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Purpose. This study investigated the relationship between serum immunoglobulin A (IgA) concentration and epileptic seizures in children. Methods. Pediatric patients with epilepsy were included in this cross-sectional investigation. Serum IgA levels were analyzed using a biochemical analyzer during admission for initial diagnosis before any medical treatment was administered. Results. Among the 94 patients, 19.1% had decreased serum IgA levels, with a median value of 0.57 g/L. No significant relationship existed between serum IgA concentration and gender, age, epilepsy type, seizure duration or epilepsy waves. Children with low IgA levels experienced more spastic episodes and had a higher seizure frequency compared to those without decreased IgA levels. Changes in serum IgA levels were significantly associated with seizure frequency after three months of treatment. Initially, the occurrence of seizures in the low IgA group was 10.5 times lower than in the non-low IgA group, but, after three months, the low IgA group had a significantly higher seizure rate (72.2%) compared to the non-low IgA group (19.7%). After six months, the low IgA group had a higher proportion of children without seizures (100% versus 84.8%), although the difference was not statistically significant. Conclusion. Serum IgA concentration plays a crucial role in diagnosing and predicting outcomes for pediatric epilepsy.

Throughout infancy, IgA is crucial for maintaining gut mucosal immunity. This study aims to determine whether supplementing newborn mice with eight different strains of Bifidobacterium longum subsp. infantis might regulate their IgA levels. The strains were gavaged to BALB/C female (n = 8) and male (n = 8) dams at 1–3 weeks old. Eight strains of B. longum subsp. infantis had strain-specific effects in the regulation of intestinal mucosal barriers. B6MNI, I4MI, and I10TI can increase the colonic IgA level in females and males. I8TI can increase the colonic IgA level in males. B6MNI was also able to significantly increase the colonic sIgA level in females. B6MNI, I4MI, I8TI, and I10TI regulated colonic and Peyer's patch IgA synthesis genes but had no significant effect on IgA synthesis pathway genes in the jejunum and ileum. Moreover, the variety of sIgA-coated bacteria in male mice was changed by I4MI, I5TI, I8TI, and B6MNI. These strains also can decrease the relative abundance of Escherichia coli. These results indicate that B. longum subsp. infantis can promote IgA levels but show strain specificity. Different dietary habits with different strains of Bifidobacterium may have varying effects on IgA levels when supplemented in early infancy. [ABSTRACT FROM AUTHOR]

Throughout infancy, IgA is crucial for maintaining gut mucosal immunity. This study aims to determine whether supplementing newborn mice with eight different strains of Bifidobacterium longum subsp. infantis might regulate their IgA levels. The strains were gavaged to BALB/C female (n = 8) and male (n = 8) dams at 1–3 weeks old. Eight strains of B. longum subsp. infantis had strain-specific effects in the regulation of intestinal mucosal barriers. B6MNI, I4MI, and I10TI can increase the colonic IgA level in females and males. I8TI can increase the colonic IgA level in males. B6MNI was also able to significantly increase the colonic sIgA level in females. B6MNI, I4MI, I8TI, and I10TI regulated colonic and Peyer’s patch IgA synthesis genes but had no significant effect on IgA synthesis pathway genes in the jejunum and ileum. Moreover, the variety of sIgA-coated bacteria in male mice was changed by I4MI, I5TI, I8TI, and B6MNI. These strains also can decrease the relative abundance of Escherichia coli. These results indicate that B. longum subsp. infantis can promote IgA levels but show strain specificity. Different dietary habits with different strains of Bifidobacterium may have varying effects on IgA levels when supplemented in early infancy.