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Ischemic Stroke ll: Pathophysiology

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

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Updated: Jun 9, 2026

Isolation and Flow Cytometric Analysis of Immune Cells from the Ischemic Mouse Brain

Isolation and Flow Cytometric Analysis of Immune Cells from the Ischemic Mouse Brain

Published on: February 12, 2016

Sex-Specific Immune Responses in Stroke.

Anik Banerjee^1,2, Louise D McCullough¹

¹Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston (A.B., L.D.M.).

|April 25, 2022

Summary

Biological sex and aging significantly impact immune responses in ischemic stroke. Understanding these sex-specific immune differences is crucial for improving patient outcomes after stroke.

Keywords:

brain ischemia central nervous system neuroinflammatory diseases sex characteristics

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Isolation and Flow Cytometric Analysis of Immune Cells from the Ischemic Mouse Brain

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

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Published on: June 20, 2025

Area of Science:

Neuroscience
Immunology
Pathology

Background:

Host immune responses vary due to biological sex and aging, influencing disease outcomes.
Ischemic stroke predominantly affects older individuals, with older women experiencing poorer functional recovery than men.
Sex-based differences in immune responses may alter inflammatory events, impacting post-stroke recovery.

Purpose of the Study:

To provide a comprehensive overview of sex-specific host immune responses in ischemic stroke.
To highlight the role of biological sex and aging in modulating neuroimmune responses to ischemic injury.
To explore how sex differences in immune cells and inflammatory mediators affect stroke outcomes.

Main Methods:

Review of epidemiological studies on sex differences in stroke outcomes.
Analysis of research on sex-specific immune cell populations and their activation in the central nervous system.
Examination of the role of cytokines and chemokines in sex-based neuroinflammatory responses post-stroke.

Main Results:

Older women generally have poorer functional outcomes after ischemic stroke compared to men.
Intrinsic factors like genetics and chromosomal sex influence the neuroimmune response to brain injury.
Ischemic stroke triggers altered intracellular communication and neuroinflammation, involving astrocytes, neurons, and immune cells.

Conclusions:

Sex-specific immune responses are critical determinants of functional outcomes following ischemic stroke.
Aging exacerbates sex differences in stroke recovery by altering immune system dynamics.
Further research into sex-specific immunomodulation holds potential for improved stroke therapies.