RESUMO
Objective:To investigate the immunoregulation effect of ovalbumin immune tolerance factors (OVA ITFs).Methods:Components that were smaller than 3 kD were isolated from the splenic lymphocytes lysates of OVA tolerance mice or naive mice,respectively,named as OVA ITFs or OVA ITFs conttrol.Naive BALB/c mice were divided into 5 groups,group A,B,C,D were injected i.v.by OVA ITFs,OVA ITFs control,splenic lymphocytes from OVA tolerant mice or PBS,respectively,group E as the blank control.The percentages of CD4+CD25+ T cell subpopulation from spleens before and after adoptive transfer were measured with flow cytometer;OVA specific lymphocyte responses were assessed by MTT assay.The levels of IL-10 and TGF-?1 in the culture supernatants were tested by ELISA kits.Results:For OVA ITFs or splenic lymphocytes from OVA tolerant mice,the percentages of CD4+CD25+ T cell subpopulation from spleens after adoptive transfer were raised significantly compared with that before adoptive transfer (15.32%?1.03% and 15.35%?0.62% vs 9.97%?1.38%,P