High Incidence of Donor-Reactive Delayed-Type Hypersensitivity Reactivity in Transplant Patients

Hypersensitivity Responses in Cardiac Donor-Reactive Delayed-Type That Plasminogen Activator Controls Mechanisms of Graft Acceptance: Evidence

THE EFFECT OF ASCORBIC ACID ON BLOOD HISTAMINE LEVEL AND DELAYED-TYPE HYPERSENSITIVITY IN GUINEA PIGS

The effect of ascorbic acid on blood histamine level and delayed-type hypersensitivity was studied in thirty male guinea pigs. Animals were sensitized to B.C.G., trichophytin and mallein during the first four weeks. The diet was ad libitum during this period. After this "sensitization period" animals w er e tested intradermally with tuberculin, trichophytin and mallein. The number and diam...

Oral tolerance for delayed type hypersensitivity contribution of local and peripheral mechanisms

Oral tolerance is a physiological immune mechanism, which controls the outcome of deleterious hypersensitivity reactions to environmental antigens absorbed through the gastrointestinal tract, and maintains homeostasis. Using a mouse model of oral tolerance of delayed type hypersensitivity to contact allergens, i.e. haptens, we have examined the mechanisms involved in the induction of oral toler...

Absence of cross-reactivity to carbapenems in patients with delayed hypersensitivity to penicillins.

Studies performed on subjects with IgE-mediated hypersensitivity to penicillins have demonstrated a 1% rate of cross-reactivity between penicillins and both imipenem and meropenem, while a single study found a 5.5% rate of cross-reactivity with imipenem/cilastatin in subjects with T-cell-mediated hypersensitivity to β-lactams, mostly penicillins. We studied 204 consecutive subjects with a well-...

2088 Induction of Delayed - Type Hypersensitivity

Delayed-type hypersensitivity (DTH) 1 is a T cell-mediated reaction resulting in a mononuclear cell-rich inf lammat ion and swelling that peak 24-48 h after local antigenic challenge. In spite of the extensive use of D T H to dissect regulatory (1), genetic (2), and molecular (3) aspects of in vivo T cell responses, little is known of factors that regulate the persistence o f these reactions. I...