Abstract:
:After uniocular anterior chamber (AC) inoculation of herpes simplex virus type 1 (HSV-1), virus and TNF alpha (TNF-alpha) are detected in the suprachiasmatic nuclei (SCN). The goal of this study was to investigate the role of TNF-alpha and macrophages in the brain of HSV-1-infected BALB/c mice. Mice were treated with thalidomide for TNF-alpha inhibition or injected with clodronate liposomes to deplete macrophages, and the AC of one eye (ipsilateral) was injected with HSV-1 (KOS). The location of HSV-1, macrophages, and TNF-alpha was determined by fluorescence immunohistochemistry and the titer of virus was determined by plaque assay. Inhibition of TNF-alpha was determined by reverse transcriptase-polymerase chain reaction (RT-PCR) and depletion of macrophages was assessed by flow cytometry. In thalidomide-treated mice, TNF-alpha RNA levels were reduced in the SCN. Both SCN were infected by day 5 post inoculation (p.i.) and the titer of virus in the SCN contralateral to the side of injection was increased. The number of splenic macrophages was significantly reduced in clodronate-treated mice compared with controls. In macrophage-depleted mice, both SCN were infected at day 6 p.i. and the titer of virus in the SCN of these mice was increased at days 6 and 7 p.i. compared with controls. The titer of virus in the contralateral (uninoculated) eye of macrophage-depleted mice was increased at day 7 p.i. Fewer F4/80+ cells were observed in the SCN of macrophage-depleted mice. The results of these studies suggest that TNF-alpha plays a role in limiting virus replication in the SCN of euthymic BALB/c mice and that one source of TNF-alpha is macrophages.
journal_name
J Neuroviroljournal_title
Journal of neurovirologyauthors
Fields M,Zheng M,Zhang M,Atherton SSdoi
10.1080/13550280601039030subject
Has Abstractpub_date
2006-12-01 00:00:00pages
443-55issue
6eissn
1355-0284issn
1538-2443pii
P72637622147130Xjournal_volume
12pub_type
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