Lymphoid Tissue and Pathological Influences of Toxicants

Toxicologic pathology plays a crucial role in the identification and interpretation of substance-induced health effects. Histology of lymphoid organs is quite sensitive, although it does not flag every model immunotoxic substance. Subtle interferences of toxic compounds, like transmembrane signaling and cell activation, are often not detectable...

Lymphoid Tissue and Pathological Influences of Toxicants

Toxicologic pathology plays a crucial role in the identification and interpretation of substance-induced health effects. Histology of lymphoid organs is quite sensitive, although it does not flag every model immunotoxic substance. Subtle interferences of toxic compounds, like transmembrane signaling and cell activation, are often not detectable...

Effects of cyclosporin A and cyclophosphamide on Peyer's patches in rat, exposed in utero and neonatally or during adult age

The effects of cyclosporin A (CY) and cyclophosphamide (CPS) on Peyer's patches (PP) were studied in Wistar rats, exposed in utero and neonatally or during adult age. In one study, pregnant dams received 5 or 15 mg/kg bw/day CY from gestation day 6 to day 21 of lactation. In two other studies, animals were exposed at young adult age: female rats...

Bis(tributyltin)oxide (TBTO) decreases the food allergic response against peanut and ovalbumin in Brown Norway rats

Other factors than the allergen itself may be of importance in the development of food allergy. This report describes the influence of the immunosuppressive compound bis(tributyltin)oxide (TBTO), present in the food chain, on the development of food allergy to peanut or ovalbumin in Brown Norway (BN) rats. To study these effects BN rats were...

Initiating mechanisms of food allergy: Oral tolerance versus allergic sensitization

Immediately after birth the mucosa of the gastrointestinal tract, which represents the greatest body surface area exposed to the outside environment, is confronted with a large variety of foreign antigens. The immune system of the intestine now has to meet the task of discriminating between pathogens and harmless antigens, such as food proteins...

Histopathology of mucosa-associated lymphoid tissue

Mucosa-associated lymphoid tissue (MALT) is a generalized term incorporating a disseminated collection of lymphoid tissues in multiple sites throughout the body. MALT sites that have been/are primarily studied include bronchus-associated lymphoid tissue (BALT), gut-associated lymphoid tissue (GALT), and nasopharynx-associated lymphoid tissue ...

Most probable origin of coeliac disease is low immune globulin A in the intestine caused by malfunction of Peyer's patches

Coeliac disease frequency increases by obscure reasons and affects in some Western countries as much as 1% of the populations. The second one of monozygotic twins does not develop the disease in 100% but only in 20-50%. To unravel these mysteries, literature was searched to determine the disease background and find suggestions for research and...

Strain-dependent induction of cytokine profiles in the gut by orally administered Lactobacillus strains

Different Lactobacillus strains are frequently used in consumer food products. In addition, recombinant lactobacilli which contain novel expression vectors can now be used in immunotherapeutic applications such as oral vaccination strategies and in T cell tolerance induction approaches for autoimmune disease. Both for food and clinical...