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Total 498 results found since Jan 2013.

The neuroprotective effects of Insulin-Like Growth Factor 1 via the Hippo/YAP signaling pathway are mediated by the PI3K/AKT cascade following cerebral ischemia/reperfusion injury
Brain Res Bull. 2021 Oct 27:S0361-9230(21)00309-9. doi: 10.1016/j.brainresbull.2021.10.017. Online ahead of print.ABSTRACTInsulin-like growth factor 1 (IGF-1) has neuroprotective actions, including vasodilatory, anti-inflammatory, and antithrombotic effects, following ischemic stroke. However, the molecular mechanisms underlying the neuroprotective effects of IGF-1 following ischemic stroke remain unknown. Therefore, in the present study, we investigated whether IGF-1 exerted its neuroprotective effects by regulating the Hippo/YAP signaling pathway, potentially via activation of the PI3K/AKT cascade, following ischemic str...
Source: Brain Research Bulletin - October 31, 2021 Category: Neurology Authors: Pian Gong Yichun Zou Wei Zhang Qi Tian Shoumeng Han Zhou Xu Qianxue Chen Xin Wang Mingchang Li Source Type: research

The Ca2+-gated channel TMEM16A amplifies capillary pericyte contraction and reduces cerebral blood flow after ischemia
Pericyte-mediated capillary constriction decreases cerebral blood flow in stroke after an occluded artery is unblocked. The determinants of pericyte tone are poorly understood. We show that a small rise in cytoplasmic Ca2+ concentration ([Ca2+]i) in pericytes activated chloride efflux through the Ca2+-gated anion channel TMEM16A, thus depolarizing the cell and opening voltage-gated calcium channels. This mechanism strongly amplified the pericyte [Ca2+]i rise and capillary constriction evoked by contractile agonists and ischemia. In a rodent stroke model, TMEM16A inhibition slowed the ischemia-evoked pericyte [Ca2+]i rise, ...
Source: Journal of Clinical Investigation - May 2, 2022 Category: Biomedical Science Authors: Nils Korte, Zeki Ilkan, Claire L. Pearson, Thomas Pfeiffer, Prabhav Singhal, Jason R. Rock, Huma Sethi, Dipender Gill, David Attwell, Paolo Tammaro Source Type: research

Overexpression of Circ_0005585 Alleviates Cerebral Ischemia Reperfusion Injury via Targeting MiR-16-5p
Circular RNAs are implicated in the pathogenesis of ischemic stroke. In this work, we explored the modulation and potential mechanisms of action of circ_0005585 in ischemic stroke. Expression of circ_0005585 and miR-16-5p was assessed by quantitative real-time reverse transcription PCR. Ischemic stroke was modeled in mice by middle cerebral artery occlusion (MCAO). The infarct volume was assessed by triphenyl tetrazolium chloride staining. Neurological deficits were evaluated according to Neurological Severity Score. The permeability of the blood —brain barrier was assessed by Evan’s blue leakage and brain water conten...
Source: Bulletin of Experimental Biology and Medicine - August 11, 2023 Category: Biology Source Type: research

Dihydromyricetin Alleviates Ischemic Brain Injury by Antagonizing Pyroptosis in Rats
AbstractIschemic stroke is a worldwide disease that seriously threatens human health, and there are few effective drugs to treat it. Dihydromyricetin (DHM) has anti-inflammatory, antioxidant, and antiapoptotic functions. We identified pyroptosis following ischemic stroke. Here, we investigated the effect of DHM on ischemic stroke and pyroptosis. In the first part of the experiment, Sprague-Dawley rats were randomly divided into the sham group and MCAO group. The MCAO model was established by occlusion of the middle cerebral artery for 90  min using a silica gel suture. The ischemic penumbra was used for mRNA sequencing 1Â...
Source: Neurotherapeutics - August 21, 2023 Category: Neurology Source Type: research

Rhein attenuates cerebral ischemia-reperfusion injury via inhibition of ferroptosis through NRF2/SLC7A11/GPX4 pathway
CONCLUSION: Rhein attenuates cerebral I/R injury by inhibiting ferroptosis via the NRF2/SLC7A11/GPX4 axis, highlighting its potential as a therapeutic agent for ischemic stroke.PMID:37714424 | DOI:10.1016/j.expneurol.2023.114541
Source: Experimental Neurology - September 15, 2023 Category: Neurology Authors: Hua Liu Tian-Ai Zhang Wen-Yue Zhang Si-Rui Huang Yue Hu Jia Sun Source Type: research

Inhibition of Nkcc1 promotes axonal growth and motor recovery in ischemic rats
In conclusion, bumetanide promoted post-stroke axonal sprouting together accompanied by an improved behavioral outcome possibly through restoring and maintaining neuronal chloride homeostasis and creating a recovery-promoting microenvironment by overcoming the axonal growth inhibition encountered after cerebral ischemia in rats.
Source: Neuroscience - October 18, 2017 Category: Neuroscience Source Type: research

Interleukin-33 Protects Ischemic Brain Injury by Regulating Specific Microglial Activities
Publication date: 10 August 2018 Source:Neuroscience, Volume 385 Author(s): Qianping Luo, Yong Fan, Lili Lin, Jingjing Wei, Zuanfang Li, Yongkun Li, Susumu Nakae, Wei Lin, Qi Chen Interleukin-33 (IL-33), a novel member of the IL-1 family, expressed in many tissue and cell types, is involved in inflammation and immune functions. Previous studies suggest that IL-33 may play a role in ischemic stroke. Here, we evaluated the effect of IL-33 in cerebral ischemia–reperfusion-induced injury and investigated its underlying mechanism. Our data indicated that IL-33 deficiency exacerbated the neurological dysfunction caused by cer...
Source: Neuroscience - June 22, 2018 Category: Neuroscience Source Type: research

cPKC γ alleviates ischemic injury through modulating synapsin Ia/b phosphorylation in neurons of mice.
cPKCγ alleviates ischemic injury through modulating synapsin Ia/b phosphorylation in neurons of mice. Brain Res Bull. 2018 Jul 14;: Authors: Zhang N, Zhu H, Han S, Sui L, Li J Abstract Conventional protein kinase C (cPKC)γ and synapsin Ia/b have been implicated in the development of ischemic stroke, but their relationships and functions are unclear. In the present study, the oxygen-glucose deprivation (OGD)-induced ischemic insult in primary cultured cortical neurons in vitro and middle cerebral artery occlusion (MCAO)-induced ischemic stroke model in vivo were used to elucidate the function of cPKC...
Source: Brain Research Bulletin - July 14, 2018 Category: Neurology Authors: Zhang N, Zhu H, Han S, Sui L, Li J Tags: Brain Res Bull Source Type: research

Blood Cell-Bound C4d as a Marker of Complement Activation in Patients With the Antiphospholipid Syndrome
In conclusion the detection of complement activation products on circulating erythrocytes and platelets using a highly sensitive and specific assay further supports the view that APS is a complement-mediated disorder. Increased EC4d and PC4d percentages are associated with the active inflammatory disease in SLE. It is difficult to translate this finding to APS which is a non-acute inflammatory disorder. We failed to find an association with both the classification and non-classification criteria, including thrombocytopenia. However, we believe that this sensitive tool to evaluate complement activation may offer more inform...
Source: Frontiers in Immunology - April 11, 2019 Category: Allergy & Immunology Source Type: research