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https://www.readbyqxmd.com/read/28528336/racial-and-ethnic-differences-in-mortality-associated-with-serum-potassium-in-a-large-hemodialysis-cohort
#1
Taehee Kim, Connie M Rhee, Elani Streja, Melissa Soohoo, Yoshitsugu Obi, Jason A Chou, Amanda R Tortorici, Vanessa A Ravel, Csaba P Kovesdy, Kamyar Kalantar-Zadeh
BACKGROUND: Hyperkalemia is observed in chronic kidney disease patients and may be a risk factor for life-threatening arrhythmias and death. Race/ethnicity may be important modifiers of the potassium-mortality relationship in maintenance hemodialysis (MHD) patients given that potassium intake and excretion vary among minorities. METHODS: We examined racial/ethnic differences in baseline serum potassium levels and all-cause and cardiovascular mortality using Cox proportional hazard models and restricted cubic splines in a cohort of 102,241 incident MHD patients...
May 20, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28513813/hepatitis-b-virus-reactivation-after-effective-sofosbuvir-and-ribavirin-treatment-in-a-patient-with-occult-hepatitis-b-virus-infection
#2
Silvia Odolini, Paola Lanza, Angiola Angiola, Serena Zaltron, Lucia Urbinati, Andrea Vavassori, Paola Nasta, Elena Festa, Franco Gargiulo, Anna Rodella, Arnaldo Caruso, Salvatore Casari, Francesco Castelli, Mauro Viganò
Reactivation of the hepatitis B virus (HBV) has been reported in patients with occult infection (OBI), i.e. HBV surface antigen (HBsAg) negative, HBV core antibody (anti-HBc) positive ± antibodies against HBsAg (anti-HBs) and detectable HBV DNA in serum or liver, receiving immunosuppressive or cytotoxic therapies. Recently, concerns have been raised regarding the risk of HBV reactivation in OBI patients treated with direct acting antiviral agents (DAAs) for chronic hepatitis C (CHC). Here we describe a case of HBV reactivation in a 72-year-old woman with OBI as a possible consequence of effective treatment with sofosbuvir (SOF) and ribavirin (Rbv) for genotype 2a/2c CHC...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28510201/ultramafic-geoecology-of-south-and-southeast-asia
#3
REVIEW
M L Galey, A van der Ent, M C M Iqbal, N Rajakaruna
Globally, ultramafic outcrops are renowned for hosting floras with high levels of endemism, including plants with specialised adaptations such as nickel or manganese hyperaccumulation. Soils derived from ultramafic regoliths are generally nutrient-deficient, have major cation imbalances, and have concomitant high concentrations of potentially phytotoxic trace elements, especially nickel. The South and Southeast Asian region has the largest surface occurrences of ultramafic regoliths in the world, but the geoecology of these outcrops is still poorly studied despite severe conservation threats...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28504677/%C3%AE-lactone-formation-during-product-release-from-a-nonribosomal-peptide-synthetase
#4
Jason E Schaffer, Margaret R Reck, Neha K Prasad, Timothy A Wencewicz
Nonribosomal peptide synthetases (NRPSs) are multidomain modular biosynthetic assembly lines that polymerize amino acids into a myriad of biologically active nonribosomal peptides (NRPs). NRPS thioesterase (TE) domains employ diverse release strategies for off-loading thioester-tethered polymeric peptides from termination modules typically via hydrolysis, aminolysis, or cyclization to provide mature antibiotics as carboxylic acids/esters, amides, and lactams/lactones, respectively. Here we report the enzyme-catalyzed formation of a highly strained β-lactone ring during TE-mediated cyclization of a β-hydroxythioester to release the antibiotic obafluorin (Obi) from an NRPS assembly line...
May 15, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28500287/determination-of-nasal-and-oropharyngeal-microbiomes-in-a-multicenter-population-based-study-findings-from-pretest-1-of-the-german-national-cohort
#5
Manas K Akmatov, Nadine Koch, Marius Vital, Wolfgang Ahrens, Dieter Flesch-Janys, Julia Fricke, Anja Gatzemeier, Halina Greiser, Kathrin Günther, Thomas Illig, Rudolf Kaaks, Bastian Krone, Andrea Kühn, Jakob Linseisen, Christine Meisinger, Karin Michels, Susanne Moebus, Alexandra Nieters, Nadia Obi, Anja Schultze, Julia Six-Merker, Dietmar H Pieper, Frank Pessler
We examined acceptability, preference and feasibility of collecting nasal and oropharyngeal swabs, followed by microbiome analysis, in a population-based study with 524 participants. Anterior nasal and oropharyngeal swabs were collected by certified personnel. In addition, participants self-collected nasal swabs at home four weeks later. Four swab types were compared regarding (1) participants' satisfaction and acceptance and (2) detection of microbial community structures based on deep sequencing of the 16 S rRNA gene V1-V2 variable regions...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28498186/using-small-tests-of-change-to-improve-pmtct-services-in-northern-nigeria-experiences-from-implementation-of-a-continuous-quality-improvement-and-breakthrough-series-program
#6
Bamidele Osibo, Frank Oronsaye, Oluwafemi D Alo, Abimbola Phillips, Renaud Becquet, Nathan Shaffer, Francis Ogirima, Collins Imarhiagbe, Bernice Ameh, Obioma Ezebuka, Sodzi Sodzi-Tettey, Adaobi Obi, Olusegun T Afolabi, Abutu Inedu, Chukwuma Anyaike, Bolanle Oyeledun
BACKGROUND: Continuous Quality Improvement (CQI) is a process where health teams systematically collect and regularly reflect on local data to inform decisions and modify local practices and so improve delivery of services. We implemented a cluster randomized trial to examine the effects of CQI interventions on Prevention of Mother-to-Child Transmission (PMTCT) services. Here, we report our experiences and challenges establishing CQI in 2 high HIV prevalence states in northern Nigeria...
June 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28498185/the-effect-of-a-continuous-quality-improvement-intervention-on-retention-in-care-at-6-months-postpartum-in-a-pmtct-program-in-northern-nigeria-results-of-a-cluster-randomized-controlled-study
#7
Bolanle Oyeledun, Abimbola Phillips, Frank Oronsaye, Oluwafemi David Alo, Nathan Shaffer, Bamidele Osibo, Collins Imarhiagbe, Francis Ogirima, Abiola Ajibola, Obioma Ezebuka, Bebia Ojong-Etta, Adaobi Obi, John Falade, Adunbi Kareem Uthman, Busuyi Famuyide, Deborah Odoh, Renaud Becquet
BACKGROUND: Retention in care is critical for improving HIV-infected maternal outcomes and reducing vertical transmission. Health systems' interventions such as continuous quality improvement (CQI) may support health services to address factors that affect the delivery of HIV-related care and thereby influence rates of retention-in-care. METHODOLOGY: We evaluated the effect of a CQI intervention on retention-in-care at 6 months postpartum of pregnant women and mothers living with HIV who had been started on lifelong antiretroviral treatment...
June 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28490436/longitudinal-associations-among-renal-urea-clearance-corrected-normalized-protein-catabolic-rate-serum-albumin-and-mortality-in-patients-on-hemodialysis
#8
Rieko Eriguchi, Yoshitsugu Obi, Elani Streja, Amanda R Tortorici, Connie M Rhee, Melissa Soohoo, Taehee Kim, Csaba P Kovesdy, Kamyar Kalantar-Zadeh
BACKGROUND AND OBJECTIVES: There are inconsistent reports on the association of dietary protein intake with serum albumin and outcomes among patients on hemodialysis. Using a new normalized protein catabolic rate (nPCR) variable accounting for residual renal urea clearance, we hypothesized that higher baseline nPCR and rise in nPCR would be associated with higher serum albumin and better survival among incident hemodialysis patients. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: Among 36,757 incident hemodialysis patients in a large United States dialysis organization, we examined baseline and change in renal urea clearance-corrected nPCR as a protein intake surrogate and modeled their associations with serum albumin and mortality over 5 years (1/2007-12/2011)...
May 10, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28487345/association-of-parameters-of-mineral-bone-disorder-with-mortality-in-patients-on-hemodialysis-according-to-level-of-residual-kidney-function
#9
Mengjing Wang, Yoshitsugu Obi, Elani Streja, Connie M Rhee, Wei Ling Lau, Jing Chen, Chuanming Hao, Takayuki Hamano, Csaba P Kovesdy, Kamyar Kalantar-Zadeh
BACKGROUND AND OBJECTIVES: The relationship between mineral and bone disorders and survival according to residual kidney function status has not been previously studied in patients on hemodialysis. We hypothesized that residual kidney function, defined by renal urea clearance, modifies the association between mineral and bone disorder parameters and mortality. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: The associations of serum phosphorus, albumin-corrected calcium, intact parathyroid hormone, and alkaline phosphatase with all-cause mortality were examined across three strata (<1...
May 9, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28487103/the-high-risk-polytrauma-patient-and-inferior-vena-cava-filter-use
#10
Onur Berber, Aswin Vasireddy, Obi Nzeako, Adel Tavakkolizadeh
OBJECTIVES: The aim of this study was to assess the impact on practice of vena cava filter insertion guidelines (Eastern Association for the Surgery of Trauma: practice management guidelines). DESIGN: The study was performed at a level 1 trauma centre with data from the 'Trauma Audit and Research Network' cross-referenced to hospital data. RESULTS: A total of 1138 specific 'high-risk' major trauma patients were identified over a 6-year period...
April 20, 2017: Injury
https://www.readbyqxmd.com/read/28444336/intradialytic-hypotension-blood-pressure-changes-and-mortality-risk-in-incident-hemodialysis-patients
#11
Jason A Chou, Elani Streja, Danh V Nguyen, Connie M Rhee, Yoshitsugu Obi, Jula K Inrig, Alpesh Amin, Csaba P Kovesdy, John J Sim, Kamyar Kalantar-Zadeh
Background.: Intradialytic hypotension (IDH) occurs frequently in maintenance hemodialysis (HD) patients and may be associated with higher mortality. We hypothesize that nadir intradialytic systolic blood pressure (niSBP) is inversely related to death risk while iSBP change (Δ) and IDH frequency are incrementally associated with all-cause mortality. Methods.: In a US-based cohort of 112 013 incident HD patients over a 5-year period (2007-11), using niSBP, ΔiSBP (pre-HD SBP minus niSBP) and IDH frequency (proportion of HD treatments with niSBP <90 mmHg) within the first 91 days of HD, we examined mortality-predictability at 1, 2 and 5 years using Cox models and restricted cubic splines adjusted for case-mix, comorbidities and laboratory covariates...
April 21, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28434888/melorheostosis-exome-sequencing-of-an-associated-dermatosis-implicates-postzygotic-mosaicism-of-mutated-kras
#12
Michael P Whyte, Malachi Griffith, Lee Trani, Steven Mumm, Gary S Gottesman, William H McAlister, Kilannin Krysiak, Robert Lesurf, Zachary L Skidmore, Katie M Campbell, Ilana S Rosman, Susan Bayliss, Vinieth N Bijanki, Angela Nenninger, Brian A Van Tine, Obi L Griffith, Elaine R Mardis
Melorheostosis (MEL) is the rare sporadic dysostosis characterized by monostotic or polyostotic osteosclerosis and hyperostosis often distributed in a sclerotomal pattern. The prevailing hypothesis for MEL invokes postzygotic mosaicism. Sometimes scleroderma-like skin changes, considered a representation of the pathogenetic process of MEL, overlie the bony changes, and sometimes MEL becomes malignant. Osteopoikilosis (OPK) is the autosomal dominant skeletal dysplasia that features symmetrically distributed punctate osteosclerosis due to heterozygous loss-of-function mutation within LEMD3...
April 21, 2017: Bone
https://www.readbyqxmd.com/read/28428474/evaluation-of-absorbed-dose-for-cbct-in-image-guided-radiation-therapy-comparison-of-each-devices-and-facilities
#13
Yumiko Kitazato, Noriyuki Kuga, Katsutoshi Shirieda, Masahiro Enzaki, Yuji Nakaguchi, Yoshinobu Shimohigashi, Toshihisa Kawasaki, Masahiko Toyoda, Daisuke Kawahara, Fujio Araki, Shinji Kawamura
Recently, intensity-modulated radiation therapy (IMRT) is used worldwide, highly accurate verification of the location using image-guided radiation therapy (IGRT) has become critical. However, the use of cone-beam computed tomography (CBCT) to ascertain the location each time raises concerns about its influence on radiotherapy dosage and increased radiation exposure. The purpose of this study was to measure the absorbed dose using nine kilovoltage (kV) devices and two megavoltage (MV) devices (total 11 devices) at eight facilities, compare the absorbed dose among the devices, and assess the characteristics of the respective devices to ensure optimal clinical operation...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28422393/accuracy-and-response-time-of-dual-biomarker-model-of-insulin-like-growth-factor-binding-protein-1-alpha-fetoprotein-amnioquick-duo-in-comparison-to-placental-alpha-microglobulin-1-test-in-diagnosis-of-premature-rupture-of-membranes
#14
George Uchenna Eleje, Euzebus Chinonye Ezugwu, Ahizechukwu Chigoziem Eke, Joseph Ifeanyichukwu Ikechebelu, Chukwuemeka Okwudili Ezeama, Ifeanyichukwu Uzoma Ezebialu, Nnabuike Okechukwu Ojiegbe, Chukwudi Celestine Obiora, Charles Ikechukwu Okafor, Gerald Okanandu Udigwe, Betrand Obi Nwosu, Frank O Ezugwu
AIM: The aim of this study was to determine accuracy and response time of duo of insulin-like growth factor binding protein-1 (IGFBP-1)/alpha-fetoprotein (Amnioquick duo+) versus placental alpha-microglobulin-1 (PAMG-1) in diagnosing premature rupture of membranes (PROM). METHODS: A multicenter prospective study was conducted among women with features suggestive of PROM between 24 and 42 gestational weeks (GW). PROM was confirmed post-delivery based on presence of any two of these criteria: delivery within 48 h to 7 days, chorioamnionitis, membranes overtly ruptured at delivery, and adverse perinatal outcomes strongly correlated with prolonged PROM...
April 19, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28421638/renal-replacement-therapy-and-incremental-hemodialysis-for-veterans-with-advanced-chronic-kidney-disease
#15
Kamyar Kalantar-Zadeh, Susan T Crowley, Srinivasan Beddhu, Joline L T Chen, John T Daugirdas, David S Goldfarb, Anna Jin, Csaba P Kovesdy, David J Leehey, Hamid Moradi, Sankar D Navaneethan, Keith C Norris, Yoshitsugu Obi, Ann O'Hare, Tariq Shafi, Elani Streja, Mark L Unruh, Tushar J Vachharajani, Steven Weisbord, Connie M Rhee
Each year approximately 13,000 Veterans transition to maintenance dialysis, mostly in the traditional form of thrice-weekly hemodialysis from the start. Among >6000 dialysis units nationwide, there are currently approximately 70 Veterans Affairs (VA) dialysis centers. Given this number of VA dialysis centers and their limited capacity, only 10% of all incident dialysis Veterans initiate treatment in a VA center. Evidence suggests that, among Veterans, the receipt of care within the VA system is associated with favorable outcomes, potentially because of the enhanced access to healthcare resources...
May 2017: Seminars in Dialysis
https://www.readbyqxmd.com/read/28419850/overpressure-blast-injury-induced-oxidative-stress-and-neuroinflammation-response-in-rat-frontal-cortex-and-cerebellum
#16
Hale Z Toklu, Zhihui Yang, Sehkar Oktay, Yasemin Sakarya, Nataliya Kirichenko, Michael K Matheny, Judy Muller-Delp, Kevin Strang, Philip J Scarpace, Kevin K W Wang, Nihal Tümer
BACKGROUND & AIM: Overpressure blast-wave induced brain injury (OBI) and its long-term neurological outcome pose significant concerns for military personnel. Our aim is to investigate the mechanism of injury due to OBI. METHODS: Rats were divided into 3 groups: (1) Control, (2) OBI (exposed 30psi peak pressure, 2-2.5ms), (3) Repeated OBI (r-OBI) (three exposures over one-week period). Lung and brain (cortex and cerebellum) tissues were collected at 24h post injury...
April 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28411716/pathophysiology-of-varicose-veins
#17
Benjamin N Jacobs, Elizabeth A Andraska, Andrea T Obi, Thomas W Wakefield
BACKGROUND: Varicose veins, a common problem with effects on quality of life, account for a significant cost burden on the health care system. Despite their prevalence, the pathophysiologic mechanism of varicose veins remains incompletely understood. The fundamental issue is whether venous hypertension and valvular incompetence precede and influence the development of vein wall changes or whether the reverse is true. METHODS: We have reviewed the English-language literature to provide the most current understanding of the hemodynamic and cellular and molecular processes that underlie the development of varicose veins...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28411696/first-10-month-results-of-the-vascular-quality-initiative-varicose-vein-registry
#18
Andrea T Obi, Danielle C Sutzko, Jose I Almeida, Lowell Kabnick, Jack L Cronenwett, Nicholas H Osborne, Brajesh K Lal, Thomas W Wakefield
OBJECTIVE: The Vascular Quality Initiative Varicose Vein Registry (VQI VVR) represents a new Patient Safety Organization database launched in January 2015 as a collaborative effort between the American Venous Forum and the Society for Vascular Surgery. This study was undertaken to identify real-world trends among treatment choices and outcomes of varicose vein patients. METHODS: Registry data prospectively captured anatomic, procedural, and outcome data for patients with C2 or more severe disease undergoing intervention for venous varicosities from January to November 2015...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28411075/effect-of-gender-and-adiposity-on-in%C3%A2-vivo-vascular-function-in-young-african-americans
#19
Namrata Dass, Sindhu Kilakkathi, Brittaney Obi, Andrea Moosreiner, Shanthi Krishnaswami, Michael E Widlansky, Srividya Kidambi
The relationship between obesity and high blood pressure is not as strong among African Americans (AA) as compared to Caucasians. We designed the current study to determine the effect of adiposity on vascular endothelial function (a harbinger of hypertension) among young healthy AA without additional cardiovascular disease risk factors. A total of 108 AA subjects (46 women) between the ages of 18 and 45 years were recruited. All the subjects were normotensive, nonsmokers, and normoglycemic. Anthropometric and cardiovascular disease risk factor measurements (lipid, insulin resistance, and inflammatory markers) were obtained...
March 14, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28401424/hospital-acquired-conditions-are-associated-with-worse-outcomes-in-crohn-s-disease-related-hospitalizations
#20
Kenneth Obi, Alice Hinton, Lindsay Sobotka, Edward Levine, Darwin Conwell, Cheng Zhang
BACKGROUND: Crohn's disease (CD) is a chronically relapsing condition that frequently requires hospitalization. In 2008, the Centers for Medicare and Medicaid Services selected ten conditions that were deemed healthcare-acquired conditions (HACs). Costs related to HACs are not reimbursed as they are considered to be preventable. AIM: To determine the prevalence and impact of HACs on hospital outcomes of hospitalized CD patients. METHODS: This was a cross-sectional study using data from the Nationwide Inpatient Sample between 2007 and 2011 with an extended time frame between 2002 and 2013 to specifically evaluate the prevalence of HACs...
April 11, 2017: Digestive Diseases and Sciences
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