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https://www.readbyqxmd.com/read/28437565/relaxed-ordered-subset-preconditioned-alternating-projection-algorithm-for-pet-reconstruction-with-automated-penalty-weight-selection
#1
C Ross Schmidtlein, Yizun Lin, Si Li, Andrzej Krol, Bradley J Beattie, John L Humm, Yuesheng Xu
PURPOSE: Performance of the preconditioned alternating projection algorithm (PAPA) using relaxed ordered subsets (ROS) with a non-smooth penalty function was investigated in positron emission tomography (PET). A higher order total variation (HOTV) regularizer was applied and a method for unsupervised selection of penalty weights based on the measured data is introduced. METHODS: A ROS version of PAPA with HOTV penalty (ROS-HOTV-PAPA) for PET image reconstruction was developed and implemented...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28434039/outcome-of-stoma-closure-in-babies-with-necrotising-enterocolitis-early-vs-late-closure
#2
Debasish Bijoykrishna Banerjee, Hasanthi Vithana, Shilpa Sharma, Thomas Tat Ming Tsang
Newborns undergoing surgery for necrotizing enterocolitis (NEC) often require a stoma. Currently, there is no consensus regarding the best time for stoma closure (SC). Our aim was to determine the outcomes of early versus late closure. METHODS: Retrospective analysis of patients who underwent SC following stoma formation for NEC between Jan 2009 and July 2015 was done. Early (EC) versus late closure (LC) was defined as less than 10 weeks versus at or after 10 weeks of stoma formation...
April 22, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28433732/the-clinical-significance-of-an-estimated-fetal-weight-below-the-10th-centile-a-comparison-of-outcomes-between-5th-versus-5th-9th-centile
#3
Malgorzata Mlynarczyk, Suneet P Chauhan, Hind A Baydoun, Catherine M Wilkes, Kimberly R Earhart, Yili Zhao, Christopher Goodier, Eugene Chang, Nicole M Lee Plenty, E Kaitlyn Mize, Michelle Owens, Shilpa Babbar, Dev Maulik, Emily DeFranco, David McKinney, Alfred Z Abuhamad
BACKGROUND: The association between small for gestational age (SGA; birth weight < 10(th) centile for gestational age) and neonatal morbidity is well established. Yet there is a paucity of data on the relationship between suspected SGA (sonographic estimated fetal weight <10(th) centile), at two thresholds and subsequent neonatal morbidity. OBJECTIVE: The objective of this study was to determine the relationship between sonographic estimated fetal weight (SEFW) < 5(th) centile versus 5-9(th) centile and neonatal morbidity...
April 19, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28431170/early-total-enteral-feeding-in-stable-very-low-birth-weight-infants-a-before-and-after-study
#4
Sushma Nangia, Amit Bishnoi, Ankita Goel, Piali Mandal, Soumya Tiwari, Arvind Saili
Background: Fear of necrotizing enterocolitis (NEC) has perpetuated delayed initiation and slow advancement of enteral feeding in very low birth weight (VLBW) infants with inherent risks of parenteral alimentation. The objective of this study was to assess effect of early total enteral feeding (ETEF) on day of achievement of full enteral feeds, feed intolerance, NEC and sepsis. Methods: In total, 208 stable VLBW neonates (28-34 weeks) admitted during 6 month periods of three consecutive years were enrolled...
April 18, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28428105/microcarcinoid-arising-in-patients-with-long-standing-ulcerative-colitis-histological-analysis
#5
Sachie Kanada, Akira Sugita, Tetuo Mikami, Kenichi Ohashi, Hiroyuki Hayashi
Some case reports of neuroendocrine tumors (NETs) and neuroendocrine carcinoma (NEC) associated with ulcerative colitis (UC) have been published. Most NET cases are small lesions corresponding to microcarcinoids (MCs). However, published case reports have presented findings of MCs as single-case reports. Thus, the frequency of MCs is still unclear. In this study, we described the clinical and morphological features of 14 cases of UC-associated MC and estimated the frequency of MC. Consecutive patients with UC who underwent complete removal of the large intestine were assessed, and 135 patients were selected...
April 17, 2017: Human Pathology
https://www.readbyqxmd.com/read/28422949/heparin-binding-egf-like-growth-factor-promotes-neuronal-nitric-oxide-synthase-expression-and-protects-the-enteric-nervous-system-after-necrotizing-enterocolitis
#6
Yu Zhou, Yijie Wang, Jacob Olson, Jixin Yang, Gail E Besner
BACKGROUND: Neonatal necrotizing enterocolitis (NEC) is associated with alterations of the ENS, with loss of neuronal nitric oxide synthase (nNOS) expressing neurons in the intestine. The aims of this study were to investigate the roles of heparin binding EGF-like growth factor (HB-EGF) in neural stem cell (NSC) differentiation, nNOS expression, and effects on ENS integrity during experimental NEC. METHODS: The effects of HB-EGF on NSC differentiation and nNOS production were determined using cultured enteric NSC...
April 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28422095/structure-and-variability-of-the-north-equatorial-current-undercurrent-from-mooring-measurements-at-130%C3%A2-e-in-the-western-pacific
#7
Linlin Zhang, Fu Jun Wang, Qingye Wang, Shijian Hu, Fan Wang, Dunxin Hu
The mean structure and variability of the North Equatorial Current/Undercurrent (NEC/NEUC) are investigated with one-year Acoustic Doppler Current Profilers measurements from 4 subsurface moorings deployed at 10.5°N, 13°N, 15.5°N, and 18°N along 130°E in the western Pacific. The strong westward flowing NEC ranges from the sea surface down to 400 m, and the mean zonal velocity of the NEC at 10.5°N is around -30 cm/s at the depth of 70 m. Eastward flowing NEUC jets are detected below the NEC at 10...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28416305/fracture-strength-of-endodontically-treated-teeth-with-different-access-cavity-designs
#8
Gianluca Plotino, Nicola Maria Grande, Almira Isufi, Pietro Ioppolo, Eugenio Pedullà, Rossella Bedini, Gianluca Gambarini, Luca Testarelli
INTRODUCTION: The purpose of this study was to compare in vitro the fracture strength of root-filled and restored teeth with traditional endodontic cavity (TEC), conservative endodontic cavity (CEC), or ultraconservative "ninja" endodontic cavity (NEC) access. METHODS: Extracted human intact maxillary and mandibular premolars and molars were selected and assigned to control (intact teeth), TEC, CEC, or NEC groups (n = 10/group/type). Teeth in the TEC group were prepared following the principles of traditional endodontic cavities...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28414098/cytosolic-calcium-mediates-rip1-rip3-complex-dependent-necroptosis-through-jnk-activation-and-mitochondrial-ros-production-in-human-colon-cancer-cells
#9
Wen Sun, Xiaxia Wu, Hongwei Gao, Jie Yu, Wenwen Zhao, Jin-Jian Lu, Jinhua Wang, Guanhua Du, Xiuping Chen
Necroptosis is a form of programmed necrosis mediated by signaling complexes with receptor-interacting protein 1 (RIP1) and RIP3 kinases as the main mediators. However, the underlying execution pathways of this phenomenon have yet to be elucidated in detail. In this study, a RIP1/RIP3 complex was formed in 2-methoxy-6-acetyl-7-methyljuglone (MAM)-treated HCT116 and HT29 colon cancer cells. With this formation, mitochondrial reactive oxygen species (ROS) levels increased, mitochondrial depolarization occurred, and ATP concentrations decreased...
April 14, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28410788/independence-of-gut-bacterial-content-and-neonatal-necrotizing-enterocolitis-severity
#10
Lauren K Barron, Barbara B Warner, Phillip I Tarr, William D Shannon, Elena Deych, Brad W Warner
INTRODUCTION: Necrotizing enterocolitis (NEC) is a common and devastating gastrointestinal disease of premature infants. NEC severity varies widely. Recent data have demonstrated a strong link between gut microbial dysbiosis and development of NEC. We tested the hypothesis that alterations in the gut microbiome at the time of diagnosis predict the severity of NEC. METHODS: We used prospectively collected fecal samples from very low birth weight infants who developed NEC, stratifying by NEC severity...
April 5, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28410573/risk-factors-for-necrotizing-enterocolitis-in-neonates-a-systematic-review-of-prognostic-studies
#11
Noor Samuels, Rob A van de Graaf, Rogier C J de Jonge, Irwin K M Reiss, Marijn J Vermeulen
BACKGROUND: Necrotizing enterocolitis (NEC) is a severe multifactorial disease in preterm neonates associated with high morbidity and mortality. Better insight into prognostic values of the many reported factors associated with NEC is needed to enable identification of neonates at risk for NEC. The aim was to systematically review the literature to identify independent risk factors for NEC from the literature. METHODS: Medline, Cochrane, Embase, Pubmed and Google Scholar were searched systematically for cohort studies reporting prognostic factors for NEC in neonates using multivariable analysis...
April 14, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28409756/standardized-slow-enteral-feeding-protocol-reduces-necrotizing-enterocolitis-in-micropremies
#12
S Viswanathan, R Merheb, Xintong Wen, M Collin, S Groh-Wargo
BACKGROUND: Compared to early enteral feeds, delayed introduction and slow enteral feeding advancement to reduce necrotizing enterocolitis (NEC) is not well studied in micropremies (<750g birth weight). METHODS: Pre-post case control study. Micropremies who followed a standardized slow enteral feeding (SSEF) protocol (September 2009 to March 2015) were compared with a similar group of historical controls (PreSSEF, January 2003 to July 2009). Enteral feeding withheld for first 10-14 days and advanced at <10 ml/kg/day in the SSEF group...
April 8, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28404014/incidence-and-enteral-feed-antecedents-of-severe-neonatal-necrotising-enterocolitis-across-neonatal-networks-in-england-2012-13-a-whole-population-surveillance-study
#13
Cheryl Battersby, Nick Longford, Sundhiya Mandalia, Kate Costeloe, Neena Modi
BACKGROUND: Necrotising enterocolitis is a neonatal gastrointestinal inflammatory disease with high mortality and severe morbidity. This disorder is growing in global relevance as birth rates and survival of babies with low gestational age improve. Population data are scant and pathogenesis is incompletely understood, but enteral feed exposures are believed to affect risk. We aimed to quantify the national incidence of severe necrotising enterocolitis, describe variation across neonatal networks, and investigate enteral feeding-related antecedents of severe necrotising enterocolitis...
January 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28399330/arginine-supplementation-for-prevention-of-necrotising-enterocolitis-in-preterm-infants
#14
REVIEW
Prakeshkumar S Shah, Vibhuti S Shah, Lauren E Kelly
BACKGROUND: Decreased concentration of nitric oxide has been proposed as one of the possible cellular mechanisms of necrotising enterocolitis (NEC). Arginine can act as a substrate for production of nitric oxide in the tissues, and arginine supplementation may help to prevent NEC. OBJECTIVES: To examine the effect of arginine supplementation (administered by any route) on the incidence of NEC in preterm neonates. To conduct subgroup analyses based on the dose of arginine and the gestational age of participants (≤ 32 weeks, > 32 weeks)...
April 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28396243/mechanical-force-mediated-pathological-cartilage-thinning-is-regulated-by-necroptosis-and-apoptosis
#15
C Zhang, S Lin, T Li, Y Jiang, Z Huang, J Wen, W Cheng, H Li
OBJECTIVE: This study aimed to identify the mechanisms underlying mandibular chondrocyte cell death and cartilage thinning in response to mechanical force. MATERIAL AND METHODS: An in vivo model (compressive mechanical force) and an in vitro model (TNF-α+cycloheximide) were used to induce mandibular chondrocyte necroptosis. Hematoxylin and eosin staining and transmission electron microscopy were used to assess histological and subcellular changes in mandibular chondrocyte...
April 7, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28395549/magnesium-sulfate-for-neuroprotection-in-the-setting-of-chorioamnionitis
#16
James M Edwards, Laura E Edwards, Geeta K Swamy, Chad A Grotegut
PURPOSE: We examined the effects of magnesium on premature neonatal outcomes complicated by chorioamnionitis. MATERIALS AND METHODS: We conducted a secondary analysis of data from the BEAM Trial, an RCT to determine if antenatal magnesium decreases the incidence of CP in preterm birth. We compared the effect of magnesium sulfate by the presence or absence of chorioamnionitis. Outcomes examined include CP, IVH, NEC, BPD, and assessments of mental and motor disability...
April 11, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28387645/evolution-of-the-hypoxia-sensitive-cells-involved-in-amniote-respiratory-reflexes
#17
Dorit Hockman, Alan J Burns, Gerhard Schlosser, Keith P Gates, Benjamin Jevans, Alessandro Mongera, Shannon Fisher, Gokhan Unlu, Ela W Knapik, Charles K Kaufman, Christian Mosimann, Leonard I Zon, Joseph J Lancman, P Duc S Dong, Heiko Lickert, Abigail S Tucker, Clare Vh Baker
The evolutionary origins of the hypoxia-sensitive cells that trigger amniote respiratory reflexes - carotid body glomus cells, and 'pulmonary neuroendocrine cells' (PNECs) - are obscure. Homology has been proposed between glomus cells, which are neural crest-derived, and the hypoxia-sensitive 'neuroepithelial cells' (NECs) of fish gills, whose embryonic origin is unknown. NECs have also been likened to PNECs, which differentiate in situ within lung airway epithelia. Using genetic lineage-tracing and neural crest-deficient mutants in zebrafish, and physical fate-mapping in frog and lamprey, we find that NECs are not neural crest-derived, but endoderm-derived, like PNECs, whose endodermal origin we confirm...
April 7, 2017: ELife
https://www.readbyqxmd.com/read/28381523/human-milk-oligosaccharide-composition-predicts-risk-of-necrotising-enterocolitis-in-preterm-infants
#18
Chloe A Autran, Benjamin P Kellman, Jae H Kim, Elizabeth Asztalos, Arlin B Blood, Erin C Hamilton Spence, Aloka L Patel, Jiayi Hou, Nathan E Lewis, Lars Bode
OBJECTIVE: Necrotising enterocolitis (NEC) is one of the most common and often fatal intestinal disorders in preterm infants. Markers to identify at-risk infants as well as therapies to prevent and treat NEC are limited and urgently needed. NEC incidence is significantly lower in breast-fed compared with formula-fed infants. Infant formula lacks human milk oligosaccharides (HMO), such as disialyllacto-N-tetraose (DSLNT), which prevents NEC in neonatal rats. However, it is unknown if DSLNT also protects human preterm infants...
April 5, 2017: Gut
https://www.readbyqxmd.com/read/28379923/serum-markers-of-necrotizing-enterocolitis-a-systematic-review
#19
Gianluca Terrin, Laura Stronati, Salvatore Cucchiara, Mario De Curtis
OBJECTIVE: To systematically review the diagnostic utility of serum biomarkers for the diagnosis of necrotizing enterocolitis (NEC). METHODS: We conducted an electronic and manual search of the available evidence. We included studies reporting data on the diagnostic accuracy of "serum" biomarkers for the diagnosis of NEC, available until January 2016. RESULTS: We selected 22 studies from the 1296 papers retrieved. Only S100 A8/A9 protein and apolipoprotein-CII showed high sensitivity (100% and 96...
April 5, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28378556/rna-seq-for-gene-expression-profiling-of-human-necrotizing-enterocolitis-a-pilot-study
#20
Kyuwhan Jung, Insong Koh, Jeong Hyun Kim, Hyun Sub Cheong, Taejin Park, So Hyun Nam, Soo Min Jung, Cherry Ann Sio, Su Yeong Kim, Euiseok Jung, Byoungkook Lee, Hye Rim Kim, Eun Shin, Sung Eun Jung, Chang Won Choi, Beyong Il Kim, Eunyoung Jung, Hyoung Doo Shin
Necrotizing enterocolitis (NEC) characterized by inflammatory intestinal necrosis is a major cause of mortality and morbidity in newborns. Deep RNA sequencing (RNA-Seq) has recently emerged as a powerful technology enabling better quantification of gene expression than microarrays with a lower background signal. A total of 10 transcriptomes from 5 pairs of NEC lesions and adjacent normal tissues obtained from preterm infants with NEC were analyzed. As a result, a total of 65 genes (57 down-regulated and 8 up-regulated) revealed significantly different expression levels in the NEC lesion compared to the adjacent normal region, based on a significance at fold change ≥ 1...
May 2017: Journal of Korean Medical Science
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