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https://www.readbyqxmd.com/read/28345934/amphiphilic-nucleating-agents-to-enhance-calcium-phosphate-growth-on-polymeric-surfaces
#1
Laura Caetano Escobar da Silva, Bruna Antunes Más, Eliana Aparecida de Rezende Duek, Richard Landers, Celso Aparecido Bertran, Maria Do Carmo Goncalves
Poly(ɛ-caprolactone) (PCL) is an aliphatic polyester widely explored in the preparation of guided bone regeneration (GBR) membranes due to its interesting mechanical properties and biodegradability. However, PCL high hydrophobicity often impairs cell adhesion and proliferation as well as calcium phosphate growth, all of which are crucial to achieve suitable bone-tissue integration. In this work, aiming to achieve less hydrophobic surfaces, amphiphilic molecules were added at low concentrations to the polymeric dope solutions that generated the GBR membranes...
March 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28345316/the-implication-of-coronary-artery-calcium-testing-for-cardiovascular-disease-prevention-and-diabetes
#2
REVIEW
Ron Blankstein, Ankur Gupta, Jamal S Rana, Khurram Nasir
Over the last two decades coronary artery calcium (CAC) scanning has emerged as a quick, safe, and inexpensive method to detect the presence of coronary atherosclerosis. Data from multiple studies has shown that compared to individuals who do not have any coronary calcifications, those with severe calcifications (i.e., CAC score >300) have a 10-fold increase in their risk of coronary heart disease events and cardiovascular disease. Conversely, those that have a CAC of 0 have a very low event rate (~0.1%/year), with data that now extends to 15 years in some studies...
March 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28345303/arterial-ageing-from-endothelial-dysfunction-to-vascular-calcification
#3
M Tesauro, A Mauriello, V Rovella, M Annicchiarico-Petruzzelli, C Cardillo, G Melino, N Di Daniele
Complex structural and functional changes occur in the arterial system with advancing age. The aged artery is characterized by changes in microRNA expression patterns, autophagy, smooth muscle cell migration and proliferation, and arterial calcification with progressively increased mechanical vessel rigidity and stiffness. With age the vascular smooth muscle cells modify their phenotype from contractile to 'synthetic' determining the development of intimal thickening as early as the second decade of life as an adaptive response to forces acting on the arterial wall...
March 27, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28343599/presence-characteristics-and-volumes-of-coronary-plaque-determined-by-computed-tomography-angiography-in-young-type-2-diabetes-mellitus
#4
Negin Nezarat, Matthew J Budoff, Yanting Luo, Sirous Darabian, Rine Nakanishi, Dong Li, Nasim Sheidaee, Michael Kim, Anas Alani, Suguru Matsumoto, Sina Rahmani, Mitsuru Kanisawa, Indre Ceponiene, Kazuhiro Osawa, Hong Qi, Sajad Hamal, Pieter Kitslaar, Alexander Broersen, Ferdinand Flores, Eli Ipp, Bahram Khazai
Prevention and management of coronary artery disease (CAD) is of great concern in patients with diabetes mellitus. Although the impact of coronary atherosclerosis is described well for subjects older than 40 years, the prevalence and types of coronary atherosclerosis in young patients are not well known. The aim of this study was to evaluate the prevalence, extent, severity, and volumes of coronary plaque in type 2 diabetes mellitus (T2DM) population younger than of 40 years. This prospective study enrolled 181 subjects (25-40 year old) undergoing coronary computed tomography angiography, with 86 T2DM and 95 nondiabetic age/gender-matched subjects...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28342135/pacap-protects-against-ethanol-and-nicotine-toxicity-in-sh-sy5y-cells-implications-for-drinking-smoking-co-morbidity
#5
Sridharan Manavalan, Bruk Getachew, Kebreten F Manaye, Syed J Khundmiri, Antonei B Csoka, Raechel McKinley, Andrea Tamas, Dora Reglodi, Yousef Tizabi
The detrimental effects of heavy drinking and smoking are multiplied when the two are combined. Treatment modalities for each and especially for the combination are very limited. Although in low concentration, alcohol and nicotine, each may have beneficial effects including neuroprotection, their combination, instead of providing additive protection, may actually lead to toxicity in cell cultures. Pituitary adenylate cyclase-activating polypeptide (PACAP) is an endogenous 38 amino-acid peptide with demonstrated protection against neuronal injury, trauma as well as various endogenous and exogenous toxic agents...
March 24, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28341734/development-of-a-modified-prognostic-index-of-patients-with-aggressive-adult-t-cell-leukemia-lymphoma-aged-70-years-or-younger-a-possible-risk-adapted-management-strategies-including-allogeneic-transplantation
#6
Shigeo Fuji, Takuhiro Yamaguchi, Yoshitaka Inoue, Atae Utsunomiya, Yukiyoshi Moriuchi, Kaoru Uchimaru, Satsuki Owatari, Takashi Miyagi, Jun Taguchi, Ilseung Choi, Eiichi Otsuka, Sawako Nakachi, Hisashi Yamamoto, Saiko Kurosawa, Kensei Tobinai, Takahiro Fukuda
Adult T-cell leukemia-lymphoma is a distinct type of peripheral T-cell lymphoma caused by human T-cell lymphotropic virus type I. Although allogeneic stem cell transplantation after chemotherapy is a recommended treatment option for patients with aggressive adult T-cell leukemia-lymphoma, there is no consensus about indications for allogeneic stem cell transplantation because there is no established risk stratification system for transplant eligible patients. We conducted a nationwide survey of patients with aggressive adult T-cell leukemia-lymphoma to construct a new large database that includes 1,792 patients aged 70 years or younger with aggressive adult T-cell leukemia-lymphoma who were diagnosed between 2000 and 2013 and received intensive first-line chemotherapy...
March 24, 2017: Haematologica
https://www.readbyqxmd.com/read/28339498/enhancement-of-osteogenic-differentiation-of-rat-adipose-tissue-derived-mesenchymal-stem-cells-by-zinc-sulphate-under-electromagnetic-field-via-the-pka-erk1-2-and-wnt-%C3%AE-catenin-signaling-pathways
#7
Ezzatollah Fathi, Raheleh Farahzadi
Zinc ion as an essential trace element and electromagnetic fields (EMFs) has been reported to be involved in the regulation of bone metabolism. The aim of this study was to elucidate the effects of zinc sulphate (ZnSO4) on the osteogenic differentiation of adipose tissue-derived mesenchymal stem cells (ADSCs) in the presence of EMF as a strategy in osteoporosis therapy. Alkaline phophatase (ALP) activity measurement, calcium assay and expression of several osteoblastic marker genes were examined to assess the effect of ZnSO4 on the osteogenic differentiation of ADSCs under EMF...
2017: PloS One
https://www.readbyqxmd.com/read/28338895/photosynthesis-nutrient-accumulation-and-growth-of-two-betula-species-exposed-to-waterlogging-in-late-dormancy-and-in-the-early-growing-season
#8
Ai-Fang Wang, Marja Roitto, Tarja Lehto, Sirkka Sutinen, Jaakko Heinonen, Gang Zhang, Tapani Repo, Ram Oren
Increased risk of soil waterlogging in winter and spring at northern latitudes will potentially affect forest production in the future. We studied gas exchange, chlorophyll content index, chlorophyll fluorescence, nutrient concentration and biomass accumulation in 1-year-old silver (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings. We hypothesized that B. pubescens has different physiological mechanisms that make it tolerate waterlogging better than B. pendula. The treatments were: (i) no waterlogging throughout the experiment; (ii) 4-week waterlogging during dormancy (dormancy waterlogging 'DW'); (iii) 4-week waterlogging during the early growing season (growth waterlogging 'GW'); and (iv) 4-week DW followed by 4-week GW during the early growing season ('DWGW')...
March 15, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338737/retinol-binding-protein-4-and-lipids-prospectively-measured-during-early-to-mid-pregnancy-in-relation-to-preeclampsia-and-preterm-birth-risk
#9
Pauline Mendola, Akhgar Ghassabian, James L Mills, Cuilin Zhang, Michael Y Tsai, Aiyi Liu, Edwina H Yeung
BACKGROUND: Maternal retinol-binding protein 4 (RBP4) and lipids may relate to preeclampsia and preterm birth risk but longitudinal data are lacking. This study examines these biomarkers longitudinally during pregnancy in relation to preeclampsia and preterm birth risk. METHODS: Maternal serum samples from the Calcium for Preeclampsia Prevention (CPEP) trial were analyzed at baseline: average 15 gestational weeks; mid-pregnancy: average 27 weeks; and at >34 weeks...
February 16, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28338063/greater-postprandial-glucose-excursions-and-inadequate-nutrient-intake-in-youth-with-type-1-diabetes-and-celiac-disease
#10
Anna Pham-Short, Kim C Donaghue, Geoffrey Ambler, Sarah Garnett, Maria E Craig
The gluten free diet (GFD) has a high glycemic index and low-fiber content, which potentially influences glycemic excursions in type 1 diabetes (T1D) and celiac disease (CD). Participants in this case-control study of youth with T1D+CD (n = 10) and T1D only (n = 7) wore blinded continuous glucose monitoring systems for six days. Blood glucose levels (BGLs) were compared between groups for each meal, including pre-meal, peak, 2-hour postprandial and time-to-peak. Participants consumed a test-breakfast of GF cereal and milk for three days and kept weighed food diaries; nutrient intake was analyzed and compared to national recommendations...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336549/eavk-segment-c-sequence-confers-ca-2-dependent-changes-to-the-kinetics-of-full-length-human-ano1
#11
Peter R Strege, Simon J Gibbons, Amelia Mazzone, Cheryl E Bernard, Arthur Beyder, Gianrico Farrugia
Anoctamin1 (Ano1, TMEM16A) is a calcium-activated chloride channel specifically expressed in interstitial cells of Cajal (ICC) of the gastrointestinal (GI) tract muscularis propria. Ano1 is necessary for normal electrical slow waves and ICC proliferation. The full length human Ano1 sequence includes an additional exon, exon "0," at the N-terminus. Ano1 with exon "0" (Ano1(0)) had a lower EC50 for intracellular calcium ([Ca(2+)]i) and faster chloride current (ICl) kinetics. The Ano1 alternative splice variant with segment "c" encoding exon 13 expresses on the first intracellular loop four additional amino acid residues, EAVK, which alter ICl at low [Ca(2+)]i Exon 13 is expressed in 75-100% of Ano1 transcripts in most human tissues but only 25% in human stomach...
March 23, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28336114/paradoxical-aortic-stenosis-a-systematic-review
#12
Rita Cavaca, Rogério Teixeira, Maria João Vieira, Lino Gonçalves
Aortic stenosis (AS) is a complex systemic valvular and vascular disease with a high prevalence in developed countries. The new entity "paradoxical low-flow, low-gradient aortic stenosis" refers to cases in which patients have severe AS based on assessment of aortic valve area (AVA) (≤1 cm(2)) or indexed AVA (≤0.6 cm(2)/m(2)), but paradoxically have a low mean transvalvular gradient (<40 mmHg) and a low stroke volume index (≤35 ml/m(2)), despite preserved left ventricular ejection fraction (≥50%)...
March 20, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28335787/risk-factors-of-atherosclerotic-tissue-types-in-single-vessel-and-intermediate-coronary-lesions-a-cross-sectional-study
#13
Xianjin Wang, Qun Chen, Yu Xu, Yanqing Wang, Yang Yang, Ming Gu, Haihua Xu, Yanfang Zhao
BACKGROUND: Few data exist that correlate lesion-related risk factors such as conventional cardiovascular risks or lipoprotein-associated phospholipase A2 (Lp-PLA2) with tissue types within atherosclerotic plaques in patients with single-vessel and intermediate coronary lesions. METHODS: One hundred and ninety-two patients with single-vessel and intermediate coronary lesions were enrolled in a cross-sectional study and divided into two groups: stable angina pectoris (SAP) and acute coronary syndrome (ACS) groups...
March 23, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28332412/drug-safety-evaluation-of-parathyroid-hormone-for-hypocalcemia-in-patients-with-hypoparathyroidism
#14
Gemma Marcucci, Giuseppe Della Pepa, Maria Luisa Brandi
Hypoparathyroidism is a rare disorder characterized by low serum calcium levels and high serum phosphate levels. This disease is commonly treated with calcium supplements and active vitamin D metabolites or analogues, but large doses of these supplements are often utilized to relieve the symptoms caused by hypocalcemia, without guarantee of a physiological normalization of calcium-phosphate homeostasis. Areas covered: Several studies have investigated replacement therapy with recombinant human PTH [rhPTH (1-84) and rhPTH (1-34)] for subjects with hypoparathyroidism...
March 23, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28332248/citrate-attenuates-vascular-calcification-in-chronic-renal-failure-rats
#15
Yan Ou, Zengying Liu, Shuiqin Li, Xiaojing Zhu, Yan Lin, Jin Han, Zhaoyang Duan, Lining Jia, Baosong Gui
Vascular calcification (VC) is a major contributor of cardiovascular dysfunction in chronic renal failure (CRF). Citrate binds calcium and inhibits the growth of calcium crystals. This present study intends to evaluate the effect of citrate on VC in adenine-induced CRF rats. The rats were randomly divided into five groups: the control group, the citrate control group, model group, model rats with low-dose treatment of citrate (216 mg/kg) and model rats with high-dose treatment of citrate (746 mg/kg). The rats were euthanized at 5 weeks with their blood and aorta in detection...
March 23, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28332205/evidence-that-5-ht-stimulates-intracellular-ca-2-signalling-and-activates-pannexin-1-currents-in-type-ii-cells-of-the-rat-carotid-body
#16
Sindhubarathi Murali, Min Zhang, Colin A Nurse
Carotid body (CB) chemoreceptor (type I) cells can synthesize and release 5-hydroxytryptamine (5-HT) and increased autocrine-paracrine 5-HT2 receptor signalling contributes to sensory long-term facilitation during chronic intermittent hypoxia (CIH). However, recent studies suggest that adjacent glial-like type II cells can respond to CB paracrine signals by elevating intracellular calcium (Δ[Ca(2+) ]i ) and activating carbenoxolone-sensitive, ATP-permeable, pannexin-1 (Panx-1)-like channels. Here, using dissociated rat CB cultures, we found that 5-HT induced Δ[Ca(2+) ]i responses in a subpopulation of type I cells, and in most (∼67%) type II cells identified by their sensitivity to the P2Y2 receptor agonist, UTP...
March 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28332202/calcium-signalling-silencing-in-atrial-fibrillation
#17
Maura Greiser
Sub-cellular calcium signalling silencing is a novel and distinct cellular and molecular adaptive response to rapid cardiac activation. Calcium signalling silencing develops during short-term sustained rapid atrial activation as seen clinically during paroxysmal atrial fibrillation (AF). It is the first 'anti-arrhythmic' adaptive response in the setting of AF and appears to counteract the maladaptive changes that lead to intracellular Ca(2+) signalling instability and Ca(2+) based arrhythmogenicity. Calcium signalling silencing results in a failed propagation of the [Ca(2+) ]i signal to the myocyte centre in both patients with AF and in a rabbit model...
March 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28330908/the-effect-of-dairy-intake-on-bone-mass-and-body-composition-in-early-pubertal-girls-and-boys-a-randomized-controlled-trial
#18
Kara A Vogel, Berdine R Martin, Linda D McCabe, Munro Peacock, Stuart J Warden, George P McCabe, Connie M Weaver
Background: Calcium retention increases with increasing body mass index (BMI) on recommended calcium intakes. Dairy foods are an excellent source of essential nutrients that are needed to increase bone mineral content (BMC) and potentially decrease fracture.Objective: We compared children who were overweight with children who were healthy weight for the accrual of bone mass in response to an extra 3 servings dairy/d compared with usual intake.Design: Participants were 240 healthy boys and girls (64%), aged 8-15...
March 22, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28330839/evolutionary-insights-into-t-type-ca-2-channel-structure-function-and-ion-selectivity-from-the-trichoplax-adhaerens-homologue
#19
Carolyn L Smith, Salsabil Abdallah, Yuen Yan Wong, Phuong Le, Alicia N Harracksingh, Liana Artinian, Arianna N Tamvacakis, Vincent Rehder, Thomas S Reese, Adriano Senatore
Four-domain voltage-gated Ca(2+) (Cav) channels play fundamental roles in the nervous system, but little is known about when or how their unique properties and cellular roles evolved. Of the three types of metazoan Cav channels, Cav1 (L-type), Cav2 (P/Q-, N- and R-type) and Cav3 (T-type), Cav3 channels are optimized for regulating cellular excitability because of their fast kinetics and low activation voltages. These same properties permit Cav3 channels to drive low-threshold exocytosis in select neurons and neurosecretory cells...
March 22, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28330145/enhanced-xylitol-production-using-immobilized-candida-tropicalis-with-non-detoxified-corn-cob-hemicellulosic-hydrolysate
#20
Tatyaso Yewale, Shruti Panchwagh, Srinivasan Rajagopalan, Pradip B Dhamole, Rishi Jain
This study reports an industrially applicable non-sterile xylitol fermentation process to produce xylitol from a low-cost feedstock like corn cob hydrolysate as pentose source without any detoxification. Different immobilization matrices/mediums (alginate, polyvinyl alcohol, agarose gel, polyacrylamide, gelatin, and κ-carrageenan) were studied to immobilize Candida tropicalis NCIM 3123 cells for xylitol production. Amongst this calcium alginate, immobilized cells produced maximum amount of xylitol with titer of 11...
June 2016: 3 Biotech
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