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https://www.readbyqxmd.com/read/28819250/oblique-scanning-laser-microscopy-for-simultaneously-volumetric-structural-and-molecular-imaging-using-only-one-raster-scan
#1
Lei Zhang, Amalia Capilla, Weiye Song, Gustavo Mostoslavsky, Ji Yi
Multi-modal three dimensional (3D) optical imaging combining both structural sensitivity and molecular specificity is highly desirable in biomedical research. In this paper, we present a method termed oblique scanning laser microscopy (OSLM) to combine optical coherence tomography (OCT), for simultaneously volumetric structural and molecular imaging with cellular resolution in all three dimensions. Conventional 3D laser scanning fluorescence microscopy requires repeated optical sectioning to create z-stacks in depth...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28803915/neural-crest-cell-implantation-restores-enteric-nervous-system-function-and-alters-the-gastrointestinal-transcriptome-in-human-tissue-engineered-small-intestine
#2
Christopher R Schlieve, Kathryn L Fowler, Matthew Thornton, Sha Huang, Ibrahim Hajjali, Xiaogang Hou, Brendan Grubbs, Jason R Spence, Tracy C Grikscheit
Acquired or congenital disruption in enteric nervous system (ENS) development or function can lead to significant mechanical dysmotility. ENS restoration through cellular transplantation may provide a cure for enteric neuropathies. We have previously generated human pluripotent stem cell (hPSC)-derived tissue-engineered small intestine (TESI) from human intestinal organoids (HIOs). However, HIO-TESI fails to develop an ENS. The purpose of our study is to restore ENS components derived exclusively from hPSCs in HIO-TESI...
August 9, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28735893/mechanistic-and-kinetic-study-on-the-reaction-of-methylperoxy-radical-with-atomic-iodine
#3
Yunju Zhang, Ruojing Song, Yuxi Sun, Jingyu Sun, Rongshun Wang
Singlet and triplet potential energy surfaces for the CH3O2 with I reaction have been investigated computationally to propose the reaction mechanisms and possible products. Multichannel RRKM theory and transition-state theory have been used to compute the overall and individual rate constants at 200-3000K and 10(-14)-10(14)Torr. On the singlet PES, addition-elimination, substitution and H-abstraction mechanisms are located, and the addition-elimination mechanism is dominant. At 70Torr with N2 as bath gas, IM1(CH3OOI) formed by collisional stabilization is dominated at 200-300K, whereas CH2O and HIO are the major products at the temperatures between 350 and 3000K; The title reaction exhibits the typical falloff behavior...
May 5, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28601313/a-propensity-score-analysis-of-two-methods-of%C3%A2-hepatic-vascular-occlusion-in-hepatectomy
#4
Xin Luo, Lin Chen, Wenhua Liu, Shuilin Dong, Hongping Luo, Bixiang Zhang, Xiaoping Chen
BACKGROUND: The key points in hepatectomy are reducing blood loss and preservation of hepatic function. The aim of this study was to compare the perioperative outcomes of partial hepatectomy using two techniques of hepatic vascular inflow occlusion. MATERIALS AND METHODS: A total of 1817 patients were selected from our multi-institutional hepatectomy database in China and classified into two groups: the hemihepatic inflow occlusion (HIO) group (n = 1693) and the ipsilateral portal vein branch occlusion (IPVBO) group (n = 124)...
June 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28595162/rotator-cuff-tendinopathy-alters-the-muscle-activity-onset-and-kinematics-of-scapula
#5
Hio Teng Leong, Gabriel Yin-Fat Ng, Shing Chung Chan, Siu Ngor Fu
Athletes with rotator cuff (RC) tendinopathy demonstrate an aberrant pattern of scapular motion which might relate to deficits in the scapular muscles. This study aimed to determine whether alteration in scapular kinematics is associated with deficits in the activity onset of scapular muscles. Forty-three male volleyball players (17 asymptomatic and 26 with RC tendinopathy) joined the study. Three-dimensional scapular kinematics was quantified using an acromial marker cluster method. The activity onset of the upper (UT), middle (MT), and lower trapezius (LT), and serratus anterior (SA) during arm abduction was assessed with electromyography...
August 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28483679/sensitive-and-non-invasive-assessment-of-hepatocellular-iron-using-a-novel-room-temperature-susceptometer
#6
Johannes Mueller, Hanna Raisi, Vanessa Rausch, Teresa Peccerella, David Simons, Christian Herbert Ziener, Heinz-Peter Schlemmer, Helmut Karl Seitz, Nina Waldburger, Thomas Longerich, Beate Katharina Straub, Sebastian Mueller
BACKGROUND & AIMS: Liver iron accumulates in various chronic liver diseases where it is an independent factor for survival and carcinogenesis. We tested a novel room-temperature susceptometer (RTS) to non-invasively assess liver iron concentration (LIC). METHODS: Two hundred and sixty-four patients with or without signs of iron overload or liver disease were prospectively enrolled. Thirty-five patients underwent liver biopsy with semiquantitative iron determination (Prussian Blue staining), atomic absorption spectroscopy (AAS, n=33), or magnetic resonance imaging (MRI, n=15)...
May 5, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28361322/in-vivo-model-of-small-intestine
#7
Maxime M Mahe, Nicole E Brown, Holly M Poling, Michael A Helmrath
The utilization of human pluripotent stem cells (hPSCs) offers new avenues in the generation of organs and opportunities to understand development and diseases. The hPSC-derived human intestinal organoids (HIOs) provide a new tool to gain insights in small intestinal development, physiology, and associated diseases. Herein, we provide a method for orthotropic transplantation of HIOs in immunocompromised mice. This method highlights the specific steps to successful engraftment and provides insight into the study of bioengineered human small intestine...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28361317/generation-of-gastrointestinal-organoids-from-human-pluripotent-stem-cells
#8
Jorge O Múnera, James M Wells
Over the past several decades, developmental biologists have discovered fundamental mechanisms by which organs form in developing embryos. With this information it is now possible to generate human "organoids" by the stepwise differentiation of human pluripotent stem cells using a process that recapitulates organ development. For the gastrointestinal tract, one of the first key steps is the formation of definitive endoderm and mesoderm, a process that relies on the TGFb molecule Nodal. Endoderm is then patterned along the anterior-posterior axis, with anterior endoderm forming the foregut and posterior endoderm forming the mid and hindgut...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28270248/the-resuscitative-and-pharmacokinetic-effects-of-humeral-intraosseous-vasopressin-in-a-swine-model-of-ventricular-fibrillation
#9
James M Burgert, Arthur D Johnson, Jose Garcia-Blanco, Lawrence V Fulton, Michael J Loughren
Introduction The American Heart Association (AHA; Dallas, Texas USA) and European Resuscitation Council (Niel, Belgium) cardiac arrest (CA) guidelines recommend the intraosseous (IO) route when intravenous (IV) access cannot be obtained. Vasopressin has been used as an alternative to epinephrine to treat ventricular fibrillation (VF). Hypothesis/Problem Limited data exist on the pharmacokinetics and resuscitative effects of vasopressin administered by the humeral IO (HIO) route for treatment of VF. The purpose of this study was to evaluate the effects of HIO and IV vasopressin, on the occurrence, odds, and time of return of spontaneous circulation (ROSC) and pharmacokinetic measures in a swine model of VF...
March 8, 2017: Prehospital and Disaster Medicine
https://www.readbyqxmd.com/read/28252109/gamma-band-activities-in-mouse-frontal-and-visual-cortex-induced-by-coherent-dot-motion
#10
Hio-Been Han, Eunjin Hwang, Soohyun Lee, Min-Shik Kim, Jee Hyun Choi
A key question within systems neuroscience is to understand how the brain encodes spatially and temporally distributed local features and binds these together into one perceptual representation. Previous works in animal and human have shown that changes in neural synchrony occur during the perceptual processing and these changes are distinguished by the emergence of gamma-band oscillations (GBO, 30-80 Hz, centered at 40 Hz). Here, we used the mouse electroencephalogram to investigate how different cortical areas play roles in perceptual processing by assessing their GBO patterns during the visual presentation of coherently/incoherently moving random-dot kinematogram and static dots display...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28176514/comparison-of-hepatectomy-with-or-without-hepatic-inflow-occlusion-in-patients-with-hepatocellular-carcinoma-a-single-center-experience
#11
Jing H Jiang, Kai X Wang, Ji Y Zhu, Pei P Yang, Zhe Guo, Song L Ma, Yang Lv, Bang D Xiang, Jian H Zhong, Le Q Li
BACKGROUND: The negative effects of hepatic inflow occlusion (HIO) on postoperative liver function of patients with hepatocellular carcinoma (HCC) after liver resection have been reported. Nevertheless, whether HIO could influence the long-term outcomes remains unclear. METHODS: A total of 396 patients were included in this study and divided into without occlusion (WO) group (n=112) and HIO group (n=284). Aiming to minimize influence of selection bias and confounding variables, we used propensity score matching (PSM) of a 0...
February 7, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28140441/effects-of-humerus-intraosseous-versus-intravenous-amiodarone-administration-in-a-hypovolemic-porcine-model
#12
Cpt Monica M Holloway, Cpt Shannan L Jurina, Cpt Joshua D Orszag, Lt George R Bragdon, Lt Rustin D Green, Jose C Garcia-Blanco, Brian E Benham, Ltc Timothy S Adams, Don Johnson
OBJECTIVE: To compare the effects of amiodarone administration by humerus intraosseous (HIO) and intravenous (IV) routes on return of spontaneous circulation (ROSC), time to maximum concentration (Tmax), maximum plasma drug concentration (Cmax), time to ROSC, and mean concentrations over time in a hypovolemic cardiac arrest model. DESIGN: Prospective, between subjects, randomized experimental design. SETTING: TriService Research Facility. SUBJECTS: Yorkshire-cross swine (n = 28)...
2016: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28140439/effects-of-tibial-and-humerus-intraosseous-administration-of-epinephrine-in-a-cardiac-arrest-swine-model
#13
Ltc Denise Beaumont, Asal Baragchizadeh, Charles Johnson, Don Johnson
OBJECTIVE: Compare maximum concentration (Cmax), time to maximum concentration (Tmax), mean serum concentration of epinephrine, return of spontaneous circulation (ROSC), time to ROSC, and odds of survival relative to epinephrine administration by humerus intraosseous (HIO), tibial intraosseous (TIO), and intravenous (IV) routes in a swine cardiac arrest model. DESIGN: Prospective, between subjects, randomized experimental design. SETTING: TriService Research Facility...
2016: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28140438/the-comparison-of-humeral-intraosseous-and-intravenous-administration-of-vasopressin-on-return-of-spontaneous-circulation-and-pharmacokinetics-in-a-hypovolemic-cardiac-arrest-swine-model
#14
COMPARATIVE STUDY
Mark H Wimmer, Kenneth Heffner, Michael Smithers, Richard Culley, Jennifer Coyner, Michael Loughren, Don Johnson
INTRODUCTION: The American Heart Association (AHA) recommends intravenous (IV) or intraosseous (IO) vasopressin in Advanced Cardiac Life Support (ACLS). Obtaining IV access in hypovolemic cardiac arrest patients can be difficult, and IO access is often obtained in these life threatening situations. No studies have been conducted to determine the effects of humeral IO (HIO) access with vasopressin in the return of spontaneous circulation (ROSC). Our study compared the kinetics of vasopressin and ROSC with HIO with IV access in the hypovolemic swine model...
2016: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28129955/-primary-infection-with-cytomegalovirus-an-infectious-cause-of-splenic-infarction
#15
H Kassem, K Khamadi, C Farrugia, N Ho Hio Hen, T El Gharbi, L Turner
INTRODUCTION: Cytomegalovirus-associated thrombosis has been extensively reported in the medical literature, mainly in immune-compromised patients. However, the association with splenic infarcts has rarely been reported. CASE REPORT: We report a 32-year-old Caucasian and immunocompetent woman who presented with a splenic infarction during a primary infection with CMV. The differential diagnostic ruled out embolic, hematologic, gastrointestinal and coagulation disorders...
January 24, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28067029/5-5-diazaisoindigo-an-electron-deficient-building-block-for-donor-acceptor-conjugated-polymers
#16
Yang Lu, Yi Liu, Ya-Zhong Dai, Chi-Yuan Yang, Hio-Ieng Un, Si-Wei Liu, Ke Shi, Jie-Yu Wang, Jian Pei
A novel electron-deficient building block, 5,5'-diazaisoindigo (5DNIID), was synthesized through a facile method in good yield. As a derivative of isoindigo, 5DNIID shows an ultra-low LUMO level of -3.92 eV after incorporation of two electron-deficient nitrogen atoms into the para-position of the amine groups in the isoindigo π skeleton. Modified polymerization conditions were applied to efficiently afford the donor-acceptor (D-A) conjugated polymer 5DNIID-2T, which exhibited a p-type charge transport property...
January 9, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/27869805/engineered-human-pluripotent-stem-cell-derived-intestinal-tissues-with-a-functional-enteric-nervous-system
#17
Michael J Workman, Maxime M Mahe, Stephen Trisno, Holly M Poling, Carey L Watson, Nambirajan Sundaram, Ching-Fang Chang, Jacqueline Schiesser, Philippe Aubert, Edouard G Stanley, Andrew G Elefanty, Yuichiro Miyaoka, Mohammad A Mandegar, Bruce R Conklin, Michel Neunlist, Samantha A Brugmann, Michael A Helmrath, James M Wells
The enteric nervous system (ENS) of the gastrointestinal tract controls many diverse functions, including motility and epithelial permeability. Perturbations in ENS development or function are common, yet there is no human model for studying ENS-intestinal biology and disease. We used a tissue-engineering approach with embryonic and induced pluripotent stem cells (PSCs) to generate human intestinal tissue containing a functional ENS. We recapitulated normal intestinal ENS development by combining human-PSC-derived neural crest cells (NCCs) and developing human intestinal organoids (HIOs)...
January 2017: Nature Medicine
https://www.readbyqxmd.com/read/27805541/inulin-oligofructose-attenuates-metabolic-syndrome-in-high-carbohydrate-high-fat-diet-fed-rats
#18
Senthil A Kumar, Leigh C Ward, Lindsay Brown
Prebiotics alter bacterial content in the colon, and therefore could be useful for obesity management. We investigated the changes following addition of inulin oligofructose (IO) in the food of rats fed either a corn starch (C) diet or a high-carbohydrate, high-fat (H) diet as a model of diet-induced metabolic syndrome. IO did not affect food intake, but reduced body weight gain by 5·3 and 12·3 % in corn starch+inulin oligofructose (CIO) and high-carbohydrate, high-fat with inulin oligofructose (HIO) rats, respectively...
November 2016: British Journal of Nutrition
https://www.readbyqxmd.com/read/27677402/faim2-as-a-novel-diagnostic-maker-and-a-potential-therapeutic-target-for-small-cell-lung-cancer-and-atypical-carcinoid
#19
Hio Chung Kang, Jong In Kim, Hee Kyung Chang, Gavitt Woodard, Young Sik Choi, Ja-Lok Ku, David M Jablons, Il-Jin Kim
Lung neuroendocrine (NE) tumors are a heterogeneous group of tumors arising from neuroendocrine cells that includes typical carcinoid, atypical carcinoid, small cell lung cancer (SCLC), and large cell NE cancer. The subtyping of NE tumors is based on the number of mitoses per high powered field and the presences of necrosis. However, the best diagnostic criteria to differentiate various subtypes of lung NE tumors remains controversial and few diagnostic markers distinguish typical and atypical carcinoid. In this study, we show that FAIM2, an inhibitory molecule in the Fas-apoptosis pathway, is significantly overexpressed in SCLC compared to non-small cell lung cancer...
September 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27660075/hnf-4alpha-negatively-regulates-hepcidin-expression-through-bmpr1a-in-hepg2-cells
#20
Wencai Shi, Heyang Wang, Xuan Zheng, Xin Jiang, Zheng Xu, Hui Shen, Min Li
Hepcidin synthesis is reported to be inadequate according to the body iron store in patients with non-alcoholic fatty liver disease (NAFLD) undergoing hepatic iron overload (HIO). However, the underlying mechanisms remain unclear. We hypothesize that hepatocyte nuclear factor-4α (HNF-4α) may negatively regulate hepcidin expression and contribute to hepcidin deficiency in NAFLD patients. The effect of HNF-4α on hepcidin expression was observed by transfecting specific HNF-4α small interfering RNA (siRNA) or plasmids into HepG2 cells...
April 2017: Biological Trace Element Research
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