Related Experiment Video

Updated: May 21, 2026

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model
08:22

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model

Published on: June 20, 2025

Mild hypothermia inhibits the inflammatory response and microglial M1 polarization in ischemic stroke via the

Ganghua Feng1, Yabin Hu2, Qiuli Li1

  • 1Department of Neurology, Chenzhou First People's Hospital, Chenzhou, 424499, China.

Metabolic Brain Disease
|May 20, 2026
PubMed
Abstract

Insights

Mild hypothermia (MH) reduces brain damage after ischemic stroke by suppressing neuroinflammation. This neuroprotection is mediated by the EFNB2/EphB4 signaling pathway, highlighting a novel therapeutic target.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biochemistry

Background:

  • Mild hypothermia (MH) shows potential in mitigating cerebral damage and neurofunctional deficits following ischemic stroke.
  • The precise molecular mechanisms underlying MH's neuroprotective effects in ischemic stroke remain largely unexplored.
  • This research aims to elucidate the regulatory mechanisms of MH in stroke-related brain injury.

Purpose of the Study:

  • To investigate the neuroprotective mechanisms of mild hypothermia (MH) in ischemic stroke.
  • To explore the role of the EFNB2/EphB4 signaling pathway in MH-mediated neuroprotection.
  • To assess the impact of MH on neuroinflammation and microglial polarization.

Main Methods:

  • Established a middle cerebral artery occlusion (MCAO) mouse model and an LPS-induced microglial cell model.
  • Administered EphB4 kinase inhibitor NVP-BHG712 and assessed brain damage (TTC staining, infarct volume, edema).
  • Evaluated neurological function (rotarod, grip, EBST, deficit scores), microglial polarization (immunofluorescence), and gene/protein expression (qRT-PCR, Western blotting).

Main Results:

  • MH significantly reduced infarct volume, improved neuromotor function, and decreased cerebral edema in MCAO mice.
  • MH suppressed neuroinflammation by reducing M1 microglial polarization and pro-inflammatory cytokine release (IL-1β, IL-18).
  • MH upregulated the EFNB2/EphB4 signaling pathway, and its inhibition abrogated MH's anti-inflammatory and neuroprotective effects.

Conclusions:

  • Mild hypothermia exerts neuroprotective effects in ischemic stroke.
  • The EFNB2/EphB4 signaling pathway is a key mediator of MH's anti-inflammatory and neuroprotective actions.
  • MH attenuates post-ischemic neuroinflammation and ameliorates secondary brain injury via this pathway.
Keywords:
EFNB2/EphB4 pathwayInflammationIschemic strokeMicroglial M1 polarizationMild hypothermia

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