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https://www.readbyqxmd.com/read/28921522/extraluminal-biodegradable-splint-to-treat-upper-airway-anterior-malacia-a-preclinical-proof-of-principle
#1
François Gorostidi, Cécile Courbon, Marco Burki, Antoine Reinhard, Kishore Sandu
OBJECTIVE: Upper airway malacia highly complicates the treatment of benign laryngotracheal stenosis, and no ideal option is available to date. We here explore the use of extraluminal biodegradable splints in an animal model of long-segment anterior tracheomalacia (TM). We show the efficacy, as well as the tissue tolerance, of a custom-made biodegradable extraluminal device surgically inserted around the trachea. STUDY DESIGN: Preclinical animal study. METHODS: Anterior TM was induced in rabbits through an anterior neck approach by removing eight consecutive anterior tracheal rings without damaging the underlying mucosa...
September 16, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28910075/mechanochemical-synthesis-of-pedot-pss-hydrogels-for-aqueous-formulation-of-li-ion-battery-electrodes
#2
Georgiana Sandu, Bruno Ernould, Julien Rolland, Nathalie Cheminet, Jeremy Brassinne, Pratik Das, Yaroslav Filinchuk, Luhua Cheng, Lidiya Komsiyska, Philippe Dubois, Sorin Melinte, Jean-François Gohy, Roberto Lazzaroni, Alexandru Vlad
Water-soluble binders can enable greener and cost effective Li-ion battery manufacturing by eliminating the standard fluorine-based formulations and associated organic solvents. The issue with water-based dispersions, however, remains the difficulty to stabilize them, requiring additional processing complexity. Herein, we show that mechanochemical conversion of a regular poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) water-based dispersion produces a hydrogel that meets all the requirements as binder for lithium-ion battery electrode manufacture...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28860128/opioid-receptor-activation-impairs-hypoglycemic-counterregulation-in-humans
#3
Michelle Carey, Rebekah Gospin, Akankasha Goyal, Nora Tomuta, Oana Sandu, Armand Mbanya, Eric Lontchi-Yimagou, Raphael Hulkower, Harry Shamoon, Ilan Gabriely, Meredith Hawkins
Although intensive glycemic control improves outcomes in type 1 diabetes mellitus, iatrogenic hypoglycemia limits its attainment. Recurrent and/or antecedent hypoglycemia causes blunting of protective counterregulatory responses, known as Hypoglycemia-Associated Autonomic Failure (HAAF). To determine whether and how opioid receptor activation induces HAAF in humans, twelve healthy, non-diabetic subjects (7M, age 32.3 ± 2.2 yr, BMI 25.1 ± 1.0 kg/m2) participated in two study protocols in random order over two consecutive days...
August 31, 2017: Diabetes
https://www.readbyqxmd.com/read/28829051/dopamine-transporter-and-reward-anticipation-in-a-dimensional-perspective-a-multimodal-brain-imaging-study
#4
Manon Dubol, Christian Trichard, Claire Leroy, Anca-Larisa Sandu, Mehdi Rahim, Bernard Granger, Eleni T Tzavara, Laurent Karila, Jean-Luc Martinot, Eric Artiges
Dopamine function and reward processing are highly interrelated and involve common brain regions afferent to the Nucleus Accumbens, within the mesolimbic pathway. While dopamine function and reward system neural activity are impaired in most psychiatric disorders, it is unknown if alterations in the dopamine system underlie variations in reward processing across a continuum encompassing health and these disorders. We explored the relationship between dopamine function and neural activity during reward anticipation in twenty-seven participants including healthy volunteers and psychiatric patients with schizophrenia, depression or cocaine addiction, using functional Magnetic Resonance Imaging (fMRI) and Positron Emission Tomography (PET) multimodal imaging with a voxel-based statistical approach...
August 22, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28792656/amygdala-and-regional-volumes-in-treatment-resistant-versus-nontreatment-resistant-depression-patients
#5
Anca-Larisa Sandu, Eric Artiges, André Galinowski, Thierry Gallarda, Frank Bellivier, Hervé Lemaitre, Bernard Granger, Damien Ringuenet, Eleni T Tzavara, Jean-Luc Martinot, Marie-Laure Paillère Martinot
BACKGROUND: Although treatment-resistant and nontreatment-resistant depressed patients show structural brain anomalies relative to healthy controls, the difference in regional volumetry between these two groups remains undocumented. METHODS: A whole-brain voxel-based morphometry (VBM) analysis of regional volumes was performed in 125 participants' magnetic resonance images obtained on a 1.5 Tesla scanner; 41 had treatment-resistant depression (TRD), 40 nontreatment-resistant depression (non-TRD), and 44 were healthy controls...
August 9, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28730223/histopathological-diagnosis-and-its-correlations-with-anatomoclinical-features-surgical-approach-and-postoperative-prognosis-in-sacral-tumors
#6
Oana Ilona David, Corina Veronica Lupaşcu-Ursulescu, Cristian Dumitru Lupaşcu, Aurelia Mihaela Sandu, Victor Dan Eugen Strâmbu, Daniel Alin Cristian, Ştefan Iulian Bedereag, Irina Alexandra Calangea, Elena Violeta Radu, IonuŢ Simion Coman, Vlad Andrei Porojan, Valentin Titus Grigorean
INTRODUCTION: Sacral tumors encompass numerous histopathological types. They represent an uncommon pathology and, when diagnosed, they are often in advanced stage of the disease, becoming a therapeutic challenge. The correct treatment of a sacral tumor should be established by a multidisciplinary team that will assess the exact anatomical, imagistic and histopathological characteristic of the tumors thus choosing an optimal surgical approach while taking into consideration the risk of recurrence...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28630074/the-enterohemorrhagic-escherichia-coli-effector-espw-triggers-actin-remodeling-in-a-rac1-dependent-manner
#7
Pamela Sandu, Valerie F Crepin, Hauke Drechsler, Andrew D McAinsh, Gad Frankel, Cedric N Berger
Enterohemorrhagic Escherichia coli (EHEC) is a diarrheagenic pathogen that colonizes the gut mucosa and induces attaching-and-effacing lesions. EHEC employs a type III secretion system (T3SS) to translocate 50 effector proteins that hijack and manipulate host cell signaling pathways, which allow bacterial colonization and subversion of immune responses and disease progression. The aim of this study was to characterize the T3SS effector EspW. We found espW in the sequenced O157:H7 and non-O157 EHEC strains as well as in Shigella boydii Furthermore, a truncated version of EspW, containing the first 206 residues, is present in EPEC strains belonging to serotype O55:H7...
September 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28528738/our-initial-experience-with-ventriculo-epiplooic-shunt-in-treatment-of-hydrocephalus-in-two-centers
#8
Valentin Titus Grigorean, Aurelia Mihaela Sandu, Mihai Popescu, Ioan Stefan Florian, Cristian Dumitru Lupascu, Corina Lupascu Ursulescu
INTRODUCTION: Hydrocephalus represents impairment in cerebrospinal fluid (CSF) dynamics. If the treatment of hydrocephalus is considered difficult, the repeated revisions of ventriculo-peritoneal (VP) shunts are even more challenging. OBJECTIVE: The aim of this article is to evaluate the efficiency of ventriculo-epiplooic (VEp) shunt as a feasible alternative in hydrocephalic patients. MATERIAL AND METHODS: A technical modification regarding the insertion of peritoneal catheter was imagined: midline laparotomy 8-10cm long was performed in order to open the peritoneal cavity; the great omentum was dissected between its two layers; we placed the distal end of the catheter between the two epiplooic layers; a fenestration of 4cm in diameter into the visceral layer was also performed...
May 11, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28523294/autophagy-in-aging-and-disease
#9
Mădălina Fîlfan, Raluca Elena Sandu, Alexandra Daniela Zăvăleanu, Andrei GreşiŢă, Daniela Gabriela Glăvan, Denissa Greta Olaru, Aurel Popa-Wagner
Autophagy is a catabolic degradation system used to destroy and recycle the unnecessary or damaged components of a cell. Autophagy is present at a basal level in all mammals and is regulated by some conditions, such as oxidative stress, starvation or hypoxia. In aged tissues, increased but also decreased expression of autophagy-specific proteins, Beclin 1, LC3, Atg5 and Atg7 has been reported. Likewise, it could be shown that the lifespan of yeast, nematodes and flies is prolonged by pharmacologically stimulated autophagy using exogenous administered spermidine...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28443268/complicated-postoperative-course-after-pulmonary-artery-sling-repair-and-slide-tracheoplasty
#10
Angelika Weber, Birgit Donner, Marie-Hélène Perez, Stefano Di Bernardo, Daniel Trachsel, Kishore Sandu, Nicole Sekarski
Pulmonary artery sling (PAS) is a rare congenital condition in which the left pulmonary artery (LPA) arises from the right pulmonary artery, and then passes between the trachea and the esophagus to reach the left lung, thereby forming a sling around the airway. It is often associated with intrinsic tracheal stenosis due to complete cartilaginous rings. Therapeutic management nowadays consists of one-stage reimplantation of the LPA and tracheoplasty with cardiopulmonary bypass support. Here, we present a 7-week-old boy with PAS and long-segment tracheal stenosis (LSTS) who underwent surgical intervention consisting of reimplantation of the LPA and slide tracheoplasty...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28413344/analytical-results-regarding-electrostatic-resonances-of-surface-phonon-plasmon-polaritons-separation-of-variables-with-a-twist
#11
R C Voicu, T Sandu
The boundary integral equation (BIE) method ascertains explicit relations between localized surface phonon and plasmon polariton resonances and the eigenvalues of its associated electrostatic operator. We show that group-theoretical analysis of the Laplace equation can be used to calculate the full set of eigenvalues and eigenfunctions of the electrostatic operator for shapes and shells described by separable coordinate systems. These results not only unify and generalize many existing studies, but also offer us the opportunity to expand the study of phenomena such as cloaking by anomalous localized resonance...
March 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28193123/ventriculoportal-shunt-a-new-transomphalic-extraperitoneal-surgical-technique-in-treatment-of-hydrocephalus
#12
Valentin Titus Grigorean, Aurelia Mihaela Sandu, Mihai Popescu, Victor Strambu
AIM: The aim of this article was to report a new transomphalic extraperitoneal surgical technique for treatment of hydrocephalus, called ventriculoportal shunt. MATERIALS AND METHODS: We performed ventriculoportal shunt on an experimental animal (pig). The particularity of ventriculoportal shunt consists in the fact that the distal end of the catheter is inserted transomphalic extraperitoneally in the portal system through reopened umbilical vein. We present technical details regarding this new surgical technique...
June 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28159008/unravelling-networks-in-local-public-health-policymaking-in-three-european-countries-a-systems-analysis
#13
MULTICENTER STUDY
Hilde P E M Spitters, Cathrine J Lau, Petru Sandu, Marcel Quanjel, Diana Dulf, Charlotte Glümer, Hans A M van Oers, Ien A M van de Goor
BACKGROUND: Facilitating and enhancing interaction between stakeholders involved in the policymaking process to stimulate collaboration and use of evidence, is important to foster the development of effective Health Enhancing Physical Activity (HEPA) policies. Performing an analysis of real-world policymaking processes will help reveal the complexity of a network of stakeholders. Therefore, the main objectives were to unravel the stakeholder network in the policy process by conducting three systems analyses, and to increase insight into the similarities and differences in the policy processes of these European country cases...
February 3, 2017: Health Research Policy and Systems
https://www.readbyqxmd.com/read/28149941/a-comparison-of-measurement-methods-of-hippocampal-atrophy-rate-for-predicting-alzheimer-s-dementia-in-the-aberdeen-birth-cohort-of-1936
#14
Arnab K Rana, Anca-Larisa Sandu, Kenna L Robertson, Christopher J McNeil, Lawrence J Whalley, Roger T Staff, Alison D Murray
INTRODUCTION: Various methods are available to measure hippocampal atrophy rate. We compared methods to predict Alzheimer's dementia. METHODS: Participants with brain imaging at ages 69 and 73 years were identified from a previous study. Simple manual measures and computationally automated volumetry were performed. Receiver operating characteristics assessed the predictive ability of each method at baseline and on logit regression analysis of two serial scans. RESULTS: Ten of 149 participants developed Alzheimer's dementia and had lower baseline volumes (3647 vs...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28139253/determinants-of-evidence-use-in-public-health-policy-making-results-from-a-study-across-six-eu-countries
#15
Ien van de Goor, Riitta-Maija Hämäläinen, Ahmed Syed, Cathrine Juel Lau, Petru Sandu, Hilde Spitters, Leena Eklund Karlsson, Diana Dulf, Adriana Valente, Tommaso Castellani, Arja R Aro
The knowledge-practice gap in public health is widely known. The importance of using different types of evidence for the development of effective health promotion has also been emphasized. Nevertheless, in practice, intervention decisions are often based on perceived short-term opportunities, lacking the most effective approaches, thus limiting the impact of health promotion strategies. This article focuses on facilitators and barriers in the use of evidence in developing health enhancing physical activity policies...
January 20, 2017: Health Policy
https://www.readbyqxmd.com/read/28121201/trigeminocardiac-reflex-in-cerebrovascular-surgery-a-review-and-an-attempt-of-a-predictive-analysis
#16
REVIEW
Nora Sandu, Tumul Chowdhury, Cyrill Meuwly, Bernhard Schaller
Trigemino-cardiac reflex (TCR) is a well-established neurogenic reflex that is primarily observed in many neurosurgical procedures, especially skull base surgery. Few management strategies have been highlighted in the literature; however, controversies still exist related to this topic. Areas covered: The authors present for the first time the results of a multivariable analysis to predict the TCR during cerebrovascular surgery. However, such first statistical results have not yet any impact on the treatment of the TCR, as correlation is not the cause...
March 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28099335/micronodular-pattern-of-organizing-pneumonia-case-report-and-systematic-literature-review
#17
REVIEW
François Lebargy, Davy Picard, Jean Hagenburg, Olivier Toubas, Jeanne-Marie Perotin, Sebastian Sandu, Gaëtan Deslee, Sandra Dury
RATIONALE: Organizing pneumonia (OP) is a clinicopathological entity characterized by granulation tissue plugs in the lumen of small airways, alveolar ducts, and alveoli. OP can be cryptogenic (primary) (COP) or secondary to various lung injuries. PATIENT CONCERNS: We report the case of a 38-year-old male smoker with COP presenting in the form of diffuse micronodules on computed tomography (CT) scan and describe the clinical, radiological, and functional characteristics of micronodular pattern of organizing pneumonia (MNOP) based on a review of the literature including 14 cases...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28093317/stem-cell-therapies-in-preclinical-models-of-stroke-is-the-aged-brain-microenvironment-refractory-to-cell-therapy
#18
Raluca Elena Sandu, Adrian Tudor Balseanu, Catalin Bogdan, Mark Slevin, Eugen Petcu, Aurel Popa-Wagner
Stroke is a devastating disease demanding vigorous search for new therapies. Initial enthusiasm to stimulate restorative processes in the ischemic brain by means of cell-based therapies has meanwhile converted into a more balanced view recognizing impediments that may be related to unfavorable age-associated environments. Recent results using a variety of drug, cell therapy or combination thereof suggest that, (i) treatment with Granulocyte-Colony Stimulating Factor (G-CSF) in aged rats has primarily a beneficial effect on functional outcome most likely via supportive cellular processes such as neurogenesis; (ii) the combination therapy, G-CSF with mesenchymal cells (G-CSF+BM-MSC or G-CSF+BM-MNC) did not further improve behavioral indices, neurogenesis or infarct volume as compared to G-CSF alone in aged animals; (iii) better results with regard to integration of transplanted cells in the aged rat environment have been obtained using iPS of human origin; (iv) mesenchymal cells may be used as drug carriers for the aged post-stroke brains...
January 14, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28048293/su-f-t-605-implementation-of-the-conformity-gradient-index-cgi-to-intracranial-linac-based-stereotactic-plans-to-evaluate-possible-improvements-in-treatment-planning
#19
A Sandu, S Thompson, A Ayan, J Woollard, N Gupta
PURPOSE: To retrospectively evaluate the planning quality of a sample of intracranial, linac-based, dynamic arc MLC and VMAT stereotactic plans by calculating the effective gradient, Conformity Score (CGIc) and Gradient Score Index (CGIg), and determine if the Conformity/Gradient Index (CGI) may be a useful metric to guide our current treatment planning process. METHODS: We evaluated single lesion VMAT, single lesion dynamic arc, and single isocenter, 2-lesion linac-based, intracranial, VMAT treatment plans originally created in Eclipse™...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27881131/an-evaluation-of-equity-and-equality-in-physical-activity-policies-in-four-european-countries
#20
Riitta-Maija Hämäläinen, Petru Sandu, Ahmed M Syed, Mette W Jakobsen
BACKGROUND: There is strong research evidence on the importance of health equity and equality for wellbeing in societies. As chronic non-communicable diseases are widespread, the positive impact of physical activity (PA) on health has gained importance. However, PA at the population level is far from optimal. PA depends not only on individual factors, but also on policies for PA in sport, health, transport, education and other sectors, on social and cultural factors, and on the environment...
November 24, 2016: International Journal for Equity in Health
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