Characteristics and Mechanisms of Isolated Rubella Virus, Strain JR23: Infection of the Central Nervous System of BALB/c Mice
Objective: To investigate the correlation between rubella virus (RuV) antigen in peripheral lymphocytes, the immune status and RuV infection in the central nervous system (CNS). Methods: BALB/c mice were used as a model and treated with immunoaffecting medicines. Then, the mice were infected with RuV via the abdominal cavity, and the antigen level in peripheral lymphocytes was examined 1, 3, 7 and 14 days postinfection. RuV in the CNS was detected by immunohistochemical methods. BALB/c mice were given dexamethasone and cytoxan before infection with the RuV JR23 strain. Immune functions and RuV invasion of the CNS were assayed on day 21 postinfection via the abdominal cavity, and their relationship was analyzed. Results: The mean antigen detection rates at different times were 3.1, 4.1, 9.6 and 2.4%, respectively, in the dexamethasone group, and 14.2, 12.7, 9.9 and 3.1%, respectively, in the cytoxan group. In the group without any intervention, the detection rates were 4.63, 10.25, 6.88 and 1.75%, respectively. The antigen detection rates in peripheral lymphocytes among the three groups 24 h postinfection were significantly different (F = 0.0317, p Conclusion: Cytoxan can affect virus detection rates in peripheral lymphocytes. At the early phase of infection, the persistent presence of RuV in peripheral lymphocytes increases the incidence of CNS infection. RuV infection in the CNS was related to the cell immune situation before specific antibody was produced in the body.
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