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Microvascular function

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https://www.readbyqxmd.com/read/29161767/effects-of-different-endurance-exercise-modalities-on-migraine-days-and-cerebrovascular-health-in-episodic-migraineurs-a-randomized-controlled-trial
#1
Henner Hanssen, Alice Minghetti, Stefano Magon, Anja Rossmeissl, Maria Rasenack, Athina Papadopoulou, Christopher Klenk, Oliver Faude, Lukas Zahner, Till Sprenger, Lars Donath
BACKGROUND: Aerobic exercise training is a promising complementary treatment option in migraine and can reduce migraine days and improve retinal microvascular function. Our aim was to elucidate whether different aerobic exercise programs at high vs. moderate intensities distinctly affect migraine days as primary outcome and retinal vessel parameters as a secondary. METHODS: In this randomized controlled trial, migraine days were recorded by a validated migraine diary in 45 migraineurs of which 36 (female: 28; age: 36 (SD:10)/ BMI: 23...
November 21, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29160087/glyoxalase-1-modulation-in-obesity-and-diabetes
#2
Naila Rabbani, Paul J Thornalley
SIGNIFICANCE: Obesity and type 2 diabetes mellitus are increasing globally. There is also increasing associated complications, such as non-alcoholic fatty liver disease (NAFLD) and vascular complications of diabetes. There is currently no licensed treatment for NAFLD and no recent treatments for diabetic complications. New approaches are required, particularly addressing mechanism-based risk factors for health decline and disease progression. Recent advances: Dicarbonyl stress is the abnormal accumulation of reactive dicarbonyl metabolites such as methylglyoxal leading to cell and tissue dysfunction...
November 21, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29154281/gradual-cerebral-hypoperfusion-impairs-fear-conditioning-and-object-recognition-learning-and-memory-in-mice-potential-roles-of-neurodegeneration-and-cholinergic-dysfunction
#3
Jogender Mehla, Sean Lacoursiere, Emily Stuart, Robert J McDonald, Majid H Mohajerani
In the present study, male C57BL/6J mice were subjected to gradual cerebral hypoperfusion by implanting an ameroid constrictor (AC) on the left common carotid artery (CCA) and a stenosis on the right CCA. In the sham group, all surgical procedures were kept the same except no AC was implanted and stenosis was not performed. One month following the surgical procedures, fear conditioning and object recognition tests were conducted to evaluate learning and memory functions and motor functions were assessed using a balance beam test...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29153664/microcirculatory-blood-flow-derangements-during-severe-preeclampsia-and-hellp-syndrome
#4
Gustavo Adolfo Ospina-Tascón, Albaro José Nieto Calvache, Edgardo Quiñones, Humberto José Madriñan, Juan David Valencia, William Fernando Bermúdez, Javier Carvajal, María Fernanda Escobar, Daniel de Backer
OBJECTIVE: To evaluate the microcirculatory blood flow in severe preeclampsia and compare it with healthy pregnant and non-pregnant women controls, using a portable intravital-microscopy technique. METHODS: Using a side-stream dark field (SDF) device, we prospectively evaluated the sublingual microcirculatory blood flow before placental delivery in 40 women with severe preeclampsia (PE-group) complicated (n=8) or not (n=32) with HELLP syndrome, 40 healthy pregnant women (HP-group) matched by gestational and chronological age, and 20 healthy non-pregnant women (NP-group)...
October 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29147069/expression-profiling-of-long-noncoding-rna-splice-variants-in-human-microvascular-endothelial-cells-lipopolysaccharide-effects-in-vitro
#5
Imran H Chowdhury, Hema P Narra, Abha Sahni, Kamil Khanipov, Casey L C Schroeder, Jignesh Patel, Yuriy Fofanov, Sanjeev K Sahni
Endothelial cell interactions with lipopolysaccharide (LPS) involve both activating and repressing signals resulting in pronounced alterations in their transcriptome and proteome. Noncoding RNAs are now appreciated as posttranscriptional and translational regulators of cellular signaling and responses, but their expression status and roles during endothelial interactions with LPS are not well understood. We report on the expression profile of long noncoding (lnc) RNAs of human microvascular endothelial cells in response to LPS...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29141862/the-activation-of-human-dermal-microvascular-cells-by-poly-i-c-lipopolysaccharide-imiquimod-and-odn2395-is-mediated-by-the-fli1-foxo3a-pathway
#6
Lukasz Stawski, Grace Marden, Maria Trojanowska
Endothelial cell (EC) dysfunction has been associated with inflammatory and autoimmune diseases; however, the factors contributing to this dysfunction have not been fully explored. Because activation of TLRs has been implicated in autoimmune diseases, the goal of this study was to determine the effects of TLR ligands on EC function. Human dermal microvascular ECs (HDMECs) treated with TLR3 [Poly(I:C)], TLR4 (LPS), and TLR7 (imiquimod) agonists showed decreased proliferation and a reduced total number of branching tubules in three-dimensional human dermal organoid ex vivo culture...
November 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29138913/postoperative-albumin-bilirubin-grade-change-predicts-the-prognosis-of-patients-with-hepatitis-b-related-hepatocellular-carcinoma-within-the-milan-criteria
#7
Chuan Li, Xiao-Yun Zhang, Wei Peng, Tian-Fu Wen, Lu-Nan Yan, Bo Li, Jia-Yin Yang, Wen-Tao Wang, Ming-Qing Xu
OBJECTIVE: Albumin-bilirubin (ALBI) grade has been validated as a simple, evidence-based, and objective prognostic tool for patients with hepatocellular carcinoma (HCC). However, minimal information is available concerning postoperative ALBI grade changes in HCC. This study aimed to investigate the prognostic value of postoperative ALBI grade changes in patients with hepatitis B virus (HBV)-related HCC within the Milan criteria after liver resection. METHODS: Patients with HBV-related HCC within the Milan criteria who underwent liver resection between 2010 and 2016 at West China Hospital were reviewed (N = 258)...
November 14, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29137591/surgical-anatomy-and-microvascular-surgical-technique-relevant-to-experimental-renal-transplant-in-rat-employing-aortic-and-inferior-venacaval-conduits
#8
Badri Man Shrestha, John Haylor
OBJECTIVES: Rat models of renal transplant are used to investigate immunologic processes and responses to therapeutic agents before their translation into routine clinical practice. In this study, we have described details of rat surgical anatomy and our experiences with the microvascular surgical technique relevant to renal transplant by employing donor inferior vena cava and aortic conduits. MATERIALS AND METHODS: For this study, 175 rats (151 Lewis and 24 Fisher) were used to establish the Fisher-Lewis rat model of chronic allograft injury at our institution...
November 15, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29136088/abcd1-dysfunction-alters-white-matter-microvascular-perfusion
#9
Arne Lauer, Xiao Da, Mikkel Bo Hansen, Gregoire Boulouis, Yangming Ou, Xuezhu Cai, Afonso Liberato Celso Pedrotti, Jayashree Kalpathy-Cramer, Paul Caruso, Douglas L Hayden, Natalia Rost, Kim Mouridsen, Florian S Eichler, Bruce Rosen, Patricia L Musolino
Cerebral X-linked adrenoleukodystrophy is a devastating neurodegenerative disorder caused by mutations in the ABCD1 gene, which lead to a rapidly progressive cerebral inflammatory demyelination in up to 60% of affected males. Selective brain endothelial dysfunction and increased permeability of the blood-brain barrier suggest that white matter microvascular dysfunction contributes to the conversion to cerebral disease. Applying a vascular model to conventional dynamic susceptibility contrast magnetic resonance perfusion imaging, we demonstrate that lack of ABCD1 function causes increased capillary flow heterogeneity in asymptomatic hemizygotes predominantly in the white matter regions and developmental stages with the highest probability for conversion to cerebral disease...
November 9, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29135346/cerebral-artery-myogenic-reactivity-the-next-frontier-in-developing-effective-interventions-for-subarachnoid-hemorrhage
#10
Darcy Lidington, Jeffrey T Kroetsch, Steffen-Sebastian Bolz
Aneurysmal subarachnoid hemorrhage (SAH) is a devastating cerebral event that kills or debilitates the majority of those afflicted. The blood that spills into the subarachnoid space stimulates profound cerebral artery vasoconstriction and consequently, cerebral ischemia. Thus, once the initial bleeding in SAH is appropriately managed, the clinical focus shifts to maintaining/improving cerebral perfusion. However, current therapeutic interventions largely fail to improve clinical outcome, because they do not effectively restore normal cerebral artery function...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29134197/directed-differentiation-of-human-pluripotent-stem-cells-to-blood-brain-barrier-endothelial-cells
#11
Tongcheng Qian, Shaenah E Maguire, Scott G Canfield, Xiaoping Bao, William R Olson, Eric V Shusta, Sean P Palecek
The blood-brain barrier (BBB) is composed of specialized endothelial cells that are critical to neurological health. A key tool for understanding human BBB development and its role in neurological disease is a reliable and scalable source of functional brain microvascular endothelial cells (BMECs). Human pluripotent stem cells (hPSCs) can theoretically generate unlimited quantities of any cell lineage in vitro, including BMECs, for disease modeling, drug screening, and cell-based therapies. We demonstrate a facile, chemically defined method to differentiate hPSCs to BMECs in a developmentally relevant progression via small-molecule activation of key signaling pathways...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29132649/doppler-versus-thermodilution-derived-coronary-microvascular-resistance-to-predict-coronary-microvascular-dysfunction-in-patients-with-acute-myocardial-infarction-or-stable-angina-pectoris
#12
Rupert P Williams, Guus A de Waard, Kalpa De Silva, Matthew Lumley, Kaleab Asrress, Satpal Arri, Howard Ellis, Awais Mir, Brian Clapp, Amedeo Chiribiri, Sven Plein, Paul F Teunissen, Maurits R Hollander, Michael Marber, Simon Redwood, Niels van Royen, Divaka Perera
Coronary microvascular resistance is increasingly measured as a predictor of clinical outcomes, but there is no accepted gold-standard measurement. We compared the diagnostic accuracy of 2 invasive indices of microvascular resistance, Doppler-derived hyperemic microvascular resistance (hMR) and thermodilution-derived index of microcirculatory resistance (IMR), at predicting microvascular dysfunction. A total of 54 patients (61 ± 10 years) who underwent cardiac catheterization for stable coronary artery disease (n = 10) or acute myocardial infarction (n = 44) had simultaneous intracoronary pressure, Doppler flow velocity and thermodilution flow data acquired from 74 unobstructed vessels, at rest and during hyperemia...
October 10, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29131071/highly-selective-endothelin-1-receptor-a-inhibition-prevents-bleomycin-induced-pulmonary-inflammation-and-fibrosis-in-mice
#13
Nikolaos Manitsopoulos, Ioanna Nikitopoulou, Nikolaos A Maniatis, Christina Magkou, Anastasia Kotanidou, Stylianos E Orfanos
BACKGROUND: Pulmonary fibrosis is a chronic disease, which progressively leads to respiratory failure and ultimately death. Endothelin-1 (ET-1), a vasoconstrictor secreted by endothelial cells, promotes vasoconstriction by activation of its receptors A and B. OBJECTIVES: We addressed the role of highly selective ET-1 receptor A (ETA) inhibition in the pathogenesis of experimental pulmonary fibrosis by bleomycin (BLM). METHODS: BLM sulfate (2 U/mL) or saline was intratracheally administered to C57/Bl6 mice (4 groups; n = 5-11/group)...
November 9, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/29130567/treatment-strategies-in-coronary-microvascular-dysfunction-a-systematic-review-of-interventional-studies
#14
Hannah E Suhrs, Marie M Michelsen, Eva Prescott
Coronary microvascular dysfunction has been associated with a wide spectrum of diseases and conditions, and it has proven to be a strong prognostic marker of morbidity and mortality. Despite increased attention guideline-based treatment recommendations are lacking. We performed a systematic review of pharmacological and non-pharmacological interventions to improve coronary perfusion, assessed by intracoronary Doppler, transthoracic Doppler echocardiography, positron emission tomography, cardiac magnetic resonance imaging, transthoracic contrast perfusion echocardiography and dilution techniques...
November 11, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/29130554/sensory-recovery-of-myomucosal-flap-oral-cavity-reconstructions
#15
Olindo Massarelli, Luigi Angelo Vaira, Andrea Biglio, Roberta Gobbi, Giovanni Dell'aversana Orabona, Giacomo De Riu
BACKGROUND: Sensory restoration of the oral cavity is a primary aim of reconstructive surgery in posttraumatic or postablative defects. Sensitivity plays a key role in oral function, whose impairment strongly affects the patient's quality of life. Cheek myomucosal flaps provide a reliable and tissue-like reconstruction of these regions but their sensitive recovery, which we still know little about, deserves thorough assessment. METHODS: In this retrospective study, the myomucosal cheek flaps were tested for different aspects of sensory recovery: touch; 2-point discrimination; pain; sharp/smooth discrimination; ability to feel hot/cold stimulus; stereognosis; and taste...
November 11, 2017: Head & Neck
https://www.readbyqxmd.com/read/29130101/the-recombinant-egfr-cd13-bi-targeted-fusion-protein-induces-apoptosis-and-blocks-tube-formation
#16
Weijin Sheng, Jianhua Gong, Min Jiang, Yongsu Zhen
Previously it was shown that the recombinant EGFR/CD13 bi-targeted fusion protein ER(Fv)‑LDP-NGR which consists of an anti‑EGFR scFv antibody fragment, a tri‑cyclic NGR peptide, and a lidamycin-derived apoprotein, inhibited the proliferation of cancer cells and markedly suppressed tumor growth of breast carcinoma MCF-7 xenografts in athymic mice. This study investigated the mechanism of action of the fusion protein. Human breast cancer MCF-7 cells, lung adenocarcinoma A549 cells, and microvascular endothelial HMEC‑1 cells were used for a series of assays and determinations...
December 2017: Oncology Reports
https://www.readbyqxmd.com/read/29128907/a-new-conditionally-immortalized-human-fetal-brain-pericyte-cell-line-establishment-and-functional-characterization-as-a-promising-tool-for-human-brain-pericyte-studies
#17
Kenta Umehara, Yuchen Sun, Satoshi Hiura, Koki Hamada, Motoyuki Itoh, Keita Kitamura, Motohiko Oshima, Atsushi Iwama, Kosuke Saito, Naohiko Anzai, Kan Chiba, Hidetaka Akita, Tomomi Furihata
While pericytes wrap around microvascular endothelial cells throughout the human body, their highest coverage rate is found in the brain. Brain pericytes actively contribute to various brain functions, including the development and stabilization of the blood-brain barrier (BBB), tissue regeneration, and brain inflammation. Accordingly, detailed characterization of the functional nature of brain pericytes is important for understanding the mechanistic basis of brain physiology and pathophysiology. Herein, we report on the development of a new human brain pericyte cell line, hereafter referred to as the human brain pericyte/conditionally immortalized clone 37 (HBPC/ci37)...
November 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29128669/wip1-regulates-blood-brain-barrier-function-and-neuro-inflammation-induced-by-lipopolysaccharide-via-the-sonic-hedgehog-signaling-signaling-pathway
#18
Hong Zhen, Lize Zhao, Zhangjun Ling, Li Kuo, Xiarui Xue, Jiaxiu Feng
The blood brain barrier (BBB) is a diffusion barrier that maintains the brain environment. Wip1 is a nuclear phosphatase induced by many factors and involved in various stresses, tumorigenesis, organismal aging, and neurogenesis. Wip1's role in BBB integrity has not been thoroughly investigated. The purpose of the present study was to investigate the effect and mechanism of Wip1 on lipopolysaccharide (LPS)-induced BBB dysfunction and inflammation in an in vitro BBB model. The in vitro BBB model was established by co-culturing human brain-microvascular endothelial cells and human astrocytes and then exposing them to 1μg/ml LPS for 6, 12, 18, 24, and 48h...
November 9, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29128001/dynamic-contrast-enhanced-mr-imaging-in-head-and-neck-cancer
#19
REVIEW
Suraj J Kabadi, Girish M Fatterpekar, Yoshimi Anzai, Jonathan Mogen, Mari Hagiwara, Sohil H Patel
Dynamic contrast-enhanced (DCE) MR imaging uses rapid sequential MR image acquisition before, during, and after intravenous contrast administration to elucidate information on the microvascular biologic function of tissues. The derived pharmacokinetic parameters provide useful information on tissue perfusion and permeability that may help to evaluate entities that otherwise appear similar by conventional imaging. When specifically applied to the evaluation of head and neck cancer, DCE-MR imaging may provide valuable information to help predict treatment response, discriminate between posttreatment changes and residual tumor, and discriminate between various head and neck neoplasms...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29125867/effects-of-cognate-non-cognate-and-synthetic-cxcr4-and-ackr3-ligands-on-human-lung-endothelial-cell-barrier-function
#20
You-Hong Cheng, Jonathan M Eby, Heather M LaPorte, Brian F Volkman, Matthias Majetschak
Recent evidence suggests that chemokine CXCL12, the cognate agonist of chemokine receptors CXCR4 and ACKR3, reduces thrombin-mediated impairment of endothelial barrier function. A detailed characterization of the effects of CXCL12 on thrombin-mediated human lung endothelial hyperpermeability is lacking and structure-function correlations are not available. Furthermore, effects of other CXCR4/ACKR3 ligands on lung endothelial barrier function are unknown. Thus, we tested the effects of a panel of CXCR4/ACKR3 ligands (CXCL12, CXCL11, ubiquitin, AMD3100, TC14012) and compared the CXCR4/ACKR3 activities of CXCL12 variants (CXCL12α/β, CXCL12(3-68), CXCL121, CXCL122, CXCL12-S-S4V, CXCL12-R47E, CXCL12-K27A/R41A/R47A) with their effects on human lung endothelial barrier function in permeability assays...
2017: PloS One
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