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Updated: Apr 26, 2026
Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats
Published on: October 17, 2018
Comparative analysis of H&E and Prussian blue staining in a mouse model of cerebral microbleeds
Shuo Liu1, Mher Mahoney Grigoryan1, Vitaly Vasilevko1
1Department of Anatomy and Neurobiology (SL, MJF), University of California, Irvine, CaliforniaDepartment of Neurology (MMG, RKS, APH, MJF), University of California, Irvine, CaliforniaInstitute for Memory Impairments and Neurological Disorders (VV, DHC), University of California, Irvine, CaliforniaKeck Graduate Institute, School of Pharmacy, Claremont, California (RKS), University of California, Irvine, CaliforniaDepartment of Pathology and Laboratory Medicine (MJF), University of California, Irvine, California.
Abstract:
Cerebral microbleeds are microscopic hemorrhages with deposits of blood products in the brain, which can be visualized with MRI and are implicated in cerebrovascular diseases. Hematoxylin and eosin (H&E) and Perl's Prussian blue are popular staining methods used to localize cerebral microbleeds in pathology. This paper compared these two staining techniques in a mouse model of cerebral microbleeds. We used lipopolysaccharide (LPS) to induce cerebral microhemorrhages. C57B6 mice were treated with LPS (5 mg/kg, i.p.) or vehicle at baseline and at 24 hr. The brains were extracted 48 hr after the first injection and adjacent coronal sections were stained with H&E and Prussian blue to compare the effectiveness of the two staining techniques. H&E-positive stains were increased with LPS treatment and were correlated with grossly visible microhemorrhages on the brain surface; Prussian blue-positive stains, by comparison, showed no significant increase with LPS treatment and did not correlate with either H&E-positive stains or surface microhemorrhages. H&E staining is thus a more reliable indicator of acute bleeding events induced by LPS in this model within a short time span.
Insights
Hematoxylin and eosin (H&E) staining effectively detects acute cerebral microbleeds in mice after lipopolysaccharide (LPS) induction. Prussian blue staining was less reliable for identifying these microscopic hemorrhages in this model.
Area of Science:
- Neurology
- Pathology
- Biomedical Research
Background:
- Cerebral microbleeds are microscopic hemorrhages linked to cerebrovascular diseases.
- Hematoxylin and eosin (H&E) and Perl's Prussian blue are common stains for identifying microbleeds.
- Comparing these staining methods is crucial for accurate pathology assessment.
Purpose of the Study:
- To compare the effectiveness of H&E and Perl's Prussian blue staining for detecting cerebral microbleeds.
- To evaluate H&E and Prussian blue staining in a lipopolysaccharide (LPS)-induced mouse model of microhemorrhage.
Main Methods:
- Cerebral microhemorrhages were induced in C57B6 mice using lipopolysaccharide (LPS).
- Adjacent brain sections were stained with H&E and Perl's Prussian blue.
- Staining results were correlated with gross observations of microhemorrhages.
Main Results:
- LPS treatment significantly increased H&E-positive stains, correlating with visible microhemorrhages.
- Prussian blue staining showed no significant increase with LPS and did not correlate with H&E or surface hemorrhages.
- H&E staining demonstrated higher reliability for detecting acute bleeding events.
Conclusions:
- H&E staining is a more reliable indicator of acute cerebral microbleeds induced by LPS in this mouse model.
- Prussian blue staining may be less sensitive for detecting early-stage or LPS-induced microhemorrhages.
- This study highlights the importance of selecting appropriate staining techniques for neuropathological research.
