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Aortic pathology

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https://www.readbyqxmd.com/read/29456878/non-destructive-two-photon-excited-fluorescence-imaging-identifies-early-nodules-in-calcific-aortic-valve-disease
#1
Lauren M Baugh, Zhiyi Liu, Kyle P Quinn, Sam Osseiran, Conor L Evans, Gordon S Huggins, Philip W Hinds, Lauren D Black, Irene Georgakoudi
Calcifications occur during the development of healthy bone, and at the onset of calcific aortic-valve disease (CAVD) and many other pathologies. Although the mechanisms regulating early calcium deposition are not fully understood, they may provide targets for new treatments and for early interventions. Here, we show that two-photon excited fluorescence (TPEF) can provide quantitative and sensitive readouts of calcific nodule formation, in particular in the context of CAVD. Specifically, by means of the decomposition of TPEF spectral images from excised human CAVD valves and from rat bone prior to and following demineralization, as well as from calcific nodules formed within engineered gels, we identified an endogenous fluorophore that correlates with the level of mineralization in the samples...
November 2017: Nature Biomedical Engineering
https://www.readbyqxmd.com/read/29455772/prenatal-diagnosis-of-congenital-heart-disease-a-review-of-current-knowledge
#2
REVIEW
Nathalie Jeanne Bravo-Valenzuela, Alberto Borges Peixoto, Edward Araujo Júnior
This article reviews important features to improve the diagnosis of congenital heart disease (CHD) by applying ultrasound in prenatal cardiac screening. As low and high-risk pregnancies for CHD are subject to routine obstetric ultrasound, the diagnosis of structural heart defects represents a challenge that involves a team of specialists and subspecialists on fetal ultrasonography. In this review, the images highlight normal anatomy of the heart as well as pathologic cases consistent with cardiac malposition and isomerism, septal defects, pulmonary stenosis/atresia, aortic malformations, hypoplastic left ventricle, conotruncal anomalies, tricuspid dysplasia, and Ebstein's anomaly, and univentricular heart, among other congenital cardiovascular defects...
January 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29448104/aim2-regulates-vascular-smooth-muscle-cell-migration-in-atherosclerosis
#3
Jinyu Pan, Lu Lu, Xuyang Wang, Dian Liu, Jingjing Tian, Hui Liu, Mingjun Zhang, Fengqin Xu, Fengshuang An
BACKGROUND: Atherosclerosis (AS) is a common pathological basis of various cardiovascular and cerebrovascular diseases. Plaque formation is initiated and triggered by vascular smooth musclecells (VSMCs) migration in vascular wall, which gradually aggravates atherosclerosis progression. Absent in melanoma 2 (AIM2), a member of HIN-200 family, plays an important role in activating inflammasome. However, the role of AIM2 in atherosclerotic plaque progression outside of the inflammasome has not yet been reported...
February 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29445600/chronic-type-b-residual-after-type-a-what-i-would-do
#4
Martin Czerny, Maximilian Kreibich, Julia Morlock, Stoyan Kondov, Johannes Scheumann, Holger Schröfel, Fabian A Kari, Tim Berger, Matthias Siepe, Friedhelm Beyersdorf, Bartosz Rylski
" The major goal of surgery for acute type A aortic dissection is to have an alive patient. " This motto still remains the most important directive. However, also depending onto the extent of the underlying pathology and consecutively depending onto the extent of primary surgery, there is and will be need for additional classical surgical or interventional treatment sooner or later during follow-up in a substantial number of patients having had surgery for acute type A aortic dissection. This article shall guide the interested reader through the underlying mechanisms as well as treatment options in patients with chronic type B "residual" after type A repair and shall finally suggest preventive strategies to reduce the occurrence of this pathology to a minimum...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29443547/modeling-heart-failure-risk-in-diabetes-and-kidney-disease-limitations-and-potential-applications-of-transverse-aortic-constriction-in-high-fat-fed-mice
#5
Wei Sheng Tan, Thomas P Mullins, Melanie Flint, Sarah L Walton, Helle Bielefeldt-Ohmann, David A Carter, Meera R Gandhi, Hayley R McDonald, Joan Li, Karen M Moritz, Melissa E Reichelt, Linda A Gallo
There is an increased incidence of heart failure in individuals with diabetes mellitus (DM). The co-existence of kidney disease in DM exacerbates the cardiovascular prognosis. Researchers have attempted to combine the critical features of heart failure, using transverse aortic constriction, with DM in mice but variable findings have been reported. Furthermore, kidney outcomes have not been assessed in this setting thus its utility as a model of heart failure in DM and kidney disease is unknown. We generated a mouse model of obesity, hyperglycemia and mild kidney pathology by feeding male C57BL/6J mice a high fat diet (HFD)...
February 14, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29439675/screening-key-genes-for-abdominal-aortic-aneurysm-based-on-gene-expression-omnibus-dataset
#6
Li Wan, Jingyong Huang, Haizhen Ni, Guanfeng Yu
BACKGROUND: Abdominal aortic aneurysm (AAA) is a common cardiovascular system disease with high mortality. The aim of this study was to identify potential genes for diagnosis and therapy in AAA. METHODS: We searched and downloaded mRNA expression data from the Gene Expression Omnibus (GEO) database to identify differentially expressed genes (DEGs) from AAA and normal individuals. Then, Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis, transcriptional factors (TFs) network and protein-protein interaction (PPI) network were used to explore the function of genes...
February 13, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29438214/ncrnas-in-cavd-a-review-of-recent-studies
#7
Wen-Juan Ni, Dong-Hong Ma, Xiao-Min Leng
Calcific aortic valve disease (CAVD) is the most common heart valve disorder in human populations. Nevertheless, there are presently no effective means for its prevention and treatment. It is therefore critical to comprehensively define key mechanisms of the disease. A major focus of cardiovascular research has been characterization of how regulation of gene expression maintains healthy physiologic status of the component tissues of the system and how derangements of gene regulation may become pathological...
February 8, 2018: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29436118/cortistatin-inhibits-arterial-calcification-in-rats-via-gsk3%C3%AE-%C3%AE-catenin-and-pkc-signaling-but-not-jnk-signaling
#8
Yue Liu, Fang Lin, Yu Fu, Wenjia Chen, Wenxiu Liu, Jinyu Chi, Xiaohui Zhang, Xinhua Yin
AIM: Cortistatin (CST) is a newly discovered endogenous active peptide that exerts protective effects on the cardiovascular system. However, the relationship between CST and aortic calcification and the underlying mechanism remain obscure. Therefore, we investigated effects of CST on aortic calcification and its signaling pathways. METHODS: Calcium content and alkaline phosphatase (ALP) activity were measured using the o-cresolphthalein colorimetric method and ALP assay kit, respectively...
February 13, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29434588/gata3-hdac6-and-bcl6-regulate-foxp3-treg-plasticity-and-determine-treg-conversion-into-either-novel-antigen-presenting-cell-like-treg-or-th1-treg
#9
Keman Xu, William Y Yang, Gayani Kanchana Nanayakkara, Ying Shao, Fan Yang, Wenhui Hu, Eric T Choi, Hong Wang, Xiaofeng Yang
We conducted an experimental database analysis to determine the expression of 61 CD4+ Th subset regulators in human and murine tissues, cells, and in T-regulatory cells (Treg) in physiological and pathological conditions. We made the following significant findings: (1) adipose tissues of diabetic patients with insulin resistance upregulated various Th effector subset regulators; (2) in skin biopsy from patients with psoriasis, and in blood cells from patients with lupus, effector Th subset regulators were more upregulated than downregulated; (3) in rosiglitazone induced failing hearts in ApoE-deficient (KO) mice, various Th subset regulators were upregulated rather than downregulated; (4) aortic endothelial cells activated by proatherogenic stimuli secrete several Th subset-promoting cytokines; (5) in Treg from follicular Th (Tfh)-transcription factor (TF) Bcl6 KO mice, various Th subset regulators were upregulated; whereas in Treg from Th2-TF GATA3 KO mice and HDAC6 KO mice, various Th subset regulators were downregulated, suggesting that Bcl6 inhibits, GATA3 and HDAC6 promote, Treg plasticity; and (6) GATA3 KO, and Bcl6 KO Treg upregulated MHC II molecules and T cell co-stimulation receptors, suggesting that GATA3 and BCL6 inhibit Treg from becoming novel APC-Treg...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29433109/pathogenesis-of-aortic-wall-complications-in-marfan-syndrome
#10
Nimrat Grewal, Adriana C Gittenberger-de Groot
BACKGROUND: Patients with Marfan (MFS) syndrome and patients with a bicuspid aortic valve (BAV) are more prone to develop aortic dilation and dissection compared to persons with a tricuspid aortic valve (TAV). To elucidate potential common as well as distinct pathways of clinical relevance, we compared the histopathological substrates of aortic pathology. PATIENT AND METHODS: Ascending aortic wall specimen were divided in five groups: BAV (n=36) and TAV (n=23) without and with dilation and non-dilated MFS (n=8)...
February 2, 2018: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/29428538/carotid-access-for-endovascular-repair-of-aortic-pathology-a-systematic-review
#11
Thomas W Stonier, Kirtan Patel, Vamsee Bhrugubanda, Andrew Mtl Choong
BACKGROUND: Endovascular repair is now preferred to open access for the management of aortic diseases. This is typically performed via the femoral artery, however not all patients are eligible for this. This systematic review summaries the current evidence for utilising the carotid artery as an alternative access route. METHODS: A systematic review was conducted as per the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines using four electronic databases...
February 8, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29428455/ophthalmic-findings-of-rosai-dorfman-disease
#12
Michael B Choi, Diva R Salomão, Wendy M Smith, Jose S Pulido, James A Garrity
PURPOSE: To describe the ophthalmic, pathologic, and BRAF V600E mutation status of Rosai-Dorfman Disease (RDD). DESIGN: Retrospective case series. METHODS: A retrospective review of all cases of RDD seen at Mayo Clinic from 1992 to 2016 identified patients with ophthalmic manifestations (n=8). Immunostain for BRAF and molecular studies for BRAFV600E mutation were performed on cases with tissue available. RESULTS: Of 76 patients with RDD, 15 had eye exams and, of those, 8 had ophthalmic manifestations (5 females and 3 males)...
February 8, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29427619/the-association-of-aortic-valve-pathology-with-renal-resistive-index-as-a-kidney-injury-biomarker
#13
Benjamin Y Andrew, Anne D Cherry, Jennifer N Hauck, Alina Nicoara, Cory D Maxwell, Ryan M Konoske, Annemarie Thompson, Lakshmi D Kartha, Madhav Swaminathan, Mark Stafford-Smith
BACKGROUND: Acute kidney injury (AKI) is a common serious complication following cardiac surgery. Doppler-determined renal resistive index (RRI) is a promising early AKI biomarker in this population. However, the relationship between aortic valve pathology (insufficiency and/or stenosis) and RRI is unknown. This study aimed to investigate RRI variability related to aortic valve pathology. METHODS: In a retrospective review of cardiac surgery patients, RRI and aortic valve pathology were assessed prior to cardiopulmonary bypass using transesophageal echocardiography...
February 7, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29427472/impact-of-serum-ca19-9-level-on-prognosis-and-prediction-of-lymph-node-metastasis-in-patients-with-intrahepatic-cholangiocarcinoma
#14
Toru Yamada, Yoshitsugu Nakanishi, Keisuke Okamura, Takahiro Tsuchikawa, Toru Nakamura, Takehiro Noji, Toshimichi Asano, Kimitaka Tanaka, Yo Kurashima, Yuma Ebihara, Soichi Murakami, Toshiaki Shichinohe, Tomoko Mitsuhashi, Satoshi Hirano
BACKGROUND AND AIM: Lymph node metastasis is an important prognostic factor for intrahepatic cholangiocarcinoma (ICC), but accurate preoperative diagnosis is difficult. The aim of this study was to measure the concentration of serum carbohydrate antigen 19-9 (s-CA19-9) as a preoperative predictor of lymph node metastasis. METHODS: In our department, curative-intent hepatectomy for ICC has been performed only once the absence of metastases in para-aortic lymph nodes (PALN) has been confirmed from intraoperative frozen-section pathological examinations...
February 10, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29424186/spinal-cord-injury-in-endovascular-thoracoabdominal-aortic-aneurysm-repair-prevalence-risk-factors-and-preventive-strategies
#15
Vítor Miranda, Joel Sousa, Armando Mansilha
Thoracoabdominal aortic aneurysms are among the most challenging pathologic conditions vascular surgeons have to face. Endovascular treatment brought the prospect of being able to treat these complex aneurysms with less invasiveness and recent outcomes already challenge those of open repair. Plus, this technique offers a therapeutic option for patients who had none, due to significant comorbidities limiting open repair. Spinal cord injury is a major complication after complex aneurysm repair that dramatically affects patient's quality of life, even if technical success - aneurysm exclusion from circulation - has been achieved...
February 8, 2018: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/29416002/ezh2-inhibits-autophagic-cell-death-of-aortic-vascular-smooth-muscle-cells-to-affect-aortic-dissection
#16
Rui Li, Xin Yi, Xiang Wei, Bo Huo, Xian Guo, Cai Cheng, Ze-Min Fang, Jing Wang, Xin Feng, Ping Zheng, Yun-Shu Su, Jackson Ferdinand Masau, Xue-Hai Zhu, Ding-Sheng Jiang
Enhancer of zeste homolog 2 (EZH2), a methyltransferase that di- and tri-methylates lysine-27 of histone H3, largely functions as a transcriptional repressor, and plays a critical role in various kinds of cancers. Here we report a novel function of EZH2 in regulating autophagic cell death (ACD) of vascular smooth muscle cells (VSMCs) that affect aortic dissection (AD). Inhibition of EZH2 activity by UNC1999 or knockdown EZH2 resulted in VSMC loss, while overexpression of EZH2 facilitated VSMC growth, and these effects of EZH2 on VSMCs were independent of proliferation and apoptosis...
February 7, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29415911/inflammatory-mechanisms-of-cardiovascular-remodeling
#17
Toshihisa Anzai
Inflammation and fibrosis play an important role in the development and progression of cardiovascular diseases. Acute coronary syndrome (ACS) is caused by rupture of inflamed atherosclerotic plaque and subsequent atherothrombosis. Recent studies have shown that inflammatory markers such as C-reactive protein (CRP) can predict ACS development and have demonstrated the effectiveness of new therapeutic approaches targeting inflammation. Studies have also shown that an enhanced inflammatory response after myocardial infarction (MI) is associated with cardiac rupture, ventricular aneurysm formation, and exacerbation of left ventricular (LV) remodeling...
February 7, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29415372/one-stage-replacement-of-the-aorta-from-arch-to-thoracoabdominal-region
#18
Takashi Matsueda, Yuki Ikeno, Koki Yokawa, Yojiro Koda, Soichiro Henmi, Takeshi Inoue, Hiroshi Tanaka, Yutaka Okita
OBJECTIVES: We present our experience with one-stage replacement of thoracic aneurysm from the ascending aorta to the thoracoabdominal aorta. PATIENTS AND METHODS: Fourteen patients (10 male and 4 female; mean age 53.6 ± 12.4 years) with extended thoracic aortic aneurysms underwent graft replacement. The pathology of the diseased aorta was chronic aortic dissection in 13 patients and intraoperative retrograde aortic dissection in 1 patient. Five patients had Marfan syndrome...
February 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29414430/surgical-pathology-of-subaortic-septal-myectomy-histology-skips-over-clinical-diagnosis
#19
João Abecasis, Rosa Gouveia, Mariana Castro, Maria João Andrade, Regina Ribeiras, Sância Ramos, Miguel Abecasis, Nuno Cardim, Victor Gil
BACKGROUND: Subaortic septal myectomy is usually performed to mitigate obstruction in patients with the obstructive form of hypertrophic cardiomyopathy (HCM) or in those with congenital subaortic stenosis. Moreover, it is combined with aortic valve replacement in patients with severe aortic valve stenosis (SAS) and asymmetrical septal hypertrophy causing concomitant left ventricular outflow tract obstruction. When both conditions coexist, it is conceptually difficult to identify a cardiomyopathy beyond an adaptive myocardial hypertrophy, strictly related to pressure overload...
January 3, 2018: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/29410467/data-driven-modeling-of-hemodynamics-and-its-role-on-thrombus-size-and-shape-in-aortic-dissections
#20
Alireza Yazdani, He Li, Matthew R Bersi, Paolo Di Achille, Joseph Insley, Jay D Humphrey, George Em Karniadakis
Aortic dissection is a pathology that manifests due to microstructural defects in the aortic wall. Blood enters the damaged wall through an intimal tear, thereby creating a so-called false lumen and exposing the blood to thrombogenic intramural constituents such as collagen. The natural history of this acute vascular injury thus depends, in part, on thrombus formation, maturation, and possible healing within the false lumen. A key question is: Why do some false lumens thrombose completely while others thrombose partially or little at all? An ability to predict the location and extent of thrombus in subjects with dissection could contribute significantly to clinical decision-making, including interventional design...
February 6, 2018: Scientific Reports
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