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Translational Stroke Research

, Volume 4, Issue 5, pp 554–563 | Cite as

Phenotypic Changes in Immune Cell Subsets Reflect Increased Infarct Volume in Male vs. Female Mice

  • Anirban Banerjee
  • Jianming Wang
  • Sheetal Bodhankar
  • Arthur A. Vandenbark
  • Stephanie J. Murphy
  • Halina OffnerEmail author
Original Article

Abstract

Inflammatory responses in the brain after cerebral ischemia have been studied extensively in male mice, but not female mice, thus potentially giving a less-than-accurate view of gender associated pathological processes. In humans, cerebral infarcts are typically smaller in premenopausal females than in age-matched males. In the current study, we confirmed smaller infarcts in female vs. male mice after middle cerebral artery occlusion and 96 h of reperfusion. Moreover, we explored immunological alterations related to this difference and found that the percentage of CD4+ T lymphocytes was significantly higher in spleens in males than females, with increased expression of the activation markers, CD69 and CD44. In contrast, the percentage of CD8+ T lymphocytes was significantly higher in spleens of females than males, leading to the identification of a small but distinct population of IL-10-secreting CD8+CD122+ suppressor T cells that were also increased in females. Finally, we observed that males have a greater percentage of activated macrophages/microglia in the brain than females, as well as increased expression of the VLA-4 adhesion molecule in both brain and spleen. This new information suggesting gender-dependent immunological mechanisms in stroke implies that effective treatments for human stroke may also be gender specific.

Keywords

Experimental stroke Gender bias Immune markers Activated T cells Suppressor T cells Ischemia 

Notes

Acknowledgments

The authors wish to thank Dr. Gil Benedek for the helpful discussions and Melissa Barber for the assistance in submitting the manuscript. This work was supported by NIH grant no. NS076013. This material is based upon work supported in part by the Department of Veterans Affairs, Veterans Health Administration, Office of Research and Development, Biomedical Laboratory Research and Development. The contents do not represent the views of the Department of Veterans Affairs or the United States Government.

Conflict of Interest

Anirban Banerjee declares that he has no conflict of interest.

Jianming Wang declares that he has no conflict of interest.

Sheetal Bodhankar declares that she has no conflict of interest.

Arthur A. Vandenbark declares that he has no conflict of interest.

Stephanie J. Murphy declares that she has no conflict of interest.

Halina Offner declares that she has no conflict of interest.

Compliance with Ethics Requirements

All institutional and national guidelines for the care and use of laboratory animals were followed. This article does not contain any studies with human subjects.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Anirban Banerjee
    • 1
    • 2
  • Jianming Wang
    • 3
  • Sheetal Bodhankar
    • 1
    • 2
  • Arthur A. Vandenbark
    • 1
    • 2
    • 4
  • Stephanie J. Murphy
    • 3
  • Halina Offner
    • 1
    • 2
    • 3
    Email author
  1. 1.Neuroimmunology ResearchPortland Veterans Affairs Medical CenterPortlandUSA
  2. 2.Department of NeurologyOregon Health and Science UniversityPortlandUSA
  3. 3.Department of Anesthesiology and Perioperative MedicineOregon Health and Science UniversityPortlandUSA
  4. 4.Department of Molecular Microbiology and ImmunologyOregon Health and Science UniversityPortlandUSA

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