2024-03-29T18:19:31Z
https://iji.sums.ac.ir/?_action=export&rf=summon&issue=3262
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Dendritic Cells in Transplant Tolerance
Mahyar
Nouri-Shirazi
Dendritic cells (DCs) are a heterogeneous family of professional APCs involved in priming adaptive immune responses. Donor DCs (direct pathway of allorecognition) and recipient DCs presenting processed donor major histocompatibility complex (MHC) as peptides (indirect pathway of allorecognition) participate actively in graft rejection by stimulating recipient T cell responses following organ transplantation. Recent studies have shown that DCs also play a central role in inducing and maintaining tolerance to self antigens (Ags) through deletion, anergy, and regulation mechanisms. It is easy to see how the remarkable functional plasticity of DCs renders them attractive therapeutic targets for immune modulation. Indeed, in the past few years, successful outcomes in rodent models have built the case that DC-based therapy may provide a novel approach to transplant tolerance. Ongoing research into our understanding of the mechanisms whereby DCs promote tolerance in the steady-state, together with development of biologi-cally, pharmacologically and genetically manipulated ex vivo DCs to mimic/enhance their natural tolerogenicity, should warrant the success of these experimental DCs in establishing long-term allograft survival.
Dendritic Cells
Graft Rejection
tolerance
2007
03
01
1
14
https://iji.sums.ac.ir/article_17174_57b2a83473af7f5407e77095406a841b.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Immunophenotypic Subtyping of Leukemic Cells from Iranian Patients with Acute Lymphoblastic Leukaemia: Association to Disease Outcome
Hossein
Asgarian Omran
Mahdi
Shabani
Tahereh
Shahrestani
Abdolfattah
Sarafnejad
Jalal
Khoshnoodi
Parvaneh
Vossough
Mohammad
Faranoush
Ramzan A.
Sharifian
Mahmood
Jeddi-Tehrani
Hodjatallah
Rabbani
Fazel
Shokri
Background: Immunophenotypic characterization of the leukemic cells has been widely used as a tool for diagnosis, classification, stratification and prognosis of leukaemia. Objective: To investigate the immunophenotypic subtype profiles of Iranian patients with acute lymphoblastic leukemia (ALL) and its association to disease outcome. Methods: In this study, a total of 60 Iranian patients with ALL were immunophenotyped by flow cytometry using a panel of monoclonal antibodies specific for CD2, CD3, CD5, CD10, CD13, CD14, CD19, CD20, CD33, CD34, CD45, HLA-DR and TdT molecules. Results: The samples were initially categorized into T-ALL (n=9), B-ALL (n=50) and mixed lineage (n=1) based on the expression patterns of CD3 and CD19 molecules. B-ALL patients could further be classified into four subtypes, including Pro-B (n=7, 11.7%), Pre-B I (n=28, 46.7%), Pre-B II (n=13, 21.7%) and immature/mature B cells (n=2, 3.3%) on the basis of expression of CD10, CD19, CD20, HLA-DR and TdT. Clinical manifestations and laboratory findings of the patients did not reveal association with immunophenotypic sub-types of ALL, with the exception of mediastinal mass and WBC count at the time of diag-nosis which were found to be significantly higher in patients with T-ALL compared with B-ALL (p=0.001 and 0.014), respectively. Conclusion: Our results indicate that overall the immunophenotypic profile of Iranian ALL patients is similar to previous reports and it might be used for monitoring of minimal residual disease and prognosis.
Immunophenotyping
ALL
Pro-B
Pre-B
Flow cytometry
2007
03
01
15
25
https://iji.sums.ac.ir/article_17175_3b1027bfbeed92620c438ad2421ea071.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Haussknechtia Elymatica: A Plant with Immunomodulatory Effects
Zahra
Amirghofran
Abbas
Azadmehr
Katayoun
Javidnia
Background: Plant extracts have been widely investigated for possible immunomodu-latory properties. Objective: To study the immunomodulatory functions of the metha-nol extract of Haussknechtia elymatica (Apioideae), an herb native to south-western Iran. Methods: Delayed type hypersensitivity (DTH) skin test and measurement of an-tibody titer after immunization with Sheep-RBC was performed. [3H]-thymidine incor-poration assay on the human lymphocytes stimulated with PHA and determination of IL-2 production using ELISA method was carried out. Results: Treatment of mice with increasing concentrations of the extract decreased the footpad thickness indicating a dose-related inhibitory effect of H. elymatica on delayed hypersensitivity. The mean antibody titers for all concentrations of the extract at primary and secondary responses were significantly less than the control. Addition of the extract to the culture of human peripheral blood lymphocytes in the presence of mitogen decreased cell proliferation dose-dependently. A dose related decrease in production of IL-2 in extract-treated cells was also observed. Conclusion: The decline of antibody titer and DTH response indi-cates that H. elymatica, by acting on the lymphocyte proliferation and IL-2 secretion, inhibits both humoral and cell-mediated immune responses.
Immunomodulation
Haussknechtia elymatica
2007
03
01
26
31
https://iji.sums.ac.ir/article_17176_eec7a2e7717af253d8d380e8d85676fa.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Decreased T Cell Response to Mitogen and Increased Anti-cytoplasmic Antibody in Drug-Free Schizophrenic Patients
Hedieh
Matloubi
Mohammad
Vodjgani
Abbass Ali
Nasehi
Mohammad Hossein
Niknam
Anoushirvan
Kazemnejad
Eisa
Salehi
Tahereh
Aboufazeli
Zahra
Gheflati
Background: Apart from genetic and environmental factors, activation of autoreactive mechanisms has been proposed to play a role in the pathogenesis of schizophrenia. In re-cent years, considerable work has been carried out to understand the role and contribution of the immune system in this disease. Objective: To investigate the T cell response to phytohaemagglutinin (PHA) and determine the serum levels of anti-nuclear antibody (ANA), anti-cytoplasmic antibody (ACA), and circulating immune complexes (CIC) in schizophrenic patients. Methods: A total of 30 drug-free schizophrenic patients and 42 healthy controls were enrolled in this study. T cell proliferation in response to PHA was measured using Methyl Thiazol Tetrazolium test. ANA and ACA were measured by indi-rect immunofluorescence. CIC concentration was determined using poly ethylene glycol precipitation assay. Results: Mean PHA response was 1.96 ± 0.83 in patients and 3.72±1.39 in healthy controls (p < 0.001). ANA and CIC concentrations were not signifi-cantly different between two groups. In addition, ACA was detected only in patients. Conclusion: Increased production of ACA together with lower T cell response to mito-gens in our patients provides evidence for the involvement of autoimmune mechanisms in the pathogenesis of schizophrenia.
Schizophrenia
T Cell Proliferation
ANA
ACA
CIC
2007
03
01
32
37
https://iji.sums.ac.ir/article_17177_83362c052eec1553c27b6c206507d943.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Assessment of the Immune System Activity in Iranian Patients with Major Depression Disorder (MDD)
Reza Farid
Hosseini
Farahzad
Jabbari Azad
Ali
Talaee
Sara
Miri
Naghme
Mokhber
Farhad
Farid Hosseini
Habibollah
Esmaeili
Mahmoud
Mahmoudi
Hoshang
Rafatpanah
Mohammadreza
Mohammadi
Background: Major Depression Disorder (MDD) is a common disorder with preva-lence of 15% among men and up to 25% among women. In recent years the association of immune system alterations and MDD has been investigated. Assessments of immu-nologic and inflammatory responses in these patients enhance our knowledge of the eti-ology and pathogenesis of this disease. Objective: To investigate the changes in immu-noglobulin and cytokine serum levels and lymphocyte subsets in patients with MDD. Methods: We studied 37 adult patients with MDD, diagnosed based on DSM-IV diag-nostic criteria, and 15 healthy controls matched with the patients. Plasma concentration of interleukin-4 (IL-4), IL-10, TNF α, and IFN γ were measured by ELISA and serum immunoglobulins by SRID. Total number of NK cells (CD16 and CD56), B cells (CD19), and T cells (CD8, CD4, and CD3) were determined by flow cytometry. Results: We found no significant differences in plasma concentration of IL-4, IL-10, TNF-α, IFN-γ, and immunoglobulins as well as total number of NK cells, B cells, and T cells between major depressed patients and healthy control subjects. Conclusion: We conclude that in our patients, there were no significant differences in immune system ac-tivity between MDD patients and controls.
Major Depression
Cytokines
Immunoglobulin
2007
03
01
38
43
https://iji.sums.ac.ir/article_17178_0851bf6e3cba30f0231b6807a5c1959c.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
C1 Inhibitor, C3 Activator, IgG, IgA, and IgM Titers in Nigerian Sickle Cell Disease Patients with Plasmodium falciparum
Ganiyu
Arinola
Chris
Ezeh
Background: Sickle cell disease (HbSS) is a major health problem in Nigeria and ma-laria has been implicated as a leading cause of morbidity/mortality in sickle cell disease patients. Few reasons were put forward to explain the observed morbidity/mortality of HbSS subjects due to Plasmodium falciparum (P. falciparum) malaria. Objectives: To determine the level of immunoglobulin classes (IgM, IgA, and IgG) and regulators of complement system (C1 inhibitor and C3 activator) in Nigerian HbSS patients with and without P. falciparum parasitemia. Methods: A total of 64 subjects were considered, including 10 HbSS genotypic subjects with P. falciparum parasitemia (HbSS+PfM), 18 HbAA genotypic subjects with P. falciparum parasitemia (HbAA+PfM), 20 HbSS without P. falciparum parasitemia (HbSS-PfM), and 16 HbAA genotypic subjects with-out P. falciparum parasitemia (HbAA-PfM). IgM, IgA, IgG, C1 inhibitor, and C3 acti-vator titers were quantified by single radial immunodiffusion method. Results: The mean levels of IgG in HbSS+PfM (2373.90±1772.81mg/dl) and HbAA+PfM (1868.80±0.00mg/dl) were significantly higher compared with HbSS-PfM (644.55±171.15mg/dl) or HbAA-PfM (659.75±158.01mg/dl) patients. HbAA-PfM sub-jects had the lowest level of IgM (67.27±63.7mg/dl), though no significant difference was observed comparing mean levels of IgM between the four groups. IgA titer was significantly higher in HbSS-PfM patients (249.00±94.8mg/dl) compared with HbAA-PfM (p<0.05), HbAA+PfM (p<0.05), or HbSS+PfM (p<0.05). The mean values of C1 inhibitor were lower in HbSS+PfM and HbAA+PfM compared with HbSS-PfM or HbAA-PfM. However, HbAA+PfM had a significantly lower value of C1 inhibitor compared with HbAA-PfM (p<0.01). C3 activator was highest in HbSS-PfM (17.10±7.35mg/dl) and was significantly higher compared with HbSS+PfM (p<0.05). Conclusion: Increased C1 inhibitor and decreased C3 activator in HbSS+PfM com-pared with HbAA+PfM shows that deranged regulation of complement factors may be responsible for increased susceptibility of HbSS to P. falciparum malaria.
Sickle Cell
Malaria
Nigeria
2007
03
01
44
49
https://iji.sums.ac.ir/article_17179_aad20b84745ed877047bcf6fbf673cbb.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Does Mesenchymal Stem Cell Therapy Help Multiple Sclerosis Patients? Report of a Pilot Study
Mandana
Mohyeddin Bonab
Sepideh
Yazdanbakhsh
Jamshid
Lotfi
Kamran
Alimoghaddom
Fatemeh
Talebian
Farnaz
Hooshmand
Ardeshir
Ghavamzadeh
Behrouz
Nikbin
Background: Mesenchymal stem cells (MSCs) with their potential to differentiate into mesodermal and non-mesodermal lineages have several immunomodulatory characteris-tics. These properties make them promising tools in cell and gene therapy. Objective: To evaluate the potential therapeutic applications of autologous MSC in improving clinical manifestations of MS patients. Methods: Ten patients were included in this pi-lot study. All had progressive disease that had not responded to disease modifying agents including Mitoxantrone. Their Expanded Disability Status Scale (EDSS) score ranged from 3.5 to 6. Patients were injected intrathecally with culture expanded MSCs. They were followed with monthly neurological assessment and a MRI scan at the end of the first year. Results: During 13 to 26 months of follow up (mean: 19 months), the EDSS of one patient improved from 5 to 2.5 score. Four patients showed no change in EDSS. Five patients’ EDSS increased from 0.5 to 2.5. In the functional system assess-ment, six patients showed some degree of improvement in their sensory, pyramidal, and cerebellar functions. One showed no difference in clinical assessment and three deterio-rated. The result of MRI assessment after 12 months was as following: seven patients with no difference, two showed an extra plaque, and one patient showed decrease in the number of plaques. Conclusion: This preliminary report emphasizes on the feasibility of autologous MSC for treatment of MS patients. However, in order to draw a definitive conclusion a larger sample size is required.
Mesenchymal Stem Cells
Multiple Sclerosis
2007
03
01
50
57
https://iji.sums.ac.ir/article_17180_585bec78febcf89c5381a673e3e957e4.pdf
Iranian Journal of Immunology
Iran.J.Immunol
1735-1383
1735-1383
2007
4
1
Ratio of CD4+ to CD8+ T-Cells in the Recent Reported Cases of Bird Flu Infection in Asia
Viroj
Wiwanitkit
2007
03
01
58
60
https://iji.sums.ac.ir/article_17181_60f56eaf6e332628a92d1639a4b2ab06.pdf