Tolerance induction and immunological priming initiated by mucosal contacts with protein antigens in inbred strains of mice

We show that mouse strains differ widely in susceptibility to tolerance induction and/or immunization (priming) following contact of protein antigens (ovalbumin, human or bovine gamma globulins) with different mucosal surfaces. 2. When compared to a control group pretreated with saline, mice pretreated by the oral (intragastric) route with antigen became significantly less responsive to subsequent parenteral immunization (i.e., tolerant). This was observed in most, but not all, antigen/strain combinations. 3.Similar, although less prominent changes were induced by pretreatments with antigen by the ocular (conjunctival) route. 4. No significant effects were following pretreatments by the nasal, vaginal, or rectal routes. 5. Genes present in strains selected for multispecific "high" or "low" responsivencess are included among those involved in tolerance induction following mucosal contacts with protein antigens

Genetics of susceptibility to oral tolerance to ovalbumin

Inbred mouse strains vary widely in their susceptibility to the induction of tolerance following oral (intragastric) adminsitation of ovalbumin. Marked differences were found berween strains that form a congenic pair differing at the H-2 complex: C3H/HeJ (H-2K) and C3H.SW(H2b) - which were very susceptible and resitant to tolerance induction, respectively. In comtrast, no significant differences were found betwwwn a/J(H-2a) and A.BY (H-2b) congenics, which were both susceptible, nor among C57BL/10J congenics, which were uniformly resitant to tolerance induction. We conclude that H-2-linked genes determine tolerance susceptibility in conjunction with background genes