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Christian Bermudez

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https://www.readbyqxmd.com/read/29441264/-bombyx-mori-silk-titania-gold-hybrid-materials-for-photocatalytic-water-splitting-combining-renewable-raw-materials-with-clean-fuels
#1
Stefanie Krüger, Michael Schwarze, Otto Baumann, Christina Günter, Michael Bruns, Christian Kübel, Dorothée Vinga Szabó, Rafael Meinusch, Verónica de Zea Bermudez, Andreas Taubert
The synthesis, structure, and photocatalytic water splitting performance of two new titania (TiO2)/gold(Au)/ Bombyx mori silk hybrid materials are reported. All materials are monoliths with diameters of up to ca. 4.5 cm. The materials are macroscopically homogeneous and porous with surface areas between 170 and 210 m2/g. The diameter of the TiO2nanoparticles (NPs) - mainly anatase with a minor fraction of brookite - and the Au NPs are on the order of 5 and 7-18 nm, respectively. Addition of poly(ethylene oxide) to the reaction mixture enables pore size tuning, thus providing access to different materials with different photocatalytic activities...
2018: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29435494/tick-borne-encephalitis-virus-vaccine-induced-human-antibodies-mediate-negligible-enhancement-of-zika-virus-infection-in-vitro-and-in-a-mouse-model
#2
James Duehr, Silviana Lee, Gursewak Singh, Gregory A Foster, David Krysztof, Susan L Stramer, Maria C Bermúdez González, Eva Menichetti, Robert Geretschläger, Christian Gabriel, Viviana Simon, Jean K Lim, Florian Krammer
Recent reports in the scientific literature have suggested that anti-dengue virus (DENV) and anti-West Nile virus (WNV) immunity exacerbates Zika virus (ZIKV) pathogenesis in vitro and in vivo in mouse models. Large populations of immune individuals exist for a related flavivirus (tick-borne encephalitis virus [TBEV]), due to large-scale vaccination campaigns and endemic circulation throughout most of northern Europe and the southern Russian Federation. As a result, the question of whether anti-TBEV immunity can affect Zika virus pathogenesis is a pertinent one...
January 2018: MSphere
https://www.readbyqxmd.com/read/29433532/is-there-a-difference-in-bleeding-after-left-ventricular-assist-device-implant-centrifugal-versus-axial
#3
Ann C Gaffey, Carol W Chen, Jennifer J Chung, Jason Han, Christian A Bermudez, Joyce Wald, Pavan Atluri
BACKGROUND: Continuous-flow left ventricular assist devices (CF-LVAD) have become the standard of care for patients with end stage heart failure. Device reliability has increased, bringing the potential for VAD, compared to transplant, into debate. However, complications continue to limit VADs as first line therapy. Bleeding is a major morbidity. A debate exists as to the difference in bleeding profile between the major centrifugal and axial flow devices. We hypothesized that there would be similar adverse bleeding event profiles between the 2 major CF-LVADs...
February 13, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29346256/causes-preventability-and-cost-of-unplanned-rehospitalizations-within-30-days-of-discharge-following-lung-transplantation
#4
Andrew M Courtwright, Derek Zaleski, Lisa Gardo, Vivek N Ahya, Jason D Christie, Maria Crespo, Denis Hadjiliadis, James Lee, Maria Molina, Namrata Patel, Mary Porteous, Edward E Cantu, Christian Bermudez, Joshua M Diamond
BACKGROUND: Unplanned rehospitalizations (UR) within 30 days of discharge are common following lung transplantation. It is unknown whether UR represent preventable gaps in care or necessary interventions for complex patients. The objective of this study was to assess the incidence, causes, risk factors, and preventability of UR following initial discharge after lung transplantation. METHODS: This was a single-center prospective cohort study. Subjects completed a modified Short Physical Performance Battery (SPPB) to assess frailty at listing and at initial hospital discharge after transplantation and the State-Trait Anxiety Inventory (STAI) at discharge...
January 18, 2018: Transplantation
https://www.readbyqxmd.com/read/29153427/does-a-mobile-ecls-program-reduce-mortality-for-patients-transported-for-ecls-therapy-for-severe-acute-respiratory-failure
#5
Jacob T Gutsche, Todd A Miano, William Vernick, Jesse Raiten, Christian Bermudez, Prashant Vallabjoysula, Karianna Milewski, Wilson Szeto, Meghan Lane Fall, Matthew L Williams, Prakash Patel, Mark E Mikkelsen, Cornel Chiu, Harish Ramakrishna, Jeremy Canon, John G Augoustides
OBJECTIVE: To understand if mobile extracorporeal membrane oxygenation reduces patient mortality during and after transport of patients requiring extracorporeal membrane oxygenation for acute respiratory distress syndrome. DESIGN: Retrospective chart review. SETTING: University affiliated tertiary care hospitals. PARTICIPANTS: Seventy-seven patients. INTERVENTIONS: Introduction of a mobile extracorporeal membrane oxygenation (ECMO) program designed to facilitate the implementation of ECMO at outside hospitals in patients too unstable for transport for ECMO...
September 2, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29152498/extracorporeal-life-support-in-preoperative-and-postoperative-heart-transplant-management
#6
REVIEW
Christian A Bermudez, D Michael McMullan
Increased experience with extracorporeal life support (ECLS) as a mode of cardiac support has expanded its use to diverse patient populations including patients requiring a bridge to heart transplantation and patients requiring posttransplant support for primary graft dysfunction (PGD). The use of ECLS is associated with acceptable outcomes in well-selected patients. While outcomes with the use of extracorporeal membrane oxygenation (ECMO) as a bridge to heart transplant have been variable, several series have confirmed the safe use of ECLS to stabilize patients prior to left ventricular assist device (LVAD) implantation...
October 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29102362/drug-eluting-stents-in-elderly-patients-with-coronary-artery-disease-senior-a-randomised-single-blind-trial
#7
Olivier Varenne, Stéphane Cook, Georgios Sideris, Sasko Kedev, Thomas Cuisset, Didier Carrié, Thomas Hovasse, Philippe Garot, Rami El Mahmoud, Christian Spaulding, Gérard Helft, José F Diaz Fernandez, Salvatore Brugaletta, Eduardo Pinar-Bermudez, Josepa Mauri Ferre, Philippe Commeau, Emmanuel Teiger, Kris Bogaerts, Manel Sabate, Marie-Claude Morice, Peter R Sinnaeve
BACKGROUND: Elderly patients regularly receive bare-metal stents (BMS) instead of drug-eluting stents (DES) to shorten the duration of double antiplatelet therapy (DAPT). The aim of this study was to compare outcomes between these two types of stents with a short duration of DAPT in such patients. METHODS: In this randomised single-blind trial, we recruited patients from 44 centres in nine countries. Patients were eligible if they were aged 75 years or older; had stable angina, silent ischaemia, or an acute coronary syndrome; and had at least one coronary artery with a stenosis of at least 70% (≥50% for the left main stem) deemed eligible for percutaneous coronary intervention (PCI)...
October 31, 2017: Lancet
https://www.readbyqxmd.com/read/29051526/arginase-structure-and-inhibition-catalytic-site-plasticity-reveals-new-modulation-possibilities
#8
Jérémie Mortier, Julien R C Prévost, Dominique Sydow, Sabine Teuchert, Christian Omieczynski, Marcel Bermudez, Raphaël Frédérick, Gerhard Wolber
Metalloenzyme arginase is a therapeutically relevant target associated with tumor growth. To fight cancer immunosuppression, arginase activity can be modulated by small chemical inhibitors binding to its catalytic center. To better understand molecular mechanisms of arginase inhibition, a careful computer-aided mechanistic structural investigation of this enzyme was conducted. Using molecular dynamics (MD) simulations in the microsecond range, key regions of the protein active site were identified and their flexibility was evaluated and compared...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28947190/lungs-from-older-donors-may-provide-a-breath-of-fresh-air-to-patients-awaiting-lung-transplant
#9
EDITORIAL
Christian A Bermudez, Maria M Crespo
No abstract text is available yet for this article.
September 4, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28942075/clinical-and-in-vitro-evidence-that-subclinical-hemolysis-contributes-to-lvad-thrombosis
#10
Carlo R Bartoli, David Zhang, Jooeun Kang, Samson Hennessy-Strahs, David Restle, Jessica Howard, Gretchen Redline, Christian Bermudez, Pavan Atluri, Michael A Acker
BACKGROUND: Recent data suggest that hemolysis contributes to left ventricular assist device (LVAD) thrombosis, but the mechanism is unknown. In a clinical study, we measured plasma free hemoglobin (pfHgb) and the incidence of LVAD thrombosis. In an in vitro study, we examined biophysical relationships between shear stress, pfHgb and von Willebrand factor (vWF) metabolism toward understanding mechanisms of LVAD thrombosis. METHODS: In the clinical study, blood samples were obtained from continuous-flow LVAD patients (n = 30)...
September 21, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28938306/different-clinical-course-and-complications-in-interagency-registry-for-mechanically-assisted-circulatory-support-1-patients-managed-with-or-without-extracorporeal-membrane-oxygenation
#11
Jason J Han, Jennifer Chung, Carol W Chen, Ann C Gaffey, Alex Sotolongo, Christyna Justice, Alyse E Ameer, J Eduardo Rame, Christian Bermudez, Michael A Acker, Pavan Atluri
Extracorporeal membrane oxygenation (ECMO) as a bridge to left ventricular assist device (LVAD) implantation has shown promise in improving end-organ function and optimizing outcomes in some critically ill patients, but the practice remains controversial. Retrospective review of patients who received LVADs from May 2008 to September 2016 at a high-volume, tertiary care cardiovascular center was performed. Subjects were Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) class 1 patients divided into ECMO bridge and non-ECMO bridge cohorts...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28917560/outcomes-of-rescue-cardiopulmonary-support-for-periprocedural-acute-hemodynamic-decompensation-in-patients-undergoing-catheter-ablation-of-electrical-storm
#12
Andres Enriquez, Jackson Liang, Javier Gentile, Robert D Schaller, Gregory E Supple, David S Frankel, Fermin C Garcia, Joyce Wald, Edo Y Birati, J Eduardo Rame, Christian Bermudez, David J Callans, Francis E Marchlinski, Pasquale Santangeli
BACKGROUND: In patients with ventricular tachycardia or ventricular fibrillation (VT/VF) electrical storm (ES) undergoing catheter ablation (CA), hypotension due to refractory VT/VF, use of anesthesia, and cardiac stunning due to repeated implantable cardioverter-defibrillator shocks might precipitate acute hemodynamic decompensation (AHD). OBJECTIVE: We evaluated the outcomes of emergent cardiopulmonary support with extracorporeal membrane oxygenation (ECMO) to rescue AHD in patients undergoing CA of ES...
September 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28872353/quantitative-evidence-for-revising-the-definition-of-primary-graft-dysfunction-after-lung-transplant
#13
Edward Cantu, Joshua M Diamond, Yoshikazu Suzuki, Jared Lasky, Christian Schaufler, Brian Lim, Rupal Shah, Mary Porteous, David J Lederer, Steven M Kawut, Scott M Palmer, Laurie D Snyder, Matthew G Hartwig, Vibha N Lama, Sangeeta Bhorade, Christian Bermudez, Maria Crespo, John McDyer, Keith Wille, Jonathan Orens, Pali D Shah, Ann Weinacker, David Weill, David Wilkes, David Roe, Chadi Hage, Lorraine B Ware, Scarlett L Bellamy, Jason D Christie
RATIONALE: Primary graft dysfunction (PGD) is a form of acute lung injury that occurs after lung transplantation. The definition of PGD was standardized in 2005. Since that time, clinical practice has evolved and this definition is increasingly used as a primary endpoint for clinical trials; therefore, validation is warranted. OBJECTIVE: We sought to determine whether refinements to the 2005 consensus definition could further improve construct validity. METHODS: Data from the Lung Transplant Outcomes Group multi-centered cohort was used to compare variations to the PGD definition, including alternate oxygenation thresholds, inclusion of additional severity groups, and effects of procedure type and mechanical ventilation...
September 5, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28729354/continuous-flow-lvad-support-causes-a-distinct-form-of-intestinal-angiodysplasia
#14
Jooeun Kang, Samson Hennessy-Strahs, Pawel Kwiatkowski, Christian A Bermudez, Michael A Acker, Pavan Atluri, Patrick I McConnell, Carlo R Bartoli
RATIONALE: The objective of this autopsy study was to determine whether gastrointestinal angiodysplasia develops during continuous-flow left ventricular assist device (LVAD) support. OBJECTIVE: LVAD support causes pathologic degradation of von Willebrand factor (vWF) and bleeding from gastrointestinal angiodysplasia at an alarming rate. It has been speculated that LVAD support itself may cause angiodysplasia. The relationship to abnormal vWF metabolism is unknown...
September 29, 2017: Circulation Research
https://www.readbyqxmd.com/read/28658533/postoperative-outcomes-and-management-strategies-for-coronary-artery-disease-in-patients-in-need-of-a-lung-transplantation
#15
Sameer J Khandhar, Andrew D Althouse, Suresh Mulukutla, Robert Kormos, Catalin Toma, Oscar Marroquin, Elizabeth Volz, Leben Tefera, Christian Bermudez
BACKGROUND: Patients requiring lung transplantation (LTx) may also have coronary artery disease (CAD). The peri-operative management and long-term outcomes of these patients are not well established. METHODS: Patients referred for LTx from 2008 to 2014 were included in this study. CAD was defined by angiography as no CAD (stenosis <20%), moderate CAD (20%-69%), and significant CAD (stenosis ≥70%). Revascularization was per recommendations of local heart team...
June 28, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28629710/anaerobic-digestion-of-tuna-waste-for-the-production-of-volatile-fatty-acids
#16
Noela Bermúdez-Penabad, Christian Kennes, Maria C Veiga
Fish canning industries generate a significant amount of solid waste that can be digested anaerobically into volatile fatty acids (VFA). The aim of this research was to study the effect of various pHs, ranging from 5.0 to 10.0, and percentage of total solids on the anaerobic digestion of tuna waste into VFA, both in batch assays and continuous reactor. The production of VFA was affected by pH and was significantly higher under alkaline conditions. At pH 8.0, the VFA production reached 30,611mgCOD/L. The VFA mainly consisted of acetic, propionic, n-butyric and i-valeric acids...
June 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28533303/cardiopulmonary-resuscitation-in-adults-and-children-with-mechanical-circulatory-support-a-scientific-statement-from-the-american-heart-association
#17
REVIEW
Mary Ann Peberdy, Jason A Gluck, Joseph P Ornato, Christian A Bermudez, Russell E Griffin, Vigneshwar Kasirajan, Richard E Kerber, Eldrin F Lewis, Mark S Link, Corinne Miller, Jeffrey J Teuteberg, Ravi Thiagarajan, Robert M Weiss, Brian O'Neil
Cardiac arrest in patients on mechanical support is a new phenomenon brought about by the increased use of this therapy in patients with end-stage heart failure. This American Heart Association scientific statement highlights the recognition and treatment of cardiovascular collapse or cardiopulmonary arrest in an adult or pediatric patient who has a ventricular assist device or total artificial heart. Specific, expert consensus recommendations are provided for the role of external chest compressions in such patients...
June 13, 2017: Circulation
https://www.readbyqxmd.com/read/28459743/the-use-of-gmp-produced-bone-marrow-derived-stem-cells-in-combination-with-extracorporeal-membrane-oxygenation-in-ards-an-animal-model
#18
Ergin Kocyildirim, Nayra Cárdenes, Antony Ting, Eder Cáceres, Christian BermUdez, Mauricio Rojas
Acute respiratory distress syndrome (ARDS) is the result of a wide variety of disorders, which can be associated with different clinical disorders or systemic diseases directly affecting the lungs. Currently, the only existing therapy is limited to supportive care. In a 6 hour pilot study, we analyzed the use of the combination of both stem cell and extracorporeal membrane oxygenation (ECMO) strategies to prevent or treat severe lung injury. A total of 11 sheep were used. Five sheep received Escherichia coli endotoxin as a control group (group 1)...
May 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28402990/the-use-of-gmp-produced-bone-marrow-derived-stem-cells-in-combination-with-extra-corporeal-membrane-oxygenation-in-ards-an-animal-model
#19
Ergin Kocyildirim, Nayra Cárdenes, Antony Ting, Eder Cáceres, Christian Bermúdez, Mauricio Rojas
RDS is the result of a wide variety of disorders, which can be associated with different clinical disorders or systemic diseases directly affecting the lungs. Currently, the only existing therapy is limited to supportive care. In a 6-hour pilot study, we analyzed the use of the combination of both stem cell and ECMO strategies to prevent or treat severe lung injury. A total of 11 sheep were used. 5 sheep received E. coli endotoxin as a control group (Group 1). 3 sheep that received E. coli endotoxin were treated with veno-venous ECMO support in Group 2...
April 11, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28360217/bilateral-lung-transplantation-for-bleomycin-associated-lung-injury
#20
Vivek Narayan, Charuhas Deshpande, Christian A Bermudez, Jaclyn M Golato, James C Lee, Joshua Diamond, David J Vaughn
This report details the successful use of bilateral lung transplantation for the management of severe postoperative bleomycin-associated lung injury. This case highlights that the extremely favorable prognosis of advanced testicular germ cell tumors after systemic chemotherapy (>90% cure rate) should not preclude lung transplant consideration in all cases, despite current guidance that considers an advanced malignancy to be a contraindication for lung transplant listing. The Oncologist 2017;22:620-622.
May 2017: Oncologist
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