Bernard Roizman, Sc.D.


  • Joseph Regenstein Distinguished Service Professor Emeritus, Department of Microbiology, Department of Molecular Genetics and Cell Biology, Department of Biochemistry and Molecular Biology
  • Professor Emeritus, The Cancer Research Center
  • Professor Emeritus, Committees on Genetics and Microbiology


Sc.D., Johns Hopkins, 1956


The University of Chicago
920 East 58th Street
Chicago, Illinois 60637

Phone:  (773) 702-9679

Herpes Simplex Virus Genome Structure, Gene Expression, Viral Latency


Herpes simplex viruses cause two kinds of infections. On initial infection at the portal of entry into the body, the virus replicates and kills the infected cell (lytic infection). In the course of its replication, the virus infects nerve endings and is transported retrograde to neuronal nuclei of peripheral ganglia where it remains latent (silent) and does not harm the neuron. In some individuals the virus periodically reactivates, is transported anterograde to a site near the portal of entry where it can cause recurrent lesions.

The focus of the research conducted in this laboratory is on the mechanism by which herpes simplex virus with less than 100 genes takes over a human cell with more than 20,000 genes in both lytic and latent infection.

Current studies on lytic infection indicate that both the virus and the cell have evolved a large number of functions designed to thwart each other’s efforts. The cell attempts to silence viral DNA and preclude the expression of its genes. The virus has evolved a large number of functional domains in its proteins that are designed to silence the cell and prevent it from shutting down the virus. In the course of these studies we have identified both the mechanisms by which the cell attempts to shut down the virus and virus-encoded functions that instead silence the cell and block the activation of cellular innate immune responses.

The exciting results of the studies on latent infection are two-fold: in peripheral neurons the virus allows itself to be silenced by host repressors.  At the same time it has evolved the machinery that enables it to reactivate when the neuron harboring the latent virus is stressed by external stimuli such as fever, UV light or emotional/hormonal stress.

The laboratory has trained approximately 50 graduate students and approximately the same number of post-doctoral fellows. The majority of the trainees are in Universities engaged in research and teaching.

Research Papers in PubMed