3,548 results match your criteria Microvascular research[Journal]


Retinal microvascular development in the first two years.

Microvasc Res 2019 Apr 11. Epub 2019 Apr 11.

Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium.

The link between in utero and early life insults and the development of chronic illness remains to be fully understood, but there is increasing data to indicate that microvasculature pathology plays an important mechanistic role. Currently available data indicate that retinal microvasculature changes are detectable in children as young as six years of age, however, there are no data for younger children. We present retinal microvasculature measurement from the first two years of life. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.04.005DOI Listing

Myogenic tone contributes to the regulation of permeability in mesenteric microvessels.

Microvasc Res 2019 Apr 8. Epub 2019 Apr 8.

Department of Surgery, University of Vermont, Given Medical Building E301, 89 Beaumont Ave, Burlington, VT 05405, United States; Department of Pharmacology, University of Vermont, Given Medical Building E301, 89 Beaumont Ave, Burlington, VT 05405, United States. Electronic address:

The microvascular endothelium plays a key role in regulating solute permeability in the gut, but the contribution of vascular smooth muscle to barrier function is unknown. We sought to determine the role of vascular smooth muscle and its myogenic tone in the vascular barrier to solutes in mesenteric microvessels. We determined vascular permeability to 4. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.04.003DOI Listing

Correlations between nailfold microvascular damage and skin involvement in systemic sclerosis patients.

Microvasc Res 2019 Apr 8. Epub 2019 Apr 8.

Research Laboratory and Academic Division of Clinical Rheumatology, Department of Internal Medicine (Di.M.I.), IRCCS San Martino Polyclinic Hospital, University of Genova, Genoa, Italy.

Objective: The aim of this study was to identify any correlations between microvascular damage, assessed by nailfold videocapillaroscopy and skin impairment, evaluated by three different methods, the modified Rodnan skin score (mRSS), skin high-frequency ultrasound (US) and the plicometer skin test (PST) in systemic sclerosis (SSc) patients.

Methods: Sixty-three SSc patients and 63 healthy subjects were enrolled. Nailfold videocapillaroscopy (NVC) was used to assess the nailfold capillaroscopy pattern ("Early", "Active" or "Late"), according to the Cutolo classification. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.04.004DOI Listing
April 2019
1 Read

Corrigendum to "The radiosensitivity of endothelial cells isolated from human breast cancer and normal tissue in vitro" [Microvasc. Res. 84 (2012) 140-148].

Microvasc Res 2019 Apr 5. Epub 2019 Apr 5.

Department of Microbiology, Center for Advanced Medical Education by BK21 Project, College of Medicine, Inha University, Incheon 400-712, Republic of Korea. Electronic address:

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http://dx.doi.org/10.1016/j.mvr.2019.04.001DOI Listing
April 2019
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Assessment of cutaneous microcirculation by laser Doppler flowmetry in type 1 diabetes.

Microvasc Res 2019 Apr 6;124:91-96. Epub 2019 Apr 6.

Dept. of Internal Medicine, Diabetes Unit, San Jacopo Hospital of Pistoia, Italy.

Background: The burden of type 1 diabetes (T1D) is growing worldwide, stressing the requirement to limit the threat of its long-term complications. In this regard, the development of methods for the early diagnosis and non-invasive monitoring of vascular abnormalities is widely recognized as one of the greatest priorities of the clinical research in this field.

Objective: To assess the deterioration of physiological properties extracted from laser Doppler flowmetry (LDF) signals of microvascular perfusion and, secondly, to investigate their association with the quality of long-term metabolic control. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.04.002DOI Listing
April 2019
1 Read

DLL4 and Jagged1 are angiogenic targets of orphan nuclear receptor TR3/Nur77.

Microvasc Res 2019 Mar 28;124:67-75. Epub 2019 Mar 28.

Center for Vascular Biology Research and Division of Gastroenterology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA. Electronic address:

Pathological angiogenesis is a hallmark of many diseases. Previously, we reported that orphan nuclear receptor TR3/Nur77 was a critical mediator of angiogenesis to regulate tumor growth and skin wound healing via regulating the expression of the junctional proteins and integrins. However, the molecular mechanism, by which TR3/Nur77 regulates angiogenesis is not completely understood. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.006DOI Listing
March 2019
2 Reads

Comparison of transport of chemotherapeutic drugs in voxelized heterogeneous model of human brain tumor.

Microvasc Res 2019 Mar 26;124:76-90. Epub 2019 Mar 26.

Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016, India. Electronic address:

Systemic administration of chemotherapeutic drugs is widely used in the treatment of cancer. However, a good understanding of drug transport barriers that influence the treatment efficacy is still lacking. In this study, a voxelized numerical model based on dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) and computational fluid dynamics (CFD) is employed to study the transport and efficacy of three different chemotherapeutic drugs, namely methotrexate, doxorubicin and cisplatin in human brain tumors. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.003DOI Listing
March 2019
2.126 Impact Factor

Monomeric α-synuclein induces blood-brain barrier dysfunction through activated brain pericytes releasing inflammatory mediators in vitro.

Microvasc Res 2019 Mar 15;124:61-66. Epub 2019 Mar 15.

Department of Pharmaceutical Care and Health Sciences, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan. Electronic address:

Blood-brain barrier (BBB) disruption is often mediated by neuroinflammation, and occurs during various neurodegenerative diseases including Parkinson's disease (PD). PD is characterized by loss of dopaminergic neurons and aggregated α-synuclein protein in inclusions known as Lewy bodies. Misfolded α-synuclein has been implicated in neurodegeneration and neuroinflammation through activation of microglia and astrocytes. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.005DOI Listing
March 2019
2 Reads

Microvascular abnormalities in asymptomatic chronic smokers: A videocapillaroscopic study.

Microvasc Res 2019 Mar 12;124:51-53. Epub 2019 Mar 12.

Dermatology Department, Faculty of Medicine, Ondokuz Mayis University, Turkey.

Cigarette smoking is reportedly associated with coronary, cerebral, and peripheral vascular diseases. Nailfold videocapillaroscopy is a noninvasive imaging technique used to examine the microvasculature. In this study we aim to investigate the capillaroscopic abnormalities of asymptomatic chronic smokers (N = 30), and compare findings to those of healthy nonsmokers (N = 30). Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.004DOI Listing
March 2019
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The microvascular response in the skin to topical application of methyl nicotinate: Effect of concentration and variation between skin sites.

Microvasc Res 2019 Mar 12;124:54-60. Epub 2019 Mar 12.

Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden; Department of Plastic Surgery, Hand Surgery, and Burns, Linköping University, Linköping, Sweden.

Background: Methyl nicotinate (MN) induces a local cutaneous erythema in the skin and may be used as a local provocation in the assessment of microcirculation and skin viability. The aims were to measure the effects of increasing doses of MN, to find the concentration that yields the most reproducible effect from day to day and between sites, and to study the variation between skin sites.

Methods: Microvascular responses to topically applied MN at different concentrations were measured in 12 subjects on separate days and on contralateral sides, using laser speckle contrast imaging (LSCI). Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.002DOI Listing
March 2019
1 Read

Correlation between acute degradation of the endothelial glycocalyx and microcirculation dysfunction during cardiopulmonary bypass in cardiac surgery.

Microvasc Res 2019 Mar 10;124:37-42. Epub 2019 Mar 10.

Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province 325000, China. Electronic address:

Objective: The association between the shedding of the endothelial glycocalyx (EG) and the pathogenesis of microcirculatory perfusion disturbances has been discussed in experimental studies. This discussion, however, has limited relevance in a clinical setting. We investigated EG shedding in patients undergoing cardiopulmonary bypass (CPB) and its association with alterations in microvascular perfusion. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.004DOI Listing

miR-205-5p suppresses pulmonary vascular smooth muscle cell proliferation by targeting MICAL2-mediated Erk1/2 signaling.

Microvasc Res 2019 Mar 7;124:43-50. Epub 2019 Mar 7.

Department of Ultrasonography, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, China. Electronic address:

Pulmonary arterial hypertension (PAH) is a devastating and fatal vascular disease for which currently there is no satisfying therapy available. Excessive cell proliferation of pulmonary arterial smooth muscle cells (PASMCs) contributes significantly to PAH pathogenesis. In this study, we found that miR-205-5p was lowly expressed in hypoxia-induced PAH mouse model and hypoxia-treated PASMCs. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.03.001DOI Listing

Migration velocity of red blood cells in microchannels.

Microvasc Res 2019 Mar 2;124:30-36. Epub 2019 Mar 2.

Université Grenoble Alpes, CNRS, LIPhy, Grenoble F-38000, France.

The lateral migration of red blood cells (RBCs) in confined channel flows is an important ingredient of microcirculatory hydrodynamics and is involved in the development of a cell free layer near vessel walls and influences the distribution of RBCs in networks. It is also relevant to a number of lab-on-chip applications. This migration is a consequence of their deformability and is due to the combined effects of hydrodynamic wall repulsion and the curvature of the fluid velocity profile. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.003DOI Listing

Microvascular reactivity in rehabilitating cardiac patients based on measurements of retinal blood vessel diameters.

Microvasc Res 2019 Feb 23;124:25-29. Epub 2019 Feb 23.

Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium; Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium. Electronic address:

Background: Exercise-based rehabilitation improves general cardiovascular fitness. The impact on the microvascular system has been studied in less detail. We measured changes in retinal blood vessel diameters, as a proxy for microvascular reactivity, in cardiac patients and we assessed the impact of a rehabilitation program on retinal vessel diameters. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.006DOI Listing
February 2019
1 Read

Flow Mediated Skin Fluorescence technique reveals remarkable effect of age on microcirculation and metabolic regulation in type 1 diabetes.

Microvasc Res 2019 Feb 23;124:19-24. Epub 2019 Feb 23.

Angionica Ltd., Lodz, Poland; Institute of Applied Radiation Chemistry, Lodz University of Technology, Lodz, Poland. Electronic address:

Study Description: Flow Mediated Skin Fluorescence (FMSF) is a novel technique for non-invasive evaluation of the microcirculation and metabolic regulation. This study describes the diagnostic potential of FMSF for type 1 diabetes (DM1).

Study Population: All study participants, in both the control (n = 31) and DM1 (n = 40) groups, were between the ages of 30-49 y. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.005DOI Listing
February 2019
4 Reads

Continuous monitoring of interstitial tissue oxygen using subcutaneous oxygen microsensors: In vivo characterization in healthy volunteers.

Microvasc Res 2019 Feb 8;124:6-18. Epub 2019 Feb 8.

Profusa Inc., South San Francisco, CA, USA.

Measurements of regional tissue oxygen serve as a proxy to monitor local perfusion and have the potential to guide therapeutic decisions in multiple clinical disciplines. Transcutaneous oximetry (tcpO) is a commercially available noninvasive technique that uses an electrode to warm underlying skin tissue and measure the resulting oxygen tension at the skin surface. A novel approach is to directly measure interstitial tissue oxygen using subcutaneous oxygen microsensors composed of a biocompatible hydrogel carrier platform with embedded oxygen sensing molecules. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.002DOI Listing
February 2019
5 Reads

Extended-wavelength diffuse reflectance spectroscopy for a comprehensive view of blood perfusion and tissue response in human forearm skin.

Microvasc Res 2019 Feb 2;124:1-5. Epub 2019 Feb 2.

Lund University, Skane University Hospital, Department of Clinical Sciences Lund, Ophthalmology, Lund, Sweden. Electronic address:

Background: The aim of this study was to investigate the possibility of using extended-wavelength diffuse reflectance spectroscopy (EW-DRS) to measure tissue response related to blood perfusion. The study was performed on a model that we have previously found to be useful for studying techniques for perfusion monitoring following the injection of epinephrine in a local anesthetic in the human forearm.

Methods: Nine healthy subjects were included in the study. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.02.001DOI Listing
February 2019
1 Read

Image-based spatio-temporal model of drug delivery in a heterogeneous vasculature of a solid tumor - Computational approach.

Microvasc Res 2019 05 31;123:111-124. Epub 2019 Jan 31.

Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran.

The solute transport distribution in a tumor is an important criterion in the evaluation of the cancer treatment efficacy. The fraction of killed cells after each treatment can quantify the therapeutic effect and plays as a helpful tool to evaluate the chemotherapy treatment schedules. In the present study, an image-based spatio-temporal computational model of a solid tumor is provided for calculation of interstitial fluid flow and solute transport. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183009
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http://dx.doi.org/10.1016/j.mvr.2019.01.005DOI Listing
May 2019
5 Reads

Inhaled carbon monoxide increases vasodilation in the microvascular circulation.

Microvasc Res 2019 05 15;123:92-98. Epub 2019 Jan 15.

Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada; Department of Obstetrics & Gynaecology, Queen's University, Kingston, Ontario, Canada. Electronic address:

Preeclampsia (PE) is characterized by systemic maternal endothelial dysfunction. Changes in endothelial reactivity have been reported before the onset of clinical signs of PE, and continuing into the post-partum period. Women who smoke during pregnancy have a 33% reduced risk of developing PE. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183021
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http://dx.doi.org/10.1016/j.mvr.2019.01.004DOI Listing
May 2019
18 Reads

Effect of varying viscosity on two-fluid model of pulsatile blood flow through porous blood vessels: A comparative study.

Microvasc Res 2019 05 11;123:99-110. Epub 2019 Jan 11.

Department of Mathematics, Birla Institute of Technology & Science Pilani, Rajasthan 333 031, India. Electronic address:

Present work concerns the pulsatile blood flow of two-fluid model through porous blood vessels under the effect of radially varying viscosity. Blood is modeled as two-phase fluid model consisting a core region by non-Newtonian (Herschel-Bulkley) fluid and a plasma region modeled as Newtonian fluid. No slip condition has been used on wall and pressure gradient is taken as periodic function of time. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.01.003DOI Listing

Mesenchymal stem cells transfer mitochondria into cerebral microvasculature and promote recovery from ischemic stroke.

Microvasc Res 2019 05 3;123:74-80. Epub 2019 Jan 3.

Department of Neurology, Qilu Hospital of Shandong University, Jinan, Shandong, China.

Mesenchymal stem cells can be used as a novel treatment of ischemic stroke, but their therapeutic effect and mechanism of action require further evaluation. Mitochondrial dysfunction has core functions in ischemia-reperfusion stroke injury. Our recent research has demonstrated that mesenchymal stem cells can transfer their functional mitochondria to injured endothelial cells via tunneling nanotubes in vitro, resulting in the rescue of aerobic respiration and protection of endothelial cells from apoptosis. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.01.001DOI Listing
May 2019
1 Read

The impact of autoimmune thyroiditis on skin microcirculation in children with non-complicated type 1 diabetes mellitus.

Microvasc Res 2019 05 3;123:68-73. Epub 2019 Jan 3.

Clinical Physiology Unit, Medical Simulation Centre, Medical University of Gdańsk, Ul. Dębowa 25, 80-204 Gdańsk, Poland.

Background: The impairment of endothelial function in type 1 diabetes mellitus (DM1) is considered as the basis of microvascular complications. In DM1 patients autoimmune thyroiditis is a frequent comorbidity which may be responsible for further deterioration of microcirculation function. In studies investigating the relationship between cardiovascular risk factors and microvascular function, skin microcirculation is widely used. Read More

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http://dx.doi.org/10.1016/j.mvr.2019.01.002DOI Listing
May 2019
2 Reads

The role of reactive oxygen species in angiogenesis and preventing tissue injury after brain ischemia.

Authors:
Jiping Yang

Microvasc Res 2019 05 27;123:62-67. Epub 2018 Dec 27.

Department of Medical Imaging, The Second Hospital of Hebei Medical University, 215 West Heping Road, Shijiazhuang 050000, Hebei Province, China. Electronic address:

Oxidative stress, which is defined as an imbalance between proxidant and antioxidant systems, is the essential mechanism involving in the ischemic process. During the early stage of brain ischemia, reactive oxygen species (ROS) are increased. Increased ROS are thought of a consequence of brain ischemia and exacerbating disease due to inducing cell death, apoptosis and senescence by oxidative stress. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183017
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http://dx.doi.org/10.1016/j.mvr.2018.12.005DOI Listing
May 2019
1 Read

Absolute quantification (ml blood/sec ∗ mm tissue) of normal vs. diabetic foot skin microvascular blood perfusion: Feasibility of FM-PPG measurements under clinical conditions.

Microvasc Res 2019 05 24;123:58-61. Epub 2018 Dec 24.

University of Maryland School of Medicine, Dept. of Emergency Medicine, United States of America. Electronic address:

Fluorescence-mediated photoplethysmography (FM-PPG) is the first routine clinical methodology by which to quantifiably measure tissue blood perfusion in absolute terms (mL blood/sec ∗ mm tissue). The FM-PPG methodology has been described in detail previously in this journal (MVR 114, 2017, 92-100), along with initial proof-of-concept measurements of blood perfusion in both ocular and forearm skin tissues. The motivation for the current study was to investigate whether FM-PPG can be used readily and routinely under realistic clinical conditions. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.12.004DOI Listing

Evaluation of skeletal muscle perfusion in canine hind limb ischemia model using color-coded digital subtraction angiography.

Microvasc Res 2019 05 18;123:81-85. Epub 2018 Dec 18.

Department of Diagnostic Radiology, City of Hope National Medical Center, Duarte, CA, United States.

Objective: To evaluate perfusion alterations in skeletal muscle in a canine hind limb ischemia model using color-coded digital subtraction angiography (CC-DSA).

Methods: Twelve beagles underwent embolization at the branch of their left deep femoral artery. Right hind limbs were used as the control group. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183021
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http://dx.doi.org/10.1016/j.mvr.2018.12.003DOI Listing
May 2019
15 Reads

Generation of an immortalized human choroid endothelial cell line (iChEC-1) using an endothelial cell specific promoter.

Microvasc Res 2019 05 18;123:50-57. Epub 2018 Dec 18.

Institute for Vision Research, The University of Iowa, Iowa City, IA, USA; Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, IA, USA. Electronic address:

Age-related macular degeneration (AMD) is a common cause of blindness worldwide. While recent studies have revealed that the loss of choroidal endothelial cells (ChECs) is critical to the disease pathogenesis of dry AMD, in vitro studies are needed to fully elucidate the disease mechanism. However, these studies remain hindered due to the lack of publically available human ChEC lines. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183022
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http://dx.doi.org/10.1016/j.mvr.2018.12.002DOI Listing
May 2019
9 Reads

Oxidative stress in the choroid plexus contributes to blood-cerebrospinal fluid barrier disruption during sepsis development.

Microvasc Res 2019 05 13;123:19-24. Epub 2018 Dec 13.

Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of South Santa Catarina, Tubarão, SC, Brazil. Electronic address:

Background: The choroid plexus (CP), main component of blood-cerebrospinal fluid barrier (BCSFB), protects the brain from peripheral inflammation similar to the blood-brain barrier. Thus, CP is considered a critical target site of oxidative damage, which in sepsis oxidative stress is likely to be a major step in the development of brain damage. Functional alterations in CP may be associated with sepsis-induced brain injury. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.12.001DOI Listing
May 2019
11 Reads

Electroosmosis modulated transient blood flow in curved microvessels: Study of a mathematical model.

Microvasc Res 2019 05 10;123:25-34. Epub 2018 Dec 10.

Department of Sciences and Humanities, National Institute of Technology, Uttarakhand 246174, India. Electronic address:

The flow through curved microvessels has more realistic applications in physiological transport phenomena especially in blood flow through capillary and microvessels. Motivated by the biomicrofluidics applications, a mathematical model is developed to describe the blood flow inside a curved microvessel driven by electroosmosis. In addition to this flow, the channel experiences electric double layer phenomenon due to zeta potential about -25 mV. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.012DOI Listing

A simple automated method for continuous fieldwise measurement of microvascular hemodynamics.

Microvasc Res 2019 05 28;123:7-13. Epub 2018 Nov 28.

Department of Medicine, Indiana University, Indianapolis, IN, USA. Electronic address:

Microvascular perfusion dynamics are vital to physiological function and are frequently dysregulated in injury and disease. Typically studies measure microvascular flow in a few selected vascular segments over limited time, failing to capture spatial and temporal variability. To quantify microvascular flow in a more complete and unbiased way we developed STAFF (Spatial Temporal Analysis of Fieldwise Flow), a macro for FIJI open-source image analysis software. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6379124PMC
May 2019
6 Reads

Geometric, elastic and contractile-relaxation changes in coronary arterioles induced by Vitamin D deficiency in normal and hyperandrogenic female rats.

Microvasc Res 2019 03 28;122:78-84. Epub 2018 Nov 28.

2nd Department of Obstetrics and Gynecology, Semmelweis University, Faculty of Medicine, Budapest, Hungary.

Vitamin D (VitD) hypovitaminosis and androgen excess (AE) are both risk factors for cardiovascular diseases in fertile women. However, the possible early interaction between AE and VitD status is not clear. Our goal was to describe how VitD status influences early changes in the biomechanical reactivity of small coronary arterioles in adult female rats after transdermal testosterone treatment. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.011DOI Listing
March 2019
1 Read

Evaluation of serum sST2 and sCD40L values in patients with microvascular angina.

Microvasc Res 2019 03 28;122:85-93. Epub 2018 Nov 28.

Department of Cardiology, Koc University School of Medicine and Hospital, Istanbul, Turkey.

Objectives: Coronary microvascular dysfunction plays a major role in the pathogenesis of microvascular angina (MVA). Along with endothelial dysfunction, microvascular atherosclerosis and inflammation seem to contribute to the development of coronary microvascular dysfunction. Serum soluble ST2 (sST2) and serum soluble CD40 ligand (sCD40L) are two biomarkers associated with inflammation and atherosclerosis. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.009DOI Listing
March 2019
5 Reads

High thoracic sympathetic block improves coronary microcirculation disturbance in rats with chronic heart failure.

Microvasc Res 2019 03 1;122:94-100. Epub 2018 Dec 1.

Department of Cardiac Ultrasound, the First Affiliated Hospital of Harbin Medical University, Harbin, China.

Introduction: Coronary microcirculation disturbance plays an important role in chronic heart failure (CHF). High thoracic sympathetic block (HTSB) is effective to treat CHF, but its impact on coronary microcirculation is unclear.

Methods: Forty male Wistar rats were subcutaneously injected with isoproterenol (340 mg/kg) for 2 days. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.013DOI Listing
March 2019
3 Reads

Altered blood rheology and impaired pressure-induced cutaneous vasodilation in a mouse model of combined type 2 diabetes and sickle cell trait.

Microvasc Res 2019 03 1;122:111-116. Epub 2018 Dec 1.

UMR 5305 CNRS, Lyon, France; Université de Lyon 1, UMR 5305, Lyon, France.

Objective: Type 2 diabetes (T2D)-related vascular dysfunction and hemorheological abnormalities could possibly be amplified by sickle cell trait (SCT). These alterations could potentially increase the risk of vascular complications in individuals with combined T2D and SCT. Therefore, this study used a mouse model to determine whether vascular function and blood rheology were more severely altered in combined T2D and SCT than in T2D or SCT alone. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.014DOI Listing
March 2019
3 Reads

Positive pressure ventilation compresses pulmonary acinar microvessels but not their supply vessels.

Microvasc Res 2019 03 24;122:71-77. Epub 2018 Nov 24.

The William S. Middleton Memorial Veterans Hospital, Madison, WI 53705-2286, United States of America.

Pulmonary alveolar septal capillaries receive their perfusion from a web of larger surrounding acinar vessels. Using 4 μm diam. Latex particles, we showed that positive pressure ventilation narrowed the acinar vessels as evidenced by venous 4 μm particle concentrations and perfusate flows <50% of particle concentrations in negative pressure ventilated lungs. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.008DOI Listing
March 2019
3 Reads

Comparison of organ-specific endothelial cells in terms of microvascular formation and endothelial barrier functions.

Microvasc Res 2019 03 22;122:60-70. Epub 2018 Nov 22.

School of Integrated Design Engineering, Keio University, Japan; Department of System Design Engineering, Keio University, Japan. Electronic address:

Every organ demonstrates specific vascular characteristics and functions maintained by interactions of endothelial cells (ECs) and parenchymal cells. Particularly, brain ECs play a central role in the formation of a functional blood brain barrier (BBB). Organ-specific ECs have their own morphological features, and organ specificity must be considered when investigating interactions between ECs and other cell types constituting a target organ. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183021
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http://dx.doi.org/10.1016/j.mvr.2018.11.007DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6294313PMC
March 2019
3 Reads

Improvement of microvascular endothelial dysfunction induced by exercise and diet is associated with microRNA-126 in obese adolescents.

Microvasc Res 2019 05 22;123:86-91. Epub 2018 Nov 22.

Department of Physical Education, Zhejiang University of Technology, Hangzhou, China.

Objective: Microvascular endothelial dysfunction, which is at the early stage of atherosclerosis, precedes macrovascular endothelial dysfunction. The study is aimed to investigate the mechanism underlying the improvement of microvascular endothelial dysfunction by exercise and diet in obese adolescents.

Methods: A quasi-randomized study was carried out with 2 cohorts: the experimental group (57 obese male adolescents; age: 15. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.009DOI Listing
May 2019
17 Reads

Numerical simulations of the microvascular fluid balance with a non-linear model of the lymphatic system.

Microvasc Res 2019 03 16;122:101-110. Epub 2018 Nov 16.

LaBS, Chemistry, Material and Chemical Engineering Department "Giulio Natta", Politecnico di Milano, Italy.

Fluid homeostasis is required for life. Processes involved in fluid balance are strongly related to exchanges at the microvascular level. Computational models have been presented in the literature to analyze the microvascular-interstitial interactions. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00262862183003
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http://dx.doi.org/10.1016/j.mvr.2018.11.003DOI Listing
March 2019
19 Reads

Differences in capillary recruitment between cardiac surgery and septic patients after fluid resuscitation.

Microvasc Res 2019 05 16;123:14-18. Epub 2018 Nov 16.

Department of Intensive Care, Medical Center Leeuwarden, Leeuwarden, The Netherlands.

Background: Clinical evaluation of the effects of fluid therapy remains cumbersome and strategies are based on the assumption that normalization of macrohemodynamic variables will result in parallel improvement in organ perfusion. Recently, we and others suggested the use of direct in-vivo observation of the microcirculation to evaluate the effects of fluid therapy.

Methods: A single-centre observational study, using in-vivo microscopy to assess total vessel density (TVD) in two subsets of ICU patients. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.006DOI Listing
May 2019
15 Reads

The association between near-infrared spectroscopy-derived and flow-mediated dilation assessment of vascular responsiveness in the arm.

Microvasc Res 2019 03 13;122:41-44. Epub 2018 Nov 13.

Faculty of Kinesiology, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada. Electronic address:

Introduction: Following a period of blood flow occlusion, the near-infrared spectroscopy (NIRS)-derived reperfusion slope of the oxygen saturation signal (StO) is a measure of microvascular responsiveness that has been shown to be positively correlated with flow-mediated dilation (FMD) assessment of conduit artery function in the lower limb vasculature. Given that previously established differences in structure and function of the vessels in the upper compared to the lower limbs may change this relationship, investigating whether this correlation between the reperfusion slope of the StO and the FMD response is maintained in upper limbs is important. Accordingly, this study investigated the correlation between the reperfusion slope of the StO and FMD in the arm vasculature. Read More

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March 2019
1 Read

Endothelial nitric oxide synthase protein distribution and nitric oxide production in endothelial cells along the coronary vascular tree.

Microvasc Res 2019 03 12;122:34-40. Epub 2018 Nov 12.

Department of Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America.

Objective: Freshly isolated endothelial cells from both conduit arteries and microvasculature were used to test the hypothesis that eNOS protein content and nitric oxide production in coronary endothelial cells increases with vessel radius.

Methods: Porcine hearts were obtained from a local abattoir. Large and small arteries as well as arterioles were dissected free of myocardium and homogenized as whole vessels. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6314958PMC
March 2019
11 Reads

Differences in skin blood flow oscillations between the plantar and dorsal foot in people with diabetes mellitus and peripheral neuropathy.

Microvasc Res 2019 03 9;122:45-51. Epub 2018 Nov 9.

Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, MD, USA.

Background: Understanding the differences in skin blood flow (SBF) on the plantar and dorsal foot in people with diabetes mellitus (DM) may help to assess the influence of diabetes and neuropathy on microvascular dysfunction and risks of diabetic foot ulcers in this population. However, there is no study comparing SBF oscillations between the plantar and dorsal foot in people with DM and peripheral neuropathy (PN).

Objective: The objective of this study was to compare SBF oscillations between the plantar and dorsal foot in people with DM and PN and investigate the underlying mechanisms responsible for the differences. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.002DOI Listing
March 2019
21 Reads
2.130 Impact Factor

Application of optical flow algorithms to laser speckle imaging.

Microvasc Res 2019 03 8;122:52-59. Epub 2018 Nov 8.

Department of Mechanical Engineering, University of California Riverside, Riverside, CA 92521, United States of America.

Since of its introduction in 1980s, laser speckle imaging has become a powerful tool in flow imaging. Its high performance and low cost made it one of the preferable imaging methods. Initially, speckle contrast measurements were the main algorithm for analyzing laser speckle images in biological flows. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.11.001DOI Listing

Painless local pressure application to test microvascular reactivity to ischemia.

Microvasc Res 2019 03 3;122:13-21. Epub 2018 Nov 3.

MitoVasc Institute, UMR CNRS 6015 - INSERM U 1083, Faculté de Médecine, Angers, France; Sports Medicine, University Hospital of Angers, France. Electronic address:

Background: Forearm cutaneous blood flux (CBF) measurement with post-occlusive reactive hyperemia (PORH) is uncomfortable and may not be devoid of risks. We aimed to investigate post-compression reactive hyperemia (PCRH) with a custom-made indenter that was designed to be easily used routinely by inexperienced observers.

Methods: Medical students evaluated PCRH with 1- to 4-min pressure applications of 16 to 34 kPa and PORH with 3-min forearm cuff occlusion using laser speckle contrast imaging in 15 healthy volunteers. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.013DOI Listing
March 2019
13 Reads

Age-related changes in gingival blood flow parameters measured using laser speckle flowmetry.

Microvasc Res 2019 03 27;122:6-12. Epub 2018 Oct 27.

Personal Health Care Products Research Laboratories, Kao Corporation, Tokyo, Japan.

Previous studies have suggested a possible relationship between age-related changes to human gingival hemodynamics and periodontal disease. However, firmly establishing this has been difficult because of a lack of suitable tools. Our study investigated whether a non-invasive laser speckle flowgraphy (LSFG)-based 2-dimensional technique could be used to assess maxillary anterior gingival blood flow under resting conditions. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.010DOI Listing
March 2019
10 Reads

Orphan nuclear receptor TR3/Nur77 differentially regulates the expression of integrins in angiogenesis.

Microvasc Res 2019 03 1;122:22-33. Epub 2018 Nov 1.

Center for Vascular Biology Research and Division of Gastroenterology, Departments of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA. Electronic address:

Pathological angiogenesis is a hallmark of many diseases. Previously, we reported that orphan nuclear receptor TR3/Nur77 (human homolog, Nur77, mouse homolog) is a critical mediator of angiogenesis to regulate tumor growth and skin wound healing via down-regulating the expression of the junctional proteins and integrin β4. However, the molecular mechanism, by which TR3/Nur77 regulated angiogenesis, was still not completely understood. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.011DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6294663PMC
March 2019
8 Reads
2.130 Impact Factor

Nailfold videocapillaroscopy changes in Takayasu arteritis and their association with disease activity and subclavian artery involvement.

Microvasc Res 2019 03 31;122:1-5. Epub 2018 Oct 31.

Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Introduction: Takayasu arteritis (TA) is a large vessel vasculitis characterized by the involvement of the aorta and its branches. In the present study, the nailfold videocapillaroscopy (NVC) findings of the TA patients were evaluated and compared to healthy individuals. Additionally, the association of NVC abnormalities with disease activity and subclavian artery involvement was also investigated. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.012DOI Listing
March 2019
11 Reads

Reversing effect of Lupeol on vasculogenic mimicry in murine melanoma progression.

Microvasc Res 2019 01 25;121:52-62. Epub 2018 Oct 25.

Department of Signal Transduction and Biogenic Amines, Chittaranjan National Cancer Institute, 37, S. P. Mukherjee Road, Kolkata 700026, India. Electronic address:

Vasculogenic mimicry, an endothelia-independent tumor microcirculation has been found in various cancers and is thought to be achieved by cancer stem like cells. Dacarbazine resistance is one of the most common features of melanoma and recent studies suggest that the mode of resistance is closely related to the formation of vasculogenic mimicry. In our work, we examined the anticancer effect of Lupeol, a novel phytochemical with Dacarbazine in vivo and in vitro. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.008DOI Listing
January 2019
12 Reads

Tetrahydroxystilbene glucoside-induced relaxation of the superior mesenteric artery via both endothelium-dependent and endothelium-independent mechanisms.

Microvasc Res 2019 05 25;123:42-49. Epub 2018 Oct 25.

Department of Chinese Materia Medica and Natural Medicines, Air Force Medical University, Xi'an 710032, Shanxi, China. Electronic address:

Tetrahydroxystilbene glucoside (TSG) is the main water-soluble component in Polygonum multiflorum Thunb, and it has many cardioprotective effects. Although TSG is able to relax blood vessels, its relaxation of rat superior mesenteric arteries and the underlying mechanism of this process are not clearly understood. The aim of the present study was to use in vivo and in vitro models to investigate the arterial relaxation effect of TSG on rat superior mesenteric arteries and the mechanisms involved. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.007DOI Listing
May 2019
7 Reads
2.130 Impact Factor

Bone marrow mesenchymal stem cells and condition media diminish inflammatory adhesion molecules of pulmonary endothelial cells in an ovalbumin-induced asthmatic rat model.

Microvasc Res 2019 01 18;121:63-70. Epub 2018 Oct 18.

Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address:

Objectives: Although excitements related to stem cell therapeutic outcomes have been highlighted enormously in asthma, the vast majority of works were conducted by researchers in animal models. Elucidating the mechanisms underlying the therapeutic effects of MSCs in asthmatic rats will provide a rational basis for assuring maximal safety of future clinical application of stem cells. In the current study, we sought to investigate the possible paracrine mechanism by which direct injection of MSCs and/or CM attenuate efficiently Th2-mediated inflammation in asthmatic lung tissues with the focus on ICAM-1 and VCAM-1 expression. Read More

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http://dx.doi.org/10.1016/j.mvr.2018.10.005DOI Listing
January 2019
15 Reads
2.130 Impact Factor

Glabrous and non-glabrous vascular responses to mild hypothermia.

Microvasc Res 2019 01 18;121:82-86. Epub 2018 Oct 18.

Department of Kinesiology, Brock University, St. Catharines, Canada. Electronic address:

This study examined cutaneous vasoconstriction to whole-body hypothermia, specifically contributions of neural and endothelial vasomotor responses in glabrous and non-glabrous skin. Eleven participants were semi-recumbent at an ambient temperature of 22 °C for 30 min, after which ambient temperature was decreased to 0 °C until rectal temperature (T) had decreased by 0.5 °C. Read More

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January 2019