Background: Pharmacological inhibition of aryl hydrocarbon receptor (AhR) activation after ischemia alleviates cerebral ischemia/reperfusion (IR) injury.
Purpose: To investigate whether AhR antagonist administration after reperfusion was also effective in attenuating cerebral IR injury.
Material And Methods: A total of 24 Sprague-Dawley rats were divided into the sham-operated group (no IR), control group (IR), and 6,2',4'-trimethoxyflavone (TMF) group (IR + TMF administration), with 10 rats assigned to each group. Cerebral IR injury was induced by 60 min of middle cerebral artery occlusion followed by reperfusion. TMF (5 mg/kg) was used as the AhR antagonist and was administered intraperitoneally immediately after reperfusion. Cerebral IR injury was observed using magnetic resonance imaging (MRI) and neurobehavioral assessments at baseline, immediately after ischemia, and at 3 days after ischemia.
Results: On MRI, the TMF group showed no significant differences in relative apparent diffusion coefficient (ADC), T2, and fractional anisotropy (FA) values; midline shift value; and infarct volume. In terms of neurobehavioral function, factors such as grip strength, contralateral forelimb use, time to touch, and time to remove adhesive tape from the forepaw, were also not significantly different between the control and TMF groups.
Conclusion: This study demonstrated that AhR treatment after reperfusion had no noticeable effect on reducing cerebral IR injury in rats.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1177/02841851241275278 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cerebral ischemia-reperfusion injury (CIRI) constitutes a significant etiology of exacerbated cerebral tissue damage subsequent to intravenous thrombolysis and endovascular mechanical thrombectomy in patients diagnosed with acute ischemic stroke. The treatment of CIRI has been extensively investigated through a multitude of clinical studies. Acupuncture has been demonstrated to be effective in treating CIRI.
View Article and Find Full Text PDFEffect of Sertraline and Vortioxetine on Stress-Induced Brain Injury in Rats: Biochemical and Histopathological Evaluations.
Clin Neuropharmacol
January 2025
Medical Biochemistry, Erzincan Binali Yıldırım University Faculty of Medicine, Erzincan, Turkey.
Objectives: Our aim was to evaluate the comparative effects of sertraline and vortioxetine against stress-induced brain injury in rats.
Methods: The rats were assigned to a nonstress group (NSG), stress-treated control (StC), sertraline + stress (SSt), and vortioxetine + stress (VSt) groups. Sertraline and vortioxetine (10 mg/kg) were given orally by gavage to the SSt and VSt groups.
Kuanxiong Aerosol Attenuates Ischemic Stroke Injury via Modulation of the TRPV1 Channel.
Chin J Integr Med
January 2025
Department of Ultrasound in Medicine, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China.
Objective: To evaluate the therapeutic effects of Kuanxiong Aerosol (KXA) on ischemic stroke with reperfusion and elucidate the underlying pharmacological mechanisms.
Methods: In vivo pharmacological effects on ischemic stroke with reperfusion was evaluated using the transient middle cerebral artery occlusion (t-MCAO) mice model. To evaluate short-term outcome, 30 mice were randomly divided into vehicle group (n=15) and KXA group (n=15).
Potassium Current Signature of Neuronal/Glial Progenitors in Amniotic Fluid Stem Cells.
Cells
January 2025
Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell'Elce di Sotto 8, 06123 Perugia, Italy.
Article Synopsis
- Amniotic fluid contains stem cells (AF-SCs) that have potential uses in regenerative medicine for treating various injuries and diseases.
- When exposed to basic Fibroblast Growth Factor (bFGF), AF-SCs show the ability to survive and migrate in a rat brain model, resembling characteristics of neuronal/glial progenitor cells.
- The study employs electrophysiological techniques to identify specific potassium currents in AF-SCs and confirms that histamine can influence calcium dynamics and potassium current activation in these cells.
Unravelling Secondary Brain Injury: Insights from a Human-Sized Porcine Model of Acute Subdural Haematoma.
Cells
December 2024
Institute of Anaesthesiologic Pathophysiology and Process Development, University Hospital Ulm, Helmholtzstrasse 8/1, 89081 Ulm, Germany.
Article Synopsis
- Traumatic brain injury (TBI) is a leading cause of death, complicating the development of effective therapies due to the unique nature of each injury.
- Clinical questions regarding the benefits of measuring intracranial pressure, cerebral perfusion pressure, and surgical interventions remain largely unanswered.
- This study focused on acute subdural hematoma in a porcine model to better understand secondary brain injury and the effects of different injury patterns on outcomes, highlighting the need for comprehensive models to improve TBI treatment translation.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!