임실지역 젖소 초유로부터 분리한 TGF-β 함유 유청 단백질의 면역활성

This experiment was carried out in order to separate bovine colostral whey protein from Imsil province and to test the effect of immunological activity on RAW 264.7 cells. The colostral whey protein contained TGF-b 7, 475pg/g in total. We first tested the effect of the colostral whey protein on the proliferation of RAW 264.7 cells and it demonstrated cytotoxicity at concentrations greater than 20mg/mL. Therefore, the immunological activities of colostral whey protein were investigated in maximum concentration of 10mg/mL on LPS-induced RAW 264.7 cells. Results indicated that colostral whey protein inhibited the LPS-induced nitric oxide (NO) production in a dose-dependent manner. The colostral whey protein also suppressed the productions of proinflammatory cytokines (TNF-a, IL-1b, IL-6) in a dose-dependent manner. In addition to the immunological activity, colostral whey protein led to the expression of heme oxygenase-1 (HO-1) in RAW 264.7 cells. In conclusion, colostral whey protein containing TGF-b inhibited the production of NO, TNF-a, IL-1b, and IL-6 via expression of HO-1.