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  • Title: The immunoprotective role of interleukin-10 in abnormal pregnancy outcome induced by Toxoplasma gondii infection.
    Author: Zhang R, Zhang H, Liu X, Fu Q, Xu X, Hu X.
    Journal: Gynecol Obstet Invest; 2012; 73(3):223-9. PubMed ID: 22156631.
    Abstract:
    AIMS: To investigate the immunoprotective effect of IL-10 on pregnancy in Toxoplasma gondii-infected C57BL/6 mice. METHODS: Twenty-four pregnant mice were randomly divided into 3 equal groups, i.e. a control group (CG), an infected group (IG) and an infected group treated with IL-10 (IPTG). Each IPTG and IG mouse was infected with 400 T. gondii trophozoites on gestational day (GD) 8. Each IPTG mouse was injected with 1 μg recombinant mouse IL-10 via a tail vein on GD 10 and 12. The mice were sacrificed on day 7 postinfection. Qa-1 and NKG2A were analyzed in the placenta by flow cytometry and real-time PCR. IL-4, IL-10 and IFN-γ in the placenta supernatant were analyzed by ELISA. Statistical analysis was performed by one-way ANOVA. RESULTS: IPTG mice showed a better mental state, had larger fetuses and placentas with a better blood supply and a lower resorption ratio compared to IG mice. NKG2A and Qa-1 were significantly increased in IPTG mice compared to IG mice (p < 0.05). IL-4 and IL-10 in IPTG placenta supernatant were increased (p < 0.05), but IFN-γ was decreased (p < 0.05) compared to IG placenta supernatant. The ratios of IFN-γ/IL-4 and IFN-γ/IL-10 were decreased in IPTG mice compared to IG mice (p < 0.05, p < 0.05). CONCLUSION: IL-10 plays an immunoprotective role and improves the pregnancy outcome of T. gondii-infected mice.
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