As a T cell-dependent phenomenon, oral tolerance is not expected to depend necessarily on native configuration of antigens. We investigated the induction of oral tolerance with modified ovalbumin (Ova). Oral administration of heat-denatured (HD-Ova) and cyanogen bromide-degraded ovalbumin was less effective than native Ova in inducing oral tolerance in B6D2F1 mice. HD-Ova was effective in suppr...

background:  a great number of premature neonates do not tolerate sufficient milk during the early neonatal period.   objective: to evaluate the effect of oral erythromycin on enhancement of feeding tolerance in preterm newborns.   methods: sixty preterm neonates intolerant to milk of >75 ml/kg/day during 5 days after the start of feedings, were randomized into a treatment and a control groups....

Impaired glucose tolerance has several adverse effects on growing fetus. In this study we evaluated the effect of excessive weight gain during pregnancy on the risk of glucose intolerance in pregnant women. A case-control study was conducted through which the glucose tolerance status after 100 gram oral glucose intake was compared between 60 pregnant women with maximum 10 weeks of gestation and...

BACKGROUND Toll-like receptor 2 (TLR2) is a widely expressed pattern recognition receptor critical for innate immunity. TLR2 is also a key regulator of mucosal immunity implicated in the development of allergic disease. TLR2 activators are found in many common foods, but the role of TLR2 in oral tolerance and allergic sensitization to foods is not well understood. OBJECTIVE The purpose of thi...

Background:  A great number of premature neonates do not tolerate sufficient milk during the early neonatal period. Objective: To evaluate the effect of oral erythromycin on enhancement of feeding tolerance in preterm newborns. Methods: Sixty preterm neonates intolerant to milk of >75 ml/kg/day during 5 days after the start of feedings, were randomized into a treatment and a control groups.  Or...

Oral tolerance is classically defined as the suppression of immune responses to antigens (Ag) that have been administered previously by the oral route. Multiple mechanisms of tolerance are induced by oral Ag. Low doses favor active suppression, whereas higher doses favor clonal anergy/deletion. Oral Ag induces Th2 (IL-4/IL-10) and Th3 (TGF-beta) regulatory T cells (Tregs) plus CD4+CD25+ regulat...

The oral glucose tolerance test (OGTT) is currently the gold standard for the diagnosis of diabetes. The recommended preparation for and administration of the OGTT are important to ensure that test results are not affected. Interpretation is based on venous plasma glucose results before and 2 hours after a 75 g oral glucose load.

"Oral (food) tolerance" usually describes a clinical situation that is not necessarily synonymous with the immunological definition of "tolerance," that is, as observed during development, transplantation or neonatal tolerance. In the context of this chapter, "oral tolerance" is defined as an antigen-specific immunological hyporesponsiveness after prior enteral administration. Oral exposure to ...