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https://www.readbyqxmd.com/read/28742954/carbon-dioxide-elimination-by-cardiomyocytes-a-tale-of-high-carbonic-anhydrase-activity-and-membrane-permeability
#1
EDITORIAL
Erik R Swenson
Life as a multicellular organism requires a heart with a coordinated contractile activity that must never cease, and in this regard, it is very much like the brain with a high mass-specific 'resting' metabolic rate. To maintain this constant activity requires a high rate of oxygen consumption and resultant carbon dioxide generation and, pari passu, the rapid exchange of large amounts of these gases with capillary blood. While oxygen has been far more the focus of the two gases in cardiac physiology, the work of Arias-Hidalgo et al (1) in this issue of the journal offers new insights and better understanding of how CO2 uniquely traverses its path from production in the mitochondria to the capillary blood, and does so with much smaller driving gradients than necessary for oxygen...
July 25, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28742636/the-influence-of-chloride-for-the-interpretation-of-plasma-bicarbonate-during-the-treatment-of-diabetic-ketoacidosis
#2
Juan Pablo Ferreira, Magali Hamui, Milagros Torrents, Romina Carrano, Mabel Ferraro, Ismael Toledo
INTRODUCTION: Hyperchloremic metabolic acidosis can occur in diabetic ketoacidosis (DKA) and may affect the acid-base interpretation during treatment. OBJECTIVES: This study aims to describe the prevalence of hyperchloremia during the treatment of DKA and its effect on the interpretation of bicarbonate value. METHODS: A cross-sectional study, including all cases of DKA in patients aged 1 to 18 years old admitted from 2010 to 2015, was performed...
July 24, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28741429/rapid-systemic-delivery-of-zolmitriptan-using-an-adhesive-dermally-applied-microarray
#3
Donald J Kellerman, Mahmoud Ameri, Stewart J Tepper
Adhesive Dermally-Applied Microarray (ADAM) is a device for intracutaneous drug administration consisting of a 3 cm(2) disposable array of drug-coated titanium microprojections on an adhesive backing. It is applied using a low cost, reusable, handheld applicator. Microprojections penetrate the stratum corneum, delivering drug proximal to capillaries with limited likelihood of pain. The pharmacokinetics of zolmitriptan delivery using ADAM was evaluated in 20 healthy volunteers. Median tmax was <20 min, comparable to subcutaneous sumatriptan...
July 25, 2017: Pain Management
https://www.readbyqxmd.com/read/28741167/microvascular-ultrastructural-changes-precede-cognitive-impairment-in-the-murine-appswe-ps1de9-model-of-alzheimer-s-disease
#4
Patricia Kelly, Paul Denver, Simon C Satchell, Maximilian Ackermann, Moritz A Konerding, Christopher A Mitchell
Cerebral and systemic organ microvascular pathologies coexist with human Alzheimer's disease (AD) neuropathology. In this study, we hypothesised that both cerebral and systemic microvascular pathologies exist in 4- to 5-month-old male APPswe/PS1dE9 (APP/PS1) transgenic mice prior to the onset of cognitive impairment. To assess this we examined recognition memory in both wild-type and APP/PS1 mice using the object recognition task (ORT; n = 11 per group) and counted thioflavin-S-positive plaques in brain (n = 6 per group)...
July 25, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28740980/micro-engineered-perfusable-3d-vasculatures-for-cardiovascular-diseases
#5
Nishanth Venugopal Menon, Hui Min Tay, Soon Nan Wee, King Ho Holden Li, Han Wei Hou
Vessel geometries in microengineered in vitro vascular models are important to recapitulate a pathophysiological microenvironment for the study of flow-induced endothelial dysfunction and inflammation in cardiovascular diseases. Herein, we present a simple and novel extracellular matrix (ECM) hydrogel patterning method to create perfusable vascularized microchannels of different geometries based on the concept of capillary burst valve (CBV). No surface modification is necessary and the method is suitable for different ECM types including collagen, matrigel and fibrin...
July 25, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28739514/inhibition-of-blood-brain-barrier-efflux-transporters-promotes-seizure-in-pregnant-rats-role-of-circulating-factors
#6
Abbie C Johnson, Erica S Hammer, Sophie Sakkaki, Sarah M Tremble, Gregory L Holmes, Marilyn J Cipolla
Seizure-provoking factors circulate late in gestation during normal pregnancy, but do not readily gain access to the brain due to the protective nature of the blood-brain barrier. In particular, efflux transporters are powerful ATP-driven pumps that actively prevent unwanted compounds from entering the brain. We hypothesized that acute inhibition of efflux transporters at the blood-brain barrier would result in spontaneous seizures in pregnant rats. We further hypothesized that the blood-brain barrier protects the maternal brain from seizure by increasing expression and/or activity of p-glycoprotein (P-gp), a major efflux transporter...
July 21, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28739448/hydrocortisone-and-ascorbic-acid-synergistically-prevent-and-repair-lps-induced-pulmonary-endothelial-barrier-dysfunction
#7
Nektarios Barabutis, Vikramjit Khangoora, Paul E Marik, John D Catravas
BACKGROUND: Sepsis refers the dysregulated host immune response elicited by microbial infections resulting in life-threatening organ dysfunction. Sepsis represents a medical challenge, since it is associated with a rate of death as high as 60%. Septic shock is strongly associated with vascular dysfunction and elevated pulmonary capillary permeability. We recently reported that the combination of hydrocortisone (HC), ascorbic acid (VitC) and thiamine dramatically improves outcomes and reduces mortality in septic patients...
July 21, 2017: Chest
https://www.readbyqxmd.com/read/28739166/characterizing-activation-mechanisms-and-binding-preferences-of-ruthenium-metallo-prodrugs-by-a-competitive-binding-assay
#8
Christian Artner, Hannah U Holtkamp, Christian G Hartinger, Samuel M Meier-Menches
The activation mechanisms and reactivity of ruthenium metallo-prodrug lead structures were investigated in detail using capillary zone electrophoresis mass spectrometry (CZE-MS) in a time-dependent manner and by exposing to a protein/oligonucleotide mixture. The competitive assays were performed with sodium trans-[RuCl4(HInd)2] where Hind=indazole (NKP-1339), [(η(6)-p-cymene)RuCl2(pta)], where pta=1,3,5-triaza-7-phosphaadamantane (RAPTA-C) and [(η(6)-biphenyl)RuCl(1,2-ethylenediamine)]PF6 (RM175). Molecular and quantitative information on binding preferences was obtained by coupling CZE to electrospray ionization MS (ESI-MS) and inductively coupled plasma MS (ICP-MS), respectively...
July 16, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28738880/level-of-mitoses-in-non-muscle-invasive-papillary-urothelial-carcinomas-pta-and-pt1-at-initial-bladder-biopsy-is-a-simple-and-powerful-predictor-of-clinical-outcome-a-multi-center-study-in-south-korea
#9
Ji Eun Kwon, Nam Hoon Cho, Yeong-Jin Choi, So Dug Lim, Yong Mee Cho, Sun Young Jun, Sanghui Park, Young A Kim, Sung-Sun Kim, Mi Sun Choe, Jung-Dong Lee, Dae Yong Kang, Jae Y Ro, Hyun-Jung Kim
BACKGROUND: Histologic grade is the most important predictor of the clinical outcome of non-muscle invasive (Ta, T1) papillary urothelial carcinoma (NMIPUCa), but its ambiguous criteria diminish its power to predict recurrence/progression for individual patients. We attempted to find an objective and reproducible histologic predictor of NMIPUCa that correlates well with the clinical outcome. METHODS: A total of 296 PUCas were collected from the Departments of Surgical Pathology of 11 institutions in South Korea...
July 24, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28738734/a-tissue-factor-cascade-targeted-nanoparticle-forsite-directed-inducing-thrombosis
#10
Weiwei Jin, Yanxue Yin, Bo Zhang, Heng Mei, Huafang Wang, Tao Guo, Wei Shi, Yu Hu
Tissue factor is an upstream component of the cascade and a high-expressing factor under phathological conditions. In this study, a tissue factor cascade-targeted strategy for inducing local thrombosis was developed by combining ENP-HMME and photochemistry. In vitro study showed that protein EGFP-EGF1 conjugation to the nanoparticles could significantly contribute to the uptake of nanoparticles by tissue factor over-expressed brain capillary endothelial cells. Three-dimensional imaging and specklegram of brains in vivo showed that tissue factor cascade-targeted strategy successfully induced thrombosis of expected position...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28738664/bomb-swab-can-trace-explosive-particle-sampling-and-detection-be-improved
#11
Danny Fisher, Raya Zach, Yossef Matana, Paz Elia, Shiran Shustack, Yarden Sharon, Yehuda Zeiri
The marked increase in international terror in recent years requires the development of highly efficient methods to detect trace amounts of explosives at airports, border crossings and check points. The preferred analytical method worldwide is the ion mobility spectrometry (IMS) that is capable of detecting most explosives at the nano-gram level. Sample collection for the IMS analysis is based on swabbing of a passenger's belongings to collect possible explosive residues. The present study examines a wide range of issues related to swab-based particle collection and analysis, in the hope of gaining deeper understanding into this technique that will serve to improve the detection process...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738231/sliding-strip-microfluidic-device-enables-elisa-on-paper
#12
Mohit S Verma, Maria-Nefeli Tsaloglou, Tyler Sisley, Dionysios Christodouleas, Austin Chen, Jonathan Milette, George M Whitesides
This article describes a 3D microfluidic paper-based analytical device that can be used to conduct an enzyme-linked immunosorbent assay (ELISA). The device comprises two parts: a sliding strip (which contains the active sensing area) and a structure surrounding the sliding strip (which holds stored reagents-buffers, antibodies, and enzymatic substrate-and distributes fluid). Running an ELISA involves adding sample (e.g. blood) and water, moving the sliding strip at scheduled times, and analyzing the resulting color in the sensing area visually or using a flatbed scanner...
July 19, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28738134/indocyanine-green-angiography-and-optical-coherence-tomography-angiography-of-choroidal-neovascularization-in-age-related-macular-degeneration
#13
Chiara M Eandi, Antonio Ciardella, Mariacristina Parravano, Filippo Missiroli, Camilla Alovisi, Chiara Veronese, Maria C Morara, Massimo Grossi, Gianni Virgili, Federico Ricci
Purpose: To compare the capability of indocyanine green angiography (ICGA) and optical coherence tomography angiography (OCTA) in detecting choroidal neovascularization (CNV). Methods: In this prospective study, patients with CNV detected with fluorescein angiography (FA) underwent ICGA and OCTA, spectral domain OCT (SD-OCT), and infrared or fundus color photographs. CNV lesions were outlined on ICGA and OCTA images, and the composition and size of the CNV was documented...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28738087/exercise-physiology-with-a-left-ventricular-assist-device-analysis-of-heart-pump-interaction-with-a-computational-simulator
#14
Libera Fresiello, Frank Rademakers, Piet Claus, Gianfranco Ferrari, Arianna Di Molfetta, Bart Meyns
Patients with a Ventricular Assist Device (VAD) are hemodynamically stable but show an impaired exercise capacity. Aim of this work is to identify and to describe the limiting factors of exercise physiology with a VAD. We searched for data concerning exercise in heart failure condition and after VAD implantation from the literature. Data were analyzed by using a cardiorespiratory simulator that worked as a collector of inputs coming from different papers. As a preliminary step the simulator was used to reproduce the evolution of hemodynamics from rest to peak exercise (ergometer cycling) in heart failure condition...
2017: PloS One
https://www.readbyqxmd.com/read/28737534/considerations-in-the-understanding-of-venous-outflow-in-the-retinal-capillary-plexus
#15
Sean T Garrity, Michel Paques, Alain Gaudric, K Bailey Freund, David Sarraf
No abstract text is available yet for this article.
July 20, 2017: Retina
https://www.readbyqxmd.com/read/28737464/acute-glycemic-and-pressure-responses-of-continuous-and-interval-aerobic-exercise-in-patients-with-type-2-diabetes
#16
Éder Santiago, Rodrigo Sudatti Delevatti, Cláudia Gomes Bracht, Nathalie Netto, Salime Chedid Lisboa, Alexandra Ferreira Vieira, Rochelle Rocha Costa, Alexandra Hübner, Marco Antônio Fossati, Luiz Fernando Martins Kruel
BACKGROUND: Aerobic training has been widely indicated to patients with type 2 diabetes. However, there are still few studies comparing acute glycemic and blood pressure effects of different methods of aerobic training. The aim is to compare glycemic and pressure acute responses of continuous aerobic exercise to interval aerobic exercise in patients with type 2 diabetes. MATERIALS AND METHODS: This study is a randomized, crossover clinical trial. Fourteen patients with type 2 diabetes performed two sessions of aerobic training with different methods (continuous and interval)...
July 24, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28737202/-euglycemic-ketosis-in-an-adolescent-with-type-1-diabetes-on-insulin-and-dapaglifozin-case-report
#17
Marcia Pereyra A, Cristhian Ramírez, Rossana Román
Dapagliflozin, an insulin-independent sodium-glucose cotransporter 2 inhibitor (SGLT2-I) induces glycosuria and reduces hyperglycemia in adults with type 2 diabetes. OBJECTIVE: To present an “euglycemic” diabetic ketosis in an adolescent with type 1 diabetes (T1D) receiving dapagliflozin, to alert about the risk of a drug not approved in children nor in T1D. CASE REPORT: A 17 years old adolescent with T1D during 9 years, was started on dapagliflozin 10 mg / day to reduce insulin dose and weight...
June 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28736359/-small-intestinal-cavernous-hemangioma-causing-chronic-hemorrhage-a-case-report
#18
Geng-Yuan Zhang, Chang-Jiang Luo, Bin Zhao, Hao Zhan, Bo Long, Ling-Yun Guo, Hui-Nian Zhou, Zuo-Yi Jiao
Small intestinal hemangioma is a rare condition that can be divided histologically into capillary, cavernous or mixed types, among which the cavernous type is the most common. Here we report a case of small intestinal cavernous hemangioma with chronic hemorrhage in 44-year-old man. The patient complained of weakness and dizziness for 2 years that aggravated 1 month before admission accompanied by intermittent melena. Laboratory tests suggest severe anemia, and computed tomography, gastroscopy and colonoscopy all revealed signs of anemia...
July 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28736024/effects-of-sildenafil-and-tadalafil-on-edema-and-reactive-oxygen-species-production-in-an-experimental-model-of-lung-ischemia-reperfusion-injury
#19
J R Guerra-Mora, E Perales-Caldera, D Aguilar-León, C Nava-Sanchez, A Díaz-Cruz, N E Díaz-Martínez, P Santillán-Doherty, G Torres-Villalobos, C C Bravo-Reyna
BACKGROUND: Lung ischemia-reperfusion injury is characterized by formation of reactive oxygen species and cellular swelling leading to pulmonary edema and primary graft dysfunction. Phosphodiesterase 5 inhibitors could ameliorate lung ischemia-reperfusion injury by interfering in many molecular pathways. The aim of this work was to evaluate and compare the effects of sildenafil and tadalafil on edema and reactive oxygen species formation in an ex vivo nonhuman animal model of lung ischemia-reperfusion injury...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28735885/surface-hydrodynamics-of-viscoelastic-fluids-and-soft-solids-surfing-bulk-rheology-on-capillary-and-rayleigh-waves
#20
REVIEW
Francisco Monroy
From the recent advent of the new soft-micro technologies, the hydrodynamic theory of surface modes propagating on viscoelastic bodies has reinvigorated this field of technology with interesting predictions and new possible applications, so recovering its scientific interest very limited at birth to the academic scope. Today, a myriad of soft small objects, deformable meso- and micro-structures, and macroscopically viscoelastic bodies fabricated from colloids and polymers are already available in the materials catalogue...
July 18, 2017: Advances in Colloid and Interface Science
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