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https://www.readbyqxmd.com/read/29031153/facile-displacement-of-citrate-residues-from-gold-nanoparticle-surfaces
#1
Ganganath S Perera, Sumudu A Athukorale, Felio Perez, Charles U Pittman, Dongmao Zhang
The stability of citrate-residues on gold nanoparticles (AuNPs) against ligand displacement has been controversial. Using AuNPs synthesized with deuterated citrate in combination with in-situ surface-enhanced Raman spectroscopic (SERS) analysis, we report that both citrate-residues and solution impurities can be simultaneously adsorbed onto citrate-reduced AuNPs in solution. The citrate-residues can be readily displaced from AuNPs by organosulfur such as organothiols (RS-H), organodisuflide (R-S-S-R), and non-specific ligands including halides and adenine...
October 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29028817/mitochondrial-dysfunction-in-the-gastrointestinal-mucosa-of-children-with-autism-a-blinded-case-control-study
#2
Shannon Rose, Sirish C Bennuri, Katherine F Murray, Timothy Buie, Harland Winter, Richard Eugene Frye
Gastrointestinal (GI) symptoms are prevalent in autism spectrum disorder (ASD) but the pathophysiology is poorly understood. Imbalances in the enteric microbiome have been associated with ASD and can cause GI dysfunction potentially through disruption of mitochondrial function as microbiome metabolites modulate mitochondrial function and mitochondrial dysfunction is highly associated with GI symptoms. In this study, we compared mitochondrial function in rectal and cecum biopsies under the assumption that certain microbiome metabolites, such as butyrate and propionic acid, are more abundant in the cecum as compared to the rectum...
2017: PloS One
https://www.readbyqxmd.com/read/29028588/formation-of-struvite-urinary-stones-and-approaches-towards-the-inhibition-a-review
#3
REVIEW
Poppy Das, Gaurav Gupta, Vinodhini Velu, Rajendra Awasthi, Kamal Dua, Himaja Malipeddi
BACKGROUND: Struvite is one of the most common urinary/kidney stones, composed of magnesium ammonium phosphate (MgNHPO4·H2O). They are also termed as infection stones as these are associated with urinary tract infections. Numerous studies have been carried out to examine the growth and inhibition of struvite stones. OBJECTIVE: This review summarizes various reports on the factors responsible for inducing struvite stones in the kidney and gives a detailed account of studies on inhibition of growth of struvite crystals...
October 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29027706/regional-citrate-anticoagulation-with-calcium-replacement-in-pediatric-apheresis
#4
Katie Sigler, Ji Lee, Poyyapakkam Srivaths
PURPOSE: The objective of this retrospective analysis was to present our single-center experience with intravenous (IV) calcium replacement and regional citrate anticoagulation in pediatric apheresis therapy with the aim of developing a standard operating procedure to minimize symptomatic hypocalcemia. METHODS: We analyzed apheresis procedures in patients <18 years of age over a 2-year time period (Jan 2012 to Dec 2014). Procedures in tandem with other extracorporeal therapies, including continuous renal replacement therapy, extracorporeal liver support, and extracorporeal membrane oxygenation, were excluded...
October 13, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29027526/-investigation-of-the-structure-of-a-functionally-intact-xenopericardial-bioconduit-after-long-term-implantation
#5
R A Mukhamadiyarov, N V Rutkovskaya, I V Milto, O D Sidopova, Yu А Kudryavtseva, L S Barbarash
AIM: to investigate the cellular composition of a functionally intact xenopericardial valve in a recipient with acquired mitral defect after long-term implantation. MATERIAL AND METHODS: A Uniline bioconduit (BC) ('Neocor', Kemerovo) removed from the heart in the mitral position at 7.2 years after implantation was investigated. Heart valve leaflets were fixed in a buffered 4% paraformaldehyde solution and imbedded in paraffin or epoxy resin. Slices made from the paraffin samples were stained with hematoxylin and eosin or underwent immunohistochemical (IHC) examination for typing endothelial cells, smooth muscle cells, macrophages, fibroblasts, and T and B lymphocytes...
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/29026190/growth-hormone-secretagogues-hexarelin-and-jmv2894-protect-skeletal-muscle-from-mitochondrial-damages-in-a-rat-model-of-cisplatin-induced-cachexia
#6
Giuseppe Sirago, Elena Conte, Flavio Fracasso, Antonella Cormio, Jean-Alain Fehrentz, Jean Martinez, Clara Musicco, Giulia Maria Camerino, Adriano Fonzino, Laura Rizzi, Antonio Torsello, Angela Maria Serena Lezza, Antonella Liantonio, Palmiro Cantatore, Vito Pesce
Chemotherapy can cause cachexia, which consists of weight loss associated with muscle atrophy. The exact mechanisms underlying this skeletal muscle toxicity are largely unknown and co-therapies to attenuate chemotherapy-induced side effects are lacking. By using a rat model of cisplatin-induced cachexia, we here characterized the mitochondrial homeostasis in tibialis anterior cachectic muscle and evaluated the potential beneficial effects of the growth hormone secretagogues (GHS) hexarelin and JMV2894 in this setting...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29024598/effects-of-long-term-exposures-to-low-iron-and-branched-chain-amino-acid-containing-diets-on-aging-skeletal-muscle-of-fisher-344-brown-norway-rats
#7
Yuho Kim, Sok Sambo Men, Chen Liang, Candace N Receno, Tom D Brutsaert, Donna L Korol, Kevin S Heffernan, Keith C DeRuisseau
Aging skeletal muscle displays an altered iron status that may promote oxidative stress and sarcopenia. A low iron (LI) containing diet could reduce muscle iron status and attenuate age-related muscle atrophy. Supplemental branched-chain amino acids (BCAA) may also alleviate sarcopenia by promoting muscle protein synthesis and iron status improvement. This study examined individual and combined effects of LI and BCAA diets on anabolic signaling and iron status in skeletal muscle of aging rats. Twenty-nine-month-old male F344BN rats consumed the following control-base diets: Control + regular iron (35 mg iron/kg) (CR; n = 11); Control + LI (~6 mg iron/kg) (CL; n = 11); 2×BCAA + regular iron (BR; n = 10); and 2×BCAA + LI (BL; n = 12) for 12 weeks...
October 12, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29023067/studies-on-staphylococcus-aureus-isolated-from-pimples
#8
Ajayi Adesola Adetutu, Bibi Oritsewehinmi, Oniha Margaret Ikhiwili, Atolagbe Oluwabunmi Moradeke, Anosike Selina Odochi, Onibokun Elizabeth Adeola
BACKGROUND AND OBJECTIVE: Pimples (acne) are small skin lesions or inflammations of the skin. The most common factor causing acne is the hormonal changes that occur during adolescent and teenage years. Antibiotics are becoming less effective in the treatment of pimples due to increasing concerns of antibiotic resistance. This study was therefore carried out to characterize the isolates from the pimples of Covenant University Students and to determine their antibiotics sensitivity pattern...
2017: Pakistan Journal of Biological Sciences: PJBS
https://www.readbyqxmd.com/read/29022989/prophylactic-intravenous-calcium-therapy-for-exchange-blood-transfusion-in-the-newborn
#9
REVIEW
Tinuade A Ogunlesi, Foluso Ea Lesi, Olabisi Oduwole
BACKGROUND: Exchange blood transfusion (EBT) is a form of whole blood transfusion in which the total blood volume is replaced within a few hours. In perinatal and neonatal medicine, EBT is most often used in the management of severe anaemia or severe hyperbilirubinaemia in the first week of life. Hypocalcaemia, one of the common morbidities associated with EBT, is thought to arise from the chelating effects of the citrate commonly used as an anticoagulant in the donor's blood. This disorder manifests with muscular and nervous irritability and cardiac arrhythmias...
October 12, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29018486/serum-and-liver-tissue-metabonomic-study-on-fatty-liver-in-rats-induced-by-high-fat-diet-and-intervention-effects-of-traditional-chinese-medicine-qushi-huayu-decoction
#10
Xiao-Jun Gou, Qin Feng, Lin-Lin Fan, Jian Zhu, Yi-Yang Hu
Qushi Huayu Decoction (QSHY), clinically derived, consists of five crude drugs, commonly used in treating fatty liver in a clinical setting. However, little is known about its metabolomics study. Herein, the serum and liver tissue metabolomics approach, based on gas chromatography coupled to spectrometry (GC/MS), was employed to evaluate the efficacy and the mechanism underlying QSHY in a rat model of high-fat diet-induced fatty liver. With pattern recognition analysis of serum and liver tissue metabolite profile, a clear separation of model group and control group was acquired for serum and liver tissue samples, respectively...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29018304/the-new-greiner-fc-mix-tubes-equal-the-old-terumo-ones-and-are-useful-as-glucose-stabilizer-after-prolonged-storage-of-samples
#11
Graziella Bonetti, Mariarosa Carta
INTRODUCTION: The aim of our study is to compare new Greiner tubes containing granulated citrate buffer with the Terumo ones and to verify if they are suitable for glucose stabilization after prolonged storage. MATERIALS AND METHODS: In Study 1, blood was collected in two Terumo and two Greiner tubes from 40 healthy volunteers. Samples were stored at room temperature (RT) for 1 and 2 hours, respectively. Comparison was made by Deming regression. In Study 2, glucose was measured in a reference tube (N = 50), according to the ADA-NACB guidelines and in aliquots of Greiner samples maintained un-centrifuged at RT for 1, 2, 4 (N = 50) and 24, 48, 72 hours (N = 35)...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29017436/role-of-markov-modeling-approaches-to-understand-the-impact-of-infertility-treatments
#12
Arni S R Srinivasa Rao, Michael P Diamond
We are proposing to use Markov modeling type of analysis to understand data generated by treatments for infertility in women receiving ovarian stimulations. We describe the conceptual novelties, need for such an analysis, basics of the proposed methods, and theoretical constructions of various probabilities associated with practical level implementation of the Markov modeling procedures. This method can be adopted to infertility-related data visualizations whenever progression of outcome stages in infertility treatment is recorded...
November 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/29017174/cardiac-remodeling-induced-by-all-trans-retinoic-acid-is-detrimental-in-normal-rats
#13
Renata A C Silva, Andréa F Gonçalves, Priscila P Dos Santos, Bruna Rafacho, Renan F T Claro, Marcos F Minicucci, Paula S Azevedo, Bertha F Polegato, Silméia G Zanati, Ana Angélica Fernandes, Sergio A R Paiva, Leonardo A M Zornoff
BACKGROUND/AIMS: This study aimed to discern whether the cardiac alterations caused by retinoic acid (RA) in normal adult rats are physiologic or pathologic. METHODS AND RESULTS: Wistar rats were assigned into four groups: control animals (C, n = 20) received a standard rat chow; animals fed a diet supplemented with 0.3 mg/kg/day all-trans-RA (AR1, n = 20); animals fed a diet supplemented with 5 mg/kg/day all-trans-RA (AR2, n = 20); and animals fed a diet supplemented with 10 mg/kg/day all-trans-RA (AR3, n = 20)...
October 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28993031/targeting-atp-citrate-lyase-in-hyperlipidemia-and-metabolic-disorders
#14
REVIEW
Stephen L Pinkosky, Pieter H E Groot, Narendra D Lalwani, Gregory R Steinberg
Chronic overnutrition and a sedentary lifestyle promote imbalances in metabolism, often manifesting as risk factors for life-threating diseases such as atherosclerotic cardiovascular disease (ASCVD) and nonalcoholic fatty liver disease (NAFLD). Nucleocytosolic acetyl-coenzyme A (CoA) has emerged as a central signaling node used to coordinate metabolic adaptations in response to a changing nutritional status. ATP-citrate lyase (ACL) is the enzyme primarily responsible for the production of extramitochondrial acetyl-CoA and is thus strategically positioned at the intersection of nutrient catabolism and lipid biosynthesis...
October 6, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/28992020/rapid-communication-dietary-selenium-improves-skeletal-muscle-mitochondrial-biogenesis-in-young-equine-athletes
#15
S H White, S Wohlgemuth, C Li, L K Warren
Exercise is known to promote mitochondrial biogenesis in skeletal muscle as well as enhance mitochondrial function and efficiency in human and rodent models. These adaptations help to decrease exercise-associated production of reactive oxygen species, which can negatively affect health and performance if antioxidant mechanisms are overwhelmed. Little is known about the adaptations of mitochondria in response to exercise training in the growing horse or if supplementation with a dietary antioxidant can improve mitochondrial function...
September 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28991988/citrate-addition-increased-phosphorus-bioavailability-and-enhanced-gasoline-bioremediation
#16
Tingting Chen, Courtney Philips, Jordan Hamilton, Blaine Chartbrand, Jay Grosskleg, Kris Bradshaw, Trevor Carlson, Karen Timlick, Derek Peak, Steven D Siciliano
Phosphorus (P) bioavailability often limits gasoline biodegradation in calcareous cold-region soils. One possible method to increase P bioavailability in such soils is the addition of citrate. Citrate addition at the field scale may increase hydrocarbon degradation by: (i) enhancing inorganic and organic P dissolution and desorption, (ii) increasing hydrocarbon bioavailability, and/or (iii) stimulating microbial activity. Alternatively, citrate addition may inhibit activity due to competitive effects on carbon metabolism...
September 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28991900/intra-individual-variability-and-circadian-rhythm-of-vascular-endothelial-growth-factors-in-subjects-with-normal-glucose-tolerance-and-type-2-diabetes
#17
Markolf Hanefeld, Katrin Engelmann, Dieter Appelt, Dirk Sandner, Ingo Weigmann, Xenia Ganz, Frank Pistrosch, Carsta Köhler, Antje Gasparic, Andreas L Birkenfeld
Increased levels of systemic vascular endothelial growth factors (VEGFs) in patients with diabetes are associated with increased risk of microvessel disease. On the other hand, low VEGF levels after intravitreal antibody application may be associated with acute cardiovascular complications and treatment failure. Individual levels of systemic VEGF vary in a wide range depending on analytical methods and quality of diabetes control. So far only limited information exists on intraindividual fluctuations over longer periods and circadian rhythms...
2017: PloS One
https://www.readbyqxmd.com/read/28990817/annals-express-a-combined-liquid-chromatography-tandem-mass-spectrometry-assay-for-the-quantification-of-urinary-oxalate-and-citrate-for-diagnosis-and-management-of-nephrolithiasis
#18
David John Marshall, Joanne Elaine Adaway, Brian G Keevil
Background 24 hour urine citrate and oxalate analysis is important in the screening and monitoring of patients with nephrolithiasis. To streamline the analytical process it was decided to combine oxalate and citrate and analyse them simultaneously in the same assay. Objective A highly sensitive and specific assay for analysis of urine citrate and oxalate was developed using liquid chromatography-tandem mass spectrometry (LC-MS/MS) with a simple weak anion exchange solid phase extraction (WAX SPE) clean up procedure...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28987793/silver-nanoparticles-induce-lysosomal-autophagic-defects-and-decreased-expression-of-transcription-factor-eb-in-a549-human-lung-adenocarcinoma-cells
#19
Takamitsu Miyayama, Kota Fujiki, Masato Matsuoka
Although silver nanoparticles (AgNPs) are widely used in consumer and medical products, the mechanism by which AgNPs cause pulmonary damage is unclear. AgNPs are incorporated into cells and processed via the autophagy pathway. We examined the effects of AgNP exposure on autophagic flux and expression of transcription factor EB (TFEB) in A549 lung adenocarcinoma cells. In cells exposed to citrate-coated 60-nm AgNPs, confocal laser microscopic examination showed a decrease in the LysoTracker fluorescence signal and an increase in that of Cyto-ID, indicating lysosomal pH alkalization and autophagosome formation, respectively...
October 5, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28987537/tuning-the-rheological-properties-of-an-ammonium-methacrylate-copolymer-for-the-design-of-adhesives-suitable-for-transdermal-patches
#20
Gaia M G Quaroni, Chiara G M Gennari, Francesco Cilurzo, Guylaine Ducouret, Costantino Creton, Paola Minghetti
Eudragit® RL (EuRL) matrices have been proposed to release a drug to the skin. However, no information is available on both viscoelastic and adhesive properties of such compositions. This work focuses on the evaluation of both rheological and texture properties of EuRL differently plasticized with tributyl citrate (TBC) or triacetin (TRI) in order to design a pressure sensitive adhesive suitable for transdermal patch preparation. The patch adhesive properties (i.e. tack, peel adhesion and shear adhesion) as well as its in vitro biopharmaceutical performances were determined after loading ibuprofen, ketoprofen or flurbiprofen...
October 5, 2017: European Journal of Pharmaceutical Sciences
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