Mohammadreza Yazdani; Shahdad Khosropanah; Ahmad Hosseini; Mehrnoosh Doroudchi
Volume 13, Issue 4 , December 2016, , Pages 249-262
Abstract
Background: Atherosclerosis is a chronic inflammatory disease affecting large and
medium arteries. CD4+ T cells are known to play a role in the progression of the
disease. CD4+CD25+Foxp3+ natural Treg (nTreg) cells seem to have a protective role
in the disease and their reduction in acute coronary ...
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Background: Atherosclerosis is a chronic inflammatory disease affecting large and
medium arteries. CD4+ T cells are known to play a role in the progression of the
disease. CD4+CD25+Foxp3+ natural Treg (nTreg) cells seem to have a protective role
in the disease and their reduction in acute coronary syndrome is recently shown.
Objective: To investigate the frequency of nTreg subsets in the peripheral blood of
patients with atherosclerosis. Methods: Confirmation of atherosclerosis was done by
angiography and 15 ml heparinized blood was obtained from each of the 13 nondiabetic
patients and 13 non-diabetic, non-smoker individuals with normal/insignificant
coronary artery disease which was also confirmed by angiography. Lipid profiles of the
patients and controls were measured at the time of sampling. Mononuclear cells were
used for both RNA extraction and immunophenotyping by real-time PCR and
flowcytometry techniques, respectively. Results: In natural Treg subsets, the frequency
of CD4+CD45RO-CD25+Foxp3lo T-cells (resting nTregs) was greater in controls than
patients (p=0.02). The frequency of CD4+CD45RO+CD25hiFoxp3hi T-cells (activated
nTregs) was significantly higher in controls compared with patients (p=0.02). However,
the frequency of CD4+CD25+CD45RO+Foxp3- T-cells (effector/memory) increased in
patients compared with controls (p=0.01). Both the MFI and gene expression of Foxp3
were higher in control group than in patients (p=0.015 and p=0.017, respectively).
Moreover, the TGF-β gene expression showed a decrease in the peripheral blood
mononuclear cells of patients compared with controls (p=0.03). Conclusion: Decrease
in both subsets of resting and activated nTregs along with a decrease in the expression
of Foxp3 and TGF-β genes in patients with atherosclerosis suggests phenotypic changes
in these subsets, which may as well be correlated with a more inflammatory profile in
their lymphocytes.
Mahdi Sajedi Khania; Alireza Abdi Ardekan; Shahdad Khosropana; Mehrnoosh Doroudchi
Volume 13, Issue 2 , June 2016, , Pages 100-113
Abstract
Background: Acute Myocardial Infarction (AMI) is the leading cause of disability and death in Iran and many other countries. Objective: To investigate the prognostic value of CCL5 and CCL18 in patients with acute myocardial ischemia. Methods: In this cohort study we recruited and followed 50 patients ...
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Background: Acute Myocardial Infarction (AMI) is the leading cause of disability and death in Iran and many other countries. Objective: To investigate the prognostic value of CCL5 and CCL18 in patients with acute myocardial ischemia. Methods: In this cohort study we recruited and followed 50 patients with acute anterior myocardial infarction (AAMI) for developing cardiovascular accidents in a 6-month period. CCL5 and CCL18 levels were measured on admission, at day 5 and at day 180 posthospitalization. Results: CCL18 and CCL5 levels at day 180 were higher in patients with late (day 180) and early (day 5) LVEF less than 35% compared to those with higher LVEF (p=0.05 and p=0.042, respectively). There was a negative correlation between early and late LVEF and regional wall motion abnormalities (p=0.001 and p=0.002, respectively). There was also a trend of negative correlation between CCL18 levels at day 5 and LVEF levels at day 180 post-hospitalization (p=0.06). Conclusion: CCL18 has a correlation with cardiac function in patients with AAMI and it might be considered as an indicator of poor LVEF in patients with AAMI.
Mohammad Hossein Nikoo; Seyed Rahmatollah Taghavian; Hossein Golmoghaddam; Narges Arandi; Alireza Abdi Ardekani; Mehrnoosh Doroudchi
Volume 11, Issue 4 , December 2014, , Pages 246-258
Abstract
Background: Atrial Fibrillation (AF) is the most common cardiac arrhythmia and an independent risk factor for stroke among the elderly. A role for inflammation in the atrial remodeling as well as development and recurrence of AF is known. Objective: To compare IL-17A between patients with different types ...
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Background: Atrial Fibrillation (AF) is the most common cardiac arrhythmia and an independent risk factor for stroke among the elderly. A role for inflammation in the atrial remodeling as well as development and recurrence of AF is known. Objective: To compare IL-17A between patients with different types of AF and healthy individuals. Methods: IL-17A was measured in sera of 112 patients and 107 healthy age/sexmatched controls using ELISA assay. In sera of 26 patients with elevated IL-17A (>1 Pg/ml), CCL5 and CCL18 levels were also measured. Results: IL-17A was significantly increased in patients with AF compared to controls (1.28 ± 3.5 vs. 0.19 ± 0.64 Pg/ml, p=0.001). There was no significant difference in the level of IL-17A between different types of AF. IL-17A was significantly higher in patients with a history of coronary artery bypass graft compared to other patients (p=0.01). A significant positive correlation between IL-17A and CCL18 concentration was found (p=0.001). An increase in the Neutrophil/Lymphocyte ratio (NLR) was observed in patients with elevated serum IL-17A compared to other patients (p=0.006). Male patients showed higher increase in NLR (p=0.007) which was accompanied by a decrease in CCL5 (p=0.000) and a marginal increase in CCL18 (p=0.085) compared to females. There was an increase in CCL5 levels in patients receiving Acetylsalicylic Acid (ASA) therapy (p=0.046). Conclusions: The increase in IL-17A levels is related to the AF pathology mediated by neutrophils and monocytes. The current study signifies the role of immune cells and cytokines in the pathology of AF.
Mehrnoosh Doroudchi; Abdolrasoul Talei; Helmout Modjtahedi; Alamtaj Samsami Dehaghani; Abdol Mohammad Pezeshki; Hilary Thomas; Abbas Ghaderi
Volume 2, Issue 4 , December 2005, , Pages 191-200
Abstract
Background: A soluble form of HER-2/neu extracellular domain (sHER-2) is reported to be released in the sera of metastatic breast cancer patients. Objective: To measure the level of sHER-2 in sera of 115 breast cancer patients. Methods: Serial samples of 27 patients with metastasis, 18 non-metastatic ...
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Background: A soluble form of HER-2/neu extracellular domain (sHER-2) is reported to be released in the sera of metastatic breast cancer patients. Objective: To measure the level of sHER-2 in sera of 115 breast cancer patients. Methods: Serial samples of 27 patients with metastasis, 18 non-metastatic patients, 15 patients in stage 0/I and 14 patients with accompanying benign breast disease were also included in this study. Results: No significant difference was observed between sHER- 2 level in the pre-operative sera of breast cancer patients and that of healthy individuals. Only 8 out of 27 patients whom later developed metastasis showed elevated levels of sHER-2 in their first serum sample. However, a trend of increase in the level of sHER-2 was observed in 14 (51.8%) of 27 metastatic sera before clinical diagnosis of the metastasis. A significant association between sHER-2 positive status and vascular invasion of the tumor was observed (P = 0.02). In addition, significant correlation of sHER-2 level with CEA (highest r = 0.74) and CA 15.3 (highest r = 0.74) tumor marker levels in the serial sera were observed. The mean time from sHER-2 positivity to tumor metastasis was calculated to be 98 days (range = 29-174). Conclusion: Our results indicate that a relatively high percentage of Iranian patients with breast cancer show an elevated level of sHER-2 in their sera before clinical diagnosis of the tumor metastasis. Therefore, measuring the level of this oncoprotein, not only helps physicians in monitoring the patients during HERCEPTINTM therapy, but also can be helpful in choosing more aggressive treatments at the early satges of tumor metastasis.
Mohammad Javad Fattahi; Abdul Mohammad Pezeshki; Maryam Emad; Mohammad Hosein Lohrasb; Azra Shamseddin; Abbas Ghaderi; Mehrnoosh Doroudchi
Volume 2, Issue 2 , June 2005, , Pages 97-102
Abstract
Background: Vitiligo is an acquired skin disorder that selectively destroys melanocytes in epidermis with an unknown etiology. Objective: To investigate the exon 1 A49G polymorphism of cytotoxic T lymphocyte antigen-4 (ctla-4) gene in vitiligo patients. Methods: The A49G polymorphism was ...
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Background: Vitiligo is an acquired skin disorder that selectively destroys melanocytes in epidermis with an unknown etiology. Objective: To investigate the exon 1 A49G polymorphism of cytotoxic T lymphocyte antigen-4 (ctla-4) gene in vitiligo patients. Methods: The A49G polymorphism was detected by Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) method in 101 patients and 208 normal healthy age/ethnicity matched individuals. Results: The frequencies of heterozygote genotypes in patients and controls were found to be 42 (41.6%) of 101 and 85 (40.9%) of 208, respectively. The frequencies of homozygote A and G genotypes were 49 (48.5%) and 10 (9.9%) in 101 patients, whereas, these frequencies in 208 control individuals were 103 (49.5%) and 20 (9.6%), respectively. There was no significant difference between the genotype (P = 0.98) and allele (P = 0.86) frequencies of A49G polymorphism in patients and normal healthy individuals. Conclusion: Our results indicate that in contrast to several immune mediated disorders, there is no association between ctla-4 A49G gene polymorphism and vitiligo.
Mehrnoosh Doroudchi; Hamidreza Dehshiri; Alamtaj Samsami Dehaghani
Volume 1, Issue 3 , December 2004, , Pages 183-188
Abstract
Background: Respiratory Syncytical virus infection is the most common cause of bronchiolitis and viral pneumonia in infancy. Objective: To investigate the placental transfer of RSV-specific IgG in Iranian mothers. Methods: The antibodies were measured in sera of 146 mother/newborn pairs using a commercially ...
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Background: Respiratory Syncytical virus infection is the most common cause of bronchiolitis and viral pneumonia in infancy. Objective: To investigate the placental transfer of RSV-specific IgG in Iranian mothers. Methods: The antibodies were measured in sera of 146 mother/newborn pairs using a commercially available indirect Enzyme Linked Immunosorbent Assay (ELISA). The studied subjects were among healthy pregnant women who attended to the Zeinabieh Hospital of Shiraz University of Medical Sciences in a one year period. Results: A highly significant correlation was observed between RSV-specific IgG in newborns and mothers (r = 0.88). However, mean RSV-specific IgG antibodies in neonates was significantly higher than that of their mothers (P = 0.019). In addition, the mean cord/maternal ratio of RSV-specific IgG was detected to be 1.27 ± 0.60. Maternal blood group, age, parity, previous abortions and neonatal gestational age had no correlation with placental transfer of RSV-specific IgG antibodies. Conclusion: Our finding demonstrates that placental transfer of RSV-specific IgG antibodies is an active process and the main factor that influences this transfer is maternal concentration of these immunoglobulins.
Ezzatallah Basiri; Sadreddin Mohseni Ardehali; Mehrnoosh Doroudchi; Fereidoun Mahboodi; Arsalan Kharazmi; Abbas Ghaderi
Volume 1, Issue 3 , December 2004, , Pages 194-199
Abstract
Background : Production of monoclonal antibodies to Leishmania antigens assists the identification and characterization of these organisms. Objective: Production of monoclonal antibodies against epitopes on the gp63. Methods: Two murine monoclonal antibodies to gp63 were produced and characterized. The ...
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Background : Production of monoclonal antibodies to Leishmania antigens assists the identification and characterization of these organisms. Objective: Production of monoclonal antibodies against epitopes on the gp63. Methods: Two murine monoclonal antibodies to gp63 were produced and characterized. The reactions of both antibodies with soluble leishmanial antigens, purified gp63 and truncated recombinant gp63 molecules were studied by an ELISA assay. These two antibodies reacted with the crude soluble antigens prepared from 4 reference strains of Leishmania, 10 isolates from the patients, purified gp63 and recombinant gp63 molecules. However, no reaction with several non-leishmanial antigens was observed. Reaction of both antibodies with the intact recombinant gp63 and truncated molecules were compared. Results: The results indicated that the two antibodies specifically recognize two different epitopes on the gp63 molecule. Conclusion: Possible applications of such antibodies in searching for immunogenic epitopes are discussed.
Fatemeh Vahedi Darmian; Soheila Joubeh; Mehrnoosh Doroudchi; Behnam Abdollahi; Abbas Ghaderi
Volume 1, Issue 1 , June 2004, , Pages 48-55
Abstract
Background: Vitiligo is a dermatological disorder of unknown etiology with a common incidence in southern Iran. Presence of autoantibodies to melanocyte antigens suggested an autoimmune basis of the disease. Objective: In this study, the presence of rheumatoid factor (RF) in sera and skin biopsies of ...
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Background: Vitiligo is a dermatological disorder of unknown etiology with a common incidence in southern Iran. Presence of autoantibodies to melanocyte antigens suggested an autoimmune basis of the disease. Objective: In this study, the presence of rheumatoid factor (RF) in sera and skin biopsies of vitiligo patients was investigated. Methods: The presence of RF in sera of 35 vitiligo and 32 normal individuals was assessed by an indirect ELISA assay. In addition, the presence of IgM, IgG, and IgA immunoglobulins in the biopsy lesions of patients was also investigated by Immunoperoxidase test. Results: IgM-RF and IgA-RF were detected in sera of 50% and 20% of patients, respectively. Five out of 35 (15%) revealed to produce both IgM and IgA rheumatoid factors. The rheumatoid factor activity of the deposited immunoglobulins at the site of lesion was confirmed by direct immunoperoxidase test. Conclusion: The presence of rheumatoid factors as non organ-specific autoantibodies in vitiligo provides further evidence for the autoimmune etiology of the disease and its pathological importance remains to be elucidated.
