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The role of iodine

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https://www.readbyqxmd.com/read/29141384/-problems-deserving-attention-in-preventing-infection-in-cataract-surgery
#1
J Ye
Endophthalmitis is one of the most serious complications of cataract surgery. The surgeons try to reduce the incidence of endophthalmitis. In order to prevent postoperative infection, irrigation of the conjunctival sac with povidone iodine and injection of antibiotics into the anterior chamber before the end of the surgery are used. Although there are a lot of reports about the concentration, mode and duration of povidone iodine application, there is no consensus. There are many options for antibiotics, including cefuroxime, vancomycin and moxifloxacin...
November 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29138890/role-of-rapid-kv-switching-dual-energy-ct-in-assessment-of-post-surgical-local-recurrence-of-pancreatic-adenocarcinoma
#2
Anushri Parakh, Manuel Patino, Daniela Muenzel, Avinash Kambadakone, Dushyant V Sahani
PURPOSE: The purpose of this study is to evaluate the performance of material-specific iodine (MS-I) images generated by rapid kV-switching single-source dual-energy computed tomography (rsDECT) for distinguishing post-operative changes from local tumor recurrence in patients on follow-up for pancreatic adenocarcinoma after surgical resection. METHODS: In this IRB-approved HIPPA-compliant study, retrospective review of 51 patients who underwent surgical resection of pancreatic adenocarcinoma was conducted and were followed up using contrast-enhanced rsDECT (Discovery CT 750HD, GE Healthcare, Milwaukee, WI)...
November 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29137455/metal-ion-interactions-induced-p-i-n-junction-in-methylammonium-lead-triiodide-perovskite-single-crystals
#3
Ting Wu, Rupam Mukherjee, Olga S Ovchinnikova, Liam Collins, Mahshid Ahmadi, Wei Lu, Nam-Goo Kang, Jimmy W Mays, Stephen Jesse, David Mandrus, Bin Hu
Hybrid perovskites, as emerging multifunctional semiconductors, have demonstrated dual electronic/ionic conduction properties. Here we report a metal/ion interaction induced p-i-n junction across slightly n-type doped MAPbI3 single crystals with Au/MAPbI3/Ag configuration based on interface depend-ent Seebeck effect, Hall effect and time-of-flight secondary ion mass spectrometry analysis. The organic cations (MA(+)) are shown to interact with Au atoms, forming positively charged coordination complexes at Au/MAPbI3 interface, while iodine anions (I(-)) can react with Ag contacts, leading to interfacial ionic polarization...
November 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29126111/second-radioiodine-treatment-limited-benefit-for-differentiated-thyroid-cancer-with-loforegional-persistent-disease
#4
Dania Hirsch, Alexander Gorshtein, Eyal Robenshtok, Hiba Masri-Iraqi, Amit Akirov, Hadar Duskin Bitan, Ilan Shimon, Carlos Benbassat
Purpose: Radioactive iodine (RAI) treatment is often indicated after total thyroidectomy in differentiated thyroid cancer (DTC). However, its role in biochemical or loco-regional persistent DTC is unclear. We aimed to investigate the impact of a second RAI treatment in patients with incomplete response to initial treatment and no evidence of distant metastases. Methods: Patients who underwent at least two RAI treatments over a 20-year period at a tertiary hospital were identified...
November 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29123683/thermomechanical-effect-in-molecular-crystals-the-role-of-halogen-bonding-interactions
#5
Sudhir Mittapalli, D Sravanakumar Perumalla, Jagadeesh Babu Nanubolu, Ashwini Nangia
The design and synthesis of mechanically responsive materials is interesting because they are potential candidates to convert thermal energy into mechanical work. Reported in this paper are thermosalient effects in a series of halogen derivatives of salinazids. The chloro derivative, with higher electronegativity and a weaker inter-halogen bond strength (Cl⋯Cl) exhibits an excellent thermal response, whereas the response is weaker in the iodo derivative with stronger I⋯I halogen bonding. 3,5-Di-chloro-salinazid (Compound-A) exists in three polymorphic forms, two room-temperature polymorphs (Forms I and II) and one high-temperature modification (Form III)...
November 1, 2017: IUCrJ
https://www.readbyqxmd.com/read/29123502/anaplastic-thyroid-cancer-in-sicily-the-role-of-environmental-characteristics
#6
Martina Tavarelli, Pasqualino Malandrino, Paolo Vigneri, Pierina Richiusa, Adele Maniglia, Maria A Violi, Giulia Sapuppo, Veronica Vella, Gabriella Dardanoni, Riccardo Vigneri, Gabriella Pellegriti
Background: Anaplastic thyroid cancer (ATC) is a rare but extremely aggressive cancer of the thyroid, contributing up to 30-40% of thyroid cancer-specific mortality. We analyzed ATC characteristics and survival rates in Sicily to evaluate the possible influence of environmental factors. With this aim, data regarding ATC incidences in urban/rural and industrial, iodine-deficient, and volcanic vs control areas were compared in Sicily as well as ATC data from Sicily and USA. Methods: Using the Sicilian Register of Thyroid Cancer (SRTC) database incidence, age, gender, tumor size and histotype, extrathyroidal extension, stage, and coexistence with pre-existing differentiated thyroid cancer (DTC) were evaluated in different areas of Sicily and also compared with Surveillance Epidemiology and End Results data in USA...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29120649/-thyroid-disease-in-the-czech-republic-the-euthyroid-project-and-the-evaluation-of-the-general-health-insurance-company-epidemiological-data-for-the-period-of-2012-2015
#7
Radovan Bílek, Lenka Horáková, Robert Goš, Václav Zamrazil
Institute of Endocrinology participates in the grant of European Commission EUthyroid (Towards the elimination of iodine deficiency and preventable thyroid-related diseases in Europe), together with other 28 European countries. The role of Institute of Endocrinology in EUthyroid is among other things to ensure access to national registers relating to thyroid diseases. The results presented here correspond to the years 2012-2015 and are based on data from the General Health Insurance Company Czech Republic (VZP CR), which has 6 million insured persons (ratio male : female = 1 : 1)...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29105856/rapid-iododeboronation-with-and-without-gold-catalysis-application-to-radiolabelling-of-arenes
#8
Stacey Webster, Kerry M O'Rourke, Conor Fletcher, Sally Pimlott, Andrew Sutherland, Ai-Lan Lee
Radiopharmaceuticals incorporating radioactive iodine in combination with SPECT imaging play a key role in nuclear medicine, with applications in drug development and disease diagnosis. Despite this importance, there are relatively few general methods for incorporating radioiodine into small molecules. Here we describe a rapid, air- and moisture-stable ipso-iododeboronation procedure using NIS, in the non-toxic and green solvent dimethyl carbonate. The fast reaction and mild conditions of the gold-catalysed method led to the development of a highly efficient process for radiolabelling of arenes, which constitutes the first example of an application of homogenous gold catalysis to selective radiosynthesis...
November 6, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29098272/adjuvant-external-beam-radiotherapy-in-locally-advanced-differentiated-thyroid-cancer
#9
Samantha Tam, Moran Amit, Mongkol Boonsripitayanon, Maria E Cabanillas, Naifa L Busaidy, G Brandon Gunn, Stephen Y Lai, Neil D Gross, Erich M Sturgis, Mark E Zafereo
Importance: As incidence of differentiated thyroid cancer rises, treatment paradigms have become increasingly defined. Despite this, locally advanced disease continues to be challenging to manage. Postoperative therapy in the form of radioactive iodine (RAI) is generally recommended, but the role of external beam radiation therapy (EBRT) is less well defined. Objective: To investigate the role of EBRT in locally advanced differentiated thyroid cancer. Design, Setting, and Participants: For this retrospective cohort study, patients treated surgically for T4a differentiated thyroid cancer at the University of Texas MD Anderson Cancer Center from January 2000 through December 2015 were recruited, and 88 patients were included for analysis...
November 2, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29052174/phagocytosis-deficiency-of-macrophages-in-nod-h-2-h4-mice-accelerates-the-severity-of-iodine-induced-autoimmune-thyroiditis
#10
Xue He, Chuhui Xiong, Aihua Liu, Wei Zhao, Xinghai Xia, Shiqiao Peng, Chenyan Li, Mi Zhou, Yushu Li, Xiaoguang Shi, Zhongyan Shan, Weiping Teng
Apoptosis occurs in many autoimmune diseases. Excess iodine induces thyrocyte apoptosis and increases the incidence and prevalence of autoimmune thyroiditis (AIT). However, the sequence of events between the appearance of thyrocyte apoptosis and the occurrence of thyroiditis remains uncharacterized. Furthermore, few studies have investigated the role of macrophage phagocytosis in the development of AIT. Therefore, we evaluated the relationship between apoptosis and inflammatory infiltration in NOD.H-2(h4) mouse thyroids by comparing the sequence of events in tissue samples...
October 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29049252/prognostic-role-of-fdg-pet-ct-in-patients-with-differentiated-thyroid-cancer-treated-with-131-iodine-empiric-therapy
#11
Barbara Salvatore, Michele Klain, Emanuele Nicolai, Domenico D'Amico, Gianluca De Matteis, Marco Raddi, Rosa Fonti, Teresa Pellegrino, Giovanni Storto, Alberto Cuocolo, Leonardo Pace
BACKGROUND: To assess the long-term prognostic value of F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in patients with differentiated thyroid carcinoma (DTC) undergoing empiric radioiodine (RAI) therapy due to raising values of thyroglobulin (Tg). METHODS: Forty-nine patients with histological diagnosis of DTC (31 with papillary and 18 with follicular carcinoma) follow-up for a mean period of 7.9 ± 5 years after empiric RAI therapy were retrospectively analyzed...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29023125/autocatalytic-oxidation-of-trithionate-by-iodate-in-a-strongly-acidic-medium
#12
György Csekő, Changwei Pan, Qingyu Gao, Chen Ji, Attila K Horváth
The trithionate-iodate reaction has been studied spectrophotometrically in an acidic medium at 25.0 ± 0.1 °C in phosphoric acid/dihydrogen phosphate buffer, monitoring the absorbance at 468 nm at the isosbestic point of the iodine-triiodide ion system and at I = 0.5 M ionic strength adjusted by sodium perchlorate. The main characteristics of the title system are very reminiscent of those found recently in the pentathionate-iodate and the pentathionate-periodate reactions, the systems paving the way for classifying clock reactions...
October 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29019097/efficacy-of-conventional-and-liposomal-povidone-iodine-in-infected-mesh-skin-grafts-an-exploratory-study
#13
Peter M Vogt, Joerg Hauser, Stefan Mueller, Bjoern Bosse, Michael Hopp
INTRODUCTION: Infection is a major threat to wound healing and a leading cause of graft loss in patients undergoing meshed skin grafts (MSGs). Therefore, topical antisepsis is important in the overall treatment scheme. METHODS: An exploratory satellite group of 14 patients with infected MSGs were enrolled as part of a prospective, randomized, controlled, parallel-group, open-label, pilot Phase II study that investigated the efficacy and tolerability of 3% liposomal povidone-iodine hydrogel (PVP-ILH, Repithel(®); RepiGel(®)) versus chlorhexidine gauze in non-infected MSGs...
October 10, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28992617/iodine-promotes-tumorigenesis-of-thyroid-cancer-by-suppressing-mir-422a-and-up-regulating-mapk1
#14
Junyi Wang, Haiou Yang, Yiran Si, Dongzhi Hu, Yang Yu, Yan Zhang, Ming Gao, Haiyang Zhang
BACKGROUND/AIMS: Iodine may trigger tumorigenesis and development of thyroid carcinoma, but the mechanisms involved remained elusive. MicroRNA (MiRNAs) are known to be involved in each stage of cancer development; however, the role of miRNAs in iodine-induced tumorigenesis of thyroid carcinoma remained unknown. In this study, we aimed at investigating miRNA related signaling pathway in thyroid cancer cells. METHODS: Levels of miRNAs and mRNAs were determined using RT-qPCR and proteins were quantified by western blotting...
October 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28958220/collective-ion-pair-single-drop-microextraction-attenuated-total-reflectance-fourier-transform-infrared-spectroscopic-determination-of-perchlorate-in-bioenvironmental-samples
#15
Swati Chandrawanshi, Santosh K Verma, Manas K Deb
Perchlorate (ClO₄(−)) is an environmental pollutant thataffects human health. Perchlorate acts as a competitive inhibitor of iodine uptake in the thyroid gland (sodium–iodide symporter inhibitor); thus, its determination is important for public health concerns. Water and milk constitute a significant portion of the human diet. Because regular intake leads to an increase in perchlorate concentration in the human body, the estimation of perchlorate is of great concern. In this work, ion-pair single-drop microextraction (SDME) combined with attenuated total reflectance (ATR)-FTIR spectroscopy has been developed for the determination of perchlorate in bioenvironmental (soil, water, dairy milk, breast milk, and urine) samples...
September 28, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28949122/role-of-positron-emission-tomography-in-thyroid-and-neuroendocrine-tumours
#16
Giorgio Treglia, Alexander S Kroiss, Arnoldo Piccardo, Filippo Lococo, Prasanna Santhanam, Alessio Imperiale
BACKGROUND: Positron emission tomography (PET) is an established imaging method in oncology. PET/computed tomography (PET/CT) and PET/magnetic resonance imaging (PET/MRI) are hybrid techniques which combine morphological information obtained by CT and MRI with functional data provided by PET. Several radiotracers evaluating different metabolic pathways or receptor status can be used as PET radiotracers to assess endocrine tumours such as thyroid tumours or neuroendocrine neoplasms (NENs)...
September 25, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28944925/autophagy-is-activated-to-protect-renal-tubular-epithelial-cells-against-iodinated-contrast-media%C3%A2-induced-cytotoxicity
#17
Na Liu, Rong Lei, Mi-Mi Tang, Wei Cheng, Min Luo, Qian Xu, Shao-Bin Duan
With the steady increase in the use of various contrast‑related technologies in recent years, contrast‑induced nephropathy has received significant attention from clinicians and researchers. The present study aimed to determine the potential role of autophagy in iodinated contrast media (CM)‑induced cell injury and apoptosis in human proximal renal tubular epithelial HK‑2 cells. The present study used the iodinated CM iohexol (200 mg iodine/ml) to treat HK‑2 cells for 6 h, in order to establish a damaged cell model...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28927158/regulation-of-htra2-on-wt1-gene-expression-under-imatinib-stimulation-and-its-effects-on-the-cell-biology-of-k562-cells
#18
Lixia Zhang, Yan Li, Xiaoyan Li, Qing Zhang, Shaowei Qiu, Qi Zhang, Min Wang, Haiyan Xing, Qing Rao, Zheng Tian, Kejing Tang, Jianxiang Wang, Yingchang Mi
The aim of the present study was to investigate the regulation of Wilms Tumor 1 (WT1) by serine protease high-temperature requirement protein A2 (HtrA2), a member of the Htr family, in K562 cells. In addition, the study aimed to observe the effect of this regulation on cell biological functions and its associated mechanisms. Expression of WT1 and HtrA2 mRNA, and proteins following imatinib and the HtrA2 inhibitor 5-[5-(2-nitrophenyl) furfuryl iodine]-1, 3-diphenyl-2-thiobarbituric acid (UCF-101) treatment was detected with reverse transcription-quantitative polymerase chain reaction and western blot analysis...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926758/some-aspects-of-the-iodine-metabolism-of-the-giant-kelp-macrocystis-pyrifera-phaeophyceae
#19
Teresa M Tymon, Eric P Miller, Jennifer L Gonzales, Andrea Raab, Frithjof C Küpper, Carl J Carrano
Despite its paramount role in the functioning of coastal ecosystems, relatively little is known about halogen metabolism in giant kelp (Macrocystis pyrifera). This is an important shortcoming given the potential implications for marine and atmospheric chemical processes in the wide distribution range of Macrocystis. The work presented here constitutes the first in depth investigation of the uptake, efflux, and of the physiological function of iodide in this important kelp species. Iodide uptake and efflux rates were measured in adult sporophytes of Macrocystis under normal and stressed (exogenous hydrogen peroxide and an elicitor-triggered oxidative burst) conditions...
September 8, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28918271/the-role-of-sulfate-reducing-prokaryotes-in-the-coupling-of-element-biogeochemical-cycling
#20
REVIEW
Peng Bao, Guo-Xiang Li, Guo-Xin Sun, Yao-Yang Xu, Andrew A Meharg, Yong-Guan Zhu
Sulfate-reducing prokaryotes (SRP) represent a diverse group of heterotrophic and autotrophic microorganisms that are ubiquitous in anoxic habitats. In addition to their important role in both sulfur and carbon cycles, SRP are important biotic and abiotic regulators of a variety of sulfur-driven coupled biogeochemical cycling of elements, including: oxygen, nitrogen, chlorine, bromine, iodine and metal(loid)s. SRP gain energy form most of the coupling of element transformation. Once sulfate-reducing conditions are established, sulfide precipitation becomes the predominant abiotic mechanism of metal(loid)s transformation, followed by co-precipitation between metal(loid)s...
February 1, 2018: Science of the Total Environment
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