Abstract:
:Our study showed that S-methylisothiourea (SMT) had anti-inflammatory effects in treating herpes simplex encephalitis in mice, and SMT also induced apoptosis of herpes simplex virus (HSV-1)-infected microglial cells. Both animal and cell models were employed in this study. Both models included the following five groups: a normal control group, a virus group (HSV-1 infected), an SMT group (HSV-1-infected + SMT (0.1 mg/10 g)), a dexamethasone group (HSV-1 infected + dexamethasone (2 μg/10 g)), and an APS group (HSV-1-infected + APS (0.8 mg/10 g)). ELISA was used to measure tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-10, and Greiss method was used for measuring nitric oxide (NO) secretion. HE staining was performed for detecting changes in mice brain. Flow cytometry assay for caspase-3, caspase-8, caspase-9, and caspase-12 expressions was also carried out to assess apoptosis. Expressions of TNF-α, IL-1β, and NO were significantly elevated after stimulation of microglial cells with HSV-1. Following SMT intervention, TNF-α, IL-1β, and NO levels were significantly decreased. The inflammatory changes in HSV-1-infected murine brain tissues were also reduced. SMT induction of apoptosis of HSV-stimulated microglia seemed to be through three pathways: the death receptor, mitochondrially gated, and endoplasmic reticulum. SMT can reduce HSV-induced inflammatory insult to the brain. Its mechanism of action is most probably due to the induction of microglial cell apoptosis.
journal_name
Inflammationjournal_title
Inflammationauthors
Guo YJ,Li W,Li XF,Zhao L,Zhang SL,Zhou Y,Dong JH,Mei YWdoi
10.1007/s10753-010-9246-8subject
Has Abstractpub_date
2011-10-01 00:00:00pages
388-401issue
5eissn
0360-3997issn
1573-2576journal_volume
34pub_type
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