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Infection and Immunity, June 2000, p. 3275-3279, Vol. 68, No. 6
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Interaction of Listeria monocytogenes with Human Brain Microvascular Endothelial Cells: an Electron Microscopic Study

Lars Greiffenberg,1 Werner Goebel,1 Kwang Sik Kim,2,3 Justin Daniels,1 and Michael Kuhn1,*

Lehrstuhl für Mikrobiologie, Theodor-Boveri-Institut für Biowissenschaften der Universität Würzburg, Würzburg, Germany,1 and Division of Infectious Diseases, Children's Hospital Los Angeles,2 and Departments of Pediatrics, Molecular Microbiology, and Immunology, USC School of Medicine,3 Los Angeles, California

Received 24 November 1999/Returned for modification 7 February 2000/Accepted 1 March 2000

Internalization of Listeria monocytogenes into human brain microvascular endothelial cells (HBMEC) has recently been demonstrated to be dependent upon the inlB gene. In the present scanning electron microscopic study we show that L. monocytogenes efficiently interacts with the surface of HBMEC in an inlB-independent manner which is also different from invasion. The inlB-dependent invasion of HBMEC by L. monocytogenes is accompanied by intracellular multiplication, movement, and production of bacterium-containing protrusions. These protrusions extend from the cell surface without perturbation of any adjacent cellular membrane.

* Corresponding author. Mailing address: Lehrstuhl für Mikrobiologie, Theodor-Boveri-Institut für Biowissenschaften der Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. Phone: (49)-931-8884421. Fax: (49)-931-8884402. E-mail: kuhn{at}biozentrum.uni-wuerzburg.de.

Infection and Immunity, June 2000, p. 3275-3279, Vol. 68, No. 6
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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