Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-1860
Fritschy, J M; Brandner, S; Aguzzi, A; Koedood, M; Luscher, B; Mitchell, P J (1996). Brain cell type specificity and gliosis-induced activation of the human cytomegalovirus immediate-early promoter in transgenic mice. Journal of Neuroscience, 16(7):2275-2282.
Human cytomegalovirus (HCMV) can cause debilitating, sometimes fatal, opportunistic infections in congenitally infected infants and in immunodeficient individuals such as patients with the acquired immunodeficiency syndrome (AIDS). Molecular mechanisms that determine cell type specificity of HCMV infection and latency are poorly understood. We recently described a transgenic mouse model for analysis of HCMV major immediate-early (IE) promoter regulation and showed that sites of IE promoter activity during murine embryogenesis correlate with known target tissues of congenital HCMV infection in human fetuses (Koedood et al., 1995). Among various permissive human tissues, the brain is a site where HCMV infections can be devastating. Here, we have used immunohistochemical double-labeling analysis to identify specific cell types with HCMV-IE promoter activity in brains of transgenic mice at several postnatal stages. IE promoter activity was restricted to some endothelial cells, ependymal cells, choroid plexus epithelia, and neurons at discrete locations in the forebrain, brainstem, and cerebellum. Endothelial cells and neurons with activity were proportionately more abundant in neonatal than in adult brains. Although the IE promoter was normally silent in most astrocytes, activity was strongly induced in reactive astrocytes in response to a neocortical stab lesion. The findings support a model, consistent with clinical literature on HCMV encephalitis, whereby tissue damage and gliosis caused by HCMV infection of endothelial and ependymal cells progressively renders adjacent permissive neurons and reactive astrocytes accessible to infection. This transgenic model system should facilitate identification of factors that regulate the HCMV IE promoter with regard to infection permissivity and reactivation from latency.
108 downloads since deposited on 11 Feb 2008
70 downloads since 12 months
|Item Type:||Journal Article, refereed|
|Communities & Collections:||04 Faculty of Medicine > University Hospital Zurich > Institute of Neuropathology|
|Dewey Decimal Classification:||570 Life sciences; biology
610 Medicine & health
|Date:||1 April 1996|
|Deposited On:||11 Feb 2008 12:26|
|Last Modified:||29 Nov 2013 18:15|
|Publisher:||Society for Neuroscience|
Users (please log in): suggest update or correction for this item
Repository Staff Only: item control page