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The role of iodine

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https://www.readbyqxmd.com/read/28545679/selective-use-of-radioactive-iodine-rai-in-thyroid-cancer-no-longer-one-size-fits-all
#1
REVIEW
J L Marti, L G T Morris, A S Ho
A remarkable, evidence-based trend toward de-escalation has reformed the practice of radioactive iodine (RAI) administration for thyroid cancer patients. Updated guidelines have supported both decreased RAI doses for select populations, as well as expanded definitions of low-risk and intermediate-risk patients that may not require RAI. Correspondingly, there is now increased flexibility for hemithyroidectomy without need for RAI, and relaxed TSH suppression targets for low-risk thyroidectomy patients. Clinical judgment remains indispensable where multiple risk factors co-exist that individually are not indications for RAI...
May 3, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28542075/examining-the-role-of-antimicrobial-irrigation-and-capsular-contracture-a-systematic-review-and-meta-analysis
#2
James J Drinane, Tayseer Chowdhry, Thuy-Huong Pham, Edmond Ritter
PURPOSE: The purpose of this study was to conduct a meta-analysis to determine if irrigation of breast implant pockets with antibiotics reduces the rate of capsular contracture (CC). Capsular contracture is the most common complication after primary augmentation mammoplasty, yet its etiology remains cryptogenic. METHODS: PubMed was searched for publications from January 1 of 2000 through October of 2015. Studies with the following criteria were included: primary breast augmentation with implants, use of antimicrobial irrigation (AMI), and documentation of CC...
May 24, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28540211/delayed-enhancement-cardiac-computed-tomography-for-the-assessment-of-myocardial-infarction-from-bench-to-bedside
#3
REVIEW
Gaston A Rodriguez-Granillo
A large number of studies support the increasingly relevant prognostic value of the presence and extent of delayed enhancement (DE), a surrogate marker of fibrosis, in diverse etiologies. Gadolinium and iodinated based contrast agents share similar kinetics, thus leading to comparable myocardial characterization with cardiac magnetic resonance (CMR) and cardiac computed tomography (CT) at both first-pass perfusion and DE imaging. We review the available evidence of DE imaging for the assessment of myocardial infarction (MI) using cardiac CT (CTDE), from animal to clinical studies, and from 16-slice CT to dual-energy CT systems (DECT)...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28534923/divergent-syntheses-of-iodinated-isobenzofuranones-and-isochromenones-by-iodolactonization-of-2-alkynylbenzoic-acids-in-ionic-liquids
#4
Raffaella Mancuso, Christian C Pomelli, Francesco Malafronte, Asif Maner, Nadia Marino, Cinzia Chiappe, Bartolo Gabriele
The regiochemical outcome of the iodolactonization of 2-alkynylbenzoic acids, carried out at 100 °C in ionic liquids (ILs) as unconventional solvents and with molecular iodine as the iodine source, in the absence of external bases, was found to be strongly dependent on the nature of the IL medium. In particular, while the use of N-ethyl-N-methylmorpholinium dicyanamide (Mor1,2N(CN)2) promoted the stereoselective formation of (E)-3-(iodomethylene)isobenzofuran-1(3H)-ones, through an anti-5-exo-dig cyclization route, the use of 1-ethyl-3-methylimidazolium ethyl sulfate (EmimEtSO4) tended to favor the 6-endo-dig cyclization mode, with preferential or selective formation of 4-iodo-1H-isochromen-1-ones...
May 23, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28532702/trimetazidine-in-the-prevention-of-contrast-induced-nephropathy-in-chronic-kidney-disease
#5
Tarek A Ibrahim, Ramzy H El-Mawardy, Ahmed S El-Serafy, Ehab M El-Fekky
BACKGROUND: Contrast induced nephropathy (CIN) may be defined as Acute Renal Failure (ARF) that occurs within 24-72h of exposure to intra-venous or intra-arterial iodinated contrast media that cannot be attributed to other causes. CIN occurs in up to 5% of hospitalized patients with normal renal function prior to injection of contrast media. It occurs more frequently in patients with renal impairment particularly if associated with diabetic nephropathy. Among all procedures utilizing contrast agents for either diagnostic or therapeutic purposes, coronary angiography and percutaneous coronary interventions are associated with the highest rates of CIN...
February 10, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28522155/fibroelastic-pseudotumour-elastofibroma-dorsi-detected-by-18-f-fdg-pet-ct-and-by-posttherapy-radioiodine-spect-ct
#6
M Oporto, F Cepa, N Orta, S Rubí, H Navalón, C Peña
Radioiodine uptake in the thyroid tissue, metastasis of differentiated thyroid cancer (DTC), and in other tissues, depends on the expression of sodium-iodide symporter (NIS). Vascular permeability, effusions, inflammation, and other mechanisms may also play a role in the accumulation of radioactive iodine. A 63-year-old woman underwent radioiodine therapy, as well as a post-therapy whole-body scan,as she was suspected of having lung metastasis from thyroid carcinoma. The scan not only showed uptake at the lung metastasis but also a faint diffuse bilateral uptake in the posterior thorax...
May 15, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28516979/interventional-sialendoscopy-for-radioiodine-induced-sialadenitis-quo-vadis
#7
P Canzi, S Cacciola, P Capaccio, F Pagella, A Occhini, L Pignataro, M Benazzo
Salivary gland toxicity is a common adverse effect of radioactive iodine ((131)I) for the treatment of thyroid cancers with a prevalence ranging from 2% to 67% of the (131)I exposed population. Recently, sialendoscopy has been introduced as an attractive diagnostic and therapeutic tool for management of patients with radioiodine-induced sialadenitis that is unresponsive to standard medical treatments. The objective of the current review was to assess the impact of this procedure on outcomes in patients suffering from radioiodine sialadenitis...
April 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28516817/decreased-but-still-sufficient-iodine-intake-of-children-and-adults-in-the-netherlands
#8
Janneke Verkaik-Kloosterman, Elly J M Buurma-Rethans, Arnold L M Dekkers, Caroline T M van Rossum
Sufficient I intake is important for the synthesis of thyroid hormones, which play an important role in normal growth and development. Our aim was to estimate habitual I intake for the Dutch population and the risk of inadequate or excessive intakes. Further, we aimed to provide an insight into the dietary sources of I and the association with socio-demographic factors. Data from the Dutch National Food Consumption Survey 2007-2010 (n 3819; 7-69 years), and from the Dutch food and supplement composition tables were used to estimate habitual I intake with a calculation model...
May 18, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28498333/hypervalent-iodine-reagents-in-high-valent-transition-metal-chemistry
#9
REVIEW
Felipe Cesar Sousa E Silva, Anthony F Tierno, Sarah E Wengryniuk
Over the last 20 years, high valent metal complexes have evolved from mere curiosities to being at the forefront of modern catalytic method development. This approach has enabled transformations complimentary to those possible via traditional manifolds, most prominently carbon-heteroatom bond formation. Key to the advancement of this chemistry has been the identification of oxidants that are capable of accessing these high oxidation state complexes. The oxidant has to be both powerful enough to achieve the desired oxidation as well as provide heteroatom ligands for transfer to the metal center; these heteroatoms are often subsequently transferred to the substrate via reductive elimination...
May 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28495233/sorption-and-speciation-of-iodine-in-groundwater-system-the-roles-of-organic-matter-and-organic-mineral-complexes
#10
Junxia Li, Hailing Zhou, Yanxin Wang, Xianjun Xie, Kun Qian
Characterizing the properties of main host of iodine in soil/sediment and the geochemical behaviors of iodine species are critical to understand the mechanisms of iodine mobilization in groundwater systems. Four surface soil and six subsurface sediment samples were collected from the iodine-affected area of Datong basin in northern China to conduct batch experiments and to evaluate the effects of NOM and/or organic-mineral complexes on iodide/iodate geochemical behaviors. The results showed that both iodine contents and kf-iodate values had positive correlations with solid TOC contents, implying the potential host of NOM for iodine in soil/sediment samples...
April 24, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28492198/comparison-of-efficacy-of-three-chemotherapeutic-agents-on-streptococcus-mutans-count-in-plaque-and-saliva-a-randomized-controlled-triple-blind-study
#11
Ajay Narayan, Savitha Satyaprasad, S Anandraj, S R Ananda, P Ananth Kamath, S Nandan
BACKGROUND: There is a need for exploration of the role of chemotherapeutic agents and its role in the prevention of early childhood caries (ECC) and its recurrence. AIM: The aim of this study was two-fold: (1) To compare the antimicrobial efficacy of three commonly used chemotherapeutic agents in the prevention of ECC in comparison with a control and (2) To ascertain the role of chemotherapeutic agents in the prevention of ECC. MATERIALS AND METHODS: Sixty children with ECC in the age group 3-6 years were randomly allocated into four groups...
April 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28473082/acr-appropriateness-criteria-%C3%A2-pulsatile-abdominal-mass-suspected-abdominal-aortic%C3%A2-aneurysm
#12
Stephen P Reis, Bill S Majdalany, Ali F AbuRahma, Jeremy D Collins, Christopher J Francois, Suvranu Ganguli, Heather L Gornik, A Tuba Kendi, Minhajuddin S Khaja, Patrick T Norton, Patrick D Sutphin, Frank J Rybicki, Sanjeeva P Kalva
Clinical palpation of a pulsating abdominal mass alerts the clinician to the presence of a possible abdominal aortic aneurysm (AAA). Imaging studies are important in diagnosing and categorizing the extent of the aneurysm and may aid in treatment planning. The consensus of the literature supports the use of ultrasound as the initial screening test in patients with suspected AAA. Population-based ultrasound screening studies have been recommended and have proved effective for male patients > 65 years of age...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28471242/low-radiation-dose-in-computed-tomography-the-role-of-iodine
#13
Andrik J Aschoff, Carlo Catalano, Miles A Kirchin, Martin Krix, Thomas Albrecht
Recent approaches to reducing radiation exposure during CT examinations typically utilize automated dose modulation strategies on the basis of lower tube voltage combined with iterative reconstruction and other dose-saving techniques. Less clearly appreciated is the potentially substantial role that iodinated contrast media (CM) can play in low-radiation-dose CT examinations. Herein we discuss the role of iodinated CM in low-radiation-dose examinations and describe approaches for the optimization of CM administration protocols to further reduce radiation dose and/or CM dose while maintaining image quality for accurate diagnosis...
May 4, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28469401/hepatocyte-growth-factor-c-met-axis-in-thyroid-cancer-from-diagnostic-biomarker-to-therapeutic-target
#14
REVIEW
Maria Trovato, Alfredo Campennì, Salvatore Giovinazzo, Massimiliano Siracusa, Rosaria Maddalena Ruggeri
The hepatocyte growth factor (HGF)/c-met axis plays a crucial role in cancer development by promoting cellular proliferation, motility, and morphogenesis, as well as angiogenesis. Different cellular distributions of both the ligand and the receptor in benign vs malignant lesions indicate this biological system as a candidate for a diagnostic biomarker of malignancy occurring in endocrine glands, such as the thyroid and pituitary. Furthermore, the HGF/c-met expression may help to identify a subset of patients eligible for potential targeted therapies with HGF/c-met inhibitors or antagonists in thyroid tumour, as well as in other malignancies...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28456207/the-importance-of-inner-shell-electronic-structure-for-enhancing-the-euv-absorption-of-photoresist-materials
#15
Kristina D Closser, D Frank Ogletree, Patrick Naulleau, David Prendergast
In order to increase computation power and efficiency, the semiconductor industry continually strives to reduce the size of features written using lithographic techniques. The planned switch to a shorter wavelength extreme ultraviolet (EUV) source presents a challenge for the associated photoresists, which in their current manifestation show much poorer photoabsorption cross sections for the same dose. Here we consider the critical role that an inner-shell electronic structure might play in enhancing photoabsorption cross sections, which one can control by the choice of substituent elements in the photoresist...
April 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28451096/photoredox-mediated-minisci-c-h-alkylation-of-n-heteroarenes-using-boronic-acids-and-hypervalent-iodine
#16
Guo-Xing Li, Christian A Morales-Rivera, Yaxin Wang, Fang Gao, Gang He, Peng Liu, Gong Chen
A photoredox-mediated Minisci C-H alkylation reaction of N-heteroarenes with alkyl boronic acids is reported. A broad range of primary and secondary alkyl groups can be efficiently incorporated into various N-heteroarenes using [Ru(bpy)3]Cl2 as photocatalyst and acetoxybenziodoxole as oxidant under mild conditions. The reaction exhibits excellent substrate scope and functional group tolerance, and offers a broadly applicable method for late-stage functionalization of complex substrates. Mechanistic experiments and computational studies suggest that an intramolecularly stabilized ortho-iodobenzoyloxy radical intermediate might play a key role in this reaction system...
October 1, 2016: Chemical Science
https://www.readbyqxmd.com/read/28435761/dual-energy-ct-in-head-and-neck-imaging
#17
REVIEW
Elise D Roele, Veronique C M L Timmer, Lauretta A A Vaassen, Anna M J L van Kroonenburgh, A A Postma
PURPOSE OF REVIEW: To explain the technique of Dual-energy CT (DECT) and highlight its applications and advantages in head and neck radiology. RECENT FINDINGS: Using DECT, additional datasets can be created next to conventional images. In head and neck radiology, three material decomposition algorithms can be used for improved lesion detection and delineation of the tumor. Iodine concentration measurements can aid in differentiating malignant from nonmalignant lymph nodes and benign posttreatment changes from tumor recurrence...
2017: Current Radiology Reports
https://www.readbyqxmd.com/read/28428640/transforming-growth-factor-%C3%AE-plays-an-important-role-in-enhancing-wound-healing-by-topical-application-of-povidone-iodine
#18
Li Wang, Wenhan Qin, Yaying Zhou, Bin Chen, Xiaoqing Zhao, Hailin Zhao, Emma Mi, Ella Mi, Qingmei Wang, Jiaolin Ning
Povidone-iodine (PVI) is principally used as an antimicrobial agent. It has been found that 0.5% PVI can attenuate congestion, edema and pain induced by pressure sores. Thus this study aimed to assess the effects of 0.5% PVI on acute skin wounds. Four full-thickness excisional wounds were generated on the dorsal skin of male Sprague-Dawley rats with a 10-mm sterile punch. Two wounds were left untreated and the other two were dressed with gauze with 0.5% PVI for 1 hour per day for the first 5 days after injury...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417080/applying-a-systems-approach-to-thyroid-physiology-looking-at-the-whole-with-a-mitochondrial-perspective-instead-of-judging-single-tsh-values-or-why-we-should-know-more-about-mitochondria-to-understand-metabolism
#19
REVIEW
Roy Moncayo, Helga Moncayo
Classical thinking in endocrine physiology squeezes our diagnostic handling into a simple negative feedback mechanism with a controller and a controlled variable. In the case of the thyroid this is reduced to TSH and fT3 and fT4, respectively. The setting of this tight notion has no free space for any additions. In this paper we want to challenge this model of limited application by proposing a construct based on a systems approach departing from two basic considerations. In first place since the majority of cases of thyroid disease develop and appear during life it has to be considered as an acquired condition...
June 2017: BBA Clinical
https://www.readbyqxmd.com/read/28413794/comparative-evaluation-of-iodine-131-metaiodobenzylguanidine-and-18-fluorodeoxyglucose-positron-emission-tomography-in-assessing-neural-crest-tumors-will-they-play-a-complementary-role
#20
Soumyakanti Kundu, Purushottam Kand, Sandip Basu
BACKGROUND: 18-Fluorodeoxyglucose positron emission tomography (FDG-PET) has established a role in the evaluation of several malignancies. However, its precise clinical role in the neural crest cell tumors continues to evolve. PURPOSE: The purpose of this study was to compare iodine-131 metaiodobenzylguanidine ((131)I-MIBG) and FDG-PET of head to head in patients with neural crest tumors both qualitatively and semiquantitatively and to determine their clinical utility in disease status evaluation and further management...
January 2017: South Asian Journal of Cancer
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