing Xu, Shibi Lu, Heyong Yin, Jianhua Yang, Shuyun Liu, Quanyi Guo
The scaffold is a key element in cartilage tissue engineering. The components of Wharton's jelly are similar to those of articular cartilage and it also contains some chondrogenic growth factors, such as insulin-like growth factor I and transforming growth factor-β. We fabricated a tissue-engineered cartilage scaffold derived from Wharton's jelly extracellular matrix (WJECM) and compared it with a scaffold derived from articular cartilage ECM (ACECM) using freeze-drying. The results demonstrated that both WJECM and ACECM scaffolds possessed favorable pore sizes and porosities; moreover, they showed good water uptake ratios and compressive moduli...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29212765/changes-in-the-fluid-volume-balance-between-intra-and-extracellular-water-in-a-sample-of-japanese-adults-aged-15-88-years-old-a-cross-sectional-study
#17
Yasushi Ohashi, Nobuhiko Joki, Keisuke Yamazaki, Takeshi Kawamura, Reibin Tai, Hideyo Oguchi, Rena Yuasa, Ken Sakai
The fluid volume balance between intracellular water (ICW) and extracellular water (ECW) gradually changes with age and various medical conditions. Comprehension of these physiological changes would aid in clinical decision-making related to body fluid assessments. A total of 1,992 individuals (753 men and 1,239 women) aged ≥15 years included in this study had their body composition measurements performed at training gyms in 2014. We developed a regression formula to assess the association of age with the ratio of ECW to ICW in these subjects...
December 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29211965/early-detection-of-biofouling-on-water-purification-membranes-by-ambient-ionization-mass-spectrometry-imaging
#18
Swathy Jakka Ravindran, Ramesh Kumar, Amitava Srimany, Ligy Philip, Thalappil Pradeep
By direct analysis of water purification membranes using ambient ionization mass spectrometry, an attempt has been made to understand the molecular signatures of bacterial fouling. Membrane based purification methods are used extensively in water treatment and a major challenge for them is biofouling. The build-up of microbes and their extracellular polymeric matrix clog the membranes and reduce their efficiency. To understand the early stages of bacterial fouling on water purification membranes, we have used Desorption Electrospray Ionization Mass Spectrometry (DESI MS), where ion formation occurs in ambient conditions and the ionization event is surface sensitive...
December 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29211680/the-impact-of-water-on-the-ambivalent-behavior-and-paradoxical-phenomenon-of-the-amyloid-%C3%AE-fibril-protein
#19
Tamás Vajda, András Perczel
The crucial role of water in amyloid-β(Aβ) fibril proteins is evaluated in several ways including the water's thermodynamic and kinetic solvation effects. As regards the water's character, its hindered-rotation barriers are also considered. The following protein molecules considered here are: the Aβ40 (PDB ID: 2LMN), Aβ42 (PDB ID: 5KK3 and 2NAO) and the double-layered Aβ17-42 fibril. We discuss: (i) extracellular Aβ40 and Aβ42 fibril monomers exhibit an ambivalent propensity to transform into a helical form toward the N-term region and a β-strand-like form near the C-terminal; (ii) interfacial water molecules play a crucial role in protein-protein interactions, as molecular dynamics simulations have shown a significant impact on the protein-protein binding; (iii) it is shown that the spontaneous dimerization process of the Aβ42 fibril protein in water occurs via a two-step nucleation-accommodation mechanism; (iv) MD simulations of the double-layered Aβ17-42 fibril model show that the C↔C interface appears more energetically favorable than the N↔N interface due to large hydrophobic contacts; (v) the water's role in the HET-s prion and in the Aβ fibrillar aggregates; (vi) it was found that the monomer-oligomer equilibrium spontaneously dissociates into stable monomeric species when they are incubated up to 3 μm for a longer time (>1 week) in a physiological buffer...
December 20, 2017: Biomolecular Concepts
https://www.readbyqxmd.com/read/29204679/gestational-exposure-to-inorganic-arsenic-ias3-alters-glutamate-disposition-in-the-mouse-hippocampus-and-ionotropic-glutamate-receptor-expression-leading-to-memory-impairment
#20
Janikua Nelson-Mora, Martha L Escobar, Luis Rodríguez-Durán, Lourdes Massieu, Teresa Montiel, Verónica M Rodríguez, Karina Hernández-Mercado, María E Gonsebatt
Early life exposure to environmental pollutants and toxic chemicals has been linked to learning and behavioral alterations in children. iAs exposure is associated with different types neurological disorders such as memory and learning impairment. iAs is methylated in the brain by the arsenic III-methyltransferase in a process that requires glutathione (GSH). The xCT-antiporter cell membrane transporter participates in the influx of cystine for GSH synthesis in exchange for glutamate in a 1:1 ratio. In CD-1 mice gestationally exposed to 20 ppm of sodium arsenite in drinking water, we have previously observed up-regulation of xCT in the male mouse hippocampus which caused glutamatergic synapse alterations affecting learning and memory processes...
December 4, 2017: Archives of Toxicology
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