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https://www.readbyqxmd.com/read/27909920/beyond-ferryl-mediated-hydroxylation-40%C3%A2-years-of-the-rebound-mechanism-and-c-h-activation
#1
REVIEW
Xiongyi Huang, John T Groves
Since our initial report in 1976, the oxygen rebound mechanism has become the consensus mechanistic feature for an expanding variety of enzymatic C-H functionalization reactions and small molecule biomimetic catalysts. For both the biotransformations and models, an initial hydrogen atom abstraction from the substrate (R-H) by high-valent iron-oxo species (Fe(n)=O) generates a substrate radical and a reduced iron hydroxide, [Fe(n-1)-OH ·R]. This caged radical pair then evolves on a complicated energy landscape through a number of reaction pathways, such as oxygen rebound to form R-OH, rebound to a non-oxygen atom affording R-X, electron transfer of the incipient radical to yield a carbocation, R(+), desaturation to form olefins, and radical cage escape...
December 1, 2016: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/27904041/fatty-acid-%C3%AE-oxidation-plays-a-key-role-in-regulating-cis-palmitoleic-acid-levels-in-the-liver
#2
Kohei Kawabata, Minako Karahashi, Takeshi Sakamoto, Yukiho Tsuji, Tohru Yamazaki, Mari Okazaki, Atsushi Mitsumoto, Naomi Kudo, Yoichi Kawashima
Different monounsaturated fatty acid (MUFA) species have distinct pathophysiological activities. cis-Palmitoleic acid (16:1n-7) was previously reported to improve insulin sensitivity in animal studies. The proportions of hepatic MUFAs are generally considered to reflect changes in the activities of fatty acid modifications (∆9 desaturation and fatty acid elongation). However, hepatic levels of 16:1n-7 are markedly lower than those of oleic acid (18:1n-9). Nevertheless, no convincing explanation has yet been provided for the low level of 16:1n-7...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903341/-the-application-of-conscious-sedation-with-a-small-dose-of-dexmedetomidine-and-sufentanil-in-elderly-patients-undergoing-multiple-intestinal-polyps-resection
#3
C M Shi, Y D Zhou, M Xu, X D Wang, L M Meng, X J Liu, X Y Guo
Objective: To explore the effectiveness and feasibility of conscious sedation with a low dose of dexmedetomidine and sufentanil during multiple intestinal polyps resection in elderly patients. Methods: Sixty elderly patients who underwent multiple intestinal polyps resection in Peking University Third Hospital from Janurary to May 2016 were randomly divided into dexmedetomidine group (D group, n=30) and propofol group (P group, n=30). There were 28 males and 32 females with a mean age of (70.4±4.5) years old (range: 65-80 years old)...
November 22, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27902610/mean-apnea-hypopnea-duration-but-not-apnea-hypopnea-index-is-associated-with-worse-hypertension-in-patients-with-obstructive-sleep-apnea
#4
Hao Wu, Xiaojun Zhan, Mengneng Zhao, Yongxiang Wei
To determine which polysomnography parameters are associated with severity of hypertension.This retrospective study collected data on all patients admitted to our urban, academic center in Beijing with hypertension who had undergone polysomnograms (PSG) and were diagnosed with obstructive sleep apnea (OSA) (apnea-hyponea index [AHI] ≥5/hour). We then compared polysomnographic parameters (AHI, oxygen desaturation index [ODI], lowest oxygen saturation [LOS], and mean apnea-hypopnea duration [MAD]) by hypertension severity in this cohort...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27899540/the-1-minute-sit-to-stand-test-in-adults-with-cystic-fibrosis-correlations-with-cardiopulmonary-exercise-test-6-minute-walk-test-and-quadriceps-strength
#5
Mathieu Gruet, Leonardo Alexandre Peyré-Tartaruga, Laurent Mely, Jean-Marc Vallier
BACKGROUND: Exercise testing is part of the regular assessment of patients with cystic fibrosis (CF). We aimed to evaluate (1) the convergent validity of the 1-min sit-to-stand (STS) test in CF by investigating its relationships with peak oxygen uptake (peak V̇O2 ), quadriceps strength, and quality of life and (2) to compare these associations with those of the 6-min walk test (6MWT). METHODS: Twenty-five adults with CF (FEV1 = 59 ± 24%) performed the STS test, the 6MWT, quadriceps strength assessment, and cardiopulmonary exercise test (CPET)...
December 2016: Respiratory Care
https://www.readbyqxmd.com/read/27896179/clinical-factors-associated-with-the-non-operative-airway-management-of-patients-with-robin-sequence
#6
Frank P Albino, Benjamin C Wood, Kevin D Han, Sojung Yi, Mitchel Seruya, Gary F Rogers, Albert K Oh
BACKGROUND: The indications for surgical airway management in patients with Robin sequence (RS) and severe airway obstruction have not been well defined. While certain patients with RS clearly require surgical airway intervention and other patients just as clearly can be managed with conservative measures alone, a significant proportion of patients with RS present with a more confusing and ambiguous clinical course. The purpose of this study was to describe the clinical features and objective findings of patients with RS whose airways were successfully managed without surgical intervention...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27893073/association-between-severity-of-obstructive-sleep-apnea-and-number-and-sites-of-upper-airway-operations-with-surgery-complications
#7
Zamzil Amin Asha'ari, Jamalludin Ab Rahman, Abdul Hadi Mohamed, Kahairi Abdullah, Wan Ishlah Leman
Importance: In patients with obstructive sleep apnea (OSA), operative risks depend on the severity of the underlying OSA and the invasiveness of the surgical procedure. Objective: To investigate the nature of the associations between the severity of OSA and the number and anatomical sites of upper airway operations with operative complications. Design, Setting, and Participants: This retrospective study included adult patients diagnosed with OSA (apnea-hypopnea index [AHI], >5) who underwent upper airway surgery at a single tertiary referral hospital between October 1, 2008, and October 1, 2015...
November 23, 2016: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27888506/rapid-and-safe-response-to-low-dose-carbamazepine-in-neonatal-epilepsy
#8
Tristan T Sands, Martina Balestri, Giulia Bellini, Sarah B Mulkey, Olivier Danhaive, Eliza Hayes Bakken, Maurizio Taglialatela, Michael S Oldham, Federico Vigevano, Gregory L Holmes, Maria Roberta Cilio
OBJECTIVE: To evaluate treatment responses in benign familial neonatal epilepsy (BFNE). METHODS: We recruited patients with BFNE through a multicenter international collaboration and reviewed electroclinical and genetic details, and treatment response. All patients were tested at minimum for mutations/deletions in the KCNQ2, KCNQ3, and SCN2A genes. RESULTS: Nineteen patients were included in this study. A family history of neonatal seizures was positive in 16 patients, and one additional patient had a family history of infantile seizures...
November 26, 2016: Epilepsia
https://www.readbyqxmd.com/read/27888413/improving-manual-oxygen-titration-in-preterm-infants-by-training-and-guideline-implementation
#9
Henriëtte A van Zanten, Steffen C Pauws, Evelien C Beks, Ben J Stenson, Enrico Lopriore, Arjan B Te Pas
: To study oxygen saturation (SpO2) targeting before and after training and guideline implementation of manual oxygen titration, two cohorts of preterm infants <30 weeks of gestation needing respiratory support and oxygen therapy were compared. The percentage of the time spent with SpO2 within the target range (85-95%) was calculated (%SpO2-wtr). SpO2 was collected every minute when oxygen is >21%. ABCs where oxygen therapy was given were identified and analyzed. After training and guideline implementation the %SpO2-wtr increased (median interquartile range (IQR)) 48...
November 26, 2016: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27885771/selective-gene-dosage-by-crispr-cas9-genome-editing-in-hexaploid-camelina-sativa
#10
Céline Morineau, Yannick Bellec, Frédérique Tellier, Lionel Gissot, Zsolt Kelemen, Fabien Nogué, Jean-Denis Faure
In many plant species, gene dosage is an important cause of phenotype variation. Selectively engineering gene dosage, particularly in polyploid genomes, would provide an efficient tool for plant breeding. The hexaploid oilseed crop Camelina sativa, which has three closely-related expressed sub-genomes, is an ideal species for investigation of the possibility of creating a large collection of combinatorial mutants. Selective, targeted mutagenesis of the three delta-12-desaturase (FAD2) genes was achieved by CRISPR-Cas9 gene editing, leading to reduced levels of polyunsaturated fatty acids and increased accumulation of oleic acid in the oil...
November 25, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27885537/safety-analysis-of-bariatric-patients-undergoing-outpatient-upper-endoscopy-with-non-anesthesia-administered-propofol-sedation
#11
Tyler McVay, John C Fang, Linda Taylor, Alexander Au, Wesley Williams, Angela P Presson, Ragheed Al-Dulaimi, Eric Volckmann, Anna Ibele
BACKGROUND: Non-anesthesia administered propofol (NAAP) has been shown to be a safe and effective method of sedation for patients undergoing gastrointestinal endoscopy. Bariatric surgery patients are potentially at a higher risk for sedation-related complications due to co-morbidities including obstructive sleep apnea. The outcomes of NAAP in bariatric patients have not been previously reported. METHODS: In this retrospective cohort study, severely obese patients undergoing pre-surgical outpatient esophagogastroduodenoscopy (EGD) were compared to non-obese control patients (BMI ≤ 25 kg/m(2)) undergoing diagnostic EGD at our institution from March 2011-September 2015 using our endoscopy database...
November 24, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27884421/interpreting-the-incremental-cardiopulmonary-exercise-test
#12
REVIEW
Samir Nusair
The incremental cardiopulmonary exercise test (CPET) is an increasingly used diagnostic method that serves to evaluate patients with chief complaint of dyspnea during exercise. Performing maximal symptom-limited CPET can show if the tested subject has a reduced exercise capacity and give clues to the mechanism of such exercise capacity reduction, cardiac, pulmonary, or pulmonary vascular source. In this review, it is suggested that the evaluation of the complex results of CPET should be performed by first determining if myocardial/circulatory insufficiency is present and second if there is gas exchange abnormality...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27884081/a-randomized-cross-over-study-comparing-the-efficacy-of-two-mandibular-advancement-appliances-in-the-treatment-of-mild-moderate-obstructive-sleep-apnea
#13
Ayman Al-Dharrab
OBJECTIVE: To compare efficacy, side effects, patient compliance, and preference between two types of custom-made mandibular advancement appliances (MAAs) in the treatment of patients with mild to moderate obstructive sleep apnea (OSA). METHODOLOGY: This prospective, randomized, crossover study of 12 patients with mild to moderate OSA compared a titratable and a non-titratable MAA. Each patient was fitted with both appliances in a random order with a washout period of two weeks...
November 24, 2016: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/27878796/patent-foramen-ovale-a-novel-cardiovascular-risk-factor-in-patients-with-sleep-disordered-breathing-and-high-altitude-dwellers
#14
Emrush Rexhai, Urs Scherrer, Stefano F Rimoldi
Diseases associated with chronic hypoxaemia are a leading cause of morbidity and mortality in Western countries. Epidemiological data indicate that cardiovascular diseases contribute substantially to this problem, but the underlying mechanisms are incompletely understood. Sleep disordered breathing and high altitude exposure are frequent conditions associated with hypoxaemia. Recent evidence suggests that in these conditions the concomitant presence of a patent foramen ovale plays an important pathogenic role...
2016: Swiss Medical Weekly
https://www.readbyqxmd.com/read/27878503/evaluation-of-different-near-infrared-spectroscopy-technologies-for-assessment-of-tissue-oxygen-saturation-during-a-vascular-occlusion-test
#15
Kevin Steenhaut, Koen Lapage, Thierry Bové, Stefan De Hert, Annelies Moerman
An increasing number of NIRS devices are used to provide measurements of peripheral tissue oxygen saturation (StO2). The aim of the present study is to test the hypothesis that despite technological differences between devices, similar trend values will be obtained during a vascular occlusion test. The devices compared are NIRO-200NX, which measures StO2 and oxyhemoglobin by spatially resolved spectroscopy and the Beer-Lambert law, respectively, and INVOS 5100C and Foresight Elite, which both measure StO2 with the Beer-Lambert law, enhanced with the spatial resolution technique...
November 22, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27877098/accidental-epidural-injection-of-rocuronium-in-a-pediatric-patient-a-case-report-and-literature-review
#16
Ting-Ting Wu, David S Hoff
Accidental administration of non-epidural drugs into the epidural or subarachnoid spaces may be associated with unexpected pain, morbidity, adverse effects, increased level of care, prolonged hospital stay, and mortality. We describe a 12-month-old admitted for secondary-stage hypospadias reconstruction. General anesthesia was induced with sevofiurane and a peripheral catheter was placed. Instead of ropivacaine, rocuronium (80 mg; 6.3 mg/kg) was injected into the epidural space by the caudal route. Surgery was uneventful and was completed 160 minutes after rocuronium was given...
September 2016: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
https://www.readbyqxmd.com/read/27876179/prevalence-and-risk-factors-of-peri-ictal-autonomic-changes-in-children-with-temporal-lobe-seizures
#17
Mark Whealy, Elaine Wirrell, Lily Wong-Kisiel, Katherine Nickels, Eric T Payne
BACKGROUND: We determined the prevalence of signs and symptoms of autonomic dysfunction in seizures of temporal lobe onset in children. METHODS: We evaluated the prevalence and risk factors of peri-ictal autonomic changes in temporal lobe onset seizures in children from a single-center pediatric epilepsy monitoring unit between June 1, 2009 and October 31, 2013. Age, gender, epilepsy etiology, current antiepileptic drug therapy, ictal electroencephalographic lateralization, brain magnetic resonance imaging results, and the presence of generalized tonic-clonic seizures over the preceding year were recorded from medical record review...
October 11, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27872941/-supraglottoplasty-for-pediatric-laryngomalacia-results-from-71-cases
#18
D Di Dio, P Amrhein, A Koitschev, C Sittel
Laryngomalacia is the most common cause of stridor in infants. The stridor is caused by an inward collapse of supraglottic structures during inspiration resulting in an inspiratory stridor. The exact etiology still remains unclear. The surgical procedure of choice for laryngomalacia is supraglottoplasty. From 2009 to 2016 a total of 71 children were treated by supraglottoplasty in the department for pediatric otorhinolaryngology of the Stuttgart Hospital. The indications for supraglottoplasty were laryngomalacia with severe inspiratory stridor, oxygen desaturation, suprasternal or chest retraction, feeding difficulties and/or failure to thrive...
December 2016: HNO
https://www.readbyqxmd.com/read/27871883/importance-of-phosphatidylcholine-on-the-chloroplast-surface
#19
REVIEW
Botella César, Jouhet Juliette, Maryse A Block
In plant cells, phosphatidylcholine (PC) is a major glycerolipid of most membranes but practically lacking from the plastid internal membranes. In chloroplasts, PC is absent from the thylakoids and the inner envelope membrane. It is however the main component of the outer envelope membrane, where it exclusively distributes in the outer monolayer. This unique distribution is likely related with operational compartmentalization of plant lipid metabolism. In this review, we summarize the different mechanisms involved in homeostasis of PC in plant cells...
November 18, 2016: Progress in Lipid Research
https://www.readbyqxmd.com/read/27871574/cerebral-oxygenation-in-the-beach-chair-position-for-shoulder-surgery-in-regional-anesthesia-impact-on-cerebral-blood-flow-and-neurobehavioral-outcome
#20
José A Aguirre, Olivia Märzendorfer, Muriel Brada, Andrea Saporito, Alain Borgeat, Philipp Bühler
STUDY OBJECTIVE: Beach chair position is considered a potential risk factor for central neurological events particularly if combined with low blood pressure. The aim of this study was to assess the impact of regional anesthesia on cerebral blood flow and neurobehavioral outcome. DESIGN: This is a prospective, assessor-blinded observational study evaluating patients in the beach chair position undergoing shoulder surgery under regional anesthesia. SETTING: University hospital operating room...
December 2016: Journal of Clinical Anesthesia
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