Abstract
Department of Biotechnology and Bioengineering, Konkuk University, Seoul 05029, Republic of Korea(Received March 3, 2016; Revised March 16, 2016; Accepted March 16, 2016)ABSTRACT: We investigated 23 lactic acid bacteria isolated from Korean breast milk-fed infant in order to select strains which show superior anti-allergic effect. The candidates were cultivated and then we obtained dried powders of tyndallized cells and supernatant concentrate separately. Screening was carried out with down-regulation of interleukin (IL) 4 and up-regulation of IFN-γ in mouse splenocytes. As a result of the screening, we selected Lactobacillus rhamnosus IDCC 3201 (RH3201) for oral feeding to ovalbumin- sensitized BALB/c mice. Oral administration of RH3201 as dead cell bodies and supernatant concentrate suppressed hyper-production of serum immunoglobulin (Ig) E levels compared to vehicle group. Such anti-allergic effects were achieved by improvement of the balance between cytokines produced from type-1 helper T (Th1) and type-2 helper T (Th2) lymphocytes. Therefore, RH3201 has pote ntial to improve atopic symptoms by immunomodulatory effect.Key words: Lactobacillus rhamnosus IDCC 3201, immunomodulation, tyndallization, immunoglobulin E
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