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https://www.readbyqxmd.com/read/28434676/meta-analysis-of-results-of-testosterone-therapy-on-sexual-function-based-on-international-index-of-erectile-function-scores
#1
Giovanni Corona, Giulia Rastrelli, Abraham Morgentaler, Alessandra Sforza, Edoardo Mannucci, Mario Maggi
CONTEXT: The interpretation of available clinical evidence related to the effect of testosterone (T) treatment (TTh) on sexual function has been inconsistent, in part due to the use of different and self-reported measures to assess outcomes. The International Index of Erectile Function (IIEF) is the most frequently used validated tool to assess male sexual function. OBJECTIVE: To perform a meta-analysis of available data evaluating the effect of TTh on male sexual function using IIEF as the primary outcome...
April 20, 2017: European Urology
https://www.readbyqxmd.com/read/28433921/a-contribution-to-the-phylogeny-of-agglutinating-arcellinida-amoebozoa-based-on-ssu-rrna-gene-sequences
#2
Fatma Gomaa, Daniel J G Lahr, Milcho Todorov, Jingchun Li, Enrique Lara
Arcellinid testate amoebae include a wide variety of amoeboid organisms whose test (shell) varies in shape, composition and size. A decade ago, we initiated molecular phylogenetic analyses based on SSU rRNA gene sequences and a taxonomic revision of Arcellinida. However, many lineages within Arcellinida still lack molecular data, and the phylogeny of this group is largely incomplete. In this study, we obtained SSU rRNA gene sequences from seven taxa, of which six have agglutinated shell (Difflugia oblonga, D...
April 3, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28433809/biocorona-formation-on-gold-nanoparticles-modulates-human-proximal-tubule-kidney-cell-uptake-cytotoxicity-and-gene-expression
#3
M T Ortega, J E Riviere, K Choi, N A Monteiro-Riviere
Gold nanoparticles (AuNP) adsorb macromolecules to form a protein corona (PC) after systemic delivery, to which the kidney as the primary excretory organ is constantly exposed. The role of the PC on AuNP cell uptake and toxicity was investigated in vitro in human proximal tubule cells (HPTC) using 40 and 80nm branched polyethylenimine (BPEI), lipoic acid (LA) and polyethylene glycol (PEG) coated AuNP with or without (bare) PCs composed of human plasma (HP) or human serum albumin (HSA) for 0.25 to 24h. Time-dependent intracellular uptake, assessed by ICP-MS showed PC modulated cell uptake and cytotoxicity; with bare 40nm BPEI-AuNP showing the greatest responses...
April 19, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28431605/global-brain-atrophy-and-metabolic-dysfunction-in-lgi1-encephalitis-a-prospective-multimodal-mri-study
#4
Monika Szots, Morten Blaabjerg, Gergely Orsi, Pernille Iversen, Daniel Kondziella, Camilla G Madsen, Ellen Garde, Peter O Magnusson, Peter Barsi, Ferenc Nagy, Hartwig R Siebner, Zsolt Illes
BACKGROUND: Chronic cognitive deficits are frequent in leucin-rich glioma-inactivated 1 protein (LGI1) encephalitis. We examined structural and metabolic brain abnormalities following LGI1 encephalitis and correlated findings with acute and follow-up clinical outcomes. METHODS: Nine patients underwent prospective multimodal 3 Tesla MRI 33.1±18months after disease onset, including automated volumetry, diffusion tensor imaging (DTI) and magnetic resonance spectroscopy (MRS)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28430741/utility-of-8%C3%A2-h-and-time-decay-corrected-acquisition-scintigraphy-with-in-vitro-labeled-white-blood-cells-for-the-diagnosis-of-osteoarticular-infection
#5
Edel Noriega Álvarez, Guillermo A Martínez Pimienta, Ana M Benítez Segura, María T Bajén Lázaro, Alba Rodrígez-Gasén, Julio Rodríguez-Rubio Corona, Jaime Mora Salvadó
INTRODUCTION: Except in the spine, labeled white-blood cell scintigraphy (WBCS) with image acquisition up to 24 h is the nuclear medicine test of choice for diagnosing osteoarticular infection. However, distinguishing between inflammation and infection is a challenge. OBJECTIVES: The first aim of this study was to verify earlier research studies that used 4 and 24 h time decay-corrected acquisition (TDCA) to differentiate infection from inflammation. The second aim was to analyze whether 8 h acquisition (1-day protocol) yielded similar results as 20-24 h acquisition...
April 20, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28430290/frequency-and-topography-of-small-cerebrovascular-lesions-in-vascular-and-in-mixed-dementia-a-post-mortem-7-tesla-magnetic-resonance-imaging-study-with-neuropathological-correlates
#6
Jacques De Reuck, Florent Auger, Nicolas Durieux, Vincent Deramecourt, Claude-Alain Maurage, Charlotte Cordonnier, Florence Pasquier, Didier Leys, Regis Bordet
<i><b>Introduction</b>: Mixed dementia (MixD) refers to a combination of definite Alzheimer's disease (AD) and vascular encephalopathy. The existence of a "pure" type of vascular dementia (VaD) is controversial. There is a need to find magnetic resonance imaging (MRI) characteristics allowing the distinction between VaD and MixD. The present post-mortem 7.0-tesla MRI compares the frequency or severity and the topography of the small cerebrovascular lesions in brains of patients with VaD and with MixD...
2017: Folia Neuropathologica
https://www.readbyqxmd.com/read/28429028/experimental-separation-steps-influence-the-protein-content-of-corona-around-mesoporous-silica-nanoparticles
#7
C Pisani, J C Gaillard, C Dorandeu, C Charnay, Y Guari, J Chopineau, J M Devoisselle, J Armengaud, O Prat
In order to direct nanocarriers to their targets efficiently, we have to understand the interactions occurring at the nano-bio interface between nanocarriers and human proteins, which forms the layer called the corona. However, experiments aiming to identify and quantify the proteins in the corona, especially critical steps in the separation of nanoparticles from biological media may affect the corona composition. Here, we used nano-LC MS/MS to compare the protein corona contents obtained after using two different separation methods...
April 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28420299/surface-chemistry-of-gold-nanoparticles-determines-the-biocorona-composition-impacting-cellular-uptake-toxicity-and-gene-expression-profiles-in-human-endothelial-cells
#8
Parwathy Chandran, Jim E Riviere, Nancy A Monteiro-Riviere
This study investigated the role of nanoparticle size and surface chemistry on biocorona composition and its effect on uptake, toxicity and cellular responses in human umbilical vein endothelial cells (HUVEC), employing 40 and 80 nm gold nanoparticles (AuNP) with branched polyethyleneimine (BPEI), lipoic acid (LA) and polyethylene glycol (PEG) coatings. Proteomic analysis identified 59 hard corona proteins among the various AuNP, revealing largely surface chemistry-dependent signature adsorbomes exhibiting human serum albumin (HSA) abundance...
April 19, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28419914/longitudinal-changes-in-pubertal-maturation-and-white-matter-microstructure
#9
Megan M Herting, Robert Kim, Kristina A Uban, Eric Kan, Andrea Binley, Elizabeth R Sowell
Emerging evidence in the field of adolescent neurodevelopment suggests that pubertal processes may contribute to known trajectories of brain maturation, and may contribute, in part, to sex differences in related cognitive, behavioral and mental health outcomes. The current longitudinal study examined how changes in physical pubertal maturation (measured by the Peterson Developmental Scale) predict changes in white matter microstructure in 18 boys and 15 girls over an approximate 2-year follow-up period, while accounting for age...
March 30, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28418197/body-mass-index-associates-with-white-matter-microstructure-in-bipolar-depression
#10
Elena Mazza, Sara Poletti, Irene Bollettini, Clara Locatelli, Andrea Falini, Cristina Colombo, Francesco Benedetti
OBJECTIVES: Obesity has been reported in over 60% of bipolar disorder (BD) patients. It worsens the severity of illness, and influences cognition and functional outcomes. White matter (WM) abnormalities are one of the most consistently reported findings in neuroimaging studies of BD. We hypothesized that body mass index (BMI) could correlate with WM integrity in bipolar patients. METHODS: We evaluated BMI in a sample of 164 depressed patients affected by BD. We performed whole-brain tract-based spatial statistics with threshold-free cluster enhancement for the diffusion tensor imaging (DTI) measures of WM integrity: fractional anisotropy; axial, radial, and mean diffusivity...
April 18, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28417127/on-the-formation-of-stripe-sigma-and-honeycomb-phases-in-a-core-corona-system
#11
Harini Pattabhiraman, Marjolein Dijkstra
Using Monte Carlo simulations and free-energy calculations, we investigate the phase behaviour of a two-dimensional core-corona system. We model this system as particles consisting of an impenetrable hard core of diameter σHD surrounded by a purely repulsive soft corona of diameter δ = 1.95σHD. At low densities, we observe the spontaneous formation of a phase with a stripe texture as well as a honeycomb-like phase driven by both energy and entropy considerations. At high densities, we find that a two-dimensional analogue of the periodic sigma phase, considered as an approximant of dodecagonal quasicrystals, is energetically stabilised with respect to two distinct dodecagonal quasicrystals, namely, a square-triangle tiling and a square-triangle-shield tiling...
April 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28416470/block-ionomer-micellar-nanoparticles-from-double-hydrophilic-copolymers-classifications-and-promises-for-delivery-of-cancer-chemotherapeutics
#12
REVIEW
S S Abolmaali, A M Tamaddon, M Salmanpour, S Mohammadi, R Dinarvand
A class of double hydrophilic copolymers comprising ionic and nonionic water-soluble blocks, which are also called block ionomers, represent an interesting type of polymer assembly forming stable, homogeneous core-corona dispersions. They exhibit the solution behavior of normal polyelectrolytes, whereas assembly into micelle, vesicle or disk morphology happens by an external stimulus (pH, temperature or ionic strength) or complex formation with metal ions, ionic surfactants, polyelectrolytes, etc. Temperature, pH, redox or salt sensitivity affords a unique opportunity to control the triggered release of payloads accommodated through electrostatic interaction, coordination or chemical conjugation...
April 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28415450/impact-of-silica-nanoparticle-surface-chemistry-on-protein-corona-formation-and-consequential-interactions-with-biological-cells
#13
Andréa Kurtz-Chalot, Christian Villiers, Jérémie Pourchez, Delphine Boudard, Matteo Martini, Patrice N Marche, Michèle Cottier, Valérie Forest
Nanoparticles (NP) physico-chemical features greatly influence NP/cell interactions. NP surface functionalization is often used to improve NP biocompatibility or to enhance cellular uptake. But in biological media, the formation of a protein corona adds a level of complexity. The aim of this study was to investigate in vitro the influence of NP surface functionalization on their cellular uptake and the biological response induced. 50nm fluorescent silica NP were functionalized either with amine or carboxylic groups, in presence or in absence of polyethylene glycol (PEG)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415410/biodegradable-polyurethane-micelles-with-ph-and-reduction-responsive-properties-for-intracellular-drug-delivery
#14
Yayuan Guan, Yuling Su, Lili Zhao, Fancui Meng, Quanxin Wang, Yongchao Yao, Jianbin Luo
Polyurethane micelles with disulfide linkage located at the interface of hydrophilic shell and hydrophobic core (PU-SS-I) have been shown enhanced drug release profiles. However, the payloads could not be released completely. The occurrence of aggregation of hydrophobic cores upon shedding hydrophilic PEG coronas was considered as the reason for the incomplete release. To verify the above hypothesis and to develop a new polyurethane based micelles with dual stimuli respond properties and controllable location of pH and reduction responsive groups in the PU main chains, a tertiary amine was incorporated into the hydrophobic core PU-SS-I, which resulted polyurethane with both reduction and pH sensitive properties (PU-SS-N)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28414772/the-nanoparticle-protein-corona-formed-in-human-blood-or-human-blood-fractions
#15
Martin Lundqvist, Cecilia Augustsson, Malin Lilja, Kristoffer Lundkvist, Björn Dahlbäck, Sara Linse, Tommy Cedervall
The protein corona formed around nanoparticles in protein-rich fluids plays an important role for nanoparticle biocompatibility, as found in several studies during the last decade. Biological fluids have complex compositions and the molecular components interact and function together in intricate networks. Therefore, the process to isolate blood or the preparation of blood derivatives may lead to differences in the composition of the identified protein corona around nanoparticles. Here, we show distinct differences in the protein corona formed in whole blood, whole blood with EDTA, plasma, or serum...
2017: PloS One
https://www.readbyqxmd.com/read/28414769/creation-of-an-intramedullary-cavity-by-hemorrhagic-necrosis-removal-24-h-after-spinal-cord-contusion-in-rats-for-eventual-intralesional-implantation-of-restorative-materials
#16
Gabriel Guizar-Sahagun, Angelina Martinez-Cruz, Rebecca E Franco-Bourland, Eduardo Cruz-García, Alvaro Corona-Juarez, Araceli Diaz-Ruiz, Israel Grijalva, Horacio J Reyes-Alva, Ignacio Madrazo
Intramedullary hemorrhagic necrosis occurs early after spinal cord injury at the site of injury and adjacent segments. It is considered harmful because of its potential to aggravate secondary injury, and to interfere with axonal regeneration; it might also lead to an unfavorable environment for intralesional implants. Removal of hemorrhagic necrosis has been attempted before with variable results. The invasive nature of these procedures carries the risk of exacerbating damage to the injured cord. The overall objective for this study was to test several strategies for non-damaging removal of hemorrhagic necrosis and characterize the resulting cavity looking for a space for future intralesional therapeutic implants in rats with acute cord injury...
2017: PloS One
https://www.readbyqxmd.com/read/28412941/survival-prediction-in-amyotrophic-lateral-sclerosis-based-on-mri-measures-and-clinical-characteristics
#17
Christina Schuster, Orla Hardiman, Peter Bede
BACKGROUND: Amyotrophic lateral sclerosis (ALS) a highly heterogeneous neurodegenerative condition. Accurate diagnostic, monitoring and prognostic biomarkers are urgently needed both for individualised patient care and clinical trials. A multimodal magnetic resonance imaging study is presented, where MRI measures of ALS-associated brain regions are utilised to predict 18-month survival. METHODS: A total of 60 ALS patients and 69 healthy controls were included in this study...
April 17, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28412819/d-%C3%AE-tocopheryl-polyethylene-glycol-succinate-micelles-structure-kinetic-pathways-and-modulation-by-cyclodextrins
#18
Joan Puig-Rigall, Isabelle Grillo, Cecile A Dreiss, Gustavo González-Gaitano
The aggregation and structure of D-α-tocopheryl polyethylene glycol succinate micelles, TPGS-1000, an amphiphilic derivative of vitamin E, were characterized by scattering and spectroscopic methods, and the impact of different cyclodextrins (CDs) on the self-assembly studied, with the view of combining these two versatile pharmaceutical excipients in drug formulations. Combined SANS, DLS, time-resolved and steady-state fluorescence emission experiments revealed a core-shell architecture with a high aggregation number (Nagg ~ 100) and a highly hydrated PEO corona (~ 11 molecules of solvent per EO unit)...
April 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28410515/folate-receptor-targeted-hybrid-lipid-core-nanocapsules-for-sequential-delivery-of-doxorubicin-and-tanespimycin
#19
Biki Gupta, Shiva Pathak, Bijay Kumar Poudel, Shobha Regmi, Hima Bindu Ruttala, Milan Gautam, Jong Seong Lee, Jee-Heon Jeong, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
When exposed to cancer cells, cytotoxic drugs such as doxorubicin (DOX) can lead to the induction of heat shock protein 90 (Hsp90), a molecular chaperone associated with a number of cancer-related client proteins, and result in cell survival. Co-administration of DOX with tanespimycin (TNP), an Hsp90 inhibitor, can sensitize the cancer cells to the cytotoxic effects of DOX. The effect of such a combination has been found to depend on the schedule of administration. Sequential administration of DOX and TNP has been linked to highly synergistic combination effects...
April 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28408440/global-cardiovascular-and-renal-outcomes-of-reduced-gfr
#20
Bernadette Thomas, Kunihiro Matsushita, Kalkidan Hassen Abate, Ziyad Al-Aly, Johan Ärnlöv, Kei Asayama, Robert Atkins, Alaa Badawi, Shoshana H Ballew, Amitava Banerjee, Lars Barregård, Elizabeth Barrett-Connor, Sanjay Basu, Aminu K Bello, Isabela Bensenor, Jaclyn Bergstrom, Boris Bikbov, Christopher Blosser, Hermann Brenner, Juan-Jesus Carrero, Steve Chadban, Massimo Cirillo, Monica Cortinovis, Karen Courville, Lalit Dandona, Rakhi Dandona, Kara Estep, João Fernandes, Florian Fischer, Caroline Fox, Ron T Gansevoort, Philimon N Gona, Orlando M Gutierrez, Samer Hamidi, Sarah Wulf Hanson, Jonathan Himmelfarb, Simerjot K Jassal, Sun Ha Jee, Vivekanand Jha, Aida Jimenez-Corona, Jost B Jonas, Andre Pascal Kengne, Yousef Khader, Young-Ho Khang, Yun Jin Kim, Barbara Klein, Ronald Klein, Yoshihiro Kokubo, Dhaval Kolte, Kristine Lee, Andrew S Levey, Yongmei Li, Paulo Lotufo, Hassan Magdy Abd El Razek, Walter Mendoza, Hirohito Metoki, Yejin Mok, Isao Muraki, Paul M Muntner, Hiroyuki Noda, Takayoshi Ohkubo, Alberto Ortiz, Norberto Perico, Kevan Polkinghorne, Rajaa Al-Radaddi, Giuseppe Remuzzi, Gregory Roth, Dietrich Rothenbacher, Michihiro Satoh, Kai-Uwe Saum, Monika Sawhney, Ben Schöttker, Anoop Shankar, Michael Shlipak, Diego Augusto Santos Silva, Hideaki Toyoshima, Kingsley Ukwaja, Mitsumasa Umesawa, Stein Emil Vollset, David G Warnock, Andrea Werdecker, Kazumasa Yamagishi, Yuichiro Yano, Naohiro Yonemoto, Maysaa El Sayed Zaki, Mohsen Naghavi, Mohammad H Forouzanfar, Christopher J L Murray, Josef Coresh, Theo Vos
The burden of premature death and health loss from ESRD is well described. Less is known regarding the burden of cardiovascular disease attributable to reduced GFR. We estimated the prevalence of reduced GFR categories 3, 4, and 5 (not on RRT) for 188 countries at six time points from 1990 to 2013. Relative risks of cardiovascular outcomes by three categories of reduced GFR were calculated by pooled random effects meta-analysis. Results are presented as deaths for outcomes of cardiovascular disease and ESRD and as disability-adjusted life years for outcomes of cardiovascular disease, GFR categories 3, 4, and 5, and ESRD...
April 13, 2017: Journal of the American Society of Nephrology: JASN
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