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https://www.readbyqxmd.com/read/29097367/sex-chromosome-complement-defines-diffuse-versus-focal-angiotensin-ii-induced-aortic-pathology
#1
Yasir Alsiraj, Sean E Thatcher, Eric Blalock, Bradley Fleenor, Alan Daugherty, Lisa A Cassis
OBJECTIVE: Aortic pathologies exhibit sexual dimorphism, with aneurysms in both the thoracic and abdominal aorta (ie, abdominal aortic aneurysm [AAA]) exhibiting higher male prevalence. Women have lower prevalence of aneurysms, but when they occur, aneurysms progress rapidly. To define mechanisms for these sex differences, we determined the role of sex chromosome complement and testosterone on the location and progression of angiotensin II (AngII)-induced aortic pathologies. APPROACH AND RESULTS: We used transgenic male mice expressing Sry on an autosome to create Ldlr (low-density lipoprotein receptor)-deficient male mice with an XY or XX sex chromosome complement...
November 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29066081/acc-aats-aha-ase-asnc-hrs-scai-scct-scmr-sts-2017-appropriate-use-criteria-for-multimodality-imaging-in-valvular%C3%A2-heart-disease-a-report-of-the-american-college-of-cardiology-appropriate-use-criteria-task-force-american-association-for-thoracic-surgery-american
#2
John U Doherty, Smadar Kort, Roxana Mehran, Paul Schoenhagen, Prem Soman, Greg J Dehmer, John U Doherty, Paul Schoenhagen, Zahid Amin, Thomas M Bashore, Andrew Boyle, Dennis A Calnon, Blase Carabello, Manuel D Cerqueira, John Conte, Milind Desai, Daniel Edmundowicz, Victor A Ferrari, Brian Ghoshhajra, Praveen Mehrotra, Saman Nazarian, T Brett Reece, Balaji Tamarappoo, Wendy S Tzou, John B Wong, John U Doherty, Gregory J Dehmer, Steven R Bailey, Nicole M Bhave, Alan S Brown, Stacie L Daugherty, Larry S Dean, Milind Y Desai, Claire S Duvernoy, Linda D Gillam, Robert C Hendel, Christopher M Kramer, Bruce D Lindsay, Warren J Manning, Praveen Mehrotra, Manesh R Patel, Ritu Sachdeva, L Samuel Wann, David E Winchester, Michael J Wolk, Joseph M Allen
This document is 1 of 2 companion appropriate use criteria (AUC) documents developed by the American College of Cardiology, American Association for Thoracic Surgery, American Heart Association, American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society for Cardiovascular Angiography and Interventions, Society of Cardiovascular Computed Tomography, Society for Cardiovascular Magnetic Resonance, and Society of Thoracic Surgeons. This document addresses the evaluation and use of multimodality imaging in the diagnosis and management of valvular heart disease, whereas the second, companion document addresses this topic with regard to structural heart disease...
October 20, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29047330/deletion-of-the-nr4a-nuclear-receptor-nor1-in-hematopoietic-stem-cells-reduces-inflammation-but-not-abdominal-aortic-aneurysm-formation
#3
Hua Qing, Karrie L Jones, Elizabeth B Heywood, Hong Lu, Alan Daugherty, Dennis Bruemmer
BACKGROUND: The NR4A3 orphan nuclear hormone receptor, NOR1, functions as a constitutively active transcription factor to regulate inflammation, proliferation, and cell survival during pathological vascular remodeling. Inflammatory processes represent key mechanisms leading to abdominal aortic aneurysm (AAA) formation. However, a role of NOR1 in AAA formation has not been investigated previously. METHODS: Inflammatory gene expression was analyzed in bone marrow-derived macrophages isolated from NOR1-deficient mice...
October 18, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28971841/role-of-myeloperoxidase-in-abdominal-aortic-aneurysm-formation-mitigation-by-taurine
#4
Ha Won Kim, Andra L Blomkalns, Mourad Ogbi, Manesh Thomas, Daniel Gavrila, Bonnie S Neltner, Lisa A Cassis, Robert W Thompson, Robert M Weiss, Paul D Lindower, Victor M Blanco, Michael L McCormick, Alan Daugherty, Xiaoming Fu, Stanley L Hazen, Brian K Stansfield, Yuqing Huo, David J Fulton, Tapan Chatterjee, Neal L Weintraub
Oxidative stress plays a fundamental role in abdominal aortic aneurysm (AAA) formation. Activated polymorphonuclear leukocytes (or neutrophils) are associated with AAA and express myeloperoxidase (MPO), which promotes inflammation, matrix degradation, and other pathological features of AAA, including enhanced oxidative stress through generation of reactive oxygen species. Both plasma and aortic MPO levels are elevated in patients with AAA, but the role of MPO in AAA pathogenesis has, heretofore, never been investigated...
December 1, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28802695/scarce-resource-allocation-during-disasters-a-mixed-method-community-engagement-study
#5
E Lee Daugherty Biddison, Howard S Gwon, Monica Schoch-Spana, Alan C Regenberg, Chrissie Juliano, Ruth R Faden, Eric S Toner
BACKGROUND: During a catastrophe, health-care providers may face difficult questions regarding who will receive limited life-saving resources. The ethical principles that should guide decision-making have been considered by expert panels but have not been well explored with the public or front-line clinicians. The objective of this study was to characterize the public's values regarding how scarce mechanical ventilators should be allocated during an influenza pandemic, with the ultimate goal of informing a statewide scare resource allocation framework...
August 9, 2017: Chest
https://www.readbyqxmd.com/read/28729366/recommendation-on-design-execution-and-reporting-of-animal-atherosclerosis-studies-a-scientific-statement-from-the-american-heart-association
#6
REVIEW
Alan Daugherty, Alan R Tall, Mat J A P Daemen, Erling Falk, Edward A Fisher, Guillermo García-Cardeña, Aldons J Lusis, A Phillip Owens, Michael E Rosenfeld, Renu Virmani
Animal studies are a foundation for defining mechanisms of atherosclerosis and potential targets of drugs to prevent lesion development or reverse the disease. In the current literature, it is common to see contradictions of outcomes in animal studies from different research groups, leading to the paucity of extrapolations of experimental findings into understanding the human disease. The purpose of this statement is to provide guidelines for development and execution of experimental design and interpretation in animal studies...
September 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28729353/recommendation-on-design-execution-and-reporting-of-animal-atherosclerosis-studies-a-scientific-statement-from-the-american-heart-association
#7
REVIEW
Alan Daugherty, Alan R Tall, Mat J A P Daemen, Erling Falk, Edward A Fisher, Guillermo García-Cardeña, Aldons J Lusis, A Phillip Owens, Michael E Rosenfeld, Renu Virmani
Animal studies are a foundation for defining mechanisms of atherosclerosis and potential targets of drugs to prevent lesion development or reverse the disease. In the current literature, it is common to see contradictions of outcomes in animal studies from different research groups, leading to the paucity of extrapolations of experimental findings into understanding the human disease. The purpose of this statement is to provide guidelines for development and execution of experimental design and interpretation in animal studies...
September 1, 2017: Circulation Research
https://www.readbyqxmd.com/read/28663257/smooth-muscle-cells-derived-from-second-heart-field-and-cardiac-neural-crest-reside-in-spatially-distinct-domains-in-the-media-of-the-ascending-aorta-brief-report
#8
Hisashi Sawada, Debra L Rateri, Jessica J Moorleghen, Mark W Majesky, Alan Daugherty
OBJECTIVE: Smooth muscle cells (SMCs) of the proximal thoracic aorta are embryonically derived from the second heart field (SHF) and cardiac neural crest (CNC). However, distributions of these embryonic origins are not fully defined. The regional distribution of SMCs of different origins is speculated to cause region-specific aortopathies. Therefore, the aim of this study was to determine the distribution of SMCs of SHF and CNC origins in the proximal thoracic aorta. APPROACH AND RESULTS: Mice with repressed LacZ in the ROSA26 locus were bred to those expressing Cre controlled by either the Wnt1 or Mef2c (myocyte-specific enhancer factor 2c) promoter to trace CNC- and SHF-derived SMCs, respectively...
September 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28539494/aortic-aneurysms
#9
REVIEW
Hong Lu, Alan Daugherty
No abstract text is available yet for this article.
June 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28500592/a-color-segmentation-based-method-to-quantify-atherosclerotic-lesion-compositions-with-immunostaining
#10
Congqing Wu, Alan Daugherty, Hong Lu
There is an increasing recognition that atherosclerotic lesion composition, rather than size, is the determinant of acute events. Immunostaining is a commonly used method to characterize atherosclerotic lesion compositions. Here, we describe a color segmentation-based approach in HSI (hue, saturation, and intensity) color mode, which minimizes subjectivity and produces accurate and consistent quantifications of atherosclerotic lesion compositions.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28459768/macrophage-mediated-mechanisms-in-atherosclerosis-still-tangled
#11
Feiming Ye, Jian-An Wang, Alan Daugherty, Hong Lu
No abstract text is available yet for this article.
June 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28420827/relaxin-and-matrix-metalloproteinase-9-in-angiotensin-ii-induced-abdominal-aortic-aneurysms
#12
Deborah A Howatt, Maya Dajee, Xiaojie Xie, Jessica Moorleghen, Debra L Rateri, Anju Balakrishnan, Valdeci Da Cunha, Douglas G Johns, David E Gutstein, Alan Daugherty, Hong Lu
BACKGROUND: This study determined whether relaxin or matrix metalloproteinase (MMP)-9 influences angiotensin II (AngII)-induced abdominal aortic aneurysms (AAA).Methods and Results:Male C57BL/6 or apolipoprotein E(-/-)mice were infused with AngII with or without relaxin. Relaxin did not influence AngII-induced AAA in either mouse strain. Infusion of AngII reduced, but relaxin increased, MMP-9 mRNA in macrophages. We then determined the effects of MMP-9 deficiency on AAA in apolipoprotein E(-/-)mice...
April 18, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28270575/truncated-trkb-t1-mediated-astrocyte-dysfunction-contributes-to-impaired-motor-function-and-neuropathic-pain-after-spinal-cord-injury
#13
Jessica J Matyas, Cliona M O'Driscoll, Laina Yu, Marina Coll-Miro, Sean Daugherty, Cynthia L Renn, Alan I Faden, Susan G Dorsey, Junfang Wu
Following spinal cord injury (SCI), astrocytes demonstrate long-lasting reactive changes, which are associated with the persistence of neuropathic pain and motor dysfunction. We previously demonstrated that upregulation of trkB.T1, a truncated isoform of the brain-derived neurotrophic factor receptor (BDNF), contributes to gliosis after SCI, but little is known about the effects of trkB.T1 on the function of astrocytes. As trkB.T1 is the sole isoform of trkB receptors expressed on astrocytes, we examined the function of trkB...
April 5, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28153877/recipients-of-the-2017-early-career-investigator-awards
#14
Alan Daugherty
No abstract text is available yet for this article.
February 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28119286/transforming-growth-factor-%C3%AE-in-thoracic-aortic-aneurysms-good-bad-or-irrelevant
#15
EDITORIAL
Alan Daugherty, Zheying Chen, Hisashi Sawada, Debra L Rateri, Mary B Sheppard
No abstract text is available yet for this article.
January 24, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27818490/corrigendum-structure-and-functions-of-angiotensinogen
#16
Hong Lu, Lisa A Cassis, Craig W Vander Kooi, Alan Daugherty
No abstract text is available yet for this article.
November 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27815372/female-mice-with-an-xy-sex-chromosome-complement-develop-severe-angiotensin-ii-induced-abdominal-aortic-aneurysms
#17
Yasir Alsiraj, Sean E Thatcher, Richard Charnigo, Kuey Chen, Eric Blalock, Alan Daugherty, Lisa A Cassis
BACKGROUND: Abdominal aortic aneurysms (AAAs) are a deadly pathology with strong sexual dimorphism. Similar to humans, female mice exhibit far lower incidences of angiotensin II-induced AAAs than males. In addition to sex hormones, the X and Y sex chromosomes, and their unique complements of genes, may contribute to sexually dimorphic AAA pathology. Here, we defined the effect of female (XX) versus male (XY) sex chromosome complement on angiotensin II-induced AAA formation and rupture in phenotypically female mice...
January 24, 2017: Circulation
https://www.readbyqxmd.com/read/27618768/insights-into-ascending-aortic-aneurysm-pathogenesis-using-in-vivo-and-ex-vivo-imaging-systems-in-angiotensin-ii-infused-mice
#18
COMMENT
Mary B Sheppard, Alan Daugherty, Hong Lu
No abstract text is available yet for this article.
August 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27579551/calcification-in-atherosclerotic-lesions
#19
Hong Lu, Mary Sheppard, Alan Daugherty
No abstract text is available yet for this article.
October 2016: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/27470509/hypercholesterolemia-induced-by-a-pcsk9-gain-of-function-mutation-augments-angiotensin-ii-induced-abdominal-aortic-aneurysms-in-c57bl-6-mice-brief-report
#20
COMPARATIVE STUDY
Hong Lu, Deborah A Howatt, Anju Balakrishnan, Mark J Graham, Adam E Mullick, Alan Daugherty
OBJECTIVE: Gain-of-function mutations of PCSK9 (proprotein convertase subtilisin/kexin type 9) lead to hypercholesterolemia. This study was to determine whether infection of normocholesterolemic mice with an adeno-associated viral (AAV) vector expressing a gain-of-function mutation of mouse PCSK9 increased angiotensin II (AngII)-induced abdominal aortic aneurysms. APPROACH AND RESULTS: In an initial study, male C57BL/6 mice were injected intraperitoneally with either an empty vector or PCSK9 gain-of-function mutation (D377Y)...
September 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
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