الحساسية الغذائية للروبيان : دراسة وبائية ومناعية وجزيئية في محافظة البصرة جنوب العراق == Food allergy of shrimp : Epidemiological,Immunological and Molecular Study inBasra Province, Southern of Iraq
Author name:
نور جاسم علي جودة
General topic:
Biology
Specific topic:
Life Science
Degree:
Master
University:
University Of Basrah - College Of Education For Pure Sciences
Language:
Arabic
University location:
Basrah
First pages:
24T3578 - p.pdf
Abstract:
A total of 210 human venous blood samples were collected from Basrah province ( 190 randomly collected from people living in different regions of Basrah province , 10 blood samples from people who did not have a history of shrimp consumption or dealing with it used as negative control group, anther 10 samples of people who are sensitive to shrimp used as a positive control group). The samples were serologically tested by Enzyme Linked Immunosorbent Assay (ELISA) to estimate the distribution of total and specificIgE in the sera of studied individuals . Polymerase Chain Reaction (PCR) was performed to detect the HLA - DQB1*02 , *0302 , *0305 allels. The immunological study included the preparation of two types of Metapenaeus affinis allergens which are the raw allergens and the boiled allergens used in Indirect ELISA test to determin shrimp food allergies by serodiagnosis , while Direct ELISA test was used to estimate the distribution of total IgE by quantitative serological methods in the sera of studied samples. the concentration of protein in antigens extracts was estimated, the protein concentration in the boiled shrimp extract was less than its concentration in the raw extract.The results of direct ELISA test demonstrated a decrease in the level of total IgE antibodies in most of the studied samples , the level of IgE <100 recorded a significant high rate 98.4% which is more than the level of IgE > 100 which recorded apercentage of 1.6% and there was a significant difference between them. The Indirect ELISA test results revealed that the total percentage of IgE distribution of the raw and boiled shrimp antigens were 57.8% and 74.2% respectively and there was a significant difference between males and females .However , the difference was not significant between the age groups P>0.05.The molecular study was conducted to detect the presence of some alleles HLADQB1* 02, *0302, *0305 gene in the blood samples by using PCR . The current study showed that the association of the presence of these alleles and the level of total immunoglobulin is highly significant.Also the current study showed that a high significant difference was found between the positive samples to the studied alleles and the seropositive and seronegative results of raw and boild shrimp allergen specific IgE based on Indirect ELISA (P≤0.01).The results of PCR showed a high frequency ratio of HLADQB1 * 0302 97.2% in allergic patients of shrimp boild allergen and 56.9% in allergic patients of shrimp raw allergen .Also the current study showed a very high frequency ratio of HLADQB1 *0305 98.2% in the individuals who showed positive results for the raw allergen and recorded 65.2%. in the individuals who showed positive results for the boild allergen ,while HLADQB1*02 showed in one sample of studied samples which recorded positive results to raw and boild allergens of shrimp .The current study demonstrated also that the alleles frequency in some of studied samples which are seronegative by Indirect ELISA test , HLADQB1*0302 was 30.9% in raw antigens, while in the negative boild sample was not observed . HLADQB1*0305 was 1.23% in serongative of raw allergen and 16.32% in boild allergen. However, HLADQB1*02 was notobserved in seronagative to raw and boild shrimp allergen.
