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https://www.readbyqxmd.com/read/29222653/ultrasensitive-colorimetric-detection-of-nf-%C3%AE%C2%BAb-protein-at-picomolar-levels-using-target-induced-passivation-of-nanoparticles
#1
P Abdul Rasheed, Jae-Seung Lee
We developed a highly sensitive and selective sensor based on the nanoprobe conjugates of catalytic nanoparticles and double-stranded DNA (dsDNA) for the colorimetric detection of NF-κB protein. The sensing mechanism takes advantage of the catalytic activity of nanoparticle surfaces and the specific binding of NF-κB to a dsDNA sequence. In the presence of NF-κB, the highly selective interactions between dsDNA and NF-κB lead to the passivation of the catalytic nanoparticle surfaces, impeding the sodium borohydride-mediated reduction rate of 4-nitrophenol...
December 9, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29218658/hypopharyngeal-multichannel-intraluminal-impedance-leads-to-the-promising-outcome-of-antireflux-surgery-in-japanese-population-with-laryngopharyngeal-reflux-symptoms
#2
Takeshi Suzuki, Yosuke Seki, Yoshitaka Okamoto, Toshitaka Hoppo
BACKGROUND: Clinical characteristics of laryngopharyngeal reflux (LPR) in Japanese population remain unclear, and its treatment outcome is suboptimal. The objectives of this study were to evaluate Japanese patients with LPR symptoms using hypopharyngeal multichannel intraluminal impedance (HMII) and to assess the outcome of antireflux surgery (ARS). METHODS: Subjects included patients who had LPR symptoms for > 12 weeks or laryngoscopic findings suggestive of LPR and underwent laryngoscopy and esophageal testing including HMII...
December 7, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29217113/simultaneous-determination-of-borate-chloride-and-molybdate-in-pyrohydrolysis-distillates-of-plant-and-soil-samples-by-ion-chromatography
#3
Vivekchandra Guruprasad Mishra, Mrinal Kanti Das, Dipti Jayesh Shah, Subbiah Jeyakumar, Bhupendra Singh Tomar, Karanam Lakshminarayana Ramakumar
Determination of concentrations of micronutrients in plant samples is important in order to assess the growth and quality of plants. An ion chromatography (IC) method was developed for the simultaneous determination of B, Cl and Mo (micronutrients present in their anionic form in aqueous samples) using a gradient elution with d-mannitol and NaOH. Despite their different chemical nature, these elements could be separated from the matrix by employing pyrohydrolysis. IC was employed for their sequential determination from single aliquot injection into the IC column...
December 4, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29208252/sporadic-fundic-gland-polyps-and-gastric-acid-suppression-level
#4
Mohamed Khalaf, Andrew S Brock, Donald Castell
BACKGROUND: Fundic gland polyps (FGPs) are a common endoscopic finding and are known to be associated with proton pump inhibitors (PPIs) use. It is not known if their prevalence is affected by gastric acidity levels. This study aimed to assess whether there is a correlation between FGPs and gastric acidity levels as identified on 24-hour ambulatory impedance-pH studies in patients on PPI therapy. METHODS: We performed a review of 402 consecutive patients who take at least once daily PPI and underwent esophagogastroduodenoscopy with combined impedance-pH studies in the same setting (time and place) between January 2010 and December 2014...
December 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/29207214/feed-thickener-for-infants-up-to-six-months-of-age-with-gastro-oesophageal-reflux
#5
REVIEW
T'ng Chang Kwok, Shalini Ojha, Jon Dorling
BACKGROUND: Gastro-oesophageal reflux (GOR) is common in infants, and feed thickeners are often used to manage it in infants as they are simple to use and perceived to be harmless. However, conflicting evidence exists to support the use of feed thickeners. OBJECTIVES: To evaluate the use of feed thickeners in infants up to six months of age with GOR in terms of reduction in a) signs and symptoms of GOR, b) reflux episodes on pH probe monitoring or intraluminal impedance or a combination of both, or c) histological evidence of oesophagitis...
December 5, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29203406/acid-and-nonacid-gastroesophageal-reflux-after-single-anastomosis-gastric-bypass-an-objective-assessment-using-24-hour-multichannel-intraluminal-impedance-ph-metry
#6
Georgia Doulami, Stamatina Triantafyllou, Konstantinos Albanopoulos, Maria Natoudi, Georgios Zografos, Dimitrios Theodorou
BACKGROUND: Single anastomosis gastric bypass (SaGB) was introduced in 2001 as an alternative to "loop" gastric bypass. It was considered as a procedure that would eliminate alkaline reflux and associated esophagitis. OBJECTIVES: Existing evidence about the postoperative incidence of gastroesophageal reflux (GERD) after SaGB is based on studies using symptom questionnaires. The aim of our study was to evaluate GERD 12 months after SaGB by using 24-hour multichannel intraluminal impedance pH metry (24-h MIIpH)...
October 26, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/29201791/psychological-results-of-438-patients-with-persisting-gastroesophageal-reflux-disease-symptoms-by-symptom-checklist-90-revised-questionnaire
#7
Xia Chen, Ping Li, Fei Wang, Guozhong Ji, Lin Miao, Sihong You
Aims and objectives: Gastroesophageal reflux disease (GERD) affects mental state and social activities. On the contrary, mental disorders may also play a crucial role in GERD symptoms. The purpose of the study was to analyze the data of Symptom Checklist 90-Revised (SCL-90-R) questionnaire from patients with persisting GERD and to explore the impact of psychological factors on them. Materials and methods: The patients accepted SCL-90-R questionnaire survey, following endoscopy, high-resolution manometry (HRM), and ambulatory impedance-pH monitoring...
July 2017: Euroasian Journal of Hepato-Gastroenterology
https://www.readbyqxmd.com/read/29199161/indications-of-24-h-esophageal-ph-monitoring-capsule-ph-monitoring-combined-ph-monitoring-with-multichannel-impedance-esophageal-manometry-radiology-and-scintigraphy-in-gastroesophageal-reflux-disease
#8
Rukiye Vardar, Muharrem Keskin
Ambulatory esophageal pH monitoring is an essential method in patients exhibiting signs of non-erosive reflux disease (NERD) to make an objective diagnosis. Intra-esophageal pH monitoring is important in patients who are non-responsive to medications and in those with extraesophageal symptoms, particularly in NERD, before surgical interventions. With the help of the wireless capsule pH monitoring, measurements can be made under more physiological conditions as well as longer recordings can be performed because the investigation can be better tolerated by patients...
December 2017: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29193844/sodium-bicarbonate-gelled-chitosan-beads-as-mechanically-stable-carriers-for-the-covalent-immobilization-of-enzymes
#9
Marwa I Wahba
The poor mechanical stability of chitosan has long impeded its industrial utilization as an immobilization carrier. In this study, the mechanical properties of chitosan beads were greatly improved through utilizing the slow rate of the sodium bicarbonate-induced chitosan gelation and combining it with the chemical cross-linking action of glutaraldehyde (GA). The GA-treated sodium bicarbonate-gelled chitosan beads exhibited much better mechanical properties and up to 2.45-fold higher observed activity of the immobilized enzyme (β-D-galactosidase (β-gal)) when compared to the GA-treated sodium tripolyphosphate (TPP)-gelled chitosan beads...
November 29, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/29191423/an-electrochemical-nitric-oxide-biosensor-based-on-immobilized-cytochrome-c-on-a-chitosan-gold-nanocomposite-modified-gold-electrode
#10
Ehsan Pashai, Ghasem Najafpour Darzi, Mohsen Jahanshahi, Fatemeh Yazdian, Mostafa Rahimnejad
Goldnanoparticle (AuNPs), chitosan (CS), cytochrome c (Cyt c) and Nafion were immobilized on the surface of a gold electrode to form a Nafion/Cyt c/CS-3-Mercaptopropionic acid (MPA)-AuNPs/cysteamine-MPA (SAMs)-Au electrode. The CS-MPA-AuNPs nanocomposite was characterized by UV-vis spectroscopy. Electrochemical behavior of modified electrode was analyzed by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and chronoamperometry. Uv-vis results showed that CS-MPA-AuNPs nanocomposite could improve electron transfer between Cyt c and electrode surface and keep the catalytic activity of Cyt c...
November 27, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29182926/poly-dopamine-quinone-chromium-iii-complex-microspheres-as-new-modifier-for-simultaneous-determination-of-phenolic-compounds
#11
M Shahbakhsh, M Noroozifar
In this study, poly(dopamine-quinone chromium (III))-microspheres (PDQCM) were used for the modification of graphite paste electrode (GPE) for simultaneous voltammetric determination of 4-Amino Phenol (AP), Phenol (Ph) and 4-Nitro Phenol (NP). The PDQCM and the GPE modified with PDQCM were characterized by field emission scanning electron microscopy, Energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, electrochemical impedance spectroscopy and electrochemistry methods such as cyclic voltammetry (CV) and differential pulse voltammetry (DPV)...
November 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29177550/how-to-care-for-patients-with-ea-tef-the-known-and-the-unknown
#12
REVIEW
Hayat Mousa, Usha Krishnan, Maheen Hassan, Luigi Dall'Oglio, Rachel Rosen, Frédéric Gottrand, Christophe Faure
PURPOSE OF REVIEW: Guidelines were recently published highlighting why esophageal atresia (EA) patients are prone to complication risks, and the need for long-term follow-up. In this review, we will focus on how to investigate and treat potential complications, as well as the pros and cons of different investigative and treatment modalities, and what areas continue to need further research. RECENT FINDINGS: EA patients are at high risk for gastroesophageal reflux and esophageal strictures, and the sequela that result...
November 25, 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/29177066/non-acid-gastro-oesophageal-reflux-is-associated-with-squamous-cell-carcinoma-of-the-oesophagus
#13
Mpho Kgomo, Taole R Mokoena, James A Ker
Introduction: Squamous cell carcinoma of the oesophagus is a common cancer among South Africans. Due to the absence of effective screening and surveillance programme for early detection and late presentation, squamous cell carcinoma of the oesophagus is usually diagnosed at an advanced stage or when metastasis has already occurred. The 5-year survival is often quoted at 5%-10%, which is poor. Objectives: To determine the association between oesophageal squamous cell carcinoma (OSCC) and non-acid gastro-oesophageal reflux disease...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/29174850/association-between-pepsin-in-the-saliva-and-the-subjective-symptoms-in-patients-with-laryngopharyngeal-reflux
#14
Ah Ra Jung, Oh Eun Kwon, Jung Min Park, Sung Hwa Dong, Su Young Jung, Young Chan Lee, Young-Gyu Eun
OBJECTIVES: Our study was designed to further evaluate the relationships between the saliva pepsin level and the symptoms and quality of life of patients with laryngopharyngeal reflux (LPR). STUDY DESIGN: A prospective cohort study without controls. SETTING: Tertiary teaching hospital. SUBJECTS AND METHODS: We analyzed 50 patients diagnosed with LPR by 24-hour multichannel intraluminal impedance pH monitoring. All subjects were instructed to collect saliva samples upon waking in the morning...
November 24, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29166876/gastroesophageal-flap-valve-reflected-egj-morphology-and-correlated-to-acid-reflux
#15
Chenxi Xie, Yuwen Li, Ning Zhang, Lishou Xiong, Minhu Chen, Yinglian Xiao
OBJECTIVE: The anatomy of esophagogastric junction (EGJ) serves as the anti-reflux barrier. The gastroesophageal flap valve (GEFV) is a component of EGJ. The aim of the current study was to assess its correlation with the esophageal acid exposure and the impact on anti-reflux barrier function by using the metrics of EGJ contraction. METHODS: Eighty three patients with typical GERD symptoms were included in the study. Upper endoscopy, high-resolution manometry (HRM) and 24 h multichannel intraluminal impedance-pH (MII-pH) monitoring were performed in all patients...
November 22, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/29155563/cellular-effects-and-delivery-propensity-of-penetratin-is-influenced-by-conjugation-to-parathyroid-hormone-fragment-1-34-in-synergy-with-ph
#16
Mie Kristensen, Line Hagner Nielsen, Kinga Zór, Anja Boisen, Malene Vinther Christensen, Jens Berthelsen, Hanne Mørck Nielsen
The cell-penetrating peptide (CPP) penetratin, has demonstrated potential as a carrier for transepithelial delivery of cargo peptides, such as the therapeutically relevant part of parathyroid hormone, i.e. PTH(1-34). The purpose of the present study was to elucidate the relevance of modifying the pH for PTH(1-34)-penetratin conjugates and for co-administered penetratin with PTH(1-34) in terms of transepithelial permeation of PTH(1-34) and cellular effects. Transepithelial permeation was assessed using monolayers of the Caco-2 cell culture model, and effects on Caco-2 cellular viability kinetics were evaluated by using the Real-Time-GLO assay as well as by microscopy following Tryphan blue staining...
November 20, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29119844/symptom-relief-and-health-related-quality-of-life-in-globus-patients-a-prospective-study
#17
Pia Järvenpää, Assi Laatikainen, Risto P Roine, Harri Sintonen, Perttu Arkkila, Leena-Maija Aaltonen
Globus may be a persistent symptom impairing patients' quality of life. Diagnostics and treatment are controversial but some globus patients may benefit from reassurance and attention. We investigated how globus symptoms change during a short-term follow-up without any treatment after an examination by an ear, nose and throat (ENT) physician and further diagnostic procedures. We also surveyed whether patients with persistent globus suffer from simultaneous voice problems. The study comprised 30 consecutive globus patients referred to Helsinki University Hospital, Department of Otorhinolaryngology - Head and Neck Surgery...
November 9, 2017: Logopedics, Phoniatrics, Vocology
https://www.readbyqxmd.com/read/29110377/abnormal-esophageal-acid-exposure-on-high-dose-proton-pump-inhibitor-therapy-is-common-in-systemic-sclerosis-patients
#18
E K Stern, D A Carlson, S Falmagne, A D Hoffmann, M Carns, J E Pandolfino, M Hinchcliff, D M Brenner
BACKGROUND: Esophageal dysfunction and gastro-esophageal reflux disease (GERD) are common among patients with systemic sclerosis (SSc). Although high-dose proton pump inhibitors (PPIs) typically normalize esophageal acid exposure, the effectiveness of PPI therapy has not been systematically studied in SSc patients. The aim of this study was to characterize reflux in SSc patients on high-dose PPI using esophageal pH-impedance testing. METHODS: In this case-controlled retrospective analysis, 38 patients fulfilling 2013 American College of Rheumatology SSc criteria who underwent esophageal pH-impedance testing on twice-daily PPI between January 2014 and March 2017 at a tertiary referral center were compared with a control-cohort of 38 non-SSc patients matched for PPI formulation and dose, hiatal hernia size, age, and gender...
November 6, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29110162/recent-advances-in-the-pharmacological-management-of-gastroesophageal-reflux-disease
#19
REVIEW
Yu-Min Kung, Wen-Hung Hsu, Meng-Chieh Wu, Jiunn-Wei Wang, Chung-Jung Liu, Yu-Chung Su, Chao-Hung Kuo, Fu-Chen Kuo, Deng-Chyang Wu, Yao-Kuang Wang
The management of proton pump inhibitor-refractory GERD (rGERD) is a challenge in clinical practice. Since up to one-third of patients with typical GERD symptoms (heartburn and/or acid regurgitation) are not satisfied with proton pump inhibitor (PPI) therapy, new drug development targeting different pathophysiologies of GERD is imperative. At present, no other drugs serve as a more potent acid suppression agent than PPIs. As an add-on therapy, histamine type-2 receptor antagonists, alginates, prokinetics and transient lower esophageal sphincter relaxation inhibitors have some impact on the subgroups of rGERD, but greater effectiveness and fewer adverse effects for widespread use are required...
December 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29104588/preoperative-diagnosis-of-hiatal-hernia-barium-swallow-x-ray-high-resolution-manometry-or-endoscopy
#20
Michael Weitzendorfer, Gernot Köhler, Stavros A Antoniou, Leo Pallwein-Prettner, Lisa Manzenreiter, Philipp Schredl, Klaus Emmanuel, Oliver Owen Koch
Background: The assessment of hiatal hernias (HH) is typically done with barium swallow X‑ray, upper endoscopy, and by high-resolution esophageal manometry (HRM). The aim of this study was to assess the clinical utility of these methods in terms of HH detection and their correlation to gastroesophageal reflux disease (GERD). Methods: A retrospective comparative analysis of patients with symptoms of GERD was carried out. The performance of endoscopy and HRM in diagnosing HH was assessed, taking barium swallow X‑ray as a reference...
2017: European Surgery: ACA: Acta Chirurgica Austriaca
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