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Cardiac pathology

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https://www.readbyqxmd.com/read/28731589/effects-of-nitric-oxide-on-large-conductance-ca-2-activated-k-currents-in-human-cardiac-fibroblasts-through-pka-and-pkg-related-pathways
#1
Hyemi Bae, Inja Lim
The human cardiac fibroblast (HCF) is the most abundant cell type in the myocardium, and HCFs play critical roles in maintaining normal cardiac function. However, unlike cardiomyocytes, the electrophysiology of HCFs is not well established. In the cardiovascular system, Ca(2+) -activated K(+) (KCa) channels have distinct physiological and pathological functions, and nitric oxide (NO) play key roles. In this study, we investigated the potential effects of NO on KCa channels in HCFs. We recorded strong oscillating, well-maintained outward K(+) currents without marked inactivation throughout the test pulse period and detected outward rectification in the I-V curve; these are all characteristics that are typical of KCa currents...
July 21, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28728073/sudden-perinatal-death-due-to-rupture-of-congenital-cardiac-diverticulum-pathological-findings-and-medico-legal-investigations-in-malpractice-charge
#2
Matteo Marchesi, Michele Boracchi, Guendalina Gentile, Francesca Maghin, Riccardo Zoja
Congenital diverticula of the left ventricle, very rare malformations, are determined by an abnormal embryonic development of the ventricular wall and can be isolated or associated to other cardiac anomalies. In most of the cases, these pathologies are not symptomatic and in some patients can be associated to ventricular arrhythmia, cardiac rupture with tamponade and sudden death. Authors are presenting the case of a sudden death in an 8-weeks-old newborn due to rupture of a cardiac congenital diverticulum of the left ventricle, discovered only at the moment of the autopsic examination...
July 12, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28726653/retrospective-study-of-evaluation-of-patients-with-st-elevation-myocardial-infarction-and-intact-coronary-arteries-evaluation-of-treatment-approaches-outcome-and-prognosis
#3
E Tsetskhladze, I Khintibidze
Myocardial infarction with normal coronary arteries is a well known pathology. It may or may not be associated with left ventricle wall motion abnormalities. Data was reviewed retrospectively for patients with ST elevation myocardial infarction who underwent cardiac catheterization. From the total number of patients evaluated 10.3% (17) patients had Myocardial Infarction with normal coronary arteries. Females were more likely to present with MINCA then males. Coronary flow was normal in 11 from 17 patients with MINCA...
June 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28726495/use-of-adeno-associated-virus-vector-for-cardiac-gene-delivery-in-large-animal-surgical-models-of-heart-failure
#4
Michael G Katz, Anthony S Fargnoli, Thomas Weber, Roger Hajjar, Charles Bridges
The advancement of gene-therapy-based approaches to treat heart disease represents a need for clinically-relevant animal models with characteristics equivalent to human pathologies. Rodent models of cardiac disease do not precisely reproduce heart failure phenotype and molecular defects. This has motivated researchers to use large animals whose heart size and physiological processes more similar and comparable to those of humans. Today, adeno-associated viruses (AAV)-based vectors are undoubtedly among the most promising DNA delivery vehicles...
July 20, 2017: Human Gene Therapy. Clinical Development
https://www.readbyqxmd.com/read/28725791/quality-improvement-intervention-for-reduction-of-redundant-testing
#5
Alan M Ducatman, Danyel H Tacker, Barbara S Ducatman, Dustin Long, Peter L Perrotta, Hannah Lawther, Kelly Pennington, Owen Lander, Mary Warden, Conard Failinger, Kevin Halbritter, Ronald Pellegrino, Marney Treese, Jeffrey A Stead, Eric Glass, Lauren Cianciaruso, Konrad C Nau
Laboratory data are critical to analyzing and improving clinical quality. In the setting of residual use of creatine kinase M and B isoenzyme testing for myocardial infarction, we assessed disease outcomes of discordant creatine kinase M and B isoenzyme +/troponin I (-) test pairs in order to address anticipated clinician concerns about potential loss of case-finding sensitivity following proposed discontinuation of routine creatine kinase and creatine kinase M and B isoenzyme testing. Time-sequenced interventions were introduced...
January 2017: Acad Pathol
https://www.readbyqxmd.com/read/28725306/histology-and-glutamine-synthetase-immunoreactivity-in-liver-biopsies-from-patients-with-congestive-heart-failure
#6
Bela Horvath, Lei Zhu, Daniela Allende, Hao Xie, John Guirguis, Michael Cruise, Deepa T Patil, Robert O'Shea, John Rivas, Reyna Yordanka, Nan Lan, Xiuli Liu
BACKGROUND: Long-standing congestive heart failure can induce a constellation of histopathology changes in the liver that can range from mild sinusoidal dilation to advanced fibrosis and loss of normal perivenular expression of glutamine synthetase (GS). Liver biopsies might be performed to assess the perioperative risk of these patients or to determine the need of synchronous liver transplant. We aimed to assess interobserver agreement in recognizing these liver histologic features in patients undergoing evaluation for heart transplantation and to examine whether immunohistochemistry of GS will aid the diagnosis of cardiac hepatopathy (CH)...
June 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28725213/can-brain-natriuretic-peptides-and-osteoprotegerin-serve-as-biochemical-markers-for-the-detection-of-aortic-pathology-in-children-and-adolescents-with-turner-syndrome
#7
REVIEW
Meenal Mavinkurve, Clodagh S O'Gorman
Turner syndrome (TS) is a chromosomal disorder that affects 1:2,000 females. It results from either the complete or partial loss of the X chromosome as well as other aberrations. Clinical features of TS include short stature, delayed puberty, and congenital cardiac malformations. TS children also have an increased prevalence of cardiometabolic risk factors, which predisposes them to complications like coronary artery disease, cerebrovascular-related deaths, and aortic dissection. Early cardiac imaging, such as echocardiography and cardiac magnetic resonance imaging, are recommended to detect underlying aortic pathology...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28724751/tomo-seq-identifies-sox9-as-a-key-regulator-of-cardiac-fibrosis-during-ischemic-injury
#8
Grégory P A Lacraz, Jan Philipp Junker, Monika M Gladka, Bas Molenaar, Koen T Scholman, Marta Vigil-Garcia, Danielle Versteeg, Hesther de Ruiter, Marit W Vermunt, Menno P Creyghton, Manon M H Huibers, Nicolaas de Jonge, Alexander van Oudenaarden, Eva van Rooij
Background -Cardiac ischemic injury induces a pathological remodeling response, which can ultimately lead to heart failure. Detailed mechanistic insights into molecular signaling pathways relevant for different aspects of cardiac remodeling will support the identification of novel therapeutic targets. Methods -While genome-wide transcriptome analysis on diseased tissues has greatly advanced our understanding of the regulatory networks that drive pathological changes in the heart, this approach has been disadvantaged by the fact that the signals are derived from tissue homogenates...
July 19, 2017: Circulation
https://www.readbyqxmd.com/read/28723764/increased-nuchal-translucency-in-fetuses-with-a-normal-karyotype-diagnosis-and-management-an-observational-study
#9
Demetra Socolov, Razvan Socolov, Vlad Eusebiu Gorduza, Tudor Butureanu, Ruxandra Stanculescu, Alexandru Carauleanu, Ioana Pavaleanu
The use of nuchal translucency (NT) in 1992 by Nicolaides et al was a major breakthrough in screening for chromosomal aneuploidies at the end of the first trimester. However, pathological conditions other than chromosomal aneuploidies are also associated with increased NT, which can also be detected in normal fetuses. This study sought to evaluate the causes of this ultrasound sign in a group of patients from Iasi, Romania.During the decade-long study period, there were 71 certified cases involving increased NT; the patients in these cases underwent diagnostic amniocentesis and karyotyping...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28720119/calcified-amorphous-tumor-of-the-heart-with-mitral-annular-calcification-a-case-report
#10
Ryo Nakamaru, Hiroki Oe, Katsuomi Iwakura, Takafumi Masai, Kenshi Fujii
BACKGROUND: Calcified amorphous tumor of the heart is a rare, non-neoplastic cardiac mass characterized by nodular calcium in the background of amorphous degenerating fibrinous material. Clinical diagnosis of calcified amorphous tumor can be difficult, and current single imaging techniques do not specifically differentiate calcified amorphous tumor from other cardiac tumors such as calcified atrial myxoma, calcified thrombi, or vegetation. Complete surgical resection is the treatment of choice for both symptom improvement and prevention of embolization, as well as for pathological diagnosis...
July 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28716987/control-of-pathological-cardiac-hypertrophy-by-transcriptional-corepressor-irf2bp2-interferon-regulatory-factor-2-binding-protein-2
#11
Jing Fang, Tianyu Li, Xuehai Zhu, Ke-Qiong Deng, Yan-Xiao Ji, Chun Fang, Xiao-Jing Zhang, Jun-Hong Guo, Peng Zhang, Hongliang Li, Xiang Wei
The transcription factor nuclear factor of activated T-cells 1 (NFAT1), with the aid of transcriptional coactivators, has been recognized for its necessity and sufficiency to drive pathological cardiac hypertrophy. However, how the transcriptional activity of NFAT1 in terms of cardiac hypertrophy is controlled at the transcriptional level has not been well defined. Herein, we showed that a cardiac-enriched protein IRF2BP2 (interferon regulatory factor-2 binding protein 2) was further upregulated in both human and mouse hypertrophied myocardium and negatively regulated cardiomyocyte hypertrophic response in vitro...
July 17, 2017: Hypertension
https://www.readbyqxmd.com/read/28716730/interaction-of-small-g-protein-signaling-modulator-3-with-connexin-43-contributes-to-myocardial-infarction-in-rat-hearts
#12
Chang Youn Lee, Jung-Won Choi, Sunhye Shin, Jiyun Lee, Hyang-Hee Seo, Soyeon Lim, Seahyoung Lee, Hyun-Chul Joo, Sang Woo Kim, Ki-Chul Hwang
Connexin 43 (Cx43), a ubiquitous connexin expressed in the heart and skin, is associated with a variety of hereditary conditions. Therefore, the characterization of Cx43-interacting proteins and their dynamics is important to understand not only the molecular mechanisms underlying pathological malfunction of gap junction-mediated intercellular communication but also to identify novel and unanticipated biological functions of Cx43. In the present study, we observed potential targets of Cx43 to determine new molecular functions in cardio-protection...
July 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28714932/thrombospondins-a-role-in-cardiovascular-disease
#13
REVIEW
Dimitry A Chistiakov, Alexandra A Melnichenko, Veronika A Myasoedova, Andrey V Grechko, Alexander N Orekhov
Thrombospondins (TSPs) represent extracellular matrix (ECM) proteins belonging to the TSP family that comprises five members. All TSPs have a complex multidomain structure that permits the interaction with various partners including other ECM proteins, cytokines, receptors, growth factors, etc. Among TSPs, TSP1, TSP2, and TSP4 are the most studied and functionally tested. TSP1 possesses anti-angiogenic activity and is able to activate transforming growth factor (TGF)-β, a potent profibrotic and anti-inflammatory factor...
July 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28713984/downregulation-of-microrna%C3%A2-199a%C3%A2-5p-protects-cardiomyocytes-in-cyanotic-congenital-heart-disease-by-attenuating-endoplasmic-reticulum-stress
#14
Yang Zhou, Wei-Kun Jia, Zhao Jian, Liang Zhao, Chen-Cheng Liu, Yong Wang, Ying-Bin Xiao
Chronic hypoxia is a key pathological change in patients with cyanotic congenital heart defect (CCHD). It has been demonstrated that enhanced myocardial unfolded protein response (UPR) increases the capacity to buffer endoplasmic reticulum (ER) stress and to avoid subsequent apoptosis caused by the hypoxia that underlies CCHD. The present study was performed to determine the regulatory role of microRNAs (miRNAs) in this cytoprotective UPR process. The results revealed that miR‑199a‑5p was markedly downregulated in the cardiac tissue of patients with CCHD and in human myocardial cells cultured in hypoxic conditions...
July 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713900/nlrc5-silencing-ameliorates-cardiac-fibrosis-by-inhibiting-the-tgf%C3%A2-%C3%AE-1-smad3-signaling-pathway
#15
Hongtao Zhou, Xuefang Yu, Guiming Zhou
The proliferation of cardiac fibroblasts (CFs) and excessive deposition of extracellular matrix are the predominant pathological characteristics of cardiac fibrosis. As the largest member of the nucleotide‑binding domain and leucine‑rich repeat (NLR) family, NLRC5 has been shown to be pivotal in the development of hepatic fibrosis. However, whether NLRC5 is involved in the pathogenesis of cardiac fibrosis remains to be elucidated. The present study aimed to investigate the role of NLRC5 and its mechanisms in regulating cardiac fibrosis...
July 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713489/the-inhibitory-effect-of-wenxinkeli-on-h9c2-cardiomyocytes-hypertrophy-induced-by-angiotensin-ii-through-regulating-autophagy-activity
#16
Jie Li, Yang Li, Ying Zhang, Dan Hu, Yonghong Gao, Hongcai Shang, Yanwei Xing
OBJECTIVES: We investigated the role of cardiomyocyte autophagy and its regulatory mechanisms by WenxinKeli (WXKL) in cells subjected to hypertrophy. METHODS: H9C2 cardiomyocytes were divided into 8 groups. Cytoskeletal proteins as well as endogenously expressed autophagy marker proteins were studied by confocal imaging. Western blotting was used to assess the levels of light chain-3 (LC3) and mechanistic target of rapamycin (mTOR). The cell viability assay was used to detect the content of ATP...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28713289/mitochondrial-vdac1-a-key-gatekeeper-as-potential-therapeutic-target
#17
REVIEW
Amadou K S Camara, YiFan Zhou, Po-Chao Wen, Emad Tajkhorshid, Wai-Meng Kwok
Mitochondria are the key source of ATP that fuels cellular functions, and they are also central in cellular signaling, cell division and apoptosis. Dysfunction of mitochondria has been implicated in a wide range of diseases, including neurodegenerative and cardiac diseases, and various types of cancer. One of the key proteins that regulate mitochondrial function is the voltage-dependent anion channel 1 (VDAC1), the most abundant protein on the outer membrane of mitochondria. VDAC1 is the gatekeeper for the passages of metabolites, nucleotides, and ions; it plays a crucial role in regulating apoptosis due to its interaction with apoptotic and anti-apoptotic proteins, namely members of the Bcl-2 family of proteins and hexokinase...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28711540/in-hospital-complications-following-lumbar-spine-surgery-in-patients-with-parkinson-s-disease-evaluation-of-the-national-inpatient-sample-database
#18
Joseph F Baker, Shearwood McClelland, Breton G Line, Justin S Smith, Robert A Hart, Christopher P Ames, Chris Shaffrey, Shay Bess
BACKGROUND: Previous reports suggest that patients with Parkinson's disease (PD) have increased complication rates following spine surgery however data from these reports are limited by small patient size. The aim of this study was to utilize the National Inpatient Sample (NIS) database to compare in-hospital complications for PD compared to patients without following elective lumbar spine surgery. METHODS: The NIS database was accessed to find patients who underwent lumbar spine surgery with and without a diagnosis of PD...
July 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28709769/exploring-the-mitochondrial-microrna-import-pathway-through-polynucleotide-phosphorylase-pnpase
#19
Danielle L Shepherd, Quincy A Hathaway, Mark V Pinti, Cody E Nichols, Andrya J Durr, Shruthi Sreekumar, Kristen M Hughes, Seth M Stine, Ivan Martinez, John M Hollander
Cardiovascular disease is the primary cause of mortality for individuals with type 2 diabetes mellitus. During the diabetic condition, cardiovascular dysfunction can be partially attributed to molecular changes in the tissue, including alterations in microRNA (miRNA) interactions. MiRNAs have been reported in the mitochondrion and their presence may influence cellular bioenergetics, creating decrements in functional capacity. In this study, we examined the roles of Argonaute 2 (Ago2), a protein associated with cytosolic and mitochondrial miRNAs, and Polynucleotide Phosphorylase (PNPase), a protein found in the inner membrane space of the mitochondrion, to determine their role in mitochondrial miRNA import...
July 11, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28709760/clinical-and-pathologic-implications-of-extending-the-spectrum-of-maternal-autoantibodies-reactive-with-ribonucleoproteins-associated-with-cutaneous-and-now-cardiac-neonatal-lupus-from-ssa-ro-and-ssb-la-to-u1rnp
#20
REVIEW
Peter M Izmirly, Marc K Halushka, Avi Z Rosenberg, Sean Whelton, Khodayar Rais-Bahrami, Dilip S Nath, Hilary Parton, Robert M Clancy, Sara Rasmussen, Amit Saxena, Jill P Buyon
While the relationship between maternal connective tissue diseases and neonatal rashes was described in the 1960s and congenital heart block in the 1970s, the "culprit" antibody reactivity to the SSA/Ro-SSB/La ribonucleoprotein complex was not identified until the 1980s. However, studies have shown that approximately 10-15% of cases of congenital heart block are not exposed to anti-SSA/Ro-SSB/La. Whether those cases represent a different disease entity or whether another antibody is associated has yet to be determined...
July 11, 2017: Autoimmunity Reviews
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