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https://www.readbyqxmd.com/read/29242247/chip-regulates-aquaporin-2-quality-control-and-body-water-homeostasis
#1
Qi Wu, Hanne B Moeller, Donté A Stevens, Rebekah Sanchez-Hodge, Gabrielle Childers, Marleen L A Kortenoeven, Lei Cheng, Lena L Rosenbaek, Carrie Rubel, Cam Patterson, Trairak Pisitkun, Jonathan C Schisler, Robert A Fenton
The importance of the kidney distal convoluted tubule (DCT) and cortical collecting duct (CCD) is highlighted by various water and electrolyte disorders that arise when the unique transport properties of these segments are disturbed. Despite this critical role, little is known about which proteins have a regulatory role in these cells and how these cells can be regulated by individual physiologic stimuli. By combining proteomics, bioinformatics, and cell biology approaches, we found that the E3 ubiquitin ligase CHIP is highly expressed throughout the collecting duct; is modulated in abundance by vasopressin; interacts with aquaporin-2 (AQP2), Hsp70, and Hsc70; and can directly ubiquitylate the water channel AQP2 in vitro shRNA knockdown of CHIP in CCD cells increased AQP2 protein t1/2 and reduced AQP2 ubiquitylation, resulting in greater levels of AQP2 and phosphorylated AQP2...
December 14, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29240959/evaluation-of-left-ventricular-function-in-overweight-children-and-teenagers-with-arterial-hypertension-and-white-coat-hypertension
#2
Tomasz Florianczyk, Malgorzata Golabek-Dylewska, Beata Kucinska, Bozena Werner
BACKGROUND: Obesity in childhood is strongly associated with elevated arterial blood pressure and risk of hypertension. The aim of the study was the evaluation of left ventricular function in hypertensive and white coat hypertensive overweight children and teenagers. METHODS: The study group consisted of 74 overweight patients aged 10.3 ± 3.1 years (range: 6-16 years) diagnosed as hypertensive in standard blood pressure measurement. The control group consisted of 31 normotensive and normoweight children...
December 14, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/29237822/potassium-regulated-distal-tubule-wnk-bodies-are-kidney-specific-wnk1-dependent
#3
Cary R Boyd-Shiwarski, Daniel J Shiwarski, Ankita Roy, Lubika J Nkashama, Hima N Namboodiri, Jian Xie, Kara L McClain, Allison Marciszyn, Thomas R Kleyman, Roderick J Tan, Donna B Stolz, Manojkumar A Puthenveedu, Chou-Long Huang, Arohan R Subramanya
With-No-Lysine (WNK) kinases coordinate volume and potassium homeostasis by regulating renal tubular electrolyte transport. In the distal convoluted tubule (DCT), potassium imbalance causes WNK signaling complexes to concentrate into large discrete foci, which we call "WNK bodies." Though these structures have been reported previously, the mechanisms that drive their assembly remain obscure. Here, we show that kidney-specific WNK1 (KS-WNK1), a truncated kinase-defective WNK1 isoform that is highly expressed in the DCT, is critical for WNK body formation...
December 13, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29232519/using-density-based-indexes-and-wavefunction-methods-for-the-description-of-excited-states-excited-state-proton-transfer-reactions-as-test-case
#4
Juan Sanz García, Federica Maschietto, Marco Campetella, Ilaria Ciofini
To provide tools to interpret photochemical reactions, in this paper we demonstrate how a recently developed density-based index (DCT), up to now used in conjunction with Time Dependent Density Functional Theory methods, can be extended to multi-configurational methods. This index can guide chemists in the interpretation of photochemical reactions providing a measure of the spatial extent of a photo-induced charge transfer and, more generally, of charge transfer phenomena. This qualitative and quantitative description can be particularly relevant in the case of multi-configurational calculations providing a simple tool for the interpretation of their complex outputs...
December 12, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29229326/quantifying-the-effect-of-3t-magnetic-resonance-imaging-residual-system-distortions-and-patient-induced-susceptibility-distortions-on-radiation-therapy-treatment-planning-for-prostate-cancer
#5
Mary Adjeiwaah, Mikael Bylund, Josef A Lundman, Camilla Thellenberg Karlsson, Joakim H Jonsson, Tufve Nyholm
PURPOSE: To investigate the effect of magnetic resonance system- and patient-induced susceptibility distortions from a 3T scanner on dose distributions for prostate cancers. METHODS AND MATERIALS: Combined displacement fields from the residual system and patient-induced susceptibility distortions were used to distort 17 prostate patient CT images. VMAT dose plans were initially optimized on distorted CT images and the plan parameters transferred to the original patient CT images to calculate a new dose distribution...
October 20, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29181266/gender-differences-in-st-elevation-myocardial-infarction-stemi-time-delays-experience-of-a-public-health-service-in-salvador-brazil
#6
Andre R Duraes, Yasmin Sl Bitar, Ana Carolina T Freitas, Ivan Mp Filho, Beatriz C Freitas, Andre Ms Fernandez
BACKGROUND: Delays in attending to ST-elevation myocardial infarction (STEMI) are indicators or markers of quality of health services. Several records suggest gender disparity in cardiac care as a contributor to the increased mortality among women. METHODS: We prospectively enrolled all consecutive STEMI patients who were transferred to our hospital from January through December 2015. The following variables were analyzed: Symptom-to-Door Time (SDT); Time to First ECG (TECG); Transfer Time to Referring Center (TTRC); and Door-to-Cath lab time (DCT)...
2017: American Journal of Cardiovascular Disease
https://www.readbyqxmd.com/read/29177282/dense-monolayer-films-of-atomically-precise-graphene-nanoribbons-on-metallic-substrates-enabled-by-direct-contact-transfer-of-molecular-precursors
#7
Jacob D Teeter, Paulo S Costa, Percy Zahl, Timothy H Vo, Mikhail Shekhirev, Wenwu Xu, Xiao Cheng Zeng, Axel Enders, Alexander Sinitskii
Atomically precise graphene nanoribbons (GNRs) of two types, chevron GNRs and N = 7 straight armchair GNRs (7-AGNRs), have been synthesized through a direct contact transfer (DCT) of molecular precursors on Au(111) and gradual annealing. This method provides an alternative to the conventional approach for the deposition of molecules on surfaces by sublimation and simplifies preparation of dense monolayer films of GNRs. The DCT method allows deposition of molecules on a surface in their original state and then studying their gradual transformation to polymers to GNRs by scanning tunneling microscopy (STM) upon annealing...
November 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/29169235/hypermagnesuria-in-humans-following-acute-intravenous-administration-of-digoxin
#8
Nabil Abu-Amer, Eldar Priel, Steven J.D. Karlish, Zvi Farfel, Haim Mayan
Background: Hypomagnesemia is a known predisposing condition for the appearance of digitalis toxicity. The detection of a genetic form of Mg urinary wasting with hypomagnesemia being caused by a mutation in the γ subunit (FXYD2) of the Na,K-ATPase, the pharmacological target of Digoxin, prompted us to investigate whether Digoxin administration increases urinary Mg excretion. Methods: Two groups of subjects, with rapid atrial fibrillation, received intravenous Digoxin (n = 9) or verapamil (n = 8), for heart rate control...
October 30, 2017: Nephron
https://www.readbyqxmd.com/read/29145845/network-pharmacological-mechanisms-of-vernonia-anthelmintica-l-in-the-treatment-of-vitiligo-isorhamnetin-induction-of-melanogenesis-via-up-regulation-of-melanin-biosynthetic-genes
#9
Ji Ye Wang, Hong Chen, Yin Yin Wang, Xiao Qin Wang, Han Ying Chen, Mei Zhang, Yun Tang, Bo Zhang
BACKGROUND: Vitiligo is a long-term skin disease characterized by the loss of pigment in the skin. The current therapeutic approaches are limited. Although the anti-vitiligo mechanisms of Vernonia anthelmintica (L.) remain ambiguous, the herb has been broadly used in Uyghur hospitals to treat vitiligo. The overall objective of the present study aims to identify the potential lead compounds from Vernonia anthelmintica (L.) in the treatment of vitiligo via an oral route as well as the melanogenic mechanisms in the systematic approaches in silico of admetSAR and substructure-drug-target network-based inference (SDTNBI)...
November 16, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29125297/identification-of-protein-ligand-binding-sites-by-sequence-information-and-ensemble-classifier
#10
Yijie Ding, Jijun Tang, Fei Guo
Identifying protein-ligand binding sites is an important process in drug discovery and structure-based drug design. Detecting protein-ligand binding sites is expensive and time-consuming by traditional experimental methods. Hence, computational approaches provide many effective strategies to deal with this issue. Recently, lots of computational methods are based on structure information on proteins. However, these methods are limited in the common scenario, where both the sequence of protein target is known and sufficient 3D structure information is available...
November 21, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29123502/anaplastic-thyroid-cancer-in-sicily-the-role-of-environmental-characteristics
#11
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/29122955/dnpep-is-not-the-only-peptidase-that-produces-spak-fragments-in-kidney
#12
Rainelli Koumangoye, Eric Delpire
SPAK (STE20/SPS1-related proline/alanine-rich kinase) regulates Na(+) and Cl(-) reabsorption in the distal convoluted tubule, and possibly in the thick ascending limb of Henle. This kinase phosphorylates and activates the apical Na-Cl cotransporter in the DCT. Western blot analysis reveals that SPAK in kidney exists as a full-length protein as well as shorter fragments that might affect NKCC2 function in the TAL. Recently, we showed that kidney lysates exerts proteolytic activity towards SPAK, resulting in the formation of multiple SPAK fragments with possible inhibitory effects on the kinase...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29121864/comparative-transcriptome-and-dna-methylation-analyses-of-the-molecular-mechanisms-underlying-skin-color-variations-in-crucian-carp-carassius-carassius-l
#13
Yongqin Zhang, Jinhui Liu, Wen Fu, Wenting Xu, Huiqin Zhang, Shujuan Chen, Wenbin Liu, Liangyue Peng, Yamei Xiao
BACKGROUND: Crucian carp is a popular ornamental strain in Asia with variants in body color. To further explore the genetic mechanisms underlying gray and red body color formation in crucian carp, the skin transcriptomes and partial DNA methylation sites were obtained from red crucian carp (RCC) and white crucian carp (WCC). Here, we show significant differences in mRNA expression and DNA methylation sites between skin tissues of RCC and WCC. RESULTS: Totals of 3434 and 3683 unigenes had significantly lower and higher expression in WCC, respectively, compared with unigenes expressed in RCC...
November 9, 2017: BMC Genetics
https://www.readbyqxmd.com/read/29104631/ocular-pulse-amplitude-in-different-types-of-glaucoma-using-dynamic-contour-tonometry-diagnosis-and-follow-up-of-glaucoma
#14
Lingyan Cheng, Yuzhi Ding, Xuanchu Duan, Zhifeng Wu
The aim of the present study was to compare the ocular pulse amplitude (OPA) in patients with different types of glaucoma using dynamic contour tonometry (DCT), to evaluate ocular and systemic factors associated with the OPA and to verify whether OPA measured by DCT is an independent predictor for glaucoma diagnosis. A total of 217 eyes of 217 participants in the following five groups were included in this cross-sectional study: Chronic angle closure glaucoma (CACG), primary open angle glaucoma, normal tension glaucoma (NTG), suspected open angle glaucoma (SOAG) and normal control (NC)...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29101449/clinical-indication-for-computed-tomography-during-hepatic-arteriography-ctha-in-addition-to-dynamic-ct-studies-to-identify-hypervascularity-of-hepatocellular-carcinoma
#15
Tomoyo Fuji, Yuko Nakamura, Wataru Fukumoto, Kenji Kajiwara, Keigo Chosa, Chihiro Tani, Yoshiko Matsubara, Hiroaki Terada, Yukiko Honda, Koji Arihiro, Makoto Iida, Yasutaka Baba, Kazuo Awai
PURPOSE: To identify factors benefiting from computed tomography during hepatic arteriography (CTHA) in addition to dynamic CT studies at the preoperative evaluation of the hypervascularity of hepatocellular carcinoma (HCC). MATERIALS AND METHODS: We retrospectively divided 45 patients with HCC, who underwent both dynamic CT (dCT) and CTHA, into two groups based on the number of hypervascular HCCs identified on dCT and CTHA studies. In group A, the number of HCCs identified by dCT and CTHA was the same and additive CTHA had not been indicated...
November 3, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29095790/direct-contact-test-for-evaluating-bacterial-growth-on-machined-and-rough-surface-implants-an-in-vitro-study
#16
Shimshon Slutzkey, Ofer Moses, Haim Tal, Avi Meirowitz, Shlomo Matalon
OBJECTIVE: To use a modified direct contact test (DCT) to evaluate the bacterial growth on 3 commercially available implants. MATERIALS AND METHODS: Streptococcus salivarius growth was tested on 1 machined surface and 2 commercial rough surface implants. Seven implants from each group were fixed to the cover of a 96-well microtiter plate. Bacterial suspension was placed on each implant, and the plate was incubated at 37°C for 1 hour to allow the suspension fluid to evaporate...
December 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29066994/a-new-measurement-of-internet-addiction-using-diagnostic-classification-models
#17
Dongbo Tu, Xuliang Gao, Daxun Wang, Yan Cai
To obtain accurate, valid, and rich information from the questionnaires for internet addiction, a diagnostic classification test for internet addiction (the DCT-IA) was developed using diagnostic classification models (DCMs), a cutting-edge psychometric theory, based on DSM-5. A calibration sample and a validation sample were recruited in this study to calibrate the item parameters of the DCT-IA and to examine the sensitivity and specificity. The DCT-IA had high reliability and validity based on both CTT and DCMs, and had a sensitivity of 0...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29066894/poly-d-l-lactic-glycolic-acid-star-glucose-nanoparticles-for-glucose-transporter-and-hypoglycemia-mediated-tumor-targeting
#18
Ju-Hwan Park, Hyun-Jong Cho, Dae-Duk Kim
Poly((D,L)lactic-glycolic)acid-star glucose (PLGA-Glc) polymer-based nanoparticles (NPs) were fabricated for tumor-targeted delivery of docetaxel (DCT). NPs with an approximate mean diameter of 241 nm, narrow size distribution, negative zeta potential, and spherical shape were prepared. A sustained drug release pattern from the developed NPs was observed for 13 days. Moreover, drug release from PLGA-Glc NPs at acidic pH (endocytic compartments and tumor regions) was significantly improved compared with that observed at physiological pH (normal tissues and organs)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29062770/dependence-of-dynamic-contour-and-goldmann-applanation-tonometries-on-peripheral-corneal-thickness
#19
Federico Saenz-Frances, Claudia Sanz-Pozo, Lara Borrego-Sanz, Luis Jañez, Laura Morales-Fernandez, Jose Maria Martinez-de-la-Casa, Julian Garcia-Sanchez, Julian Garcia-Feijoo, Enrique Santos-Bueso
AIM: To determine the effects of peripheral corneal thickness (PCT) on dynamic contour tonometry(DCT) and Goldmann applanation tonometry (GAT). METHODS: A cross-sectional study. We created a software which calculates the corneal contour (CC) as a function of the radius from the corneal apex to each pixel of the contour. The software generates a central circumference with a radius of 1 mm and the remainder of the cornea is segmented in 5 rings concentric with corneal apex being its diameter not constant around the corneal circumference as a consequence of the irregular CC but keeping constant the diameter of each ring in each direction of the contour...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29061525/characterization-of-a-new-inducible-transgenic-mouse-model-with-gfp-expression-in-melanocytes-and-their-precursors
#20
Sandeep S Joshi, Bishal Tandukar, Maira Castaneda, Shunlin Jiang, Ganesh Diwakar, Ronna P Hertzano, Thomas J Hornyak
Melanocytes are neural crest-derived cells that are responsible for mammalian hair follicle (HF) pigmentation. The Dct-LacZ transgenic mouse is extensively used to study melanocyte biology but lacks conditionally-inducible labelling and fluorescent labelling, enabling specific, viable isolation of melanocytes using fluorescence-activated cell sorting (FACS). Here, we have generated a Tet-off bitransgenic mouse model, Dct-H2BGFP, containing Dct-tTA and TRE-H2BGFP transgenes. Characterization of Dct-H2BGFP mice confirmed a pattern of Dct-H2BGFP expression in melanoblasts, melanocyte stem cells (McSCs), and terminally differentiated melanocytes similar to the expression pattern of previously published mouse models Dct-LacZ and iDct-GFP...
October 21, 2017: Gene Expression Patterns: GEP
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