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Journal of Virology, September 2003, p. 9533-9541, Vol. 77, No. 17
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.17.9533-9541.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Latent Herpes Simplex Virus Infection of Sensory Neurons Alters Neuronal Gene Expression

Martha F. Kramer,1,2 W. James Cook,3,{dagger} Frederick P. Roth,1 Jia Zhu,2 Holly Holman,2 David M. Knipe,2* and Donald M. Coen1*

Departments of Biological Chemistry and Molecular Pharmacology,1 Microbiology and Molecular Genetics, Harvard Medical School, Boston,2 Millennium Pharmaceuticals, Cambridge, Massachusetts3

Received 17 March 2003/ Accepted 3 June 2003

The persistence of herpes simplex virus (HSV) and the diseases that it causes in the human population can be attributed to the maintenance of a latent infection within neurons in sensory ganglia. Little is known about the effects of latent infection on the host neuron. We have addressed the question of whether latent HSV infection affects neuronal gene expression by using microarray transcript profiling of host gene expression in ganglia from latently infected versus mock-infected mouse trigeminal ganglia. 33P-labeled cDNA probes from pooled ganglia harvested at 30 days postinfection or post-mock infection were hybridized to nylon arrays printed with 2,556 mouse genes. Signal intensities were acquired by phosphorimager. Mean intensities (n = 4 replicates in each of three independent experiments) of signals from mock-infected versus latently infected ganglia were compared by using a variant of Student's t test. We identified significant changes in the expression of mouse neuronal genes, including several with roles in gene expression, such as the Clk2 gene, and neurotransmission, such as genes encoding potassium voltage-gated channels and a muscarinic acetylcholine receptor. We confirmed the neuronal localization of some of these transcripts by using in situ hybridization. To validate the microarray results, we performed real-time reverse transcriptase PCR analyses for a selection of the genes. These studies demonstrate that latent HSV infection can alter neuronal gene expression and might provide a new mechanism for how persistent viral infection can cause chronic disease.

* Corresponding author. Mailing address for Donald M. Coen: Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 250 Longwood Ave., Boston, MA 02115. Phone: (617) 432-1691. Fax: (617) 432-3833. E-mail: don_coen{at}hms.harvard.edu. Mailing address for David M. Knipe: Department of Microbiology and Molecular Genetics, Harvard Medical School, 200 Longwood Ave., Boston, MA 02115. Phone: (617) 432-1934. Fax: (617) 432-0223. E-mail: david_knipe{at}hms.harvard.edu.

{dagger} Present address: Glycofi, Inc., Lebanon, N.H.

Journal of Virology, September 2003, p. 9533-9541, Vol. 77, No. 17
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.17.9533-9541.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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