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Effect of neonatal immunization with different dosage allergen on the immunity of mice when grown up / 中华耳鼻咽喉头颈外科杂志
Chinese Journal of Otorhinolaryngology Head and Neck Surgery ; (12): 563-567, 2013.
Article in Chinese | WPRIM | ID: wpr-301393
ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of neonatal immunization with different dosage allergen on the immunity of mice when grown.</p><p><b>METHODS</b>Fifty neonatal BALB/c mice were divided into 4 groups randomly and subcutaneous injected with different dosage of ovalbumin (OVA) on day 1, 8 and 15 after born [NS group(10) injected with saline alone; NS + AL group (10) injected with saline and AL(OH)3; small dosage (SD) group (15) injected with 10 microg OVA and AL(OH)3; large dosage (LD) group (15) injected with 1000 microg OVA and AL(OH)3]. The mice were then challenged using caudal vein injection on 5 weeks old (NS group and NS + AL group were challenged with saline, SD group and LD group were challenged with 100 microg OVA). The blood was collected 1 week later to examine OVA specific IgE, IgG1 and IgG2a. Mononuclear cells were drawn from the spleen and cultured. Concentration of IL-4, IFN-r, IL-10 was examined in the cultural supernatant. Flow cytometry was used to test the expression of CD4+ IL-4+, CD4+ IFN-gamma+, CD4 IL-10 cells.</p><p><b>RESULTS</b>It was found that concentration of OVA specific IgE (OVA-sIgE) in SD group (0.33 +/- 0.18) was significantly higher than that of NS (0.07 +/- 0.01) and NS + AL (0.09 +/- 0.04) group (t value was -3.46 and -3.21, all P < 0.01), and LD group (0.17 +/- 0.10) as well (t = 2.58, P < 0.05). The concentration of OVA-sIgE was higher in LD group than that of NS group (t = -2.53, P < 0.05), but similar with that of NS + AL group (t = -2.04, P > 0.05). Both the concentration of OVA-sIgG1 and sIgG2a was higher in SD and LD group than that of NS and NS + AL group (all P < 0.05). The concentration of IL-4, IFN-gamma and IL-10 in the cultural supernatant of spleen mononuclear was all higher in SD group than that of NS and NS + AL group (all P < 0.01). The ratio of IFN-gamma/IL-4 was significantly lower in SD group than that of NS and NS + AL group (t value was 2.14, 3.44, all P < 0.05), while the same ratio was higher in LD group than that of NS and NS + AL group (t value was -2.14, -1.61, all P < 0.05). Ratio of CD4+ IL-4+ cells was significant lower in LD group than that of SD group (P < 0.05), while it was not different with that of NS and NS + AL group (P > 0. 05).</p><p><b>CONCLUSION</b>Neonatal immunization with low dosage OVA could generate a specific immunity with Th2 direction, while with large dosage OVA could generate a specific immunity with Th1 direction.</p>
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Immunoglobulin G / Allergens / CD4-Positive T-Lymphocytes / Ovalbumin / Interleukin-4 / Immunization / Interferon-gamma / Interleukin-10 / Dose-Response Relationship, Drug / Metabolism Limits: Animals Language: Chinese Journal: Chinese Journal of Otorhinolaryngology Head and Neck Surgery Year: 2013 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Immunoglobulin G / Allergens / CD4-Positive T-Lymphocytes / Ovalbumin / Interleukin-4 / Immunization / Interferon-gamma / Interleukin-10 / Dose-Response Relationship, Drug / Metabolism Limits: Animals Language: Chinese Journal: Chinese Journal of Otorhinolaryngology Head and Neck Surgery Year: 2013 Type: Article