keyword
MENU ▼
Read by QxMD icon Read
search

calcification calcified

keyword
https://www.readbyqxmd.com/read/28917869/high-aspect-ratio-phospho-calcified-rock-candy-like-cellulose-nanowhiskers-of-wastepaper-applicable-in-osteogenic-differentiation-of-hmscs
#1
Mohsen Shahrousvand, Fatemeh Ahmadi Tabar, Ehsan Shahrousvand, Amir Babaei, Mohammad Mahdi Hasani-Sadrabadi, Gity Mir Mohamad Sadeghi, Hafez Jafari, Ali Salimi
The aim of this study was to prepare cellulose nanowhiskers (CNWs) from wastepaper powder (WPP), as an environmentally friendly approach for obtaining the source material, which is a highly available and low-cost precursor for cellulose nanomaterial processing. Acid hydrolysis and calcification treatments were employed for extraction of CNWs and preparation of novel phospho-calcified cellulose nanowhiskers (PCCNWs). CNWs and PCCNWs were analyzed through optical microscopy (OM), scanning electron microscopy (SEM), Fourier-transformed infrared spectra (FTIR) and X-ray diffraction analysis (XRD)...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28913162/endobronchial-hamartoma-a-rare-structural-cause-of-chronic-cough
#2
Saman Ahmed, Ayesha Arshad, M Jeffery Mador
Pulmonary hamartomas are rare benign tumors consisting of multiple mesenchymal cell lines like cartilage, bone and fat. We discuss an interesting case of a 53-year-old male patient, who was referred to our clinic for persistent cough. Chest X-ray revealed a left suprahilar density associated with plate like atelectasis, which on chest CT was found to be a densely calcified nodule, causing narrowing of the left upper lobe (LUL) bronchus with calcified bilateral hilar lymph nodes. A bronchoscopy revealed a smooth endobronchial mass with calcification, which was removed...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28901376/mechanical-loading-modulates-heterotopic-ossification-in-calcific-tendinopathy-through-the-mtorc1-signaling-pathway
#3
Guorong Chen, Huaji Jiang, Xinggui Tian, Jiajun Tang, Xiaochun Bai, Zhongmin Zhang, Liang Wang
Excessive mechanical loading is a major factor affecting heterotopic ossification (HO), which is a major pathological alteration in calcific tendinopathy. However, physical therapies with mechanical loading as the functional element have exhibited promising results in the treatment of calcific tendinopathy. The dual effects that mechanical loading may have on the pathogenesis and rehabilitation of calcified tendinopathy remain unclear. The present study was designed to investigate the effects of mechanical loading on HO in calcific tendinopathy...
August 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28901023/mosasaurs-and-snakes-have-a-periodontal-ligament-timing-and-extent-of-calcification-not-tissue-complexity-determines-tooth-attachment-mode-in%C3%A2-reptiles
#4
Aaron R H LeBlanc, Denis O Lamoureux, Michael W Caldwell
Squamates present a unique challenge to our understanding of dental evolution in amniotes because they are the only extant tooth-bearing group for which a ligamentous tooth attachment is considered to be absent. This has led to the assumption that mammals and crocodilians have convergently evolved a ligamentous tooth attachment, composed of root cementum, periodontal ligament, and alveolar bone, whereas squamates are thought to possess a single bone of attachment tissue that fuses teeth to the jaws. The identity and homology of tooth attachment tissues between squamates, crocodilians, and mammals have thus been a focal point of debate for decades...
September 12, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28898190/renal-tumors-of-childhood-radiologic-pathologic-correlation-part-2-the-2nd-decade-from-the-radiologic-pathology-archives
#5
Ellen M Chung, Grant E Lattin, Kimberly E Fagen, Andrew M Kim, Michael A Pavio, Adam J Fehringer, Richard M Conran
Malignant renal tumors account for 7% of childhood cancers, and Wilms tumors are by far the most common-but not in older children and adolescents. Among individuals in the latter half of their 2nd decade of life, renal cell carcinoma (RCC) is more common than Wilms tumor. The histopathologic spectrum of RCCs in children differs from that in adults. The most common subtype of RCC in children and adolescents is Xp11.2 translocation RCC, which is distinguished by hyperattenuation at nonenhanced computed tomography, a defined capsule, and associated retroperitoneal lymphadenopathy...
September 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28894330/metastatic-pulmonary-calcification-high-resolution-computed-tomography-findings-in-23-cases
#6
Luciana Camara Belém, Carolina A Souza, Arthur Soares Souza, Dante Luiz Escuissato, Bruno Hochhegger, Luiz Felipe Nobre, Rosana Souza Rodrigues, Antônio Carlos Portugal Gomes, Claudio S Silva, Marcos Duarte Guimarães, Gláucia Zanetti, Edson Marchiori
OBJECTIVE: The aim of this study was to evaluate the high-resolution computed tomography (HRCT) findings in patients diagnosed with metastatic pulmonary calcification (MPC). MATERIALS AND METHODS: We retrospectively reviewed the HRCT findings from 23 cases of MPC [14 men, 9 women; mean age, 54.3 (range, 26-89) years]. The patients were examined between 2000 and 2014 in nine tertiary hospitals in Brazil, Chile, and Canada. Diagnoses were established by histopathologic study in 18 patients and clinical-radiological correlation in 5 patients...
July 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28894174/in-vivo-ph-measurement-at-the-site-of-calcification-in-an-octocoral
#7
C Le Goff, E Tambutté, A A Venn, N Techer, D Allemand, S Tambutté
Calcareous octocorals are ecologically important calcifiers, but little is known about their biomineralization physiology, relative to scleractinian corals. Many marine calcifiers promote calcification by up-regulating pH at calcification sites against the surrounding seawater. Here, we investigated pH in the red octocoral Corallium rubrum which forms sclerites and an axial skeleton. To achieve this, we cultured microcolonies on coverslips facilitating microscopy of calcification sites of sclerites and axial skeleton...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892961/calcium-on-mitral-valve-decipher-aetiopathogenesis
#8
Rohan P Parikh, Ashlesh Tiwari, Sunil Washimkar, Pradeep Deshmukh, Mukund Deshpande
We hereby describe an unusual case of a 17-year-old female with severe mitral regurgitation secondary to heavily calcified immobile valve leaflets. Along with the mitral valve, corneas were also calcified, due to congenital systemic metabolic disorder, distal renal tubular acidosis. Histopathology proved that there was no intrinsic pathology of the mitral valve. Congenital distal renal tubular acidosis with normokalemia presenting with severe mitral and corneal calcification is not known. This case notes important clinical features and is thought to add to the existing knowledge regarding the disease...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28886389/localized-constrictive-pericarditis-compressing-and-obstructing-the-right-ventricular-inflow-tract-due-to-a-giant-anterior-calcified-cardiac-mass-a-case-report
#9
Klodian Krakulli, Edvin Prifti, Hortensa Gjergo, Endri Hasimi
INTRODUCTION: Localized pericardial constriction is a rare form of constrictive pericarditis CP. Depending on the CP location, clinical presentation may be variable, including compression and obstruction of right ventricular inflow tract(RVIT), coronary obstruction, or pulmonary stenosis. CASE PRESENTATION: A 72-year-old man presented a 2-year history of dyspnea and atrial fibrillation. A contrast enhanced angio computerized tomography clearly demonstrated a large spherical mass about 11×9×4cm in the anterior pericardium, presenting as a mediastinal tumor causing compression and obstruction of the RVIT...
August 25, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28886071/dynamics-of-the-aortic-annulus-in-4d-ct-angiography-for-transcatheter-aortic-valve-implantation-patients
#10
Mustafa A Elattar, Leon W Vink, Martijn S van Mourik, Jan Baan, Ed T vanBavel, R Nils Planken, Henk A Marquering
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is a well-established treatment for patients with severe aortic valve stenosis. This procedure requires pre-operative planning by assessment of aortic dimensions on CT Angiography (CTA). It is well-known that the aortic root dimensions vary over the heart cycle. However, sizing is commonly performed at either mid-systole or end-diastole only, which has resulted in an inadequate understanding of its full dynamic behavior. STUDY GOAL: We studied the variation in annulus measurements during the cardiac cycle and determined if this variation is dependent on the amount of calcification at the annulus...
2017: PloS One
https://www.readbyqxmd.com/read/28882712/joint-capsule-like-intracranial-osteochondroma-mimicking-cystic-meningioma
#11
Yusuke S Hori, Yuki Ebisudani, Mizuho Aoi
This report provides the first representative images of an intracranial osteochondroma with a cystic component mimicking cystic meningioma. A 40-year-old male presented at our outpatient clinic with decreased sensation in his right upper extremity. Preoperative computed tomography showed a tumor with a cystic-meningioma-like appearance and prominent calcifications. On magnetic resonance imaging, calcification of the lesion was suggested by the T2-weighted image; weak enhancement was seen on the T1-weighted image...
September 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28879673/response-of-preosteoblasts-to-titanium-with-periodic-micro-nanometer-scale-grooves-produced-by-femtosecond-laser-irradiation
#12
Peng Chen, Masayoshi Miyake, Masahiro Tsukamoto, Yusuke Tsutsumi, Takao Hanawa
To investigate the cellular response to designed topography in vitro, we studied the adhesion, proliferation, osteogenic differentiation, and calcification of mouse preosteoblasts (MC3T3-E1) cultured on titanium (Ti) surfaces with periodic micrometer scale grooves containing nanometer scale ripples in the vertical direction fabricated by single-shot, femtosecond laser irradiation (fsTi). The surface composition and chemical state of fsTi were almost the same as those of mirror-polished Ti without femtosecond laser irradiation (mTi)...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28879064/measuring-coral-calcification-under-ocean-acidification-methodological-considerations-for-the-45-ca-uptake-and-total-alkalinity-anomaly-technique
#13
Stephanie Cohen, Thomas Krueger, Maoz Fine
As the oceans become less alkaline due to rising CO2 levels, deleterious consequences are expected for calcifying corals. Predicting how coral calcification will be affected by on-going ocean acidification (OA) requires an accurate assessment of CaCO3 deposition and an understanding of the relative importance that decreasing calcification and/or increasing dissolution play for the overall calcification budget of individual corals. Here, we assessed the compatibility of the (45)Ca-uptake and total alkalinity (TA) anomaly techniques as measures of gross and net calcification (GC, NC), respectively, to determine coral calcification at pHT 8...
2017: PeerJ
https://www.readbyqxmd.com/read/28874210/ultrastructural-elemental-and-mineralogical-analysis-of-vascular-calcification-in-atherosclerosis
#14
Ida Perrotta, Edoardo Perri
Over the past few decades, remarkable progress has been achieved in terms of understanding the molecular and cellular mechanisms of atherosclerotic vascular calcification and the important role of matrix vesicles in initiating and propagating pathologic tissue mineralization has been widely recognized. Despite these recent advances, however, no definitive data are currently available regarding the texture and composition of the minerals that grow in the vessel wall during the course of the disease. Using different electron microscopy imaging and analysis, we demonstrate that vascular cells can produce and secrete more than one type of matrix vesicles which act as sites for initial mineral deposition independently of their structural features...
September 6, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28867375/calcified-plaque-modification-alters-local-drug-delivery-in-the-treatment-of-peripheral-atherosclerosis
#15
Abraham R Tzafriri, Fernando Garcia-Polite, Brett Zani, James Stanley, Benny Muraj, Jennifer Knutson, Robert Kohler, Peter Markham, Alexander Nikanorov, Elazer R Edelman
BACKGROUND: Calcific atherosclerosis is a major challenge to intraluminal drug delivery in peripheral artery disease (PAD). OBJECTIVES: We evaluated the effects of orbital atherectomy on intraluminal paclitaxel delivery to human peripheral arteries with substantial calcified plaque. METHODS: Diagnostic angiography and 3-D rotational imaging of five fresh human lower limbs revealed calcification in all main arteries. The proximal or distal segment of each artery was treated using an orbital atherectomy system (OAS) under simulated blood flow and fluoroscopy...
September 1, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28867263/effects-of-hyperthyroidism-on-coronary-artery-disease-a%C3%A2-computed-tomography-angiography-study
#16
Christoph Beyer, Fabian Plank, Guy Friedrich, Matthias Wildauer, Gudrun Feuchtner
BACKGROUND: Changes in thyroid hormone concentration can negatively affect the cardiovascular system. Subclinical hyperthyroidism has been linked to an increase of cardiovascular heart disease, however, clinical effects and significance are still uncertain. Therefore, we analyzed coronary computed tomography angiographies of patients with overt and subclinical hyperthyroidism for quantitative parameters and plaque morphology. METHODS: Seven hundred forty-four (47...
July 17, 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28866908/high-burden-of-coronary-atherosclerosis-in-patients-with-a-new-diagnosis-of-type-2-diabetes
#17
Monija Mrgan, Kristian L Funck, Sara Gaur, Kristian A Øvrehus, Damini Dey, Martin W Kusk, Bjarne L Nørgaard, Jørgen B Gram, Michael H Olsen, Jeppe Gram, Niels Peter R Sand
PURPOSE: The purposes of this study were to compare the presence, extent and composition of coronary plaques in asymptomatic patients with newly diagnosed type 2 diabetes to age- and sex-matched controls. METHODS: Patients with newly diagnosed (<1 year) type 2 diabetes ( n = 44) and controls ( n = 44) underwent contrast-enhanced coronary computed tomography angiography. Advanced plaque analysis including total plaque volume and volumes of plaque components (calcified plaque and non-calcified plaque, including low-attenuation [low-density non-calcified plaque]) was performed using validated semi-automated software...
September 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28865326/hydrogen-sulfide-attenuates-calcification-of-vascular-smooth-muscle-cells-via-keap1-nrf2-nqo1-activation
#18
Parisa Aghagolzadeh, Ramin Radpour, Matthias Bachtler, Harry van Goor, Edward R Smith, Adam Lister, Alex Odermatt, Martin Feelisch, Andreas Pasch
BACKGROUND AND AIMS: Vascular calcification is a common health problem related to oxidative stress, inflammation, and circulating calciprotein particles (CPP). Hydrogen sulfide is an endogenous signaling molecule with antioxidant properties and potential for drug development targeting redox signaling. Yet, its molecular mechanisms of action in vascular smooth muscle cell (VSMC) calcification have not been delineated. We therefore sought to identify key pathways involved in the calcification-inhibitory properties of sulfide employing our recently developed CPP-induced VSMC calcification model...
August 19, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28860893/calcification-remodeling-index-characterized-by-cardiac-ct-as-a-novel-parameter-to-predict-the-use-of-rotational-atherectomy-for-coronary-intervention-of-lesions-with-moderate-to-severe-calcification
#19
Mengmeng Yu, Yuehua Li, Wenbin Li, Zhigang Lu, Meng Wei, Jiayin Zhang
OBJECTIVE: To assess the feasibility of calcification characterization by coronary computed tomography angiography (CCTA) to predict the use of rotational atherectomy (RA) for coronary intervention of lesions with moderate to severe calcification. MATERIALS AND METHODS: Patients with calcified lesions treated by percutaneous coronary intervention (PCI) who underwent both CCTA and invasive coronary angiography were retrospectively included in this study. Calcification remodeling index was calculated as the ratio of the smallest vessel cross-sectional area of the lesion to the proximal reference luminal area...
September 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28856423/longitudinal-cracking-with-a-guidewire-tail-for-extremely-calcified-lesions-in-infrainguinal-arteries-picking-technique
#20
Osami Kawarada, Teruo Noguchi, Satoshi Yasuda
PURPOSE: To report a percutaneous intravascular cracking with a guidewire tail (PICKING) technique to longitudinally crack the underlying calcification and facilitate the balloon catheter passage for the treatment of severely calcified chronic occlusions in the infrainguinal artery. MATERIALS AND METHODS: Three patients underwent PICKING technique between November 2014 and March 2017. The PICKING technique with the stiff tail of 0.018-inch guidewire in the straight configuration was considered in cases of failed passage of the smallest balloon catheter because of the underlying severely calcified occlusion following passage of 0...
August 30, 2017: Cardiovascular and Interventional Radiology
keyword
keyword
96971
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"