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Pulmonary circulation

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https://www.readbyqxmd.com/read/28106253/massive-plasmablast-response-elicited-in-the-acute-phase-of-hantavirus-pulmonary-syndrome
#1
Marina García, Ayelén Iglesias, Verónica I Landoni, Carla Bellomo, Agostina Bruno, María Teresa Córdoba, Luciana Balboa, Gabriela C Fernández, María Del Carmen Sasiain, Valeria P Martínez, Pablo Schierloh
Beside its key diagnostic value, the humoral immune response is thought to play a protective role in Hantavirus Pulmonary Syndrome (HPS). However, little is known about the cell source of these antibodies during ongoing human infection. Herein we characterized B cell subsets circulating in Andes virus-infected patients. A notable potent plasmablast (PB) response that increased 100-fold over the baseline levels was observed around one week after the onset of symptoms. These PB present a CD3(neg) CD19(low) CD20(neg) CD38(hi) CD27(hi) CD138(+/-) IgA(+/-) surface phenotype together with the presence of cytoplasmic functional immunoglobulins...
January 20, 2017: Immunology
https://www.readbyqxmd.com/read/28103932/biomarkers-of-extracellular-matrix-turnover-are-associated-with-emphysema-and-eosinophilic-bronchitis-in-copd
#2
Asger Reinstrup Bihlet, Morten Asser Karsdal, Jannie Marie Bülow Sand, Diana Julie Leeming, Mustimbo Roberts, Wendy White, Russell Bowler
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is characterized by airflow obstruction and loss of lung tissue mainly consisting of extracellular matrix (ECM). Three of the main ECM components are type I collagen, the main constituent in the interstitial matrix, type VI collagen, and elastin, the signature protein of the lungs. During pathological remodeling driven by inflammatory cells and proteases, fragments of these proteins are released into the bloodstream, where they may serve as biomarkers for disease phenotypes...
January 19, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28102856/the-impact-of-integrated-evaluation-of-hemodynamics-using-targeted-neonatal-echocardiography-with-indices-of-tissue-oxygenation-a-new-approach
#3
Y N Elsayed, R Amer, M M Seshia
OBJECTIVE: To study the impact of integrated evaluation of hemodynamics (IEH) using targeted neonatal echocardiography, together with regional tissue oxygenation, fractional oxygen extraction using near-infrared spectroscopy on the management of infants with compromised hemodynamics. STUDY DESIGN: Retrospective cohort comparison of two groups of infants with compromised hemodynamics. EPOCH 1: did not undergo IEH (January 2012 to March 2014); EPOCH 2: underwent IEH (April 2014 to December 2015)...
January 19, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28100430/three-decades-later-the-fate-of-the-population-of-patients-who-underwent-the-atriopulmonary-fontan-procedure
#4
Chin Leng Poh, Diana Zannino, Robert G Weintraub, David S Winlaw, Leeanne E Grigg, Rachael Cordina, Tim Hornung, Andrew Bullock, Robert N Justo, Thomas L Gentles, Charlotte Verrall, Karin du Plessis, David S Celermajer, Yves d'Udekem
OBJECTIVE: To review our experience of patients with an atrio-pulmonary Fontan circulation to determine their long-term outcomes. METHODS AND RESULTS: A retrospective analysis of long-term follow-up data using the Australia and New Zealand Fontan Registry was performed. There were 215 patients surviving hospital discharge after an atrio-pulmonary Fontan completion. A total of 163 patients were alive at latest follow-up, with 52 deaths. Twelve patients had required heart transplantation and 95 had Fontan failure (death, transplantation, Fontan takedown, Fontan conversion, severe systemic ventricular dysfunction or NYHA≥3)...
January 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28099680/novel-putative-pharmacologic-therapies-to-protect-the-right-ventricle-in-pulmonary-hypertension-a-review-of-current-literature
#5
REVIEW
Gerald J Maarman, Rainer Schulz, Karen Sliwa, Ralph Schermuly, Sandrine Lecour
Pulmonary hypertension (PH) is defined by elevated mean pulmonary artery pressure following the pathologic remodelling of small pulmonary arteries. An increase in right ventricular (RV) afterload results in RV hypertrophy and RV failure. The pathophysiology of PH, and RV remodelling in particular, are not well understood, thus explaining, at least in part, why current PH therapies have a limited effect. Existing therapies mostly target the pulmonary circulation. Because the remodelled RV fails to support normal cardiac function, patients eventually succumb from RV failure...
January 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28099079/lymphangioleiomyomatosis-a-monogenic-model-of-malignancy
#6
Vera P Krymskaya, Francis X McCormack
Lymphangioleiomyomatosis (LAM) is a rare, low-grade, metastasizing neoplasm that arises from an unknown source, spreads via the lymphatics, and targets the lungs. All pulmonary structures become infiltrated with benign-appearing spindle and epithelioid cells (LAM cells) that express smooth-muscle and melanocyte-lineage markers, harbor mTOR-activating mutations in tuberous sclerosis complex (TSC) genes, and recruit abundant stromal cells. Elaboration of lymphangiogenic growth factors and matrix remodeling enzymes by LAM cells enables their access to lymphatic channels and likely drives the cystic lung remodeling that often culminates in respiratory failure...
January 14, 2017: Annual Review of Medicine
https://www.readbyqxmd.com/read/28097236/lung-vaso-occlusion-in-sickle-cell-disease-mediated-by-arteriolar-neutrophil-platelet-microemboli
#7
Margaret F Bennewitz, Maritza A Jimenez, Ravi Vats, Egemen Tutuncuoglu, Jude Jonassaint, Gregory J Kato, Mark T Gladwin, Prithu Sundd
In patients with sickle cell disease (SCD), the polymerization of intraerythrocytic hemoglobin S promotes downstream vaso-occlusive events in the microvasculature. While vaso-occlusion is known to occur in the lung, often in the context of systemic vaso-occlusive crisis and the acute chest syndrome, the pathophysiological mechanisms that incite lung injury are unknown. We used intravital microscopy of the lung in transgenic humanized SCD mice to monitor acute vaso-occlusive events following an acute dose of systemic lipopolysaccharide sufficient to trigger events in SCD but not control mice...
January 12, 2017: JCI Insight
https://www.readbyqxmd.com/read/28094851/blood-transfusion-for-preventing-primary-and-secondary-stroke-in-people-with-sickle-cell-disease
#8
REVIEW
Lise J Estcourt, Patricia M Fortin, Sally Hopewell, Marialena Trivella, Winfred C Wang
BACKGROUND: Sickle cell disease is one of the commonest severe monogenic disorders in the world, due to the inheritance of two abnormal haemoglobin (beta globin) genes. Sickle cell disease can cause severe pain, significant end-organ damage, pulmonary complications, and premature death. Stroke affects around 10% of children with sickle cell anaemia (HbSS). Chronic blood transfusions may reduce the risk of vaso-occlusion and stroke by diluting the proportion of sickled cells in the circulation...
January 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28093463/bidirectional-cavopulmonary-anastomosis-with-additional-pulmonary-blood-flow-good-or-bad-pre-fontan-strategy
#9
Nataliya R Nichay, Yuriy N Gorbatykh, Igor A Kornilov, Ilya A Soynov, Sergey M Ivantsov, Artem V Gorbatykh, Dmitriy N Ponomarev, Alexander V Bogachev-Prokophiev, Alexander M Karaskov
OBJECTIVES: This study aimed to evaluate the influence of preserved additional pulmonary blood flow (APBF) on survival after bidirectional cavopulmonary shunt (BCPS) and completion of Fontan circulation. METHODS: From March 2003 and April 2015, 156 patients with a single ventricle underwent BCPS. After performing propensity score analysis (1:1) for the entire sample, 50 patients with APBF (APBF group) were matched with 50 patients without APBF (no-APBF group). RESULTS: Age (P = 0...
January 15, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28090291/macrophage-migration-inhibitory-factor-as-a-novel-biomarker-of-portopulmonary-hypertension
#10
Hilary M DuBrock, Josanna M Rodriguez-Lopez, Barbara L LeVarge, Michael P Curry, Paul A VanderLaan, Zsuzsanna K Zsengeller, Elizabeth Pernicone, Ioana R Preston, Paul B Yu, Ivana Nikolic, Dihua Xu, Ravi I Thadhani, Richard N Channick, S Ananth Karumanchi
Portopulmonary hypertension (POPH) is a poorly understood complication of liver disease associated with significant morbidity and mortality. We sought to identify novel biomarkers of POPH disease presence and severity. We performed a prospective, multicenter, case-control study involving patients with liver disease undergoing right heart catheterization. POPH cases were defined as a mean pulmonary arterial pressure (mPAP) ≥25 mmHg and pulmonary vascular resistance (PVR) >240 dynes˙s˙cm(-5). Plasma samples were collected from the systemic and pulmonary circulation, and antibody microarray was used to identify biomarkers...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090286/novel-methods-in-pulmonary-hypertension-phenotyping-in-the-age-of-precision-medicine-2015-grover-conference-series
#11
REVIEW
Jarrod W Barnes, Adriano R Tonelli, Gustavo A Heresi, Jennie E Newman, Noël E Mellor, David E Grove, Raed A Dweik
Among pulmonary vascular diseases, pulmonary hypertension (PH) is the best studied and has been the focus of our work. The current classification of PH is based on a relatively simple combination of patient characteristics and hemodynamics. This leads to inherent limitations, including the inability to customize treatment and the lack of clarity from a more granular identification based on individual patient phenotypes. Accurate phenotyping of PH can be used in the clinic to select therapies and determine prognosis and in research to increase the homogeneity of study cohorts...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090285/pulmonary-vascular-and-ventricular-dysfunction-in-the-susceptible-patient-2015-grover-conference-series
#12
REVIEW
Bradley A Maron, Roberto F Machado, Larissa Shimoda
Pulmonary blood vessel structure and tone are maintained by a complex interplay between endogenous vasoactive factors and oxygen-sensing intermediaries. Under physiological conditions, these signaling networks function as an adaptive interface between the pulmonary circulation and environmental or acquired perturbations to preserve oxygenation and maintain systemic delivery of oxygen-rich hemoglobin. Chronic exposure to hypoxia, however, triggers a range of pathogenetic mechanisms that include hypoxia-inducible factor 1α (HIF-1α)-dependent upregulation of the vasoconstrictor peptide endothelin 1 in pulmonary endothelial cells...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28088601/mid-term-outcomes-in-patients-with-congenitally-corrected-transposition-of-the-great-arteries-a-single-center-experience
#13
Luis E De León, Carlos M Mery, Raymond A Verm, Daniel Trujillo-Díaz, Ankita Patro, Francisco A Guzmán-Pruneda, Iki Adachi, Jeffrey S Heinle, Lauren C Kane, E Dean McKenzie, Charles D Fraser
INTRO: The optimal management of patients with congenitally-corrected transposition of the great arteries (ccTGA) is unclear. The goal of this study was to compare the outcomes in patients with ccTGA undergoing different management strategies. METHODS: Patients with ccTGA believed suitable for biventricular circulation treated in 1995-2016 were included. The cohort was divided into four groups: systemic right ventricle (RV) (patients without surgical intervention or with a classic repair), anatomic repair, Fontan palliation, and patients only receiving a pulmonary artery band (PAB) or a shunt...
January 11, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28088475/role-of-some-vasoactive-mediators-in-scorpion-envenomed-children-possible-relation-to-envenoming-outcome
#14
Sahar E M El-DeeK, Ayat A Sayed, Ahmed Y Nassar, Zeynab M Mohey-Eldeen, Hussein M Eldeeb, Abdel-Raheim M A Meki
Scorpion envenomation causes an autonomic storm resulting in changes in the vasoactive mediators' levels which lead to myocardial damage, cardiovascular disturbances, peripheral circulatory failure, pulmonary edema, multi-system-organ-failure and death. The study aimed to determine the circulating levels of adrenaline, noradrenaline, angiotensin converting enzyme (ACE), Angiotensin II (Ang II), kallikrein enzyme, nitric oxide (NO), aldosterone, and electrolytes Na(+), K(+) and Ca(+2) in scorpion envenomed children and to evaluate the potential relation between these vasoactive mediators, the severity of scorpion envenoming and the clinical outcome of envenomed children...
January 11, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28087179/value-of-serum-n-terminal-b-type-natriuretic-peptide-in-asymptomatic-structural-heart-disease-in-taiwanese-population-comparisons-with-current-esc-guidelines
#15
Ta-Chuan Hung, Kuang-Te Wang, Chun-Ho Yun, Jen-Yuan Kuo, Charles Jia-Yin Hou, Chia-Yuan Liu, Tung-Hsin Wu, Hiram G Bezerra, Hsiao-Yang Cheng, Chung-Lieh Hung, Hung-I Yeh
BACKGROUND: The relationship between N-terminal pro-brain natriuretic peptide (NT-proBNP) and cardiac structural or functional anomalies in pre-clinical, asymptomatic Asian populations has not been well identified. METHODS: From October 2005 to March 2008, we enrolled consecutive asymptomatic adults with preserved global left ventricular (LV) function (ejection fraction>50%) who underwent annual cardiovascular health survey. Circulating NT-proBNP was used to identify echo-defined cardiac structural/functional anomalies and compared to current recommended cut-off from the European Society of Heart Failure...
December 29, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28077176/main-pulmonary-artery-cross-section-ratio-is-low-in-fetuses-with-tetralogy-of-fallot-and-ductus-arteriosus-dependent-pulmonary-circulation
#16
Hironori Ebishima, Kenichi Kurosaki, Jun Yoshimatsu, Isao Shiraishi
OBJECTIVES: This study aimed to determine fetal echocardiographic features of tetralogy of Fallot in association with postnatal outcomes. METHODS: The Z-scores of the main and bilateral pulmonary arteries and the aorta were measured, and the following variables were calculated in 13 fetuses with tetralogy of Fallot: pulmonary artery-to-aorta ratio and main pulmonary artery cross-section ratio - the main pulmonary artery diameter squared divided by the sum of the diameter squared of the left and right pulmonary arteries...
January 12, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28070902/a-modified-lvad-technique-to-augment-caval-and-pulmonary-arterial-blood-flow-in-the-failing-fontan-circulation
#17
Michael F Swartz, Louis DiVincenti, Karen Smith, Robin Westcott, Kevin Belmont, William Harris, Francisco Gensini, George M Alfieris
BACKGROUND: There are minimal circulatory support options for patients with a failing Fontan. The Heartmate II (HMII) left ventricular assist device (Thoratec, Bedford, MA) in its packaged state cannot augment caval/pulmonary arterial blood flow. AIM: We hypothesized that a modified HMII pump could augment caval and pulmonary arterial blood flow. METHODS: A bifurcated ringed Gore-Tex graft (W. L. Gore & Associates, Flagstaff, AZ) was sewn to the HMII inflow, and the outflow graft transected and tapered from 16 mm to 8 mm in diameter...
January 9, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28070238/hematological-disorders-and-pulmonary-hypertension
#18
REVIEW
Rajamma Mathew, Jing Huang, Joseph M Wu, John T Fallon, Michael H Gewitz
Pulmonary hypertension (PH), a serious disorder with a high morbidity and mortality rate, is known to occur in a number of unrelated systemic diseases. Several hematological disorders such as sickle cell disease, thalassemia and myeloproliferative diseases develop PH which worsens the prognosis. Associated oxidant injury and vascular inflammation cause endothelial damage and dysfunction. Pulmonary vascular endothelial damage/dysfunction is an early event in PH resulting in the loss of vascular reactivity, activation of proliferative and antiapoptotic pathways leading to vascular remodeling, elevated pulmonary artery pressure, right ventricular hypertrophy and premature death...
December 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/28068653/exosomes-derived-from-human-pulmonary-artery-endothelial-cells-shift-the-balance-between-proliferation-and-apoptosis-of-smooth-muscle-cells
#19
Lin Zhao, Hui Luo, Xiaohui Li, Tangzhiming Li, Jingni He, Qiangqiang Qi, Yuwei Liu, Zaixin Yu
BACKGROUND: The overproliferation of pulmonary vascular cells is noted in pulmonary hypertension. The role of exosomes from pulmonary artery endothelial cells (PAEC) in the proliferation and apoptosis of pulmonary artery smooth muscle cells (PASMC) remains unclear. METHODS: Exosomes were isolated and purified from the culture medium of PAEC using a commercial kit. Lipopolysaccharide (LPS), hypoxia, and hydrogen peroxide were utilized to induce PAEC injury. Coculture of PAEC and PASMC was conducted using Transwell plates, and GW4869 was applied to inhibit exosome release...
January 10, 2017: Cardiology
https://www.readbyqxmd.com/read/28062589/discovery-of-the-pulmonary-circulation
#20
Arman Zargaran, Hamed Arezaei
No abstract text is available yet for this article.
December 14, 2016: European Heart Journal
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