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https://www.readbyqxmd.com/read/27913053/intestinal-metaplasia-of-appendiceal-endometriosis-is-not-uncommon-and-may-mimic-appendiceal-mucinous-neoplasm
#1
Monika Vyas, Serena Wong, Xuchen Zhang
Endometriosis of the appendix can be an incidental finding or a cause of appendicitis, intussusception, perforation or retention mucocele. Intestinal metaplasia of appendiceal endometriosis may occur, which can lead to a misdiagnosis of low-grade appendiceal mucinous neoplasm. On a retrospective search of the pathology database from 2001 to 2015, we identified 78 appendiceal endometriosis cases and intestinal metaplasia was present in 10/78 (13%) cases. In most of the cases (90%), the foci of intestinal metaplasia were mainly localized close to the mucosa...
October 25, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/27911835/two-crystal-structures-reveal-design-for-repurposing-the-c-ala-domain-of-human-alars
#2
Litao Sun, Youngzee Song, David Blocquel, Xiang-Lei Yang, Paul Schimmel
The 20 aminoacyl tRNA synthetases (aaRSs) couple each amino acid to their cognate tRNAs. During evolution, 19 aaRSs expanded by acquiring novel noncatalytic appended domains, which are absent from bacteria and many lower eukaryotes but confer extracellular and nuclear functions in higher organisms. AlaRS is the single exception, with an appended C-terminal domain (C-Ala) that is conserved from prokaryotes to humans but with a wide sequence divergence. In human cells, C-Ala is also a splice variant of AlaRS...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911829/supramolecular-pegylation-of-biopharmaceuticals
#3
Matthew J Webber, Eric A Appel, Brittany Vinciguerra, Abel B Cortinas, Lavanya S Thapa, Siddharth Jhunjhunwala, Lyle Isaacs, Robert Langer, Daniel G Anderson
The covalent modification of therapeutic biomolecules has been broadly explored, leading to a number of clinically approved modified protein drugs. These modifications are typically intended to address challenges arising in biopharmaceutical practice by promoting improved stability and shelf life of therapeutic proteins in formulation, or modifying pharmacokinetics in the body. Toward these objectives, covalent modification with poly(ethylene glycol) (PEG) has been a common direction. Here, a platform approach to biopharmaceutical modification is described that relies on noncovalent, supramolecular host-guest interactions to endow proteins with prosthetic functionality...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27908462/a-rare-case-of-perforated-sub-hepatic-appendicitis-a-challenging-differential-diagnosis-of-acute-abdomen-based-on-the-combination-of-appendicitis-and-maldescent-of-the-caecum
#4
Costanza Chiapponi, Olof Jannasch, Manuela Petersen, Wiebke Lessel, Christiane Bruns, Frank Meyer
Unusual locations of the appendix vermiformis can result in delay in appropriate diagnosis and treatment of appendicitis. So an inflamed appendix in a sub-hepatic caecum caused by caecal maldescent for example can mimic cholecystitis, the pain being localized in the right upper quadrant. Here, we present a case of perforated sub-hepatic appendicitis with peritonitis, requiring open ileocaecal resection. Review of the existing literature has demonstrated that this pathology is uncommon, yet not so rare as one might presume...
November 21, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/27907821/total-small-bowel-herniation-through-the-space-between-the-connecting-tube-of-gastric-band-and-abdominal-wall-a-case-report-of-a-surgical-emergency
#5
Tarek Hashem, Soliman M Soliman, Sherif Wagih
INTRODUCTION: Laparoscopic adjustable gastric banding is one of the most frequently done procedures for morbid obesity. In most reported cases, the band itself is the cause of complications. There are only a few reports of morbidities caused by the connecting tube. This presentation describes a case of acute abdomen due to small bowel herniation between the connecting tube and the abdominal wall. This case report aims to remind clinicians of possible complications caused by the connecting tube of a gastric band...
November 17, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27906036/complicated-acute-appendicitis-presenting-as-a-rapidly-progressive-soft-tissue-infection-of-the-abdominal-wall-a-case-report
#6
Corinne Beerle, Hans Gelpke, Stefan Breitenstein, Ralph F Staerkle
BACKGROUND: We report a case of a rare complication of acute appendicitis with perforation through the abdominal wall. The case points out that an intraabdominal origin should be considered in patients presenting with rapidly spreading soft tissue infections of the trunk. CASE PRESENTATION: A 58-year-old European woman presented to our hospital with a 1-week history of severe abdominal pain accompanied by rapidly spreading erythema and emphysema of the lower abdomen...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27904092/development-and-biosensor-applications-of-novel-functional-electrodes
#7
Shigehiro Takahashi
 Phenylboronic acid (PBA) derivatives have been used as alternatives to enzymes in the development of sugar-sensitive systems because the optical and electrochemical properties of these derivatives are significantly modulated upon sugar binding. This article reviews the voltammetric properties of sugar sensors prepared using dithiobis (4-butyrylamino-m-phenylboronic acid) (DTBA-PBA)-modified electrodes and PBA-appended layer-by-layer film-modified electrodes. In addition, the redox properties of reduced graphene oxide (rGO)-modified glassy carbon electrodes (GCEs) are discussed...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27903891/cloning-independent-markerless-gene-editing-in-streptococcus-sanguinis-novel-insights-in-type-iv-pilus-biology
#8
Ishwori Gurung, Jamie-Lee Berry, Alexander M J Hall, Vladimir Pelicic
Streptococcus sanguinis, a naturally competent opportunistic human pathogen, is a Gram-positive workhorse for genomics. It has recently emerged as a model for the study of type IV pili (Tfp)-exceptionally widespread and important prokaryotic filaments. To enhance genetic manipulation of Streptococcus sanguinis, we have developed a cloning-independent methodology, which uses a counterselectable marker and allows sophisticated markerless gene editing in situ We illustrate the utility of this methodology by answering several questions regarding Tfp biology by (i) deleting single or mutiple genes, (ii) altering specific bases in genes of interest, and (iii) engineering genes to encode proteins with appended affinity tags...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27901133/the-macroscopic-wettable-surface-fabricated-by-calix-4-arene-based-host-guest-interaction-and-chiral-discrimination-of-glucose
#9
Yue Sun, Yuxiao Mei, Jiaxin Quan, Xuan Xiao, Lin Zhang, Demei Tian, Haibing Li
Herein, we reported a new strategy based on self-assembly chemistry for chiral discrimination of glucose on a new S-mandelic acid-appended calix[4]arene (S-MC4) modified nanostructure, which exhibits macroscopic chiral preference for d-glucose via contact angle measurements (CA). The proposed macroscopic chiral device displays rapidly remarkable specificity and is convenient to use, which should be suitable for diagnostic purposes, nanomedical applications, etc.
November 30, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27901132/ligand-density-quantification-on-colloidal-inorganic-nanoparticles
#10
REVIEW
Ashley M Smith, Kathryn A Johnston, Scott E Crawford, Lauren E Marbella, Jill E Millstone
Colloidal inorganic nanoparticles are being used in an increasingly large number of applications ranging from biological imaging to television displays. In all cases, nanoparticle surface chemistry can significantly impact particle physical properties, processing, and performance. The first step in leveraging this tunability is to develop analytical approaches to describe surface chemical features. Some of the most basic descriptors of particle surface chemistry include the quantity, identity, and arrangement of ligands appended to the particle core...
November 30, 2016: Analyst
https://www.readbyqxmd.com/read/27900628/lower-pre-peritoneal-steatonecrosis-mimicking-acute-appendicitis
#11
Carlos Augusto Gomes, Alice Piccinini, Felipe Couto Gomes, Camila Couto Gomes, Salomone Di Saverio
ᅟ.
November 29, 2016: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/27900512/a-highly-selective-fluorescent-chemosensor-for-zn-2-based-on-the-rhodamine-derivative-incorporating-coumarin-group
#12
Kun-Peng Wang, Zhi-Hui Jin, Hui-Shi Shang, Cheng-Dong Lv, Qi Zhang, Shaojin Chen, Zhi-Qiang Hu
A coumarin-appended rhodamine derivative was prepared by reacting rhodamine hydrazide and coumarin-3-carboxylic acid, which fluorescence sensing behavior toward Zn(2+) against other metal ions was investigated in CH3CN. Significantly, the rodamine-coumarin derivative exhibited highly selective and sensitive recognition toward Zn(2+) with a limit of detection (LOD) down to 10(-9) M. Upon addition of Zn(2+), remarkable fluorescent intensities enhanced and also clear color changed from colorless to pink. The Job's plot indicated the formation of 1:1 complex between the rhodamine-coumarin derivative and Zn(2+)...
November 29, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27900227/urachal-cyst-causing-small-bowel-obstruction-in-an-adult-with-a-virgin-abdomen
#13
Michael P O'Leary, Zane W Ashman, David S Plurad, Dennis Y Kim
Introduction. A patent urachus is a rare congenital or acquired pathology, which can lead to complications later in life. We describe a case of urachal cystitis as the etiology of small bowel obstruction in an adult without prior intra-abdominal surgery. Case Report. A 64-year-old male presented to the acute care surgery team with a 5-day history of right lower quadrant abdominal pain, distention, nausea, and vomiting. He had a two-month history of urinary retention and his past medical history was significant for benign prostate hyperplasia...
2016: Case Reports in Surgery
https://www.readbyqxmd.com/read/27899166/pain-management-of-acute-appendicitis-in-canadian-pediatric-emergency-departments
#14
Andrea L Robb, Samina Ali, Naveen Poonai, Graham C Thompson
OBJECTIVES: Children with suspected appendicitis are at risk for suboptimal pain management. We sought to describe pain management patterns for suspected appendicitis across Canadian pediatric emergency departments (PEDs). METHODS: A retrospective medical record review was undertaken at 12 Canadian PEDs. Children ages 3 to 17 years who were admitted to the hospital in February or October 2010 with suspected appendicitis were included. Patients were excluded if partially assessed or treated at another hospital...
November 30, 2016: CJEM
https://www.readbyqxmd.com/read/27896326/preoperative-diagnosis-of-amyand-s-hernia-by-ultrasound-and-computed-tomography
#15
Husam Vehbi, Cagri Agirgun, Ferda Agirgun, Yuksel Dogan
Inguinal hernia is the most common seen groin hernias which mostly contain bowel. The incidence of vermiform appendix in an inguinal hernia is seen in 1% of all inguinal hernia. This is known as Amyand's hernia. Appendix within a hernia can be normal or complicated by appendicitis. Most of these cases are not diagnosed preoperatively and managed during surgery. Preoperative diagnosis of these cases is so rare. Very few cases have been reported so far. In our case, we diagnosed an inflamed appendix in a 49 years old female within right inguinal hernia by using ultrasound and confirmed it by CT scan...
June 2016: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27894435/pediatric-appendicitis
#16
REVIEW
Rebecca M Rentea, Shawn D St Peter
Appendicitis is one of the most common surgical pathologies in children. It can present with right lower quadrant pain. Scoring systems in combination with selective imaging and surgical examination will diagnose most children with appendicitis. Clinical pathways should be used. Most surgical interventions for appendicitis are now almost exclusively laparoscopic, with trials demonstrating better outcomes for children who undergo index hospitalization appendectomies when perforated. Nonoperative management has a role in the treatment of both uncomplicated and complicated appendicitis...
February 2017: Surgical Clinics of North America
https://www.readbyqxmd.com/read/27891287/sapovirus-gastroenteritis-in-young-children-presenting-as-distal-small-bowel-obstruction-a-report-of-2-cases-and-literature-review
#17
Lynn Model, Cathy Anne Burnweit
Abdominal pain and distention in children are commonly encountered problems in the pediatric emergency room. The majority of complaints are found to be due to benign entities such as gastroenteritis and constipation. What confounds these diagnoses is that young children often deliver a challenging and unreliable exam. Thus, it often becomes exceedingly problematic to differentiate these benign conditions from surgical conditions requiring prompt attention including small or large bowel obstruction, volvulus, and appendicitis...
2016: Case Reports in Surgery
https://www.readbyqxmd.com/read/27890780/a-clinical-score-to-predict-appendicitis-in-older-male-children
#18
Anupam B Kharbanda, Michael C Monuteaux, Richard G Bachur, Nanette C Dudley, Lalit Bajaj, Michelle D Stevenson, Charles G Macias, Manoj K Mittal, Jonathan E Bennett, Kelly Sinclair, Peter S Dayan
OBJECTIVE: To develop a clinical score to predict appendicitis among older, male children who present to the emergency department (ED) with suspected appendicitis. METHODS: Patients with suspected appendicitis were prospectively recruited at 9 pediatric EDs. A total 2,625 patients enrolled; a subset of 961 males, age 8-18 were analyzed in this secondary analysis. Outcomes determined by pathology, operative reports and follow-up calls. Clinical and laboratory predictors with < 10% missing data and Kappa > 0...
November 24, 2016: Academic Pediatrics
https://www.readbyqxmd.com/read/27884613/appendectomy-in-patients-with-human-immunodeficiency-virus-not-as-bad-as-we-once-thought
#19
Michael C Smith, Paul J Chung, Yohannes C Constable, Matthew R Boylan, Antonio E Alfonso, Gainosuke Sugiyama
BACKGROUND: The number of patients living with human immunodeficiency virus and acquired immunodeficiency syndrome is growing due to advances in antiretroviral therapy. Existing literature on appendectomy within this patient population has been limited by small sample sizes. Therefore, we used a large, multiyear, nationwide database to study this topic comprehensively. METHODS: Using the Nationwide Inpatient Sample, we identified 338,805 patients between 2005 and 2012 who underwent laparoscopic or open appendectomy for acute appendicitis...
November 21, 2016: Surgery
https://www.readbyqxmd.com/read/27884453/a-call-for-a-standardized-definition-of-perforated-appendicitis
#20
Andrew P Rogers, Tiffany J Zens, Charles M Leys, Peter F Nichol, Daniel J Ostlie
BACKGROUND: Abscess rates have been reported to be as low as 1% and as high as 50% following perforated appendicitis (PA). This range may be because of lack of universal definition for PA. An evidence-based definition (EBD) is crucial for accurate wound classification, risk-stratification, and subsequent process optimization. ACS NSQIP-Pediatric guidelines do not specify a definition of PA. We hypothesize that reported postoperative abscess rates underrepresent true incidence, as they may include low-risk cases in final calculations...
October 27, 2016: Journal of Pediatric Surgery
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