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https://www.readbyqxmd.com/read/28719865/antioxidant-effect-of-exercise-exploring-the-role-of-the-mitochondrial-complex-i-superassembly
#1
J R Huertas, S Al Fazazi, A Hidalgo-Gutierrez, L C López, R A Casuso
Mitochondrial respiratory complexes become assembled into supercomplexes (SC) under physiological conditions. One of the functional roles of these entities is the limitation of reactive oxygen species (ROS) produced by complex I (CI) of the respiratory chain. We sought to determine whether the systemic antioxidant effect of exercise is mediated by the assembly of mitochondrial CIs into SCs in rats. Male Wistar rats were exercise trained or remained sedentary for ten weeks; then, blood samples were collected, and the gastrocnemius muscle was isolated...
July 11, 2017: Redox Biology
https://www.readbyqxmd.com/read/28719441/fourteen-day-in-vivo-testing-of-a-compliant-thoracic-artificial-lung
#2
David J Skoog, Joshua R Pohlmann, David S Demos, Christopher N Scipione, Amit Iyengar, Rebecca E Schewe, Ahmed B Suhaib, Kelly L Koch, Keith E Cook
The compliant thoracic artificial lung (cTAL) has been studied in acute in vivo and in vitro experiments. The cTAL's long-term function and potential use as a bridge to lung transplantation are assessed presently. The cTAL without anticoagulant coatings was attached to sheep (n = 5) via the pulmonary artery and left atrium for 14 days. Systemic heparin anticoagulation was used. Compliant thoracic artificial lung resistance, cTAL gas exchange, hematologic parameters, and organ function were recorded. Two sheep were euthanized for nondevice-related issues...
July 14, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28719310/severity-of-pneumonia-in-under-5-year-old-children-from-developing-countries-a-multicenter-prospective-observational-study
#3
Thomas Bénet, Valentina Sanchez Picot, Shally Awasthi, Nitin Pandey, Ashish Bavdekar, Anand Kawade, Annick Robinson, Mala Rakoto-Andrianarivelo, Maryam Sylla, Souleymane Diallo, Graciela Russomando, Wilma Basualdo, Florence Komurian-Pradel, Hubert Endtz, Philippe Vanhems, Gláucia Paranhos-Baccalà, For The Gabriel Network
Pneumonia is the leading cause of death in children. The objectives were to evaluate the microbiological agents linked with hypoxemia in hospitalized children with pneumonia from developing countries, to identify predictors of hypoxemia, and to characterize factors associated with in-hospital mortality. A multicenter, observational study was conducted in five hospitals, from India (Lucknow, Vadu), Madagascar (Antananarivo), Mali (Bamako), and Paraguay (San Lorenzo). Children aged 2-60 months with radiologically confirmed pneumonia were enrolled prospectively...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718522/t2-prepared-balanced-steady-state-free-precession-bssfp-for-quantifying-whole-blood-oxygen-saturation-at-1-5t
#4
Ana E Rodríguez-Soto, Osheiza Abdulmalik, Michael C Langham, Nadav Schwartz, Hyunyeol Lee, Felix W Wehrli
PURPOSE: To establish a calibration equation to convert human blood T2 to the full range of oxygen saturation levels (HbO2 ) and physiologic hematocrit (Hct) values using a T2 -prepared balanced steady-state free precession sequence (T2 -SSFP) at 1.5T. METHODS: Blood drawn from 10 healthy donors (29.1 ± 3.9 years old) was prepared into samples of varying HbO2 and Hct (n = 79), and imaged using T2 -SSFP sequence at 37°C and interrefocusing interval τ180  = 12 ms...
July 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28718423/angiogenesis-and-metabolism-entwined-for-therapy-resistance
#5
REVIEW
Gabriela Jiménez-Valerio, Oriol Casanovas
Angiogenesis and metabolism are entwined processes that permit tumor growth and progression. Blood vessel supply is necessary for tumor survival not only by providing oxygen and nutrients for anabolism but also by removing waste products from cellular metabolism. On the other hand, blocking angiogenesis with antiangiogenic therapies shows clinical benefits in treating several tumor types. Nevertheless, resistance to therapy emerges over time. In this review we discuss a novel mechanism of adaptive resistance involving metabolic adaptation of tumor cells, and we also provide examples of tumor adaptation to therapy, which may represent a new mechanism of resistance in several types of cancer...
January 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28718257/risk-factors-for-heat-related-deaths-during-the-june-2015-heat-wave-in-karachi-pakistan
#6
Syed Ghazanfar Saleem, Tehreem Ansari, Ashraf Shamshad Ali, Sara Fatima, Mariam Hassan Rizvi, Muhammad Abdul Samad
BACKGROUND: Mortality as a consequence of heat related illness is a public health concern. Emergency department (ED) experiences increased patients' flow and decreased survival as a consequence of heat stroke during the episodes of heat wave. The present study was conducted to identify the risk factors for mortality among victims of heat wave (17th - 23rd June), 2015 evaluated in the Emergency Department of The Indus Hospital (TIH), Karachi. METHODS: In this cross-sectional study data was retrospectively collected...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28718098/massive-hemorrhage-and-transfusion-in-the-operating-room
#7
Brian Muirhead, Andrew D H Weiss
PURPOSE: In this Continuing Professional Development module, we review the pathophysiology and clinical manifestations associated with massive hemorrhage as well as laboratory investigations and appropriate therapeutic measures. In addition to reviewing the available blood/plasma products and adjunct therapy, we also explore the role of the anesthesiologist in a massive transfusion protocol scenario. PRINCIPAL FINDINGS: Massive hemorrhage can be either anticipated or unexpected...
July 17, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28717916/colon-perfusion-patterns-during-colorectal-resection-using-visible-light-spectroscopy
#8
Henry Hoffmann, Tarik Delko, Philipp Kirchhoff, Rachel Rosenthal, Juliane Schäfer, Marko Kraljević, Christoph Kettelhack
BACKGROUND: The impact of blood supply to the anastomosis on development of anastomotic leakage is still a matter of debate. Considering that bowel perfusion may be affected by manipulation during surgery, perfusion assessment of the anastomosis alone may be of limited value. We propose perfusion assessment at different time points during surgery to explore the dynamics of bowel perfusion during colorectal resection and its impact on outcome. METHODS: In this prospective cohort study, patients undergoing elective colorectal resection were eligible...
July 17, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28717223/investigation-of-the-changes-in-the-power-distribution-in-resting-state-brain-networks-associated-with-pure-conduct-disorder
#9
Jiang Zhang, Jiansong Zhou, Fengmei Lu, Liangyin Chen, Yunzhi Huang, Huafu Chen, Yutao Xiang, Gang Yang, Zhen Yuan
Conduct disorder (CD) is a psychiatric disorder in children and adolescence. To investigate changes in the power distribution in brain networks between CD and typically developing (TD) groups, resting-state functional magnetic resonance imaging (rsfMRI) data of thirty-six subjects were first recorded, and then the data were preprocessed using DPARSF and SPM8. Meanwhile, the power of the blood oxygenation level-dependent (BOLD) signals of ninety brain regions was acquired using the integral of the Welch power spectral density (PSD)...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716686/sedative-and-cardiovascular-effects-of-intranasal-or-intramuscular-dexmedetomidine-in-healthy-dogs
#10
Fabiana Micieli, Bruna Santangelo, Fabiana Reynaud, Alessandro Mirra, Giusy Napoleone, Giovanni Della Valle, Karine G Portier, Giancarlo Vesce
OBJECTIVE: To compare the clinical effects and sedation scores following either intranasal (IN) or intramuscular (IM) administration of dexmedetomidine in dogs. STUDY DESIGN: Prospective, blinded, randomized, clinical study. ANIMALS: A total of 20 client-owned dogs scheduled for noninvasive diagnostic procedures. METHODS: Dogs were allocated to be administered dexmedetomidine 0.02 mg kg(-1) IN (IN group) or IM (IM group)...
April 5, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28716304/three-dimensional-computational-model-of-a-blood-oxygenator-reconstructed-from-micro-ct-scans
#11
C D'Onofrio, R van Loon, S Rolland, R Johnston, L North, S Brown, R Phillips, J Sienz
Cardiopulmonary bypass procedures are one of the most common operations and blood oxygenators are the centre piece for the heart-lung machines. Blood oxygenators have been tested as entire devices but intricate details on the flow field inside the oxygenators remain unknown. In this study, a novel method is presented to analyse the flow field inside oxygenators based on micro Computed Tomography (μCT) scans. Two Hollow Fibre Membrane (HFM) oxygenator prototypes were scanned and three-dimensional full scale models that capture the device-specific fibre distributions are set up for computational fluid dynamics analysis...
July 14, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28715342/quantitative-evaluation-of-rehabilitation-effect-on-peripheral-circulation-of-diabetic-foot
#12
Yao-Kuang Huang, Chang-Cheng Chang, Pin-Xing Lin, Bor-Shyh Lin
Diabetics may encounter different foot problems, which easily lead to infection, ulcers, and increased risk of amputation due to nerve or vascular injury. In order to reduce the risk of amputation, Buerger's exercise is one of the frequently used rehabilitation to improve the blood circulation in the lower limbs. However, it is difficult to evaluate the rehabilitation efficiency of Buerger's exercise objectively. In this study, a novel non-invasively optical system was developed to non-invasively monitor the change of the foot blood circulation before and after long-term Buerger's exercise...
July 13, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28715004/an-implantable-multimodal-sensor-for-oxygen-neurotransmitters-and-electrophysiology-during-spreading-depolarization-in-the-deep-brain
#13
Caddy N Hobbs, Justin A Johnson, Matthew D Verber, R Mark Wightman
Brain tissue injury is often accompanied by spreading depolarization (SD) events, marked by widespread cellular depolarization and cessation of neuronal firing. SD recruits viable tissue into the lesion, making it a focus for intervention. During SD, drastic fluctuations occur in ion gradients, extracellular neurotransmitter concentrations, cellular metabolism, and cerebral blood flow. Measuring SD requires a multimodal approach to capture the array of changes. However, the use of multiple sensors can inflict tissue damage...
July 17, 2017: Analyst
https://www.readbyqxmd.com/read/28713774/epic-immune-battles-of-history-neutrophils-vs-staphylococcus-aureus
#14
REVIEW
Fermin E Guerra, Timothy R Borgogna, Delisha M Patel, Eli W Sward, Jovanka M Voyich
Neutrophils are the most abundant leukocytes in human blood and the first line of defense after bacteria have breached the epithelial barriers. After migration to a site of infection, neutrophils engage and expose invading microorganisms to antimicrobial peptides and proteins, as well as reactive oxygen species, as part of their bactericidal arsenal. Ideally, neutrophils ingest bacteria to prevent damage to surrounding cells and tissues, kill invading microorganisms with antimicrobial mechanisms, undergo programmed cell death to minimize inflammation, and are cleared away by macrophages...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28713640/human-adipose-derived-mesenchymal-stem-cells-respond-to-short-term-hypoxia-by-secreting-factors-beneficial-for-human-islets-in-vitro-and-potentiate-antidiabetic-effect-in-vivo
#15
Simen W Schive, Mohammad Reza Mirlashari, Grete Hasvold, Mengyu Wang, Dag Josefsen, Hans Petter Gullestad, Olle Korsgren, Aksel Foss, Gunnar Kvalheim, Hanne Scholz
Adipose-derived mesenchymal stem cells (ASCs) release factors beneficial for islets in vitro and protect against hyperglycemia in rodent models of diabetes. Oxygen tension has been shown to induce metabolic changes and alter ASCs' release of soluble factors. The effects of hypoxia on the antidiabetic properties of ASCs have not been explored. To investigate this, we incubated human ASCs for 48 h in 21% (normoxia) or 1% O2 (hypoxia) and compared viability, cell growth, surface markers, differentiation capability, and soluble factors in the conditioned media (CM)...
2017: Cell Medicine
https://www.readbyqxmd.com/read/28713639/a-prospective-nonrandomized-no-placebo-controlled-phase-i-ii-clinical-trial-assessing-the-safety-and-efficacy-of-intramuscular-injection-of-autologous-adipose-tissue-derived-mesenchymal-stem-cells-in-patients-with-severe-buerger-s-disease
#16
Jeong Chan Ra, Euicheol C Jeong, Sung Keun Kang, Seog Ju Lee, Kyoung Ho Choi
Buerger's disease is a rare and severe disease affecting the blood vessels of the limbs. Adipose tissue-derived mesenchymal stem cells (ADSCs) have the potential to cure Buerger's disease when developed as a stem cell drug. In the present study, we conducted a prospective, nonrandomized, no placebo-controlled, phase I/II clinical trial with a 2-year follow-up questionnaire survey. A total of 17 patients were intramuscularly administered autologous ADSCs at a dose of 5 million cells/kg. The incidence of adverse events (AEs), adverse drug reaction (ADR), and serious adverse events (SAEs) was monitored...
2017: Cell Medicine
https://www.readbyqxmd.com/read/28712878/antidepressants-are-cytotoxic-to-rat-primary-blood-brain-barrier-endothelial-cells-at-high-therapeutic-concentrations
#17
Ekramy Elmorsy, Ayat Al-Ghafari, Fahd M Almutairi, Amal Misbah Aggour, Wayne G Carter
Antidepressants are commonly employed for the treatment of major depressive disorders and other psychiatric conditions. We investigated the relatively acute cytotoxic effects of three commonly prescribed antidepressants: fluoxetine, sertraline, and clomipramine on rat primary blood brain barrier endothelial cells over a concentration range of 0.1-100μM. At therapeutic concentrations (0.1μM) no significant cytotoxicity was observed after 4, 24, or 48h. At high therapeutic to overdose concentrations (1-100μM), antidepressants reduced cell viability in proportion to their concentration and exposure duration...
July 13, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28712812/peroxynitrite-footprint-in-circulating-neutrophils-of-abdominal-aortic-aneurysm-patients-is-lower-in-statin-than-in-non-statin-users
#18
M E Groeneveld, J J van der Reijden, G J Tangelder, L C Westin, L Renwarin, R J P Musters, W Wisselink, K K Yeung
OBJECTIVES: Extensive reactive oxygen and nitrogen species (also reactive species) production is a mechanism involved in abdominal aortic aneurysm (AAA) development. White blood cells (WBCs) are a known source of reactive species. Their production may be decreased by statins, thereby reducing the AAA growth rate. Reactive species production in circulating WBCs of AAA patients and the effect of statins on their production was investigated. METHODS: This observational study investigated reactive species production in vivo and ex vivo in circulating WBCs of AAA patients, using venous blood from patients prior to elective AAA repair (n = 34; 18 statin users) and from healthy volunteers (n = 10)...
July 14, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28712259/four-week-living-high-training-low-program-enhances-3000-m-and-5000-m-time-trials-by-improving-energy-metabolism-during-submaximal-exercise-in-athletes
#19
Hun-Young Park, Sungho Kim, Sang-Seok Nam
PURPOSE: This study aimed to determine the effect of a 4-week living high training low (LHTL) versus a living low training low (LLTL) program on energy metabolism during submaximal exercise and 3000-m and 5000-m time trial (TT) in athletes. METHODS: Male athletes (n = 20) were randomly assigned to the LLTL (n = 10, living at 1000 m and training at 700-1330 m) and LHTL (n = 10, living at simulated 3000 m and training at 700-1330 m) groups. We compared energy metabolisms during submaximal exercise on a treadmill and aerobic exercise performance (3000 m and 5000 m TT) before and after 4 weeks of training...
March 31, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28711861/healthcare-infrastructure-capacity-to-respond-to-severe-acute-respiratory-infection-sari-and-sepsis-in-vietnam-a-low-middle-income-country
#20
Vu Quoc Dat, Nguyen Thanh Long, Kim Bao Giang, Pham Bich Diep, Ta Hoang Giang, Janet V Diaz
PURPOSE: This study investigated the availability of relevant structural and human resources needed for the clinical management of patients with severe acute respiratory infections and sepsis in critical care units in Vietnam. MATERIAL AND METHODS: A questionnaire survey was conducted by purposive sampling of 128 hospitals (36% of total hospitals in surveyed provinces), including 25 provincial and 103 district level hospitals, from 20 provinces in Vietnam. Data on availability of hospital characteristics, structural resources and health care workers was then analyzed...
July 10, 2017: Journal of Critical Care
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