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Article
Is Chlamydia Pneumonia An Independent Risk Factor In Ischemic Heart Disease

Authors: Eman Sh. AL-Obeidy --- Eman Sh. AL-Obeidy
Journal: Iraqi Academic Scientific Journal المجلة العراقية للاختصاصات الطبية ISSN: 16088360 Year: 2010 Volume: 9 Issue: 2 Pages: 151-154
Publisher: The Iraqi Borad for Medical Specialization المجلس العراقي للاختصاصات الطبية

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Abstract

ABSTRACT:BACKGROUND:Immune system may interplay between Chlamydia pneumoniae infection and ischemic heart disease (IHD).Major histocompatibility genes regulate innate and adaptive immunity..OBJECTIVE:This study was established to shed light on the possible association between ischemic heart disease (IHD) with Chlamydia pneumoniae infection and HLA antigens.PATIENTS AND METHODS:Microlymphocytotoxicity assay has been applied for HLA-typing of 150 blood samples of 100 IHD patients and 50 healthy normal controls, In addition enzyme linked immunosorbant assay (ELISA) used to detedct C pnuminiae IgA and IgG.RESULTS:An increased frequency of HLA-A*2, B*35 alleland HLA-A*2-B*35 haplotype was observed for patients group versus control group with P-value (0.0001, 0.05, and 0.001) respectively.CONCLUSION:This finding demonstrated that the HLA-B*35 positive haplotypes confer the C.pneumoniae-related risk for IHD. HLA-DR3,DR4 and DR7 might play a role in AIH susceptibility


Article
ASSOCIATION BETWEEN HLA-CLASS II ALLELES AND T-CELL PROLIFERATION IN RESPONSE TO ENTEROVIRUSES AND ADENOVIRUS ANTIGENS IN NEWLY DIAGNOSED CHILDREN WITH TYPE 1 DIABETES MELLITUS
العلاقة بين مستضدات التطابق النسيجي- الصنف الثاني والفعالية الوظيفية للخلايا اللمفية بعد تحفيزها بمستضدات الحمات المعوية والحمات الغدية في الاطفال المصابين حديثاً بالسكري من النوع الأول

Author: ايمان مهدي صالح
Journal: Iraqi Journal of Biotechnology المجلة العراقية للتقانات الحياتية ISSN: 18154794 Year: 2010 Volume: 9 Issue: 2 Pages: 180-190
Publisher: Baghdad University جامعة بغداد

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Abstract

Viruses may be involved in the pathogenesis of Type 1 Diabetes Mellitus (T1DM), either through direct β-cell infection or as triggers of autoimmunity. T- cell proliferation was evaluated in response to Enteroviruses antigens including Coxsackievirus B and Poliovirus in addition to Adenovirus in an HLA- matched population of children with T1DM and in children who were apparently healthy. A total of 60 Iraqi T1DM children were included in the presents study. They were with new onset of the disease. For the purpose of comparisons, 50 apparently healthy control subjects were also selected. HLA typing was measured by microlymphocytotoxicity, while methylthiazoltetrazolium (MTT) assay was used for lymphocyte proliferation by culturing peripheral blood lymphocytes (PBL) with Coxsackievirus B5, Adenovirus 3, 4 and 7 and Poliovaccine. No significant differences were shown in the PBL proliferative percentage in response to Con-A mitogen and tested viruses (CVB5 and Adenovirus) between T1DM and healthy controls, but PBL proliferative percentage of patients showed a significant decline in response to Poliovaccine. HLA class II (-DR3, DR4, DQ2 and DQ3) antigens were significantly increased in T1DM patients and they played an important role in the etiology of the disease. Strong T-cell proliferation in response to the tested viral antigens were observed to be related to HLA-DR4 and HLA-DQ3 antigens, whereas the HLA-DR3 and HLA-DQ2 alleles were associated with week responsiveness to the same antigens. However, in children with new- onset diabetes, responses were decreased and this could be caused by trapping of virus- specific T- cells in the pancreas.

أثبتت العديد من الدراسات أن للفايروسات دوراً تؤديه في احداث امراضية مرض السكر من النوع الاول بالاصابة المباشرة لخلايا بيتا في البنكرياس أو بتحفيزالمناعه الذاتية. أجريت الدراسة لغرض تقييم الفعالية الوظيفية للخلايا اللمفية بعد تحفيزها بمستضدات الحمات المعوية والتي تشمل فايروس الكوكساكي نوع- ب وفايروس شلل الاطفال فضلا عن الحمة الغدية في مجموعة من الاطفال المصابين بمرض السكري من النوع الاول ومجموعة من الاطفال الاصحاء المطابقين لمستضدات التطابق النسيجي من الصنف الثاني. شملت الدراسة ستون مريضاً حديثي الاصابة بمرض السكري النوع الاول فضلا عن مجموعة السيطرة المكونة من 50 طفلا يبدون أصحاء ظاهريا لغرض التحري عن وجود أليلات الخطورة لمستضدات التطابق النسيجي- الصنف الثاني. تم قياس الفعالية الوظيفية للخلايا اللمفية بعد حضنها مع الفايروسات انفة الذكر. أظهرت النتائج انخفاضا غير معنويا في الفعالية الوظيفية للخلايا اللمفية كأستجابة للمشطر وكذلك بعد حضنها مع فايروس الكوكساكي النوع المصلي ب-5 وفايروس الحمة الغدية للانواع المصلية 3، 4, و 7 في الاطفال المرضى مقارنة بالاصحاء. ولكن هذا الانخفاض كان معنويا فقط عند استخدام فايروس شلل الاطفا ل .هناك زيادة معنوية في نسبة الاطفال الحاملين لاليلات الخطورة من الصنف الثاني مقارنة بالاصحاء HLA class II (-DR3, DR4, DQ2 and DQ3) antigens وهناك علاقة مباشرة وقوية بين الفعالية الوظيفية للخلايا اللمفية بعد حضنها مع المستضدات الفايروسية ومستضدات التطابق النسيجي , بينما كانت العلاقة ضعيفة مع المستضدات الاخرى HLA- DR4, HLA- DQ3HLA-DR; -DQ2. عموما كانت الاستجابة قليلة في الاطفال المرضى ولكن هناك زيادة محسوسة عند الاطفال الحاملين لاليلات التطابق النسيجي من النوع الثاني


Article
Human Leukocyte Antigens class II influence the expression of Glutamic Acid Decarboxylase auto antibodies in Type Diabetic children and their Siblings

Author: Eman Mahdi Saleh ايمان مهدي صالح
Journal: Al-Kindy College Medical Journal مجلة كلية الطب الكندي ISSN: 18109543 Year: 2010 Volume: 6 Issue: 1 Pages: 52-61
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The immunogenetic predisposition may be considered as an important factor for the development of Type 1 Diabetes Mellitus (T1DM) in association with the HLA antigens. Objective:This study was designed to investigate the role of HLA-class II antigens in the etiology of type T1DM and in prediction of this disease in siblings, and its effect on expression of glutamic acid decarboxylase autoantibodies (GADA). methods:Sixty children who were newly diagnosed type 1 diabetes (diagnosed less than five months) were selected. Their age ranged from 3-17 years. Another 50 healthy siblings were available for this study, their ages range from 3-16 years. Eighty apparently healthy control subjects, matched with age (4-17) years, sex and ethnic backgrounds (Iraqi Arabs) underwent the HLA-typing examination. Finally 50 healthy individuals were selected randomly to undergo GADA test.Results:At HLA-class II region, DR3 and DR4 were significantly increased in patients (53.33 vs.26.25% and 50.0 vs. 12.5% respectively) as compared to controls. In addition to that, T1DM was significantly associatedwith DQ2 (33.33 vs.15%) and DQ3 (40.0 vs.20%) antigens as compared to controls, suggesting that these antigens had a role in disease susceptibility, while the frequency of DR2 and DQ1 antigens were significantly lowered in patients compared to controls (6.66 vs.25% and 6.66 vs.22.5% respectively). These molecules might have protective effect. In siblings a significant increase frequency of DR4 antigen (34.0 vs.12.5%) was observed in comparison to controls, suggesting that it might be much useful for predicting T1DM in affected families.Anti-GAD autoantibodies were present in 50% of Type 1Diabetic children, and in 16% of their siblings. High proportion of GADA was found in the patients carrying HLA-DR3/DR4 heterozygous.conclusion:Both the T1DM patients and their siblings shared the HLA- DQ1 as protective antigens, while DR3 and DR4 were susceptible one, and high proportion of GADA was found in the T1DM patients and siblings carrying HLA-DR3/DR4 heterozygous.


Article
Class II Human Antigen in Iraqi patients with Hodgkin’s Lymphoma
دور الضد لكريات الدم البيض نوع II البشري في المرضى العراقيين المصابين بسرطان هوجكن اللمفي

Author: Haethem Qassim Mohammed هيثم قاسم محمد
Journal: Iraqi Journal of Cancer and Medical Genetics المجلة العراقية للسرطان والوراثة الطبية ISSN: 20786123 Year: 2010 Volume: 3 Issue: 2 Pages: 24-29
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Objective: To detect the association between human leukocyte antigen) HLA) class II and Iraqi patients with Hodgkin’s lymphoma (hl).Subject and methods: Study groups include 80 newly diagnosed Hodgkin’s lymphoma patients and two control group patients control which include 50 patients who were newly diagnosed to be affected by non Hodgkin’s lymphoma (NHL) and healthy individuals. Antibody mediated complement dependent cytotoxicity assay was done by treating sample of patients lymphocytes with a panel of anti-HLA antisera and complement.Results: The frequency expression of hla-dr3 and DQ1 was significantly greater in Hodgkin’s lymphoma patients thanhealthy control group with (p<0.001) for HLA-DR3 and (p<0.005) for DQ1.Conclusion: Hla-dr3 and dq1 are more related with Hodgkin’s lymphoma in Iraqi Arab population that reflect HLAalleles have immunogenetic factors of predisposition to Hodgkin lymphoma

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