Different Cell Types Produce IL-1β and TNF-α After Stroke in Mice
Author Information
Author(s): Bettina H Clausen, Kate L Lambertsen, Alicia A Babcock, Thomas H Holm, Frederik Dagnaes-Hansen, Bente Finsen
Primary Institution: University of Southern Denmark
Hypothesis
Are IL-1β and TNF-α synthesized by overlapping or segregated populations of cells after ischemic stroke in mice?
Conclusion
IL-1β and TNF-α are produced by largely segregated populations of microglia and macrophages after ischemic stroke in mice.
Supporting Evidence
- IL-1β and TNF-α were expressed in largely segregated populations of CD11b+CD45dim microglia and CD11b+CD45high macrophages.
- Very few cells expressed both IL-1β and TNF-α.
- Granulocytes and T cells did not significantly contribute to the expression of IL-1β or TNF-α.
Takeaway
After a stroke in mice, different types of brain cells make different chemicals that can be harmful or helpful. This study shows that two important chemicals, IL-1β and TNF-α, are made by separate groups of cells.
Methodology
Flow cytometry and immunohistochemistry were used to examine cellular co-expression of IL-1β and TNF-α at various time points after stroke in mice.
Limitations
The study primarily focuses on mice, which may not fully represent human stroke responses.
Participant Demographics
Mice used in the study included CD45.1+ and CD45.2+ strains.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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