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  • Title: Effects of soybean glycinin on performance and immune function in early weaned pigs.
    Author: Sun P, Li D, Dong B, Qiao S, Ma X.
    Journal: Arch Anim Nutr; 2008 Aug; 62(4):313-21. PubMed ID: 18763625.
    Abstract:
    Glycinin, a major storage protein in soybean, has been identified as an important food allergen. The present study was conducted to investigate the effects of soybean glycinin on the local and systemic immune responses using a swine model specific for glycinin allergy. Performance, peripheral blood lymphocyte proliferation and CD4+ and CD8+ subsets in the plasma of naive and sensitised piglets were determined. In addition, the concentrations of IgA, IgG, IgM, interleukin-4 and interleukin-6 in the jejunum mucosa were measured. Our results showed that dietary supplementation of glycinin reduced piglet performance (p < 0.05), while increasing lymphocyte proliferation and CD4+/ CD8+ ratio (p < 0.01). Intestinal mucosal immune responses to glycinin were enhanced with high levels of IgA (p < 0.01) as well as interleukin-4 and interleukin-6 in the jejunum mucosa in glycinin-treated piglets compared with the control (p < 0.01). There were no differences due to treatment in the densities of IgG and IgM. In conclusion, it was found that glycinin stimulated local and systemic immune responses in allergic piglets and had negative effects on piglet performance. The severity of the immune reactions depends on the dose of glycinin with higher doses causing more severe symptoms.
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