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دور مستارجات حشرتي الصرصر الامريكي Periplaneta mericana والبعوض Culex pipiens على فرط التحسس من النوع الاول وعلاقتها مع بعض الائل مستضدات معقد التوافق النسيجي من الصنف الثاني
Author name:
هدى كاظم كريم الموسوي
Supervisor name:
فوزية علي عبد الله | ضياء خليف كريم
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:
24T3582 - p.pdf
Abstract:
This study aimed to verify the distribution of Periplaneta americana and Culex pipiens allergy and its association with some HLA class II alleles in asthmatic and allergic patients. 96 healthy (control ) and 96 suspected allergic individuals from the same geographical region ,paired by sex and age were included in this study. Enzyme Linked Immunosorbent Assay test (ELISA) was used to estimate the total and specific IgE antibodies in the sera of studied individuals. The detection of the HLA - DQB1*0602, HLADQB1* 0604 and HLA - DRB1*12 was performed by Polymerase Chain Reaction (PCR).The results of total IgE based ELISA which was conducted on 96 suspected allergic and24 healthy (control ) individuals revealed that there was extremely significant statistical association (P<0.0001) for total IgE concentration with being allergic or non allergic status of individuals. The overall frequency of higher total IgE antibody concentration ( IgE>200IU/ml) was observed in 72.9% of allergic patients and lower serum total IgE levels (IgE<200IU/ml) were associated with 87.5% of healthy individuals. According to the specific IgE based ELISA results the effect of allergic patients age on the IgE seropositivity against cockroach allergens was not considered to be significant(p>0.05),but the effect of sex was statistically significant)P<0.05(.There was no significant effect( p>0.05)for patients age and sex on the distribution of IgE antibodies against mosquito allergens. Out of 96 allergic patients, 59 (61.5%)and 62(64.6%)showed positive IgE antibody response against cockroach and mosquito allergens respectively. Concerning the PCR results the overall frequency of HLA - DQB1*0602 and HLA - DQB1*0604 alleles was %35.6 and %15.3 of cockroach allergic patients respectively and the HLA - DRB1*12 allele was not observed in these patients..Out of 62 mosquito allergic patients, 8(%12.9)showed HLA - DQB1 * 0602 positive results while HLA - DQB1*0604 allele was observed in 4(%6.5)patients and the HLA - DRB1*12 allele was not observed in these patients.The difference in the genotypig results was extremely highly significant(χ2 : 0.030;17.486; degrees of freedom(DF) : 3;p - value=0.00056136) between cockroach and mosquito allergic patients .The association between the presence HLA - DQB1 *0602 , HLA - DQB1 * 0604 and HLA - DRB1*12 and total IgE based ELISA results in allergic patients and healthy individuals revealed that the percentage of HLA - DQB1 * 0602, HLA - DQB1 * 0604 and HLA - DRB1*12 alleles presence in patients having total IgE lower total IgE )IgE<200 IU/ml) was higher than that of high )IgE>200 IU/ml) total IgE patients where HLA - DQB1*0602 appeared in high percentage(69.2%) followed by percentage (15.4 %( of HLA - DQB1* 0604 presence. . The relationship of HLA - DQB1and HLADRB1 alleles with the results of total IgE based ELISA was statistically significant in the least(χ2 : 60.756 and the degree of freedom (DF) : 5;p= P<0.00001) and greatest(χ2 : 11.806 ; the degree of freedom (DF) : 5 ; p = 0.037544) than 200 IU / ml, values .Depending on the association between the presence of HLADQB1* 0602 ,HLA - DQB1*0604 and HLA - DRB1*12 and positive or negative specific results of cockroach or mosquito allergens specific IgE based ELISA results in allergic patients revealed that the percentage of HLA - DQB*0602,HLA - DQB1*0604 and HLA - DRB1*12 alleles presence in cockroach allergic patients having positive results were higher than those ratios that have been observed in patients with negative ELISA results where HLA - DQB1*0602 appeared in high percentage)35.6%( followed by percentage( 15.3% )of HLA - DQB1*0604 . The relationship of HLADQB1and HLA - DRB1 alleles with the results of specific IgE based ELISA was statistically significant (χ2 : 10.412; DF : 3; p - value =0.01536989).Incontrast the percentage of HLA - DQB1*0602,HLADQB1*0604 and HLA - DRB1*12 alleles presence in mosquito allergic patients was found to be higher in negative ELISA results patients also the relationship of these HLA - DQB1 alleles with mosquito allergen specific IgE based ELISA results was not considared statistically significant (χ2 : 3.115 ;DF : 3 and p= 0.37423205).However HLA - DQB1 * 0602 allele was found in the highest percentage (20.6%), followed by allele HLA - DQB1 * 0604 (8.8%).Concerning the presence of HLA - DQB1*0602 ,HLA - DQB1*0604 andHLA - DRB1*12 in cockroach or mosquito allergic patients and healthy individuals,the HLA - DRB1*12 and HLA - DQB1*0602 allels were not found in healthy individuals.The genotyping results difference between cockroach allergic patients and healthy individuals was considered statistically extremely significant (χ2 : 74.485 ;DF : 5 and p =0) as well as the difference in the results of the genotyping of mosquitoes allergic patients and healthy people was statistically with very high significant (χ2 : 23.342 ; DF : 5 and p = 0.00029035).
