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Late Enhancement

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https://www.readbyqxmd.com/read/29052537/enhanced-ifn-%C3%AE-production-is-associated-with-increased-tlr7-retention-in-the-lysosomes-of-palasmacytoid-dendritic-cells-in-systemic-lupus-erythematosus
#1
Goh Murayama, Nanako Furusawa, Asako Chiba, Ken Yamaji, Naoto Tamura, Sachiko Miyake
BACKGROUND: Interferon-α (IFN-α) is increased and plays an important role in the pathogenesis of systemic lupus erythematosus (SLE). Plasmacytoid dendritic cells (pDCs) are the main producer of IFN-α, but their IFN-α producing capacity has been shown to be unchanged or reduced when stimulated with a Toll-like receptor 9 (TLR9) agonist in patients with SLE compared to in healthy individuals. In this study, we investigated the IFN-α-producing capacity of lupus pDCs under different stimulation...
October 19, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29052019/image-quality-improvements-using-adaptive-statistical-iterative-reconstruction-for-evaluating-chronic-myocardial-infarction-using-iodine-density-images-with-spectral-ct
#2
Junichi Kishimoto, Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Toshihide Ogawa
Single-source dual-energy CT (ssDECT) allows the reconstruction of iodine density images (IDIs) from projection based computing. We hypothesized that adding adaptive statistical iterative reconstruction (ASiR) could improve image quality. The aim of our study was to evaluate the effect and determine the optimal blend percentages of ASiR for IDI of myocardial late iodine enhancement (LIE) in the evaluation of chronic myocardial infarction using ssDECT. A total of 28 patients underwent cardiac LIE using a ssDECT scanner...
October 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29051976/late-gadolinium-enhancement-on-cardiac-magnetic-resonance-imaging-is-associated-with-coronary-endothelial-dysfunction-in-patients-with-dilated-cardiomyopathy
#3
Mina Nakayama, Megumi Yamamuro, Seiji Takashio, Tomoaki Uemura, Naoki Nakayama, Kyoko Hirakawa, Seitaro Oda, Daisuke Utsunomiya, Koichi Kaikita, Seiji Hokimoto, Yasuyuki Yamashita, Yukiko Morita, Kazuo Kimura, Kouichi Tamura, Kenichi Tsujita
Myocardial fibrosis and coronary endothelial dysfunction are important determinants of outcome in patients with heart failure. However, the relationship of these factors in patients with dilated cardiomyopathy (DCM) is not fully understood. This study aimed to investigate the relationship between endothelium-dependent coronary vasomotor abnormality and late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (CMR) in patients with DCM. We examined 38 consecutive patients with DCM. All patients underwent CMR and the acetylcholine (ACh) provocation test using cardiac catheterization...
October 19, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29051728/exacerbation-of-brain-injury-by-post-stroke-exercise-is-contingent-upon-exercise-initiation-timing
#4
Fengwu Li, Xiaokun Geng, Hajra Khan, John T Pendy, Changya Peng, Xiaorong Li, Jose A Rafols, Yuchuan Ding
Accumulating evidence has demonstrated that post-stroke physical rehabilitation may reduce morbidity. The effectiveness of post-stroke exercise, however, appears to be contingent upon exercise initiation. This study assessed the hypothesis that very early exercise exacerbates brain injury, induces reactive oxygen species (ROS) generation, and promotes energy failure. A total of 230 adult male Sprague-Dawley rats were subjected to middle cerebral artery (MCA) occlusion for 2 h, and randomized into eight groups, including two sham injury control groups, three non-exercise and three exercise groups...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29050981/evolutional-change-in-epicardial-fat-and-its-correlation-with-myocardial-diffuse-fibrosis-in-heart-failure-patients
#5
Cho-Kai Wu, Hao-Yuan Tsai, Mao-Yuan M Su, Yi-Fan Wu, Juey-Jen Hwang, Jiunn-Lee Lin, Lian-Yu Lin, Jien-Jiun Chen
OBJECTIVES: The aim of this study was to characterize the characteristics of epicardial fat (EAT) in different stage heart failure (HF) patients and its relationship between cardiac fibrosis. BACKGROUND: EAT is visceral adipose tissue that possesses inflammatory properties. Inflammation and obesity are associated with cardiac fibrosis, but the relationship between cardiac fibrosis and EAT is unknown. METHODS: EAT volume was measured using cardiac magnetic resonance imaging (CMR) in 180 subjects: 58 patients with systolic HF, 63 patients with HF and preserved ejection fraction, and 59 patients without HF...
September 4, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29048460/cardiovascular-magnetic-resonance-imaging-in-patients-with-cardiac-implantable-electronic-devices-a-device-dependent-imaging-strategy-for-improved-image-quality
#6
Sebastian Hilbert, Cosima Jahnke, Susanne Loebe, Sabrina Oebel, Alexander Weber, Ricardo Spampinato, Sergio Richter, Michael Doering, Andreas Bollmann, Philipp Sommer, Gerhard Hindricks, Ingo Paetsch
Aims: To prospectively determine evaluability of routine cardiovascular magnetic resonance (CMR) diagnostic modules in a referral population of implanted rhythm device all-comers, and to establish a device-dependent CMR imaging strategy to achieve optimal image quality. Methods and results: One hundred and twenty-eight patients with cardiac implantable electronic devices [insertable cardiac monitoring system, n = 14; implantable loop-recorder, n = 21; pacemaker, n = 31; implantable cardioverter-defibrillator (ICD), n = 50; and cardiac resynchronization therapy defibrillator (CRT-D), n = 12] underwent clinically indicated CMR at 1...
October 18, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29047169/non-immediate-reading-skin-tests-and-prolonged-challenges-in-non-immediate-hypersensitivity-to-beta-lactams-in-children
#7
G Lezmi, F Alrowaishdi, A Bados-Albiero, P Scheinmann, J de Blic, C Ponvert
BACKGROUND: A minority of children reporting non-immediate reactions to beta-lactams (BLs) are allergic. Allergy workup usually includes late-reading (48-72h) skin tests (ST) and short (1-3 days) drug provocation tests (DPT), regardless of the chronology of the index reaction. The sensitivity of hyper-late-reading (≥ 6-7 days) ST and of prolonged DPT for the diagnosis of non-immediate hypersensitiviy to BLs are yet to be determined. OBJECTIVES: To establish the diagnostic values of late- and hyper-late-reading ST and of prolonged DPT in children reporting non-immediate reactions to BLs...
October 19, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/29045633/ventricular-arrhythmia-and-sudden-cardiac-death-in-fabry-disease-a-systematic-review-of-risk-factors-in-clinical-practice
#8
Shanat Baig, Nicky C Edward, Dipak Kotecha, Boyang Liu, Sabrina Nordin, Rebecca Kozor, James C Moon, Tarekegn Geberhiwot, Richard P Steeds
Fabry disease (FD) is an X-linked lysosomal storage disorder caused by deficiency of α-galactosidase A enzyme. Cardiovascular (CV) disease is a common cause of mortality in FD, in particular as a result of heart failure and arrhythmia, with a significant proportion of events categorized as sudden. There are no clear models for risk prediction in FD. This systematic review aims to identify the risk factors for ventricular arrhythmia (VA) and sudden cardiac deaths (SCD) in FD. A systematic search was performed following PRISMA guidelines of EMBASE, Medline, PubMed, Web of Science, and Cochrane from inception to August 2016, focusing on identification of risk factors for the development of VA or SCD...
October 17, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29044903/native-t1-mapping-for-characterization-of-acute-and-chronic-myocardial-infarction-in-swine-comparison-with-contrast-enhanced-mri
#9
Xi Liu, Jiang-Long Hou, Zhi-Gang Yang, Chun-Chao Xia, Lin-Jun Xie, Peng-Fei Ye, Wan-Lin Peng, Lei Li, Meng-Xi Yang, Ying-Kun Guo
BACKGROUND: Both acute and chronic myocardial infarction (AMI and CMI, respectively) exhibit delayed enhancement; however, clinical decision-making processes frequently require the differentiation of these two types of myocardial injury. PURPOSE: To investigate the reliability of AMI and CMI characterization using native T1 mapping and its feasibility for discriminating AMI from CMI. STUDY TYPE: Case-control. ANIMAL MODEL: The study cohort comprised 12 AMI (mean post-MI, 3...
October 16, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29044479/the-strategies-to-reduce-injuries-and-develop-confidence-in-elders-intervention-falls-risk-factor-assessment-and-management-patient-engagement-and-nurse-co-management
#10
David B Reuben, Priscilla Gazarian, Neil Alexander, Katy Araujo, Dorothy Baker, Jonathan F Bean, Chad Boult, Peter Charpentier, Pamela Duncan, Nancy Latham, Rosanne M Leipzig, Lisa M Quintiliani, Thomas Storer, Siobhan McMahon
In response to the epidemic of falls and serious falls-related injuries in older persons, in 2014, the Patient Centered Outcomes Research Institute (PCORI) and the National Institute on Aging funded a pragmatic trial, Strategies to Reduce Injuries and Develop confidence in Elders (STRIDE) to compare the effects of a multifactorial intervention with those of an enhanced usual care intervention. The STRIDE multifactorial intervention consists of five major components that registered nurses deliver in the role of falls care managers, co-managing fall risk in partnership with patients and their primary care providers (PCPs)...
October 17, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29043402/imaging-characterization-of-adnexal-lesions-do-ct-findings-correlate-with-us
#11
Akshay D Baheti, Cory E Lewis, Daniel S Hippe, Ryan B O'Malley, Carolyn L Wang
OBJECTIVE: To compare contrast-enhanced CT and US agreement in characterizing adnexal lesions in late post-menopausal women. MATERIALS AND METHODS: This was a HIPAA-compliant IRB-approved retrospective review of the contrast-enhanced CTs of 130 late post-menopausal women (> 55 years). The lesions were classified as simple cystic, minimally complex cystic, complex cystic, solid-cystic, or solid based on CT and US morphology. Findings were analyzed to evaluate agreement between CT and US on adnexal lesion characterization...
October 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29042929/quantitative-assessment-of-salvaged-myocardial-zone-and-intramyocardial-hemorrhage-using-non-contrast-faster-t2-mapping-in-a-rat-model-by-7t-mri
#12
Yan Zhang, Yini Xu, Lei Wang, Yushu Chen, Ruiqing Tian, Jun Jiao, Hong Xie, Li Yang, Fabao Gao
The aim of this study was to determine the myocardial area at risk (AAR), infarction-core size (IS) and the salvaged myocardial zone (SMZ), and to evaluate the imaging and histological characteristics of intramyocardial hemorrhage (IMH) after myocardial infarction using non-contrast T2 mapping on 7T magnetic resonance imaging (MRI). Twenty Sprague Dawley (SD) rats were randomly divided into the sham and model groups (n=10 in each). In the model group, myocardial infarction models were established by left anterior descending branch ligation...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29041862/impact-of-chronic-maternal-stress-during-early-gestation-on-maternal-fetal-stress-transfer-and-fetal-stress-sensitivity-in-sheep
#13
Michelle Dreiling, Rene Schiffner, Sabine Bischoff, Sven Rupprecht, Nasim Kroegel, Harald Schubert, Otto W Witte, Matthias Schwab, Florian Rakers
Acute stress-induced reduction of uterine blood flow (UBF) is an indirect mechanism of maternal-fetal stress transfer during late gestation. Effects of chronic psychosocial maternal stress (CMS) during early gestation, as may be experienced by many working women, on this stress signaling mechanism are unclear. We hypothesized that CMS in sheep during early gestation augments later acute stress-induced decreases of UBF, and aggravates the fetal hormonal, cardiovascular, and metabolic stress responses during later development...
October 18, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29039650/programmed-nanococktail-based-on-ph-responsive-function-switch-for-self-synergistic-tumor-targeting-therapy
#14
Yang Li, Liang Song, Jinyan Lin, Zhou Pan, Jinyuan Ma, Yinying Zhang, Guanghao Su, Shefang Ye, Fang-Hong Luo, Xuan Zhu, Zhenqing Hou
Tumor-targeting combination chemotherapy is an important way to improve the therapeutic index and reduce the side effects compared to traditional cancer treatments. However, one of the major challenges in surface functionalization of nanoparticle (NP) is accomplishing multiple purposes through one single ligand. Upon such consideration, methotrexate (MTX), an anticancer drug with a targeting moiety inspired by the similar structure of folate, could be used to covalently link with lipid-polymer conjugate (DSPE-PEG) via pH-sensitive dynamic covalent imine (CH=N) bond to synthesize the acid-induced function "Targeting-Anticancer" switching DSPE-PEG-CH=N-MTX...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29039519/runx3-plays-an-important-role-in-mediating-the-bmp9-induced-osteogenic-differentiation-of-mesenchymal-stem-cells
#15
Yufeng Wang, Qiaoling Feng, Caixia Ji, Xiaohua Liu, Li Li, Jinyong Luo
Although bone morphogenetic protein 9 (BMP9) is highly capable of promoting the osteogenic differentiation of mesenchymal stem cells (MSCs) both in vitro and in vivo, the molecular mechanisms involved remain to be fully elucidated. Runt-related transcription factor (RUNX)3 is an essential regulator of osteoblast/chondrocyte maturation. However, the exact role of RUNX3 in BMP9 osteoinductive activity is unknown. In this study, we sought to investigate the functional role of RUNX3 in the BMP9-induced osteogenic differentiation of MSCs...
September 27, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29039454/sox4-arrests-lung-development-in-rats-with-hyperoxia%C3%A2-induced-bronchopulmonary-dysplasia-by-controlling-ezh2-expression
#16
Bingting Pan, Xindong Xue, Dan Zhang, Mengyun Li, Jianhua Fu
Bronchopulmonary dysplasia (BPD) is currently the most common severe complication in premature infants and is characterized by the arrest of alveolar and vascular growth. Alveolar type II cells play an important role in the pathological foundation of BPD. An association of BPD with epithelial‑to‑mesenchymal transition (EMT) in type II cells exposed to hyperoxia was previously identified. SOX4, a transcription factor that is indispensable to embryogenesis, including lung development, participates in regulating EMT and cell survival, affecting tumorigenesis...
October 3, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29039113/a-gastric-glomus-tumor-resected-using-non-exposed-endoscopic-wall-inversion-surgery
#17
Masahide Ebi, Tomoya Sugiyama, Kazuhiro Yamamoto, Takuya Saito, Tadahisa Inoue, Yoshiharu Yamaguchi, Yasuhiro Tamura, Shinya Izawa, Yasutaka Hijikata, Yasushi Funaki, Naotaka Ogasawara, Makoto Sasaki, Kunio Kasugai
Gastric glomus tumors are extremely rare, constituting approximately 1% of gastric mesenchymal tumors. We report the case of a 45-year-old female patient in whom upper gastrointestinal endoscopy revealed a 3-cm submucosal tumor with a bridging fold in the posterior wall of the antrum of the stomach. Contrast-enhanced computed tomography revealed the tumor to be hypervascular in the arterial phase and exhibit continuous enhancement in the post-venous phase. Dynamic contrast-enhanced magnetic resonance imaging showed that the tumor was hypervascular in the early phase and persistently enhanced in the late phase...
October 16, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/29038584/dual-drug-containing-core-shell-nanoparticles-for-lung-cancer-therapy
#18
Jyothi U Menon, Aneetta Kuriakose, Roshni Iyer, Elizabeth Hernandez, Leah Gandee, Shanrong Zhang, Masaya Takahashi, Zhang Zhang, Debabrata Saha, Kytai T Nguyen
Late-stage diagnosis of lung cancer occurs ~95% of the time due to late manifestation of its symptoms, necessitating rigorous treatment following diagnosis. Existing treatment methods are limited by lack of specificity, systemic toxicity, temporary remission, and radio-resistance in lung cancer cells. In this research, we have developed a folate receptor-targeting multifunctional dual drug-loaded nanoparticle (MDNP) containing a poly(N-isopropylacrylamide)-carboxymethyl chitosan shell and poly lactic-co-glycolic acid (PLGA) core for enhancing localized chemo-radiotherapy to effectively treat lung cancers...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038245/mitochondrial-calcium-dysregulation-contributes-to-dendrite-degeneration-mediated-by-pd-lbd-associated-lrrk2-mutants
#19
Manish Verma, Jason Callio, P Anthony Otero, Israel Sekler, Zachary P Wills
Mutations in leucine-rich repeat kinase 2 (LRRK2) contribute to development of late-onset familial Parkinson's disease (PD), with clinical features of motor and cognitive dysfunction indistinguishable from sporadic PD. Calcium dysregulation plays an important role in PD pathogenesis, but the mechanisms of neurodegeneration remain unclear. Recent reports indicate enhanced excitatory neurotransmission in cortical neurons expressing mutant LRRK2, which occurs prior to the well-characterized phenotype of dendritic shortening...
October 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29038242/activity-dependent-facilitation-of-cav1-3-calcium-channels-promotes-kca3-1-activation-in-hippocampal-neurons
#20
Giriraj Sahu, Hadhimulya Asmara, Fang-Xiong Zhang, Gerald W Zamponi, Ray W Turner
CaV1 L-type calcium channels are key to regulating neuronal excitability, with the range of functional roles enhanced by interactions with calmodulin, accessory proteins, or CaMKII that modulate channel activity. In hippocampal pyramidal cells a prominent elevation of CaV1 activity is apparent in late channel openings that can last for seconds following a depolarizing stimulus train. The current study tested the hypothesis that a reported interaction between CaV1.3 channels, the scaffolding protein densin, and CaMKII could generate a facilitation of channel activity that outlasts a depolarizing stimulus...
October 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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