Isolation of tryptophan as an inhibitor of ovalbumin permeation and analysis of its suppressive effect on oral sensitization.

Indoleamine 2,3-Dioxygenase and Immunological Tolerance during Pregnancy

Indoleamine 2,3-dioxygenase (IDO), an enzyme involved in the catabolism of tryptophan, is expressed by a variety of cells and tissues such as macrophages, dendritic cells, cells of the endocrine system and by the placenta. IFN- γ is the main inducer of this enzyme. IDO acts as an important defense mechanism of innate immunity against pathogens. It also has tumor suppressive activity and prolong...

Oral administration of Teucrium polium extract ameliorates ovalbumin-induced allergy in rats

Introduction: There are about 120 million people around the world who suffer from allergies. This is a huge number and all these individuals currently use anti-allergic drugs that are associated with numerous side effects. In order to find an appropriate complementary drug from traditional folk medicine, Teucrium polium was examined. Prednisolone was used as a control anti-allergic drug. Me...

The Effect of Carvacrol on Serum Cytokines and Endothelin Levels of Ovalbumin Sensitized Guinea-Pigs

Enzyme Assay Guided Isolation of an α-Amylase Inhibitor Flavonoid from Vaccinium arctostaphylos Leaves

The management of postprandial hyperglycemia is an important strategy in the control of diabetes mellitus and complications associated with the disease, especially in the diabetes type 2. Therefore, inhibitors of carbohydrate hydrolyzing enzymes can be useful in the treatment of diabetes and medicinal plants can offer an attractive strategy for the purpose. Vaccinium arctostaphylos leaves are c...

The preventive effect of Brassica napus L. oil on pathophysiological changes of respiratory system in experimental asthmatic rat

Objective: Asthma is an airway complex disease defined by reversible airway narrowing and obstruction, chronic airway inflammation, airway hyperresponsiveness, and tissue remodeling. The purpose of this study was to determine the effect of Brassica napus L. (B. napus) on airway pathologic changes in a rat model of asthma. Materials and Methods: Twenty-four rats were divided into 4 groups: contr...