Acta Neuropathologica

, Volume 96, Issue 5, pp 472–480

Granulocytes in the subarachnoid space of humans and rabbits with bacterial meningitis undergo apoptosis and are eliminated by macrophages

  • R. Nau
  • U. Zettl
  • Joachim Gerber
  • Frank Trostdorf
  • U. Michel
  • Tobias Böttcher
  • Holger Schmidt
  • Silke Adler
  • Wolfgang Brück
Regular paper

DOI: 10.1007/s004010050921

Cite this article as:
Nau, R., Zettl, U., Gerber, J. et al. Acta Neuropathol (1998) 96: 472. doi:10.1007/s004010050921

Abstract

The contribution of leukocyte apoptosis to the resolution of meningeal inflammation in bacterial meningitis was studied in the cerebrospinal fluid (CSF) and in meningeal infiltrates of humans and rabbits by in situ tailing, flow cytometry, agarose gel electrophoresis, and electron microscopy. In humans, the rate of apoptotic granulocytes was 21.0 ± 20.8% (n = 11) in cytocentrifuge preparations and 3.3 ± 3.4 (n = 14) in putride infiltrates of autopsy cases (P = 0.02). In rabbits, CSF pleocytosis peaked 8 h after the initiation of antibiotic treatment (5311 ± 3122/μl). At this time, the rate of apoptotic granulocytes was 15.2 ± 7.3% in CSF and 1.8 ± 1.4% in the meningeal infiltrates (each group n = 6, P = 0.007). Thereafter, the rate of apoptotic granulocytes in CSF declined below 10%. In humans and rabbits, bands representing internucleosomal fragments of approximately 180 base pairs and multiples thereof were documented on agarose gels. Phagocytosis of apoptotic granulocytes by macrophages was visualized by light and electron microscopy. In conclusion, during resolution of subarachnoid space inflammation in bacterial meningitis, a substantial fraction of granulocytes undergoes apoptosis. These granulocytes are removed by phagocytosis by macrophages. Apoptosis is more frequent in granulocytes floating in the CSF than in adherent cells.

Key words Cell deathInflammationLeukocytesCentral nervous systemStreptococcus pneumoniae

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • R. Nau
    • 1
  • U. Zettl
    • 2
  • Joachim Gerber
    • 1
  • Frank Trostdorf
    • 1
  • U. Michel
    • 1
  • Tobias Böttcher
    • 2
  • Holger Schmidt
    • 1
  • Silke Adler
    • 2
  • Wolfgang Brück
    • 3
  1. 1.Department of Neurology, University of Göttingen, Robert-Koch-Strasse 40, D-37075 Göttingen, Germany e-mail: rnau@gwdg.de, Tel.: +49-551-398455 or 396684, Fax: +49-551-398405DE
  2. 2.Department of Neuropathology, University of Göttingen, Göttingen, GermanyDE
  3. 3.Department of Neurology, University of Rostock, Gehlsheimer Strasse 20, D-18055 Rostock, GermanyDE