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Combining Human Umbilical Cord Blood Cells With Erythropoietin Enhances Angiogenesis/Neurogenesis and Behavioral Recovery After Stroke
In conclusion, our results suggest that hUCBC infusion in combination with EPO administration demonstrates therapeutic efficacy in the treatment of stroke-induced injury by promoting neurogenesis and angiogenesis. Further research that delineates the therapeutic mechanism of systemically administered hUCBC and EPO is required. Ethics Statement All experimental procedures involving animals were performed in accordance with the Guide for the Care and Use of Laboratory Animals as adopted and promulgated by the U. S. National Institutes of Health and were approved by CHA University Institutional Animal Care & Use Com...
Source: Frontiers in Neurology - April 9, 2019 Category: Neurology Source Type: research

Modeling ischemic stroke in a triculture neurovascular unit on-a-chip
ConclusionsThe NVU on-a-chip model presented here can be used for fundamental studies of NVU function in stroke and other neurological diseases and for investigation of potential restorative therapies to fight neurological disorders. Due to the platform ’s relatively high throughput and compatibility with automation, the model holds potential for drug compound screening.
Source: Fluids and Barriers of the CNS - December 14, 2021 Category: Neuroscience Source Type: research

Glutamate Transport and Preterm Brain Injury
Silvia Pregnolato1*, Elavazhagan Chakkarapani1, Anthony R. Isles2 and Karen Luyt1 1Department of Neonatal Neurology, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom 2Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Cardiff University, Cardiff, United Kingdom Preterm birth complications are the leading cause of child death worldwide and a top global health priority. Among the survivors, the risk of life-long disabilities is high, including cerebral palsy and impairment of movement, cognition, and beh...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

Is Aberrant Reno-Renal Reflex Control of Blood Pressure a Contributor to Chronic Intermittent Hypoxia-Induced Hypertension?
This study demonstrated unaltered vascular conductance in response to lumbar sympathetic stimulation in CIH-exposed rats. Aortic compliance was increased and estimated blood volume was unchanged in CIH-exposed rats. Increased blood pressure was related to an increase in cardiac output, which was confirmed by echocardiography (Lucking et al., 2014). It is suggested therefore that hypertension in the CIH model can be evoked by over-excitation of the cardiac arm of sympathetic nervous system (SNS), even before mechanisms of enhanced peripheral vasoconstriction and endothelial dysfunction are initiated (Naghshin et al., 2009)....
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

A swine model of intracellular cerebral edema – Cerebral physiology and intracranial compliance
We describe a swine model of water intoxication and its cerebral histological and physiological sequela. We studied female swine weighing 35–45 kg. Four serum sodium intervals were designated: baseline, mild, moderate, and severe hyponatremia attained by infusing hypotonic saline. Intracranial fluid injections were performed to assess intracranial compliance. At baseline and following water intoxication wedge biopsy was obtained for pathological examination and electron microscopy. We studied 8 swine and found an increase in ICP that was strongly related to the decrease in serum sodium level. Mean ICP rose from a basel...
Source: Journal of Clinical Neuroscience - October 26, 2018 Category: Neuroscience Source Type: research

The role of calcium handling mechanisms in reperfusion injury.
Abstract Cardiovascular diseases, such as stroke and myocardial infarction (MI) remain the major cause of death and disability worldwide. However, the mortality of MI has declined dramatically over the past several decades because of advances in medicines (thrombolytic agents, antiplatelet drugs, beta blockers, and angiotensin converting enzyme inhibitors) and approaches to restore tissue perfusion(percutaneous coronary intervention and cardiopulmonary bypass). Animals studies have been shown that these treatments have been effective in reducing acute myocardial ischemic injury and limiting MI size. The paradox is...
Source: Current Pharmaceutical Design - November 20, 2018 Category: Drugs & Pharmacology Authors: Pittas K, Vrachatis DA, Angelidis C, Tsoucala S, Giannopoulos G, Defteros S Tags: Curr Pharm Des Source Type: research

A Novel Triple-Cell Two-Dimensional Model to Study Immune-Vascular Interplay in Atherosclerosis
Conclusions We have developed a co-culture model for the study of the immune-vascular interplay in atherosclerosis consisting of ECs, SMCs and an inflammatory compartment. In order to validate this model, we have demonstrated that the triple-cell 2D culture of ECs, SMCs, and THP-1 macrophage-like cells significantly alters the phenotype of ECs and SMCs within this culture in comparison with EC/SMC, EC/THP-1, or SMC/THP-1 double-cell cultures. Our results are indicative of the multi-directional communication between highly plastic vascular stromal cells and the immune system, which is now well recognized in the field, and ...
Source: Frontiers in Immunology - April 23, 2019 Category: Allergy & Immunology Source Type: research

Challenge to the Intestinal Mucosa During Sepsis
Conclusion The impact of sepsis on the gut is manifold, e.g., sepsis mediated alteration of the gut-blood barrier and increase in the intestinal permeability, which may correlate with the phenomena of bacterial translocation and lymphatic activation (“toxic-lymph”). Systemic consequences of sepsis are widespread and concern to the coagulative system, the microbiome as well as enzymes, such as pancreatic proteases, MMPs and IAPs. Nevertheless, the therapeutic approaches for modulating the mucosal immune system are still rarely effective in daily routine. Recent published studies showing that treatment with ...
Source: Frontiers in Immunology - April 29, 2019 Category: Allergy & Immunology Source Type: research

Dissociation between macro- and microvascular parameters in the early phase of hemorrhagic shock
Publication date: Available online 31 July 2019Source: Microvascular ResearchAuthor(s): Ronald Lima, Nivaldo Villela, Raquel Castiglione, Maria das Graças C. de Souza, Eliete BouskelaAbstractHemorrhagic shock (HS) therapy is based on macrohemodynamic improvement, but it is not clear if this therapy correlates directly with increases in tissue perfusion. Aiming to clarify this point, we compared norepinephrine (NE, a vasoconstrictor), sodium nitroprusside (NP, a vasodilator) and levosimendan (LEV, an inodilator) treatments on macro and microvascular parameters using the hamster dorsal skinfold chamber preparation. One hour...
Source: Microvascular Research - July 31, 2019 Category: Biochemistry Source Type: research

Nitric Oxide-Based Treatment of Poor-Grade Patients After Severe Aneurysmal Subarachnoid Hemorrhage
ConclusionsEven in comatose/intubated patients, TCD-guided dual-compartment administration of NO donors probably could reverse macrospasm and seems to be feasible. The number of DCI was much lower than expected in this specific subgroup, indicating that this treatment possibly provides a positive impact on outcomes. A randomized trial should verify or falsify our results.
Source: Neurocritical Care - August 14, 2019 Category: Neurology Source Type: research

Urinary sodium and potassium excretion and cerebrovascular health: a multimodal imaging study
ConclusionWe concluded that in hypertensive older males without overt cardiovascular disease, increased sodium intake and reduced potassium intake are associated with impaired subclinical cerebrovascular health.
Source: European Journal of Nutrition - June 19, 2021 Category: Nutrition Source Type: research

Cutaneous Iontophoresis of Vasoactive Medications in Patients with Scleroderma ‐ Associated Pulmonary Arterial Hypertension
ConclusionsPatients with SSc-PAH have a lower cutaneous microvascular response to a prostacyclin analog treprostinil and the sGC activator A-350619 when compared with patients with SSc and no evidence of PH on screening tests, presumably due to a peripheral reduction in prostacyclin receptor expression and nitric oxide bioavailability.
Source: Microcirculation - November 6, 2021 Category: Research Authors: Sami Al Abdi, Allaa Almoushref, Tawfeq Naal, Celia Melillo, Kulwant S. Aulak, Mostafa K. Ahmed, Soumya Chatterjee, Kristin Highland, Raed A. Dweik, Adriano R. Tonelli Tags: ORIGINAL ARTICLE Source Type: research

Cutaneous iontophoresis of vasoactive medications in patients with scleroderma ‐associated pulmonary arterial hypertension
ConclusionsPatients with SSc-PAH have a lower cutaneous microvascular response to a prostacyclin analog treprostinil and the sGC activator A-350619 when compared with patients with SSc and no evidence of PH on screening tests, presumably due to a peripheral reduction in prostacyclin receptor expression and nitric oxide bioavailability.
Source: Microcirculation - November 17, 2021 Category: Research Authors: Sami Al Abdi, Allaa Almoushref, Tawfeq Naal, Celia A. Melillo, Kulwant S. Aulak, Mostafa K. Ahmed, Soumya Chatterjee, Kristin B. Highland, Raed A. Dweik, Adriano R. Tonelli Tags: ORIGINAL ARTICLE Source Type: research

Beneficial Effect of Sodium Nitrite on EEG Ischaemic Markers in Patients with Subarachnoid Haemorrhage
AbstractSubarachnoid haemorrhage (SAH) is associated with long-term disability, serious reduction in quality of life and significant mortality. Early brain injury (EBI) refers to the pathological changes in cerebral metabolism and blood flow that happen in the first few days after ictus and may lead on to delayed cerebral ischaemia (DCI). A disruption of the nitric oxide (NO) pathway is hypothesised as a key mechanism underlying EBI. A decrease in the alpha-delta power ratio (ADR) of the electroencephalogram has been related to cerebral ischaemia. In an experimental medicine study, we tested the hypothesis that intravenous...
Source: Translational Stroke Research - March 14, 2022 Category: Neurology Source Type: research

Lithium upregulates growth-associated protein-43 (GAP-43) and postsynaptic density-95 (PSD-95) in cultured neurons exposed to oxygen-glucose deprivation and improves electrophysiological outcomes in rats subjected to transient focal cerebral ischemia following a long-term recovery period
CONCLUSION: Lithium upregulates BDNF, GAP-43, and PSD-95, which partly accounts for its improvement of neuroplasticity and provision of long-term neuroprotection in the ischemic brain.Abbreviations: BDNF: brain-derived neurotrophic factor; ECM: extracellular matrix; EDTA: ethylenediaminetetraacetic acid; GAP-43: growth-associated protein-43; GSK-3β: glycogen synthase kinase-3β; HBSS: Hank's balanced salt solution; LCBF: local cortical blood perfusion; LDF: laser-Doppler flowmetry; MCAO: middle cerebral artery occlusion; MMP: matrix metalloproteinase; NMDA: N-methyl-D-aspartate; NMDAR: N-methyl-D-aspartate receptor; OCT: ...
Source: Neurological Research - March 29, 2022 Category: Neurology Authors: Shih-Huang Tai Sheng-Yang Huang Liang-Chun Chao Yu-Wen Lin Chien-Chih Huang Tian-Shung Wu Yan-Shen Shan Ai-Hua Lee E-Jian Lee Source Type: research

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