Evaluation of the IgE reactivity of common pandora parvalbumin in a Moroccan population and action of heating and enzymatic treatments

The aim of this study was to evaluate the immunoglobulin E (IgE) sensitivity to common pandora (Pagellus erythrinus) parvalbumin (CPP) in a Moroccan population from the Fez region, and then to study the effect of temperature and enzymatic digestion on the allergenicity of CPP. This work was conducted with a questionnaire completed by a sera-bank, obtained from 500 patients recruited from Fez hospitals. Their sera were analyzed for specific IgE against CPP. Evaluation of specific IgE showed that 11.8% of patients present higher values (>150 IU/ml). Further indirect ELISA and dot-blot results indicated that CPP showed a decrease in the binding of anti-IgE under heating with an average diminution of 41.9%, while pepsin hydrolysis reduced IgE recognition by 22.9%. These results demonstrate that this population was sensitive to CPP and the sensitivity could be reduced by heating and pepsin hydrolysis with an action higher with temperature than enzymatic digestion processing

Characterization and Stability of specific IgE to White Egg’s, Gliadin’s and Peanut’s Proteins among Children

The aim of the present study was to characterize allergen-specific immunoglobulin E (IgE) among children in Fez region. Eighty one children were recruited from the Hospital University Center of Fez. All of them had completed a questionnaire before taking sera. The sera were used to measure total IgE and specific data to proteins of egg's white (EWP), peanuts (PP) and gliadins (G). In last part, we studied the reactivity of specific IgE to native and to heat- and acid-treated allergens. Allergen-specific IgE measurement indicated more positive values for gliadins (46.9% up to 2IU/ml) than egg white's (29.6%) and peanut's proteins (22.2%). According to predictive values published by Sampson (2001), 14.3% of children are sensitive to egg white's proteins, 4.1% to gliadins and 2.7% to peanut's proteins. The allergenic potential of EWP and gliadins among children were partially diminished by heat and acid treatment. Allergen-specific IgE measurement indicates that children from Fez region are more sensitive to EWP than peanut's proteins and gliadins. Treatments of these food proteins indicated that recognition by children IgE can be reduced by thermal or acid treatment of these allergens

ANTIDIABETIC EFFECT OF THYMUS SATUREIOIDES AQUEOUS EXTRACT IN STREPTOZOTOCIN-INDUCED DIABETIC RATS

Objective: The aerial parts of Thymus satureioides have been traditionally used to treat diabetes mellitus and its complications in Morocco. The aim of the present study was to investigate the antidiabetic and antihyperlipidemic effects of the aqueous extract of Thymus satureioides aerial parts in streptozotocin (STZ) induced diabetic rats.Methods: Experimental diabetes was induced in overnight fasted rats by intraperitoneal injection of streptozotocin (45 mg/kg). Diabetic rats were orally administered with aqueous extract of Thymus satureioides (500 mg/kg b.w.) for 28 d. Glibenclamide (2 mg/kg), a standard antidiabetic drug, was used as a positive control drug. Body weight and fasting blood glucose (FGB) were measured every week. Oral glucose tolerance, change in lipid parameters, urea, creatinine, aspartate aminotransferase (ASAT) and alanine aminotransferase (ALAT) levels of diabetic rats were evaluated at the end of the treatment.Results: Administration of Thymus satureioides aqueous extract to diabetic rats for 28 d reduced their fasting blood glucose levels significantly compared to the diabetic control rats. The extract improved body weight and glucose tolerance in diabetic rats. The antihyperlipidemic assessment of the extract revealed a decrease in plasma total cholesterol, triglycerides, LDL levels and an increase in HDL level in the plasma of treated diabetic rats. Furthermore, the biochemical liver and kidney functional tests have shown that serum biomarkers of liver and renal dysfunction were significantly reduced in treated diabetic rats.Conclusion: The present findings suggest that Thymus satureioides extract has both antidiabetic and antihyperlipidemic effects in experimental diabetic rats which can be beneficial in the management of diabetes and its complications.Â

Effect of heating and enzymatic hydrolysis on casein cow milk sensitivity in Moroccan population

The objectives of the present work were first to evaluate the sensitivity to cow raw milk of the population of Fez, and then to study the effect of heating and pepsin hydrolysis on the allergenicity of casein. A cross-sectional study was carried out in Fez Hospitals, in which 1000 patients were recruited to establish a sera bank used to evaluate specific IgE to cow milk and to casein. Then, we evaluated the reaction of human IgE to heated and pepsin-hydrolysed casein. The results showed that 11.5% of the population studied self-reported reactions to foods. From them, 3.6% reported allergy to milk. Evaluation of specific IgE to cow raw milk showed that 11.9% of patients presented higher specific IgE levels. The treatments of casein indicated that both heating and pepsin hydrolysis totally decreased its binding on the human IgE