miR ‑29a ameliorates ischemic injury of astrocytes in vitro by targeting the water channel protein aquaporin 4.

miR‑29a ameliorates ischemic injury of astrocytes in vitro by targeting the water channel protein aquaporin 4. Oncol Rep. 2019 Jan 09;: Authors: Zheng Y, Pan C, Chen M, Pei A, Xie L, Zhu S Abstract Ischemic stroke is the main cause of brain injury and results in a high rate of morbidity, disability and mortality. In the present study, we aimed to determine whether miR‑29a played a protective role in oxygen glucose deprivation (OGD) injury via regulation of the water channel protein aquaporin 4 (AQP4). Real‑time PCR and western blotting were used to assess miR‑29a levels and AQP4 protein levels, respectively. Apoptosis was detected by flow cytometry, and lactate dehydrogenase (LDH) was determined by enzyme‑linked immunosorbent assay (ELISA). Overexpression of miR‑29a was significantly downregulated in OGD‑induced primary astrocytes, and transfection with a miR‑29a mimic decreased LDH release and apoptosis, and improved cell health in OGD‑induced astrocytes. AQP4 was the target of miR‑29a, which suppressed AQP4 expression, and knockdown of AQP4 mitigated OGD‑induced astrocyte injury. Furthermore, miR‑29a regulated AQP4 expression in OGD‑induced astrocytes. AQP4 exacerbated astrocyte injury following ischemic stroke, and knockdown of AQP4 protected OGD/RX‑induced primary cultured astrocytes against injury. The effect of miR‑29a inhibitor on primary astrocytes was lost following AQP4 knockdown. These findings indicated that miR...
Source: Oncology Reports - Category: Cancer & Oncology Tags: Oncol Rep Source Type: research

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Conclusions: The differences in outcome predictability by FIM score between AC and PC strokes should be considered, although FIM scores at discharge from stroke unit were useful to predict a favorable outcome.Eur Neurol 2018;80:313 –320
Source: European Neurology - Category: Neurology Source Type: research
Stroke leads to devastating impact on health as well as quality of life making it one of the leading causes of disability. Restoring the functions of upper extremities after ischemic (ISC) stroke is one of the challenges for rehabilitation. Lack of trained professionals and accessibility to rehabilitation centers are limited in many counties. Constraint induced movement therapy (CIMT) has been practiced in regaining the functional activity following stroke. CIMT can be practiced with minimum clinical set up which makes it cost effective.
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Source Type: research
Abstract In the United States, stroke ranks fifth among all causes of death and is the leading cause of serious long-term disability. The 2018 American Heart Association stroke care guidelines consider endovascular thrombectomy to be the standard of care for patients who have acute ischemic stroke in the anterior circulation when arterial puncture can be made within 6 hours of symptom onset or within 6-24 hours of symptom onset when specific eligibility criteria are satisfied. The aim of this 2-part review is to provide practical perspective on the clinical literature regarding anesthesia care of patients treated ...
Source: Anesthesia and Analgesia - Category: Anesthesiology Authors: Tags: Anesth Analg Source Type: research
Ischemic stroke is a predominant cause of disability worldwide, with thrombolytic or mechanical removal of the occlusion being the only therapeutic option. Reperfusion bears the risk of an acute deleterious calcium-dependent breakdown of the blood-brain barrier. Its mechanism, however, is unknown. Here, we identified type 5 NADPH oxidase (NOX5), a calcium-activated, ROS-forming enzyme, as the missing link. Using a humanized knockin (KI) mouse model and in vitro organotypic cultures, we found that reoxygenation or calcium overload increased brain ROS levels in a NOX5-dependent manner. In vivo, postischemic ROS formation, in...
Source: Journal of Clinical Investigation - Category: Biomedical Science Authors: Source Type: research
Publication date: Available online 16 March 2019Source: Stem Cell ResearchAuthor(s): M. Barzegar, G. Kaur, F.N.E. Gavins, Y. Wang, C. Boyer, J.S. AlexanderAbstractIschemia-reperfusion injury (I/RI), produced by an initial interruption of organ blood flow and its subsequent restoration, contributes significantly to the pathophysiologies of stroke, myocardial infarction, renal I/RI, intestinal I/RI and liver I/RI, which are major causes of disability (including transplant failure) and even mortality. While the restoration of blood flow is required to restore oxygen and nutrient requirements, reperfusion often triggers local ...
Source: Stem Cell Research - Category: Stem Cells Source Type: research
The incidence of stroke in children is 2.4 per 100,000 person-years and results in long-term motor and cognitive disability. In ischemic stroke, white matter (WM) is frequently injured, but is relatively understudied compared to grey matter injury. Previous research suggests that the cellular response to WM ischemic injury is different at different ages. Little is known about whether WM repair mechanisms differ in children and adults. We utilized a model of focal ischemic WM injury to determine the oligodendrocyte (OL) response to focal WM ischemic injury in juvenile and adult mice.Methods: Juvenile (21 –25 days of a...
Source: Developmental Neuroscience - Category: Neuroscience Source Type: research
We report estimates and corresponding uncertainty intervals (UIs), from 1990 to 2016, for incidence, prevalence, deaths, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs). DALYs were generated by summing YLLs and YLDs. Cause-specific mortality was estimated using an ensemble modelling process with vital registration and verbal autopsy data as inputs. Non-fatal estimates were generated using Bayesian meta-regression incorporating data from registries, scientific literature, administrative records, and surveys. The Socio-demographic Index (SDI), a summary indicator gene...
Source: The Lancet Neurology - Category: Neurology Source Type: research
Abstract Ischemic stroke is one of the leading causes of severe disability and death. In clinical settings, tissue plasminogen activator (t-PA) for thrombolytic therapy is the only globally approved drug for the treatment of ischemic stroke. However, the proportion of patients who receive t-PA therapy is extremely limited due to its narrow therapeutic time window (TTW) and the risk of cerebral hemorrhage. Cerebral ischemia-reperfusion (I/R) injury is also a serious problem for patients' outcomes. Hence, the development of more effective therapies has been desired to prolong the TTW of t-PA and prevent cerebral I/R...
Source: Biological and Pharmaceutical Bulletin - Category: Drugs & Pharmacology Authors: Tags: Biol Pharm Bull Source Type: research
AbstractIschemic stroke is a leading cause of death and disability throughout the world and is both preventable and treatable. This review focuses on the treatment of the most severe form of ischemic stroke, namely large-vessel ischemic stroke, using endovascular techniques. Such therapies were proven effective in 2015. These therapies are among the most beneficial surgical therapies ever subjected to randomized clinical trials. Recent research has explored treating patients up to 24  h following the onset of stroke using advanced imaging techniques to select patients with brain tissue still at risk. These new finding...
Source: Neurotherapeutics - Category: Neurology Source Type: research
In conclusion, we demonstrated that montelukast improves fiber re-organization and long-term functional recovery after brain ischemia, enhancing recruitment and maturation of OPCs. The present data suggest that montelukast, an already approved drug, could be “repositioned “as a protective drug in stroke acting also on fiber re-organization.Graphical abstract
Source: Pharmacological Research - Category: Drugs & Pharmacology Source Type: research
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